/* roulang page: index */
:root{
  --ark-primary:#0E7C66;
  --ark-primary-2:#12A085;
  --ark-primary-soft:#E3F3EE;
  --ark-accent:#FF7A45;
  --ark-accent-soft:#FFEDE4;
  --ark-badge:#FFC53D;
  --ark-ink:#16221F;
  --ark-ink-2:#5A6B66;
  --ark-line:#E8E2D7;
  --ark-bg:#FBF8F3;
  --ark-surface:#FFFFFF;
  --ark-surface-2:#F4EFE6;
  --ark-dark:#0B2A24;
  --ark-grad-brand:linear-gradient(135deg,#0E7C66 0%,#12A085 55%,#3FC79E 100%);
  --ark-grad-warm:linear-gradient(135deg,#FF7A45 0%,#FFB27A 100%);
  --ark-font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ark-num:"DIN Alternate","Bahnschrift",ui-monospace,"SF Mono",Menlo,monospace;
  --ark-r-s:10px;
  --ark-r-m:16px;
  --ark-r-l:22px;
  --ark-r-xl:28px;
  --ark-r-pill:999px;
  --ark-sh-1:0 2px 8px rgba(16,52,45,.05);
  --ark-sh-2:0 10px 28px rgba(16,52,45,.09);
  --ark-sh-3:0 18px 44px rgba(16,52,45,.14);
  --ark-focus:0 0 0 4px rgba(18,160,133,.22);
  --ark-ease:.22s cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--ark-font);
  font-size:16px;
  line-height:1.8;
  color:var(--ark-ink);
  background:var(--ark-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ark-primary);text-decoration:none;transition:color var(--ark-ease);}
a:hover{color:var(--ark-primary-2);}
button{font-family:inherit;}
h1,h2,h3,h4,h5{margin:0;color:var(--ark-ink);font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
::selection{background:var(--ark-primary-soft);color:var(--ark-primary);}
:focus-visible{outline:none;box-shadow:var(--ark-focus);border-radius:6px;}
.ark-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.ark-num{font-family:var(--ark-num);font-variant-numeric:tabular-nums;font-feature-settings:"tnum";}

/* ============ 顶部导航 ============ */
.ark-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(251,248,243,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:box-shadow var(--ark-ease),border-color var(--ark-ease);
}
.ark-header.is-stuck{border-bottom-color:var(--ark-line);box-shadow:var(--ark-sh-1);}
.ark-head-top{height:72px;display:flex;align-items:center;transition:height var(--ark-ease);}
.ark-header.is-stuck .ark-head-top{height:56px;}
.ark-head-inner{display:flex;align-items:center;gap:20px;width:100%;}
.ark-logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ark-ink);}
.ark-logo:hover{color:var(--ark-ink);}
.ark-logo-mark{
  width:40px;height:40px;border-radius:14px;flex:0 0 auto;
  background:var(--ark-grad-brand);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:19px;font-weight:800;box-shadow:var(--ark-sh-1);
  transition:transform var(--ark-ease);
}
.ark-logo:hover .ark-logo-mark{transform:rotate(-6deg) scale(1.04);}
.ark-logo-text{display:flex;flex-direction:column;line-height:1.2;}
.ark-logo-text strong{font-size:16.5px;font-weight:800;letter-spacing:.01em;}
.ark-logo-text em{font-style:normal;font-size:11px;color:var(--ark-ink-2);letter-spacing:.06em;}
.ark-nav{display:flex;align-items:center;gap:4px;margin-left:8px;flex:1 1 auto;}
.ark-nav a{
  position:relative;display:inline-block;padding:8px 11px;border-radius:var(--ark-r-s);
  font-size:14.5px;color:var(--ark-ink-2);font-weight:500;white-space:nowrap;
  transition:color var(--ark-ease),background var(--ark-ease);
}
.ark-nav a::after{
  content:"";position:absolute;left:11px;right:11px;bottom:2px;height:3px;border-radius:3px;
  background:transparent;transition:background var(--ark-ease);
}
.ark-nav a:hover{color:var(--ark-primary);background:var(--ark-primary-soft);}
.ark-nav a.is-active{color:var(--ark-primary);font-weight:700;}
.ark-nav a.is-active::after{background:var(--ark-primary);}
.ark-search{
  display:flex;align-items:center;gap:8px;flex:0 0 auto;
  background:var(--ark-surface-2);border-radius:var(--ark-r-pill);
  padding:0 14px;height:40px;border:1.5px solid transparent;
  transition:border-color var(--ark-ease),box-shadow var(--ark-ease),background var(--ark-ease);
}
.ark-search:focus-within{border-color:var(--ark-primary);background:#fff;box-shadow:var(--ark-focus);}
.ark-search i{font-size:13px;color:var(--ark-ink-2);}
.ark-search input{
  border:0;background:transparent;outline:none;font-size:13.5px;width:118px;color:var(--ark-ink);
}
.ark-search input::placeholder{color:#98a8a3;}

/* 按钮 */
.ark-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--ark-r-pill);
  font-size:15px;font-weight:600;border:1.5px solid transparent;
  cursor:pointer;text-align:center;white-space:nowrap;
  transition:transform var(--ark-ease),box-shadow var(--ark-ease),background var(--ark-ease),color var(--ark-ease),border-color var(--ark-ease);
}
.ark-btn:active{transform:translateY(1px) scale(.995);}
.ark-btn-primary{background:var(--ark-grad-brand);color:#fff;box-shadow:var(--ark-sh-1);}
.ark-btn-primary:hover{color:#fff;box-shadow:var(--ark-sh-2);filter:brightness(1.05);}
.ark-btn-ghost{background:#fff;color:var(--ark-primary);border-color:var(--ark-line);}
.ark-btn-ghost:hover{color:var(--ark-primary);border-color:var(--ark-primary);background:var(--ark-primary-soft);}
.ark-btn-white{background:#fff;color:var(--ark-primary);}
.ark-btn-white:hover{color:var(--ark-primary);box-shadow:var(--ark-sh-2);transform:translateY(-2px);}
.ark-btn-sm{height:40px;padding:0 18px;font-size:14px;}
.ark-link-more{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--ark-primary);
}
.ark-link-more i{transition:transform var(--ark-ease);font-size:12px;}
.ark-link-more:hover i{transform:translateX(3px);}

/* 热词条 */
.ark-chips-bar{
  border-top:1px solid var(--ark-line);
  background:rgba(251,248,243,.6);
  overflow:hidden;
  transition:max-height var(--ark-ease),opacity var(--ark-ease);
  max-height:52px;
}
.ark-header.is-stuck .ark-chips-bar{max-height:0;opacity:0;border-top-color:transparent;}
.ark-chips{
  display:flex;align-items:center;gap:8px;padding:9px 0;overflow-x:auto;
  scrollbar-width:none;-ms-overflow-style:none;
}
.ark-chips::-webkit-scrollbar{display:none;}
.ark-chips .ark-chips-label{font-size:12.5px;color:var(--ark-ink-2);flex:0 0 auto;letter-spacing:.02em;}
.ark-chip{
  flex:0 0 auto;display:inline-block;padding:4px 13px;border-radius:var(--ark-r-pill);
  background:var(--ark-surface-2);color:var(--ark-ink-2);font-size:13px;
  transition:background var(--ark-ease),color var(--ark-ease);
}
.ark-chip:hover{background:var(--ark-primary-soft);color:var(--ark-primary);}

/* 移动端汉堡与抽屉 */
.ark-burger{
  display:none;width:44px;height:44px;border:1.5px solid var(--ark-line);background:#fff;
  border-radius:var(--ark-r-s);color:var(--ark-ink);font-size:16px;margin-left:auto;
  align-items:center;justify-content:center;cursor:pointer;
  transition:border-color var(--ark-ease),color var(--ark-ease);
}
.ark-burger:hover{border-color:var(--ark-primary);color:var(--ark-primary);}
.ark-drawer-mask{
  position:fixed;inset:0;background:rgba(11,42,36,.45);z-index:1050;
  opacity:0;visibility:hidden;transition:opacity var(--ark-ease),visibility var(--ark-ease);
}
.ark-drawer-mask.is-open{opacity:1;visibility:visible;}
.ark-drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:1060;
  background:#fff;border-radius:24px 0 0 24px;padding:22px 20px 28px;
  transform:translateX(100%);transition:transform var(--ark-ease);
  display:flex;flex-direction:column;gap:18px;overflow-y:auto;
}
.ark-drawer.is-open{transform:translateX(0);}
.ark-drawer-head{display:flex;align-items:center;justify-content:space-between;}
.ark-drawer-close{
  width:38px;height:38px;border-radius:50%;border:1.5px solid var(--ark-line);background:#fff;
  color:var(--ark-ink-2);cursor:pointer;transition:all var(--ark-ease);
}
.ark-drawer-close:hover{border-color:var(--ark-primary);color:var(--ark-primary);}
.ark-drawer-nav{display:flex;flex-direction:column;gap:2px;}
.ark-drawer-nav a{
  padding:12px 12px;border-radius:var(--ark-r-s);font-size:15px;color:var(--ark-ink);
  border-left:3px solid transparent;transition:all var(--ark-ease);
}
.ark-drawer-nav a:hover{background:var(--ark-primary-soft);color:var(--ark-primary);}
.ark-drawer-nav a.is-active{color:var(--ark-primary);font-weight:700;border-left-color:var(--ark-primary);background:var(--ark-primary-soft);}
.ark-drawer .ark-search{width:100%;}
.ark-drawer .ark-search input{width:100%;}

/* ============ Hero ============ */
.ark-hero{
  position:relative;overflow:hidden;
  padding:64px 0 72px;
  background:
    radial-gradient(560px 420px at 8% 6%,rgba(18,160,133,.10),transparent 68%),
    radial-gradient(520px 400px at 92% 78%,rgba(255,122,69,.10),transparent 70%),
    var(--ark-bg);
}
.ark-hero-grid{
  display:grid;grid-template-columns:1.24fr 1fr;gap:56px;align-items:center;
}
.ark-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 14px;border-radius:var(--ark-r-pill);
  background:var(--ark-primary-soft);color:var(--ark-primary);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;
}
.ark-eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--ark-primary);}
.ark-hero h1{
  font-size:clamp(28px,4.2vw,44px);line-height:1.15;font-weight:800;letter-spacing:-.02em;
  margin:18px 0 16px;
}
.ark-hero h1 .ark-hl{
  background:var(--ark-grad-brand);-webkit-background-clip:text;background-clip:text;color:transparent;
}
.ark-hero-sub{font-size:16.5px;color:var(--ark-ink-2);max-width:34em;line-height:1.85;}
.ark-hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 22px;}
.ark-hero-points{display:flex;flex-wrap:wrap;gap:8px 22px;}
.ark-hero-points li{
  display:inline-flex;align-items:center;gap:7px;font-size:13.5px;color:var(--ark-ink-2);
}
.ark-hero-points i{color:var(--ark-primary);font-size:12px;}

.ark-hero-visual{display:flex;justify-content:center;position:relative;}
.ark-reel{
  position:relative;width:100%;max-width:344px;aspect-ratio:9/16;
  border-radius:var(--ark-r-xl);overflow:hidden;box-shadow:var(--ark-sh-3);
  background:var(--ark-surface-2);
}
.ark-reel img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ark-ease);}
.ark-reel:hover img{transform:scale(1.04);}
.ark-reel::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,42,36,.34) 0%,rgba(11,42,36,0) 32%,rgba(11,42,36,.72) 100%);
}
.ark-reel-tag{
  position:absolute;top:16px;left:16px;z-index:2;
  padding:5px 13px;border-radius:var(--ark-r-pill);
  background:rgba(255,255,255,.92);color:var(--ark-primary);
  font-size:12.5px;font-weight:700;letter-spacing:.02em;
}
.ark-reel-play{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:2;
  width:56px;height:56px;border-radius:50%;background:#fff;color:var(--ark-primary);
  display:flex;align-items:center;justify-content:center;font-size:17px;
  box-shadow:var(--ark-sh-2);transition:transform var(--ark-ease);
}
.ark-reel:hover .ark-reel-play{transform:translate(-50%,-50%) scale(1.08);}
.ark-reel-bottom{position:absolute;left:0;right:0;bottom:0;padding:18px 18px 20px;z-index:2;color:#fff;}
.ark-reel-bottom strong{display:block;font-size:16.5px;line-height:1.45;font-weight:700;}
.ark-reel-bottom span{display:block;font-size:12.5px;color:rgba(255,255,255,.82);margin-top:6px;}
.ark-float-badge{
  position:absolute;top:26px;right:-6px;z-index:3;
  background:#fff;border-radius:var(--ark-r-m);padding:10px 16px;
  box-shadow:var(--ark-sh-2);display:flex;align-items:center;gap:10px;
  border:1px solid var(--ark-line);
}
.ark-float-badge b{font-family:var(--ark-num);font-size:22px;color:var(--ark-accent);line-height:1;}
.ark-float-badge span{font-size:12px;color:var(--ark-ink-2);line-height:1.3;max-width:72px;}

/* ============ 板块通用 ============ */
.ark-section{padding:80px 0;}
.ark-section.alt{background:var(--ark-surface);}
.ark-section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px;
}
.ark-section-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.25;}
.ark-section-head .ark-desc{font-size:14.5px;color:var(--ark-ink-2);margin-top:8px;max-width:46em;}

/* 数据徽章条 */
.ark-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;
  margin-top:-32px;position:relative;z-index:4;
}
.ark-stat{
  background:var(--ark-surface);border:1px solid var(--ark-line);border-radius:var(--ark-r-l);
  padding:18px 20px;box-shadow:var(--ark-sh-1);
  display:flex;align-items:center;gap:14px;
  transition:transform var(--ark-ease),box-shadow var(--ark-ease);
}
.ark-stat:hover{transform:translateY(-4px);box-shadow:var(--ark-sh-2);}
.ark-stat b{
  font-family:var(--ark-num);font-size:30px;line-height:1;color:var(--ark-primary);
  letter-spacing:-.02em;
}
.ark-stat b i{font-style:normal;font-size:14px;color:var(--ark-ink-2);margin-left:2px;}
.ark-stat small{display:block;font-size:12.5px;color:var(--ark-ink-2);line-height:1.45;}
.ark-stat .ark-dot{width:7px;height:7px;border-radius:50%;background:var(--ark-badge);flex:0 0 auto;}

/* 片段卡网格 */
.ark-grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.ark-clip{
  display:flex;flex-direction:column;background:var(--ark-surface);
  border:1px solid var(--ark-line);border-radius:var(--ark-r-l);overflow:hidden;
  box-shadow:var(--ark-sh-1);color:var(--ark-ink);
  transition:transform var(--ark-ease),box-shadow var(--ark-ease),border-color var(--ark-ease);
}
.ark-clip:hover{transform:translateY(-4px);box-shadow:var(--ark-sh-3);border-color:#d9d0c0;color:var(--ark-ink);}
.ark-clip-media{position:relative;aspect-ratio:4/5;overflow:hidden;background:var(--ark-surface-2);}
.ark-clip-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ark-ease);}
.ark-clip:hover .ark-clip-media img{transform:scale(1.04);}
.ark-clip-time{
  position:absolute;right:10px;bottom:10px;
  background:rgba(11,42,36,.78);color:#fff;font-size:12px;font-family:var(--ark-num);
  padding:2px 9px;border-radius:var(--ark-r-pill);letter-spacing:.02em;
}
.ark-clip-body{padding:16px 18px 18px;display:flex;flex-direction:column;gap:10px;flex:1;}
.ark-clip-body h3{font-size:15.5px;line-height:1.5;font-weight:700;transition:color var(--ark-ease);}
.ark-clip:hover .ark-clip-body h3{color:var(--ark-primary);}
.ark-clip-foot{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--ark-ink-2);margin-top:auto;}
.ark-clip-foot i{color:var(--ark-primary);font-size:11px;}

/* 标签 */
.ark-tag{
  display:inline-flex;align-items:center;padding:3px 11px;border-radius:var(--ark-r-pill);
  background:var(--ark-primary-soft);color:var(--ark-primary);
  font-size:12.5px;font-weight:600;letter-spacing:.02em;white-space:nowrap;
}
.ark-tag.accent{background:var(--ark-accent-soft);color:#c9542a;}

/* 最新信息 CMS 卡片 */
.ark-post{
  display:flex;flex-direction:column;height:100%;
  background:var(--ark-surface);border:1px solid var(--ark-line);
  border-radius:var(--ark-r-l);padding:22px 22px 20px;
  box-shadow:var(--ark-sh-1);color:var(--ark-ink);
  transition:transform var(--ark-ease),box-shadow var(--ark-ease),border-color var(--ark-ease);
}
.ark-post:hover{transform:translateY(-4px);box-shadow:var(--ark-sh-2);border-color:#d9d0c0;color:var(--ark-ink);}
.ark-post h3{
  font-size:16.5px;line-height:1.55;font-weight:700;margin:12px 0 10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  transition:color var(--ark-ease);
}
.ark-post:hover h3{color:var(--ark-primary);}
.ark-post p{
  font-size:14px;line-height:1.75;color:var(--ark-ink-2);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.ark-post-foot{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  margin-top:18px;padding-top:14px;border-top:1px solid var(--ark-line);
  font-size:12.5px;color:var(--ark-ink-2);
}
.ark-post-foot .ark-num{letter-spacing:.02em;}
.ark-post-foot i{color:var(--ark-primary);font-size:12px;transition:transform var(--ark-ease);}
.ark-post:hover .ark-post-foot i{transform:translateX(3px);}
.ark-empty{
  border:1.5px dashed #d7cfbf;border-radius:var(--ark-r-l);
  padding:52px 24px;text-align:center;background:var(--ark-surface-2);
  color:var(--ark-ink-2);
}
.ark-empty i{font-size:26px;color:var(--ark-primary);display:block;margin-bottom:12px;}
.ark-empty strong{display:block;font-size:15.5px;color:var(--ark-ink);margin-bottom:6px;font-weight:700;}
.ark-empty span{font-size:13.5px;}

/* 编号清单 */
.ark-list-wrap{max-width:860px;margin:0 auto;}
.ark-numlist{border-top:1px solid var(--ark-line);}
.ark-numlist li{border-bottom:1px solid var(--ark-line);}
.ark-numlist a{
  display:flex;align-items:center;gap:20px;padding:18px 16px;border-radius:var(--ark-r-m);
  color:var(--ark-ink);transition:background var(--ark-ease),color var(--ark-ease);
}
.ark-numlist a:hover{background:var(--ark-surface-2);color:var(--ark-ink);}
.ark-numlist .idx{
  font-family:var(--ark-num);font-size:28px;line-height:1;color:var(--ark-primary);
  min-width:44px;letter-spacing:-.02em;opacity:.85;
}
.ark-numlist .thumb{
  width:72px;height:72px;border-radius:var(--ark-r-m);overflow:hidden;flex:0 0 auto;
  background:var(--ark-surface-2);
}
.ark-numlist .thumb img{width:100%;height:100%;object-fit:cover;}
.ark-numlist .txt{flex:1 1 auto;min-width:0;}
.ark-numlist .txt strong{display:block;font-size:16px;font-weight:700;line-height:1.55;}
.ark-numlist .txt span{display:block;font-size:14px;color:var(--ark-ink-2);margin-top:4px;}
.ark-numlist .go{color:var(--ark-ink-2);font-size:14px;transition:transform var(--ark-ease),color var(--ark-ease);}
.ark-numlist a:hover .go{transform:translateX(4px);color:var(--ark-primary);}

/* 口碑 */
.ark-reviews{
  display:flex;gap:20px;overflow-x:auto;padding:4px 4px 18px;
  scroll-snap-type:x mandatory;scrollbar-width:none;-ms-overflow-style:none;
}
.ark-reviews::-webkit-scrollbar{display:none;}
.ark-review{
  flex:0 0 288px;scroll-snap-align:start;
  background:var(--ark-surface);border:1px solid var(--ark-line);border-radius:var(--ark-r-l);
  padding:20px;box-shadow:var(--ark-sh-1);
  transition:transform var(--ark-ease),box-shadow var(--ark-ease);
}
.ark-review:hover{transform:translateY(-4px);box-shadow:var(--ark-sh-2);}
.ark-review-head{display:flex;align-items:center;gap:12px;margin-bottom:12px;}
.ark-avatar{
  width:40px;height:40px;border-radius:50%;flex:0 0 auto;
  background:var(--ark-grad-brand);color:#fff;display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;
}
.ark-review-head strong{font-size:14.5px;display:block;line-height:1.4;}
.ark-review-head small{font-size:12px;color:var(--ark-ink-2);}
.ark-review p{
  font-size:14px;line-height:1.75;color:var(--ark-ink-2);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.ark-review-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:14px;}
.ark-review-tags span{
  font-size:11.5px;padding:2px 10px;border-radius:var(--ark-r-pill);
  background:var(--ark-surface-2);color:var(--ark-ink-2);
}

