/* roulang page: index */
:root{
  --c-bg:#F5F3EE;
  --c-surface:#FFFFFF;
  --c-ink:#15171B;
  --c-ink-2:#5A5F66;
  --c-muted:#6B6F76;
  --c-accent:#DE3A2B;
  --c-accent-dark:#C22F22;
  --c-teal:#0FA98E;
  --c-line:#E3DFD6;
  --c-soft:#EDE9E0;
  --r-card:14px;
  --r-img:18px;
  --r-btn:10px;
  --space-section:clamp(72px,9vw,140px);
  --shadow-1:0 1px 2px rgba(21,23,27,.06);
  --shadow-2:0 12px 32px -12px rgba(21,23,27,.16);
  --maxw:1200px;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Inter","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.88;
  letter-spacing:.01em;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:-1;
  background:
    radial-gradient(760px 420px at 88% -6%, rgba(222,58,43,.07), transparent 70%),
    radial-gradient(560px 340px at 4% 12%, rgba(15,169,142,.05), transparent 72%);
}
img{display:block;max-width:100%;height:auto;border:0}
a{color:inherit;text-decoration:none;background:transparent}
a:hover{color:inherit}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
p{line-height:1.9}
img[src=""],img:not([src]){background:var(--c-soft)}
::selection{background:rgba(222,58,43,.18)}
:focus-visible{outline:2px solid rgba(222,58,43,.5);outline-offset:2px}

.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:var(--space-section) 0;scroll-margin-top:96px}
.section--tight{padding-top:clamp(40px,5vw,72px)}
.section--dark{background:var(--c-ink);color:var(--c-bg)}
.section--dark .section-desc{color:rgba(245,243,238,.72)}
.section-head{max-width:760px;margin-bottom:clamp(32px,4.4vw,58px)}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-num);font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--c-accent);margin-bottom:16px}
.eyebrow::before{content:"";width:20px;height:2px;border-radius:2px;background:var(--c-accent)}
.section--dark .eyebrow{color:#FF8A7C}
.section--dark .eyebrow::before{background:#FF8A7C}
h2{font-size:clamp(26px,3.2vw,40px);line-height:1.22;font-weight:700;letter-spacing:-.012em;margin-bottom:16px}
h3{font-size:clamp(19px,2vw,22px);line-height:1.45;font-weight:600;letter-spacing:-.005em}
.section-desc{font-size:16.5px;color:var(--c-ink-2);max-width:720px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-btn);border:1px solid transparent;font-size:14.5px;font-weight:600;letter-spacing:.02em;white-space:nowrap;transition:background .2s ease,border-color .2s ease,color .2s ease,box-shadow .2s ease,transform .2s ease}
.btn .arrow{transition:transform .22s ease}
.btn:hover .arrow{transform:translateX(3px)}
.btn-primary{background:var(--c-accent);border-color:var(--c-accent);color:#fff;box-shadow:0 1px 2px rgba(222,58,43,.24)}
.btn-primary:hover{background:var(--c-accent-dark);border-color:var(--c-accent-dark);color:#fff}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:rgba(21,23,27,.16);color:var(--c-ink)}
.btn-ghost:hover{border-color:var(--c-accent);color:var(--c-accent)}
.btn-sm{height:38px;padding:0 16px;font-size:13.5px;border-radius:9px}
.btn-dark{background:var(--c-ink);border-color:var(--c-ink);color:#F5F3EE}
.btn-dark:hover{background:#000;border-color:#000;color:#fff}
.btn-lg{height:52px;padding:0 26px;font-size:15.5px}

/* ---------- 顶部命令栏 ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:120;background:rgba(245,243,238,.86);-webkit-backdrop-filter:saturate(150%) blur(10px);backdrop-filter:saturate(150%) blur(10px);border-bottom:1px solid transparent;transition:border-color .28s ease,box-shadow .28s ease,background .28s ease}
.site-header.is-scrolled{background:rgba(245,243,238,.97);border-bottom-color:var(--c-line);box-shadow:var(--shadow-1)}
.nav-wrap{display:flex;align-items:center;gap:18px;height:68px;transition:height .28s ease}
.site-header.is-scrolled .nav-wrap{height:56px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;min-width:0}
.brand-mark{position:relative;flex:0 0 26px;width:26px;height:26px;border-radius:8px;background:var(--c-accent);box-shadow:0 1px 2px rgba(222,58,43,.3)}
.brand-mark::after{content:"";position:absolute;inset:7px;border:2px solid #fff;border-radius:3px;transform:rotate(45deg)}
.brand-text{display:flex;align-items:baseline;gap:6px;font-size:17px;font-weight:800;letter-spacing:-.015em;line-height:1.1;white-space:nowrap}
.brand-sub{font-size:11.5px;font-weight:500;letter-spacing:.08em;color:var(--c-muted)}
.main-nav{display:flex;align-items:center;justify-content:center;gap:2px;flex:1 1 auto;min-width:0}
.nav-link{position:relative;display:inline-flex;align-items:center;padding:8px 12px;border-radius:8px;font-size:14.5px;font-weight:500;color:var(--c-ink-2);white-space:nowrap;transition:color .2s ease,background .2s ease}
.nav-link:hover{color:var(--c-ink);background:rgba(21,23,27,.055)}
.nav-link.is-active{color:var(--c-ink);font-weight:700}
.nav-link.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;border-radius:2px;background:var(--c-accent)}
.nav-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.command-search{position:relative;display:flex;align-items:center;height:38px;width:196px;padding:0 8px 0 34px;border:1px solid var(--c-line);border-radius:10px;background:#FFF;transition:width .22s ease,border-color .2s ease,box-shadow .2s ease}
.command-search:focus-within{width:228px;border-color:var(--c-accent);box-shadow:0 0 0 2px rgba(222,58,43,.18)}
.cs-icon{position:absolute;left:11px;top:50%;transform:translateY(-50%);display:flex;color:var(--c-muted)}
.command-search input{flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;box-shadow:none;margin:0;font-family:var(--font-sans);font-size:13.5px;color:var(--c-ink);outline:none}
.command-search input::placeholder{color:#9AA0A7}
.command-search input:focus{box-shadow:none}
.kbd{flex:0 0 auto;font-family:var(--font-num);font-size:11px;line-height:1;color:var(--c-muted);background:#FAF9F6;border:1px solid var(--c-line);border-radius:5px;padding:3px 5px}
.nav-toggle{display:none;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--c-line);border-radius:10px;background:#fff;color:var(--c-ink)}
.nav-toggle:hover{border-color:var(--c-accent);color:var(--c-accent)}

/* ---------- Hero ---------- */
.hero{padding-top:132px;padding-bottom:clamp(56px,7vw,96px);position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:clamp(28px,4vw,60px);align-items:center}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:6px 13px;border:1px solid var(--c-line);border-radius:999px;background:#fff;font-size:12.5px;font-weight:600;letter-spacing:.04em;color:var(--c-ink-2);margin-bottom:22px}
.hero-tag .dot{width:7px;height:7px;border-radius:50%;background:var(--c-teal);box-shadow:0 0 0 3px rgba(15,169,142,.16)}
.hero h1{font-size:clamp(33px,4.9vw,58px);line-height:1.1;font-weight:800;letter-spacing:-.022em;margin-bottom:22px}
.hero h1 em{font-style:normal;color:var(--c-accent)}
.hero-sub{font-size:clamp(16px,1.5vw,18.5px);line-height:1.85;color:var(--c-ink-2);max-width:560px;margin-bottom:32px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:12px}
.hero-note{font-size:13px;letter-spacing:.04em;color:var(--c-muted)}
.hero-visual{position:relative;border:1px solid var(--c-line);border-radius:var(--r-img);overflow:hidden;background:var(--c-soft);aspect-ratio:4/3.5;box-shadow:var(--shadow-1)}
.hero-visual img{width:100%;height:100%;object-fit:cover}
.hero-visual::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(21,23,27,0) 38%,rgba(21,23,27,.58) 100%);pointer-events:none}
.hero-badge{position:absolute;left:16px;bottom:16px;z-index:2;display:inline-flex;align-items:center;gap:8px;padding:7px 14px;border-radius:999px;background:rgba(245,243,238,.96);color:var(--c-ink);font-size:12.5px;font-weight:600;letter-spacing:.03em}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--c-teal)}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:clamp(34px,4.4vw,60px);background:var(--c-line);border:1px solid var(--c-line);border-radius:14px;overflow:hidden}
.hero-stats .stat{padding:20px 22px;background:var(--c-bg)}
.stat-num{font-family:var(--font-num);font-size:26px;font-weight:700;line-height:1.1;letter-spacing:-.02em;color:var(--c-ink)}
.stat-num span{font-size:14px;font-weight:600;color:var(--c-muted);margin-left:3px}
.stat-label{margin-top:6px;font-size:13px;letter-spacing:.03em;color:var(--c-muted)}

/* ---------- 卖点：左右交错 ---------- */
.sell-list{display:flex;flex-direction:column;gap:clamp(44px,6vw,92px)}
.sell-row{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,76px);align-items:center}
.sell-text{min-width:0}
.sell-row:nth-child(even) .sell-text{order:2}
.sell-row:nth-child(even) .sell-media{order:1}
.sell-num{font-family:var(--font-num);font-size:clamp(46px,6vw,78px);font-weight:800;line-height:.95;letter-spacing:-.035em;color:transparent;-webkit-text-stroke:1.4px var(--c-accent);margin-bottom:18px}
.sell-text h3{margin-bottom:12px}
.sell-text p{color:var(--c-ink-2);font-size:16px;margin-bottom:18px}
.sell-points{display:flex;flex-direction:column;gap:10px}
.sell-points li{position:relative;padding-left:22px;font-size:14.6px;color:var(--c-ink-2);line-height:1.75}
.sell-points li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;border-radius:2px;background:var(--c-accent);transform:rotate(45deg)}
.sell-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border:1px solid var(--c-line);border-radius:var(--r-img);background:var(--c-soft);box-shadow:var(--shadow-1)}

/* ---------- 演示 ---------- */
.demo-grid{display:grid;grid-template-columns:1.32fr 1fr;gap:clamp(24px,3.6vw,48px);align-items:start}
.demo-stage{position:relative;border:1px solid rgba(245,243,238,.16);border-radius:var(--r-img);overflow:hidden;background:#0E1013}
.demo-pane{display:none}
.demo-pane.is-active{display:block;animation:fadeUp .4s cubic-bezier(.2,.7,.3,1) both}
.demo-pane img{width:100%;aspect-ratio:16/10;object-fit:cover;opacity:.95}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.demo-tabs{display:flex;flex-direction:column;gap:12px}
.demo-tab{display:block;width:100%;text-align:left;padding:17px 19px;border:1px solid rgba(245,243,238,.16);border-radius:12px;background:rgba(245,243,238,.04);color:var(--c-bg);transition:border-color .22s ease,background .22s ease,transform .22s ease}
.demo-tab:hover{transform:translateX(2px);border-color:rgba(255,138,124,.5)}
.demo-tab.is-active{border-color:#FF8A7C;background:rgba(222,58,43,.14);box-shadow:0 0 0 2px rgba(222,58,43,.16)}
.demo-tab .t-idx{display:inline-block;font-family:var(--font-num);font-size:11.5px;font-weight:700;letter-spacing:.14em;color:#FF8A7C;margin-bottom:6px}
.demo-tab .t-title{display:block;font-size:15.5px;font-weight:600;margin-bottom:4px}
.demo-tab .t-desc{display:block;font-size:13.4px;line-height:1.7;color:rgba(245,243,238,.66)}

/* ---------- 证据 ---------- */
.proof-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:clamp(32px,5vw,72px);align-items:start}
.proof-nums{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:rgba(245,243,238,.14);border:1px solid rgba(245,243,238,.14);border-radius:14px;overflow:hidden}
.proof-item{background:var(--c-ink);padding:28px 26px 26px}
.proof-num{font-family:var(--font-num);font-size:clamp(38px,4.6vw,54px);font-weight:800;line-height:1;letter-spacing:-.03em;color:#FF8A7C}
.proof-unit{font-size:15px;font-weight:600;color:rgba(245,243,238,.6);margin-left:4px}
.proof-item p{margin-top:10px;font-size:14px;line-height:1.75;color:rgba(245,243,238,.7)}
.proof-quote{border-left:2px solid #FF8A7C;padding:6px 0 6px 24px}
.proof-quote blockquote{margin:0;font-size:clamp(18px,2vw,22px);line-height:1.75;font-weight:500;color:var(--c-bg)}
.proof-quote cite{display:block;margin-top:18px;font-style:normal;font-size:13px;letter-spacing:.06em;color:rgba(245,243,238,.55)}
.proof-lines{margin-top:clamp(32px,4vw,52px);border-top:1px solid rgba(245,243,238,.14)}
.proof-lines li{display:flex;flex-wrap:wrap;gap:10px 24px;align-items:baseline;padding:16px 0;border-bottom:1px solid rgba(245,243,238,.14);font-size:14.6px;color:rgba(245,243,238,.74)}
.proof-lines li strong{flex:0 0 auto;font-weight:600;color:var(--c-bg);min-width:112px}

/* ---------- 最新信息 ---------- */
.news-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:clamp(28px,3.6vw,44px)}
.news-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.news-card{display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.news-card:hover{transform:translateY(-2px);border-color:var(--c-accent);box-shadow:var(--shadow-2)}
.news-cover{aspect-ratio:16/9;overflow:hidden;background:var(--c-soft);border-bottom:1px solid var(--c-line)}
.news-cover img{width:100%;height:100%;object-fit:cover;transition:transform .38s ease}
.news-card:hover .news-cover img{transform:scale(1.035)}
.news-body{display:flex;flex-direction:column;gap:10px;flex:1 1 auto;padding:18px 20px 20px}
.badge{display:inline-flex;align-items:center;gap:6px;align-self:flex-start;padding:3px 10px;border-radius:999px;font-size:11.5px;font-weight:600;letter-spacing:.05em}
.badge-soft{background:rgba(222,58,43,.09);color:var(--c-accent);border:1px solid rgba(222,58,43,.2)}
.badge-teal{background:rgba(15,169,142,.1);color:#0B7F6C;border:1px solid rgba(15,169,142,.22)}
.news-title{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:16px;font-weight:600;line-height:1.5;color:var(--c-ink)}
.news-excerpt{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;font-size:13.6px;line-height:1.78;color:var(--c-ink-2)}
.news-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:auto;padding-top:12px;border-top:1px solid var(--c-line);font-family:var(--font-num);font-size:12px;letter-spacing:.04em;color:var(--c-muted)}
.news-meta .sep{width:3px;height:3px;border-radius:50%;background:var(--c-line)}
.empty-state{padding:64px 24px;text-align:center;border:1px dashed var(--c-line);border-radius:var(--r-card);background:var(--c-surface);color:var(--c-muted);font-size:15px}

