/* roulang page: index */
:root{
  --bg:#F6F7F4;
  --surface:#FFFFFF;
  --ink:#0F1A15;
  --ink-2:#44524B;
  --muted:#7C8A83;
  --line:#E3E7E1;
  --brand:#10352A;
  --brand-deep:#06201A;
  --accent:#C8F135;
  --accent-2:#FF7A3D;
  --soft:#EEF1EC;
  --shadow-sm:0 1px 2px rgba(15,26,21,.06);
  --shadow-md:0 8px 24px -12px rgba(15,26,21,.18);
  --shadow-lg:0 18px 40px -20px rgba(15,26,21,.28);
  --r-card:18px;
  --r-btn:12px;
  --r-pill:999px;
  --r-input:10px;
  --r-img:14px;
  --nav-h:64px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
.mono{font-family:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-sm{padding:72px 0}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.02em;font-weight:600;
  color:var(--brand);background:var(--soft);
  border-radius:var(--r-pill);padding:6px 14px;
}
.eyebrow i{color:var(--brand)}
h1{font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-.02em}
h2{font-size:28px;line-height:1.35;font-weight:700;letter-spacing:-.01em}
h3{font-size:20px;line-height:1.5;font-weight:700}
.lead{font-size:18px;color:var(--ink-2)}
p.body{max-width:760px;color:var(--ink-2)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:44px}
.section-head .head-text{max-width:640px}
.section-head h2{margin-top:14px}
.section-head p{margin-top:12px;color:var(--ink-2);font-size:16px}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(246,247,244,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:24px;height:var(--nav-h)}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  position:relative;width:28px;height:28px;border-radius:9px;
  background:var(--accent);display:inline-flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-sm);
}
.brand-mark::before{
  content:"";position:absolute;width:14px;height:14px;border-radius:50%;
  border:2px solid var(--brand);border-right-color:transparent;transform:rotate(-35deg);
}
.brand-dot{position:absolute;right:5px;top:5px;width:5px;height:5px;border-radius:50%;background:var(--brand-deep)}
.brand-text{font-size:18px;font-weight:800;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:8px}
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--ink-2);
  padding:6px 0;transition:color .2s ease;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:0;height:2px;width:0;background:var(--accent);
  border-radius:2px;transform:translateX(-50%);transition:width .2s ease;
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{width:100%}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.search-box{
  display:flex;align-items:center;gap:8px;width:240px;height:40px;padding:0 10px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-input);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 2px rgba(200,241,53,.55)}
.search-box i{color:var(--muted);font-size:13px}
.search-box input{border:0;outline:0;background:transparent;width:100%;font-size:14px}
.search-box input::placeholder{color:var(--muted)}
.kbd{
  font-size:11px;line-height:1;color:var(--ink-2);background:var(--soft);
  border:1px solid var(--line);border-radius:6px;padding:5px 6px;white-space:nowrap;
}
.nav-quiet{font-size:15px;font-weight:500;color:var(--ink-2);transition:color .2s ease}
.nav-quiet:hover{color:var(--brand)}
.icon-btn{
  display:none;align-items:center;justify-content:center;width:40px;height:40px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-input);
  cursor:pointer;color:var(--ink)
}
.icon-btn:hover{border-color:var(--brand)}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;padding:12px 24px;border-radius:var(--r-btn);
  border:1px solid transparent;cursor:pointer;transition:all .2s ease;white-space:nowrap;
}
.btn i{transition:transform .2s ease}
.btn:hover i{transform:translateX(4px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);background:var(--surface)}
.btn-lime{background:var(--accent);color:var(--brand-deep)}
.btn-lime:hover{transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-sm{padding:9px 18px;font-size:14px;height:40px}
.btn-block{width:100%}
.btn:focus-visible,a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;
}
.link-underline{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--accent);padding-bottom:2px;transition:border-width .2s ease;
}
.link-underline:hover{border-bottom-width:2px}
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;letter-spacing:.02em;
  padding:4px 12px;border-radius:var(--r-pill);background:var(--soft);color:var(--brand);
}
.badge-lime{background:var(--accent);color:var(--brand-deep);font-weight:600}
.badge-line{background:transparent;border:1px solid var(--line);color:var(--ink-2)}

/* Hero */
.hero{padding:80px 0 84px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.hero h1{margin:22px 0 18px}
.hero .sub{font-size:20px;line-height:1.65;color:var(--brand);font-weight:600;max-width:620px}
.hero .desc{margin-top:18px;max-width:640px;color:var(--ink-2)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.trust-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.trust-row span{
  display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--ink-2);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-pill);
  padding:6px 14px;
}
.trust-row i{color:var(--brand);font-size:12px}
.hero-frame{
  position:relative;border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-md);
  border:1px solid var(--line);background:var(--brand-deep);
}
.hero-frame img{width:100%;aspect-ratio:21/9;object-fit:cover;filter:saturate(1.02)}
.hero-frame::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,32,26,.18),rgba(6,32,26,.55));
}
.hero-frame figcaption{
  position:absolute;left:22px;bottom:18px;right:22px;z-index:2;color:#F2F5F0;
  font-size:14px;display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.hero-stat{
  position:absolute;right:18px;top:18px;z-index:2;background:rgba(255,255,255,.94);
  border-radius:var(--r-img);padding:12px 16px;box-shadow:var(--shadow-md);
}
.hero-stat strong{display:block;font-size:22px;color:var(--brand);line-height:1.2}
.hero-stat span{font-size:12px;color:var(--ink-2)}

/* 痛点 */
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.pain-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px 24px;box-shadow:var(--shadow-sm);transition:all .25s ease;
}
.pain-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:rgba(200,241,53,.7)}
.pain-card.span2{grid-column:span 2}
.pain-num{
  font-size:13px;font-weight:700;color:var(--brand);background:var(--soft);
  border-radius:var(--r-pill);padding:3px 10px;display:inline-block;
}
.pain-card h3{margin:16px 0 10px;font-size:19px}
.pain-card p{font-size:15px;line-height:1.7;color:var(--ink-2)}

/* 方案 */
.solution-top{display:grid;grid-template-columns:7fr 5fr;gap:24px}
.sol-feature{
  position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  background:var(--brand-deep);color:#F2F5F0;display:flex;flex-direction:column;justify-content:flex-end;
  min-height:340px;padding:32px;
}
.sol-feature img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.5}
.sol-feature .veil{position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,32,26,.25),rgba(6,32,26,.86))}
.sol-feature .sol-body{position:relative;z-index:2;max-width:520px}
.sol-feature h3{font-size:24px;margin-bottom:12px;color:#fff}
.sol-feature p{font-size:15px;line-height:1.75;color:rgba(242,245,240,.85)}
.sol-feature .sol-link{margin-top:20px;color:var(--accent)}
.sol-side{display:grid;grid-template-rows:1fr 1fr;gap:24px}
.sol-small{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-sm);transition:all .25s ease;
}
.sol-small:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:rgba(200,241,53,.7)}
.sol-ico{
  width:40px;height:40px;border-radius:12px;background:var(--accent);color:var(--brand-deep);
  display:inline-flex;align-items:center;justify-content:center;font-size:16px;
}
.sol-small h3{margin:16px 0 8px;font-size:18px}
.sol-small p{font-size:15px;line-height:1.7;color:var(--ink-2)}
.solution-bottom{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:24px}
.solution-bottom .sol-small:nth-child(2){transform:translateY(16px)}
.solution-bottom .sol-small:nth-child(2):hover{transform:translateY(14px)}

/* 数据条 */
.stat-band{background:var(--brand-deep);color:#F2F5F0;padding:64px 0}
.stat-band .stat-head{display:flex;flex-wrap:wrap;justify-content:space-between;gap:18px;align-items:center;margin-bottom:36px}
.stat-band h2{color:#fff;font-size:26px}
.stat-band .stat-head p{color:rgba(242,245,240,.72);font-size:15px}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-cell{border-top:1px solid rgba(242,245,240,.18);padding-top:20px}
.stat-cell .num{font-size:40px;font-weight:800;color:var(--accent);line-height:1.1;letter-spacing:-.02em}
.stat-cell .num small{font-size:15px;font-weight:600;margin-left:4px;color:rgba(242,245,240,.8)}
.stat-cell p{margin-top:10px;font-size:14px;color:rgba(242,245,240,.76)}

/* 场景 */
.scene-grid{display:grid;grid-template-columns:5fr 7fr;gap:48px;align-items:center}
.scene-media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-md)}
.scene-media img{width:100%;aspect-ratio:16/11;object-fit:cover}
.scene-list{display:grid;gap:2px;margin-top:24px}
.scene-item{
  display:grid;grid-template-columns:180px 1fr;gap:20px;align-items:start;
  padding:18px 4px;border-top:1px solid var(--line);
}
.scene-item:last-child{border-bottom:1px solid var(--line)}
.scene-item dt{font-size:13px;letter-spacing:.02em;color:var(--muted);font-weight:600;padding-top:2px}
.scene-item dd{font-size:16px;color:var(--ink-2);line-height:1.7}

/* 资讯列表 */
.news-head-link{font-size:15px}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-sm);transition:all .25s ease;height:100%;
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:rgba(200,241,53,.7)}
.post-thumb{display:block;overflow:hidden;background:var(--soft)}
.post-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease}
.post-card:hover .post-thumb img{transform:scale(1.02)}
.post-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.post-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.post-time{font-size:13px;color:var(--muted)}
.post-title{font-size:18px;line-height:1.5;font-weight:700}
.post-title a{transition:color .2s ease}
.post-title a:hover{color:var(--brand)}
.post-sum{font-size:15px;line-height:1.7;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-body .link-underline{margin-top:auto;align-self:flex-start}
.empty-state{
  grid-column:1/-1;text-align:center;padding:56px 24px;background:var(--surface);
  border:1px dashed var(--line);border-radius:var(--r-card);
}
.empty-state i{font-size:26px;color:var(--muted)}
.empty-state p{margin:14px 0 18px;color:var(--ink-2);font-size:15px}

/* FAQ */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  background:transparent;border:0;cursor:pointer;text-align:left;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--ink);
}
.faq-q:hover{color:var(--brand)}
.faq-q .faq-ico{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--soft);
  display:inline-flex;align-items:center;justify-content:center;color:var(--brand);
  font-size:13px;transition:transform .24s ease;
}
.faq-item.is-open .faq-ico{transform:rotate(45deg);background:var(--accent);color:var(--brand-deep)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-a p{padding:0 4px 22px;font-size:16px;line-height:1.8;color:var(--ink-2);max-width:760px}

/* CTA 条 */
.cta-band{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:44px 40px;box-shadow:var(--shadow-md);
  display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center;
}
.cta-band h2{font-size:26px}
.cta-band p{margin-top:12px;color:var(--ink-2);font-size:16px;max-width:560px}
.cta-side{display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.cta-side .hint{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:8px}
.cta-side .hint i{color:var(--brand)}

/* 页脚 */
.site-footer{background:var(--brand-deep);color:#F2F5F0;padding:72px 0 26px;margin-top:96px}
.site-footer .foot-top{border-top:1px solid rgba(242,245,240,.22);padding-top:48px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px}
.foot-brand .brand-text{color:#F2F5F0}
.foot-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(242,245,240,.72);max-width:340px}
.foot-title{font-size:14px;font-weight:600;color:var(--accent);letter-spacing:.02em;margin-bottom:16px}
.foot-links{display:grid;gap:10px}
.foot-links a{font-size:14px;color:rgba(242,245,240,.78);transition:color .2s ease}
.foot-links a:hover{color:var(--accent)}
.foot-contact{display:grid;gap:12px;font-size:14px;color:rgba(242,245,240,.78)}
.foot-contact span{display:flex;gap:10px;align-items:flex-start}
.foot-contact i{color:var(--accent);margin-top:4px;font-size:13px}
.foot-bottom{
  margin-top:48px;padding-top:20px;border-top:1px solid rgba(242,245,240,.16);
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;
  font-size:13px;color:rgba(242,245,240,.55);
}
.foot-bottom a{color:rgba(242,245,240,.7)}
.foot-bottom a:hover{color:var(--accent)}