/* CTA 大卡 */
.ark-cta{
  position:relative;overflow:hidden;
  background:var(--ark-grad-brand);border-radius:var(--ark-r-xl);
  padding:48px;display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:var(--ark-sh-2);
}
.ark-cta::before,.ark-cta::after{
  content:"";position:absolute;border-radius:50%;border:1.5px solid rgba(255,255,255,.22);
}
.ark-cta::before{width:220px;height:220px;right:-60px;top:-90px;}
.ark-cta::after{width:150px;height:150px;right:80px;bottom:-90px;border-color:rgba(255,255,255,.14);}
.ark-cta h2{color:#fff;font-size:clamp(21px,2.4vw,28px);line-height:1.3;position:relative;z-index:2;}
.ark-cta p{color:rgba(255,255,255,.86);font-size:15px;margin-top:10px;position:relative;z-index:2;max-width:38em;}
.ark-cta .ark-cta-btn{position:relative;z-index:2;flex:0 0 auto;}

/* FAQ */
.ark-faq{max-width:880px;margin:0 auto;}
.ark-faq-item{
  background:var(--ark-surface);border:1px solid var(--ark-line);border-radius:var(--ark-r-m);
  margin-bottom:12px;overflow:hidden;transition:box-shadow var(--ark-ease),border-color var(--ark-ease);
}
.ark-faq-item:hover{border-color:#d9d0c0;box-shadow:var(--ark-sh-1);}
.ark-faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:transparent;border:0;text-align:left;cursor:pointer;
  font-size:15.5px;font-weight:600;color:var(--ark-ink);
  transition:color var(--ark-ease);
}
.ark-faq-q:hover{color:var(--ark-primary);}
.ark-faq-q .ico{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  background:var(--ark-primary-soft);color:var(--ark-primary);
  display:flex;align-items:center;justify-content:center;font-size:11px;
  transition:transform var(--ark-ease),background var(--ark-ease),color var(--ark-ease);
}
.ark-faq-q[aria-expanded="true"]{color:var(--ark-primary);}
.ark-faq-q[aria-expanded="true"] .ico{transform:rotate(180deg);background:var(--ark-primary);color:#fff;}
.ark-faq-a{padding:0 22px 20px;font-size:14.5px;line-height:1.85;color:var(--ark-ink-2);}

/* ============ 页脚 ============ */
.ark-footer{background:var(--ark-dark);color:rgba(255,255,255,.72);padding:64px 0 0;}
.ark-footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.ark-footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;letter-spacing:.02em;}
.ark-footer p{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.66);}
.ark-footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.ark-footer-brand .ark-logo-mark{box-shadow:none;background:rgba(255,255,255,.14);}
.ark-footer-brand strong{color:#fff;font-size:16px;font-weight:800;}
.ark-footer-brand em{display:block;font-style:normal;font-size:11px;color:rgba(255,255,255,.55);letter-spacing:.06em;}
.ark-footer ul{display:flex;flex-direction:column;gap:10px;}
.ark-footer ul a{font-size:13.5px;color:rgba(255,255,255,.72);transition:color var(--ark-ease),padding-left var(--ark-ease);}
.ark-footer ul a:hover{color:#fff;padding-left:4px;}
.ark-footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  font-size:12.5px;color:rgba(255,255,255,.5);
}
.ark-footer-bottom .ark-disclaim{font-size:12px;color:rgba(255,255,255,.42);line-height:1.7;max-width:56em;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .ark-container{max-width:1140px;}
  .ark-grid-4{grid-template-columns:repeat(3,1fr);}
  .ark-footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .ark-footer-grid > div:last-child{grid-column:1/-1;}
}
@media (max-width:991px){
  .ark-nav{display:none;}
  .ark-head-inner .ark-search{display:none;}
  .ark-head-inner > .ark-btn{display:none;}
  .ark-burger{display:inline-flex;}
  .ark-hero{padding:48px 0 56px;}
  .ark-hero-grid{grid-template-columns:1fr;gap:36px;}
  .ark-hero-visual{order:-1;}
  .ark-reel{max-width:280px;max-height:60vh;}
  .ark-float-badge{right:auto;left:calc(50% + 56px);top:12px;}
  .ark-stats{grid-template-columns:repeat(2,1fr);margin-top:-24px;}
  .ark-grid-4{grid-template-columns:repeat(2,1fr);}
  .ark-section{padding:64px 0;}
  .ark-cta{padding:36px;flex-direction:column;align-items:flex-start;}
  .ark-footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .ark-footer-grid > div:last-child{grid-column:auto;}
  .ark-section-head{flex-direction:column;align-items:flex-start;gap:12px;}
}
@media (max-width:767px){
  .ark-container{padding:0 16px;}
  body{font-size:15px;}
  .ark-head-top{height:64px;}
  .ark-header.is-stuck .ark-head-top{height:56px;}
  .ark-logo-text strong{font-size:15px;}
  .ark-hero h1{margin:14px 0 12px;}
  .ark-hero-actions{margin:22px 0 18px;}
  .ark-grid-4{grid-template-columns:1fr;gap:16px;}
  .ark-numlist a{gap:12px;padding:16px 8px;}
  .ark-numlist .idx{font-size:22px;min-width:32px;}
  .ark-numlist .thumb{width:60px;height:60px;}
  .ark-numlist .txt strong{font-size:15px;}
  .ark-cta{padding:28px 22px;border-radius:var(--ark-r-l);}
  .ark-section{padding:48px 0;}
  .ark-stat b{font-size:24px;}
  .ark-review{flex:0 0 82vw;}
  .ark-footer{padding:48px 0 0;}
  .ark-footer-grid{grid-template-columns:1fr;gap:28px;}
  .ark-footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:519px){
  .ark-stats{grid-template-columns:1fr;}
  .ark-hero-actions .ark-btn{width:100%;}
  .ark-float-badge{padding:8px 12px;gap:8px;}
  .ark-float-badge b{font-size:18px;}
}

/* roulang page: article */
:root{
  --ark-primary:#0E7C66;
  --ark-primary-2:#12A085;
  --ark-primary-soft:#E3F3EE;
  --ark-accent:#FF7A45;
  --ark-accent-soft:#FFEDE4;
  --ark-badge:#FFC53D;
  --ark-ink:#16221F;
  --ark-ink-2:#5A6B66;
  --ark-line:#E8E2D7;
  --ark-bg:#FBF8F3;
  --ark-surface:#FFFFFF;
  --ark-surface-2:#F4EFE6;
  --ark-dark:#0B2A24;
  --ark-grad-brand:linear-gradient(135deg,#0E7C66 0%,#12A085 55%,#3FC79E 100%);
  --ark-grad-warm:linear-gradient(135deg,#FF7A45 0%,#FFB27A 100%);
  --ark-r-s:10px;
  --ark-r-m:16px;
  --ark-r-l:22px;
  --ark-r-xl:28px;
  --ark-r-pill:999px;
  --ark-sh-1:0 2px 8px rgba(16,52,45,.05);
  --ark-sh-2:0 10px 28px rgba(16,52,45,.09);
  --ark-sh-3:0 18px 44px rgba(16,52,45,.14);
  --ark-focus:0 0 0 4px rgba(18,160,133,.22);
  --ark-ease:.22s cubic-bezier(.2,.7,.3,1);
  --ark-font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ark-num:"DIN Alternate","Bahnschrift",ui-monospace,"SF Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px;}
body{margin:0;font-family:var(--ark-font);font-size:16px;line-height:1.8;color:var(--ark-ink);background:var(--ark-bg);-webkit-font-smoothing:antialiased;}
img{max-width:100%;display:block;}
a{color:var(--ark-primary);text-decoration:none;transition:color var(--ark-ease),background-color var(--ark-ease),border-color var(--ark-ease);}
a:hover{color:var(--ark-primary-2);}
button,input{font-family:inherit;}
h1,h2,h3,h4,h5{margin:0;color:var(--ark-ink);}
p{margin:0 0 16px;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:none;box-shadow:var(--ark-focus);}
.ark-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.ark-num{font-family:var(--ark-num);font-variant-numeric:tabular-nums;}

/* ============ 头部 ============ */
.ark-header{position:sticky;top:0;z-index:1030;background:rgba(251,248,243,.92);border-bottom:1px solid var(--ark-line);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);transition:box-shadow var(--ark-ease);}
.ark-header.is-scrolled{box-shadow:var(--ark-sh-1);}
.ark-topbar-inner{display:flex;align-items:center;gap:20px;height:72px;transition:height var(--ark-ease);}
.ark-header.is-scrolled .ark-topbar-inner{height:56px;}
.ark-brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ark-ink);}
.ark-brand:hover{color:var(--ark-ink);}
.ark-logo-mark{width:38px;height:38px;border-radius:12px;background:var(--ark-grad-brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;box-shadow:var(--ark-sh-1);flex:0 0 auto;}
.ark-brand-text{display:flex;flex-direction:column;line-height:1.15;}
.ark-brand-text strong{font-size:16px;font-weight:800;letter-spacing:.01em;}
.ark-brand-text em{font-style:normal;font-size:11px;color:var(--ark-ink-2);letter-spacing:.04em;}
.ark-nav{display:flex;align-items:center;gap:4px;margin-left:auto;}
.ark-nav a{position:relative;padding:8px 12px;font-size:14.5px;font-weight:500;color:var(--ark-ink-2);border-radius:var(--ark-r-s);white-space:nowrap;}
.ark-nav a:hover{color:var(--ark-primary);background:var(--ark-primary-soft);}
.ark-nav a.is-active{color:var(--ark-primary);font-weight:700;}
.ark-nav a.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:3px;border-radius:3px;background:var(--ark-primary);}
.ark-actions{display:flex;align-items:center;gap:12px;}
.ark-search{display:flex;align-items:center;gap:8px;background:var(--ark-surface-2);border:1.5px solid transparent;border-radius:var(--ark-r-pill);height:44px;padding:0 16px;transition:var(--ark-ease);}
.ark-search:focus-within{background:#fff;border-color:var(--ark-primary);box-shadow:var(--ark-focus);}
.ark-search i{font-size:13px;color:var(--ark-ink-2);}
.ark-search input{border:none;background:transparent;outline:none;font-size:14px;width:148px;color:var(--ark-ink);}
.ark-search input::placeholder{color:#9AA8A3;}
.ark-burger{display:none;width:44px;height:44px;border-radius:14px;border:1.5px solid var(--ark-line);background:#fff;color:var(--ark-ink);align-items:center;justify-content:center;font-size:17px;cursor:pointer;transition:var(--ark-ease);}
.ark-burger:hover{border-color:var(--ark-primary);color:var(--ark-primary);}
.ark-hotbar{max-height:48px;overflow:hidden;border-top:1px solid var(--ark-line);opacity:1;transition:max-height var(--ark-ease),opacity var(--ark-ease);}
.ark-header.is-scrolled .ark-hotbar{max-height:0;opacity:0;border-top-color:transparent;}
.ark-hotbar-inner{display:flex;align-items:center;gap:8px;padding:8px 0;overflow-x:auto;scrollbar-width:none;}
.ark-hotbar-inner::-webkit-scrollbar{display:none;}
.ark-hotbar-label{flex:0 0 auto;font-size:12.5px;color:var(--ark-ink-2);letter-spacing:.02em;padding-right:4px;}
.ark-chip{flex:0 0 auto;font-size:13px;padding:5px 14px;border-radius:var(--ark-r-pill);background:var(--ark-surface-2);color:var(--ark-ink-2);white-space:nowrap;transition:var(--ark-ease);}
.ark-chip:hover{background:var(--ark-primary-soft);color:var(--ark-primary);}

/* ============ 按钮 ============ */
.ark-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 26px;border-radius:var(--ark-r-pill);border:1.5px solid transparent;font-size:15px;font-weight:600;cursor:pointer;transition:var(--ark-ease);}
.ark-btn-primary{background:var(--ark-grad-brand);color:#fff;box-shadow:var(--ark-sh-1);}
.ark-btn-primary:hover{color:#fff;box-shadow:var(--ark-sh-2);filter:brightness(1.05);transform:translateY(-1px);}
.ark-btn-primary:active{transform:translateY(0);box-shadow:var(--ark-sh-1);}
.ark-btn-ghost{background:#fff;border-color:var(--ark-line);color:var(--ark-primary);}
.ark-btn-ghost:hover{border-color:var(--ark-primary);color:var(--ark-primary);box-shadow:var(--ark-sh-1);}
.ark-btn-sm{height:40px;padding:0 18px;font-size:14px;}
.ark-btn-block{display:flex;width:100%;}
.ark-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--ark-primary);}
.ark-link i{transition:transform var(--ark-ease);}
.ark-link:hover i{transform:translateX(3px);}

/* ============ 抽屉 ============ */
.ark-mask{position:fixed;inset:0;background:rgba(11,42,36,.42);opacity:0;visibility:hidden;transition:var(--ark-ease);z-index:1050;}
.ark-mask.is-open{opacity:1;visibility:visible;}
.ark-drawer{position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;background:#fff;z-index:1060;transform:translateX(102%);transition:transform .28s cubic-bezier(.2,.7,.3,1);border-radius:24px 0 0 24px;padding:20px;display:flex;flex-direction:column;gap:18px;overflow-y:auto;}
.ark-drawer.is-open{transform:translateX(0);}
.ark-drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.ark-drawer-close{width:38px;height:38px;border-radius:12px;border:1.5px solid var(--ark-line);background:#fff;color:var(--ark-ink);cursor:pointer;font-size:16px;transition:var(--ark-ease);}
.ark-drawer-close:hover{border-color:var(--ark-primary);color:var(--ark-primary);}
.ark-drawer-nav{display:flex;flex-direction:column;gap:4px;}
.ark-drawer-nav a{padding:13px 14px;border-radius:var(--ark-r-s);font-size:15px;font-weight:600;color:var(--ark-ink);border-left:3px solid transparent;}
.ark-drawer-nav a:hover,.ark-drawer-nav a.is-active{background:var(--ark-primary-soft);color:var(--ark-primary);border-left-color:var(--ark-primary);}

/* ============ 面包屑 / 文章头 ============ */
.ark-main{padding-bottom:80px;}
.ark-crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--ark-ink-2);padding:26px 0 0;}
.ark-crumb a{color:var(--ark-ink-2);}
.ark-crumb a:hover{color:var(--ark-primary);text-decoration:underline;text-underline-offset:3px;}
.ark-crumb .sep{opacity:.45;}
.ark-crumb .cur{color:var(--ark-ink);}
.ark-art-head{padding:22px 0 26px;border-bottom:1px solid var(--ark-line);}
.ark-tag{display:inline-flex;align-items:center;gap:6px;background:var(--ark-primary-soft);color:var(--ark-primary);font-size:12.5px;font-weight:600;letter-spacing:.02em;padding:5px 14px;border-radius:var(--ark-r-pill);}
.ark-art-head h1{margin:18px 0 16px;font-size:clamp(26px,3.4vw,36px);line-height:1.28;font-weight:800;letter-spacing:-.02em;}
.ark-meta{display:flex;flex-wrap:wrap;align-items:center;gap:20px;font-size:12.5px;color:var(--ark-ink-2);}
.ark-meta span{display:inline-flex;align-items:center;gap:6px;}
.ark-meta i{color:var(--ark-primary-2);}
.ark-meta .ark-num{font-size:13px;}

/* ============ 布局 ============ */
.ark-art-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start;padding-top:40px;}
.ark-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px;}
.ark-card{background:var(--ark-surface);border:1px solid var(--ark-line);border-radius:var(--ark-r-l);box-shadow:var(--ark-sh-1);padding:22px;}
.ark-card h3{font-size:15.5px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.ark-card h3 i{color:var(--ark-primary);font-size:14px;}
.ark-toc{display:flex;flex-direction:column;gap:2px;}
.ark-toc a{display:block;padding:8px 12px;font-size:14px;color:var(--ark-ink-2);border-left:2px solid var(--ark-line);border-radius:0 8px 8px 0;line-height:1.55;}
.ark-toc a:hover{color:var(--ark-primary);background:var(--ark-primary-soft);border-left-color:var(--ark-primary);}
.ark-side-list{display:flex;flex-direction:column;gap:14px;}
.ark-side-item{display:flex;gap:12px;align-items:flex-start;}
.ark-side-item .idx{font-family:var(--ark-num);font-variant-numeric:tabular-nums;font-size:15px;font-weight:700;color:var(--ark-accent);flex:0 0 auto;line-height:1.5;}
.ark-side-item a{font-size:14px;font-weight:600;color:var(--ark-ink);line-height:1.55;}
.ark-side-item a:hover{color:var(--ark-primary);}
.ark-side-item p{font-size:12.5px;color:var(--ark-ink-2);margin:4px 0 0;line-height:1.6;}

/* ============ 正文 ============ */
.ark-prose{font-size:16px;line-height:1.9;color:var(--ark-ink);max-width:760px;overflow-wrap:break-word;}
.ark-prose > *:first-child{margin-top:0;}
.ark-prose p{margin:0 0 18px;}
.ark-prose h2{position:relative;font-size:clamp(20px,2.2vw,24px);line-height:1.4;font-weight:700;margin:40px 0 16px;padding-left:16px;border-left:4px solid var(--ark-primary);}
.ark-prose h3{font-size:19px;line-height:1.45;font-weight:700;margin:30px 0 12px;}
.ark-prose h4{font-size:17px;line-height:1.5;font-weight:600;margin:24px 0 10px;}
.ark-prose ul,.ark-prose ol{margin:0 0 18px;}
.ark-prose ul li{position:relative;padding-left:22px;margin-bottom:8px;}
.ark-prose ul li::before{content:"";position:absolute;left:4px;top:12px;width:7px;height:7px;border-radius:50%;background:var(--ark-primary);}
.ark-prose ol{counter-reset:arkol;}
.ark-prose ol li{position:relative;padding-left:26px;margin-bottom:8px;counter-increment:arkol;}
.ark-prose ol li::before{content:counter(arkol) ".";position:absolute;left:0;top:0;font-family:var(--ark-num);font-weight:700;color:var(--ark-primary);}
.ark-prose blockquote{margin:24px 0;padding:16px 20px;background:var(--ark-primary-soft);border-left:4px solid var(--ark-primary);border-radius:0 var(--ark-r-m) var(--ark-r-m) 0;color:#0C5A4A;font-size:15.5px;}
.ark-prose blockquote p:last-child{margin-bottom:0;}
.ark-prose img{border-radius:var(--ark-r-m);margin:22px 0;box-shadow:var(--ark-sh-1);}
.ark-prose figure{margin:22px 0;}
.ark-prose figcaption{font-size:13px;color:var(--ark-ink-2);text-align:center;margin-top:10px;}
.ark-prose a{color:var(--ark-primary);text-decoration:underline;text-underline-offset:3px;}
.ark-prose a:hover{color:var(--ark-primary-2);}
.ark-prose strong{font-weight:700;}
.ark-prose hr{border:none;border-top:1px solid var(--ark-line);margin:36px 0;}
.ark-prose table{display:block;width:100%;overflow-x:auto;border-collapse:collapse;font-size:14.5px;margin:22px 0;border:1px solid var(--ark-line);border-radius:var(--ark-r-m);}
.ark-prose th,.ark-prose td{padding:11px 15px;border-bottom:1px solid var(--ark-line);text-align:left;white-space:nowrap;}
.ark-prose th{background:var(--ark-surface-2);font-weight:700;color:var(--ark-ink);}
.ark-prose tr:last-child td{border-bottom:none;}

.ark-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;padding:64px 24px;border:1.5px dashed var(--ark-line);border-radius:var(--ark-r-l);background:var(--ark-surface);text-align:center;}
.ark-empty i{font-size:30px;color:var(--ark-primary-2);}
.ark-empty h3{font-size:18px;font-weight:700;}
.ark-empty p{font-size:14px;color:var(--ark-ink-2);margin:0;}