/* ---------- 方案对比 ---------- */
.plan-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:stretch}
.plan{display:flex;flex-direction:column;padding:30px 30px 32px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:16px;box-shadow:var(--shadow-1);transition:border-color .22s ease,box-shadow .22s ease,transform .22s ease}
.plan:hover{transform:translateY(-2px);box-shadow:var(--shadow-2)}
.plan.is-featured{border-color:var(--c-accent);box-shadow:0 0 0 1px rgba(222,58,43,.24),var(--shadow-1)}
.plan-top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:14px}
.plan-name{font-size:19px;font-weight:700;letter-spacing:-.01em}
.plan-desc{font-size:14.4px;line-height:1.8;color:var(--c-ink-2);margin-bottom:22px}
.plan-list{display:flex;flex-direction:column;gap:12px;margin-bottom:28px}
.plan-list li{position:relative;padding-left:26px;font-size:14.6px;line-height:1.75;color:var(--c-ink-2)}
.plan-list li::before{content:"";position:absolute;left:0;top:.42em;width:14px;height:14px;border-radius:50%;background:rgba(21,23,27,.06);border:1px solid var(--c-line)}
.plan.is-featured .plan-list li::before{background:rgba(222,58,43,.1);border-color:rgba(222,58,43,.35)}
.plan-list li::after{content:"";position:absolute;left:4.5px;top:.72em;width:5px;height:8px;border:2px solid var(--c-accent);border-top:0;border-left:0;transform:rotate(42deg)}
.plan .btn{margin-top:auto;width:100%}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:320px 1fr;gap:clamp(28px,5vw,68px);align-items:start}
.faq-aside{position:sticky;top:96px}
.faq-aside h2{font-size:clamp(24px,2.7vw,34px)}
.faq-aside p{font-size:15px;color:var(--c-ink-2)}
.faq-list{border-top:1px solid var(--c-line)}
.faq-item{border-bottom:1px solid var(--c-line)}
.faq-q{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;width:100%;padding:22px 4px;text-align:left;font-size:16.5px;font-weight:600;line-height:1.6;color:var(--c-ink);transition:color .2s ease}
.faq-q:hover{color:var(--c-accent)}
.faq-icon{flex:0 0 auto;display:flex;align-items:center;justify-content:center;width:26px;height:26px;margin-top:2px;border:1px solid var(--c-line);border-radius:50%;color:var(--c-ink-2);transition:transform .28s ease,background .2s ease,color .2s ease,border-color .2s ease}
.faq-item.is-open .faq-icon{transform:rotate(180deg);background:var(--c-accent);border-color:var(--c-accent);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s cubic-bezier(.2,.7,.3,1)}
.faq-a p{padding:0 46px 22px 4px;font-size:15.4px;line-height:1.9;color:var(--c-ink-2)}

/* ---------- 结尾 CTA ---------- */
.end-cta{position:relative;overflow:hidden;border-radius:var(--r-img);border:1px solid rgba(245,243,238,.16);background:linear-gradient(180deg,rgba(21,23,27,.86),rgba(21,23,27,.96)),url('/assets/images/backpic/back-3.png') center/cover no-repeat;color:var(--c-bg);padding:clamp(40px,6vw,76px)}
.end-cta h2{max-width:620px;color:#fff}
.end-cta p{max-width:560px;margin:0 0 30px;font-size:16px;color:rgba(245,243,238,.74)}
.end-cta .btn-ghost{border-color:rgba(245,243,238,.3);color:#F5F3EE}
.end-cta .btn-ghost:hover{border-color:#FF8A7C;color:#FF8A7C}
.end-cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:rgba(245,243,238,.72);padding:clamp(52px,6vw,76px) 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:clamp(28px,4vw,52px);padding-bottom:clamp(36px,4.4vw,56px);border-bottom:1px solid rgba(245,243,238,.14)}
.footer-brand .brand-text{color:#F5F3EE}
.footer-brand .brand-sub{color:rgba(245,243,238,.5)}
.footer-brand p{margin-top:18px;font-size:14px;line-height:1.85;color:rgba(245,243,238,.62);max-width:320px}
.footer-col h4{font-size:13px;font-weight:600;letter-spacing:.12em;color:rgba(245,243,238,.5);margin-bottom:18px;text-transform:uppercase;font-family:var(--font-num)}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14.2px;color:rgba(245,243,238,.74);transition:color .2s ease}
.footer-col a:hover{color:#FF8A7C}
.footer-contact li{font-size:14px;line-height:1.8;color:rgba(245,243,238,.7)}
.footer-contact strong{display:block;font-size:12px;letter-spacing:.08em;color:rgba(245,243,238,.44);font-weight:500;margin-bottom:3px}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:22px 0 28px;font-size:12.8px;letter-spacing:.03em;color:rgba(245,243,238,.44)}

/* ---------- 浮动 CTA ---------- */
.float-cta{position:fixed;right:24px;bottom:24px;z-index:110;display:flex;align-items:center;gap:10px;opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s ease,transform .3s ease,visibility .3s ease}
.float-cta.is-visible{opacity:1;visibility:visible;transform:none}
.float-cta .btn{box-shadow:0 10px 26px -10px rgba(222,58,43,.6)}
.to-top{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;border:1px solid var(--c-line);background:#fff;color:var(--c-ink);box-shadow:var(--shadow-1);transition:border-color .2s ease,color .2s ease,transform .2s ease}
.to-top:hover{border-color:var(--c-accent);color:var(--c-accent);transform:translateY(-2px)}

/* ---------- 滚动动效 ---------- */
[data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .42s cubic-bezier(.2,.7,.3,1),transform .42s cubic-bezier(.2,.7,.3,1)}
[data-reveal].is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1.25fr 1fr}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .faq-layout{grid-template-columns:1fr;gap:32px}
  .faq-aside{position:static}
  .demo-grid{grid-template-columns:1fr}
  .proof-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .main-nav{position:fixed;top:0;right:0;bottom:0;left:auto;width:min(320px,86vw);flex-direction:column;align-items:stretch;justify-content:flex-start;gap:4px;padding:88px 20px 32px;background:var(--c-bg);border-left:1px solid var(--c-line);box-shadow:-14px 0 44px rgba(21,23,27,.16);transform:translateX(103%);transition:transform .32s cubic-bezier(.2,.7,.3,1);z-index:130;overflow-y:auto}
  .main-nav.is-open{transform:none}
  .nav-link{width:100%;padding:13px 14px;font-size:15.5px;border-radius:10px}
  .nav-link.is-active::after{left:14px;right:auto;width:16px;bottom:50%;margin-bottom:-1px}
  .nav-toggle{display:inline-flex}
  .command-search{display:none}
  .hero{padding-top:112px}
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{aspect-ratio:16/10;order:-1}
  .sell-row{grid-template-columns:1fr}
  .sell-row:nth-child(even) .sell-text,
  .sell-row:nth-child(even) .sell-media{order:0}
  .plan-grid{grid-template-columns:1fr}
}
@media (max-width:768px){
  .wrap{padding:0 20px}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .proof-nums{grid-template-columns:1fr}
  .nav-wrap{gap:12px}
  .brand-sub{display:none}
  .nav-tools .btn-sm{display:none}
  .float-cta{left:16px;right:16px;bottom:14px;padding-bottom:env(safe-area-inset-bottom)}
  .float-cta .btn{flex:1 1 auto}
  .to-top{display:none}
  .end-cta{border-radius:14px}
  .news-head{align-items:flex-start}
}
@media (max-width:520px){
  h2{font-size:26px}
  .hero h1{font-size:31px}
  .hero-actions .btn{width:100%}
  .hero-stats .stat{padding:16px 16px}
  .news-grid{grid-template-columns:1fr}
  .plan{padding:24px 22px 26px}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .faq-a p{padding-right:12px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}
  [data-reveal]{opacity:1;transform:none}
}

/* roulang page: article */
:root{
  --c-bg:#F5F3EE;
  --c-bg-soft:#F0EDE5;
  --c-paper:#FFFFFF;
  --c-ink:#15171B;
  --c-ink-2:#5A5F66;
  --c-muted:#6B6F76;
  --c-line:#E3DFD6;
  --c-accent:#DE3A2B;
  --c-accent-d:#C9301F;
  --c-teal:#0FA98E;
  --r-card:14px;
  --r-frame:18px;
  --r-btn:10px;
  --space-section:clamp(72px,9vw,140px);
  --shadow-1:0 1px 2px rgba(21,23,27,.06);
  --shadow-2:0 12px 32px -12px rgba(21,23,27,.16);
  --font-cn:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-num:"Inter","Noto Sans SC",system-ui,sans-serif;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:var(--font-cn);
  font-size:16px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0}
ul,ol{list-style:none;margin:0;padding:0}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease)}
a:hover{color:var(--c-accent)}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input{font:inherit}
h1,h2,h3,h4,h5,h6{font-family:var(--font-cn);color:var(--c-ink);margin:0;line-height:1.3}
p{margin:0}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px;border-radius:4px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding-top:var(--space-section);padding-bottom:var(--space-section)}
[data-anchor]{scroll-margin-top:96px}

/* ---------- header / nav ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:60;
  background:rgba(245,243,238,.94);
  -webkit-backdrop-filter:saturate(160%) blur(10px);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.is-scrolled{background:rgba(245,243,238,.98);border-bottom-color:var(--c-line);box-shadow:var(--shadow-1)}
.nav-wrap{display:flex;align-items:center;gap:clamp(10px,1.6vw,28px);height:68px;transition:height .25s var(--ease)}
.site-header.is-scrolled .nav-wrap{height:56px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{width:22px;height:22px;border-radius:7px;background:var(--c-accent);box-shadow:inset 0 0 0 3px rgba(255,255,255,.3);flex:0 0 auto}
.brand-text{font-family:var(--font-cn);font-weight:800;font-size:17px;letter-spacing:-.01em;white-space:nowrap}
.brand-sub{font-size:11.5px;font-weight:600;color:var(--c-muted);letter-spacing:.12em;margin-left:6px;vertical-align:2px}
.main-nav{display:flex;align-items:center;gap:clamp(2px,.8vw,10px);flex:1 1 auto;min-width:0}
.nav-link{position:relative;padding:8px 10px;font-size:14.5px;color:var(--c-ink-2);border-radius:8px;white-space:nowrap;transition:color .2s var(--ease),background .2s var(--ease)}
.nav-link:hover{color:var(--c-ink);background:rgba(21,23,27,.05)}
.nav-link.is-active{color:var(--c-ink);font-weight:600}
.nav-link.is-active::after{content:"";position:absolute;left:10px;right:10px;bottom:1px;height:2px;border-radius:2px;background:var(--c-accent)}
.nav-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto}
.command-search{
  display:flex;align-items:center;gap:8px;height:40px;width:220px;padding:0 10px 0 12px;
  background:var(--c-paper);border:1px solid var(--c-line);border-radius:10px;
  transition:width .25s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.command-search:hover{border-color:#CFC9BC}
.command-search:focus-within{width:248px;border-color:var(--c-accent);box-shadow:0 0 0 2px rgba(222,58,43,.18)}
.cs-icon{display:inline-flex;color:var(--c-muted);flex:0 0 auto}
.command-search input{flex:1 1 auto;min-width:0;border:0;outline:0;background:transparent;font-size:13.5px;color:var(--c-ink);height:100%}
.command-search input::placeholder{color:#9A9C9F}
.kbd{flex:0 0 auto;font-family:var(--font-num);font-size:11px;color:var(--c-muted);border:1px solid var(--c-line);border-radius:5px;padding:1px 5px;background:#FAF9F6}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:44px;padding:0 20px;
  border:1px solid transparent;border-radius:var(--r-btn);font-size:15px;font-weight:600;letter-spacing:.01em;
  white-space:nowrap;transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--c-accent);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--c-accent-d);color:#fff;box-shadow:var(--shadow-2);transform:translateY(-1px)}
.btn-primary .arrow{transition:transform .2s var(--ease)}
.btn-primary:hover .arrow{transform:translateX(3px)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--c-line);color:var(--c-ink)}
.btn-ghost:hover{border-color:var(--c-accent);color:var(--c-accent);background:rgba(222,58,43,.04)}
.btn-light{background:#fff;color:var(--c-ink);border-color:rgba(255,255,255,.24)}
.btn-light:hover{background:#fff;color:var(--c-accent);border-color:#fff}
.btn-sm{height:36px;padding:0 14px;font-size:13.5px;border-radius:9px}
.nav-toggle{display:none;align-items:center;justify-content:center;width:38px;height:38px;border:1px solid var(--c-line);border-radius:9px;background:var(--c-paper);color:var(--c-ink)}
.nav-toggle:hover{border-color:var(--c-accent);color:var(--c-accent)}

/* ---------- article head ---------- */
.article-main{padding-top:68px;display:block}
.article-hero{padding:clamp(30px,4.6vw,58px) 0 clamp(24px,3vw,36px);border-bottom:1px solid var(--c-line)}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-muted);letter-spacing:.03em;margin-bottom:22px}
.breadcrumb a{color:var(--c-ink-2)}
.breadcrumb a:hover{color:var(--c-accent)}
.breadcrumb .sep{color:#BDB8AC}
.breadcrumb .current{color:var(--c-ink);max-width:58ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-title{
  font-family:var(--font-cn);font-weight:800;letter-spacing:-.02em;line-height:1.18;
  font-size:clamp(28px,4.2vw,52px);max-width:22em;margin:14px 0 22px;color:var(--c-ink);
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:13px;color:var(--c-muted);letter-spacing:.04em}
.post-cat{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;background:rgba(222,58,43,.09);color:var(--c-accent);font-size:12.5px;font-weight:600;letter-spacing:.04em}
.meta-dot{width:4px;height:4px;border-radius:50%;background:#C9C3B6}
.meta-item{display:inline-flex;align-items:center;gap:6px}
.meta-item strong{font-weight:600;color:var(--c-ink-2)}