/* 抽屉 / 搜索 / 弹层 */
.drawer-backdrop,.modal-backdrop{
  position:fixed;inset:0;background:rgba(6,32,26,.45);z-index:90;opacity:0;
  transition:opacity .28s ease;
}
.drawer-backdrop.is-show,.modal-backdrop.is-show{opacity:1}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:320px;max-width:86vw;z-index:95;
  background:var(--surface);box-shadow:var(--shadow-lg);padding:24px 22px;
  transform:translateY(12px);opacity:0;pointer-events:none;
  transition:transform .28s ease,opacity .28s ease;
  display:flex;flex-direction:column;gap:6px;overflow-y:auto;
}
.drawer.is-show{transform:translateY(0);opacity:1;pointer-events:auto}
.drawer .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.drawer a.drawer-link{
  padding:13px 4px;font-size:16px;font-weight:500;color:var(--ink-2);
  border-bottom:1px solid var(--line);
}
.drawer a.drawer-link:hover{color:var(--brand)}
.drawer a.drawer-link.is-active{color:var(--brand);font-weight:700}
.drawer .btn{margin-top:20px}
.search-panel{
  position:fixed;inset:0;z-index:96;background:var(--bg);padding:20px;
  display:none;flex-direction:column;gap:18px;
}
.search-panel.is-show{display:flex}
.search-panel .sp-head{display:flex;gap:12px;align-items:center}
.search-panel input{
  flex:1;height:48px;border:1px solid var(--line);border-radius:var(--r-input);
  background:var(--surface);padding:0 16px;outline:0;
}
.search-panel input:focus{border-color:var(--brand);box-shadow:0 0 0 2px rgba(200,241,53,.55)}
.hot-tags{display:flex;flex-wrap:wrap;gap:10px}
.hot-tags a{
  font-size:14px;padding:8px 14px;border-radius:var(--r-pill);
  background:var(--soft);color:var(--brand);
}
.hot-tags a:hover{background:var(--accent);color:var(--brand-deep)}

.modal-backdrop{display:none;align-items:center;justify-content:center;padding:20px}
.modal-backdrop.is-open{display:flex}
.modal{
  width:480px;max-width:100%;max-height:90vh;overflow-y:auto;background:var(--surface);
  border-radius:var(--r-card);padding:28px;box-shadow:var(--shadow-lg);
  transform:translateY(14px);opacity:0;transition:transform .28s ease,opacity .28s ease;
}
.modal-backdrop.is-show .modal{transform:translateY(0);opacity:1}
.modal-handle{display:none}
.modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.modal-head h3{font-size:20px}
.modal-close{
  width:34px;height:34px;border-radius:10px;border:1px solid var(--line);background:transparent;
  cursor:pointer;color:var(--ink-2);line-height:1;font-size:18px;
}
.modal-close:hover{border-color:var(--brand);color:var(--brand)}
.modal-desc{margin:12px 0 22px;font-size:15px;line-height:1.75;color:var(--ink-2)}
.field{margin-bottom:16px;display:block}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-input);outline:0;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:auto;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand);box-shadow:0 0 0 2px rgba(200,241,53,.55);
}
.field input::placeholder,.field textarea::placeholder{color:var(--muted)}
.field.has-error input{border-color:var(--accent-2)}
.field .err{font-size:14px;color:var(--accent-2);margin-top:8px}
.privacy{margin-top:14px;font-size:13px;line-height:1.7;color:var(--muted)}
.privacy a{color:var(--brand);border-bottom:1px solid var(--accent)}
.modal-success{text-align:center;padding:14px 0 4px}
.success-icon{
  width:54px;height:54px;margin:0 auto 16px;border-radius:50%;background:var(--accent);
  color:var(--brand-deep);display:flex;align-items:center;justify-content:center;font-size:22px;
}
.modal-success p{color:var(--ink-2);margin-bottom:20px}

/* 动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .btn,.post-card,.pain-card,.sol-small,.post-thumb img,.drawer,.modal,.faq-a{transition:none !important}
}

/* 响应式 */
@media (max-width:1279px){
  h1{font-size:40px}
}
@media (max-width:1023px){
  .nav-links,.search-box,.nav-quiet{display:none}
  .icon-btn{display:inline-flex}
  .section{padding:72px 0}
  .section-sm{padding:56px 0}
  .hero{padding:56px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:36px}
  .pain-grid{grid-template-columns:repeat(2,1fr)}
  .pain-card.span2{grid-column:span 2}
  .solution-top{grid-template-columns:1fr}
  .solution-bottom{grid-template-columns:repeat(2,1fr)}
  .solution-bottom .sol-small:nth-child(2){transform:none}
  .solution-bottom .sol-small:nth-child(2):hover{transform:translateY(-2px)}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .scene-grid{grid-template-columns:1fr;gap:32px}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .cta-band{grid-template-columns:1fr;padding:32px 26px}
  .foot-grid{grid-template-columns:repeat(2,1fr);gap:32px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .section{padding:56px 0}
  .section-sm{padding:44px 0}
  h1{font-size:30px}
  h2{font-size:23px}
  .hero .sub{font-size:18px}
  .hero-frame img{aspect-ratio:16/9}
  .hero-stat{display:none}
  .pain-grid{grid-template-columns:1fr}
  .pain-card.span2{grid-column:span 1}
  .solution-bottom{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr 1fr;gap:18px}
  .stat-cell .num{font-size:32px}
  .post-grid{grid-template-columns:1fr}
  .scene-item{grid-template-columns:1fr;gap:6px}
  .cta-band{padding:26px 20px}
  .foot-grid{grid-template-columns:1fr}
  .site-footer{padding:56px 0 22px;margin-top:64px}
  .modal-backdrop{padding:0;align-items:flex-end}
  .modal{width:100%;border-radius:18px 18px 0 0;max-height:92vh;padding:20px 20px 26px}
  .modal-handle{display:block;width:42px;height:4px;background:var(--line);border-radius:999px;margin:0 auto 16px}
  .hero-actions .btn{width:100%}
}

/* roulang page: article */
:root{
  --bg:#F6F7F4; --surface:#FFFFFF; --ink:#0F1A15; --ink-2:#44524B; --muted:#7C8A83;
  --line:#E3E7E1; --brand:#10352A; --brand-deep:#06201A; --accent:#C8F135; --accent-2:#FF7A3D;
  --shadow-sm:0 1px 2px rgba(15,26,21,.06);
  --shadow-md:0 8px 24px -12px rgba(15,26,21,.18);
  --shadow-lg:0 18px 40px -20px rgba(15,26,21,.28);
  --r-card:18px; --r-btn:12px; --r-img:14px; --r-input:10px;
  --maxw:1240px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-0.02em;line-height:1.25;color:var(--ink);}
p{margin:0;}
img{max-width:100%;display:block;border-radius:var(--r-img);}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input,select,textarea{font-family:inherit;font-size:15px;color:var(--ink);}
.mono{font-family:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,monospace;font-variant-numeric:tabular-nums;letter-spacing:0;}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.section{padding:96px 0;}
.section-sm{padding:72px 0;}
@media(max-width:1024px){.section{padding:72px 0;}.section-sm{padding:56px 0;}}
@media(max-width:640px){.section{padding:56px 0;}.section-sm{padding:44px 0;}.container{padding:0 20px;}}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,247,244,.86);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:24px;height:64px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:28px;height:28px;border-radius:9px;background:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;position:relative;flex-shrink:0;
}
.brand-mark::before{
  content:"";width:14px;height:8px;border:2px solid var(--brand-deep);
  border-radius:50%/60% 60% 40% 40%;border-bottom-color:transparent;
}
.brand-dot{
  position:absolute;right:5px;top:5px;width:5px;height:5px;border-radius:50%;
  background:var(--brand-deep);
}
.brand-text{font-weight:800;font-size:17px;letter-spacing:-0.01em;color:var(--ink);}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:8px;}
.nav-link{font-size:15px;font-weight:500;color:var(--ink-2);position:relative;padding:6px 0;}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:0;height:2px;width:0;background:var(--accent);
  transform:translateX(-50%);transition:width .2s ease;border-radius:2px;
}
.nav-link:hover{color:var(--brand);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--brand);font-weight:700;}
.nav-link.is-active::after{width:100%;}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto;}
.search-box{
  display:inline-flex;align-items:center;gap:8px;width:240px;height:40px;padding:0 10px 0 12px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-input);
  color:var(--muted);transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box:hover{border-color:rgba(16,53,42,.4);}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 2px rgba(200,241,53,.7);}
.search-box input{border:0;outline:0;background:transparent;flex:1;min-width:0;font-size:14px;}
.search-box input::placeholder{color:var(--muted);}
.kbd{
  font-size:11px;line-height:1;padding:4px 6px;border-radius:6px;
  background:#EEF1EC;color:var(--ink-2);border:1px solid var(--line);
}
.nav-quiet{font-size:14px;font-weight:600;color:var(--ink-2);}
.nav-quiet:hover{color:var(--brand);}
.icon-btn{
  display:none;width:40px;height:40px;border-radius:var(--r-btn);border:1px solid var(--line);
  background:var(--surface);align-items:center;justify-content:center;color:var(--ink);
}
.icon-btn:hover{border-color:var(--brand);}
@media(max-width:1180px){.nav-links{gap:18px;}.nav-link{font-size:14px;}.search-box{width:190px;}}
@media(max-width:1024px){
  .nav-links,.search-box,.nav-quiet{display:none;}
  .icon-btn{display:inline-flex;}
  .nav-inner{height:56px;}
  .brand-text{font-size:16px;}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;padding:12px 24px;border-radius:var(--r-btn);
  transition:all .2s ease;white-space:nowrap;
}
.btn i{transition:transform .2s ease;}
.btn:hover i.fa-arrow-right{transform:translateX(4px);}
.btn-primary{background:var(--brand);color:#FFFFFF;box-shadow:var(--shadow-sm);}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn-primary:active{transform:scale(.98);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--ink);}
.btn-ghost:hover{border-color:var(--brand);background:var(--surface);}
.btn-pill{border-radius:999px;}
.btn:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;
}
.link-underline{
  font-size:15px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--accent);padding-bottom:2px;
}
.link-underline:hover{border-bottom-width:2px;color:var(--brand);}

/* ---------- 标签/徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;line-height:1;
  padding:6px 12px;border-radius:999px;background:#EEF1EC;color:var(--brand);font-weight:600;
}
.badge-accent{background:var(--accent);color:var(--brand-deep);}

/* ---------- 文章 ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);padding-top:32px;}
.crumb a:hover{color:var(--brand);}
.crumb .sep{color:var(--line);}
.crumb .current{color:var(--ink);font-weight:600;max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.article-head{max-width:760px;padding:28px 0 32px;border-bottom:1px solid var(--line);margin-bottom:40px;}
.article-head h1{font-size:36px;line-height:1.25;font-weight:800;letter-spacing:-0.02em;}
.article-head .lede{margin-top:16px;font-size:17px;color:var(--ink-2);line-height:1.8;}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:22px;font-size:13px;color:var(--muted);}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:56px;align-items:start;}
.article-body{max-width:760px;font-size:17px;line-height:1.9;color:var(--ink-2);}
.article-body > * + *{margin-top:22px;}
.article-body h2{
  position:relative;font-size:26px;line-height:1.4;color:var(--ink);margin-top:48px;
  padding-left:16px;font-weight:700;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:6px;bottom:6px;width:3px;border-radius:3px;background:var(--accent);
}
.article-body h3{font-size:20px;line-height:1.5;color:var(--ink);margin-top:36px;font-weight:700;}
.article-body h4{font-size:17px;color:var(--ink);margin-top:28px;font-weight:700;}
.article-body p{font-size:17px;line-height:1.9;}
.article-body a{color:var(--brand);border-bottom:1px solid var(--accent);}
.article-body strong{color:var(--ink);font-weight:700;}
.article-body blockquote{
  margin:28px 0;padding:18px 24px;background:#F1F3EF;border-left:3px solid var(--accent);
  border-radius:0 var(--r-card) var(--r-card) 0;color:var(--ink-2);font-size:16px;
}
.article-body ul,.article-body ol{margin:20px 0;padding:0;display:grid;gap:10px;}
.article-body ul li{position:relative;padding-left:22px;font-size:16.5px;line-height:1.8;}
.article-body ul li::before{
  content:"";position:absolute;left:4px;top:.72em;width:8px;height:8px;border-radius:50%;background:var(--accent);
}
.article-body ol{counter-reset:li;}
.article-body ol li{position:relative;padding-left:34px;font-size:16.5px;line-height:1.8;counter-increment:li;}
.article-body ol li::before{
  content:counter(li,decimal-leading-zero);position:absolute;left:0;top:.2em;
  font-family:ui-monospace,"JetBrains Mono",monospace;font-size:13px;font-weight:700;color:var(--brand);
}
.article-body img{border-radius:var(--r-img);margin:28px 0;width:100%;height:auto;}
.article-body figure{margin:28px 0;}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px;}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0;}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:24px 0;}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:12px 10px;text-align:left;}
.article-body th{color:var(--ink);font-weight:700;background:#F1F3EF;}

.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-sm);position:sticky;top:88px;
}
.side-card h3{font-size:16px;margin-bottom:14px;}
.side-list{display:grid;gap:14px;}
.side-list a{font-size:14px;color:var(--ink-2);line-height:1.6;display:block;}
.side-list a:hover{color:var(--brand);}
.side-list .idx{
  font-family:ui-monospace,"JetBrains Mono",monospace;font-size:12px;color:var(--muted);
  display:inline-block;margin-right:6px;
}
@media(max-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;}
  .side-card{display:none;}
  .article-head h1{font-size:30px;}
}
@media(max-width:640px){
  .article-head h1{font-size:26px;}
  .article-body,.article-body p{font-size:16px;}
  .article-body h2{font-size:22px;margin-top:36px;}
}