/* ============ 上下篇 / 相关 ============ */
.ark-pager{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:44px;max-width:760px;}
.ark-pager a{display:flex;flex-direction:column;gap:6px;background:var(--ark-surface);border:1px solid var(--ark-line);border-radius:var(--ark-r-m);padding:16px 20px;transition:var(--ark-ease);}
.ark-pager a:hover{border-color:var(--ark-primary);box-shadow:var(--ark-sh-2);transform:translateY(-2px);}
.ark-pager span{font-size:12.5px;color:var(--ark-ink-2);letter-spacing:.02em;}
.ark-pager strong{font-size:15px;font-weight:700;color:var(--ark-ink);line-height:1.5;}
.ark-pager a:hover strong{color:var(--ark-primary);}
.ark-sec{padding-top:64px;}
.ark-sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:24px;}
.ark-sec-head h2{font-size:clamp(21px,2.4vw,26px);font-weight:700;line-height:1.3;}
.ark-sec-head p{font-size:14px;color:var(--ark-ink-2);margin:8px 0 0;}
.ark-related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.ark-post-card{display:flex;flex-direction:column;height:100%;background:var(--ark-surface);border:1px solid var(--ark-line);border-radius:var(--ark-r-l);overflow:hidden;box-shadow:var(--ark-sh-1);transition:transform var(--ark-ease),box-shadow var(--ark-ease),border-color var(--ark-ease);}
.ark-post-card:hover{transform:translateY(-4px);box-shadow:var(--ark-sh-3);border-color:#DCD3C3;}
.ark-post-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--ark-surface-2);}
.ark-post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s cubic-bezier(.2,.7,.3,1);}
.ark-post-card:hover .ark-post-thumb img{transform:scale(1.04);}
.ark-post-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.ark-post-body h3{font-size:16.5px;font-weight:700;line-height:1.5;}
.ark-post-body h3 a{color:var(--ark-ink);}
.ark-post-card:hover .ark-post-body h3 a{color:var(--ark-primary);}
.ark-post-body p{font-size:13.5px;color:var(--ark-ink-2);line-height:1.75;margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.ark-post-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--ark-ink-2);}
.ark-post-foot .ark-num{font-size:12.5px;}
.ark-post-foot i{color:var(--ark-primary);transition:transform var(--ark-ease);}
.ark-post-card:hover .ark-post-foot i{transform:translateX(3px);}

/* ============ CTA ============ */
.ark-cta{position:relative;overflow:hidden;margin-top:64px;padding:48px;border-radius:var(--ark-r-xl);background:var(--ark-grad-brand);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:32px;box-shadow:var(--ark-sh-2);}
.ark-cta h2{color:#fff;font-size:clamp(20px,2.4vw,26px);font-weight:800;line-height:1.3;}
.ark-cta p{color:rgba(255,255,255,.86);font-size:14.5px;margin:10px 0 0;max-width:520px;}
.ark-cta .ark-btn{background:#fff;color:var(--ark-primary);flex:0 0 auto;box-shadow:var(--ark-sh-2);}
.ark-cta .ark-btn:hover{color:var(--ark-primary);background:#fff;transform:translateY(-2px);}
.ark-cta::before,.ark-cta::after{content:"";position:absolute;border-radius:50%;border:2px solid rgba(255,255,255,.18);pointer-events:none;}
.ark-cta::before{width:220px;height:220px;right:-70px;top:-90px;}
.ark-cta::after{width:130px;height:130px;right:70px;bottom:-80px;}

/* ============ 页脚 ============ */
.ark-footer{background:var(--ark-dark);color:rgba(255,255,255,.72);padding:64px 0 28px;margin-top:80px;font-size:14px;}
.ark-footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;}
.ark-footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px;}
.ark-footer p{line-height:1.85;margin:0;}
.ark-footer ul{display:flex;flex-direction:column;gap:10px;}
.ark-footer ul a{color:rgba(255,255,255,.72);font-size:14px;}
.ark-footer ul a:hover{color:#fff;}
.ark-footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.ark-footer-brand .ark-logo-mark{box-shadow:none;}
.ark-footer-brand strong{display:block;color:#fff;font-size:16px;font-weight:800;line-height:1.2;}
.ark-footer-brand em{display:block;font-style:normal;font-size:11px;color:rgba(255,255,255,.6);letter-spacing:.04em;}
.ark-footer-bottom{margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:12.5px;color:rgba(255,255,255,.58);}
.ark-disclaim{max-width:680px;line-height:1.7;}

/* ============ 返回顶部 ============ */
.ark-top{position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:50%;border:1px solid var(--ark-line);background:#fff;color:var(--ark-primary);box-shadow:var(--ark-sh-2);cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:var(--ark-ease);z-index:1020;}
.ark-top.is-show{opacity:1;visibility:visible;transform:translateY(0);}
.ark-top:hover{background:var(--ark-primary);color:#fff;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .ark-art-layout{grid-template-columns:1fr;gap:32px;}
  .ark-side{position:static;}
  .ark-prose{max-width:100%;}
}
@media (max-width:991px){
  .ark-footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .ark-related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .ark-cta{flex-direction:column;align-items:flex-start;padding:40px;}
}
@media (max-width:991px){
  .ark-nav{display:none;}
  .ark-burger{display:inline-flex;}
  .ark-search{display:none;}
}
@media (max-width:767px){
  .ark-container{padding:0 16px;}
  .ark-topbar-inner{height:64px;gap:12px;}
  .ark-header.is-scrolled .ark-topbar-inner{height:56px;}
  .ark-brand-text strong{font-size:15px;}
  .ark-actions .ark-btn{display:none;}
  .ark-main{padding-bottom:56px;}
  .ark-crumb{padding-top:18px;font-size:13px;}
  .ark-art-head{padding:18px 0 22px;}
  .ark-meta{gap:14px;}
  .ark-art-layout{padding-top:28px;}
  .ark-prose{font-size:15px;line-height:1.85;}
  .ark-prose h2{margin-top:32px;}
  .ark-related-grid{grid-template-columns:1fr;}
  .ark-pager{grid-template-columns:1fr;}
  .ark-cta{padding:32px 24px;margin-top:48px;}
  .ark-cta .ark-btn{width:100%;}
  .ark-footer{padding:44px 0 22px;margin-top:56px;}
  .ark-footer-grid{grid-template-columns:1fr;gap:28px;}
  .ark-sec{padding-top:48px;}
  .ark-top{right:16px;bottom:18px;}
}
@media (max-width:575px){
  .ark-art-head h1{font-size:24px;}
  .ark-meta{gap:12px;font-size:12px;}
}

/* roulang page: category1 */
:root{
  --ark-primary:#0E7C66;
  --ark-primary-2:#12A085;
  --ark-primary-soft:#E3F3EE;
  --ark-accent:#FF7A45;
  --ark-accent-soft:#FFEDE4;
  --ark-badge:#FFC53D;
  --ark-ink:#16221F;
  --ark-ink-2:#5A6B66;
  --ark-line:#E8E2D7;
  --ark-bg:#FBF8F3;
  --ark-surface:#FFFFFF;
  --ark-surface-2:#F4EFE6;
  --ark-dark:#0B2A24;
  --ark-grad-brand:linear-gradient(135deg,#0E7C66 0%,#12A085 55%,#3FC79E 100%);
  --ark-grad-warm:linear-gradient(135deg,#FF7A45 0%,#FFB27A 100%);
  --ark-font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ark-num:"DIN Alternate","Bahnschrift",ui-monospace,"SF Mono",Menlo,monospace;
  --ark-r-s:10px;
  --ark-r-m:16px;
  --ark-r-l:22px;
  --ark-r-xl:28px;
  --ark-r-pill:999px;
  --ark-sh-1:0 2px 8px rgba(16,52,45,.05);
  --ark-sh-2:0 10px 28px rgba(16,52,45,.09);
  --ark-sh-3:0 18px 44px rgba(16,52,45,.14);
  --ark-focus:0 0 0 4px rgba(18,160,133,.22);
  --ark-ease:.22s cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--ark-font);
  font-size:16px;
  line-height:1.8;
  color:var(--ark-ink);
  background:var(--ark-bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;display:block;border:0}
a{color:var(--ark-primary);text-decoration:none;transition:color var(--ark-ease),background var(--ark-ease),border-color var(--ark-ease),transform var(--ark-ease)}
a:hover{color:var(--ark-primary-2)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button{font-family:inherit}
:where(a,button,input,textarea,summary,[tabindex]):focus-visible{outline:none;box-shadow:var(--ark-focus);border-radius:10px}
.ark-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
@media (min-width:1400px){.ark-container{max-width:1280px}}
@media (max-width:768px){.ark-container{padding:0 16px}}

/* ============ 顶部导航 ============ */
.ark-header{
  position:sticky;top:0;z-index:60;
  background:rgba(251,248,243,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--ark-line);
  transition:box-shadow var(--ark-ease);
}
.ark-header.is-scrolled{box-shadow:var(--ark-sh-1)}
.ark-topbar-inner{
  display:flex;align-items:center;gap:18px;
  height:72px;
  transition:height var(--ark-ease);
}
.ark-header.is-scrolled .ark-topbar-inner{height:56px}
.ark-brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.ark-logo-mark{
  width:40px;height:40px;flex-shrink:0;
  display:inline-flex;align-items:center;justify-content:center;
  border-radius:13px;
  background:var(--ark-grad-brand);
  color:#fff;font-size:20px;font-weight:800;line-height:1;
  box-shadow:var(--ark-sh-1);
}
.ark-brand-text{display:flex;flex-direction:column;line-height:1.15}
.ark-brand-text strong{font-size:16px;font-weight:800;color:var(--ark-ink);letter-spacing:.01em}
.ark-brand-text em{font-style:normal;font-size:11px;color:var(--ark-ink-2);letter-spacing:.06em;margin-top:3px}
.ark-nav-wrap{margin-left:auto}
.ark-nav{display:flex;align-items:center;gap:2px}
.ark-nav a{
  position:relative;
  padding:8px 11px;
  border-radius:8px;
  font-size:14.5px;
  font-weight:500;
  color:var(--ark-ink-2);
  white-space:nowrap;
  transition:color var(--ark-ease),background var(--ark-ease);
}
.ark-nav a:hover{color:var(--ark-primary);background:var(--ark-primary-soft)}
.ark-nav a.is-active{color:var(--ark-primary);font-weight:700;background:transparent}
.ark-nav a.is-active::after{
  content:"";position:absolute;left:11px;right:11px;bottom:0;
  height:3px;border-radius:3px;background:var(--ark-primary);
}
.ark-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.ark-search{position:relative;display:flex;align-items:center}
.ark-search input{
  width:196px;height:40px;
  padding:0 40px 0 16px;
  border:1px solid transparent;
  border-radius:var(--ark-r-pill);
  background:var(--ark-surface-2);
  font-size:14px;color:var(--ark-ink);
  transition:border-color var(--ark-ease),background var(--ark-ease),box-shadow var(--ark-ease);
}
.ark-search input::placeholder{color:#8B9A95}
.ark-search input:focus{
  outline:none;background:#fff;
  border-color:var(--ark-primary);
  box-shadow:var(--ark-focus);
}
.ark-search button{
  position:absolute;right:6px;top:50%;transform:translateY(-50%);
  width:30px;height:30px;border:0;border-radius:50%;
  background:transparent;color:var(--ark-ink-2);
  display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;transition:color var(--ark-ease),background var(--ark-ease);
}
.ark-search button:hover{color:var(--ark-primary);background:var(--ark-primary-soft)}
.ark-burger{
  display:none;
  width:42px;height:42px;border:1px solid var(--ark-line);border-radius:12px;
  background:#fff;color:var(--ark-ink);
  align-items:center;justify-content:center;cursor:pointer;
  transition:border-color var(--ark-ease),color var(--ark-ease);
}
.ark-burger:hover{border-color:var(--ark-primary);color:var(--ark-primary)}
.ark-hotbar{border-top:1px solid rgba(232,226,215,.7);overflow:hidden;max-height:46px;transition:max-height var(--ark-ease),opacity var(--ark-ease)}
.ark-header.is-scrolled .ark-hotbar{max-height:0;opacity:0}
.ark-hotbar-inner{display:flex;align-items:center;gap:10px;height:46px;overflow-x:auto;scrollbar-width:none}
.ark-hotbar-inner::-webkit-scrollbar{display:none}
.ark-hot-label{font-size:12.5px;color:var(--ark-ink-2);letter-spacing:.08em;flex-shrink:0}
.ark-chip{
  flex-shrink:0;
  display:inline-flex;align-items:center;
  padding:5px 13px;border-radius:var(--ark-r-pill);
  background:var(--ark-surface-2);
  font-size:13px;color:var(--ark-ink-2);
  border:1px solid transparent;
  transition:all var(--ark-ease);
}
.ark-chip:hover{background:var(--ark-primary-soft);color:var(--ark-primary);border-color:rgba(14,124,102,.14)}

/* ============ 按钮 ============ */
.ark-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;
  border-radius:var(--ark-r-pill);
  border:1.5px solid transparent;
  font-size:15px;font-weight:700;
  cursor:pointer;
  transition:transform var(--ark-ease),box-shadow var(--ark-ease),background var(--ark-ease),border-color var(--ark-ease),color var(--ark-ease);
}
.ark-btn-primary{background:var(--ark-grad-brand);color:#fff;box-shadow:var(--ark-sh-1)}
.ark-btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:var(--ark-sh-2)}
.ark-btn-primary:active{transform:translateY(0);box-shadow:var(--ark-sh-1)}
.ark-btn-outline{background:#fff;border-color:var(--ark-line);color:var(--ark-primary)}
.ark-btn-outline:hover{border-color:var(--ark-primary);color:var(--ark-primary);background:var(--ark-primary-soft)}
.ark-btn-light{background:#fff;color:var(--ark-primary)}
.ark-btn-light:hover{color:var(--ark-primary);transform:translateY(-2px);box-shadow:var(--ark-sh-2)}
.ark-btn-sm{height:40px;padding:0 18px;font-size:14px}
.ark-link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;color:var(--ark-primary)}
.ark-link-arrow svg{transition:transform var(--ark-ease)}
.ark-link-arrow:hover svg{transform:translateX(3px)}

/* ============ 通用板块 ============ */
.ark-section{padding:80px 0}
.ark-section-alt{background:var(--ark-surface-2)}
.ark-section-head{max-width:720px;margin-bottom:40px}
.ark-section-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3;font-weight:700;letter-spacing:-.01em}
.ark-section-head p{margin-top:12px;color:var(--ark-ink-2);font-size:15.5px;max-width:640px}
.ark-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:5px 13px;border-radius:var(--ark-r-pill);
  background:var(--ark-primary-soft);color:var(--ark-primary);
  font-size:12.5px;font-weight:700;letter-spacing:.04em;margin-bottom:16px;
}
.ark-dot{width:7px;height:7px;border-radius:50%;background:var(--ark-primary);display:inline-block}

/* ============ 分类横幅 ============ */
.ark-page-hero{
  position:relative;overflow:hidden;
  padding:56px 0 72px;
  background:linear-gradient(135deg,#E3F3EE 0%,#F4F8F2 46%,#FFF3EB 100%);
  border-bottom:1px solid rgba(232,226,215,.8);
}
.ark-page-hero::before,
.ark-page-hero::after{
  content:"";position:absolute;border-radius:50%;pointer-events:none;
}
.ark-page-hero::before{
  width:460px;height:460px;right:-140px;top:-180px;
  background:radial-gradient(circle,rgba(18,160,133,.16),rgba(18,160,133,0) 68%);
}
.ark-page-hero::after{
  width:380px;height:380px;left:-160px;bottom:-190px;
  background:radial-gradient(circle,rgba(255,122,69,.14),rgba(255,122,69,0) 70%);
}
.ark-hero-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.08fr .92fr;gap:52px;align-items:center;
}
.ark-hero-copy h1{
  font-size:clamp(28px,4.2vw,42px);
  line-height:1.16;
  font-weight:800;
  letter-spacing:-.02em;
  margin-top:4px;
}
.ark-hero-copy h1 .ark-hero-key{color:var(--ark-primary)}
.ark-hero-copy .ark-sub{
  margin-top:18px;font-size:16.5px;line-height:1.85;color:var(--ark-ink-2);
  max-width:600px;
}
.ark-hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.ark-trust{display:flex;flex-wrap:wrap;gap:22px;margin-top:28px}
.ark-trust span{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13.5px;color:var(--ark-ink-2);
}
.ark-trust svg{flex-shrink:0;color:var(--ark-primary)}

/* 步骤条卡片 */
.ark-flow{
  background:var(--ark-surface);
  border:1px solid var(--ark-line);
  border-radius:var(--ark-r-xl);
  box-shadow:var(--ark-sh-2);
  padding:26px 26px 18px;
}
.ark-flow-title{
  display:flex;align-items:center;justify-content:space-between;
  padding-bottom:14px;border-bottom:1px solid var(--ark-line);
}
.ark-flow-title strong{font-size:16px;font-weight:700}
.ark-flow-title em{
  font-style:normal;font-family:var(--ark-num);font-variant-numeric:tabular-nums;
  font-size:12.5px;color:var(--ark-ink-2);
  background:var(--ark-surface-2);padding:4px 10px;border-radius:var(--ark-r-pill);
}
.ark-flow-item{display:flex;gap:14px;padding:16px 0;border-bottom:1px dashed var(--ark-line)}
.ark-flow-item:last-child{border-bottom:0;padding-bottom:4px}
.ark-flow-num{
  flex-shrink:0;width:34px;height:34px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--ark-grad-brand);color:#fff;
  font-family:var(--ark-num);font-variant-numeric:tabular-nums;
  font-size:14px;font-weight:700;
}
.ark-flow-item h3{font-size:15px;font-weight:700;line-height:1.5}
.ark-flow-item p{font-size:13.5px;color:var(--ark-ink-2);line-height:1.7;margin-top:3px}

/* ============ 步骤卡 ============ */
.ark-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ark-step{
  position:relative;
  background:var(--ark-surface);
  border:1px solid var(--ark-line);
  border-radius:var(--ark-r-l);
  box-shadow:var(--ark-sh-1);
  padding:28px 24px 24px;
  transition:transform var(--ark-ease),box-shadow var(--ark-ease),border-color var(--ark-ease);
  overflow:hidden;
}
.ark-step:hover{transform:translateY(-4px);box-shadow:var(--ark-sh-3);border-color:rgba(14,124,102,.24)}
.ark-step-ghost{
  position:absolute;right:16px;top:6px;
  font-family:var(--ark-num);font-variant-numeric:tabular-nums;
  font-size:52px;font-weight:800;line-height:1;
  color:var(--ark-primary);opacity:.12;pointer-events:none;
}
.ark-step-tag{
  display:inline-flex;padding:4px 12px;border-radius:var(--ark-r-pill);
  background:var(--ark-primary-soft);color:var(--ark-primary);
  font-size:12.5px;font-weight:700;letter-spacing:.03em;
}
.ark-step h3{margin-top:16px;font-size:19px;font-weight:700;line-height:1.4}
.ark-step p{margin-top:10px;font-size:14.8px;color:var(--ark-ink-2);line-height:1.8}
.ark-step ul{margin-top:16px;padding-top:16px;border-top:1px solid var(--ark-line);display:grid;gap:9px}
.ark-step ul li{position:relative;padding-left:18px;font-size:13.8px;color:var(--ark-ink-2);line-height:1.7}
.ark-step ul li::before{
  content:"";position:absolute;left:0;top:9px;
  width:7px;height:7px;border-radius:2px;background:var(--ark-accent);opacity:.85;
}

/* ============ 设备对照 ============ */
.ark-compare{border:1px solid var(--ark-line);border-radius:var(--ark-r-l);background:var(--ark-surface);overflow:hidden;box-shadow:var(--ark-sh-1)}
.ark-compare-row{
  display:grid;grid-template-columns:170px 1fr 1fr;
  gap:20px;padding:18px 24px;align-items:start;
  border-bottom:1px solid var(--ark-line);
  transition:background var(--ark-ease);
}
.ark-compare-row:last-child{border-bottom:0}
.ark-compare-row:hover{background:var(--ark-surface-2)}
.ark-compare-head{background:var(--ark-primary-soft);border-bottom:1px solid rgba(14,124,102,.14)}
.ark-compare-head:hover{background:var(--ark-primary-soft)}
.ark-compare-head span{font-size:13.5px;font-weight:700;color:var(--ark-primary);letter-spacing:.03em}
.ark-compare-row dt{font-size:14.5px;font-weight:700;color:var(--ark-ink)}
.ark-compare-row dd{margin:0;font-size:14px;color:var(--ark-ink-2);line-height:1.75}

/* ============ 图文分栏 ============ */
.ark-split{display:grid;grid-template-columns:.88fr 1.12fr;gap:52px;align-items:center}
.ark-split-media{position:relative;border-radius:var(--ark-r-xl);overflow:hidden;box-shadow:var(--ark-sh-2);background:var(--ark-surface-2)}
.ark-split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s cubic-bezier(.2,.7,.3,1)}
.ark-split-media:hover img{transform:scale(1.04)}
.ark-split-media .ark-media-tag{
  position:absolute;left:16px;top:16px;
  padding:5px 13px;border-radius:var(--ark-r-pill);
  background:rgba(255,255,255,.94);color:var(--ark-primary);
  font-size:12.5px;font-weight:700;box-shadow:var(--ark-sh-1);
}
.ark-check-list{display:grid;gap:16px;margin-top:26px}
.ark-check-item{display:flex;gap:14px;align-items:flex-start}
.ark-check-icon{
  flex-shrink:0;width:28px;height:28px;border-radius:9px;
  background:var(--ark-primary-soft);color:var(--ark-primary);
  display:inline-flex;align-items:center;justify-content:center;margin-top:2px;
}
.ark-check-item h4{font-size:15.5px;font-weight:700;line-height:1.5}
.ark-check-item p{font-size:14.2px;color:var(--ark-ink-2);line-height:1.75;margin-top:2px}