/* ---------- article body ---------- */
.article-shell{padding:clamp(36px,5vw,64px) 0 clamp(48px,6vw,84px)}
.article-cover{
  max-width:1000px;margin:0 auto clamp(30px,4vw,48px);border-radius:var(--r-frame);overflow:hidden;
  border:1px solid var(--c-line);background:#EDEAE2;aspect-ratio:21/9;
}
.article-cover img{width:100%;height:100%;object-fit:cover}
.prose{
  max-width:760px;margin:0 auto;padding-left:34px;border-left:1px solid var(--c-line);
  font-size:17.5px;line-height:1.92;letter-spacing:.01em;color:#23262C;
}
.prose > *:first-child{margin-top:0}
.prose p{margin:0 0 22px;color:#23262C}
.prose h2{
  font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.35;letter-spacing:-.01em;
  margin:52px 0 18px;padding-top:6px;color:var(--c-ink);
}
.prose h2::before{content:"";display:block;width:38px;height:3px;border-radius:3px;background:var(--c-accent);margin-bottom:16px}
.prose h3{font-size:20px;font-weight:600;line-height:1.45;margin:36px 0 14px;color:var(--c-ink)}
.prose h4{font-size:17px;font-weight:600;margin:28px 0 12px;color:var(--c-ink)}
.prose ul,.prose ol{margin:0 0 24px;padding-left:22px}
.prose ul li{position:relative;list-style:none;margin-bottom:10px;padding-left:18px}
.prose ul li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
.prose ol{list-style:decimal}
.prose ol li{margin-bottom:10px;padding-left:4px}
.prose ol li::marker{color:var(--c-accent);font-weight:600}
.prose blockquote{
  margin:30px 0;padding:20px 24px;border-left:3px solid var(--c-accent);background:var(--c-bg-soft);
  border-radius:0 var(--r-card) var(--r-card) 0;color:var(--c-ink-2);font-size:16.5px;line-height:1.85;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:var(--r-card);margin:28px 0;border:1px solid var(--c-line);height:auto}
.prose figure{margin:28px 0}
.prose figcaption{font-size:13px;color:var(--c-muted);text-align:center;margin-top:10px;letter-spacing:.03em}
.prose a{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.prose a:hover{color:var(--c-accent-d)}
.prose strong{font-weight:700;color:var(--c-ink)}
.prose hr{border:0;border-top:1px solid var(--c-line);margin:38px 0}
.prose table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15.5px}
.prose th,.prose td{border:1px solid var(--c-line);padding:11px 14px;text-align:left}
.prose th{background:var(--c-bg-soft);font-weight:600}
.prose code{font-family:var(--font-num);font-size:14px;background:var(--c-bg-soft);border:1px solid var(--c-line);border-radius:6px;padding:1px 6px}
.article-empty{
  max-width:760px;margin:0 auto;text-align:center;padding:56px 28px;background:var(--c-paper);
  border:1px dashed #D4CEC1;border-radius:var(--r-frame);
}
.article-empty h2{font-size:22px;font-weight:700;margin-bottom:10px}
.article-empty p{color:var(--c-muted);font-size:15px;margin-bottom:22px}

/* ---------- notice strip ---------- */
.notice-strip{border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);background:var(--c-bg-soft);padding:26px 0}
.notice-inner{display:flex;flex-wrap:wrap;align-items:center;gap:14px 26px;font-size:13.5px;color:var(--c-muted);letter-spacing:.02em}
.notice-inner .tag{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;background:rgba(15,169,142,.12);color:#0B7C69;font-size:12px;font-weight:600;letter-spacing:.05em}
.notice-inner span.line{flex:1 1 240px;height:1px;background:var(--c-line)}

/* ---------- related ---------- */
.related{padding:clamp(48px,6vw,88px) 0;background:var(--c-bg-soft);border-top:1px solid var(--c-line)}
.sec-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px 32px;margin-bottom:clamp(24px,3vw,38px)}
.sec-title{font-size:clamp(22px,2.6vw,32px);font-weight:700;letter-spacing:-.01em;line-height:1.3}
.sec-desc{font-size:14px;color:var(--c-muted);max-width:44ch;margin-top:8px;line-height:1.8}
.link-more{display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--c-ink);border-bottom:1px solid var(--c-line);padding-bottom:3px}
.link-more:hover{color:var(--c-accent);border-color:var(--c-accent)}
.link-more .arrow{transition:transform .2s var(--ease)}
.link-more:hover .arrow{transform:translateX(3px)}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.related-card{
  display:flex;flex-direction:column;background:var(--c-paper);border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;
  transition:transform .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.related-card:hover{transform:translateY(-2px);border-color:var(--c-accent);box-shadow:var(--shadow-2)}
.related-thumb{aspect-ratio:16/9;overflow:hidden;background:#EDEAE2}
.related-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease)}
.related-card:hover .related-thumb img{transform:scale(1.04)}
.related-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.related-kicker{font-family:var(--font-num);font-size:11.5px;letter-spacing:.12em;font-weight:600;color:var(--c-teal);text-transform:uppercase}
.related-title{font-size:17px;font-weight:700;line-height:1.45;color:var(--c-ink)}
.related-text{font-size:14px;color:var(--c-muted);line-height:1.8;flex:1 1 auto}
.related-foot{display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:#8A8D92;letter-spacing:.04em;margin-top:4px}

/* ---------- back + end cta ---------- */
.back-row{padding:clamp(28px,4vw,48px) 0;border-top:1px solid var(--c-line)}
.back-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px 28px}
.back-note{font-size:13.5px;color:var(--c-muted);letter-spacing:.02em}
.end-cta{background:var(--c-ink);color:#F2F0EA;padding:clamp(56px,7vw,96px) 0}
.end-cta .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px 48px}
.end-cta h2{font-size:clamp(24px,3vw,38px);font-weight:800;letter-spacing:-.02em;line-height:1.25;color:#fff;max-width:16em}
.end-cta p{margin-top:14px;font-size:15px;line-height:1.85;color:rgba(242,240,234,.72);max-width:38em}
.end-cta .cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{background:var(--c-ink);color:rgba(242,240,234,.74);padding:clamp(48px,6vw,76px) 0 28px;border-top:1px solid rgba(255,255,255,.08)}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:clamp(24px,3vw,48px)}
.footer-brand .brand-text{color:#fff}
.footer-brand .brand-sub{color:rgba(242,240,234,.5)}
.footer-brand p{margin-top:16px;font-size:13.5px;line-height:1.9;color:rgba(242,240,234,.62);max-width:34ch}
.footer-col h4{font-size:13px;font-weight:600;letter-spacing:.1em;color:#fff;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:13.5px;color:rgba(242,240,234,.66)}
.footer-col ul li a:hover{color:#fff}
.footer-contact li{font-size:13.5px;line-height:1.8;color:rgba(242,240,234,.62);margin-bottom:12px}
.footer-contact li strong{display:block;font-size:12px;font-weight:600;letter-spacing:.08em;color:rgba(242,240,234,.42);margin-bottom:3px}
.footer-bottom{margin-top:clamp(32px,4vw,52px);padding-top:22px;border-top:1px solid rgba(255,255,255,.1);display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 24px;font-size:12.5px;color:rgba(242,240,234,.46);letter-spacing:.03em}

/* ---------- float cta ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:50;display:flex;align-items:center;gap:10px;
  opacity:0;transform:translateY(12px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.float-cta.is-visible{opacity:1;transform:none;pointer-events:auto}
.float-cta .btn{border-radius:999px;height:46px;padding:0 20px;box-shadow:var(--shadow-2)}
.float-top{
  display:inline-flex;align-items:center;justify-content:center;width:46px;height:46px;border-radius:999px;
  background:var(--c-paper);border:1px solid var(--c-line);color:var(--c-ink);box-shadow:var(--shadow-1);
  transition:border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.float-top:hover{border-color:var(--c-accent);color:var(--c-accent);transform:translateY(-2px)}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media screen and (max-width:1100px){
  .command-search{width:170px}
  .command-search:focus-within{width:200px}
  .nav-link{padding:8px 6px;font-size:14px}
}
@media screen and (max-width:1024px){
  .nav-wrap{height:60px;gap:12px}
  .site-header.is-scrolled .nav-wrap{height:60px}
  .article-main{padding-top:60px}
  .nav-toggle{display:inline-flex}
  .main-nav{
    position:fixed;top:60px;left:0;right:0;z-index:55;display:none;flex-direction:column;align-items:stretch;
    gap:2px;padding:12px 20px 20px;background:var(--c-bg);border-bottom:1px solid var(--c-line);box-shadow:var(--shadow-2);
  }
  .main-nav.is-open{display:flex}
  .main-nav .nav-link{padding:13px 12px;font-size:15px;border-radius:9px}
  .main-nav .nav-link.is-active{background:rgba(222,58,43,.07)}
  .nav-link.is-active::after{display:none}
  .command-search{width:150px}
  .command-search:focus-within{width:170px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media screen and (max-width:768px){
  .wrap{padding:0 20px}
  .command-search{display:none}
  .nav-tools .btn-sm{display:none}
  .article-title{max-width:none}
  .prose{padding-left:0;border-left:0;font-size:17px}
  .article-cover{aspect-ratio:16/9;border-radius:var(--r-card)}
  .related-grid{grid-template-columns:1fr}
  .end-cta .wrap{flex-direction:column;align-items:flex-start}
  .breadcrumb .current{max-width:34ch}
  .float-cta{right:16px;left:16px;bottom:calc(14px + env(safe-area-inset-bottom,0px));justify-content:space-between}
  .float-cta .btn{flex:1 1 auto;justify-content:center}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media screen and (max-width:520px){
  .brand-text{font-size:15.5px}
  .brand-sub{font-size:11px;letter-spacing:.08em}
  .article-title{font-size:clamp(24px,7vw,32px)}
  .article-meta{gap:8px 12px;font-size:12.5px}
  .back-inner{flex-direction:column;align-items:flex-start}
  .end-cta .cta-actions{width:100%}
  .end-cta .cta-actions .btn{flex:1 1 auto;justify-content:center}
  .prose{font-size:16.5px}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}

/* roulang page: category1 */
:root{
  --c-bg:#F5F3EE;
  --c-paper:#FFFFFF;
  --c-ink:#15171B;
  --c-ink-2:#5A5F66;
  --c-muted:#6B6F76;
  --c-line:#E3DFD6;
  --c-accent:#DE3A2B;
  --c-accent-deep:#C22F21;
  --c-cool:#0FA98E;
  --r-card:14px;
  --r-img:18px;
  --r-btn:10px;
  --r-pill:999px;
  --space-section:clamp(72px,9vw,140px);
  --shadow-1:0 1px 2px rgba(21,23,27,.06);
  --shadow-2:0 12px 32px -12px rgba(21,23,27,.16);
  --font-sans:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Helvetica Neue",Arial,sans-serif;
  --nav-h:68px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  padding-top:var(--nav-h);
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.9;
  letter-spacing:.01em;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
body,button,input,select,textarea{font-family:var(--font-sans);}
h1,h2,h3,h4,h5,h6,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:0;list-style:none;}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,background-color .2s ease;}
a:hover,a:focus{color:var(--c-accent);}
img{max-width:100%;display:block;height:auto;border-radius:0;}
button{background:none;border:0;cursor:pointer;color:inherit;padding:0;}
input[type="search"]{-webkit-appearance:none;appearance:none;}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px;}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px;width:100%;}
section[id]{scroll-margin-top:96px;}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  background:rgba(245,243,238,.94);
  backdrop-filter:saturate(160%) blur(8px);
  -webkit-backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .28s ease,background-color .28s ease;
}
.site-header.is-scrolled{box-shadow:0 1px 2px rgba(21,23,27,.08);background:rgba(245,243,238,.98);}
.nav-wrap{display:flex;align-items:center;gap:22px;height:var(--nav-h);transition:height .28s ease;}
.site-header.is-scrolled .nav-wrap{height:56px;}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;font-weight:800;letter-spacing:-.01em;}
.brand-mark{width:14px;height:14px;border-radius:4px;background:var(--c-accent);box-shadow:0 0 0 3px rgba(222,58,43,.14);}
.brand-text{display:inline-flex;align-items:baseline;gap:6px;font-size:17px;line-height:1;color:var(--c-ink);white-space:nowrap;}
.brand-sub{font-size:12.5px;font-weight:500;color:var(--c-muted);letter-spacing:.06em;}
.brand:hover .brand-sub{color:var(--c-accent);}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:8px;flex:1 1 auto;}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:14.5px;
  font-weight:500;
  color:var(--c-ink-2);
  border-radius:8px;
  white-space:nowrap;
}
.nav-link:hover{color:var(--c-ink);background:rgba(21,23,27,.05);}
.nav-link.is-active{color:var(--c-accent);font-weight:600;}
.nav-link.is-active::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  border-radius:2px;background:var(--c-accent);
}
.nav-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.command-search{
  display:flex;align-items:center;gap:8px;
  height:40px;padding:0 10px 0 12px;
  border:1px solid var(--c-line);
  border-radius:var(--r-pill);
  background:var(--c-paper);
  transition:border-color .2s ease,box-shadow .2s ease,width .2s ease;
  width:236px;
}
.command-search:focus-within{border-color:var(--c-accent);box-shadow:0 0 0 2px rgba(222,58,43,.18);width:262px;}
.cs-icon{color:var(--c-muted);display:inline-flex;flex:0 0 auto;}
.command-search input{
  flex:1 1 auto;min-width:0;height:38px;border:0;background:transparent;
  font-size:13.5px;color:var(--c-ink);outline:none;margin:0;
}
.command-search input::placeholder{color:#9A9E A4;color:#9A9EA4;}
.kbd{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:30px;height:22px;padding:0 6px;
  font-size:11px;font-weight:600;color:var(--c-muted);
  border:1px solid var(--c-line);border-radius:6px;background:#FAF8F4;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;
  font-size:15px;font-weight:600;line-height:1.2;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  transition:background-color .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
  cursor:pointer;
}
.btn .arrow{transition:transform .22s ease;}
.btn:hover .arrow{transform:translateX(3px);}
.btn-primary{background:var(--c-accent);color:#fff;box-shadow:var(--shadow-1);}
.btn-primary:hover,.btn-primary:focus{background:var(--c-accent-deep);color:#fff;box-shadow:var(--shadow-2);}
.btn-ghost{background:transparent;color:var(--c-ink);border-color:var(--c-line);}
.btn-ghost:hover,.btn-ghost:focus{color:var(--c-accent);border-color:var(--c-accent);background:rgba(222,58,43,.05);}
.btn-sm{padding:9px 16px;font-size:13.8px;}
.btn-on-dark{background:#fff;color:var(--c-ink);}
.btn-on-dark:hover{background:#F2EFE8;color:var(--c-ink);}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.42);}
.btn-outline-light:hover{background:rgba(255,255,255,.12);color:#fff;border-color:#fff;}
.nav-toggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;border:1px solid var(--c-line);border-radius:10px;background:var(--c-paper);color:var(--c-ink);}

/* ---------- breadcrumb ---------- */
.crumb-bar{padding:22px 0 0;}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;letter-spacing:.04em;color:var(--c-muted);}
.crumb a{color:var(--c-muted);}
.crumb a:hover{color:var(--c-accent);}
.crumb .sep{color:#C4BFB4;}
.crumb .now{color:var(--c-ink);font-weight:600;}