.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:48px;}

.section-title{font-size:28px;line-height:1.35;font-weight:700;}
.section-sub{margin-top:12px;font-size:16px;color:var(--ink-2);max-width:640px;line-height:1.8;}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px;}

.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
@media(max-width:1024px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media(max-width:640px){.card-grid{grid-template-columns:minmax(0,1fr);}}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:rgba(200,241,53,.65);}
.card-cover{aspect-ratio:16/9;overflow:hidden;background:#EEF1EC;}
.card-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .3s ease;}
.card:hover .card-cover img{transform:scale(1.02);}
.card-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.card-body h3{font-size:18px;line-height:1.5;font-weight:700;}
.card-body p{font-size:15px;line-height:1.7;color:var(--ink-2);}
.card-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;font-size:13px;color:var(--muted);}

.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);background:var(--surface);
  padding:56px 24px;text-align:center;
}
.empty-state i{font-size:28px;color:var(--accent);}
.empty-state h3{margin-top:16px;font-size:20px;}
.empty-state p{margin-top:10px;color:var(--ink-2);font-size:15px;}

/* ---------- CTA ---------- */
.cta-band{
  background:var(--brand-deep);color:#F2F5F0;border-radius:24px;padding:56px;
  display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center;
}
.cta-band h2{color:#FFFFFF;font-size:30px;line-height:1.3;}
.cta-band p{color:#C9D3CD;margin-top:14px;font-size:16px;line-height:1.8;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}
.btn-light{background:#FFFFFF;color:var(--brand-deep);}
.btn-light:hover{background:var(--accent);color:var(--brand-deep);}
.btn-outline-light{background:transparent;border:1px solid rgba(242,245,240,.35);color:#F2F5F0;}
.btn-outline-light:hover{border-color:var(--accent);color:var(--accent);}
@media(max-width:900px){
  .cta-band{grid-template-columns:minmax(0,1fr);padding:36px 24px;gap:24px;}
  .cta-actions{justify-content:flex-start;}
  .cta-band h2{font-size:24px;}
}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 0;text-align:left;font-size:17px;font-weight:600;color:var(--ink);
}
.faq-q i{color:var(--brand);transition:transform .24s ease;flex-shrink:0;}
.faq-item.is-open .faq-q i{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease;}
.faq-a p{padding:0 0 22px;font-size:16px;line-height:1.8;color:var(--ink-2);}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--brand-deep);color:#F2F5F0;margin-top:96px;border-top:1px solid rgba(200,241,53,.35);}
.foot-top{padding:72px 0 32px;}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;}
.foot-brand .brand-text{color:#FFFFFF;}
.foot-brand p{margin-top:18px;font-size:14px;line-height:1.8;color:#AEBAB3;max-width:340px;}
.foot-title{font-size:14px;font-weight:600;color:var(--accent);letter-spacing:.02em;margin-bottom:16px;}
.foot-links{display:grid;gap:12px;}
.foot-links a{font-size:14px;color:#D3DCD6;}
.foot-links a:hover{color:var(--accent);}
.foot-contact{display:grid;gap:12px;font-size:14px;color:#D3DCD6;}
.foot-contact span{display:flex;gap:10px;align-items:flex-start;line-height:1.7;}
.foot-contact i{color:var(--accent);margin-top:5px;font-size:13px;}
.foot-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid rgba(242,245,240,.14);
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:#93A19A;
}
@media(max-width:900px){.foot-grid{grid-template-columns:1fr 1fr;gap:32px;}}
@media(max-width:640px){.foot-top{padding:56px 0 24px;}.foot-grid{grid-template-columns:1fr;}}

/* ---------- 弹层 ---------- */
.modal-mask{
  position:fixed;inset:0;z-index:100;background:rgba(6,32,26,.45);
  display:flex;align-items:center;justify-content:center;padding:24px;
  opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;
}
.modal-mask.is-open{opacity:1;visibility:visible;}
.modal{
  width:100%;max-width:480px;background:var(--surface);border-radius:var(--r-card);
  padding:32px;box-shadow:var(--shadow-lg);transform:translateY(12px);transition:transform .28s cubic-bezier(.22,.61,.36,1);
  max-height:90vh;overflow:auto;
}
.modal-mask.is-open .modal{transform:translateY(0);}
.modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;}
.modal-head h3{font-size:22px;}
.modal-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;color:var(--ink-2);}
.modal-close:hover{border-color:var(--brand);color:var(--brand);}
.modal-desc{margin-top:12px;font-size:14px;line-height:1.8;color:var(--ink-2);}
.form-grid{display:grid;gap:16px;margin-top:24px;}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;background:#FFFFFF;border:1px solid var(--line);
  border-radius:var(--r-input);outline:0;transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 2px rgba(200,241,53,.7);}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--ink-2) 50%),linear-gradient(135deg,var(--ink-2) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 14px) 21px;background-size:6px 6px,6px 6px;background-repeat:no-repeat;}
.privacy-note{margin-top:14px;font-size:13px;line-height:1.7;color:var(--muted);}
.privacy-note a{color:var(--brand);border-bottom:1px solid var(--accent);}
.form-success{display:none;text-align:center;padding:24px 0 8px;}
.form-success i{font-size:34px;color:var(--accent);}
.form-success p{margin-top:14px;font-size:15px;color:var(--ink-2);}
.modal.is-done .form-grid,.modal.is-done .modal-desc,.modal.is-done .privacy-note{display:none;}
.modal.is-done .form-success{display:block;}
@media(max-width:640px){
  .modal-mask{align-items:flex-end;padding:0;}
  .modal{max-width:100%;border-radius:18px 18px 0 0;padding:24px 20px 28px;transform:translateY(100%);}
  .modal-mask.is-open .modal{transform:translateY(0);}
}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;z-index:90;background:rgba(6,32,26,.45);
  opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;
}
.drawer-mask.is-open{opacity:1;visibility:visible;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);z-index:95;background:var(--surface);
  padding:24px;transform:translateY(20px);opacity:0;visibility:hidden;
  transition:transform .28s cubic-bezier(.22,.61,.36,1),opacity .28s ease,visibility .28s ease;
  display:flex;flex-direction:column;gap:8px;overflow:auto;border-left:1px solid var(--line);
}
.drawer.is-open{transform:translateY(0);opacity:1;visibility:visible;}
.drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 4px;font-size:16px;font-weight:600;border-bottom:1px solid var(--line);color:var(--ink);
}
.drawer a.drawer-link:hover{color:var(--brand);}
.drawer .btn{margin-top:18px;}

.search-panel{
  position:fixed;inset:0;z-index:98;background:rgba(246,247,244,.98);
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;
  padding:80px 24px 24px;
}
.search-panel.is-open{opacity:1;visibility:visible;}
.search-panel .inner{max-width:640px;margin:0 auto;}
.search-panel input{
  width:100%;height:54px;border:1px solid var(--line);border-radius:var(--r-input);
  padding:0 16px;font-size:16px;outline:0;background:#FFFFFF;
}
.search-panel input:focus{border-color:var(--brand);box-shadow:0 0 0 2px rgba(200,241,53,.7);}
.hot-words{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px;}
.hot-words a{font-size:13px;}
.search-close{position:absolute;top:24px;right:24px;}

.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1);}
.reveal.is-in{opacity:1;transform:none;}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1 !important;transform:none !important;transition:none !important;}
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important;}
}

/* roulang page: category1 */
:root{
  --bg:#F6F7F4;
  --surface:#FFFFFF;
  --ink:#0F1A15;
  --ink-2:#44524B;
  --muted:#7C8A83;
  --line:#E3E7E1;
  --brand:#10352A;
  --brand-deep:#06201A;
  --accent:#C8F135;
  --accent-2:#FF7A3D;
  --chip:#EEF1EC;
  --shadow-sm:0 1px 2px rgba(15,26,21,.06);
  --shadow-md:0 8px 24px -12px rgba(15,26,21,.18);
  --shadow-lg:0 18px 40px -20px rgba(15,26,21,.28);
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
.site-body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
.site-body a{color:inherit;text-decoration:none}
.site-body img{display:block;max-width:100%}
.site-body button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
.site-body input,.site-body select,.site-body textarea{font:inherit;color:inherit}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
p{margin:0}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,247,244,.86);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em;color:var(--brand);flex:none}
.brand-mark{
  position:relative;width:28px;height:28px;border-radius:9px;background:var(--accent);
  display:grid;place-items:center;flex:none;
}
.brand-mark::before{
  content:"";position:absolute;width:16px;height:9px;border:2px solid var(--brand);
  border-radius:50% 50% 50% 50%/60% 60% 60% 60%;border-top-color:transparent;
}
.brand-dot{width:5px;height:5px;border-radius:50%;background:var(--brand);position:relative;z-index:1}
.brand-text{white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:6px}
.nav-link{position:relative;padding:6px 0;font-size:15px;font-weight:500;color:var(--ink-2);transition:color .2s ease}
.nav-link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:-2px;height:2px;
  background:var(--accent);border-radius:2px;transition:left .2s ease,right .2s ease;
}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after{left:0;right:0}
.nav-link.is-active{color:var(--brand);font-weight:600}
.nav-link.is-active::after{left:0;right:0}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.search-box{
  display:flex;align-items:center;gap:8px;width:240px;height:40px;padding:0 12px;
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  transition:border-color .2s ease,box-shadow .2s ease;color:var(--muted);
}
.search-box:hover{border-color:rgba(16,53,42,.4)}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 2px rgba(200,241,53,.55)}
.search-box input{flex:1;min-width:0;border:0;outline:0;background:transparent;font-size:14px;color:var(--ink)}
.search-box input::placeholder{color:var(--muted)}
.kbd{font-size:11px;padding:2px 5px;border:1px solid var(--line);border-radius:5px;color:var(--muted);background:var(--chip)}
.nav-quiet{font-size:15px;color:var(--ink-2);transition:color .2s ease}
.nav-quiet:hover{color:var(--brand)}
.icon-btn{
  display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
  background:var(--surface);color:var(--brand);place-items:center;font-size:15px;
}
.icon-btn:hover{border-color:rgba(16,53,42,.4)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);font-size:15px;font-weight:600;padding:12px 24px;
  transition:background-color .2s ease,transform .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease;
  border:1px solid transparent;white-space:nowrap;
}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);background:var(--surface)}
.btn-accent{background:var(--accent);color:var(--brand-deep)}
.btn-accent:hover{background:#d8ff52;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:999px}
.btn-lg{padding:15px 30px;font-size:16px}
.btn-block{width:100%}
.btn .fa-arrow-right{transition:transform .2s ease}
.btn:hover .fa-arrow-right{transform:translateX(4px)}
.link-underline{color:var(--ink);border-bottom:1px solid var(--accent);padding-bottom:2px;transition:border-bottom-width .2s ease}
.link-underline:hover{border-bottom-width:2px}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--brand)}
.btn-text i{transition:transform .2s ease}
.btn-text:hover i{transform:translateX(4px)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--brand-deep);color:#F2F5F0}
.hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(6,32,26,.92) 0%,rgba(6,32,26,.74) 46%,rgba(6,32,26,.46) 100%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1.12fr .88fr;gap:56px;align-items:center;padding:76px 0 84px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(242,245,240,.7);margin-bottom:22px}
.crumb a{transition:color .2s ease}
.crumb a:hover{color:var(--accent)}
.crumb .sep{opacity:.5}
.crumb .current{color:#F2F5F0;font-weight:600}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  letter-spacing:.04em;color:var(--accent);margin-bottom:16px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--accent);border-radius:2px}
.hero-title{font-size:46px;line-height:1.18;font-weight:800;letter-spacing:-.02em;color:#F6F8F3}
.hero-sub{margin-top:18px;font-size:20px;line-height:1.6;color:rgba(242,245,240,.86);max-width:600px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero .btn-ghost{border-color:rgba(242,245,240,.32);color:#F2F5F0;background:rgba(255,255,255,.06)}
.hero .btn-ghost:hover{border-color:var(--accent);background:rgba(255,255,255,.12)}
.trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.trust-row span{
  font-size:13px;padding:6px 12px;border-radius:999px;
  background:rgba(200,241,53,.14);border:1px solid rgba(200,241,53,.3);color:#EAFBC0;
}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);border:1px solid rgba(200,241,53,.24)}
.hero-badge{
  position:absolute;left:-16px;bottom:-18px;background:var(--surface);color:var(--ink);
  border-radius:14px;padding:14px 18px;box-shadow:var(--shadow-lg);border:1px solid var(--line);
  display:flex;align-items:center;gap:12px;max-width:260px;
}
.hero-badge i{color:var(--brand);background:var(--accent);width:34px;height:34px;border-radius:10px;display:grid;place-items:center;font-size:14px;flex:none}
.hero-badge b{display:block;font-size:15px;font-weight:700;font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.hero-badge small{display:block;font-size:12px;color:var(--muted)}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-white{background:var(--surface)}
.section-head{max-width:760px;margin-bottom:44px}
.section-title{font-size:28px;line-height:1.35;font-weight:700}
.section-title .accent-bar{
  display:inline-block;width:4px;height:22px;background:var(--accent);border-radius:3px;
  margin-right:12px;transform:translateY(2px);
}
.section-sub{margin-top:14px;font-size:16px;color:var(--ink-2);line-height:1.8}
.head-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px;flex-wrap:wrap}