/* ============ 文档清单 ============ */
.ark-doclist{max-width:880px;margin:0 auto;background:var(--ark-surface);border:1px solid var(--ark-line);border-radius:var(--ark-r-l);box-shadow:var(--ark-sh-1);overflow:hidden}
.ark-doc{
  display:flex;align-items:center;gap:18px;
  padding:18px 24px;border-bottom:1px solid var(--ark-line);
  transition:background var(--ark-ease);
}
.ark-doc:last-child{border-bottom:0}
.ark-doc:hover{background:var(--ark-surface-2)}
.ark-doc-num{font-family:var(--ark-num);font-variant-numeric:tabular-nums;font-size:19px;font-weight:800;color:var(--ark-primary);min-width:32px}
.ark-doc-thumb{flex-shrink:0;width:72px;height:72px;border-radius:14px;overflow:hidden;background:var(--ark-surface-2)}
.ark-doc-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s cubic-bezier(.2,.7,.3,1)}
.ark-doc:hover .ark-doc-thumb img{transform:scale(1.05)}
.ark-doc-body{flex:1;min-width:0}
.ark-doc-body h3{font-size:15.5px;font-weight:700;line-height:1.5;color:var(--ark-ink);transition:color var(--ark-ease)}
.ark-doc:hover .ark-doc-body h3{color:var(--ark-primary)}
.ark-doc-body p{font-size:13.8px;color:var(--ark-ink-2);line-height:1.7;margin-top:3px}
.ark-doc-arrow{flex-shrink:0;color:var(--ark-ink-2);transition:transform var(--ark-ease),color var(--ark-ease)}
.ark-doc:hover .ark-doc-arrow{transform:translateX(3px);color:var(--ark-primary)}

/* ============ FAQ ============ */
.ark-faq{max-width:860px;margin:0 auto}
.ark-faq-item{
  background:var(--ark-surface);
  border:1px solid var(--ark-line);
  border-radius:var(--ark-r-m);
  margin-bottom:12px;
  overflow:hidden;
  transition:border-color var(--ark-ease),box-shadow var(--ark-ease);
}
.ark-faq-item:hover{border-color:rgba(14,124,102,.26);box-shadow:var(--ark-sh-1)}
.ark-faq-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 22px;border:0;background:transparent;
  font-size:15.8px;font-weight:700;color:var(--ark-ink);text-align:left;
  cursor:pointer;transition:color var(--ark-ease);
}
.ark-faq-btn:hover{color:var(--ark-primary)}
.ark-faq-btn[aria-expanded="true"]{color:var(--ark-primary)}
.ark-faq-icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--ark-surface-2);color:var(--ark-ink-2);
  transition:transform var(--ark-ease),background var(--ark-ease),color var(--ark-ease);
}
.ark-faq-btn[aria-expanded="true"] .ark-faq-icon{transform:rotate(45deg);background:var(--ark-primary-soft);color:var(--ark-primary)}
.ark-faq-body{padding:0 22px 20px;font-size:14.6px;color:var(--ark-ink-2);line-height:1.85;max-width:660px}

/* ============ CTA ============ */
.ark-cta{
  position:relative;overflow:hidden;
  background:var(--ark-grad-brand);
  border-radius:var(--ark-r-xl);
  padding:48px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  color:#fff;
  box-shadow:var(--ark-sh-2);
}
.ark-cta::before,.ark-cta::after{content:"";position:absolute;border-radius:50%;pointer-events:none}
.ark-cta::before{width:240px;height:240px;right:-70px;top:-90px;border:26px solid rgba(255,255,255,.1)}
.ark-cta::after{width:150px;height:150px;right:110px;bottom:-90px;border:20px solid rgba(255,255,255,.07)}
.ark-cta-copy{position:relative;z-index:2;max-width:620px}
.ark-cta-copy h2{font-size:clamp(22px,2.6vw,28px);font-weight:800;line-height:1.3;letter-spacing:-.01em}
.ark-cta-copy p{margin-top:12px;font-size:15px;color:rgba(255,255,255,.86);line-height:1.8}
.ark-cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:12px}

/* ============ 页脚 ============ */
.ark-footer{background:var(--ark-dark);color:rgba(255,255,255,.72);padding:60px 0 28px;margin-top:0}
.ark-footer-grid{display:grid;grid-template-columns:1.35fr .8fr .8fr 1.05fr;gap:44px}
.ark-footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.ark-footer-brand strong{display:block;font-size:16px;color:#fff;font-weight:800;line-height:1.3}
.ark-footer-brand em{font-style:normal;display:block;font-size:11px;color:rgba(255,255,255,.6);letter-spacing:.06em;margin-top:2px}
.ark-footer p{font-size:13.8px;line-height:1.85;color:rgba(255,255,255,.66)}
.ark-footer h4{font-size:15px;color:#fff;font-weight:700;margin-bottom:16px}
.ark-footer ul{display:grid;gap:10px}
.ark-footer ul a{font-size:13.8px;color:rgba(255,255,255,.72)}
.ark-footer ul a:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}
.ark-footer-bottom{
  margin-top:44px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:12.5px;color:rgba(255,255,255,.52);
}
.ark-disclaim{max-width:640px;line-height:1.7}

/* ============ 移动抽屉 ============ */
.ark-drawer{
  position:fixed;inset:0;z-index:90;
  background:rgba(11,42,36,.42);
  opacity:0;visibility:hidden;
  transition:opacity var(--ark-ease),visibility var(--ark-ease);
}
.ark-drawer.is-open{opacity:1;visibility:visible}
.ark-drawer-panel{
  position:absolute;right:0;top:0;bottom:0;
  width:84vw;max-width:360px;
  background:#fff;
  border-radius:24px 0 0 24px;
  padding:24px 22px;
  overflow-y:auto;
  transform:translateX(100%);
  transition:transform var(--ark-ease);
}
.ark-drawer.is-open .ark-drawer-panel{transform:translateX(0)}
.ark-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.ark-drawer-close{
  width:38px;height:38px;border-radius:50%;border:1px solid var(--ark-line);
  background:#fff;color:var(--ark-ink);cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;
  transition:color var(--ark-ease),border-color var(--ark-ease);
}
.ark-drawer-close:hover{color:var(--ark-primary);border-color:var(--ark-primary)}
.ark-drawer-nav{display:grid;gap:4px;margin-bottom:22px}
.ark-drawer-nav a{
  padding:12px 14px;border-radius:12px;
  font-size:15px;font-weight:600;color:var(--ark-ink);
  transition:background var(--ark-ease),color var(--ark-ease);
}
.ark-drawer-nav a:hover,.ark-drawer-nav a.is-active{background:var(--ark-primary-soft);color:var(--ark-primary)}
.ark-drawer-search{display:flex;gap:10px;margin-bottom:18px}
.ark-drawer-search input{
  flex:1;height:44px;padding:0 16px;border-radius:var(--ark-r-pill);
  border:1px solid transparent;background:var(--ark-surface-2);
  font-size:14px;color:var(--ark-ink);
}
.ark-drawer-search input:focus{outline:none;background:#fff;border-color:var(--ark-primary);box-shadow:var(--ark-focus)}
.ark-drawer .ark-btn{width:100%}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .ark-nav-wrap{display:none}
  .ark-search{display:none}
  .ark-burger{display:inline-flex}
  .ark-actions{margin-left:auto}
  .ark-hero-grid{gap:40px}
}
@media (max-width:991px){
  .ark-section{padding:64px 0}
  .ark-hero-grid{grid-template-columns:1fr;gap:34px}
  .ark-hero-copy .ark-sub{max-width:100%}
  .ark-steps{grid-template-columns:1fr 1fr}
  .ark-split{grid-template-columns:1fr;gap:32px}
  .ark-compare-row{grid-template-columns:130px 1fr 1fr;gap:14px;padding:16px 18px}
  .ark-footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .ark-cta{flex-direction:column;align-items:flex-start;padding:40px 32px}
}
@media (max-width:767px){
  .ark-section{padding:48px 0}
  .ark-topbar-inner{height:64px;gap:12px}
  .ark-logo-mark{width:36px;height:36px;border-radius:12px;font-size:18px}
  .ark-brand-text strong{font-size:15px}
  .ark-brand-text em{font-size:10px}
  .ark-page-hero{padding:36px 0 48px}
  .ark-hero-btns{gap:10px}
  .ark-hero-btns .ark-btn{flex:1 1 auto;min-width:150px}
  .ark-trust{gap:14px;flex-direction:column;align-items:flex-start}
  .ark-flow{padding:20px 18px 12px}
  .ark-steps{grid-template-columns:1fr;gap:16px}
  .ark-compare{border-radius:var(--ark-r-m)}
  .ark-compare-head{display:none}
  .ark-compare-row{grid-template-columns:1fr;gap:8px;padding:16px 18px}
  .ark-compare-row dt{padding-bottom:6px;border-bottom:1px dashed var(--ark-line)}
  .ark-compare-row dd::before{content:"电脑端：";color:var(--ark-primary);font-weight:700;font-size:12.5px;margin-right:2px}
  .ark-compare-row dd+dd::before{content:"手机端："}
  .ark-doc{gap:12px;padding:14px 16px;flex-wrap:wrap}
  .ark-doc-thumb{width:56px;height:56px;border-radius:12px}
  .ark-doc-num{font-size:16px;min-width:24px}
  .ark-doc-body h3{font-size:14.8px}
  .ark-doc-arrow{display:none}
  .ark-faq-btn{padding:16px 16px;font-size:15px}
  .ark-faq-body{padding:0 16px 18px}
  .ark-cta{padding:32px 22px;border-radius:var(--ark-r-l)}
  .ark-cta-actions{width:100%}
  .ark-cta-actions .ark-btn{width:100%}
  .ark-footer{padding:44px 0 24px}
  .ark-footer-grid{grid-template-columns:1fr;gap:30px}
  .ark-footer-bottom{flex-direction:column;align-items:flex-start;gap:10px}
}
@media (max-width:519px){
  .ark-hero-copy h1{font-size:27px}
  .ark-hero-copy .ark-sub{font-size:15.2px}
  .ark-btn{height:46px;padding:0 20px;font-size:14.5px}
}

/* roulang page: category2 */
:root{
  --ark-primary:#0E7C66;
  --ark-primary-2:#12A085;
  --ark-primary-soft:#E3F3EE;
  --ark-accent:#FF7A45;
  --ark-accent-soft:#FFEDE4;
  --ark-badge:#FFC53D;
  --ark-ink:#16221F;
  --ark-ink-2:#5A6B66;
  --ark-line:#E8E2D7;
  --ark-bg:#FBF8F3;
  --ark-surface:#FFFFFF;
  --ark-surface-2:#F4EFE6;
  --ark-dark:#0B2A24;
  --ark-grad-brand:linear-gradient(135deg,#0E7C66 0%,#12A085 55%,#3FC79E 100%);
  --ark-grad-warm:linear-gradient(135deg,#FF7A45 0%,#FFB27A 100%);
  --ark-r-s:10px;
  --ark-r-m:16px;
  --ark-r-l:22px;
  --ark-r-xl:28px;
  --ark-r-pill:999px;
  --ark-sh-1:0 2px 8px rgba(16,52,45,.05);
  --ark-sh-2:0 10px 28px rgba(16,52,45,.09);
  --ark-sh-3:0 18px 44px rgba(16,52,45,.14);
  --ark-focus:0 0 0 4px rgba(18,160,133,.22);
  --ark-font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ark-num:"DIN Alternate","Bahnschrift",ui-monospace,"SF Mono",Menlo,monospace;
  --ark-t:.22s cubic-bezier(.2,.7,.3,1);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--ark-font);
  background:var(--ark-bg);
  color:var(--ark-ink);
  font-size:16px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--ark-primary);text-decoration:none;transition:color var(--ark-t);}
a:hover{color:var(--ark-primary-2);}
h1,h2,h3,h4,h5{margin:0;color:var(--ark-ink);}
p{margin:0 0 16px;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:none;box-shadow:var(--ark-focus);border-radius:var(--ark-r-s);}
.ark-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
@media (min-width:1400px){.ark-container{max-width:1280px;}}
@media (max-width:768px){.ark-container{padding:0 16px;}}

/* ---------- 顶部导航 ---------- */
.ark-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(251,248,243,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--ark-line);
  transition:box-shadow var(--ark-t);
}
.ark-header.is-scrolled{box-shadow:var(--ark-sh-1);}
.ark-header-inner{
  display:flex;align-items:center;gap:26px;height:72px;
  transition:height var(--ark-t);
}
.ark-header.is-scrolled .ark-header-inner{height:56px;}
.ark-brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.ark-logo-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:14px;
  background:var(--ark-grad-brand);color:#fff;
  display:grid;place-items:center;
  font-weight:800;font-size:19px;line-height:1;
  box-shadow:0 6px 14px rgba(14,124,102,.24);
}
.ark-brand-text strong{display:block;font-size:16px;font-weight:800;letter-spacing:-.01em;color:var(--ark-ink);line-height:1.25;}
.ark-brand-text em{font-style:normal;display:block;font-size:11px;letter-spacing:.08em;color:var(--ark-ink-2);line-height:1.4;}
.ark-nav{display:flex;align-items:center;gap:22px;margin-left:8px;flex:1;}
.ark-nav a{
  position:relative;font-size:14.5px;font-weight:500;color:var(--ark-ink-2);
  padding:6px 0;white-space:nowrap;
}
.ark-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:3px;border-radius:3px;
  background:var(--ark-primary);transform:scaleX(0);transform-origin:left;transition:transform var(--ark-t);
}
.ark-nav a:hover{color:var(--ark-primary);}
.ark-nav a:hover::after,.ark-nav a.is-active::after{transform:scaleX(1);}
.ark-nav a.is-active{color:var(--ark-primary);font-weight:700;}
.ark-search{
  display:flex;align-items:center;gap:8px;
  background:var(--ark-surface-2);border-radius:var(--ark-r-pill);
  padding:0 16px;height:42px;min-width:200px;
  border:1.5px solid transparent;transition:border-color var(--ark-t),box-shadow var(--ark-t);
}
.ark-search:focus-within{border-color:var(--ark-primary);box-shadow:var(--ark-focus);}
.ark-search i{color:var(--ark-ink-2);font-size:14px;}
.ark-search input{
  border:0;background:transparent;outline:none;font-size:14px;color:var(--ark-ink);
  width:100%;line-height:1.6;
}
.ark-search input::placeholder{color:#93a29d;}
.ark-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:0;cursor:pointer;font-weight:700;font-size:15px;
  border-radius:var(--ark-r-pill);
  height:48px;padding:0 26px;
  transition:transform var(--ark-t),box-shadow var(--ark-t),background var(--ark-t),color var(--ark-t),border-color var(--ark-t);
}
.ark-btn-primary{background:var(--ark-grad-brand);color:#fff;box-shadow:0 6px 16px rgba(14,124,102,.22);}
.ark-btn-primary:hover{color:#fff;box-shadow:var(--ark-sh-2);transform:translateY(-1px);}
.ark-btn-primary:active{transform:translateY(0);box-shadow:var(--ark-sh-1);}
.ark-btn-ghost{background:var(--ark-surface);color:var(--ark-primary);border:1.5px solid var(--ark-line);}
.ark-btn-ghost:hover{color:var(--ark-primary);border-color:var(--ark-primary);box-shadow:var(--ark-sh-1);}
.ark-btn-sm{height:42px;padding:0 20px;font-size:14px;}
.ark-btn-light{background:#fff;color:var(--ark-primary);}
.ark-btn-light:hover{color:var(--ark-primary);box-shadow:var(--ark-sh-2);transform:translateY(-1px);}
.ark-hotbar{
  display:flex;align-items:center;gap:10px;
  overflow-x:auto;padding-bottom:12px;
  scrollbar-width:none;
  max-height:60px;transition:max-height var(--ark-t),opacity var(--ark-t),padding var(--ark-t);
}
.ark-hotbar::-webkit-scrollbar{display:none;}
.ark-header.is-scrolled .ark-hotbar{max-height:0;opacity:0;padding-bottom:0;overflow:hidden;}
.ark-hotbar span{font-size:12.5px;letter-spacing:.02em;color:var(--ark-ink-2);white-space:nowrap;}
.ark-chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:var(--ark-r-pill);
  background:var(--ark-surface-2);color:var(--ark-ink-2);
  font-size:13px;white-space:nowrap;
  transition:background var(--ark-t),color var(--ark-t);
}
.ark-chip:hover{background:var(--ark-primary-soft);color:var(--ark-primary);}
.ark-burger{
  display:none;width:44px;height:44px;border-radius:14px;
  border:1.5px solid var(--ark-line);background:var(--ark-surface);
  color:var(--ark-ink);align-items:center;justify-content:center;font-size:17px;cursor:pointer;
}
.ark-burger:hover{border-color:var(--ark-primary);color:var(--ark-primary);}
.ark-overlay{
  position:fixed;inset:0;background:rgba(11,42,36,.44);z-index:1040;
  opacity:0;pointer-events:none;transition:opacity var(--ark-t);
}
.ark-overlay.is-open{opacity:1;pointer-events:auto;}
.ark-drawer{
  position:fixed;top:0;right:0;height:100%;width:84vw;max-width:360px;
  background:var(--ark-surface);z-index:1050;
  border-radius:24px 0 0 24px;
  padding:24px 22px 32px;
  transform:translateX(102%);transition:transform var(--ark-t);
  overflow-y:auto;box-shadow:var(--ark-sh-3);
}
.ark-drawer.is-open{transform:translateX(0);}
.ark-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.ark-drawer-close{
  width:40px;height:40px;border-radius:50%;border:1.5px solid var(--ark-line);
  background:var(--ark-surface);color:var(--ark-ink);cursor:pointer;font-size:16px;
  display:grid;place-items:center;
}
.ark-drawer-close:hover{border-color:var(--ark-primary);color:var(--ark-primary);}
.ark-drawer nav a{
  display:block;padding:13px 14px;border-radius:var(--ark-r-s);
  color:var(--ark-ink);font-size:15px;font-weight:500;
  transition:background var(--ark-t),color var(--ark-t);
}
.ark-drawer nav a:hover{background:var(--ark-surface-2);color:var(--ark-primary);}
.ark-drawer nav a.is-active{background:var(--ark-primary-soft);color:var(--ark-primary);font-weight:700;}
.ark-drawer .ark-drawer-cta{margin-top:22px;}
@media (max-width:1199px){
  .ark-nav{gap:16px;font-size:14px;}
  .ark-search{min-width:160px;}
}
@media (max-width:991px){
  .ark-nav,.ark-search,.ark-header .ark-btn-primary{display:none;}
  .ark-burger{display:flex;margin-left:auto;}
  .ark-header-inner{height:62px;}
}

/* ---------- Hero ---------- */
.ark-hero{
  position:relative;overflow:hidden;
  padding:56px 0 64px;
  background:linear-gradient(180deg,#E3F3EE 0%,#F1F7F4 45%,var(--ark-bg) 100%);
}
.ark-hero::before{
  content:"";position:absolute;width:460px;height:460px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,122,69,.16),rgba(255,122,69,0) 68%);
  right:-120px;top:-160px;pointer-events:none;
}
.ark-hero::after{
  content:"";position:absolute;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,160,133,.14),rgba(18,160,133,0) 70%);
  left:-160px;bottom:-200px;pointer-events:none;
}
.ark-hero-grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1fr 380px;gap:48px;align-items:center;
}
.ark-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--ark-surface);border:1px solid var(--ark-line);
  color:var(--ark-primary);font-size:12.5px;font-weight:700;letter-spacing:.04em;
  padding:6px 14px;border-radius:var(--ark-r-pill);box-shadow:var(--ark-sh-1);
}
.ark-hero h1{
  font-size:clamp(28px,4.2vw,44px);line-height:1.15;font-weight:800;
  letter-spacing:-.02em;margin:18px 0 14px;
}
.ark-hero h1 em{font-style:normal;color:var(--ark-primary);}
.ark-hero-sub{font-size:17px;color:var(--ark-ink-2);max-width:560px;margin-bottom:24px;}
.ark-hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px;}
.ark-trust{display:flex;flex-wrap:wrap;gap:22px;}
.ark-trust li{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--ark-ink-2);}
.ark-trust i{color:var(--ark-primary-2);font-size:13px;}
.ark-hero-card{
  position:relative;background:var(--ark-surface);border-radius:var(--ark-r-xl);
  padding:14px;border:1px solid var(--ark-line);box-shadow:var(--ark-sh-2);
}
.ark-hero-card figure{margin:0;border-radius:var(--ark-r-l);overflow:hidden;aspect-ratio:4/3;background:var(--ark-surface-2);}
.ark-hero-card img{width:100%;height:100%;object-fit:cover;}
.ark-hero-card figcaption{
  padding:16px 8px 6px;font-size:14px;color:var(--ark-ink-2);line-height:1.7;
}
.ark-hero-card figcaption strong{display:block;color:var(--ark-ink);font-size:15.5px;margin-bottom:4px;}
.ark-float-badge{
  position:absolute;right:-14px;top:-18px;
  background:#fff;border:1px solid var(--ark-line);border-radius:var(--ark-r-m);
  padding:10px 14px;box-shadow:var(--ark-sh-2);text-align:center;
}
.ark-float-badge b{display:block;font-family:var(--ark-num);font-variant-numeric:tabular-nums;font-size:22px;color:var(--ark-primary);line-height:1.1;}
.ark-float-badge span{font-size:11.5px;color:var(--ark-ink-2);}
@media (max-width:991px){
  .ark-hero-grid{grid-template-columns:1fr;gap:32px;}
  .ark-hero-card{max-width:420px;}
  .ark-hero{padding:40px 0 48px;}
}
@media (max-width:575px){
  .ark-hero-card{max-width:100%;}
  .ark-float-badge{right:6px;top:-14px;}
}