/* ---------- page hero ---------- */
.page-hero{padding:clamp(28px,4vw,48px) 0 clamp(36px,5vw,64px);}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.18fr) minmax(0,.82fr);gap:clamp(28px,4vw,56px);align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.14em;color:var(--c-accent);
  text-transform:uppercase;margin-bottom:18px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--c-accent);border-radius:2px;}
h1{
  font-size:clamp(34px,4.8vw,62px);
  font-weight:800;line-height:1.08;letter-spacing:-.02em;
  margin:0 0 20px;color:var(--c-ink);
}
h1 .h1-sub{display:block;font-size:clamp(17px,1.7vw,22px);font-weight:600;color:var(--c-muted);letter-spacing:.02em;margin-top:14px;}
.hero-lead{font-size:clamp(16px,1.5vw,18.5px);line-height:1.9;color:var(--c-ink-2);max-width:36em;}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0 28px;}
.tag{
  display:inline-flex;align-items:center;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;letter-spacing:.03em;
  background:rgba(21,23,27,.05);color:var(--c-ink-2);
  border:1px solid transparent;
}
.tag-accent{background:rgba(222,58,43,.10);color:var(--c-accent);}
.tag-cool{background:rgba(15,169,142,.12);color:#0B7F6B;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;aspect-ratio:16/11;object-fit:cover;
  border-radius:var(--r-img);border:1px solid var(--c-line);
  box-shadow:var(--shadow-1);
  background:#EDE9E1;
}
.media-badge{
  position:absolute;left:16px;bottom:16px;
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:var(--r-pill);
  background:rgba(21,23,27,.82);color:#fff;
  font-size:12.5px;font-weight:600;letter-spacing:.04em;
  backdrop-filter:blur(4px);
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--c-cool);box-shadow:0 0 0 3px rgba(15,169,142,.22);}

/* ---------- stats strip ---------- */
.stats-strip{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);
  margin-top:clamp(32px,4vw,52px);
}
.stat{padding:22px 24px;border-left:1px solid var(--c-line);}
.stat:first-child{border-left:0;padding-left:0;}
.stat-num{font-size:clamp(24px,2.6vw,32px);font-weight:800;letter-spacing:-.02em;color:var(--c-ink);line-height:1.2;}
.stat-num span{font-size:13px;font-weight:600;color:var(--c-muted);margin-left:6px;letter-spacing:.04em;}
.stat-label{font-size:13.5px;color:var(--c-muted);margin-top:4px;letter-spacing:.03em;}

/* ---------- section base ---------- */
.section{padding:var(--space-section) 0 0;}
.section-head{margin-bottom:clamp(28px,3.6vw,44px);}
h2.sec-title{
  font-size:clamp(24px,3vw,38px);font-weight:700;line-height:1.24;
  letter-spacing:-.015em;color:var(--c-ink);
}
h2.sec-title .sep{color:var(--c-accent);margin:0 10px;font-weight:500;}
.sec-desc{margin-top:14px;color:var(--c-ink-2);font-size:16px;max-width:44em;}

/* ---------- intro two column ---------- */
.lead-grid{display:grid;grid-template-columns:minmax(0,.72fr) minmax(0,1.28fr);gap:clamp(24px,4vw,56px);align-items:start;}
.lead-title{
  font-size:clamp(22px,2.4vw,30px);font-weight:700;line-height:1.32;letter-spacing:-.01em;
  padding-top:6px;border-top:2px solid var(--c-ink);display:inline-block;
}
.lead-body p{color:var(--c-ink-2);font-size:16.5px;line-height:1.95;margin-bottom:16px;}
.lead-body p:last-child{margin-bottom:0;}
.lead-list{margin-top:22px;display:grid;gap:12px;}
.lead-list li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:var(--c-ink);line-height:1.75;}
.lead-list .li-mark{
  flex:0 0 auto;width:20px;height:20px;border-radius:50%;
  border:1px solid var(--c-accent);color:var(--c-accent);
  font-size:11px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;
  margin-top:4px;font-family:var(--font-sans);
}

/* ---------- entry list ---------- */
.entry-list{border-top:1px solid var(--c-line);}
.entry{
  display:grid;grid-template-columns:112px minmax(0,1fr);gap:clamp(16px,2.4vw,32px);
  padding:clamp(26px,3.4vw,42px) 0;
  border-bottom:1px solid var(--c-line);
  transition:border-color .28s ease,background-color .28s ease,transform .28s ease;
}
.entry:hover{border-bottom-color:var(--c-accent);}
.entry:hover .entry-num{color:var(--c-ink);}
.entry-num{
  font-family:"Inter",var(--font-sans);
  font-size:clamp(26px,3vw,36px);font-weight:800;letter-spacing:-.03em;
  color:var(--c-accent);line-height:1;transition:color .28s ease;padding-top:4px;
}
.entry-body h3{font-size:clamp(19px,2vw,23px);font-weight:700;letter-spacing:-.01em;line-height:1.4;margin-bottom:10px;}
.entry-body p{color:var(--c-ink-2);font-size:16px;line-height:1.95;max-width:56em;}
.entry-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.entry-figure{margin-top:18px;max-width:520px;}
.entry-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-card);border:1px solid var(--c-line);}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,2.6vw,32px);}
.step{padding-top:22px;border-top:1px solid var(--c-line);position:relative;}
.step-index{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:50%;
  background:var(--c-ink);color:#fff;font-size:13.5px;font-weight:700;
  margin-bottom:16px;letter-spacing:.02em;
}
.step h3{font-size:18.5px;font-weight:700;margin-bottom:8px;line-height:1.45;}
.step p{color:var(--c-ink-2);font-size:15px;line-height:1.9;}

/* ---------- split figure block ---------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(24px,4vw,56px);align-items:center;}
.split img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);border:1px solid var(--c-line);box-shadow:var(--shadow-1);}
.split h3{font-size:clamp(21px,2.3vw,28px);font-weight:700;line-height:1.36;letter-spacing:-.01em;margin-bottom:14px;}
.split p{color:var(--c-ink-2);font-size:16px;line-height:1.95;margin-bottom:14px;}
.mini-facts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:22px;}
.mini-fact{background:var(--c-paper);border:1px solid var(--c-line);border-radius:var(--r-card);padding:16px 18px;box-shadow:var(--shadow-1);}
.mini-fact strong{display:block;font-size:19px;font-weight:800;letter-spacing:-.01em;}
.mini-fact span{font-size:13px;color:var(--c-muted);letter-spacing:.03em;}

/* ---------- FAQ ---------- */
.faq-layout{display:grid;grid-template-columns:minmax(0,.62fr) minmax(0,1.38fr);gap:clamp(24px,4vw,56px);align-items:start;}
.faq-aside{position:sticky;top:96px;}
.faq-aside h2{font-size:clamp(22px,2.5vw,32px);font-weight:700;line-height:1.32;letter-spacing:-.015em;}
.faq-aside p{color:var(--c-ink-2);font-size:15px;line-height:1.9;margin-top:12px;max-width:22em;}
.faq-list{border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 4px 22px 0;text-align:left;
  font-size:16.5px;font-weight:600;line-height:1.6;color:var(--c-ink);
  transition:color .2s ease;
}
.faq-q:hover{color:var(--c-accent);}
.faq-ico{
  flex:0 0 auto;width:22px;height:22px;position:relative;
  border:1px solid var(--c-line);border-radius:50%;
  transition:transform .3s ease,border-color .2s ease,background-color .2s ease;
}
.faq-ico::before,.faq-ico::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-ink-2);
  transform:translate(-50%,-50%);border-radius:2px;transition:background-color .2s ease;
}
.faq-ico::before{width:9px;height:1.5px;}
.faq-ico::after{width:1.5px;height:9px;}
.faq-item.is-open .faq-ico{transform:rotate(180deg);border-color:var(--c-accent);background:rgba(222,58,43,.08);}
.faq-item.is-open .faq-ico::before,.faq-item.is-open .faq-ico::after{background:var(--c-accent);}
.faq-item.is-open .faq-q{color:var(--c-accent);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s cubic-bezier(.2,.7,.3,1);}
.faq-a p{padding:0 40px 24px 0;color:var(--c-ink-2);font-size:15.5px;line-height:1.92;}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--c-ink);color:#fff;border-radius:22px;
  padding:clamp(34px,5vw,66px);
  display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr);
  gap:clamp(24px,4vw,48px);align-items:center;
  position:relative;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;right:-90px;bottom:-120px;width:340px;height:340px;
  border-radius:50%;background:radial-gradient(circle,rgba(222,58,43,.34),rgba(222,58,43,0) 68%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(24px,3vw,38px);font-weight:700;line-height:1.26;letter-spacing:-.015em;color:#fff;}
.cta-band p{margin-top:14px;color:rgba(255,255,255,.72);font-size:16px;line-height:1.9;max-width:34em;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;position:relative;z-index:1;}

/* ---------- footer ---------- */
.site-footer{margin-top:var(--space-section);background:var(--c-ink);color:rgba(255,255,255,.74);}
.footer-grid{
  display:grid;grid-template-columns:1.5fr .8fr .8fr 1.1fr;gap:clamp(24px,3.4vw,44px);
  padding:clamp(48px,6vw,76px) 0 40px;
  border-bottom:1px solid rgba(255,255,255,.10);
}
.site-footer .brand-text{color:#fff;}
.site-footer .brand-sub{color:rgba(255,255,255,.55);}
.site-footer .brand:hover .brand-sub{color:#fff;}
.footer-brand p{margin-top:16px;font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.62);max-width:30em;}
.footer-col h4{font-size:13px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:#fff;margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col a{font-size:14.5px;color:rgba(255,255,255,.66);}
.footer-col a:hover{color:#fff;}
.footer-contact li{font-size:14px;color:rgba(255,255,255,.62);line-height:1.8;}
.footer-contact strong{display:block;font-size:12px;letter-spacing:.08em;color:rgba(255,255,255,.42);font-weight:600;margin-bottom:2px;}
.footer-bottom{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;padding:22px 0 28px;font-size:13px;color:rgba(255,255,255,.46);letter-spacing:.02em;}

/* ---------- float CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:110;
  display:flex;align-items:center;gap:10px;
  opacity:0;transform:translateY(10px);pointer-events:none;
  transition:opacity .3s ease,transform .3s ease;
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto;}
.float-cta .btn{padding:12px 20px;border-radius:var(--r-pill);box-shadow:var(--shadow-2);}
.back-top{
  width:44px;height:44px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c-paper);border:1px solid var(--c-line);color:var(--c-ink);
  box-shadow:var(--shadow-1);transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.back-top:hover{border-color:var(--c-accent);color:var(--c-accent);transform:translateY(-2px);}

/* ---------- reveal ---------- */
.js .reveal{opacity:0;transform:translateY(12px);}
.js .reveal.is-in{opacity:1;transform:none;transition:opacity .42s cubic-bezier(.2,.7,.3,1),transform .42s cubic-bezier(.2,.7,.3,1);}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .command-search{width:196px;}
  .command-search:focus-within{width:220px;}
  .footer-grid{grid-template-columns:1.4fr .8fr .8fr;row-gap:36px;}
  .footer-col:last-child{grid-column:1 / -1;}
  .footer-contact{grid-template-columns:repeat(3,minmax(0,1fr));display:grid;gap:16px;}
}
@media (max-width:1024px){
  .main-nav{gap:0;}
  .nav-link{padding:8px 9px;font-size:14px;}
  .hero-grid{grid-template-columns:minmax(0,1fr);gap:32px;}
  .hero-media{order:-1;}
  .hero-media img{aspect-ratio:16/8;}
  .command-search{display:none;}
  .lead-grid{grid-template-columns:minmax(0,1fr);gap:24px;}
  .split{grid-template-columns:minmax(0,1fr);}
  .split img{aspect-ratio:16/9;}
  .faq-layout{grid-template-columns:minmax(0,1fr);}
  .faq-aside{position:static;}
  .faq-aside p{max-width:none;}
  .cta-band{grid-template-columns:minmax(0,1fr);}
  .cta-actions{justify-content:flex-start;}
}
@media (max-width:768px){
  :root{--nav-h:60px;}
  body{font-size:16px;}
  .wrap{padding:0 20px;}
  .main-nav{
    position:fixed;top:var(--nav-h);left:0;right:0;
    display:none;flex-direction:column;align-items:stretch;gap:2px;
    background:var(--c-paper);
    border-bottom:1px solid var(--c-line);
    padding:14px 20px 20px;
    box-shadow:var(--shadow-2);
    max-height:calc(100vh - var(--nav-h));
    overflow-y:auto;
  }
  .main-nav.is-open{display:flex;}
  .nav-link{padding:13px 12px;font-size:15.5px;border-radius:10px;}
  .nav-link.is-active::after{left:12px;right:auto;width:22px;bottom:6px;}
  .nav-toggle{display:inline-flex;}
  .nav-tools .btn-sm{display:none;}
  .nav-wrap{gap:12px;justify-content:space-between;}
  .stats-strip{grid-template-columns:minmax(0,1fr);border-bottom:0;}
  .stat{border-left:0;border-bottom:1px solid var(--c-line);padding:16px 0;}
  .stat:last-child{border-bottom:0;}
  .entry{grid-template-columns:minmax(0,1fr);gap:10px;padding:26px 0;}
  .entry-num{font-size:22px;padding-top:0;}
  .steps{grid-template-columns:minmax(0,1fr);gap:20px;}
  .mini-facts{grid-template-columns:minmax(0,1fr);}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-contact{grid-template-columns:minmax(0,1fr);}
  .footer-bottom{flex-direction:column;}
  .float-cta{
    left:0;right:0;bottom:0;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    background:rgba(245,243,238,.96);
    border-top:1px solid var(--c-line);
    backdrop-filter:blur(8px);
    gap:8px;
  }
  .float-cta .btn{flex:1 1 auto;justify-content:center;border-radius:var(--r-btn);}
  .back-top{flex:0 0 auto;width:44px;height:44px;border-radius:var(--r-btn);}
  .faq-a p{padding-right:0;}
}
@media (max-width:480px){
  h1{font-size:clamp(28px,8vw,38px);}
  .hero-actions .btn{width:100%;}
  .tag{font-size:12px;padding:4px 10px;}
  .cta-actions .btn{width:100%;}
  .hero-media img{aspect-ratio:4/3;}
  .crumb{font-size:12px;}
  .brand-text{font-size:15.5px;}
  .brand-sub{font-size:11.5px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  .js .reveal{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --c-bg:#F5F3EE;
  --c-surface:#FFFFFF;
  --c-ink:#15171B;
  --c-ink-2:#5A5F66;
  --c-mute:#6B6F76;
  --c-accent:#DE3A2B;
  --c-accent-dark:#C22F22;
  --c-teal:#0FA98E;
  --c-line:#E3DFD6;
  --c-dark:#15171B;
  --r-card:14px;
  --r-lg:18px;
  --r-btn:10px;
  --sh-1:0 1px 2px rgba(21,23,27,.06);
  --sh-2:0 12px 32px -12px rgba(21,23,27,.16);
  --space-section:clamp(72px,9vw,140px);
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Inter",var(--font-sans);
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.9;
  letter-spacing:.01em;
  color:var(--c-ink);
  background:var(--c-bg);
  -webkit-font-smoothing:antialiased;
}

h1,h2,h3,h4,h5,h6{
  font-family:var(--font-sans);
  color:var(--c-ink);
  margin:0;
  line-height:1.25;
  letter-spacing:-.01em;
}

p{margin:0 0 1em;}
p:last-child{margin-bottom:0;}

a{color:var(--c-ink);text-decoration:none;transition:color .2s ease;}
a:hover{color:var(--c-accent);}

img{max-width:100%;display:block;height:auto;}

ul,ol{margin:0;padding:0;list-style:none;}

button{font-family:inherit;font-size:inherit;line-height:inherit;}

:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px;border-radius:4px;}

.wrap{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(245,243,238,.92);
  -webkit-backdrop-filter:saturate(180%) blur(8px);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid transparent;
  transition:background .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.site-header.is-scrolled{
  background:rgba(245,243,238,.97);
  border-bottom-color:var(--c-line);
  box-shadow:var(--sh-1);
}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:22px;
  height:68px;
  transition:height .25s ease;
}
.site-header.is-scrolled .nav-wrap{height:56px;}