/* ---------- overview split ---------- */
.split{display:grid;grid-template-columns:1.35fr .95fr;gap:48px;align-items:start}
.prose p{font-size:17px;line-height:1.85;color:var(--ink-2);max-width:760px}
.prose p + p{margin-top:16px}
.spec-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--shadow-sm);
}
.spec-card h3{font-size:20px;margin-bottom:18px}
.spec-list{margin:0;padding:0;list-style:none}
.spec-list li{
  display:flex;justify-content:space-between;gap:16px;padding:13px 0;
  border-bottom:1px solid var(--line);font-size:15px;
}
.spec-list li:last-child{border-bottom:0}
.spec-list .k{color:var(--muted);font-size:13px;letter-spacing:.02em}
.spec-list .v{color:var(--ink);font-weight:600;text-align:right}

/* ---------- timeline ---------- */
.timeline{position:relative;max-width:920px}
.tl-item{position:relative;display:grid;grid-template-columns:72px 1fr;gap:26px;padding-bottom:38px}
.tl-item:last-child{padding-bottom:0}
.tl-item:not(:last-child)::after{
  content:"";position:absolute;left:35px;top:62px;bottom:6px;width:1px;background:var(--line);
}
.tl-num{
  width:56px;height:56px;border-radius:16px;background:var(--brand);color:var(--accent);
  display:grid;place-items:center;font-size:17px;font-weight:700;
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  border-left:3px solid var(--accent);
}
.tl-item:hover .tl-num{background:var(--brand-deep)}
.tl-body{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:24px 26px;box-shadow:var(--shadow-sm);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}
.tl-item:hover .tl-body{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:rgba(200,241,53,.7)}
.tl-body h3{font-size:20px;margin-bottom:8px}
.tl-body p{font-size:15px;line-height:1.8;color:var(--ink-2)}
.tl-tag{display:inline-block;margin-top:14px;font-size:13px;padding:5px 12px;border-radius:999px;background:var(--chip);color:var(--brand)}

/* ---------- dark stats band ---------- */
.band-dark{background:var(--brand-deep);color:#F2F5F0;padding:72px 0}
.band-dark .section-title{color:#F6F8F3}
.band-dark .section-sub{color:rgba(242,245,240,.72)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(200,241,53,.18);border-radius:var(--r-card);overflow:hidden;border:1px solid rgba(200,241,53,.18)}
.stat{background:var(--brand-deep);padding:30px 26px}
.stat .num{font-size:34px;font-weight:800;color:var(--accent);line-height:1.2;font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.stat .num small{font-size:15px;font-weight:600;margin-left:4px;color:var(--accent)}
.stat .lab{margin-top:8px;font-size:14px;color:rgba(242,245,240,.74);line-height:1.7}

/* ---------- delivery definition list ---------- */
.dl-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 48px}
.dl-row{display:grid;grid-template-columns:170px 1fr;gap:20px;padding:20px 0;border-bottom:1px solid var(--line)}
.dl-row dt{font-size:13px;letter-spacing:.02em;color:var(--muted);padding-top:4px}
.dl-row dd{margin:0;font-size:16px;line-height:1.8;color:var(--ink-2)}

/* ---------- scene cards ---------- */
.scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.scene-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;box-shadow:var(--shadow-sm);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  display:flex;gap:20px;
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:rgba(200,241,53,.7)}
.scene-card img{width:96px;height:96px;object-fit:cover;border-radius:var(--r-img);flex:none}
.scene-card h3{font-size:18px;margin-bottom:6px}
.scene-card p{font-size:15px;line-height:1.75;color:var(--ink-2)}
.scene-card.wide{grid-column:span 2;align-items:center}
.scene-card.wide img{width:220px;height:130px}

/* ---------- faq ---------- */
.faq{max-width:860px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0;text-align:left;font-size:17px;font-weight:600;color:var(--ink);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand)}
.faq-q:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.faq-icon{position:relative;width:16px;height:16px;flex:none}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--brand);border-radius:2px;transition:transform .24s ease,opacity .24s ease}
.faq-icon::before{left:0;right:0;top:7px;height:2px}
.faq-icon::after{top:0;bottom:0;left:7px;width:2px}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s ease}
.faq-a p{font-size:16px;line-height:1.8;color:var(--ink-2);padding:0 40px 22px 0}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:44px 48px;display:flex;align-items:center;justify-content:space-between;gap:36px;
  box-shadow:var(--shadow-md);flex-wrap:wrap;
}
.cta-band h2{font-size:26px;line-height:1.35}
.cta-band p{margin-top:10px;font-size:16px;color:var(--ink-2);max-width:620px;line-height:1.8}
.cta-actions{display:flex;flex-direction:column;gap:10px;align-items:flex-start}
.cta-actions small{font-size:13px;color:var(--muted)}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-deep);color:#F2F5F0;border-top:1px solid rgba(200,241,53,.28);padding:72px 0 28px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.site-footer .brand{color:#F2F5F0}
.site-footer .brand-text{color:#F2F5F0}
.foot-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(242,245,240,.68);max-width:360px}
.foot-title{font-size:14px;font-weight:600;color:var(--accent);margin-bottom:16px}
.foot-links{display:flex;flex-direction:column;gap:10px}
.foot-links a{font-size:14px;color:rgba(242,245,240,.78);transition:color .2s ease}
.foot-links a:hover{color:var(--accent)}
.foot-contact{display:flex;flex-direction:column;gap:12px}
.foot-contact span{font-size:14px;color:rgba(242,245,240,.78);display:flex;gap:10px;line-height:1.7}
.foot-contact i{color:var(--accent);margin-top:4px}
.foot-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(242,245,240,.14);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(242,245,240,.55);
}

/* ---------- modal ---------- */
.modal{position:fixed;inset:0;z-index:90;display:none}
.modal.is-open{display:block}
.modal-mask{position:absolute;inset:0;background:rgba(6,32,26,.45);opacity:0;transition:opacity .28s ease}
.modal.is-open .modal-mask{opacity:1}
.modal-panel{
  position:absolute;top:0;right:0;height:100%;width:480px;max-width:100%;
  background:var(--surface);box-shadow:var(--shadow-lg);padding:32px;overflow-y:auto;
  transform:translateY(16px);opacity:0;transition:transform .28s ease,opacity .28s ease;
}
.modal.is-open .modal-panel{transform:none;opacity:1}
.modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}
.modal-eyebrow{font-size:12px;letter-spacing:.08em;color:var(--muted);margin-bottom:8px}
.modal-head h2{font-size:22px;line-height:1.4}
.modal-close{
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line);
  display:grid;place-items:center;font-size:18px;color:var(--ink-2);flex:none;transition:border-color .2s ease,color .2s ease;
}
.modal-close:hover{border-color:var(--brand);color:var(--brand)}
.modal-lead{margin-top:14px;font-size:15px;line-height:1.8;color:var(--ink-2)}
.form-grid{display:grid;gap:16px;margin-top:24px}
.field{display:grid;gap:8px}
.field label{font-size:14px;font-weight:600}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;background:var(--surface);
  border:1px solid var(--line);border-radius:10px;font-size:15px;outline:0;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:110px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 2px rgba(200,241,53,.55)}
.form-note{display:flex;gap:10px;align-items:flex-start;font-size:13px;line-height:1.7;color:var(--muted);margin-top:14px}
.form-note input{width:16px;height:16px;margin-top:3px;accent-color:var(--brand)}
.modal-success{display:none;text-align:center;padding:40px 0}
.modal-success.is-visible{display:block}
.modal-success i{width:56px;height:56px;border-radius:50%;background:var(--accent);color:var(--brand-deep);display:grid;place-items:center;font-size:22px;margin:0 auto 18px}
.modal-success h3{font-size:20px;margin-bottom:10px}
.modal-success p{font-size:15px;color:var(--ink-2);line-height:1.8}

/* ---------- drawer & search panel ---------- */
.drawer{position:fixed;inset:0;z-index:95;display:none}
.drawer.is-open{display:block}
.drawer-mask{position:absolute;inset:0;background:rgba(6,32,26,.45)}
.drawer-panel{
  position:absolute;top:0;right:0;width:320px;max-width:86%;height:100%;
  background:var(--surface);padding:24px;display:flex;flex-direction:column;gap:22px;
  transform:translateY(18px);opacity:0;transition:transform .28s ease,opacity .28s ease;
}
.drawer.is-open .drawer-panel{transform:none;opacity:1}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{padding:12px 2px;font-size:16px;font-weight:500;color:var(--ink-2);border-bottom:1px solid var(--line)}
.drawer-nav a.is-active{color:var(--brand);font-weight:700}
.drawer-note{font-size:13px;color:var(--muted);line-height:1.7}
.search-panel{position:fixed;inset:0;z-index:96;display:none;background:rgba(6,32,26,.5)}
.search-panel.is-open{display:block}
.search-panel-inner{
  background:var(--surface);padding:22px 24px;display:flex;flex-direction:column;gap:16px;
  transform:translateY(-14px);opacity:0;transition:transform .28s ease,opacity .28s ease;
}
.search-panel.is-open .search-panel-inner{transform:none;opacity:1}
.search-panel-row{display:flex;gap:12px;align-items:center}
.search-panel-row input{
  flex:1;height:48px;padding:0 16px;border:1px solid var(--line);border-radius:10px;outline:0;font-size:16px;
}
.search-panel-row input:focus{border-color:var(--brand);box-shadow:0 0 0 2px rgba(200,241,53,.55)}
.hot-terms{display:flex;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--muted);align-items:center}
.hot-terms a{font-size:13px;padding:5px 12px;border-radius:999px;background:var(--chip);color:var(--brand);transition:background .2s ease}
.hot-terms a:hover{background:var(--accent)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1)}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .nav-links{gap:20px}
  .search-box{width:200px}
}
@media (max-width:1024px){
  .nav-links,.search-box,.nav-quiet{display:none}
  .icon-btn{display:grid}
  .hero-inner{grid-template-columns:1fr;gap:40px;padding:60px 0 68px}
  .hero-title{font-size:38px}
  .split{grid-template-columns:1fr;gap:32px}
  .stat-grid{grid-template-columns:1fr 1fr}
  .dl-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:72px 0}
  .section-tight{padding:56px 0}
}
@media (max-width:768px){
  .site-body{font-size:16px}
  .container{padding:0 20px}
  .nav-inner{height:56px}
  .brand{font-size:16px}
  .brand-text{font-size:16px}
  .hero-title{font-size:30px}
  .hero-sub{font-size:17px}
  .section{padding:56px 0}
  .section-tight{padding:44px 0}
  .section-title{font-size:23px}
  .scene-grid{grid-template-columns:1fr}
  .scene-card.wide{grid-column:span 1;flex-direction:column;align-items:flex-start}
  .scene-card.wide img{width:100%;height:170px}
  .scene-card{flex-direction:column}
  .scene-card img{width:100%;height:160px}
  .tl-item{grid-template-columns:48px 1fr;gap:16px;padding-bottom:28px}
  .tl-item:not(:last-child)::after{left:23px;top:54px}
  .tl-num{width:44px;height:44px;font-size:15px;border-radius:13px}
  .tl-body{padding:20px}
  .dl-row{grid-template-columns:1fr;gap:6px}
  .cta-band{padding:30px 24px;flex-direction:column;align-items:flex-start}
  .cta-band h2{font-size:22px}
  .foot-grid{grid-template-columns:1fr;gap:28px}
  .foot-bottom{flex-direction:column;gap:8px}
  .hero-badge{position:static;left:auto;bottom:auto;margin-top:14px;max-width:none}
  .modal-panel{top:auto;bottom:0;height:auto;max-height:92%;width:100%;border-radius:18px 18px 0 0}
  .drawer-panel{width:100%;max-width:100%;border-radius:18px 18px 0 0;top:auto;bottom:0;height:auto;max-height:88%}
}
@media (max-width:520px){
  .stat-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *,*::before,*::after{animation:none!important;transition:none!important}
}

