/* roulang page: index */
:root{
  --ink-900:#0E1512;
  --ink-700:#23302B;
  --ink-500:#4A5A54;
  --ink-300:#8A9791;
  --accent:#16C08A;
  --accent-dark:#12A876;
  --sand:#D9B48F;
  --danger:#C0392B;
  --bg:#F7F6F2;
  --surface:#FFFFFF;
  --surface-2:#EFEDE6;
  --line:#E4E2DA;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --shadow-1:0 1px 2px rgba(14,21,18,.04),0 8px 24px rgba(14,21,18,.06);
  --shadow-2:0 16px 40px rgba(14,21,18,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-sans:'Noto Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  --font-serif:'Noto Serif SC','Source Han Serif SC','Songti SC','SimSun',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:16.5px;
  line-height:1.75;
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit;color:inherit}
button{border:0;background:none;cursor:pointer}
h1,h2,h3,h4{
  margin:0;
  font-family:var(--font-serif);
  color:var(--ink-900);
  line-height:1.22;
  letter-spacing:-.01em;
  font-weight:700;
}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
time,.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 40px}
.section{padding:104px 0}
.section-alt{background:var(--surface-2)}
.section-head{max-width:720px;margin-bottom:52px}
.section-head h2{font-size:clamp(24px,3vw,32px)}
.section-head p{margin-top:14px;color:var(--ink-500);font-size:16px}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 顶部细条 ---------- */
.topbar{background:var(--ink-900);color:rgba(255,255,255,.78);font-size:13px}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:36px}
.topbar-note{display:flex;align-items:center;gap:8px}
.topbar-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);flex:0 0 6px}
.topbar-right{display:flex;align-items:center;gap:16px}
.topbar a{color:#fff;border-bottom:1px solid rgba(22,192,138,.7);padding-bottom:1px}
.topbar a:hover{color:var(--accent)}
.topbar-close{color:rgba(255,255,255,.5);font-size:16px;line-height:1;padding:4px}
.topbar-close:hover{color:#fff}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,242,.84);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header.is-scrolled{background:rgba(255,255,255,.95);border-bottom-color:var(--line);box-shadow:0 8px 24px rgba(14,21,18,.06)}
.nav-wrap{display:flex;align-items:center;height:72px;gap:28px}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto}
.brand-mark{position:relative;width:26px;height:26px;border-radius:7px;background:var(--ink-900);transition:transform .3s var(--ease)}
.brand-mark::after{content:"";position:absolute;left:6px;right:6px;top:50%;height:3px;border-radius:2px;background:var(--accent);transform:translateY(-50%) rotate(-12deg)}
.brand:hover .brand-mark{transform:rotate(6deg)}
.brand-text{font-size:19px;font-weight:700;color:var(--ink-900);letter-spacing:.01em}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:18px}
.nav-link{position:relative;padding:9px 14px;font-size:15px;font-weight:500;color:var(--ink-500);border-radius:8px;transition:color .18s var(--ease)}
.nav-link::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)}
.nav-link:hover{color:var(--ink-900)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink-900);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:14px;margin-left:auto}
.mega{position:relative}
.mega-btn{display:inline-flex;align-items:center;gap:6px;padding:9px 12px;border-radius:8px;font-size:15px;font-weight:500;color:var(--ink-500);transition:color .18s var(--ease),background .18s var(--ease)}
.mega-btn:hover{color:var(--ink-900);background:rgba(14,21,18,.04)}
.mega-btn .chev{font-size:11px;transition:transform .2s var(--ease)}
.mega[data-open="true"] .mega-btn .chev{transform:rotate(180deg)}
.mega-panel{
  position:absolute;top:calc(100% + 14px);right:0;width:760px;
  display:grid;grid-template-columns:1fr 1fr 1.05fr;gap:26px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-2);padding:28px;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.mega[data-open="true"] .mega-panel{opacity:1;visibility:visible;transform:none}
.mega-title{font-size:12px;letter-spacing:.12em;color:var(--ink-300);margin-bottom:14px;font-weight:600}
.mega-col a{display:block;padding:8px 0;font-size:14.5px;color:var(--ink-700);border-bottom:1px solid transparent;transition:color .18s var(--ease),padding-left .18s var(--ease)}
.mega-col a:hover{color:var(--accent-dark);padding-left:6px}
.mega-card{background:var(--ink-900);border-radius:var(--r-md);padding:22px;color:rgba(255,255,255,.72);display:flex;flex-direction:column;align-items:flex-start;gap:10px}
.mega-card strong{color:#fff;font-size:16px;font-family:var(--font-serif)}
.mega-card span{font-size:13.5px;line-height:1.7}
.mega-card .btn{margin-top:4px;height:42px;padding:0 18px;font-size:14px}
.nav-toggle{display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);align-items:center;justify-content:center;flex-direction:column;gap:4px}
.nav-toggle span{display:block;width:16px;height:1.5px;background:var(--ink-900);transition:transform .24s var(--ease),opacity .2s var(--ease)}
body.nav-open .nav-toggle span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
body.nav-open .nav-toggle span:nth-child(2){opacity:0}
body.nav-open .nav-toggle span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}
.nav-mask{position:fixed;inset:0;background:rgba(14,21,18,.42);opacity:0;visibility:hidden;transition:opacity .28s var(--ease),visibility .28s;z-index:50}
body.nav-open .nav-mask{opacity:1;visibility:visible}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:10px;
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn .arrow{transition:transform .18s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.btn-primary{background:var(--ink-900);color:#fff}
.btn-primary:hover{background:#050806;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-accent{background:var(--accent);color:var(--ink-900)}
.btn-accent:hover{background:var(--accent-dark);color:#fff;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--ink-700);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--ink-900);color:var(--ink-900)}
.btn-block{width:100%}
.link-more{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--accent-dark)}
.link-more::after{content:"→";transition:transform .18s var(--ease)}
.link-more:hover::after{transform:translateX(4px)}