.brand{
  display:inline-flex;
  align-items:center;
  gap:9px;
  flex-shrink:0;
  color:var(--c-ink);
}
.brand:hover{color:var(--c-ink);}
.brand-mark{
  width:15px;height:15px;
  border-radius:4px;
  background:var(--c-accent);
  display:inline-block;
  flex-shrink:0;
}
.brand-text{
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand-sub{
  font-size:12px;
  font-weight:500;
  color:var(--c-ink-2);
  margin-left:6px;
  letter-spacing:.02em;
}

.main-nav{
  display:flex;
  align-items:center;
  gap:2px;
  min-width:0;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:14.5px;
  font-weight:500;
  color:var(--c-ink-2);
  border-radius:8px;
  white-space:nowrap;
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--c-ink);background:rgba(255,255,255,.75);}
.nav-link.is-active{color:var(--c-ink);font-weight:700;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  border-radius:2px;
  background:var(--c-accent);
}

.nav-tools{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:auto;
  flex-shrink:0;
}

.command-search{
  display:flex;
  align-items:center;
  gap:7px;
  height:40px;
  width:236px;
  padding:0 10px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:10px;
  transition:border-color .2s ease,box-shadow .2s ease,width .25s ease;
}
.command-search:focus-within{
  border-color:var(--c-accent);
  box-shadow:0 0 0 3px rgba(222,58,43,.14);
  width:274px;
}
.cs-icon{display:inline-flex;color:var(--c-mute);flex-shrink:0;}
.command-search input{
  flex:1 1 auto;
  min-width:0;
  height:100%;
  border:0;
  background:transparent;
  box-shadow:none;
  margin:0;
  padding:0;
  font-size:13.5px;
  color:var(--c-ink);
  outline:none;
}
.command-search input::placeholder{color:#9A9E A4;color:#9A9EA4;}
.command-search input:focus{box-shadow:none;}
.kbd{
  font-family:var(--font-num);
  font-size:11px;
  line-height:1;
  color:var(--c-mute);
  border:1px solid var(--c-line);
  border-radius:4px;
  padding:3px 5px;
  flex-shrink:0;
  background:#FAF8F4;
}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:40px;height:40px;
  border:1px solid var(--c-line);
  border-radius:10px;
  background:var(--c-surface);
  color:var(--c-ink);
  cursor:pointer;
  padding:0;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--c-accent);color:var(--c-accent);}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  cursor:pointer;
  text-align:center;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.btn .arrow{transition:transform .22s ease;flex-shrink:0;}
.btn:hover .arrow{transform:translateX(3px);}
.btn:active{transform:translateY(1px);}

.btn-primary{background:var(--c-accent);color:#fff;box-shadow:var(--sh-1);}
.btn-primary:hover{background:var(--c-accent-dark);color:#fff;box-shadow:var(--sh-2);}
.btn-primary:active{background:var(--c-accent-dark);color:#fff;}

.btn-ghost{background:var(--c-surface);color:var(--c-ink);border-color:var(--c-line);}
.btn-ghost:hover{border-color:var(--c-accent);color:var(--c-accent);background:var(--c-surface);}

.btn-sm{height:40px;padding:0 16px;font-size:14px;border-radius:9px;}

/* ---------- 面包屑 ---------- */
.crumbs{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:13px;
  letter-spacing:.03em;
  color:var(--c-mute);
  padding-top:26px;
}
.crumbs a{color:var(--c-mute);}
.crumbs a:hover{color:var(--c-accent);}
.crumbs .sep{color:#C4BFB4;}
.crumbs .current{color:var(--c-ink);font-weight:600;}

/* ---------- Hero ---------- */
.page-hero{padding-bottom:clamp(28px,4vw,52px);}
.hero-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:clamp(28px,4.5vw,64px);
  align-items:center;
  padding-top:clamp(24px,3.5vw,44px);
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--c-ink-2);
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:999px;
  padding:6px 14px;
  margin-bottom:20px;
}
.eyebrow .dot{
  width:7px;height:7px;border-radius:50%;
  background:var(--c-teal);
  display:inline-block;
}
.page-hero h1{
  font-size:clamp(34px,4.6vw,58px);
  font-weight:800;
  line-height:1.08;
  letter-spacing:-.02em;
  margin-bottom:20px;
}
.page-hero h1 .hl{color:var(--c-accent);}
.hero-lede{
  font-size:17px;
  line-height:1.9;
  color:var(--c-ink-2);
  max-width:33em;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:28px;
}
.hero-media{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--c-line);
  box-shadow:var(--sh-2);
  background:#E8E4DB;
  aspect-ratio:4/3;
}
.hero-media img{
  width:100%;height:100%;
  object-fit:cover;
}
.hero-media::after{
  content:"";
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(21,23,27,0) 45%,rgba(21,23,27,.55) 100%);
  pointer-events:none;
}
.hero-media .media-tag{
  position:absolute;
  left:16px;bottom:16px;
  z-index:2;
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.04em;
  color:#fff;
  background:rgba(21,23,27,.62);
  border:1px solid rgba(255,255,255,.24);
  border-radius:999px;
  padding:6px 13px;
  -webkit-backdrop-filter:blur(4px);
  backdrop-filter:blur(4px);
}
.hero-media .media-tag i{
  width:6px;height:6px;border-radius:50%;
  background:var(--c-teal);
  display:inline-block;
}

/* ---------- 通用板块 ---------- */
.section{padding-top:var(--space-section);}
.section-head{
  max-width:720px;
  margin-bottom:clamp(28px,4vw,48px);
}
.section-head h2{
  font-size:clamp(26px,3.2vw,40px);
  font-weight:700;
  line-height:1.2;
  margin-bottom:14px;
}
.section-head .sub{
  font-size:16.5px;
  line-height:1.9;
  color:var(--c-ink-2);
}
.kicker{
  display:block;
  font-family:var(--font-num);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--c-accent);
  margin-bottom:12px;
}

/* ---------- 导语两栏 ---------- */
.intro-grid{
  display:grid;
  grid-template-columns:.62fr 1fr;
  gap:clamp(24px,4vw,64px);
  padding:clamp(28px,4vw,48px) 0;
  border-top:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
}
.intro-title{position:sticky;top:104px;align-self:start;}
.intro-title h2{
  font-size:clamp(24px,2.8vw,34px);
  font-weight:700;
  line-height:1.25;
}
.intro-title p{
  margin-top:12px;
  font-size:14px;
  letter-spacing:.03em;
  color:var(--c-mute);
}
.intro-body p{color:var(--c-ink-2);font-size:16.5px;line-height:1.95;}
.intro-body p strong{color:var(--c-ink);font-weight:600;}
.tag-row{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:22px;
}
.tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  font-weight:500;
  color:var(--c-ink-2);
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:999px;
  padding:5px 13px;
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.tag:hover{border-color:var(--c-accent);color:var(--c-accent);transform:translateY(-2px);}
.tag.is-live{color:var(--c-teal);border-color:rgba(15,169,142,.35);background:rgba(15,169,142,.06);}

/* ---------- 双列图文块 ---------- */
.feature-stack{
  display:flex;
  flex-direction:column;
  gap:clamp(48px,6vw,88px);
}
.feature-row{
  display:grid;
  grid-template-columns:1.02fr .98fr;
  gap:clamp(26px,4vw,64px);
  align-items:center;
}
.feature-row.is-reverse .feature-media{order:2;}
.feature-row.is-reverse .feature-copy{order:1;}
.feature-media{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--c-line);
  background:#E8E4DB;
  box-shadow:var(--sh-1);
  aspect-ratio:16/11;
  transition:box-shadow .3s ease,border-color .3s ease,transform .3s ease;
}
.feature-media img{width:100%;height:100%;object-fit:cover;}
.feature-media:hover{box-shadow:var(--sh-2);border-color:var(--c-accent);transform:translateY(-2px);}
.feature-media .badge{
  position:absolute;
  top:14px;left:14px;
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.04em;
  color:var(--c-ink);
  background:rgba(245,243,238,.94);
  border:1px solid var(--c-line);
  border-radius:999px;
  padding:5px 12px;
}
.feature-media .badge .sq{width:6px;height:6px;border-radius:2px;background:var(--c-accent);display:inline-block;}

.feature-copy .fnum{
  font-family:var(--font-num);
  font-size:clamp(34px,4vw,52px);
  font-weight:800;
  line-height:1;
  letter-spacing:-.03em;
  color:var(--c-accent);
  display:block;
  margin-bottom:14px;
}
.feature-copy h3{
  font-size:clamp(20px,2.2vw,25px);
  font-weight:700;
  margin-bottom:14px;
  letter-spacing:-.01em;
}
.feature-copy p{
  font-size:16px;
  line-height:1.95;
  color:var(--c-ink-2);
}
.point-list{
  margin-top:20px;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.point-list li{
  position:relative;
  padding-left:22px;
  font-size:15.5px;
  line-height:1.8;
  color:var(--c-ink-2);
}
.point-list li::before{
  content:"";
  position:absolute;
  left:4px;top:.72em;
  width:7px;height:7px;
  border-radius:2px;
  background:var(--c-accent);
  opacity:.85;
}
.point-list li strong{color:var(--c-ink);font-weight:600;}

/* ---------- 功能清单 ---------- */
.spec-wrap{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.spec-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
}
.spec-item{
  padding:26px 28px;
  border-bottom:1px solid var(--c-line);
  border-right:1px solid var(--c-line);
  transition:background .22s ease;
}
.spec-item:nth-child(2n){border-right:0;}
.spec-item:nth-last-child(-n+2){border-bottom:0;}
.spec-item:hover{background:#FBF9F5;}
.spec-item .spec-label{
  display:flex;
  align-items:center;
  gap:9px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--c-mute);
  margin-bottom:8px;
}
.spec-item .spec-label i{
  width:6px;height:6px;
  border-radius:50%;
  background:var(--c-accent);
  display:inline-block;
}
.spec-item h4{
  font-size:17.5px;
  font-weight:700;
  margin-bottom:8px;
}
.spec-item p{
  font-size:15px;
  line-height:1.85;
  color:var(--c-ink-2);
}

/* ---------- 深色口径区 ---------- */
.section-dark{
  background:var(--c-dark);
  color:#EDEAE3;
  margin-top:var(--space-section);
  padding:clamp(56px,7vw,96px) 0;
}
.section-dark h2{
  color:#fff;
  font-size:clamp(26px,3.2vw,38px);
  font-weight:700;
  margin-bottom:16px;
}
.section-dark .sub{
  color:#B7BABF;
  font-size:16.5px;
  line-height:1.95;
  max-width:640px;
}
.stats{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(20px,3vw,44px);
  margin-top:clamp(32px,4vw,52px);
  padding-top:clamp(28px,3.5vw,44px);
  border-top:1px solid rgba(255,255,255,.14);
}
.stat .num{
  font-family:var(--font-num);
  font-size:clamp(38px,4.6vw,58px);
  font-weight:800;
  line-height:1;
  letter-spacing:-.03em;
  color:#fff;
  display:block;
  margin-bottom:12px;
}
.stat .num em{
  font-style:normal;
  font-size:.42em;
  font-weight:600;
  color:var(--c-accent);
  margin-left:6px;
}
.stat .cap{
  font-size:14.5px;
  line-height:1.8;
  color:#A8ACB2;
}
.quote-block{
  margin-top:clamp(32px,4vw,52px);
  padding-left:22px;
  border-left:2px solid var(--c-accent);
  font-size:16.5px;
  line-height:1.95;
  color:#D7D4CD;
  max-width:820px;
}

/* ---------- FAQ ---------- */
.faq-layout{
  display:grid;
  grid-template-columns:.5fr 1fr;
  gap:clamp(24px,4vw,64px);
  align-items:start;
}
.faq-side{position:sticky;top:104px;}
.faq-side h2{
  font-size:clamp(24px,2.9vw,34px);
  font-weight:700;
  line-height:1.25;
  margin-bottom:14px;
}
.faq-side p{font-size:15px;line-height:1.9;color:var(--c-ink-2);}
.faq-list{border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:20px;
  padding:22px 0;
  background:none;
  border:0;
  text-align:left;
  color:var(--c-ink);
  font-size:17px;
  font-weight:600;
  line-height:1.6;
  cursor:pointer;
  transition:color .2s ease;
}
.faq-q:hover{color:var(--c-accent);}
.faq-q .chev{
  flex-shrink:0;
  margin-top:3px;
  color:var(--c-mute);
  transition:transform .3s ease,color .2s ease;
}
.faq-item.is-open .faq-q .chev{transform:rotate(180deg);color:var(--c-accent);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .35s ease;
}
.faq-item.is-open .faq-a{max-height:520px;}
.faq-a p{
  padding:0 0 24px;
  margin:0;
  font-size:15.5px;
  line-height:1.95;
  color:var(--c-ink-2);
  max-width:44em;
}