/* roulang page: category3 */
:root{
  --bg:#F6F7F4;
  --surface:#FFFFFF;
  --ink:#0F1A15;
  --ink-2:#44524B;
  --muted:#7C8A83;
  --line:#E3E7E1;
  --brand:#10352A;
  --brand-deep:#06201A;
  --accent:#C8F135;
  --accent-2:#FF7A3D;
  --radius-card:18px;
  --radius-btn:12px;
  --radius-img:14px;
  --shadow-sm:0 1px 2px rgba(15,26,21,.06);
  --shadow-md:0 8px 24px -12px rgba(15,26,21,.18);
  --shadow-lg:0 18px 40px -20px rgba(15,26,21,.28);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(246,247,244,.86);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:64px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:28px;height:28px;border-radius:9px;
  background:var(--accent);
  display:inline-flex;align-items:center;justify-content:center;
  position:relative;flex:0 0 auto;
}
.brand-mark::before{
  content:"";position:absolute;inset:6px;border-radius:50%;
  border:2px solid transparent;
  border-top-color:var(--brand);
  border-right-color:var(--brand);
  transform:rotate(38deg);
}
.brand-dot{
  width:6px;height:6px;border-radius:50%;background:var(--brand);
  position:relative;z-index:1;
}
.brand-text{
  font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--ink);
  white-space:nowrap;
}
.nav-links{
  display:flex;align-items:center;gap:28px;
  margin-left:8px;
  flex:1 1 auto;
}
.nav-links .nav-link{
  position:relative;
  font-size:15px;font-weight:500;color:var(--ink-2);
  padding:6px 0;
  transition:color .2s ease;
}
.nav-links .nav-link::after{
  content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;
  background:var(--accent);border-radius:2px;
  transition:left .2s ease,right .2s ease;
}
.nav-links .nav-link:hover{color:var(--brand);}
.nav-links .nav-link:hover::after{left:0;right:0;}
.nav-links .nav-link.is-active{color:var(--brand);font-weight:700;}
.nav-links .nav-link.is-active::after{left:0;right:0;}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto;flex:0 0 auto;}
.search-box{
  display:flex;align-items:center;gap:8px;
  width:240px;height:40px;padding:0 12px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:10px;
  color:var(--muted);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-box:focus-within{
  border-color:rgba(16,53,42,.4);
  box-shadow:0 0 0 3px rgba(200,241,53,.35);
}
.search-box input{
  flex:1 1 auto;min-width:0;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink);
}
.search-box input::placeholder{color:var(--muted);}
.kbd{
  font-size:11px;color:var(--muted);
  border:1px solid var(--line);border-radius:6px;
  padding:1px 5px;background:#F1F3EF;flex:0 0 auto;
}
.nav-quiet{
  font-size:14px;font-weight:600;color:var(--ink-2);
  border-bottom:1px solid transparent;
  transition:color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.nav-quiet:hover{color:var(--brand);border-bottom-color:var(--brand);}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;font-weight:600;
  padding:12px 24px;
  cursor:pointer;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .16s ease,box-shadow .2s ease;
  white-space:nowrap;
}
.btn.btn-sm{padding:9px 18px;font-size:14px;height:40px;}
.btn.btn-primary{background:var(--brand);color:#fff;border-radius:999px;}
.btn.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn.btn-primary:active{transform:scale(.98);}
.btn.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line);}
.btn.btn-ghost:hover{border-color:var(--brand);background:var(--surface);transform:translateY(-1px);}
.btn.btn-lime{background:var(--accent);color:var(--brand-deep);border-radius:999px;}
.btn.btn-lime:hover{background:#d8ff4a;transform:translateY(-1px);box-shadow:var(--shadow-md);}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}
.btn .arrow{transition:transform .2s ease;}
.btn:hover .arrow{transform:translateX(4px);}
.icon-btn{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);
  color:var(--ink);cursor:pointer;
  transition:border-color .2s ease,color .2s ease;
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);}
.icon-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px;}

/* ---------- common sections ---------- */
.section{padding-top:96px;padding-bottom:96px;}
.section.compact{padding-top:72px;padding-bottom:72px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--brand);
  background:#EEF1EC;
  border-radius:999px;
  padding:6px 14px;
  margin-bottom:18px;
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);}
.h2{font-size:28px;line-height:1.35;font-weight:700;letter-spacing:-.01em;}
.section-head{max-width:760px;}
.section-head p{color:var(--ink-2);margin-top:12px;font-size:16px;line-height:1.8;}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;letter-spacing:.02em;
  padding:5px 12px;border-radius:999px;
  background:#EEF1EC;color:var(--brand);
}
.badge.lime{background:var(--accent);color:var(--brand-deep);}
.badge.outline{background:transparent;border:1px solid var(--line);color:var(--ink-2);}

/* ---------- hero ---------- */
.cat-hero{padding-top:40px;padding-bottom:72px;}
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);margin-bottom:26px;
}
.breadcrumb a{color:var(--muted);transition:color .2s ease;}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .current{color:var(--ink);font-weight:600;}
.cat-hero-grid{
  display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center;
}
.cat-hero h1{
  font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-.02em;
}
.cat-hero .lead{
  margin-top:18px;font-size:19px;line-height:1.75;color:var(--ink-2);max-width:560px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-trust{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}
.hero-media{
  position:relative;border-radius:var(--radius-card);overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--shadow-md);
  aspect-ratio:21/9;
  background:var(--brand-deep);
}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(6,32,26,.15),rgba(6,32,26,.6));
}
.hero-media .media-tag{
  position:absolute;left:20px;bottom:20px;z-index:2;
  color:#F2F5F0;font-size:14px;font-weight:600;
}
.hero-media .media-tag span{display:block;font-size:13px;font-weight:400;color:rgba(242,245,240,.75);margin-top:4px;}

/* ---------- irregular big cards ---------- */
.big-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:48px;
}
.big-card{
  display:flex;flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);
  overflow:hidden;
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.big-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:rgba(200,241,53,.55);}
.big-card .thumb{position:relative;overflow:hidden;background:#E9ECE6;}
.big-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;}
.big-card:hover .thumb img{transform:scale(1.02);}
.big-card.r43 .thumb{aspect-ratio:4/3;}
.big-card.r169 .thumb{aspect-ratio:16/9;}
.big-card .thumb .tag-on-img{
  position:absolute;left:14px;top:14px;
  background:rgba(6,32,26,.72);color:#F2F5F0;
  font-size:12px;font-weight:600;letter-spacing:.02em;
  padding:5px 11px;border-radius:999px;
}
.big-card .body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1 1 auto;}
.big-card h3{font-size:20px;line-height:1.5;font-weight:700;}
.big-card p{font-size:15px;line-height:1.7;color:var(--ink-2);}
.spec-row{
  display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);
}
.spec-row .badge{font-weight:500;}

/* ---------- dark stat band ---------- */
.stat-band{
  background:var(--brand-deep);
  color:#F2F5F0;
  padding-top:72px;padding-bottom:72px;
}
.stat-band .h2{color:#F2F5F0;}
.stat-band .section-head p{color:rgba(242,245,240,.72);}
.stat-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:28px;margin-top:44px;
}
.stat-item{
  border-left:3px solid var(--accent);
  padding-left:18px;
}
.stat-item .num{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:38px;font-weight:700;color:var(--accent);line-height:1.1;letter-spacing:-.02em;
}
.stat-item .num small{font-size:18px;margin-left:2px;}
.stat-item .label{margin-top:10px;font-size:14px;color:rgba(242,245,240,.78);line-height:1.7;}

/* ---------- two column media rows ---------- */
.rows{display:flex;flex-direction:column;gap:56px;margin-top:48px;}
.media-row{display:grid;grid-template-columns:6fr 6fr;gap:48px;align-items:center;}
.media-row .copy h3{font-size:22px;font-weight:700;line-height:1.5;}
.media-row .copy p{margin-top:12px;color:var(--ink-2);font-size:16px;line-height:1.8;max-width:520px;}
.media-row .frame{
  border-radius:var(--radius-card);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow-sm);aspect-ratio:16/10;background:#E9ECE6;
}
.media-row .frame img{width:100%;height:100%;object-fit:cover;}
.check-list{margin-top:18px;display:flex;flex-direction:column;gap:10px;}
.check-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--ink-2);line-height:1.7;}
.check-list i{color:var(--brand);margin-top:5px;font-size:13px;}

/* ---------- definition list ---------- */
.def-list{
  margin-top:40px;border-top:1px solid var(--line);
}
.def-item{
  display:grid;grid-template-columns:200px 1fr;gap:24px;
  padding:22px 0;border-bottom:1px solid var(--line);
}
.def-item dt{font-size:13px;font-weight:600;color:var(--muted);letter-spacing:.02em;line-height:1.9;}
.def-item dd{margin:0;font-size:16px;line-height:1.8;color:var(--ink-2);}
.def-item dd strong{color:var(--ink);font-weight:700;}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:44px auto 0;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  background:transparent;border:0;cursor:pointer;text-align:left;
  padding:20px 0;font-size:17px;font-weight:600;color:var(--ink);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--brand);}
.faq-q:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px;}
.faq-q .sign{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line);background:var(--surface);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;color:var(--brand);
  transition:transform .24s ease,background-color .24s ease,border-color .24s ease;
}
.faq-item.open .faq-q .sign{transform:rotate(135deg);background:var(--accent);border-color:var(--accent);}
.faq-a{
  display:grid;grid-template-rows:0fr;
  transition:grid-template-rows .24s ease;
}
.faq-item.open .faq-a{grid-template-rows:1fr;}
.faq-a > div{overflow:hidden;}
.faq-a p{
  font-size:16px;line-height:1.8;color:var(--ink-2);
  padding-bottom:22px;max-width:760px;
}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:24px;
  padding:40px;
  display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
  box-shadow:var(--shadow-sm);
}
.cta-band h3{font-size:24px;font-weight:700;line-height:1.4;letter-spacing:-.01em;}
.cta-band p{margin-top:10px;color:var(--ink-2);font-size:15px;line-height:1.75;max-width:620px;}
.cta-actions{display:flex;flex-direction:column;gap:12px;align-items:flex-start;}
.cta-note{font-size:13px;color:var(--muted);line-height:1.7;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--brand-deep);
  color:#F2F5F0;
  margin-top:96px;
  padding-top:64px;
  border-top:1px solid rgba(200,241,53,.45);
}
.foot-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:40px;
  padding-bottom:48px;
}
.foot-brand .brand{margin-bottom:16px;}
.foot-brand .brand-text{color:#F2F5F0;}
.foot-brand p{font-size:14px;line-height:1.85;color:rgba(242,245,240,.72);max-width:340px;}
.foot-title{
  font-size:14px;font-weight:600;color:var(--accent);margin-bottom:16px;letter-spacing:.02em;
}
.foot-links{display:flex;flex-direction:column;gap:11px;}
.foot-links a{font-size:14px;color:rgba(242,245,240,.78);transition:color .2s ease;}
.foot-links a:hover{color:var(--accent);}
.foot-contact{display:flex;flex-direction:column;gap:12px;}
.foot-contact span{
  display:flex;gap:10px;align-items:flex-start;
  font-size:14px;line-height:1.7;color:rgba(242,245,240,.78);
}
.foot-contact i{color:var(--accent);margin-top:5px;font-size:13px;}
.foot-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid rgba(242,245,240,.14);
  padding-top:22px;padding-bottom:30px;
  font-size:13px;color:rgba(242,245,240,.55);
}

/* ---------- modal ---------- */
.modal-mask{
  position:fixed;inset:0;z-index:90;
  background:rgba(6,32,26,.45);
  display:none;
  align-items:center;justify-content:center;
  padding:24px;
}
.modal-mask.is-open{display:flex;}
.modal-panel{
  width:100%;max-width:480px;
  background:var(--surface);
  border-radius:var(--radius-card);
  box-shadow:var(--shadow-lg);
  padding:28px;
  transform:translateY(12px);
  opacity:0;
  transition:transform .28s cubic-bezier(.22,.61,.36,1),opacity .28s ease;
  max-height:92vh;overflow-y:auto;
}
.modal-mask.is-open .modal-panel{transform:translateY(0);opacity:1;}
.modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;}
.modal-head h3{font-size:20px;font-weight:700;line-height:1.5;}
.modal-head p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--ink-2);}
.modal-close{
  flex:0 0 auto;width:34px;height:34px;border-radius:10px;
  border:1px solid var(--line);background:var(--surface);
  cursor:pointer;color:var(--ink-2);
  display:inline-flex;align-items:center;justify-content:center;
  transition:border-color .2s ease,color .2s ease;
}
.modal-close:hover{border-color:var(--brand);color:var(--brand);}
.form-grid{display:flex;flex-direction:column;gap:16px;margin-top:22px;}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;
  background:var(--surface);
  border:1px solid var(--line);border-radius:10px;
  outline:none;font-size:15px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.7;}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--brand);box-shadow:0 0 0 3px rgba(200,241,53,.45);
}
.privacy-note{
  margin-top:14px;font-size:12.5px;line-height:1.7;color:var(--muted);
}
.privacy-note a{color:var(--brand);border-bottom:1px solid var(--accent);}
.form-success{
  display:none;text-align:center;padding:24px 0 8px;
}
.form-success.show{display:block;}
.form-success i{font-size:34px;color:var(--brand);}
.form-success p{margin-top:14px;font-size:15px;color:var(--ink-2);}