/* ---------- 通用板块 ---------- */
.ark-section{padding:64px 0;}
.ark-section-tight{padding:48px 0;}
.ark-section-head{max-width:720px;margin-bottom:36px;}
.ark-section-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.25;font-weight:700;letter-spacing:-.01em;}
.ark-section-head p{margin-top:12px;color:var(--ark-ink-2);font-size:15.5px;}
.ark-rule{height:1px;background:var(--ark-line);border:0;margin:0;}
@media (max-width:991px){.ark-section{padding:48px 0;}}
@media (max-width:576px){.ark-section{padding:40px 0;}}

/* ---------- 帮助主体：目录 + 卡片 ---------- */
.ark-help-layout{
  display:grid;grid-template-columns:260px minmax(0,1fr);gap:32px;align-items:start;
}
.ark-toc{
  position:sticky;top:96px;
  background:var(--ark-surface);border:1px solid var(--ark-line);
  border-radius:var(--ark-r-l);padding:20px 16px;box-shadow:var(--ark-sh-1);
}
.ark-toc h2{
  font-size:13px;letter-spacing:.08em;color:var(--ark-ink-2);font-weight:700;
  text-transform:none;margin-bottom:12px;padding:0 8px;
}
.ark-toc a{
  display:block;padding:11px 12px;border-radius:var(--ark-r-s);
  font-size:14.5px;color:var(--ark-ink-2);
  transition:background var(--ark-t),color var(--ark-t);
}
.ark-toc a:hover{background:var(--ark-surface-2);color:var(--ark-primary);}
.ark-toc a.is-current{
  background:var(--ark-primary-soft);color:var(--ark-primary);font-weight:700;
  box-shadow:inset 3px 0 0 var(--ark-primary);
}
.ark-toc-note{
  margin-top:16px;padding:14px 12px;border-radius:var(--ark-r-m);
  background:var(--ark-surface-2);font-size:13px;color:var(--ark-ink-2);line-height:1.7;
}
.ark-help-main{min-width:0;}
.ark-group{margin-bottom:40px;scroll-margin-top:96px;}
.ark-group-head{display:flex;align-items:center;gap:12px;margin-bottom:18px;}
.ark-group-head h3{font-size:20px;font-weight:700;line-height:1.4;}
.ark-group-head .ark-count{
  font-family:var(--ark-num);font-variant-numeric:tabular-nums;
  font-size:12.5px;color:var(--ark-accent);
  background:var(--ark-accent-soft);border-radius:var(--ark-r-pill);padding:2px 10px;
}
.ark-help-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
.ark-help-card{
  display:flex;flex-direction:column;gap:12px;
  background:var(--ark-surface);border:1px solid var(--ark-line);
  border-radius:var(--ark-r-l);padding:22px;
  box-shadow:var(--ark-sh-1);
  transition:transform var(--ark-t),box-shadow var(--ark-t),border-color var(--ark-t);
}
.ark-help-card:hover{transform:translateY(-4px);box-shadow:var(--ark-sh-2);border-color:#CFE7DF;}
.ark-help-card .ark-ic{
  width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
  background:var(--ark-primary-soft);color:var(--ark-primary);font-size:17px;
}
.ark-help-card h4{font-size:16.5px;font-weight:700;line-height:1.5;}
.ark-help-card p{font-size:14.5px;color:var(--ark-ink-2);line-height:1.75;margin:0;}
.ark-help-card .ark-more{
  display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:700;
  color:var(--ark-primary);margin-top:2px;
}
.ark-help-card .ark-more i{transition:transform var(--ark-t);}
.ark-help-card:hover .ark-more i{transform:translateX(3px);}
.ark-tag{
  display:inline-flex;align-items:center;
  padding:3px 10px;border-radius:var(--ark-r-pill);
  background:var(--ark-primary-soft);color:var(--ark-primary);
  font-size:12px;font-weight:600;letter-spacing:.02em;
}
@media (max-width:991px){
  .ark-help-layout{grid-template-columns:1fr;}
  .ark-toc{position:static;}
  .ark-toc ul{display:flex;flex-wrap:wrap;gap:6px;}
  .ark-toc a{padding:8px 12px;font-size:13.5px;}
  .ark-toc a.is-current{box-shadow:inset 0 0 0 1.5px var(--ark-primary);}
  .ark-toc-note{display:none;}
}
@media (max-width:767px){
  .ark-help-grid{grid-template-columns:1fr;}
}

/* ---------- 处理顺序 ---------- */
.ark-flow-wrap{background:var(--ark-surface);border:1px solid var(--ark-line);border-radius:var(--ark-r-xl);padding:40px;box-shadow:var(--ark-sh-1);}
.ark-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;}
.ark-flow-item{border-top:2px solid var(--ark-line);padding-top:18px;transition:border-color var(--ark-t);}
.ark-flow-item:hover{border-top-color:var(--ark-primary);}
.ark-flow-num{
  font-family:var(--ark-num);font-variant-numeric:tabular-nums;
  font-size:26px;font-weight:700;color:var(--ark-primary);line-height:1;
}
.ark-flow-item h4{font-size:15.5px;font-weight:700;margin:10px 0 6px;}
.ark-flow-item p{font-size:14px;color:var(--ark-ink-2);line-height:1.7;margin:0;}
@media (max-width:991px){
  .ark-flow{grid-template-columns:repeat(2,minmax(0,1fr));}
  .ark-flow-wrap{padding:28px;}
}
@media (max-width:575px){.ark-flow{grid-template-columns:1fr;}}

/* ---------- 图文对照 ---------- */
.ark-split{display:grid;grid-template-columns:1.05fr 1fr;gap:44px;align-items:center;}
.ark-split figure{margin:0;border-radius:var(--ark-r-xl);overflow:hidden;border:1px solid var(--ark-line);box-shadow:var(--ark-sh-2);background:var(--ark-surface-2);aspect-ratio:4/3;}
.ark-split figure img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ark-t);}
.ark-split figure:hover img{transform:scale(1.04);}
.ark-split h2{font-size:clamp(22px,2.6vw,30px);line-height:1.3;font-weight:700;margin-bottom:14px;}
.ark-split .ark-lead{color:var(--ark-ink-2);font-size:15.5px;margin-bottom:22px;}
.ark-check-list li{
  display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--ark-line);
  font-size:14.8px;color:var(--ark-ink);
}
.ark-check-list li:last-child{border-bottom:0;}
.ark-check-list i{color:var(--ark-primary-2);font-size:14px;margin-top:6px;flex:0 0 auto;}
.ark-check-list span strong{display:block;font-weight:700;}
.ark-check-list span em{font-style:normal;color:var(--ark-ink-2);font-size:13.8px;}
@media (max-width:991px){
  .ark-split{grid-template-columns:1fr;gap:28px;}
  .ark-split figure{order:-1;}
}

/* ---------- FAQ ---------- */
.ark-faq-list{max-width:880px;margin:0 auto;}
.ark-faq-item{
  background:var(--ark-surface);border:1px solid var(--ark-line);
  border-radius:var(--ark-r-m);margin-bottom:12px;overflow:hidden;
  transition:box-shadow var(--ark-t),border-color var(--ark-t);
}
.ark-faq-item:hover{border-color:#CFE7DF;box-shadow:var(--ark-sh-1);}
.ark-faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-size:15.5px;font-weight:700;color:var(--ark-ink);
}
.ark-faq-item summary::-webkit-details-marker{display:none;}
.ark-faq-item summary .ark-faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  background:var(--ark-primary-soft);color:var(--ark-primary);
  display:grid;place-items:center;font-size:12px;
  transition:transform var(--ark-t),background var(--ark-t),color var(--ark-t);
}
.ark-faq-item[open] summary .ark-faq-icon{transform:rotate(180deg);background:var(--ark-primary);color:#fff;}
.ark-faq-item .ark-faq-body{
  padding:0 22px 20px;font-size:14.8px;color:var(--ark-ink-2);line-height:1.85;
}
.ark-faq-item .ark-faq-body p:last-child{margin-bottom:0;}

/* ---------- CTA ---------- */
.ark-cta{
  position:relative;overflow:hidden;
  background:var(--ark-grad-brand);
  border-radius:var(--ark-r-xl);
  padding:48px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  box-shadow:var(--ark-sh-2);
}
.ark-cta::before{
  content:"";position:absolute;right:-60px;bottom:-90px;
  width:280px;height:280px;border-radius:50%;
  border:26px solid rgba(255,255,255,.12);
}
.ark-cta::after{
  content:"";position:absolute;right:120px;top:-70px;
  width:160px;height:160px;border-radius:50%;
  border:18px solid rgba(255,255,255,.09);
}
.ark-cta-text{position:relative;z-index:1;max-width:620px;}
.ark-cta h2{color:#fff;font-size:clamp(21px,2.4vw,28px);line-height:1.35;font-weight:800;}
.ark-cta p{color:rgba(255,255,255,.86);margin:10px 0 0;font-size:15px;}
.ark-cta-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:12px;}
@media (max-width:991px){
  .ark-cta{flex-direction:column;align-items:flex-start;padding:32px;}
}

/* ---------- 页脚 ---------- */
.ark-footer{background:var(--ark-dark);color:rgba(255,255,255,.72);padding:56px 0 28px;margin-top:64px;}
.ark-footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.ark-footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.ark-footer-brand .ark-logo-mark{box-shadow:none;}
.ark-footer-brand strong{display:block;color:#fff;font-size:16px;line-height:1.3;}
.ark-footer-brand em{font-style:normal;display:block;font-size:11.5px;letter-spacing:.08em;color:rgba(255,255,255,.6);}
.ark-footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:14px;}
.ark-footer p{font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.72);margin:0;}
.ark-footer ul li{margin-bottom:10px;}
.ark-footer ul a{color:rgba(255,255,255,.72);font-size:13.8px;transition:color var(--ark-t);}
.ark-footer ul a:hover{color:#fff;}
.ark-footer-bottom{
  margin-top:36px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:12.5px;color:rgba(255,255,255,.55);
}
.ark-disclaim{max-width:640px;}
@media (max-width:991px){
  .ark-footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:575px){
  .ark-footer-grid{grid-template-columns:1fr;}
  .ark-footer{padding:40px 0 24px;margin-top:48px;}
}

/* roulang page: category3 */
:root{
  --ark-primary:#0E7C66;
  --ark-primary-2:#12A085;
  --ark-primary-soft:#E3F3EE;
  --ark-accent:#FF7A45;
  --ark-accent-soft:#FFEDE4;
  --ark-badge:#FFC53D;
  --ark-ink:#16221F;
  --ark-ink-2:#5A6B66;
  --ark-line:#E8E2D7;
  --ark-bg:#FBF8F3;
  --ark-surface:#FFFFFF;
  --ark-surface-2:#F4EFE6;
  --ark-dark:#0B2A24;
  --ark-grad-brand:linear-gradient(135deg,#0E7C66 0%,#12A085 55%,#3FC79E 100%);
  --ark-grad-warm:linear-gradient(135deg,#FF7A45 0%,#FFB27A 100%);
  --ark-font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ark-num:"DIN Alternate","Bahnschrift",ui-monospace,"SF Mono",Menlo,monospace;
  --ark-r-s:10px;
  --ark-r-m:16px;
  --ark-r-l:22px;
  --ark-r-xl:28px;
  --ark-r-pill:999px;
  --ark-sh-1:0 2px 8px rgba(16,52,45,.05);
  --ark-sh-2:0 10px 28px rgba(16,52,45,.09);
  --ark-sh-3:0 18px 44px rgba(16,52,45,.14);
  --ark-focus:0 0 0 4px rgba(18,160,133,.22);
  --ark-ease:.22s cubic-bezier(.2,.7,.3,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--ark-font);
  font-size:16px;
  line-height:1.8;
  color:var(--ark-ink);
  background:var(--ark-bg);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--ark-primary);text-decoration:none;transition:color var(--ark-ease)}
a:hover{color:var(--ark-primary-2)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--ark-ink);letter-spacing:-.01em;font-weight:700}
p{margin:0 0 16px;color:var(--ark-ink-2)}
figure{margin:0}
button,input{font-family:inherit;font-size:inherit}
button{cursor:pointer}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{outline:none;box-shadow:var(--ark-focus);border-radius:10px}

.ark-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.ark-skip{position:absolute;left:-9999px;top:0;background:#fff;padding:12px 18px;border-radius:var(--ark-r-s);z-index:2000}
.ark-skip:focus{left:16px;top:16px}

/* ---------- header ---------- */
.ark-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(251,248,243,.92);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--ark-line);
  transition:box-shadow var(--ark-ease);
}
.ark-header.is-scrolled{box-shadow:var(--ark-sh-1)}
.ark-topbar-inner{
  display:flex;align-items:center;gap:18px;
  height:72px;
  transition:height var(--ark-ease);
}
.ark-header.is-scrolled .ark-topbar-inner{height:56px}

.ark-brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.ark-logo-mark{
  width:40px;height:40px;border-radius:14px;
  background:var(--ark-grad-brand);
  color:#fff;display:grid;place-items:center;
  font-weight:800;font-size:18px;
  box-shadow:var(--ark-sh-1);
  transition:transform var(--ark-ease),box-shadow var(--ark-ease);
}
.ark-brand:hover .ark-logo-mark{transform:translateY(-2px);box-shadow:var(--ark-sh-2)}
.ark-brand-text strong{display:block;font-size:16px;font-weight:800;color:var(--ark-ink);line-height:1.25;letter-spacing:.01em}
.ark-brand-text em{display:block;font-style:normal;font-size:11px;letter-spacing:.14em;color:var(--ark-ink-2);line-height:1.5}

.ark-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.ark-nav a{
  position:relative;padding:8px 12px;font-size:14.5px;
  color:var(--ark-ink-2);white-space:nowrap;border-radius:10px;
  transition:color var(--ark-ease);
}
.ark-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:3px;
  border-radius:3px;background:var(--ark-primary);
  transform:scaleX(0);transform-origin:left;
  transition:transform var(--ark-ease);
}
.ark-nav a:hover{color:var(--ark-primary)}
.ark-nav a.is-active{color:var(--ark-primary);font-weight:700}
.ark-nav a.is-active::after{transform:scaleX(1)}

.ark-topbar-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.ark-search{
  display:flex;align-items:center;gap:8px;
  height:44px;padding:0 6px 0 14px;
  background:var(--ark-surface-2);
  border-radius:var(--ark-r-pill);
  transition:background var(--ark-ease),box-shadow var(--ark-ease);
}
.ark-search:focus-within{background:#fff;box-shadow:0 0 0 1.5px var(--ark-primary),var(--ark-focus)}
.ark-search input{
  border:0;background:transparent;outline:none;
  width:146px;height:100%;font-size:14px;color:var(--ark-ink);
}
.ark-search input::placeholder{color:#93a39d}
.ark-search button{
  width:32px;height:32px;border:0;border-radius:50%;
  background:var(--ark-primary);color:#fff;
  display:grid;place-items:center;font-size:12px;
  transition:background var(--ark-ease),transform var(--ark-ease);
}
.ark-search button:hover{background:var(--ark-primary-2);transform:scale(1.05)}

.ark-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border:0;
  border-radius:var(--ark-r-pill);
  font-size:15px;font-weight:600;line-height:1;
  text-align:center;
  transition:transform var(--ark-ease),box-shadow var(--ark-ease),background var(--ark-ease),color var(--ark-ease),border-color var(--ark-ease);
}
.ark-btn-primary{background:var(--ark-grad-brand);color:#fff;box-shadow:var(--ark-sh-1)}
.ark-btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:var(--ark-sh-2);filter:brightness(1.05)}
.ark-btn-primary:active{transform:translateY(0);box-shadow:var(--ark-sh-1)}
.ark-btn-ghost{background:#fff;color:var(--ark-primary);border:1.5px solid var(--ark-line)}
.ark-btn-ghost:hover{color:var(--ark-primary);border-color:var(--ark-primary);box-shadow:var(--ark-sh-1)}
.ark-btn-light{background:#fff;color:var(--ark-primary);box-shadow:var(--ark-sh-2)}
.ark-btn-light:hover{color:var(--ark-primary);transform:translateY(-2px);box-shadow:var(--ark-sh-3)}
.ark-btn-sm{height:40px;padding:0 18px;font-size:14px}

.ark-link{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--ark-primary)}
.ark-link i{font-size:11px;transition:transform var(--ark-ease)}
.ark-link:hover i{transform:translateX(3px)}

.ark-hotbar{border-top:1px solid rgba(232,226,215,.75)}
.ark-hotbar-inner{
  display:flex;align-items:center;gap:12px;height:44px;
  overflow-x:auto;scrollbar-width:none;
}
.ark-hotbar-inner::-webkit-scrollbar{display:none}
.ark-hotbar-label{flex:0 0 auto;font-size:12.5px;letter-spacing:.02em;color:var(--ark-ink-2)}
.ark-chips{display:flex;align-items:center;gap:8px}
.ark-chip{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--ark-r-pill);
  background:var(--ark-surface-2);color:var(--ark-ink-2);
  font-size:13px;line-height:1.6;
  transition:background var(--ark-ease),color var(--ark-ease),box-shadow var(--ark-ease);
}
.ark-chip:hover{background:var(--ark-primary-soft);color:var(--ark-primary)}
.ark-chip.is-on{background:var(--ark-primary);color:#fff}
.ark-chip.is-on:hover{background:var(--ark-primary-2);color:#fff}

.ark-burger{
  display:none;width:44px;height:44px;
  border:1.5px solid var(--ark-line);border-radius:14px;
  background:#fff;color:var(--ark-ink);
  align-items:center;justify-content:center;font-size:16px;
  transition:border-color var(--ark-ease),color var(--ark-ease);
}
.ark-burger:hover{border-color:var(--ark-primary);color:var(--ark-primary)}

/* ---------- drawer ---------- */
.ark-drawer{position:fixed;inset:0;z-index:1200;visibility:hidden;pointer-events:none}
.ark-drawer.is-open{visibility:visible;pointer-events:auto}
.ark-drawer-mask{position:absolute;inset:0;background:rgba(11,42,36,.45);opacity:0;transition:opacity var(--ark-ease)}
.ark-drawer.is-open .ark-drawer-mask{opacity:1}
.ark-drawer-panel{
  position:absolute;top:0;right:0;width:84vw;max-width:360px;height:100%;
  background:#fff;border-radius:24px 0 0 24px;
  padding:20px;display:flex;flex-direction:column;gap:18px;
  overflow-y:auto;transform:translateX(100%);
  transition:transform .28s cubic-bezier(.2,.7,.3,1);
  box-shadow:var(--ark-sh-3);
}
.ark-drawer.is-open .ark-drawer-panel{transform:translateX(0)}
.ark-drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.ark-drawer-close{
  width:40px;height:40px;border:1.5px solid var(--ark-line);border-radius:12px;
  background:#fff;color:var(--ark-ink);display:grid;place-items:center;
  transition:border-color var(--ark-ease),color var(--ark-ease);
}
.ark-drawer-close:hover{border-color:var(--ark-primary);color:var(--ark-primary)}
.ark-search-block{width:100%}
.ark-search-block input{width:100%}
.ark-drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--ark-line)}
.ark-drawer-nav a{
  padding:14px 4px;border-bottom:1px solid var(--ark-line);
  font-size:15px;color:var(--ark-ink);
  display:flex;align-items:center;justify-content:space-between;
  transition:color var(--ark-ease),padding-left var(--ark-ease);
}
.ark-drawer-nav a::after{content:"\203A";color:#b9c4bf;font-size:16px}
.ark-drawer-nav a:hover{color:var(--ark-primary);padding-left:8px}
.ark-drawer-nav a.is-active{color:var(--ark-primary);font-weight:700}