/* ---------- 页内 CTA ---------- */
.cta-band{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:clamp(24px,4vw,48px);
  flex-wrap:wrap;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  padding:clamp(30px,4.5vw,56px);
  box-shadow:var(--sh-1);
}
.cta-band h2{
  font-size:clamp(23px,2.7vw,32px);
  font-weight:700;
  line-height:1.3;
  margin-bottom:10px;
}
.cta-band p{
  font-size:15.5px;
  line-height:1.9;
  color:var(--c-ink-2);
  max-width:36em;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--space-section);
  background:var(--c-dark);
  color:#C9CCD1;
  padding:clamp(48px,6vw,76px) 0 0;
  border-top:1px solid rgba(255,255,255,.08);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr .9fr .9fr 1.2fr;
  gap:clamp(24px,3.5vw,48px);
  padding-bottom:clamp(32px,4vw,52px);
}
.footer-brand .brand{color:#fff;margin-bottom:16px;}
.footer-brand .brand:hover{color:#fff;}
.footer-brand .brand-text{color:#fff;}
.footer-brand .brand-sub{color:#9BA0A7;}
.footer-brand p{
  font-size:14.5px;
  line-height:1.9;
  color:#9BA0A7;
  max-width:30em;
}
.footer-col h4{
  font-size:13px;
  font-weight:600;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:#fff;
  margin-bottom:16px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col a{
  font-size:14.5px;
  color:#A9AEB5;
  transition:color .2s ease,padding-left .2s ease;
}
.footer-col a:hover{color:#fff;padding-left:3px;}
.footer-contact li{
  font-size:14px;
  line-height:1.8;
  color:#9BA0A7;
}
.footer-contact strong{
  display:block;
  color:#E4E1DB;
  font-weight:600;
  font-size:13px;
  letter-spacing:.05em;
  margin-bottom:2px;
}
.footer-bottom{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0 26px;
  font-size:13px;
  letter-spacing:.02em;
  color:#868B92;
}

/* ---------- 动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .42s cubic-bezier(.2,.7,.3,1),transform .42s cubic-bezier(.2,.7,.3,1);
  will-change:opacity,transform;
}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media screen and (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .hero-media{aspect-ratio:16/9;order:-1;}
  .intro-grid{grid-template-columns:.8fr 1fr;}
  .intro-title{position:static;}
  .feature-row{grid-template-columns:1fr;gap:24px;}
  .feature-row.is-reverse .feature-media{order:0;}
  .feature-row.is-reverse .feature-copy{order:1;}
  .faq-layout{grid-template-columns:1fr;gap:24px;}
  .faq-side{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .command-search{width:200px;}
  .command-search:focus-within{width:230px;}
}

@media screen and (max-width:768px){
  body{font-size:16px;}
  .wrap{padding-left:20px;padding-right:20px;}

  .nav-wrap{height:60px;gap:14px;}
  .site-header.is-scrolled .nav-wrap{height:60px;}
  .brand-text{font-size:16px;}
  .brand-sub{font-size:11px;margin-left:4px;}

  .main-nav{
    display:none;
    position:fixed;
    left:0;right:0;top:60px;
    z-index:79;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    background:var(--c-surface);
    border-bottom:1px solid var(--c-line);
    box-shadow:var(--sh-2);
    padding:8px 20px 18px;
    max-height:calc(100vh - 60px);
    overflow-y:auto;
  }
  .main-nav.is-open{display:flex;}
  .nav-link{
    padding:15px 6px;
    font-size:15.5px;
    border-radius:0;
    border-bottom:1px solid var(--c-line);
  }
  .nav-link:hover{background:transparent;}
  .nav-link.is-active::after{left:6px;right:auto;width:20px;bottom:8px;}

  .command-search{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-tools .btn-sm{height:38px;padding:0 14px;font-size:13.5px;}

  .crumbs{padding-top:18px;}
  .page-hero h1{font-size:clamp(28px,7vw,38px);}
  .hero-lede{font-size:16px;}

  .intro-grid{grid-template-columns:1fr;gap:20px;}
  .spec-grid{grid-template-columns:1fr;}
  .spec-item{border-right:0;}
  .spec-item:nth-last-child(-n+2){border-bottom:1px solid var(--c-line);}
  .spec-item:last-child{border-bottom:0;}

  .stats{grid-template-columns:1fr;gap:24px;}
  .stat{display:flex;align-items:baseline;gap:16px;}
  .stat .num{margin-bottom:0;flex-shrink:0;min-width:88px;}
  .stat .cap{font-size:14px;}

  .cta-band{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;}

  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;font-size:12.5px;}
}

@media screen and (max-width:520px){
  .hero-actions .btn{width:100%;}
  .tag{font-size:12.5px;padding:5px 11px;}
  .faq-q{font-size:16px;padding:18px 0;}
  .feature-media .badge{font-size:11.5px;padding:4px 10px;}
  .stat .num{min-width:74px;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
  --c-bg:#F5F3EE;
  --c-card:#FFFFFF;
  --c-ink:#15171B;
  --c-ink-2:#5A5F66;
  --c-mute:#6B6F76;
  --c-accent:#DE3A2B;
  --c-accent-d:#c62f22;
  --c-teal:#0FA98E;
  --c-line:#E3DFD6;
  --c-line-strong:#CDC7B9;
  --c-dark:#15171B;
  --c-dark-2:#1E2127;
  --c-soft:#FAF8F4;
  --r-card:14px;
  --r-img:18px;
  --r-btn:10px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(21,23,27,.06);
  --shadow-2:0 12px 32px -12px rgba(21,23,27,.16);
  --space-section:clamp(72px,9vw,140px);
  --wrap:1200px;
  --nav-h:68px;
}

*,*::before,*::after{box-sizing:border-box;}

html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}

body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-ink);
  font-family:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.9;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  padding-top:var(--nav-h);
}

img{max-width:100%;display:block;border-style:none;}
a{color:var(--c-accent);text-decoration:none;transition:color .18s ease;}
a:hover{color:var(--c-accent-d);}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid rgba(222,58,43,.5);outline-offset:2px;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:0;list-style:none;}
button{font-family:inherit;cursor:pointer;}
input{font-family:inherit;}

.wrap{
  width:100%;
  max-width:var(--wrap);
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:120;
  height:var(--nav-h);
  background:rgba(245,243,238,.93);
  -webkit-backdrop-filter:saturate(140%) blur(8px);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid transparent;
  transition:height .22s ease,border-color .22s ease,box-shadow .22s ease,background .22s ease;
}
.site-header.is-scrolled{
  height:56px;
  border-bottom-color:var(--c-line);
  box-shadow:var(--shadow-1);
  background:rgba(245,243,238,.97);
}
.nav-wrap{
  display:flex;
  align-items:center;
  gap:26px;
  height:100%;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--c-ink);
  flex-shrink:0;
}
.brand:hover{color:var(--c-ink);}
.brand-mark{
  width:26px;height:26px;
  border-radius:8px;
  background:var(--c-accent);
  position:relative;
  flex-shrink:0;
}
.brand-mark::after{
  content:"";
  position:absolute;
  inset:8px;
  border-radius:2px;
  background:#fff;
}
.brand-text{
  font-size:17px;
  font-weight:800;
  letter-spacing:-.01em;
  white-space:nowrap;
}
.brand-sub{
  font-size:12px;
  font-weight:500;
  color:var(--c-mute);
  margin-left:6px;
  letter-spacing:.04em;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:2px;
  flex:1 1 auto;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  border-radius:8px;
  font-size:14.5px;
  color:var(--c-ink-2);
  white-space:nowrap;
  transition:color .18s ease,background .18s ease;
}
.nav-link:hover{color:var(--c-ink);background:rgba(21,23,27,.05);}
.nav-link.is-active{color:var(--c-ink);font-weight:600;}
.nav-link.is-active::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:1px;
  height:2px;border-radius:2px;
  background:var(--c-accent);
}
.nav-tools{
  display:flex;
  align-items:center;
  gap:12px;
  margin-left:auto;
  flex-shrink:0;
}
.command-search{
  display:flex;
  align-items:center;
  gap:8px;
  height:38px;
  padding:0 10px;
  width:246px;
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:var(--r-btn);
  transition:border-color .18s ease,box-shadow .18s ease,width .18s ease;
}
.command-search:focus-within{
  border-color:var(--c-accent);
  box-shadow:0 0 0 2px rgba(222,58,43,.18);
  width:276px;
}
.cs-icon{display:inline-flex;color:var(--c-mute);flex-shrink:0;}
.command-search input{
  flex:1 1 auto;
  min-width:0;
  height:100%;
  border:0;
  background:transparent;
  font-size:13.5px;
  color:var(--c-ink);
  outline:none;
}
.command-search input::placeholder{color:#9A9C9F;}
.kbd{
  font-size:11px;
  line-height:1;
  padding:3px 6px;
  color:var(--c-mute);
  background:var(--c-soft);
  border:1px solid var(--c-line);
  border-radius:5px;
  flex-shrink:0;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:42px;
  padding:0 20px;
  border-radius:var(--r-btn);
  border:1px solid transparent;
  font-size:14.5px;
  font-weight:600;
  line-height:1;
  letter-spacing:0;
  transition:background .18s ease,border-color .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn .arrow{transition:transform .18s ease;}
.btn:hover .arrow{transform:translateX(3px);}
.btn-primary{
  background:var(--c-accent);
  border-color:var(--c-accent);
  color:#fff;
}
.btn-primary:hover{
  background:var(--c-accent-d);
  border-color:var(--c-accent-d);
  color:#fff;
  transform:translateY(-1px);
  box-shadow:0 10px 22px -12px rgba(222,58,43,.9);
}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{
  background:transparent;
  border-color:var(--c-line-strong);
  color:var(--c-ink);
}
.btn-ghost:hover{
  border-color:var(--c-ink);
  color:var(--c-ink);
  background:rgba(21,23,27,.03);
  transform:translateY(-1px);
}
.btn-sm{height:36px;padding:0 15px;font-size:13.5px;}
.btn-lg{height:50px;padding:0 26px;font-size:15.5px;}
.btn-on-dark{
  background:transparent;
  border-color:rgba(255,255,255,.32);
  color:#fff;
}
.btn-on-dark:hover{
  background:rgba(255,255,255,.1);
  border-color:rgba(255,255,255,.6);
  color:#fff;
}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:38px;height:38px;
  padding:0;
  border:1px solid var(--c-line);
  border-radius:9px;
  background:#fff;
  color:var(--c-ink);
}

/* ---------- 面包屑 ---------- */
.crumb-bar{
  padding-top:calc(var(--nav-h) + 30px);
}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  letter-spacing:.04em;
  color:var(--c-mute);
}
.breadcrumb a{color:var(--c-mute);}
.breadcrumb a:hover{color:var(--c-accent);}
.breadcrumb .sep{color:#B9B4A7;}
.breadcrumb .current{color:var(--c-ink);font-weight:600;}

/* ---------- 分类首屏 ---------- */
.cat-hero{
  padding-top:26px;
  padding-bottom:0;
}
.cat-hero .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:5px 12px;
  border-radius:var(--r-pill);
  background:rgba(222,58,43,.08);
  border:1px solid rgba(222,58,43,.18);
  color:var(--c-accent);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.05em;
}
.cat-hero h1{
  margin-top:20px;
  max-width:16em;
  font-size:clamp(34px,4.9vw,58px);
  font-weight:800;
  line-height:1.12;
  letter-spacing:-.02em;
}
.cat-hero h1 em{
  font-style:normal;
  color:var(--c-accent);
}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:24px;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:6px 13px;
  border-radius:var(--r-pill);
  border:1px solid var(--c-line);
  background:var(--c-card);
  font-size:12.5px;
  color:var(--c-ink-2);
  letter-spacing:.03em;
}
.chip .dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--c-teal);
}
.chip--accent{border-color:rgba(222,58,43,.24);color:var(--c-accent);background:rgba(222,58,43,.05);}

/* 导语两栏 */
.lead-grid{
  display:grid;
  grid-template-columns:minmax(0,5fr) minmax(0,7fr);
  gap:clamp(28px,4vw,64px);
  margin-top:clamp(40px,5vw,64px);
  padding-top:clamp(36px,4vw,52px);
  border-top:1px solid var(--c-line);
  align-items:start;
}
.lead-left h2{
  font-size:clamp(24px,2.6vw,32px);
  font-weight:700;
  line-height:1.3;
  letter-spacing:-.01em;
}
.lead-left p{
  margin-top:14px;
  font-size:14.5px;
  line-height:1.85;
  color:var(--c-mute);
}
.lead-left .lead-stat{
  margin-top:26px;
  display:flex;
  gap:28px;
  padding-top:20px;
  border-top:1px solid var(--c-line);
}
.lead-stat b{
  display:block;
  font-size:26px;
  font-weight:800;
  letter-spacing:-.02em;
  line-height:1.2;
}
.lead-stat span{
  display:block;
  margin-top:4px;
  font-size:12.5px;
  color:var(--c-mute);
  letter-spacing:.04em;
}
.lead-right p{
  font-size:17px;
  line-height:1.95;
  color:var(--c-ink-2);
}
.lead-right p + p{margin-top:16px;}
.lead-figure{
  margin-top:26px;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--c-line);
  background:var(--c-soft);
  box-shadow:var(--shadow-1);
}
.lead-figure img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
}
.lead-figure figcaption{
  padding:12px 18px;
  font-size:12.5px;
  color:var(--c-mute);
  letter-spacing:.03em;
  border-top:1px solid var(--c-line);
  background:#fff;
}

/* ---------- 板块通用 ---------- */
.section{
  padding-top:var(--space-section);
  scroll-margin-top:96px;
}
.section-head{
  max-width:680px;
  margin-bottom:clamp(32px,4vw,52px);
}
.section-head h2{
  font-size:clamp(26px,3.2vw,38px);
  font-weight:700;
  line-height:1.28;
  letter-spacing:-.01em;
}
.section-head p{
  margin-top:14px;
  font-size:16px;
  line-height:1.9;
  color:var(--c-ink-2);
}
.kicker{
  display:block;
  margin-bottom:12px;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--c-accent);
}

/* ---------- 时间线 ---------- */
.timeline{
  position:relative;
  padding-left:78px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:27px;
  top:10px;
  bottom:14px;
  width:2px;
  border-radius:2px;
  background:var(--c-line);
}
.tl-item{
  position:relative;
  padding-bottom:clamp(30px,3.4vw,44px);
}
.tl-item:last-child{padding-bottom:0;}
.tl-num{
  position:absolute;
  left:-78px;
  top:-4px;
  width:56px;height:56px;
  display:grid;
  place-items:center;
  border-radius:16px;
  background:var(--c-card);
  border:1px solid var(--c-line);
  color:var(--c-accent);
  font-size:17px;
  font-weight:800;
  letter-spacing:-.02em;
  box-shadow:var(--shadow-1);
  transition:border-color .2s ease,transform .2s ease,color .2s ease;
}
.tl-item:hover .tl-num{
  border-color:var(--c-accent);
  transform:translateY(-2px);
}
.tl-body{
  background:var(--c-card);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:24px 26px;
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.tl-item:hover .tl-body{
  border-color:rgba(222,58,43,.45);
  box-shadow:var(--shadow-2);
  transform:translateY(-2px);
}
.tl-body h3{
  font-size:20px;
  font-weight:600;
  line-height:1.5;
  letter-spacing:-.01em;
}
.tl-body p{
  margin-top:10px;
  font-size:15.5px;
  line-height:1.9;
  color:var(--c-ink-2);
}
.tl-note{
  display:inline-flex;
  align-items:center;
  gap:7px;
  margin-top:14px;
  padding:4px 11px;
  border-radius:var(--r-pill);
  background:var(--c-soft);
  border:1px solid var(--c-line);
  font-size:12px;
  color:var(--c-mute);
  letter-spacing:.04em;
}