.search-panel{
  position:fixed;inset:0;z-index:95;background:var(--bg);
  display:none;padding:20px;
}
.search-panel.is-open{display:block;}
.search-panel .inner{max-width:640px;margin:56px auto 0;}
.search-panel input{
  width:100%;height:52px;border:1px solid var(--line);border-radius:12px;
  padding:0 16px;font-size:16px;outline:none;background:var(--surface);
}
.search-panel input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(200,241,53,.4);}
.hot-words{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.search-panel .close-line{display:flex;justify-content:flex-end;margin-bottom:18px;}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.in{opacity:1;transform:translateY(0);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1);}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .nav-links{gap:20px;}
  .search-box{width:190px;}
}
@media (max-width:1024px){
  .nav-links{display:none;}
  .search-box{display:none;}
  .icon-btn{display:inline-flex;}
  .nav-quiet{display:none;}
  .section{padding-top:72px;padding-bottom:72px;}
  .section.compact{padding-top:56px;padding-bottom:56px;}
  .cat-hero-grid{grid-template-columns:1fr;gap:32px;}
  .cat-hero h1{font-size:36px;}
  .big-grid{grid-template-columns:1fr;}
  .stat-grid{grid-template-columns:repeat(2,1fr);gap:24px;}
  .media-row{grid-template-columns:1fr;gap:28px;}
  .media-row.reverse .frame{order:-1;}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .cta-band{grid-template-columns:1fr;}
  .def-item{grid-template-columns:1fr;gap:8px;}
}
@media (max-width:768px){
  .container{padding-left:20px;padding-right:20px;}
  .cat-hero h1{font-size:30px;}
  .cat-hero .lead{font-size:17px;}
  .h2{font-size:23px;}
  .stat-item .num{font-size:30px;}
  .stat-grid{grid-template-columns:1fr;}
  .cta-band{padding:28px 22px;}
  .big-card .body{padding:20px;}
  .foot-grid{grid-template-columns:1fr;}
  .site-footer{margin-top:64px;padding-top:48px;}
  .modal-mask{padding:0;align-items:flex-end;}
  .modal-panel{max-width:100%;border-radius:18px 18px 0 0;padding:22px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --bg:#F6F7F4;--surface:#FFFFFF;--ink:#0F1A15;--ink-2:#44524B;--muted:#7C8A83;--line:#E3E7E1;
  --brand:#10352A;--brand-deep:#06201A;--accent:#C8F135;--accent-2:#FF7A3D;
  --chip:#EEF1EC;
  --shadow-sm:0 1px 2px rgba(15,26,21,.06);
  --shadow-md:0 8px 24px -12px rgba(15,26,21,.18);
  --shadow-lg:0 18px 40px -20px rgba(15,26,21,.28);
  --r-card:18px;--r-btn:12px;--r-img:14px;
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-sans);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
::selection{background:var(--accent);color:var(--brand-deep)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
@media(max-width:768px){.container{padding:0 20px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:70;background:rgba(246,247,4,.86);background:rgba(246,247,244,.86);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:24px;height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;min-width:0}
.brand-mark{width:28px;height:28px;border-radius:9px;background:var(--accent);display:inline-flex;align-items:center;justify-content:center;position:relative;flex:0 0 auto}
.brand-dot{width:12px;height:12px;border-radius:50%;border:2px solid var(--brand-deep);border-right-color:transparent;display:block}
.brand-text{font-weight:800;font-size:17px;letter-spacing:-.01em;color:var(--brand);white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:6px}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--ink-2);padding:6px 0;transition:color .2s ease}
.nav-link::after{content:"";position:absolute;left:50%;right:50%;bottom:0;height:2px;border-radius:2px;background:var(--accent);transition:left .2s ease,right .2s ease}
.nav-link:hover{color:var(--brand)}
.nav-link:hover::after,.nav-link.is-active::after{left:0;right:0}
.nav-link.is-active{color:var(--brand);font-weight:700}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.search-box{display:flex;align-items:center;gap:8px;width:240px;height:40px;padding:0 12px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-btn);transition:border-color .2s ease,box-shadow .2s ease}
.search-box:hover{border-color:rgba(16,53,42,.4)}
.search-box i{color:var(--muted);font-size:13px}
.search-box input{border:0;background:transparent;width:100%;min-width:0;font-size:14px;outline:none}
.search-box input::placeholder{color:var(--muted)}
.kbd{font-size:11px;color:var(--muted);background:var(--chip);border-radius:6px;padding:2px 6px;white-space:nowrap}
.nav-quiet{font-size:15px;font-weight:500;color:var(--ink-2);transition:color .2s ease}
.nav-quiet:hover{color:var(--brand)}
.icon-btn{display:none;width:40px;height:40px;align-items:center;justify-content:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-btn);cursor:pointer;transition:border-color .2s ease,background .2s ease}
.icon-btn:hover{border-color:var(--brand)}
@media(max-width:1199px){.search-box{display:none}#searchToggle{display:inline-flex}}
@media(max-width:1023px){.nav-links{display:none}.nav-quiet{display:none}#menuBtn{display:inline-flex}.nav-inner{height:56px}.brand-text{font-size:16px}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:600;border-radius:var(--r-btn);padding:12px 24px;border:1px solid transparent;cursor:pointer;transition:background .2s ease,transform .18s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease;text-align:center}
.btn:active{transform:scale(.98)}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:10px}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);background:var(--surface)}
.btn-accent{background:var(--accent);color:var(--brand-deep)}
.btn-accent:hover{background:#d7ff4d;transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-pill{border-radius:999px}
.btn-text{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--accent);padding-bottom:2px;transition:border-bottom-width .15s ease}
.btn-text:hover{border-bottom-width:2px}
.btn-text i{transition:transform .2s ease}
.btn-text:hover i{transform:translateX(4px)}

/* ---------- generic ---------- */
.section{padding:96px 0}
.section.tight{padding:72px 0}
@media(max-width:1023px){.section{padding:72px 0}.section.tight{padding:56px 0}}
@media(max-width:639px){.section{padding:56px 0}.section.tight{padding:44px 0}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--brand);background:var(--chip);border-radius:999px;padding:6px 14px;margin-bottom:18px}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}
h1,h2,h3{margin:0;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
h2{font-size:28px;line-height:1.35}
h3{font-size:20px;line-height:1.5;font-weight:700;letter-spacing:-.01em}
p{margin:0}
.lead{font-size:17px;line-height:1.8;color:var(--ink-2);max-width:760px}
.sec-head{max-width:760px;margin-bottom:48px}
.sec-head p{margin-top:14px;font-size:16px;line-height:1.8;color:var(--ink-2)}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;letter-spacing:.02em;background:var(--chip);color:var(--brand);border-radius:999px;padding:5px 12px}
.badge-accent{background:var(--accent);color:var(--brand-deep)}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- hero ---------- */
.hero{padding:72px 0 64px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-title{font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-.02em}
.hero-title-sub{display:block;margin-top:14px;font-size:20px;font-weight:500;line-height:1.6;letter-spacing:0;color:var(--ink-2)}
.hero-desc{margin-top:22px;font-size:17px;line-height:1.8;color:var(--ink-2);max-width:600px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-media{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-md)}
.hero-media img{width:100%;aspect-ratio:21/9;min-height:230px;object-fit:cover}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,32,26,.45),rgba(6,32,26,.2))}
.hero-media-cap{position:absolute;left:22px;bottom:20px;right:22px;z-index:2;color:#F2F5F0}
.hero-media-cap strong{display:block;font-size:16px;font-weight:700}
.hero-media-cap span{font-size:13px;color:rgba(242,245,240,.82)}
.hero-tag{position:absolute;right:18px;top:18px;z-index:2;background:var(--accent);color:var(--brand-deep);font-size:13px;font-weight:700;border-radius:999px;padding:7px 14px}
@media(max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-title{font-size:36px}
  .hero-title-sub{font-size:18px}
  .hero-media img{aspect-ratio:16/9}
}
@media(max-width:639px){
  .hero{padding:48px 0 44px}
  .hero-title{font-size:30px}
  .hero-title-sub{font-size:17px}
  .hero-actions .btn{width:100%}
}

/* ---------- alt rows ---------- */
.alt-stack{display:flex;flex-direction:column;gap:84px}
.alt-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.alt-row.reverse .alt-text{order:2}
.alt-row.reverse .alt-media{order:1}
.alt-media{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-sm);transition:box-shadow .3s ease,transform .3s ease,border-color .3s ease}
.alt-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s ease}
.alt-media:hover{box-shadow:var(--shadow-lg);border-color:rgba(200,241,53,.55);transform:translateY(-2px)}
.alt-media:hover img{transform:scale(1.02)}
.alt-index{font-family:var(--font-mono);font-size:13px;font-weight:700;color:var(--brand);background:var(--accent);border-radius:8px;padding:4px 10px;display:inline-block;margin-bottom:16px}
.alt-text h3{font-size:24px;line-height:1.4}
.alt-text p{margin-top:14px;font-size:16px;line-height:1.85;color:var(--ink-2);max-width:560px}
.alt-points{margin-top:20px;display:flex;flex-direction:column;gap:10px}
.alt-points span{display:flex;gap:10px;font-size:15px;line-height:1.7;color:var(--ink-2)}
.alt-points i{color:var(--brand);margin-top:5px;font-size:12px}
@media(max-width:900px){
  .alt-stack{gap:64px}
  .alt-row{grid-template-columns:1fr;gap:26px}
  .alt-row.reverse .alt-text{order:1}
  .alt-row.reverse .alt-media{order:2}
  .alt-text h3{font-size:21px}
}

/* ---------- definition list ---------- */
.dl-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-sm);overflow:hidden}
.dl-row{display:grid;grid-template-columns:220px 1fr;gap:24px;padding:24px 28px;border-top:1px solid var(--line);transition:background .2s ease}
.dl-row:first-child{border-top:0}
.dl-row:hover{background:#FAFBF8}
.dl-key{display:flex;align-items:center;gap:12px;font-size:14px;font-weight:700;color:var(--brand);letter-spacing:.02em}
.dl-key::before{content:"";width:3px;height:18px;border-radius:3px;background:var(--accent);display:block}
.dl-val{font-size:16px;line-height:1.8;color:var(--ink-2)}
@media(max-width:768px){.dl-row{grid-template-columns:1fr;gap:10px;padding:20px}}

/* ---------- stat band ---------- */
.stat-band{background:var(--brand-deep);color:#F2F5F0}
.stat-band .sec-head h2{color:#F2F5F0}
.stat-band .sec-head p{color:rgba(242,245,240,.72)}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:32px;margin-top:8px}
.stat{border-top:1px solid rgba(242,245,240,.16);padding-top:22px}
.stat-num{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:40px;font-weight:700;color:var(--accent);line-height:1.1;letter-spacing:-.02em}
.stat-suffix{font-family:var(--font-mono);font-size:18px;color:var(--accent);margin-left:4px;font-weight:600}
.stat-label{margin-top:10px;font-size:15px;font-weight:600;color:#F2F5F0}
.stat-note{margin-top:6px;font-size:13px;line-height:1.7;color:rgba(242,245,240,.62)}
@media(max-width:1023px){.stat-grid{grid-template-columns:repeat(2,1fr);gap:26px}}
@media(max-width:520px){.stat-grid{grid-template-columns:1fr}.stat-num{font-size:34px}}

/* ---------- faq ---------- */
.faq{max-width:860px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;text-align:left;background:transparent;border:0;padding:22px 4px;font-size:17px;font-weight:600;color:var(--ink);cursor:pointer;transition:color .2s ease}
.faq-q:hover{color:var(--brand)}
.faq-icon{flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:var(--chip);color:var(--brand);display:inline-flex;align-items:center;justify-content:center;font-size:13px;transition:transform .24s ease,background .24s ease}
.faq-item.open .faq-icon{transform:rotate(180deg);background:var(--accent)}
.faq-a{overflow:hidden;max-height:0;transition:max-height .24s ease}
.faq-a-inner{padding:0 40px 22px 4px;font-size:16px;line-height:1.8;color:var(--ink-2)}
@media(max-width:639px){.faq-q{font-size:16px;padding:18px 2px}.faq-a-inner{padding-right:12px}}