/* ---------- Hero ---------- */
.hero{padding:76px 0 84px;position:relative}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.eyebrow{position:relative;padding-left:34px;font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--accent-dark);margin-bottom:22px}
.eyebrow::before{content:"";position:absolute;left:0;top:50%;width:24px;height:2px;background:var(--accent);transform:translateY(-50%)}
.hero h1{font-size:clamp(34px,4.4vw,56px);letter-spacing:-.02em}
.hero-sub{margin-top:20px;font-size:17px;color:var(--ink-500);max-width:32ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.trust-row{display:flex;flex-wrap:wrap;gap:0;margin-top:40px}
.trust-row li{padding:0 20px;font-size:13.5px;color:var(--ink-500);border-left:1px solid var(--line)}
.trust-row li:first-child{padding-left:0;border-left:0}
.hero-visual{position:relative}
.hero-visual img{width:100%;aspect-ratio:5/4;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--shadow-1)}
.hero-visual::after{content:"";position:absolute;inset:0;border-radius:var(--r-lg);background:linear-gradient(180deg,rgba(14,21,18,.04),rgba(14,21,18,.24));pointer-events:none}
.float-card{
  position:absolute;right:-14px;bottom:-22px;width:270px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-2);padding:18px 20px;display:flex;align-items:center;gap:16px;
}
.float-card .num{font-family:var(--font-serif);font-size:38px;line-height:1;color:var(--accent-dark)}
.float-card p{font-size:13.5px;color:var(--ink-500);line-height:1.5}

/* ---------- 信任条 ---------- */
.trustbar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:30px 0}
.trustbar-grid{display:grid;grid-template-columns:repeat(5,1fr)}
.trustbar-item{padding:0 22px;border-left:1px solid var(--line)}
.trustbar-item:first-child{padding-left:0;border-left:0}
.trustbar-item strong{display:block;font-size:15px;color:var(--ink-900);font-weight:600;margin-bottom:6px}
.trustbar-item span{font-size:13.5px;color:var(--ink-300);line-height:1.6}

/* ---------- 步骤 ---------- */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr)}
.step{padding:0 34px;border-left:1px solid var(--line)}
.step:first-child{padding-left:0;border-left:0}
.step-num{font-family:var(--font-serif);font-size:46px;line-height:1;color:var(--accent);display:block;margin-bottom:18px}
.step h3{font-size:19px;margin-bottom:10px}
.step p{font-size:15px;color:var(--ink-500);line-height:1.75;max-width:34ch}
.step .link-more{margin-top:16px}