/* ---------- 场景卡片 ---------- */
.grid-cards{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:20px;
}
.card{
  background:var(--c-card);
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  padding:26px;
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.card:hover{
  border-color:var(--c-accent);
  box-shadow:var(--shadow-2);
  transform:translateY(-2px);
}
.card .card-icon{
  display:inline-grid;
  place-items:center;
  width:40px;height:40px;
  border-radius:11px;
  background:rgba(222,58,43,.08);
  color:var(--c-accent);
  margin-bottom:18px;
}
.card h3{
  font-size:18.5px;
  font-weight:600;
  line-height:1.5;
}
.card p{
  margin-top:10px;
  font-size:14.5px;
  line-height:1.85;
  color:var(--c-ink-2);
}
.card .tagline{
  display:inline-block;
  margin-top:16px;
  font-size:12px;
  letter-spacing:.05em;
  color:var(--c-mute);
  padding-top:14px;
  border-top:1px solid var(--c-line);
  width:100%;
}

/* ---------- 深色细节区 ---------- */
.dark-section{
  margin-top:var(--space-section);
  padding:clamp(56px,6.5vw,96px) 0;
  background:var(--c-dark);
  color:#F2F0EA;
  scroll-margin-top:96px;
}
.dark-section .kicker{color:#F08C80;}
.dark-section .section-head h2{color:#fff;}
.dark-section .section-head p{color:#A9ADB4;}
.detail-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0;
  border-top:1px solid rgba(255,255,255,.12);
}
.detail-item{
  padding:26px 30px 26px 0;
  border-bottom:1px solid rgba(255,255,255,.12);
  display:flex;
  gap:18px;
  align-items:flex-start;
}
.detail-item:nth-child(odd){
  padding-right:38px;
  border-right:1px solid rgba(255,255,255,.12);
}
.detail-item:nth-child(even){
  padding-left:38px;
}
.detail-item .idx{
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
  color:#F08C80;
  padding-top:4px;
  flex-shrink:0;
}
.detail-item h3{
  font-size:18px;
  font-weight:600;
  color:#fff;
  line-height:1.5;
}
.detail-item p{
  margin-top:8px;
  font-size:14.5px;
  line-height:1.9;
  color:#A9ADB4;
}

/* ---------- FAQ ---------- */
.faq-layout{
  display:grid;
  grid-template-columns:minmax(0,4fr) minmax(0,8fr);
  gap:clamp(28px,4vw,64px);
  align-items:start;
}
.faq-side{
  position:sticky;
  top:104px;
}
.faq-side h2{
  font-size:clamp(26px,3.2vw,36px);
  font-weight:700;
  line-height:1.3;
  letter-spacing:-.01em;
}
.faq-side p{
  margin-top:14px;
  font-size:14.5px;
  line-height:1.9;
  color:var(--c-mute);
}
.faq-side .btn{margin-top:22px;}
.faq-list{border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:22px 0;
  border:0;
  background:transparent;
  text-align:left;
  font-size:16.5px;
  font-weight:600;
  line-height:1.6;
  color:var(--c-ink);
  transition:color .18s ease;
}
.faq-q:hover{color:var(--c-accent);}
.faq-q .chev{
  flex-shrink:0;
  color:var(--c-mute);
  transition:transform .24s ease,color .18s ease;
}
.faq-item.is-open .faq-q{color:var(--c-accent);}
.faq-item.is-open .chev{transform:rotate(180deg);color:var(--c-accent);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
}
.faq-a-inner{
  padding:0 0 24px;
  font-size:15.5px;
  line-height:1.9;
  color:var(--c-ink-2);
  max-width:62ch;
}

/* ---------- CTA ---------- */
.cta-section{
  padding-top:var(--space-section);
  scroll-margin-top:96px;
}
.cta-box{
  position:relative;
  overflow:hidden;
  border-radius:var(--r-img);
  border:1px solid var(--c-line);
  background:var(--c-card);
  padding:clamp(36px,5vw,64px);
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:clamp(28px,4vw,56px);
  align-items:center;
  box-shadow:var(--shadow-1);
}
.cta-box::before{
  content:"";
  position:absolute;
  left:0;top:0;bottom:0;
  width:5px;
  background:var(--c-accent);
}
.cta-box h2{
  font-size:clamp(25px,3vw,34px);
  font-weight:700;
  line-height:1.3;
  letter-spacing:-.01em;
}
.cta-box p{
  margin-top:14px;
  font-size:16px;
  line-height:1.9;
  color:var(--c-ink-2);
}
.cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:26px;
}
.cta-side{
  border-left:1px solid var(--c-line);
  padding-left:clamp(20px,3vw,36px);
}
.cta-side ul li{
  display:flex;
  gap:12px;
  padding:12px 0;
  border-bottom:1px dashed var(--c-line);
  font-size:14.5px;
  color:var(--c-ink-2);
}
.cta-side ul li:last-child{border-bottom:0;}
.cta-side ul li b{
  color:var(--c-ink);
  font-weight:600;
  flex-shrink:0;
}

/* ---------- 浮动 CTA ---------- */
.float-cta{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:110;
  display:flex;
  align-items:center;
  gap:10px;
  padding:8px;
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.96);
  border:1px solid var(--c-line);
  box-shadow:var(--shadow-2);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s ease;
}
.float-cta.is-visible{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.float-cta .btn{border-radius:var(--r-pill);}
.to-top{
  display:inline-grid;
  place-items:center;
  width:36px;height:36px;
  border-radius:50%;
  border:1px solid var(--c-line);
  background:#fff;
  color:var(--c-ink-2);
  transition:border-color .18s ease,color .18s ease,transform .18s ease;
}
.to-top:hover{
  border-color:var(--c-accent);
  color:var(--c-accent);
  transform:translateY(-2px);
}

/* ---------- 页脚 ---------- */
.site-footer{
  margin-top:var(--space-section);
  background:var(--c-dark);
  color:#C6C9CE;
  border-top:1px solid rgba(255,255,255,.1);
}
.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));
  gap:clamp(28px,4vw,56px);
  padding:clamp(48px,6vw,80px) 0 clamp(32px,4vw,48px);
}
.footer-brand .brand{color:#fff;}
.footer-brand .brand:hover{color:#fff;}
.footer-brand .brand-sub{color:#8C9096;}
.footer-brand p{
  margin-top:18px;
  font-size:14px;
  line-height:1.9;
  color:#9CA1A8;
  max-width:34ch;
}
.footer-col h4{
  font-size:13px;
  font-weight:600;
  letter-spacing:.1em;
  color:#fff;
  text-transform:uppercase;
  margin-bottom:18px;
}
.footer-col ul li{margin-bottom:11px;}
.footer-col ul li a{
  color:#9CA1A8;
  font-size:14.5px;
  transition:color .18s ease;
}
.footer-col ul li a:hover{color:#fff;}
.footer-contact li{
  font-size:13.5px;
  line-height:1.8;
  color:#9CA1A8;
  margin-bottom:12px;
}
.footer-contact li strong{
  display:block;
  color:#fff;
  font-weight:600;
  font-size:13px;
  letter-spacing:.04em;
  margin-bottom:2px;
}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  padding:22px 0 28px;
  border-top:1px solid rgba(255,255,255,.1);
  font-size:12.5px;
  letter-spacing:.03em;
  color:#82878E;
}

/* ---------- 入场动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .42s cubic-bezier(.2,.7,.3,1),transform .42s cubic-bezier(.2,.7,.3,1);
}
.reveal.is-in{opacity:1;transform:translateY(0);}

/* ---------- 响应式 ---------- */
@media (max-width:1199px){
  .command-search{width:210px;}
  .command-search:focus-within{width:236px;}
  .grid-cards{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:1023px){
  .main-nav{gap:0;}
  .nav-link{padding:8px 9px;font-size:14px;}
  .command-search{width:180px;}
  .command-search:focus-within{width:200px;}
  .lead-grid{grid-template-columns:1fr;gap:28px;}
  .cta-box{grid-template-columns:1fr;gap:28px;}
  .cta-side{border-left:0;border-top:1px solid var(--c-line);padding-left:0;padding-top:22px;}
  .faq-layout{grid-template-columns:1fr;gap:32px;}
  .faq-side{position:static;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}

@media (max-width:900px){
  .command-search{display:none;}
}

@media (max-width:767px){
  body{padding-top:56px;}
  .site-header{height:56px;}
  .nav-toggle{display:inline-flex;}
  .main-nav{
    position:fixed;
    top:56px;left:0;right:0;
    z-index:130;
    flex-direction:column;
    align-items:stretch;
    gap:2px;
    padding:14px 20px 20px;
    background:#fff;
    border-bottom:1px solid var(--c-line);
    box-shadow:0 18px 32px -22px rgba(21,23,27,.35);
    display:none;
  }
  .main-nav.is-open{display:flex;}
  .nav-link{
    padding:12px 12px;
    font-size:15.5px;
    border-radius:10px;
  }
  .nav-link.is-active::after{left:12px;right:auto;width:22px;}
  .nav-tools{gap:10px;}
  .wrap{padding-left:20px;padding-right:20px;}
  .cr{ }
  .timeline{padding-left:60px;}
  .timeline::before{left:19px;}
  .tl-num{
    left:-60px;
    width:40px;height:40px;
    border-radius:12px;
    font-size:14px;
    top:0;
  }
  .tl-body{padding:20px;}
  .tl-body h3{font-size:17.5px;}
  .tl-body p{font-size:14.5px;}
  .detail-grid{grid-template-columns:1fr;}
  .detail-item,
  .detail-item:nth-child(odd),
  .detail-item:nth-child(even){
    padding:22px 0;
    border-right:0;
    border-bottom:1px solid rgba(255,255,255,.12);
  }
  .grid-cards{grid-template-columns:1fr;}
  .cta-box{padding:28px 22px;}
  .float-cta{
    right:0;left:0;bottom:0;
    border-radius:0;
    border-left:0;border-right:0;border-bottom:0;
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    justify-content:space-between;
  }
  .float-cta .btn{flex:1 1 auto;justify-content:center;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .lead-stat{gap:22px;}
}

@media (max-width:519px){
  .brand-text{font-size:15.5px;}
  .brand-sub{font-size:11px;margin-left:5px;}
  .cat-hero h1{font-size:clamp(28px,8vw,36px);}
  .hero-meta{gap:8px;}
  .chip{font-size:12px;padding:5px 11px;}
  .section-head h2{font-size:24px;}
  .faq-q{font-size:15.5px;padding:18px 0;}
  .btn-lg{height:46px;padding:0 20px;font-size:15px;}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category4 */
:root{
  --c-bg:#F5F3EE;
  --c-surface:#FFFFFF;
  --c-ink:#15171B;
  --c-ink-2:#5A5F66;
  --c-ink-3:#6B6F76;
  --c-accent:#DE3A2B;
  --c-accent-dark:#C3301F;
  --c-cool:#0FA98E;
  --c-border:#E3DFD6;
  --c-paper-2:#EDEAE2;
  --r-card:14px;
  --r-img:18px;
  --r-btn:10px;
  --shadow-1:0 1px 2px rgba(21,23,27,.06);
  --shadow-2:0 12px 32px -12px rgba(21,23,27,.16);
  --space-section:clamp(72px,9vw,140px);
  --wrap:1200px;
  --font-sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-num:"Inter","Noto Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--c-bg);color:var(--c-ink);font-family:var(--font-sans);font-size:17px;line-height:1.9;letter-spacing:.01em;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease}
a:hover{color:var(--c-accent)}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:3px}
.page{padding-top:68px;overflow-x:hidden}

/* ---------- 布局容器 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.section{padding:var(--space-section) 0}
.section-tight{padding:clamp(44px,6vw,72px) 0}

/* ---------- 顶部命令栏 ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:90;background:rgba(245,243,238,.94);border-bottom:1px solid transparent;transition:background .25s ease,border-color .25s ease,box-shadow .25s ease}
.site-header.is-scrolled{background:rgba(245,243,238,.97);border-bottom-color:var(--c-border);box-shadow:0 4px 18px -14px rgba(21,23,27,.4)}
.nav-wrap{display:flex;align-items:center;gap:20px;height:68px;transition:height .25s ease}
.site-header.is-scrolled .nav-wrap{height:56px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:-.01em;color:var(--c-ink);flex:none}
.brand:hover{color:var(--c-ink)}
.brand-mark{position:relative;width:24px;height:24px;border-radius:7px;background:var(--c-accent);flex:none}
.brand-mark::after{content:"";position:absolute;inset:7px;border-radius:2px;background:rgba(255,255,255,.92)}
.brand-text{display:inline-flex;align-items:baseline;gap:6px;white-space:nowrap}
.brand-sub{font-size:11.5px;font-weight:600;letter-spacing:.1em;color:var(--c-ink-3)}
.main-nav{display:flex;align-items:center;gap:2px;flex:1;justify-content:center}
.nav-link{padding:8px 14px;border-radius:999px;font-size:15px;font-weight:500;color:var(--c-ink-2);border:1px solid transparent;white-space:nowrap;transition:background .2s ease,color .2s ease,border-color .2s ease}
.nav-link:hover{color:var(--c-ink);background:rgba(21,23,27,.05)}
.nav-link.is-active{color:var(--c-ink);background:#fff;border-color:var(--c-border);font-weight:600}
.nav-tools{display:flex;align-items:center;gap:10px;flex:none}
.command-search{display:flex;align-items:center;gap:8px;height:40px;width:232px;padding:0 10px;border:1px solid var(--c-border);border-radius:var(--r-btn);background:#fff;transition:border-color .2s ease,box-shadow .2s ease,width .2s ease}
.command-search:focus-within{border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(222,58,43,.16);width:248px}
.cs-icon{display:inline-flex;color:var(--c-ink-3);flex:none}
.command-search input{flex:1;min-width:0;height:100%;border:0;background:transparent;outline:none;font-size:14px;color:var(--c-ink);-webkit-appearance:none;appearance:none}
.command-search input::placeholder{color:#9A9E9F}
.command-search input::-webkit-search-cancel-button{-webkit-appearance:none}
.kbd{flex:none;font-family:var(--font-num);font-size:11px;line-height:1;color:var(--c-ink-3);border:1px solid var(--c-border);border-radius:6px;padding:4px 5px;background:var(--c-bg)}
.nav-toggle{display:none;align-items:center;justify-content:center;width:40px;height:40px;border:1px solid var(--c-border);border-radius:var(--r-btn);background:#fff;color:var(--c-ink)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background .2s ease,border-color .2s ease,color .2s ease,transform .2s ease}
.btn .arrow{transition:transform .2s ease}
.btn:hover .arrow{transform:translateX(3px)}
.btn-primary{background:var(--c-accent);border-color:var(--c-accent);color:#fff}
.btn-primary:hover{background:var(--c-accent-dark);border-color:var(--c-accent-dark);color:#fff}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--c-border);color:var(--c-ink)}
.btn-ghost:hover{border-color:var(--c-accent);color:var(--c-accent);background:rgba(222,58,43,.04)}
.btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px}
.btn-block{width:100%}