/* ---------- cta band ---------- */
.cta-band{background:var(--brand);border-radius:24px;padding:56px;display:grid;grid-template-columns:1.2fr .8fr;gap:40px;align-items:center;color:#F2F5F0;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;background:rgba(200,241,53,.14)}
.cta-band h2{color:#F2F5F0;font-size:30px;line-height:1.35;position:relative}
.cta-band p{margin-top:14px;font-size:16px;line-height:1.8;color:rgba(242,245,240,.78);max-width:620px;position:relative}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative}
.cta-privacy{margin-top:18px;font-size:13px;color:rgba(242,245,240,.6);line-height:1.7;position:relative}
@media(max-width:900px){.cta-band{grid-template-columns:1fr;padding:36px 26px;border-radius:20px;gap:26px}.cta-band h2{font-size:24px}.cta-actions .btn{width:100%}}
@media(max-width:639px){.cta-band{padding:30px 20px}}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-deep);color:#F2F5F0;margin-top:96px;border-top:1px solid rgba(200,241,53,.28)}
.foot-top{padding:64px 0 28px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px}
.foot-brand .brand-text{color:#F2F5F0}
.foot-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(242,245,240,.68);max-width:360px}
.foot-title{font-size:14px;font-weight:600;color:var(--accent);margin-bottom:16px;letter-spacing:.02em}
.foot-links{display:flex;flex-direction:column;gap:11px}
.foot-links a{font-size:14px;color:rgba(242,245,240,.78);transition:color .2s ease}
.foot-links a:hover{color:var(--accent)}
.foot-contact{display:flex;flex-direction:column;gap:12px}
.foot-contact span{display:flex;gap:10px;font-size:14px;line-height:1.7;color:rgba(242,245,240,.78)}
.foot-contact i{color:var(--accent);margin-top:4px;font-size:13px}
.foot-bottom{margin-top:44px;padding-top:22px;border-top:1px solid rgba(242,245,240,.14);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:rgba(242,245,240,.55)}
@media(max-width:1023px){.foot-grid{grid-template-columns:1fr 1fr;gap:32px}}
@media(max-width:639px){.site-footer{margin-top:56px}.foot-grid{grid-template-columns:1fr}.foot-top{padding:44px 0 22px}}

/* ---------- modal / drawer ---------- */
.mask{position:fixed;inset:0;background:rgba(6,32,26,.45);opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease;z-index:90}
.mask.show{opacity:1;visibility:visible}
.modal{position:fixed;z-index:100;top:50%;left:50%;width:480px;max-width:calc(100vw - 40px);transform:translate(-50%,-46%);background:var(--surface);border-radius:20px;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transition:opacity .28s ease,transform .28s ease,visibility .28s ease;max-height:88vh;overflow:auto}
.modal.show{opacity:1;visibility:visible;transform:translate(-50%,-50%)}
.modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:26px 26px 0}
.modal-head h3{font-size:21px}
.modal-head p{margin-top:8px;font-size:14px;line-height:1.75;color:var(--ink-2)}
.modal-close{background:var(--chip);border:0;width:34px;height:34px;border-radius:10px;cursor:pointer;color:var(--ink-2);transition:background .2s ease,color .2s ease;flex:0 0 auto}
.modal-close:hover{background:var(--accent);color:var(--brand-deep)}
.modal-body{padding:22px 26px 26px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
.field input,.field select,.field textarea{width:100%;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:0 14px;height:48px;font-size:15px;outline:none;transition:border-color .2s ease,box-shadow .2s ease}
.field textarea{height:96px;padding:12px 14px;line-height:1.7;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 2px var(--accent)}
.field .err{display:none;margin-top:6px;font-size:13px;color:var(--accent-2)}
.field.invalid input,.field.invalid select{border-color:var(--accent-2)}
.field.invalid .err{display:block}
.field-note{margin-top:16px;font-size:13px;line-height:1.7;color:var(--muted)}
.field-note a{color:var(--brand);border-bottom:1px solid var(--accent)}
.form-ok{display:none;text-align:center;padding:36px 26px 40px}
.form-ok.show{display:block}
.form-ok i{font-size:36px;color:var(--brand);background:var(--accent);width:72px;height:72px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center}
.form-ok p{margin-top:18px;font-size:16px;color:var(--ink-2)}
.form-ok button{margin-top:22px}
@media(max-width:639px){
  .modal{top:auto;bottom:0;left:0;right:0;width:100%;max-width:100%;transform:translateY(100%);border-radius:18px 18px 0 0;max-height:92vh}
  .modal.show{transform:translateY(0)}
  .modal-grip{width:44px;height:4px;border-radius:999px;background:var(--line);margin:12px auto 0}
}

/* mobile drawer */
.drawer{position:fixed;top:0;right:0;bottom:0;width:min(340px,86vw);background:var(--surface);z-index:100;transform:translateX(105%);transition:transform .28s ease;display:flex;flex-direction:column;padding:22px;overflow:auto;box-shadow:var(--shadow-lg)}
.drawer.show{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-links{display:flex;flex-direction:column}
.drawer-links a{padding:15px 2px;font-size:16px;font-weight:600;color:var(--ink);border-bottom:1px solid var(--line)}
.drawer-links a.is-active{color:var(--brand)}
.drawer-links a.is-active::before{content:"";display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--accent);margin-right:10px;vertical-align:middle}
.drawer .btn{margin-top:24px}

/* search panel */
.search-panel{position:fixed;inset:0;background:rgba(246,247,244,.98);z-index:110;padding:22px;display:none}
.search-panel.show{display:block}
.search-panel .sp-inner{max-width:760px;margin:0 auto}
.search-panel .sp-close{float:right;background:var(--chip);border:0;width:38px;height:38px;border-radius:12px;cursor:pointer}
.search-panel input{width:100%;height:56px;border:1px solid var(--line);border-radius:14px;padding:0 18px;font-size:17px;margin-top:26px;outline:none;background:var(--surface)}
.search-panel input:focus{border-color:var(--brand);box-shadow:0 0 0 2px var(--accent)}
.sp-hot{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.sp-hot span{font-size:13px;color:var(--muted)}

/* reveal */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1)}
.js .reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .js .reveal{opacity:1!important;transform:none!important;transition:none!important}
  *{animation:none!important;transition:none!important}
}

/* roulang page: category4 */
:root{
    --bg:#F6F7F4;
    --surface:#FFFFFF;
    --ink:#0F1A15;
    --ink-2:#44524B;
    --muted:#7C8A83;
    --line:#E3E7E1;
    --brand:#10352A;
    --brand-deep:#06201A;
    --accent:#C8F135;
    --accent-2:#FF7A3D;
    --shadow-sm:0 1px 2px rgba(15,26,21,.06);
    --shadow-md:0 8px 24px -12px rgba(15,26,21,.18);
    --shadow-lg:0 18px 40px -20px rgba(15,26,21,.28);
    --r-card:18px;
    --r-btn:12px;
    --r-input:10px;
    --r-img:14px;
    --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
    --font-mono:ui-monospace,"JetBrains Mono","SFMono-Regular",Menlo,Consolas,monospace;
  }
  *{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:var(--font-sans);
    font-size:17px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit}
  h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}
  ul,ol{padding:0;list-style:none}
  .mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
  .container{width:100%;max-width:1240px;margin:0 auto;padding:0 24px}
  .section{padding:96px 0}
  .section-tight{padding:72px 0}
  .section-head{max-width:760px;margin-bottom:40px}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:13px;letter-spacing:.02em;color:var(--brand);
    background:#EEF1EC;border-radius:999px;padding:6px 14px;font-weight:600;
  }
  .eyebrow i{color:var(--brand);font-size:12px}
  h1{font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-.02em}
  h2{font-size:28px;line-height:1.35;font-weight:700;letter-spacing:-.01em}
  h3{font-size:20px;line-height:1.5;font-weight:700}
  .lead{font-size:17px;line-height:1.75;color:var(--ink-2);max-width:760px}
  .muted{color:var(--muted)}
  .divider{height:1px;background:var(--line);border:0;margin:0}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(246,247,244,.86);
    backdrop-filter:blur(12px);
    -webkit-backdrop-filter:blur(12px);
    border-bottom:1px solid var(--line);
  }
  .nav-inner{display:flex;align-items:center;gap:22px;height:64px}
  .brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.01em;color:var(--ink);flex-shrink:0}
  .brand-mark{
    position:relative;width:28px;height:28px;border-radius:9px;background:var(--accent);
    display:grid;place-items:center;box-shadow:inset 0 0 0 1px rgba(15,26,21,.10);
  }
  .brand-mark::before{
    content:"";width:15px;height:9px;border:2px solid var(--brand);
    border-radius:50%;border-top-color:transparent;transform:rotate(-16deg);
  }
  .brand-dot{position:absolute;top:5px;right:5px;width:5px;height:5px;border-radius:50%;background:var(--brand)}
  .brand-text{font-size:17px}
  .nav-links{display:flex;align-items:center;gap:28px;margin-left:6px}
  .nav-link{
    position:relative;font-size:15px;font-weight:500;color:var(--ink-2);
    padding:8px 0;transition:color .2s ease;white-space:nowrap;
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;right:50%;bottom:2px;height:2px;
    background:var(--accent);border-radius:2px;transition:left .2s ease,right .2s ease;
  }
  .nav-link:hover{color:var(--brand)}
  .nav-link:hover::after,.nav-link.is-active::after{left:0;right:0}
  .nav-link.is-active{color:var(--ink);font-weight:600}
  .nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
  .search-box{
    display:flex;align-items:center;gap:8px;width:240px;height:40px;
    padding:0 10px 0 12px;background:var(--surface);
    border:1px solid var(--line);border-radius:var(--r-btn);
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .search-box i{color:var(--muted);font-size:13px}
  .search-box input{
    border:0;outline:0;background:transparent;flex:1;min-width:0;
    font-size:14px;color:var(--ink);font-family:inherit;
  }
  .search-box input::placeholder{color:var(--muted)}
  .search-box:hover{border-color:rgba(16,53,42,.4)}
  .search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 2px rgba(200,241,53,.55)}
  .kbd{
    font-size:11px;color:var(--muted);border:1px solid var(--line);
    border-radius:6px;padding:2px 6px;background:#FAFBF8;flex-shrink:0;
  }
  .nav-quiet{font-size:15px;font-weight:500;color:var(--ink-2);transition:color .2s ease;white-space:nowrap}
  .nav-quiet:hover{color:var(--brand)}
  .icon-btn{
    display:none;width:40px;height:40px;border-radius:var(--r-btn);
    border:1px solid var(--line);background:var(--surface);color:var(--ink);
    align-items:center;justify-content:center;cursor:pointer;transition:border-color .2s ease,color .2s ease;
  }
  .icon-btn:hover{border-color:var(--brand);color:var(--brand)}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    font-size:15px;font-weight:600;line-height:1;padding:12px 24px;
    border-radius:var(--r-btn);border:1px solid transparent;cursor:pointer;
    transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
    white-space:nowrap;
  }
  .btn-primary{background:var(--brand);color:#fff}
  .btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--shadow-md)}
  .btn-primary:active{transform:scale(.98)}
  .btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
  .btn-ghost:hover{border-color:var(--brand);background:var(--surface)}
  .btn-pill{border-radius:999px}
  .btn-sm{padding:10px 18px;font-size:14px}
  .btn-block{width:100%}
  .btn i{transition:transform .2s ease}
  .btn:hover i.fa-arrow-right{transform:translateX(4px)}
  .btn:focus-visible,.nav-link:focus-visible,.icon-btn:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
    outline:2px solid var(--accent);outline-offset:2px;
  }
  .link-underline{
    font-weight:600;font-size:15px;color:var(--brand);
    border-bottom:1px solid var(--accent);padding-bottom:2px;transition:border-width .15s ease;
  }
  .link-underline:hover{border-bottom-width:2px}

  /* ---------- breadcrumb ---------- */
  .crumb{
    display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);
    padding:20px 0 0;
  }
  .crumb a{color:var(--muted);transition:color .2s ease}
  .crumb a:hover{color:var(--brand)}
  .crumb .sep{opacity:.7}
  .crumb .current{color:var(--ink)}

  /* ---------- hero ---------- */
  .cat-hero{padding:32px 0 72px}
  .hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
  .cat-hero h1{margin:18px 0 16px;max-width:15ch}
  .hero-sub{font-size:20px;line-height:1.6;color:var(--ink-2);max-width:34ch}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
  .hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
  .tag{
    display:inline-flex;align-items:center;gap:6px;
    font-size:13px;letter-spacing:.02em;font-weight:500;
    background:#EEF1EC;color:var(--brand);border-radius:999px;padding:6px 13px;
  }
  .tag-accent{background:var(--accent);color:var(--brand-deep);font-weight:600}
  .hero-media{
    position:relative;border-radius:var(--r-card);overflow:hidden;
    box-shadow:var(--shadow-md);aspect-ratio:16/10;background:var(--brand-deep);
  }
  .hero-media img{width:100%;height:100%;object-fit:cover}
  .hero-media::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(6,32,26,.10),rgba(6,32,26,.42));
  }
  .hero-media-caption{
    position:absolute;left:20px;bottom:16px;z-index:2;color:#F2F5F0;
    font-size:13px;letter-spacing:.02em;
  }