/* ---------- hero ---------- */
.ark-hero{
  position:relative;overflow:hidden;
  padding:44px 0 64px;
  background:
    radial-gradient(720px 380px at 6% 0%,rgba(18,160,133,.14),transparent 62%),
    radial-gradient(560px 320px at 94% 10%,rgba(255,122,69,.13),transparent 64%),
    linear-gradient(180deg,#F1FAF6 0%,var(--ark-bg) 72%);
}
.ark-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:url(/assets/images/backpic/back-1.webp) center/cover no-repeat;
  opacity:.06;
}
.ark-hero > .ark-container{position:relative;z-index:1}

.ark-crumb{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:22px;font-size:14px;color:var(--ark-ink-2)}
.ark-crumb a{color:var(--ark-ink-2)}
.ark-crumb a:hover{color:var(--ark-primary);text-decoration:underline}
.ark-crumb i{font-size:10px;color:#a7b2ad}
.ark-crumb span{color:var(--ark-ink);font-weight:600}

.ark-hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:48px;align-items:center}
.ark-tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 13px;border-radius:var(--ark-r-pill);
  background:var(--ark-primary-soft);color:var(--ark-primary);
  font-size:12.5px;font-weight:700;letter-spacing:.02em;
}
.ark-tag i{font-size:11px}
.ark-hero h1{
  font-size:clamp(28px,4.2vw,44px);line-height:1.15;font-weight:800;
  letter-spacing:-.02em;margin:16px 0 18px;
}
.ark-hero-sub{font-size:17px;line-height:1.75;color:var(--ark-ink-2);max-width:33em;margin-bottom:28px}
.ark-hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.ark-trust{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:28px;font-size:13.5px;color:var(--ark-ink-2)}
.ark-trust span{display:inline-flex;align-items:center;gap:8px}
.ark-trust i{color:var(--ark-primary-2);font-size:12px}

.ark-hero-visual{position:relative;max-width:372px;margin-left:auto}
.ark-hero-photo{
  position:relative;border-radius:var(--ark-r-xl);overflow:hidden;
  aspect-ratio:4/5;background:var(--ark-surface-2);
  box-shadow:var(--ark-sh-3);
}
.ark-hero-photo img{width:100%;height:100%;object-fit:cover;transition:transform .45s cubic-bezier(.2,.7,.3,1)}
.ark-hero-photo:hover img{transform:scale(1.04)}
.ark-hero-photo-cap{
  position:absolute;left:0;right:0;bottom:0;padding:22px;
  background:linear-gradient(180deg,rgba(11,42,36,0) 0%,rgba(11,42,36,.82) 72%);
  color:#fff;
}
.ark-hero-photo-cap strong{display:block;font-size:16px;font-weight:700;margin-bottom:4px;color:#fff}
.ark-hero-photo-cap span{font-size:12.5px;color:rgba(255,255,255,.82);letter-spacing:.02em}
.ark-float-badge{
  position:absolute;top:-14px;right:-12px;z-index:2;
  display:flex;align-items:center;gap:10px;
  padding:12px 16px;background:#fff;
  border:1px solid var(--ark-line);border-radius:var(--ark-r-m);
  box-shadow:var(--ark-sh-2);
}
.ark-float-badge b{font-family:var(--ark-num);font-size:24px;line-height:1;color:var(--ark-accent);font-variant-numeric:tabular-nums}
.ark-float-badge span{font-size:12px;line-height:1.3;color:var(--ark-ink-2)}

.ark-statbar{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:52px}
.ark-stat{
  display:flex;align-items:center;gap:12px;
  padding:16px 18px;background:#fff;
  border:1px solid var(--ark-line);border-radius:var(--ark-r-m);
  box-shadow:var(--ark-sh-1);
  transition:transform var(--ark-ease),box-shadow var(--ark-ease),border-color var(--ark-ease);
}
.ark-stat:hover{transform:translateY(-3px);box-shadow:var(--ark-sh-2);border-color:#d8d0c1}
.ark-stat b{
  font-family:var(--ark-num);font-size:26px;line-height:1;
  color:var(--ark-ink);font-variant-numeric:tabular-nums;
}
.ark-stat span{font-size:12.5px;line-height:1.45;color:var(--ark-ink-2)}

/* ---------- sections ---------- */
.ark-section{padding:80px 0}
.ark-section-alt{background:linear-gradient(180deg,#FFFFFF 0%,var(--ark-bg) 100%)}
.ark-section-head{max-width:720px;margin-bottom:32px}
.ark-eyebrow{
  display:block;margin-bottom:10px;
  font-size:12.5px;font-weight:700;letter-spacing:.16em;
  color:var(--ark-primary);
}
.ark-eyebrow.light{color:#5FD6B7}
.ark-section-head h2{font-size:clamp(22px,2.6vw,30px);line-height:1.28;font-weight:700}
.ark-section-head p{margin-top:12px;font-size:15.5px;line-height:1.8;color:var(--ark-ink-2)}

.ark-filterbar{display:flex;gap:8px;overflow-x:auto;padding:4px 0 22px;scrollbar-width:none}
.ark-filterbar::-webkit-scrollbar{display:none}

/* timeline */
.ark-timeline{display:flex;flex-direction:column;border-top:1px solid var(--ark-line)}
.ark-tl-item{
  display:grid;grid-template-columns:132px 1fr;gap:32px;
  padding:28px 20px 28px 16px;
  border-bottom:1px solid var(--ark-line);
  transition:background var(--ark-ease),padding-left var(--ark-ease);
}
.ark-tl-item:hover{background:var(--ark-surface-2);padding-left:24px}
.ark-tl-date{
  font-family:var(--ark-num);font-size:38px;line-height:1;
  color:var(--ark-primary);letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
}
.ark-tl-date small{
  display:block;margin-top:10px;
  font-family:var(--ark-font);font-size:12.5px;font-weight:600;
  letter-spacing:.06em;color:var(--ark-ink-2);
}
.ark-tl-body h3{font-size:20px;line-height:1.4;margin-bottom:8px}
.ark-tl-body p{margin:0 0 12px;font-size:15px;line-height:1.85;max-width:62ch}

/* scenario */
.ark-split{display:grid;grid-template-columns:1fr 380px;gap:48px;align-items:start}
.ark-row-list{display:flex;flex-direction:column;border-top:1px solid var(--ark-line)}
.ark-row{display:flex;gap:18px;padding:22px 0;border-bottom:1px solid var(--ark-line)}
.ark-row .n{
  flex:0 0 auto;min-width:40px;font-family:var(--ark-num);
  font-size:22px;line-height:1.5;color:var(--ark-primary);
  font-variant-numeric:tabular-nums;
}
.ark-row h3{font-size:17px;line-height:1.45;margin-bottom:6px}
.ark-row p{margin:0;font-size:14.5px;line-height:1.85}
.ark-side-photo{border-radius:var(--ark-r-xl);overflow:hidden;box-shadow:var(--ark-sh-2);background:var(--ark-surface-2)}
.ark-side-photo img{width:100%;aspect-ratio:3/4;object-fit:cover;transition:transform .45s cubic-bezier(.2,.7,.3,1)}
.ark-side-photo:hover img{transform:scale(1.04)}
.ark-side-note{
  margin-top:16px;padding:16px 18px;background:#fff;
  border:1px solid var(--ark-line);border-left:4px solid var(--ark-primary);
  border-radius:var(--ark-r-s);font-size:14px;line-height:1.8;color:var(--ark-ink-2);
}

/* glossary */
.ark-term-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.ark-term{
  padding:22px 24px;background:#fff;
  border:1px solid var(--ark-line);border-radius:var(--ark-r-l);
  box-shadow:var(--ark-sh-1);
  transition:transform var(--ark-ease),box-shadow var(--ark-ease),border-color var(--ark-ease);
}
.ark-term:hover{transform:translateY(-4px);box-shadow:var(--ark-sh-2);border-color:#d8d0c1}
.ark-term h3{display:flex;align-items:center;gap:10px;font-size:17px;margin-bottom:8px}
.ark-term h3 i{font-size:13px;color:var(--ark-accent)}
.ark-term p{margin:0;font-size:14.5px;line-height:1.85}

/* dark panel */
.ark-dark-panel{
  position:relative;overflow:hidden;
  padding:48px;border-radius:var(--ark-r-xl);
  background:var(--ark-dark);box-shadow:var(--ark-sh-2);
}
.ark-dark-panel::before{
  content:"";position:absolute;inset:0;
  background:url(/assets/images/backpic/back-2.webp) center/cover no-repeat;
  opacity:.13;
}
.ark-dark-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.ark-dark-panel h2{color:#fff;font-size:clamp(21px,2.4vw,28px);line-height:1.3;margin-bottom:14px}
.ark-dark-panel p{color:rgba(255,255,255,.76);font-size:15px;line-height:1.85;margin:0}
.ark-dark-list{display:flex;flex-direction:column}
.ark-dark-list li{
  display:flex;gap:14px;padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,.14);
  font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.76);
}
.ark-dark-list li:last-child{border-bottom:0}
.ark-dark-list b{flex:0 0 auto;font-family:var(--ark-num);font-size:13px;color:#5FD6B7;line-height:1.9}

/* faq */
.ark-faq{display:flex;flex-direction:column;gap:12px;max-width:880px}
.ark-faq details{
  background:#fff;border:1px solid var(--ark-line);border-radius:var(--ark-r-m);
  padding:0 22px;box-shadow:var(--ark-sh-1);
  transition:border-color var(--ark-ease),box-shadow var(--ark-ease);
}
.ark-faq details:hover{border-color:#d8d0c1}
.ark-faq details[open]{border-color:rgba(18,160,133,.55);box-shadow:var(--ark-sh-2)}
.ark-faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 0;font-size:16px;font-weight:600;color:var(--ark-ink);
}
.ark-faq summary::-webkit-details-marker{display:none}
.ark-faq summary .ic{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  background:var(--ark-primary-soft);color:var(--ark-primary);
  display:grid;place-items:center;font-size:11px;
  transition:transform var(--ark-ease),background var(--ark-ease),color var(--ark-ease);
}
.ark-faq details[open] summary .ic{transform:rotate(180deg);background:var(--ark-primary);color:#fff}
.ark-faq .ans{padding:0 0 20px;max-width:70ch;font-size:15px;line-height:1.9;color:var(--ark-ink-2)}

/* cta */
.ark-cta{
  position:relative;overflow:hidden;
  display:flex;align-items:center;justify-content:space-between;gap:32px;
  padding:48px;border-radius:var(--ark-r-xl);
  background:var(--ark-grad-brand);color:#fff;
  box-shadow:var(--ark-sh-2);
}
.ark-cta::before,.ark-cta::after{
  content:"";position:absolute;border-radius:50%;pointer-events:none;
  border:1px solid rgba(255,255,255,.22);
}
.ark-cta::before{width:320px;height:320px;right:-90px;top:-140px}
.ark-cta::after{width:200px;height:200px;right:70px;bottom:-120px;border-color:rgba(255,255,255,.16)}
.ark-cta > div{position:relative;z-index:1}
.ark-cta h2{color:#fff;font-size:clamp(22px,2.4vw,28px);line-height:1.3}
.ark-cta p{color:rgba(255,255,255,.88);font-size:15px;line-height:1.85;margin:10px 0 0;max-width:54ch}

/* footer */
.ark-footer{background:var(--ark-dark);color:rgba(255,255,255,.72);padding:64px 0 28px;margin-top:80px}
.ark-footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.ark-footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.ark-footer-brand .ark-logo-mark{width:38px;height:38px;font-size:17px;box-shadow:none}
.ark-footer-brand strong{display:block;color:#fff;font-size:16px;line-height:1.3;font-weight:700}
.ark-footer-brand em{font-style:normal;font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.6)}
.ark-footer h4{color:#fff;font-size:15px;font-weight:700;margin-bottom:14px}
.ark-footer p{color:rgba(255,255,255,.72);font-size:14px;line-height:1.85;margin:0}
.ark-footer ul li{margin-bottom:10px}
.ark-footer ul li:last-child{margin-bottom:0}
.ark-footer a{color:rgba(255,255,255,.72);font-size:14px;transition:color var(--ark-ease)}
.ark-footer a:hover{color:#fff}
.ark-footer-bottom{
  margin-top:40px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px 24px;
  font-size:12.5px;color:rgba(255,255,255,.55);
}
.ark-disclaim{max-width:720px;line-height:1.7}

/* ---------- responsive ---------- */
@media (min-width:1400px){
  .ark-container{max-width:1280px}
}
@media (max-width:1199px){
  .ark-search input{width:112px}
  .ark-nav a{padding:8px 9px;font-size:14px}
  .ark-nav a::after{left:9px;right:9px}
  .ark-hero-grid{gap:36px}
  .ark-split{grid-template-columns:1fr 320px;gap:36px}
}
@media (max-width:991px){
  .ark-nav{display:none}
  .ark-burger{display:inline-flex}
  .ark-topbar-actions .ark-btn{display:none}
  .ark-hero-grid{grid-template-columns:1fr;gap:36px}
  .ark-hero-visual{max-width:340px;margin:0 auto}
  .ark-statbar{grid-template-columns:repeat(2,1fr);margin-top:40px}
  .ark-split{grid-template-columns:1fr}
  .ark-side-photo{max-width:420px}
  .ark-dark-grid{grid-template-columns:1fr;gap:28px}
  .ark-dark-panel{padding:36px}
  .ark-cta{flex-direction:column;align-items:flex-start;padding:36px}
  .ark-footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .ark-section{padding:64px 0}
}
@media (max-width:767px){
  .ark-container{padding:0 16px}
  .ark-topbar-inner{height:64px}
  .ark-search{display:none}
  .ark-hero{padding:28px 0 48px}
  .ark-hero-sub{font-size:15.5px;margin-bottom:22px}
  .ark-hero-actions .ark-btn{flex:1 1 auto}
  .ark-float-badge{top:-10px;right:0;padding:10px 12px}
  .ark-section{padding:48px 0}
  .ark-tl-item{grid-template-columns:1fr;gap:12px;padding:22px 8px 22px 0}
  .ark-tl-item:hover{padding-left:0}
  .ark-tl-date{font-size:28px;display:flex;align-items:baseline;gap:12px}
  .ark-tl-date small{margin-top:0}
  .ark-term-grid{grid-template-columns:1fr}
  .ark-dark-panel{padding:26px;border-radius:var(--ark-r-l)}
  .ark-cta{padding:28px;border-radius:var(--ark-r-l)}
  .ark-faq details{padding:0 16px}
  .ark-faq summary{font-size:15px;padding:16px 0}
  .ark-footer-grid{grid-template-columns:1fr;gap:28px}
  .ark-footer{padding:44px 0 24px;margin-top:56px}
  .ark-statbar{gap:12px}
}
@media (max-width:519px){
  .ark-brand-text em{letter-spacing:.1em}
  .ark-hero-photo{aspect-ratio:1/1}
  .ark-stat{padding:14px}
  .ark-stat b{font-size:22px}
  .ark-row{gap:12px}
  .ark-row .n{min-width:32px;font-size:19px}
  .ark-hero-actions .ark-btn{width:100%}
}