/* ---------- 面包屑 ---------- */
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;letter-spacing:.04em;color:var(--c-ink-3);padding-top:clamp(24px,4vw,40px);flex-wrap:wrap}
.crumbs a{color:var(--c-ink-2)}
.crumbs .sepc{color:#B9B4A8}

/* ---------- 分类 Hero ---------- */
.cat-hero{padding-bottom:clamp(36px,5vw,56px)}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:clamp(28px,4vw,56px);align-items:center;margin-top:clamp(20px,3vw,34px)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;letter-spacing:.12em;color:var(--c-accent);text-transform:uppercase;margin-bottom:16px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--c-accent);border-radius:2px}
h1{font-size:clamp(32px,4.6vw,60px);line-height:1.1;letter-spacing:-.02em;font-weight:800;margin-bottom:20px}
h1 .hl{color:var(--c-accent)}
.hero-lead{font-size:clamp(16px,1.35vw,18px);color:var(--c-ink-2);line-height:1.9;max-width:56ch}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.tag{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:500;color:var(--c-ink-2);background:#fff;border:1px solid var(--c-border);border-radius:999px;padding:6px 12px}
.tag-dot{width:6px;height:6px;border-radius:50%;background:var(--c-cool);flex:none}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-figure{position:relative;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--c-border);box-shadow:var(--shadow-2);aspect-ratio:4/3;background:var(--c-paper-2)}
.hero-figure img{width:100%;height:100%;object-fit:cover}
.hero-figure::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,0) 42%,rgba(0,0,0,.58) 100%);pointer-events:none}
.fig-badge{position:absolute;left:16px;bottom:16px;z-index:2;display:inline-flex;align-items:center;gap:8px;background:rgba(21,23,27,.82);border:1px solid rgba(255,255,255,.18);color:#fff;font-size:12.5px;font-weight:600;letter-spacing:.04em;border-radius:999px;padding:7px 14px;backdrop-filter:blur(4px)}
.fig-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--c-cool);flex:none}

/* ---------- 深色指标带 ---------- */
.stat-band{background:var(--c-ink);color:#fff;border-radius:var(--r-img);padding:clamp(26px,3.6vw,44px) clamp(24px,3.4vw,40px);display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(18px,3vw,32px);margin-top:clamp(36px,5vw,56px);box-shadow:var(--shadow-2)}
.stat-item{padding-left:clamp(14px,2vw,22px);border-left:1px solid rgba(255,255,255,.14)}
.stat-item:first-child{padding-left:0;border-left:0}
.stat-num{display:block;font-family:var(--font-num);font-size:clamp(26px,3.2vw,40px);font-weight:700;letter-spacing:-.02em;line-height:1.15}
.stat-num .unit{font-size:.55em;font-weight:600;color:var(--c-accent);margin-left:2px}
.stat-label{display:block;margin-top:6px;font-size:13px;letter-spacing:.04em;color:rgba(255,255,255,.62)}

/* ---------- 板块标题 ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:clamp(28px,4vw,44px);flex-wrap:wrap}
.sec-title{font-size:clamp(25px,3.1vw,38px);font-weight:700;letter-spacing:-.01em;line-height:1.24}
.sec-title .sep{color:var(--c-accent);margin:0 8px;font-weight:600}
.sec-desc{font-size:16px;color:var(--c-ink-2);max-width:54ch;line-height:1.85}

/* ---------- 版本主体：卡片栅格 + 侧栏 ---------- */
.version-layout{display:grid;grid-template-columns:minmax(0,1fr) 322px;gap:clamp(24px,3vw,36px);align-items:start}
.v-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.v-card{display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease}
.v-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--c-accent)}
.v-card-media{aspect-ratio:16/9;overflow:hidden;background:var(--c-paper-2);border-bottom:1px solid var(--c-border)}
.v-card-media img{width:100%;height:100%;object-fit:cover;transition:transform .55s cubic-bezier(.2,.7,.3,1)}
.v-card:hover .v-card-media img{transform:scale(1.04)}
.v-card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.v-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12.5px;letter-spacing:.04em;color:var(--c-ink-3)}
.badge{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:600;letter-spacing:.03em;border-radius:999px;padding:4px 10px;border:1px solid transparent;white-space:nowrap}
.badge-new{background:rgba(15,169,142,.1);color:#0B7C68;border-color:rgba(15,169,142,.3)}
.badge-accent{background:rgba(222,58,43,.08);color:var(--c-accent);border-color:rgba(222,58,43,.26)}
.badge-plain{background:var(--c-bg);color:var(--c-ink-2);border-color:var(--c-border)}
.v-card h3{font-size:19px;font-weight:600;line-height:1.5;letter-spacing:-.005em}
.v-card h3 a{color:var(--c-ink)}
.v-card h3 a:hover{color:var(--c-accent)}
.v-card p{font-size:14.5px;color:var(--c-ink-2);line-height:1.8}
.v-list{display:flex;flex-direction:column;gap:6px;font-size:14.5px;color:var(--c-ink-2);line-height:1.75}
.v-list li{position:relative;padding-left:16px}
.v-list li::before{content:"";position:absolute;left:0;top:.72em;width:6px;height:1.5px;background:var(--c-accent);border-radius:2px}
.v-card-foot{margin-top:auto;padding-top:6px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--c-ink-3)}
.v-link{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:14px;color:var(--c-accent)}
.v-link:hover{color:var(--c-accent-dark)}
.v-link .arrow{transition:transform .2s ease}
.v-link:hover .arrow{transform:translateX(3px)}

/* ---------- 侧栏 ---------- */
.side-col{display:flex;flex-direction:column;gap:20px;position:sticky;top:96px}
.side-card{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--r-card);padding:24px;box-shadow:var(--shadow-1)}
.side-card h4{font-size:16px;font-weight:700;letter-spacing:-.005em;margin-bottom:12px}
.side-card p{font-size:14px;color:var(--c-ink-2);line-height:1.8}
.side-card .side-note{margin-top:12px;font-size:12.5px;color:var(--c-ink-3);letter-spacing:.02em}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{display:inline-flex;align-items:center;font-size:13px;color:var(--c-ink-2);background:#fff;border:1px solid var(--c-border);border-radius:999px;padding:6px 12px;transition:border-color .2s ease,color .2s ease,background .2s ease}
.chip:hover{border-color:var(--c-accent);color:var(--c-accent);background:rgba(222,58,43,.04)}
.chip.is-on{border-color:var(--c-accent);color:var(--c-accent);background:rgba(222,58,43,.06);font-weight:600}
.side-list{display:flex;flex-direction:column;gap:12px;margin-top:14px}
.side-list li{display:flex;gap:10px;font-size:14px;color:var(--c-ink-2);line-height:1.7}
.side-list .idx{font-family:var(--font-num);font-size:13px;font-weight:700;color:var(--c-accent);flex:none;line-height:1.7}
.side-form{display:flex;flex-direction:column;gap:10px;margin-top:14px}
.field{height:44px;width:100%;border:1px solid var(--c-border);border-radius:var(--r-btn);background:#fff;padding:0 14px;font-size:14px;color:var(--c-ink);transition:border-color .2s ease,box-shadow .2s ease}
.field::placeholder{color:#9A9E9F}
.field:focus{outline:none;border-color:var(--c-accent);box-shadow:0 0 0 3px rgba(222,58,43,.16)}
.side-card-dark{background:var(--c-ink);border-color:var(--c-ink);color:#fff}
.side-card-dark h4{color:#fff}
.side-card-dark p{color:rgba(255,255,255,.7)}
.side-card-dark .side-note{color:rgba(255,255,255,.5)}
.side-card-dark .btn-primary{background:var(--c-accent);border-color:var(--c-accent)}

/* ---------- 更新类型 ---------- */
.type-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(20px,3vw,36px)}
.type-item{border-top:2px solid var(--c-ink);padding-top:20px}
.type-item .no{font-family:var(--font-num);font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--c-accent)}
.type-item h3{font-size:20px;font-weight:600;line-height:1.45;margin:10px 0 10px}
.type-item p{font-size:15px;color:var(--c-ink-2);line-height:1.85}

/* ---------- CTA 带 ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--c-ink);color:#fff;border-radius:var(--r-img);padding:clamp(34px,5vw,64px);display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center}
.cta-band::before{content:"";position:absolute;inset:0;background-image:url(/assets/images/backpic/back-3.png);background-size:cover;background-position:center;opacity:.16;pointer-events:none}
.cta-band > *{position:relative;z-index:1}
.cta-band h2{font-size:clamp(24px,3vw,36px);font-weight:700;letter-spacing:-.01em;line-height:1.3;margin-bottom:12px}
.cta-band p{font-size:15.5px;color:rgba(255,255,255,.72);max-width:52ch;line-height:1.85}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-band .btn-ghost{border-color:rgba(255,255,255,.28);color:#fff}
.cta-band .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.1);color:#fff}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:308px minmax(0,1fr);gap:clamp(28px,4vw,56px);align-items:start}
.faq-head{position:sticky;top:96px}
.faq-head .sec-title{margin-bottom:14px}
.faq-head p{font-size:15px;color:var(--c-ink-2);line-height:1.85}
.faq-list{border-top:1px solid var(--c-border)}
.faq-item{border-bottom:1px solid var(--c-border)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;text-align:left;padding:20px 0;font-size:16.5px;font-weight:600;color:var(--c-ink);line-height:1.6}
.faq-q:hover{color:var(--c-accent)}
.faq-q .ic{flex:none;display:inline-flex;color:var(--c-ink-3);transition:transform .3s ease,color .2s ease}
.faq-item.is-open .faq-q .ic{transform:rotate(180deg);color:var(--c-accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .32s cubic-bezier(.2,.7,.3,1)}
.faq-a p{padding-bottom:22px;font-size:15px;line-height:1.9;color:var(--c-ink-2);max-width:70ch}

/* ---------- 浮动 CTA ---------- */
.float-cta{position:fixed;right:24px;bottom:24px;z-index:60;display:flex;align-items:center;gap:10px;opacity:0;transform:translateY(12px);pointer-events:none;transition:opacity .3s ease,transform .3s ease}
.float-cta.is-visible{opacity:1;transform:none;pointer-events:auto}
.float-cta .btn{border-radius:999px;box-shadow:var(--shadow-2)}
.float-top{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:50%;background:#fff;border:1px solid var(--c-border);color:var(--c-ink-2);box-shadow:var(--shadow-2);transition:border-color .2s ease,color .2s ease,transform .2s ease}
.float-top:hover{border-color:var(--c-accent);color:var(--c-accent);transform:translateY(-2px)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--c-ink);color:rgba(255,255,255,.72);margin-top:var(--space-section);padding-top:clamp(48px,6vw,76px)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.35fr;gap:clamp(24px,3.4vw,48px);padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.12)}
.site-footer .brand{color:#fff}
.site-footer .brand:hover{color:#fff}
.site-footer .brand-sub{color:rgba(255,255,255,.55)}
.footer-brand p{margin-top:16px;font-size:14.5px;line-height:1.85;color:rgba(255,255,255,.62);max-width:38ch}
.footer-col h4{font-size:13.5px;font-weight:700;letter-spacing:.1em;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px;font-size:14.5px}
.footer-col a{color:rgba(255,255,255,.72)}
.footer-col a:hover{color:#fff}
.footer-contact li{display:flex;flex-direction:column;gap:2px;font-size:14px;color:rgba(255,255,255,.62);line-height:1.7}
.footer-contact strong{font-size:12.5px;font-weight:600;letter-spacing:.06em;color:rgba(255,255,255,.9)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;padding:22px 0 30px;font-size:13px;letter-spacing:.02em;color:rgba(255,255,255,.48)}

/* ---------- 动效 ---------- */
.fade-up{opacity:0;transform:translateY(12px);transition:opacity .42s cubic-bezier(.2,.7,.3,1),transform .42s cubic-bezier(.2,.7,.3,1)}
.fade-up.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .fade-up{opacity:1;transform:none;transition:none}
  .v-card,.v-card-media img,.btn .arrow,.float-cta{transition:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .command-search{width:200px}
  .command-search:focus-within{width:214px}
  .nav-link{padding:8px 11px;font-size:14.5px}
}
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .hero-figure{aspect-ratio:16/9}
  .version-layout{grid-template-columns:1fr}
  .side-col{position:static;flex-direction:row;flex-wrap:wrap}
  .side-card{flex:1 1 280px}
  .faq-grid{grid-template-columns:1fr;gap:28px}
  .faq-head{position:static}
  .stat-band{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  .stat-item:nth-child(3){padding-left:0;border-left:0}
  .footer-grid{grid-template-columns:1fr 1fr}
  .command-search{display:none}
  .main-nav{gap:0}
}
@media (max-width:880px){
  .main-nav{position:fixed;top:68px;left:0;right:0;display:none;flex-direction:column;align-items:stretch;justify-content:flex-start;gap:4px;background:var(--c-bg);border-bottom:1px solid var(--c-border);padding:14px 24px 22px;box-shadow:var(--shadow-2)}
  .main-nav.is-open{display:flex}
  .nav-link{padding:12px 14px;border-radius:10px;font-size:15.5px}
  .nav-toggle{display:inline-flex}
  .nav-wrap{height:68px}
  .site-header.is-scrolled .nav-wrap{height:68px}
  .page{padding-top:68px}
}
@media (max-width:768px){
  .v-grid{grid-template-columns:1fr}
  .type-grid{grid-template-columns:1fr;gap:24px}
  .cta-band{grid-template-columns:1fr;gap:24px}
  .sec-head{flex-direction:column;align-items:flex-start;gap:12px}
  .float-cta{left:0;right:0;bottom:0;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:#fff;border-top:1px solid var(--c-border);gap:10px;box-shadow:0 -8px 24px -18px rgba(21,23,27,.5)}
  .float-cta .btn{flex:1;height:44px}
  .float-top{width:44px;height:44px;border-radius:var(--r-btn)}
  .side-col{flex-direction:column}
  .side-card{flex:1 1 auto;width:100%}
}
@media (max-width:520px){
  body{font-size:16px}
  .wrap{padding:0 20px}
  .brand{font-size:16px}
  .brand-sub{font-size:10.5px}
  .stat-band{grid-template-columns:1fr;gap:18px}
  .stat-item{padding-left:0;border-left:0;border-top:1px solid rgba(255,255,255,.14);padding-top:16px}
  .stat-item:first-child{border-top:0;padding-top:0}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .hero-actions .btn{width:100%}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
  .float-cta{padding:10px 14px calc(10px + env(safe-area-inset-bottom))}
}