  /* ---------- spec list (定义列表) ---------- */
  .spec-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--shadow-sm);padding:8px 28px}
  .spec-row{
    display:grid;grid-template-columns:220px 1fr;gap:24px;align-items:start;
    padding:22px 0;border-bottom:1px solid var(--line);
  }
  .spec-row:last-child{border-bottom:0}
  .spec-key{font-size:13px;letter-spacing:.02em;color:var(--muted);font-weight:600;padding-top:4px}
  .spec-val{font-size:16px;line-height:1.75;color:var(--ink)}
  .spec-val strong{font-weight:700}
  .metric-row{
    display:grid;grid-template-columns:repeat(4,1fr);gap:0;
    margin-top:36px;border:1px solid var(--line);border-radius:var(--r-card);
    background:var(--surface);overflow:hidden;
  }
  .metric{padding:24px 22px;border-right:1px solid var(--line)}
  .metric:last-child{border-right:0}
  .metric-num{font-size:34px;font-weight:700;color:var(--brand);line-height:1.2;letter-spacing:-.02em}
  .metric-num .unit{font-size:15px;font-weight:600;margin-left:4px;color:var(--ink-2)}
  .metric-label{display:block;font-size:14px;color:var(--ink-2);margin-top:6px}

  /* ---------- dark band ---------- */
  .band-dark{background:var(--brand-deep);color:#F2F5F0;padding:80px 0}
  .band-dark h2{color:#fff}
  .band-dark .lead{color:rgba(242,245,240,.78)}
  .band-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:40px}
  .band-item{border-top:1px solid rgba(242,245,240,.22);padding-top:20px}
  .band-num{
    font-family:var(--font-mono);font-variant-numeric:tabular-nums;
    font-size:38px;font-weight:700;color:var(--accent);line-height:1.1;letter-spacing:-.02em;
  }
  .band-num small{font-size:15px;color:#F2F5F0;font-weight:600;margin-left:6px}
  .band-label{display:block;font-size:14px;color:rgba(242,245,240,.72);margin-top:10px;line-height:1.7}

  /* ---------- scenario list ---------- */
  .split{display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
  .num-list{margin-top:8px}
  .num-item{position:relative;padding:0 0 26px 26px;border-left:1px solid var(--line)}
  .num-item:last-child{padding-bottom:0;border-left-color:transparent}
  .num-item::before{
    content:"";position:absolute;left:-2px;top:6px;width:3px;height:18px;
    background:var(--accent);border-radius:2px;
  }
  .num-item .idx{
    font-family:var(--font-mono);font-variant-numeric:tabular-nums;
    font-size:13px;letter-spacing:.02em;color:var(--muted);display:block;margin-bottom:6px;
  }
  .num-item h3{margin-bottom:6px}
  .num-item p{font-size:15px;line-height:1.7;color:var(--ink-2);max-width:56ch}
  .media-frame{border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-md);background:var(--surface)}
  .media-frame img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;transition:transform .4s ease}
  .media-frame:hover img{transform:scale(1.02)}

  /* ---------- plan / 合作方式 ---------- */
  .plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:8px}
  .plan-card{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
    padding:26px 24px;box-shadow:var(--shadow-sm);
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .plan-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:rgba(200,241,53,.6)}
  .plan-card h3{margin:14px 0 8px}
  .plan-card p{font-size:15px;line-height:1.7;color:var(--ink-2)}
  .plan-icon{
    width:40px;height:40px;border-radius:12px;background:#EEF1EC;color:var(--brand);
    display:grid;place-items:center;font-size:16px;
  }
  .plan-foot{
    margin-top:18px;padding-top:14px;border-top:1px solid var(--line);
    font-size:13px;color:var(--muted);letter-spacing:.02em;
  }

  /* ---------- FAQ ---------- */
  .faq-wrap{max-width:860px}
  .faq-item{border-bottom:1px solid var(--line)}
  .faq-item summary{
    display:flex;align-items:center;justify-content:space-between;gap:20px;
    list-style:none;cursor:pointer;padding:20px 0;min-height:60px;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-q{font-size:17px;font-weight:600;color:var(--ink);line-height:1.6}
  .faq-icon{position:relative;width:18px;height:18px;flex-shrink:0;transition:transform .24s ease}
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;background:var(--brand);border-radius:2px;
  }
  .faq-icon::before{left:0;right:0;top:8px;height:2px}
  .faq-icon::after{top:0;bottom:0;left:8px;width:2px;transition:opacity .24s ease}
  .faq-item[open] .faq-icon{transform:rotate(45deg)}
  .faq-item[open] .faq-icon::after{opacity:0}
  .faq-a{padding:0 40px 24px 0;font-size:16px;line-height:1.8;color:var(--ink-2)}

  /* ---------- CTA band ---------- */
  .cta-band{
    background:var(--brand);color:#fff;border-radius:24px;padding:48px;
    display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;
    box-shadow:var(--shadow-md);
  }
  .cta-band h2{color:#fff}
  .cta-band p{color:rgba(242,245,240,.8);font-size:15px;line-height:1.7;margin-top:10px;max-width:60ch}
  .cta-band .btn-primary{background:var(--accent);color:var(--brand-deep)}
  .cta-band .btn-primary:hover{background:#D7F75C;color:var(--brand-deep)}
  .cta-actions{display:flex;gap:12px;flex-wrap:wrap}
  .privacy-note{font-size:13px;color:rgba(242,245,240,.66);margin-top:14px;grid-column:1/-1}

  /* ---------- footer ---------- */
  .site-footer{background:var(--brand-deep);color:#F2F5F0;border-top:1px solid rgba(200,241,53,.35);padding:64px 0 28px;margin-top:96px}
  .foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px}
  .foot-brand .brand{color:#fff}
  .foot-brand .brand-text{color:#fff}
  .foot-brand p{font-size:14px;line-height:1.8;color:rgba(242,245,240,.7);margin-top:16px;max-width:34ch}
  .foot-title{font-size:14px;font-weight:600;color:var(--accent);margin-bottom:16px}
  .foot-links{display:flex;flex-direction:column;gap:10px}
  .foot-links a{font-size:14px;color:rgba(242,245,240,.78);transition:color .2s ease}
  .foot-links a:hover{color:var(--accent)}
  .foot-contact{display:flex;flex-direction:column;gap:12px}
  .foot-contact span{font-size:14px;color:rgba(242,245,240,.78);line-height:1.7;display:flex;gap:8px}
  .foot-contact i{color:var(--accent);margin-top:5px;font-size:12px}
  .foot-bottom{
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    border-top:1px solid rgba(242,245,240,.16);margin-top:44px;padding-top:20px;
    font-size:13px;color:rgba(242,245,240,.58);
  }

  /* ---------- drawer & search panel ---------- */
  .drawer{
    position:fixed;top:0;right:0;height:100%;width:86%;max-width:360px;z-index:90;
    background:var(--surface);box-shadow:var(--shadow-lg);
    transform:translateY(14px);opacity:0;pointer-events:none;
    transition:transform .28s cubic-bezier(.22,.61,.36,1),opacity .28s ease;
    padding:22px;display:flex;flex-direction:column;gap:6px;overflow-y:auto;
  }
  .drawer.is-open{transform:translateY(0);opacity:1;pointer-events:auto}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
  .drawer a.d-link{font-size:16px;font-weight:600;color:var(--ink);padding:14px 4px;border-bottom:1px solid var(--line)}
  .drawer a.d-link.is-active{color:var(--brand)}
  .drawer a.d-link.is-active::before{content:"";display:inline-block;width:3px;height:14px;background:var(--accent);border-radius:2px;margin-right:10px;vertical-align:-1px}
  .drawer .btn{margin-top:20px}
  .scrim{
    position:fixed;inset:0;background:rgba(6,32,26,.45);z-index:80;
    opacity:0;pointer-events:none;transition:opacity .28s ease;
  }
  .scrim.is-open{opacity:1;pointer-events:auto}
  .search-panel{
    position:fixed;left:0;right:0;top:0;z-index:95;background:var(--surface);
    padding:22px 0 26px;box-shadow:var(--shadow-md);
    transform:translateY(-16px);opacity:0;pointer-events:none;
    transition:transform .28s ease,opacity .28s ease;
  }
  .search-panel.is-open{transform:translateY(0);opacity:1;pointer-events:auto}
  .search-panel .inner{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:var(--r-btn);padding:0 14px;height:52px}
  .search-panel input{flex:1;border:0;outline:0;font-size:16px;font-family:inherit;background:transparent}
  .hot-words{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}

  /* ---------- modal ---------- */
  .modal-mask{
    position:fixed;inset:0;background:rgba(6,32,26,.45);z-index:100;
    display:flex;align-items:center;justify-content:center;padding:20px;
    opacity:0;pointer-events:none;transition:opacity .28s ease;
  }
  .modal-mask.is-open{opacity:1;pointer-events:auto}
  .modal-card{
    width:100%;max-width:480px;background:var(--surface);border-radius:var(--r-card);
    padding:28px;box-shadow:var(--shadow-lg);max-height:90vh;overflow-y:auto;
    transform:translateY(14px);transition:transform .28s cubic-bezier(.22,.61,.36,1);
  }
  .modal-mask.is-open .modal-card{transform:translateY(0)}
  .modal-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:8px}
  .modal-close{
    width:34px;height:34px;border-radius:10px;border:1px solid var(--line);
    background:var(--surface);color:var(--ink-2);cursor:pointer;
    display:grid;place-items:center;flex-shrink:0;
  }
  .modal-close:hover{border-color:var(--brand);color:var(--brand)}
  .modal-desc{font-size:14px;line-height:1.75;color:var(--ink-2);margin-bottom:20px}
  .field{margin-bottom:16px}
  .field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
  .field input,.field select,.field textarea{
    width:100%;height:48px;border:1px solid var(--line);border-radius:var(--r-input);
    padding:0 14px;font-size:15px;font-family:inherit;color:var(--ink);
    background:var(--surface);outline:0;transition:border-color .2s ease,box-shadow .2s ease;
  }
  .field textarea{height:104px;padding:12px 14px;line-height:1.7;resize:vertical}
  .field input:focus,.field select:focus,.field textarea:focus{
    border-color:var(--brand);box-shadow:0 0 0 2px rgba(200,241,53,.6);
  }
  .field.has-error input,.field.has-error select{border-color:var(--accent-2)}
  .field-error{display:none;font-size:14px;color:var(--accent-2);margin-top:6px}
  .field.has-error .field-error{display:block}
  .form-note{font-size:13px;color:var(--muted);line-height:1.7;margin-top:14px}
  .form-note a{color:var(--brand);border-bottom:1px solid var(--accent)}
  .form-success{display:none;text-align:center;padding:20px 0 4px}
  .form-success.is-visible{display:block}
  .form-success i{font-size:34px;color:var(--brand)}
  .form-success p{margin-top:12px;font-size:15px;color:var(--ink-2)}

  /* ---------- reveal ---------- */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .48s cubic-bezier(.22,.61,.36,1),transform .48s cubic-bezier(.22,.61,.36,1)}
  .reveal.is-in{opacity:1;transform:none}

  /* ---------- responsive ---------- */
  @media (max-width:1280px){
    .search-box{width:200px}
    .nav-links{gap:22px}
  }
  @media (max-width:1080px){
    .nav-links,.search-box,.nav-quiet{display:none}
    .icon-btn{display:inline-flex}
  }
  @media (max-width:1024px){
    .section{padding:72px 0}
    .section-tight{padding:56px 0}
    h1{font-size:38px}
    h2{font-size:25px}
    .hero-grid{grid-template-columns:1fr;gap:32px}
    .cat-hero h1{max-width:none}
    .hero-sub{font-size:18px;max-width:none}
    .split{grid-template-columns:1fr;gap:32px}
    .plan-grid{grid-template-columns:repeat(2,1fr)}
    .metric-row{grid-template-columns:repeat(2,1fr)}
    .metric:nth-child(2){border-right:0}
    .metric:nth-child(1),.metric:nth-child(2){border-bottom:1px solid var(--line)}
    .band-grid{grid-template-columns:repeat(2,1fr);gap:28px}
    .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
    .cta-band{grid-template-columns:1fr;padding:36px}
  }
  @media (max-width:768px){
    .container{padding:0 20px}
    .section{padding:56px 0}
    h1{font-size:30px}
    h2{font-size:22px}
    h3{font-size:18px}
    body{font-size:16px}
    .spec-wrap{padding:4px 20px}
    .spec-row{grid-template-columns:1fr;gap:6px;padding:18px 0}
    .spec-key{padding-top:0}
    .plan-grid{grid-template-columns:1fr}
    .metric-row{grid-template-columns:1fr}
    .metric{border-right:0;border-bottom:1px solid var(--line)}
    .metric:last-child{border-bottom:0}
    .band-grid{grid-template-columns:1fr}
    .band-dark{padding:56px 0}
    .site-footer{padding:48px 0 24px;margin-top:56px}
    .foot-grid{grid-template-columns:1fr;gap:28px}
    .modal-mask{align-items:flex-end;padding:0}
    .modal-card{
      max-width:none;border-radius:18px 18px 0 0;padding:22px 20px 26px;
      transform:translateY(28px);
    }
    .drawer{width:88%}
    .faq-a{padding-right:8px}
  }
  @media (prefers-reduced-motion:reduce){
    *{animation:none!important;transition:none!important}
    .reveal{opacity:1;transform:none}
    html{scroll-behavior:auto}
  }