/* roulang page: category4 */
:root{
  --ark-primary:#0E7C66;
  --ark-primary-2:#12A085;
  --ark-primary-soft:#E3F3EE;
  --ark-accent:#FF7A45;
  --ark-accent-soft:#FFEDE4;
  --ark-badge:#FFC53D;
  --ark-ink:#16221F;
  --ark-ink-2:#5A6B66;
  --ark-line:#E8E2D7;
  --ark-bg:#FBF8F3;
  --ark-surface:#FFFFFF;
  --ark-surface-2:#F4EFE6;
  --ark-dark:#0B2A24;
  --ark-grad-brand:linear-gradient(135deg,#0E7C66 0%,#12A085 55%,#3FC79E 100%);
  --ark-grad-warm:linear-gradient(135deg,#FF7A45 0%,#FFB27A 100%);
  --ark-font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ark-num:"DIN Alternate","Bahnschrift",ui-monospace,"SF Mono",Menlo,monospace;
  --ark-r-s:10px;
  --ark-r-m:16px;
  --ark-r-l:22px;
  --ark-r-xl:28px;
  --ark-r-pill:999px;
  --ark-sh-1:0 2px 8px rgba(16,52,45,.05);
  --ark-sh-2:0 10px 28px rgba(16,52,45,.09);
  --ark-sh-3:0 18px 44px rgba(16,52,45,.14);
  --ark-focus:0 0 0 4px rgba(18,160,133,.22);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--ark-font);
  font-size:16px;
  line-height:1.8;
  color:var(--ark-ink);
  background:var(--ark-bg);
  -webkit-font-smoothing:antialiased;
}
body.ark-lock{overflow:hidden}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
a{color:var(--ark-primary);text-decoration:none;transition:color .22s cubic-bezier(.2,.7,.3,1)}
a:hover{color:var(--ark-primary-2)}
img{max-width:100%;display:block}
button{font-family:inherit}
a:focus-visible,button:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:none;box-shadow:var(--ark-focus);border-radius:8px}
.ark-container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.ark-logo-mark{
  width:44px;height:44px;flex:0 0 auto;border-radius:14px;
  display:grid;place-items:center;
  background:var(--ark-grad-brand);color:#fff;
  font-weight:800;font-size:20px;letter-spacing:.02em;
  box-shadow:var(--ark-sh-1);
}
/* ---------- header ---------- */
.ark-header{
  position:sticky;top:0;z-index:120;
  background:rgba(251,248,243,.93);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--ark-line);
  transition:box-shadow .22s cubic-bezier(.2,.7,.3,1);
}
.ark-header.is-stuck{box-shadow:var(--ark-sh-1)}
.ark-topbar{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:13px 0;transition:padding .22s ease}
.ark-header.is-stuck .ark-topbar{padding:8px 0}
.ark-brand{display:flex;align-items:center;gap:12px;text-decoration:none;flex:0 0 auto}
.ark-brand-text strong{display:block;font-size:18px;font-weight:800;color:var(--ark-ink);line-height:1.2;letter-spacing:-.01em}
.ark-brand-text em{display:block;font-style:normal;font-size:11px;letter-spacing:.12em;color:var(--ark-ink-2);margin-top:3px}
.ark-topbar-right{display:flex;align-items:center;gap:14px}
.ark-search{
  display:flex;align-items:center;gap:9px;height:44px;padding:0 16px;
  background:var(--ark-surface-2);border-radius:var(--ark-r-pill);
  border:1.5px solid transparent;color:var(--ark-ink-2);
  transition:background .22s,border-color .22s,box-shadow .22s;
}
.ark-search:focus-within{background:#fff;border-color:var(--ark-primary);box-shadow:var(--ark-focus)}
.ark-search i{font-size:13px}
.ark-search input{border:0;background:transparent;outline:none;font:inherit;font-size:14px;color:var(--ark-ink);width:168px}
.ark-search input::placeholder{color:#8B9995}
.ark-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border:0;border-radius:var(--ark-r-pill);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s,background .22s,color .22s,border-color .22s;
}
.ark-btn-sm{height:42px;padding:0 20px;font-size:14px}
.ark-btn-primary{background:var(--ark-grad-brand);color:#fff;box-shadow:var(--ark-sh-1)}
.ark-btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:var(--ark-sh-2);filter:brightness(1.05)}
.ark-btn-primary:active{transform:translateY(0);box-shadow:var(--ark-sh-1)}
.ark-btn-ghost{background:#fff;color:var(--ark-primary);border:1.5px solid var(--ark-line)}
.ark-btn-ghost:hover{color:var(--ark-primary-2);border-color:var(--ark-primary);transform:translateY(-2px);box-shadow:var(--ark-sh-1)}
.ark-btn-ghost:active{transform:translateY(0)}
.ark-burger{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--ark-line);background:#fff;cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:4px;
  transition:border-color .22s,box-shadow .22s;
}
.ark-burger:hover{border-color:var(--ark-primary)}
.ark-burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ark-ink)}
.ark-navbar{display:flex;align-items:center;gap:8px;padding-bottom:10px}
.ark-nav{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.ark-nav::-webkit-scrollbar{display:none}
.ark-nav a{
  position:relative;display:inline-block;white-space:nowrap;
  padding:9px 14px;border-radius:var(--ark-r-pill);
  font-size:15px;font-weight:600;color:var(--ark-ink-2);
  transition:color .22s,background .22s;
}
.ark-nav a:hover{color:var(--ark-primary);background:var(--ark-primary-soft)}
.ark-nav a.is-active{color:var(--ark-primary)}
.ark-nav a.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:3px;border-radius:3px;background:var(--ark-primary);
}
.ark-hotrow{display:flex;align-items:center;gap:10px;padding:0 0 12px}
.ark-hotrow-label{font-size:12.5px;letter-spacing:.02em;color:var(--ark-ink-2);flex:0 0 auto}
.ark-chips{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;padding:2px 0}
.ark-chips::-webkit-scrollbar{display:none}
.ark-chip{
  display:inline-block;white-space:nowrap;flex:0 0 auto;
  padding:5px 13px;border-radius:var(--ark-r-pill);
  background:var(--ark-surface-2);color:var(--ark-ink-2);
  font-size:13px;transition:background .22s,color .22s;
}
.ark-chip:hover{background:var(--ark-primary-soft);color:var(--ark-primary)}
/* ---------- drawer ---------- */
.ark-overlay{
  position:fixed;inset:0;background:rgba(11,42,36,.44);z-index:150;
  opacity:0;pointer-events:none;transition:opacity .28s ease;
}
.ark-overlay.is-open{opacity:1;pointer-events:auto}
.ark-drawer{
  position:fixed;top:0;right:0;bottom:0;width:84vw;max-width:360px;z-index:200;
  background:#fff;border-radius:24px 0 0 24px;padding:22px;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.2,.7,.3,1);
  display:flex;flex-direction:column;gap:10px;overflow-y:auto;
  box-shadow:var(--ark-sh-3);
}
.ark-drawer.is-open{transform:translateX(0)}
.ark-drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:6px}
.ark-drawer-head span{font-size:15px;font-weight:700;color:var(--ark-ink)}
.ark-drawer-close{
  width:38px;height:38px;border-radius:12px;border:1px solid var(--ark-line);
  background:#fff;color:var(--ark-ink-2);cursor:pointer;font-size:16px;
  transition:color .22s,border-color .22s;
}
.ark-drawer-close:hover{color:var(--ark-primary);border-color:var(--ark-primary)}
.ark-drawer nav{display:flex;flex-direction:column;gap:4px;margin:6px 0 12px}
.ark-drawer nav a{
  display:block;padding:13px 14px;border-radius:12px;
  font-size:15px;font-weight:600;color:var(--ark-ink);transition:background .22s,color .22s;
}
.ark-drawer nav a:hover{background:var(--ark-primary-soft);color:var(--ark-primary)}
.ark-drawer nav a.is-active{background:var(--ark-primary-soft);color:var(--ark-primary)}
.ark-drawer .ark-btn{width:100%}
/* ---------- banner ---------- */
.ark-banner{
  position:relative;overflow:hidden;
  padding:30px 0 60px;
  background:
    radial-gradient(720px 320px at 90% -20%, rgba(18,160,133,.16), transparent 70%),
    radial-gradient(560px 260px at 2% 10%, rgba(255,122,69,.13), transparent 72%),
    var(--ark-bg);
}
.ark-breadcrumb{display:flex;align-items:center;gap:8px;font-size:14px;color:var(--ark-ink-2);margin-bottom:26px;flex-wrap:wrap}
.ark-breadcrumb a{color:var(--ark-ink-2)}
.ark-breadcrumb a:hover{color:var(--ark-primary);text-decoration:underline;text-underline-offset:4px}
.ark-breadcrumb span.sep{color:#B9C2BF}
.ark-breadcrumb .cur{color:var(--ark-ink);font-weight:600}
.ark-banner-inner{display:grid;grid-template-columns:minmax(0,1fr) 400px;gap:48px;align-items:center}
.ark-eyebrow{
  display:inline-block;padding:6px 14px;border-radius:var(--ark-r-pill);
  background:var(--ark-primary-soft);color:var(--ark-primary);
  font-size:12.5px;font-weight:700;letter-spacing:.06em;
}
.ark-banner h1{
  margin:18px 0 14px;
  font-size:clamp(26px,3.4vw,40px);line-height:1.22;font-weight:800;letter-spacing:-.02em;
  color:var(--ark-ink);
}
.ark-banner-sub{font-size:16px;color:var(--ark-ink-2);max-width:34em}
.ark-banner-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.ark-trust{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:24px}
.ark-trust li{display:flex;align-items:center;gap:7px;font-size:13.5px;color:var(--ark-ink-2)}
.ark-trust i{color:var(--ark-primary);font-size:13px}
.ark-banner-media{position:relative}
.ark-banner-media img{
  width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--ark-r-xl);border:1px solid var(--ark-line);
  box-shadow:var(--ark-sh-2);
}
.ark-media-badge{
  position:absolute;right:-12px;bottom:-14px;
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 16px;border-radius:var(--ark-r-pill);
  background:#fff;box-shadow:var(--ark-sh-2);border:1px solid var(--ark-line);
  font-size:13px;font-weight:600;color:var(--ark-ink);
}
.ark-media-badge::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--ark-badge)}
/* ---------- sections ---------- */
.ark-section{padding:78px 0}
.ark-section.is-tint{background:var(--ark-surface-2)}
.ark-section-head{max-width:760px;margin-bottom:38px}
.ark-section-head h2{
  margin:14px 0 12px;
  font-size:clamp(22px,2.6vw,30px);line-height:1.3;font-weight:700;letter-spacing:-.01em;
}
.ark-section-head p{font-size:15.5px;color:var(--ark-ink-2)}
/* ---------- device cards ---------- */
.ark-device-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.ark-device-card{
  display:flex;flex-direction:column;
  background:var(--ark-surface);border:1px solid var(--ark-line);
  border-radius:var(--ark-r-l);padding:20px;
  box-shadow:var(--ark-sh-1);
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s,border-color .22s;
}
.ark-device-card:hover{transform:translateY(-4px);box-shadow:var(--ark-sh-3);border-color:#DCD3C4}
.ark-pill{
  align-self:flex-start;display:inline-block;margin-bottom:14px;
  padding:5px 13px;border-radius:var(--ark-r-pill);
  background:var(--ark-primary-soft);color:var(--ark-primary);
  font-size:12.5px;font-weight:700;letter-spacing:.02em;
}
.ark-pill.is-warm{background:var(--ark-accent-soft);color:#C34A17}
.ark-device-media{
  aspect-ratio:4/5;border-radius:var(--ark-r-m);overflow:hidden;
  background:var(--ark-surface-2);margin-bottom:16px;
}
.ark-device-media img{width:100%;height:100%;object-fit:cover;transition:transform .3s cubic-bezier(.2,.7,.3,1)}
.ark-device-card:hover .ark-device-media img{transform:scale(1.04)}
.ark-device-card h3{font-size:19px;font-weight:700;line-height:1.4;margin-bottom:8px}
.ark-card-lead{font-size:14px;color:var(--ark-ink-2);line-height:1.75;margin-bottom:14px}
.ark-specs{margin-top:auto}
.ark-spec{
  display:flex;align-items:flex-start;justify-content:space-between;gap:14px;
  padding:10px 0;border-top:1px dashed var(--ark-line);font-size:13.5px;
}
.ark-spec dt{color:var(--ark-ink-2);flex:0 0 auto}
.ark-spec dd{margin:0;color:var(--ark-ink);font-weight:600;text-align:right;line-height:1.6}
/* ---------- flow ---------- */
.ark-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.ark-flow-step{
  position:relative;background:var(--ark-surface);border:1px solid var(--ark-line);
  border-radius:var(--ark-r-l);padding:24px 22px 22px;box-shadow:var(--ark-sh-1);
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s;
}
.ark-flow-step:hover{transform:translateY(-4px);box-shadow:var(--ark-sh-2)}
.ark-flow-num{
  display:inline-block;font-family:var(--ark-num);font-variant-numeric:tabular-nums;
  font-size:26px;font-weight:700;color:var(--ark-primary);line-height:1;margin-bottom:14px;
}
.ark-flow-step h3{font-size:16.5px;font-weight:700;margin-bottom:8px}
.ark-flow-step p{font-size:14px;color:var(--ark-ink-2);line-height:1.75}
/* ---------- requirements ---------- */
.ark-req-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.ark-req-panel{
  background:var(--ark-surface);border:1px solid var(--ark-line);
  border-radius:var(--ark-r-l);padding:26px;box-shadow:var(--ark-sh-1);
}
.ark-req-panel-head{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.ark-req-icon{
  width:44px;height:44px;border-radius:14px;display:grid;place-items:center;
  background:var(--ark-primary-soft);color:var(--ark-primary);font-size:17px;flex:0 0 auto;
}
.ark-req-panel h3{font-size:18px;font-weight:700;line-height:1.3}
.ark-req-row{
  display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:13px 0;border-top:1px solid var(--ark-line);font-size:14px;
}
.ark-req-row:first-of-type{border-top:0}
.ark-req-row span{color:var(--ark-ink-2);flex:0 0 auto}
.ark-req-row strong{font-weight:600;color:var(--ark-ink);text-align:right;line-height:1.6}
/* ---------- faq ---------- */
.ark-faq{max-width:860px}
.ark-faq-item{
  background:var(--ark-surface);border:1px solid var(--ark-line);
  border-radius:var(--ark-r-m);margin-bottom:12px;overflow:hidden;
  transition:border-color .22s,box-shadow .22s;
}
.ark-faq-item.is-open{border-color:rgba(14,124,102,.4);box-shadow:var(--ark-sh-2)}
.ark-faq-btn{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:18px 22px;border:0;background:none;cursor:pointer;
  font-size:15.5px;font-weight:600;color:var(--ark-ink);text-align:left;line-height:1.6;
  transition:color .22s;
}
.ark-faq-btn:hover{color:var(--ark-primary)}
.ark-faq-btn i{font-size:13px;color:var(--ark-primary);transition:transform .28s cubic-bezier(.2,.7,.3,1);flex:0 0 auto}
.ark-faq-item.is-open .ark-faq-btn i{transform:rotate(180deg)}
.ark-faq-body{max-height:0;overflow:hidden;transition:max-height .32s ease}
.ark-faq-body p{padding:0 22px 20px;font-size:14.5px;color:var(--ark-ink-2);line-height:1.85}
/* ---------- cta ---------- */
.ark-cta-wrap{padding:0 0 84px}
.ark-cta{
  position:relative;overflow:hidden;
  background:var(--ark-grad-brand);
  border-radius:var(--ark-r-xl);
  padding:48px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
  box-shadow:var(--ark-sh-2);
}
.ark-cta::before,.ark-cta::after{
  content:"";position:absolute;border-radius:50%;
  border:1px solid rgba(255,255,255,.22);
}
.ark-cta::before{width:260px;height:260px;right:-70px;top:-90px}
.ark-cta::after{width:170px;height:170px;right:60px;bottom:-90px;border-color:rgba(255,255,255,.16)}
.ark-cta-text{position:relative;z-index:1;max-width:640px}
.ark-cta h2{font-size:clamp(21px,2.4vw,28px);font-weight:800;color:#fff;line-height:1.35;margin-bottom:10px}
.ark-cta p{font-size:14.5px;color:rgba(255,255,255,.86);line-height:1.8}
.ark-cta .ark-btn{
  position:relative;z-index:1;flex:0 0 auto;
  background:#fff;color:var(--ark-primary);box-shadow:var(--ark-sh-2);
}
.ark-cta .ark-btn:hover{color:var(--ark-primary-2);transform:translateY(-2px);box-shadow:var(--ark-sh-3)}
/* ---------- footer ---------- */
.ark-footer{background:var(--ark-dark);color:rgba(255,255,255,.72);padding-top:56px;font-size:14px}
.ark-footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:40px}
.ark-footer h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.ark-footer ul{display:flex;flex-direction:column;gap:10px}
.ark-footer a{color:rgba(255,255,255,.72);font-size:14px}
.ark-footer a:hover{color:#fff}
.ark-footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.ark-footer-brand strong{display:block;color:#fff;font-size:16px;line-height:1.2}
.ark-footer-brand em{display:block;font-style:normal;font-size:11px;letter-spacing:.12em;color:rgba(255,255,255,.55);margin-top:3px}
.ark-footer p{line-height:1.85;color:rgba(255,255,255,.66)}
.ark-footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:18px 0 22px;display:flex;flex-wrap:wrap;gap:10px 24px;
  justify-content:space-between;font-size:12.5px;color:rgba(255,255,255,.5);
}
.ark-disclaim{max-width:640px;line-height:1.7}
/* ---------- responsive ---------- */
@media (max-width:1399px){
  .ark-container{max-width:1200px}
}
@media (max-width:1199px){
  .ark-banner-inner{grid-template-columns:minmax(0,1fr) 340px;gap:36px}
}
@media (max-width:991px){
  .ark-search{display:none}
  .ark-banner-inner{grid-template-columns:1fr;gap:32px}
  .ark-banner-media{max-width:520px}
  .ark-device-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ark-flow{grid-template-columns:repeat(2,minmax(0,1fr))}
  .ark-footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .ark-section{padding:64px 0}
  .ark-cta{padding:38px;flex-direction:column;align-items:flex-start;gap:24px}
}
@media (max-width:767px){
  .ark-container{padding:0 16px}
  .ark-nav{display:none}
  .ark-burger{display:flex}
  .ark-topbar-right{gap:10px}
  .ark-topbar-right .ark-btn-sm{display:none}
  .ark-banner{padding:20px 0 44px}
  .ark-breadcrumb{margin-bottom:20px;font-size:13px}
  .ark-trust{gap:8px 16px}
  .ark-trust li{font-size:12.5px}
  .ark-section{padding:48px 0}
  .ark-section-head{margin-bottom:26px}
  .ark-device-grid{
    display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;
    padding-bottom:14px;margin:0 -16px;padding-left:16px;padding-right:16px;
  }
  .ark-device-card{flex:0 0 82%;scroll-snap-align:start}
  .ark-flow{grid-template-columns:1fr}
  .ark-req-grid{grid-template-columns:1fr}
  .ark-req-panel{padding:20px}
  .ark-cta{padding:28px 22px;border-radius:var(--ark-r-l)}
  .ark-footer-grid{grid-template-columns:1fr;gap:28px}
  .ark-footer-bottom{flex-direction:column;font-size:12px}
  .ark-media-badge{right:8px;bottom:-12px;font-size:12px;padding:8px 13px}
}
@media (max-width:519px){
  .ark-banner h1{font-size:26px}
  .ark-device-card{flex:0 0 88%}
  .ark-btn{width:100%}
  .ark-banner-actions .ark-btn{width:100%}
  .ark-cta .ark-btn{width:100%}
}

/* roulang page: category5 */
:root{
  --ark-primary:#0E7C66;
  --ark-primary-2:#12A085;
  --ark-primary-soft:#E3F3EE;
  --ark-accent:#FF7A45;
  --ark-accent-soft:#FFEDE4;
  --ark-badge:#FFC53D;
  --ark-ink:#16221F;
  --ark-ink-2:#5A6B66;
  --ark-line:#E8E2D7;
  --ark-bg:#FBF8F3;
  --ark-surface:#FFFFFF;
  --ark-surface-2:#F4EFE6;
  --ark-dark:#0B2A24;
  --ark-grad-brand:linear-gradient(135deg,#0E7C66 0%,#12A085 55%,#3FC79E 100%);
  --ark-grad-warm:linear-gradient(135deg,#FF7A45 0%,#FFB27A 100%);
  --ark-font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --ark-num:"DIN Alternate","Bahnschrift",ui-monospace,"SF Mono",Menlo,monospace;
  --ark-r-s:10px;
  --ark-r-m:16px;
  --ark-r-l:22px;
  --ark-r-xl:28px;
  --ark-r-pill:999px;
  --ark-sh-1:0 2px 8px rgba(16,52,45,.05);
  --ark-sh-2:0 10px 28px rgba(16,52,45,.09);
  --ark-sh-3:0 18px 44px rgba(16,52,45,.14);
  --ark-focus:0 0 0 4px rgba(18,160,133,.22);
  --ark-ease:.22s cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  font-family:var(--ark-font);
  font-size:16px;
  line-height:1.8;
  color:var(--ark-ink);
  background:var(--ark-bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--ark-primary);text-decoration:none;transition:color var(--ark-ease);}
a:hover{color:var(--ark-primary-2);}
button{font-family:inherit;}
h1,h2,h3,h4,h5{margin:0;color:var(--ark-ink);font-weight:700;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
[hidden]{display:none !important;}
::selection{background:var(--ark-primary-soft);color:var(--ark-primary);}
:focus-visible{outline:none;box-shadow:var(--ark-focus);border-radius:var(--ark-r-s);}

.ark-container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
@media (min-width:1400px){
  .ark-container{max-width:1280px;}
}

/* ============ 顶部导航 ============ */
.ark-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(251,248,243,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--ark-line);
  transition:box-shadow var(--ark-ease),background var(--ark-ease);
}
.ark-header.is-stuck{box-shadow:var(--ark-sh-1);}
.ark-topbar{
  display:flex;
  align-items:center;
  gap:20px;
  min-height:72px;
  transition:min-height var(--ark-ease);
}
.ark-header.is-stuck .ark-topbar{min-height:56px;}
.ark-brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.ark-brand:hover{color:inherit;}
.ark-logo-mark{
  width:38px;height:38px;
  border-radius:12px;
  background:var(--ark-grad-brand);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:19px;
  font-weight:800;
  box-shadow:var(--ark-sh-1);
  flex:0 0 auto;
}
.ark-brand-text{display:flex;flex-direction:column;line-height:1.15;}
.ark-brand-text strong{font-size:17px;font-weight:800;color:var(--ark-ink);letter-spacing:-.01em;}
.ark-brand-text em{
  font-style:normal;
  font-size:11px;
  color:var(--ark-ink-2);
  letter-spacing:.06em;
  margin-top:2px;
}
.ark-nav{
  display:flex;
  align-items:center;
  gap:22px;
  margin-left:12px;
  flex:1 1 auto;
  min-width:0;
  overflow:hidden;
}
.ark-nav a{
  position:relative;
  font-size:15px;
  color:var(--ark-ink-2);
  font-weight:500;
  white-space:nowrap;
  padding:6px 0;
}
.ark-nav a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-2px;
  height:3px;
  border-radius:3px;
  background:var(--ark-primary);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform var(--ark-ease);
}
.ark-nav a:hover{color:var(--ark-primary);}
.ark-nav a:hover::after{transform:scaleX(1);}
.ark-nav a.is-active{color:var(--ark-primary);font-weight:700;}
.ark-nav a.is-active::after{transform:scaleX(1);}
.ark-topbar-actions{display:flex;align-items:center;gap:10px;margin-left:auto;flex:0 0 auto;}
.ark-search-mini{
  display:flex;
  align-items:center;
  background:var(--ark-surface-2);
  border-radius:var(--ark-r-pill);
  height:40px;
  padding:0 4px 0 14px;
  border:1.5px solid transparent;
  transition:border-color var(--ark-ease),background var(--ark-ease);
}
.ark-search-mini:focus-within{border-color:var(--ark-primary);background:var(--ark-surface);}
.ark-search-mini input{
  border:0;
  background:transparent;
  outline:none;
  font-size:14px;
  color:var(--ark-ink);
  width:132px;
}
.ark-search-mini input::placeholder{color:#8B9A95;}
.ark-search-mini button{
  border:0;
  background:transparent;
  color:var(--ark-primary);
  width:32px;height:32px;
  border-radius:50%;
  cursor:pointer;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  transition:background var(--ark-ease);
}
.ark-search-mini button:hover{background:var(--ark-primary-soft);}
.ark-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--ark-r-pill);
  font-size:15px;
  font-weight:600;
  border:1.5px solid transparent;
  cursor:pointer;
  transition:transform var(--ark-ease),box-shadow var(--ark-ease),background var(--ark-ease),color var(--ark-ease),border-color var(--ark-ease);
  padding:0 22px;
  height:48px;
  white-space:nowrap;
}
.ark-btn:active{transform:translateY(1px);}
.ark-btn-primary{
  background:var(--ark-grad-brand);
  color:#fff;
  box-shadow:var(--ark-sh-1);
}
.ark-btn-primary:hover{color:#fff;box-shadow:var(--ark-sh-2);filter:brightness(1.04);transform:translateY(-2px);}
.ark-btn-primary:focus-visible{box-shadow:var(--ark-focus),var(--ark-sh-2);}
.ark-btn-ghost{
  background:var(--ark-surface);
  color:var(--ark-primary);
  border-color:var(--ark-line);
}
.ark-btn-ghost:hover{color:var(--ark-primary);border-color:var(--ark-primary);transform:translateY(-2px);}
.ark-btn-sm{height:40px;font-size:14px;padding:0 18px;}
.ark-btn-light{
  background:#fff;
  color:var(--ark-primary);
  border-color:#fff;
}
.ark-btn-light:hover{color:var(--ark-primary);transform:translateY(-2px);box-shadow:var(--ark-sh-2);}
.ark-link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:14.5px;
  font-weight:600;
  color:var(--ark-primary);
}
.ark-link-arrow i{transition:transform var(--ark-ease);font-size:12px;}
.ark-link-arrow:hover i{transform:translateX(3px);}

.ark-hotbar{border-top:1px solid var(--ark-line);background:rgba(244,239,230,.55);}
.ark-hotbar-inner{
  display:flex;
  align-items:center;
  gap:10px;
  height:44px;
  overflow-x:auto;
  scrollbar-width:none;
}
.ark-hotbar-inner::-webkit-scrollbar{display:none;}
.ark-hotbar-label{
  font-size:12.5px;
  color:var(--ark-ink-2);
  letter-spacing:.08em;
  flex:0 0 auto;
}
.ark-chip{
  flex:0 0 auto;
  font-size:13px;
  color:var(--ark-ink-2);
  background:var(--ark-surface-2);
  border:1px solid transparent;
  border-radius:var(--ark-r-pill);
  padding:5px 13px;
  transition:all var(--ark-ease);
  white-space:nowrap;
}
.ark-chip:hover{background:var(--ark-primary-soft);color:var(--ark-primary);border-color:rgba(14,124,102,.18);}

/* 移动抽屉 */
.ark-burger{
  display:none;
  width:42px;height:42px;
  border-radius:12px;
  border:1.5px solid var(--ark-line);
  background:var(--ark-surface);
  color:var(--ark-primary);
  align-items:center;
  justify-content:center;
  cursor:pointer;
  font-size:16px;
  transition:all var(--ark-ease);
}
.ark-burger:hover{border-color:var(--ark-primary);}
.ark-overlay{
  position:fixed;
  inset:0;
  background:rgba(11,42,36,.42);
  opacity:0;
  visibility:hidden;
  transition:opacity var(--ark-ease),visibility var(--ark-ease);
  z-index:1055;
}
.ark-overlay.is-open{opacity:1;visibility:visible;}
.ark-drawer{
  position:fixed;
  top:0;right:0;
  width:84vw;
  max-width:360px;
  height:100%;
  background:var(--ark-surface);
  border-top-left-radius:24px;
  border-bottom-left-radius:24px;
  z-index:1060;
  padding:22px 20px 30px;
  transform:translateX(102%);
  transition:transform var(--ark-ease);
  overflow-y:auto;
  box-shadow:var(--ark-sh-3);
}
.ark-drawer.is-open{transform:translateX(0);}
.ark-drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px;}
.ark-drawer-head strong{font-size:15px;color:var(--ark-ink);}
.ark-drawer-close{
  width:38px;height:38px;
  border-radius:50%;
  border:1.5px solid var(--ark-line);
  background:var(--ark-surface);
  color:var(--ark-ink-2);
  display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;
  transition:all var(--ark-ease);
}
.ark-drawer-close:hover{color:var(--ark-primary);border-color:var(--ark-primary);}
.ark-drawer nav{display:flex;flex-direction:column;gap:2px;margin-bottom:20px;}
.ark-drawer nav a{
  padding:12px 12px;
  border-radius:var(--ark-r-s);
  font-size:15px;
  color:var(--ark-ink-2);
  transition:all var(--ark-ease);
}
.ark-drawer nav a:hover{background:var(--ark-surface-2);color:var(--ark-primary);}
.ark-drawer nav a.is-active{background:var(--ark-primary-soft);color:var(--ark-primary);font-weight:700;}
.ark-drawer .ark-btn{width:100%;}

/* ============ Hero ============ */
.ark-faq-hero{
  position:relative;
  padding:64px 0 56px;
  background-image:linear-gradient(180deg,rgba(251,248,243,.94) 0%,rgba(251,248,243,.98) 62%,#FBF8F3 100%),url("/assets/images/backpic/back-3.webp");
  background-size:cover;
  background-position:center;
  border-bottom:1px solid var(--ark-line);
  overflow:hidden;
}
.ark-faq-hero::before{
  content:"";
  position:absolute;
  width:420px;height:420px;
  right:-120px;top:-160px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(18,160,133,.14) 0%,rgba(18,160,133,0) 70%);
  pointer-events:none;
}
.ark-faq-hero::after{
  content:"";
  position:absolute;
  width:340px;height:340px;
  left:-140px;bottom:-180px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,122,69,.13) 0%,rgba(255,122,69,0) 70%);
  pointer-events:none;
}
.ark-crumbs{
  position:relative;
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ark-ink-2);
  margin-bottom:22px;
  flex-wrap:wrap;
}
.ark-crumbs a{color:var(--ark-ink-2);}
.ark-crumbs a:hover{color:var(--ark-primary);text-decoration:underline;}
.ark-crumbs span.sep{color:#B7C2BE;}
.ark-hero-center{
  position:relative;
  max-width:760px;
  margin:0 auto;
  text-align:center;
}
.ark-hero-tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:var(--ark-primary-soft);
  color:var(--ark-primary);
  font-size:13px;
  font-weight:600;
  padding:6px 15px;
  border-radius:var(--ark-r-pill);
  margin-bottom:18px;
}
.ark-hero-tag i{font-size:11px;}
.ark-hero-center h1{
  font-size:clamp(28px,4.2vw,44px);
  line-height:1.18;
  font-weight:800;
  letter-spacing:-.02em;
  margin-bottom:16px;
}
.ark-hero-center h1 mark{
  background:linear-gradient(180deg,transparent 62%,rgba(255,197,61,.55) 62%);
  color:inherit;
  padding:0 2px;
}
.ark-hero-sub{
  font-size:16px;
  color:var(--ark-ink-2);
  max-width:620px;
  margin:0 auto 28px;
  line-height:1.85;
}
.ark-search-big{
  position:relative;
  max-width:640px;
  margin:0 auto 18px;
}
.ark-search-big input{
  width:100%;
  height:58px;
  border-radius:var(--ark-r-pill);
  border:1.5px solid var(--ark-line);
  background:var(--ark-surface);
  padding:0 130px 0 52px;
  font-size:15.5px;
  color:var(--ark-ink);
  box-shadow:var(--ark-sh-1);
  transition:all var(--ark-ease);
  outline:none;
}
.ark-search-big input::placeholder{color:#93A19C;}
.ark-search-big input:focus{border-color:var(--ark-primary);box-shadow:var(--ark-focus),var(--ark-sh-2);}
.ark-search-big .ark-search-icon{
  position:absolute;
  left:20px;top:50%;
  transform:translateY(-50%);
  color:var(--ark-primary);
  font-size:16px;
  pointer-events:none;
}
.ark-search-big .ark-search-hint{
  position:absolute;
  right:8px;top:50%;
  transform:translateY(-50%);
  height:44px;
  padding:0 20px;
  border-radius:var(--ark-r-pill);
  background:var(--ark-grad-brand);
  color:#fff;
  font-size:14px;
  font-weight:600;
  border:0;
  display:inline-flex;
  align-items:center;
  gap:6px;
  cursor:default;
}
.ark-hero-chips{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:10px;
  max-width:700px;
  margin:0 auto;
}
.ark-hero-chips .ark-chip{background:var(--ark-surface);border-color:var(--ark-line);font-size:13.5px;padding:7px 16px;}
.ark-hero-chips .ark-chip:hover{background:var(--ark-primary-soft);}

/* ============ 快速自查 ============ */
.ark-quickfacts{
  padding:36px 0 0;
}
.ark-fact-row{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;
}
.ark-fact{
  background:var(--ark-surface);
  border:1px solid var(--ark-line);
  border-radius:var(--ark-r-l);
  padding:18px 20px;
  box-shadow:var(--ark-sh-1);
  display:flex;
  align-items:center;
  gap:14px;
  transition:transform var(--ark-ease),box-shadow var(--ark-ease);
}
.ark-fact:hover{transform:translateY(-4px);box-shadow:var(--ark-sh-2);}
.ark-fact .num{
  font-family:var(--ark-num);
  font-variant-numeric:tabular-nums;
  font-size:26px;
  font-weight:700;
  color:var(--ark-primary);
  line-height:1;
}
.ark-fact .txt{font-size:13.5px;color:var(--ark-ink-2);line-height:1.5;}
.ark-fact .txt strong{display:block;font-size:14.5px;color:var(--ark-ink);font-weight:700;margin-bottom:2px;}

/* ============ FAQ 主体 ============ */
.ark-main{padding:56px 0 72px;}
.ark-faq-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:40px;
}
@media (min-width:1200px){
  .ark-faq-layout{grid-template-columns:minmax(0,1fr) 260px;align-items:start;}
}
.ark-faq-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  margin-bottom:26px;
  flex-wrap:wrap;
}
.ark-section-label{
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--ark-primary);
  font-weight:700;
  margin-bottom:8px;
  display:block;
}
.ark-faq-head h2{
  font-size:clamp(22px,2.6vw,30px);
  line-height:1.3;
}
.ark-faq-head p{font-size:14px;color:var(--ark-ink-2);margin-top:6px;}
.ark-filter-status{
  font-size:13px;
  color:var(--ark-ink-2);
  background:var(--ark-surface-2);
  border-radius:var(--ark-r-pill);
  padding:6px 14px;
  white-space:nowrap;
}
.ark-filter-status.is-on{background:var(--ark-primary-soft);color:var(--ark-primary);}

.ark-faq-group{margin-bottom:34px;scroll-margin-top:140px;}
.ark-faq-group:last-child{margin-bottom:0;}
.ark-group-title{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:19px;
  font-weight:700;
  margin-bottom:14px;
  padding-bottom:12px;
  border-bottom:1px solid var(--ark-line);
}
.ark-group-title .dot{
  width:8px;height:8px;
  border-radius:50%;
  background:var(--ark-accent);
  flex:0 0 auto;
}
.ark-group-title .count{
  margin-left:auto;
  font-family:var(--ark-num);
  font-size:12.5px;
  color:var(--ark-ink-2);
  font-weight:500;
  background:var(--ark-surface-2);
  border-radius:var(--ark-r-pill);
  padding:2px 10px;
}
.ark-faq-item{
  background:var(--ark-surface);
  border:1px solid var(--ark-line);
  border-radius:var(--ark-r-m);
  margin-bottom:10px;
  box-shadow:var(--ark-sh-1);
  overflow:hidden;
  transition:border-color var(--ark-ease),box-shadow var(--ark-ease);
}
.ark-faq-item:hover{border-color:rgba(14,124,102,.28);box-shadow:var(--ark-sh-2);}
.ark-faq-q{
  width:100%;
  display:flex;
  align-items:center;
  gap:14px;
  text-align:left;
  background:transparent;
  border:0;
  padding:18px 20px;
  font-size:15.5px;
  font-weight:600;
  color:var(--ark-ink);
  cursor:pointer;
  transition:color var(--ark-ease),background var(--ark-ease);
}
.ark-faq-q:hover{color:var(--ark-primary);}
.ark-faq-q .qmark{
  font-family:var(--ark-num);
  font-size:13px;
  color:var(--ark-primary);
  background:var(--ark-primary-soft);
  border-radius:8px;
  padding:2px 8px;
  flex:0 0 auto;
  font-weight:700;
}
.ark-faq-q .qtext{flex:1 1 auto;line-height:1.6;}
.ark-faq-icon{
  flex:0 0 auto;
  width:26px;height:26px;
  border-radius:50%;
  border:1.5px solid var(--ark-line);
  color:var(--ark-ink-2);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:11px;
  transition:all var(--ark-ease);
}
.ark-faq-q[aria-expanded="true"] .ark-faq-icon{
  background:var(--ark-primary);
  border-color:var(--ark-primary);
  color:#fff;
  transform:rotate(180deg);
}
.ark-faq-q[aria-expanded="true"]{color:var(--ark-primary);}
.ark-faq-a{
  padding:0 20px 20px 58px;
  font-size:15px;
  color:var(--ark-ink-2);
  line-height:1.85;
}
.ark-faq-a p{margin-bottom:10px;}
.ark-faq-a p:last-child{margin-bottom:0;}
.ark-faq-a ul{display:flex;flex-direction:column;gap:6px;margin:10px 0 12px;}
.ark-faq-a li{position:relative;padding-left:16px;}
.ark-faq-a li::before{
  content:"";
  position:absolute;
  left:0;top:11px;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--ark-primary-2);
}
.ark-inline-note{
  display:block;
  background:var(--ark-accent-soft);
  border-left:3px solid var(--ark-accent);
  border-radius:0 var(--ark-r-s) var(--ark-r-s) 0;
  padding:10px 14px;
  font-size:13.5px;
  color:#8A4526;
  margin-top:10px;
}

/* 锚点侧栏 */
.ark-anchor-nav{
  display:none;
  position:sticky;
  top:150px;
}
@media (min-width:1200px){
  .ark-anchor-nav{display:block;}
}
.ark-anchor-card{
  background:var(--ark-surface);
  border:1px solid var(--ark-line);
  border-radius:var(--ark-r-l);
  box-shadow:var(--ark-sh-1);
  padding:20px 18px;
}
.ark-anchor-card h3{
  font-size:14px;
  letter-spacing:.04em;
  color:var(--ark-ink);
  margin-bottom:14px;
  padding-left:10px;
  position:relative;
}
.ark-anchor-card h3::before{
  content:"";
  position:absolute;
  left:0;top:3px;bottom:3px;
  width:3px;
  border-radius:3px;
  background:var(--ark-primary);
}
.ark-anchor-card ul{display:flex;flex-direction:column;gap:2px;}
.ark-anchor-card a{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--ark-ink-2);
  padding:9px 10px;
  border-radius:var(--ark-r-s);
  border-left:3px solid transparent;
  transition:all var(--ark-ease);
}
.ark-anchor-card a:hover,
.ark-anchor-card a.is-current{
  background:var(--ark-primary-soft);
  color:var(--ark-primary);
  border-left-color:var(--ark-primary);
  font-weight:600;
}
.ark-anchor-card .ark-anchor-tip{
  margin-top:16px;
  padding-top:14px;
  border-top:1px dashed var(--ark-line);
  font-size:13px;
  color:var(--ark-ink-2);
  line-height:1.7;
}

/* ============ 未找到答案 ============ */
.ark-help{
  padding:0 0 76px;
}
.ark-help-card{
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);
  gap:0;
  background:var(--ark-surface);
  border:1px solid var(--ark-line);
  border-radius:var(--ark-r-xl);
  overflow:hidden;
  box-shadow:var(--ark-sh-1);
}
.ark-help-text{padding:38px 36px;}
.ark-help-text h2{
  font-size:clamp(20px,2.2vw,26px);
  margin-bottom:12px;
  line-height:1.35;
}
.ark-help-text p{font-size:15px;color:var(--ark-ink-2);margin-bottom:18px;}
.ark-help-list{display:flex;flex-direction:column;gap:10px;margin-bottom:24px;}
.ark-help-list a{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14.5px;
  color:var(--ark-ink);
  background:var(--ark-surface-2);
  border-radius:var(--ark-r-m);
  padding:12px 16px;
  transition:all var(--ark-ease);
}
.ark-help-list a i{color:var(--ark-primary);font-size:13px;}
.ark-help-list a:hover{background:var(--ark-primary-soft);color:var(--ark-primary);transform:translateX(3px);}
.ark-help-media{
  position:relative;
  min-height:280px;
  background:var(--ark-surface-2);
}
.ark-help-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  min-height:280px;
}
.ark-help-media .badge-float{
  position:absolute;
  left:20px;
  bottom:20px;
  background:#fff;
  border-radius:var(--ark-r-m);
  box-shadow:var(--ark-sh-2);
  padding:12px 16px;
  font-size:13px;
  color:var(--ark-ink-2);
  display:flex;
  align-items:center;
  gap:10px;
}
.ark-help-media .badge-float .num{
  font-family:var(--ark-num);
  font-variant-numeric:tabular-nums;
  font-size:22px;
  font-weight:700;
  color:var(--ark-primary);
  line-height:1;
}

/* ============ CTA ============ */
.ark-cta{padding:0 0 80px;}
.ark-cta-card{
  position:relative;
  overflow:hidden;
  background:var(--ark-grad-brand);
  border-radius:var(--ark-r-xl);
  padding:48px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  box-shadow:var(--ark-sh-2);
}
.ark-cta-card::before{
  content:"";
  position:absolute;
  width:300px;height:300px;
  border-radius:50%;
  border:36px solid rgba(255,255,255,.10);
  right:-90px;top:-120px;
}
.ark-cta-card::after{
  content:"";
  position:absolute;
  width:180px;height:180px;
  border-radius:50%;
  border:22px solid rgba(255,255,255,.08);
  right:120px;bottom:-110px;
}
.ark-cta-text{position:relative;z-index:1;max-width:640px;}
.ark-cta-text h2{
  color:#fff;
  font-size:clamp(21px,2.4vw,28px);
  line-height:1.35;
  margin-bottom:10px;
}
.ark-cta-text p{color:rgba(255,255,255,.86);font-size:15px;}
.ark-cta-actions{position:relative;z-index:1;display:flex;gap:12px;flex-wrap:wrap;}

/* ============ 页脚 ============ */
.ark-footer{
  background:var(--ark-dark);
  color:rgba(255,255,255,.72);
  padding:60px 0 26px;
  font-size:14.5px;
  line-height:1.85;
}
.ark-footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:36px;
  padding-bottom:38px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.ark-footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.ark-footer-brand .ark-logo-mark{width:34px;height:34px;font-size:17px;border-radius:10px;}
.ark-footer-brand strong{display:block;color:#fff;font-size:16px;font-weight:700;line-height:1.2;}
.ark-footer-brand em{font-style:normal;font-size:11px;color:rgba(255,255,255,.6);letter-spacing:.06em;}
.ark-footer h4{color:#fff;font-size:15px;margin-bottom:14px;font-weight:700;}
.ark-footer ul{display:flex;flex-direction:column;gap:9px;}
.ark-footer a{color:rgba(255,255,255,.72);font-size:14.5px;}
.ark-footer a:hover{color:#fff;}
.ark-footer p{color:rgba(255,255,255,.68);font-size:13.5px;line-height:1.85;}
.ark-footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding-top:20px;
  font-size:12.5px;
  color:rgba(255,255,255,.55);
}
.ark-footer-bottom .ark-disclaim{max-width:760px;line-height:1.7;}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .ark-nav{display:none;}
  .ark-burger{display:inline-flex;}
  .ark-search-mini{display:none;}
  .ark-fact-row{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:991px){
  .ark-help-card{grid-template-columns:1fr;}
  .ark-help-media{order:-1;min-height:220px;}
  .ark-help-media img{min-height:220px;max-height:280px;}
  .ark-cta-card{flex-direction:column;align-items:flex-start;padding:38px 30px;}
  .ark-footer-grid{grid-template-columns:1fr 1fr;gap:30px;}
}
@media (max-width:767px){
  .ark-container{padding-left:16px;padding-right:16px;}
  .ark-topbar{min-height:64px;gap:12px;}
  .ark-header.is-stuck .ark-topbar{min-height:56px;}
  .ark-brand-text strong{font-size:15.5px;}
  .ark-brand-text em{font-size:10.5px;}
  .ark-hotbar-inner{height:42px;}
  .ark-faq-hero{padding:40px 0 40px;}
  .ark-hero-sub{font-size:15px;margin-bottom:22px;}
  .ark-search-big input{height:54px;padding:0 16px 0 46px;}
  .ark-search-big .ark-search-icon{left:18px;font-size:15px;}
  .ark-search-big .ark-search-hint{display:none;}
  .ark-quickfacts{padding-top:26px;}
  .ark-main{padding:40px 0 52px;}
  .ark-faq-a{padding:0 16px 18px 16px;}
  .ark-faq-q{padding:16px;font-size:15px;gap:10px;}
  .ark-help{padding-bottom:52px;}
  .ark-help-text{padding:26px 20px;}
  .ark-cta{padding-bottom:56px;}
  .ark-cta-card{padding:30px 22px;border-radius:var(--ark-r-l);}
  .ark-cta-actions .ark-btn{width:100%;}
  .ark-footer{padding-top:44px;}
  .ark-footer-grid{grid-template-columns:1fr;gap:26px;padding-bottom:28px;}
  .ark-footer-bottom{flex-direction:column;align-items:flex-start;font-size:12px;}
  .ark-fact-row{grid-template-columns:1fr 1fr;gap:12px;}
  .ark-fact{padding:14px;gap:10px;}
  .ark-fact .num{font-size:22px;}
}
@media (max-width:519px){
  .ark-hero-chips .ark-chip{font-size:12.5px;padding:6px 12px;}
  .ark-fact-row{grid-template-columns:1fr;}
  .ark-group-title{font-size:17px;}
  .ark-faq-head{flex-direction:column;align-items:flex-start;}
}