/* ---------- 功能格 ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:26px 24px;transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(14,21,18,.2)}
.feature-icon{width:38px;height:38px;border-radius:11px;background:rgba(22,192,138,.12);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.feature-icon svg{width:20px;height:20px;stroke:var(--accent-dark);fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.feature-card h3{font-size:17px;margin-bottom:10px}
.feature-card p{font-size:14.5px;color:var(--ink-500);line-height:1.7}

/* ---------- 案例交替图文 ---------- */
.case-row{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.case-row + .case-row{margin-top:84px}
.case-row.reverse .case-media{order:2}
.case-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--shadow-1)}
.case-tag{display:inline-block;font-size:12px;letter-spacing:.1em;font-weight:600;color:var(--accent-dark);background:rgba(22,192,138,.12);border-radius:999px;padding:5px 14px;margin-bottom:18px}
.case-body h3{font-size:clamp(22px,2.4vw,28px);margin-bottom:16px}
.case-body p{font-size:15.5px;color:var(--ink-500);line-height:1.85;max-width:46ch}
.case-stats{display:flex;gap:44px;margin:26px 0 22px}
.case-stats b{display:block;font-family:var(--font-serif);font-size:27px;color:var(--ink-900);line-height:1.1}
.case-stats span{font-size:13px;color:var(--ink-300)}

/* ---------- CMS 列表 ---------- */
.list-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:44px}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(14,21,18,.2)}
.post-thumb{position:relative;overflow:hidden}
.post-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .32s var(--ease)}
.post-card:hover .post-thumb img{transform:scale(1.03)}
.post-thumb::after{content:"";position:absolute;inset:0;background:rgba(14,21,18,0);transition:background .24s var(--ease)}
.post-card:hover .post-thumb::after{background:rgba(14,21,18,.18)}
.post-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.chip{
  align-self:flex-start;font-size:12px;letter-spacing:.1em;font-weight:600;
  color:var(--accent-dark);border:1px solid rgba(22,192,138,.45);border-radius:999px;padding:3px 11px;
}
.post-body h3{font-size:18px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-body p{font-size:14.5px;color:var(--ink-500);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:12px;border-top:1px solid var(--line);font-size:13px;color:var(--ink-300)}
.empty-state{
  background:var(--surface-2);border:1px dashed var(--line);border-radius:var(--r-md);
  padding:48px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:14px;
}
.empty-state svg{width:48px;height:48px;stroke:var(--ink-300);fill:none;stroke-width:1.2;stroke-linecap:round;stroke-linejoin:round}
.empty-state strong{font-size:16px;color:var(--ink-900);font-family:var(--font-serif)}
.empty-state p{font-size:14.5px;color:var(--ink-500)}

/* ---------- FAQ ---------- */
.faq{max-width:840px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:24px;padding:22px 0;text-align:left;font-size:17px;font-weight:600;color:var(--ink-900);transition:color .18s var(--ease)}
.faq-q:hover{color:var(--accent-dark)}
.faq-icon{position:relative;flex:0 0 22px;width:22px;height:22px;border:1.5px solid var(--line);border-radius:50%;margin-top:3px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--ink-700);transform:translate(-50%,-50%)}
.faq-icon::before{width:10px;height:1.5px}
.faq-icon::after{width:1.5px;height:10px;transition:transform .24s var(--ease)}
.faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .34s var(--ease)}
.faq-item.is-open .faq-a{max-height:400px}
.faq-a p{padding:0 46px 22px 0;font-size:15.5px;line-height:1.8;color:var(--ink-500)}

/* ---------- CTA ---------- */
.cta{position:relative;background:var(--ink-900);color:#fff;overflow:hidden}
.cta::before{content:"";position:absolute;inset:0;background:radial-gradient(620px 320px at 86% 6%,rgba(22,192,138,.16),transparent 72%);pointer-events:none}
.cta-grid{position:relative;display:grid;grid-template-columns:1fr 1.05fr;gap:64px;align-items:start}
.cta h2{color:#fff;font-size:clamp(24px,2.9vw,32px)}
.cta-lead{margin-top:16px;font-size:15.5px;color:rgba(255,255,255,.72);line-height:1.85;max-width:40ch}
.cta-points{margin-top:28px;display:flex;flex-direction:column;gap:12px}
.cta-points li{display:flex;gap:12px;align-items:flex-start;font-size:14.5px;color:rgba(255,255,255,.78)}
.cta-points li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);margin-top:8px;flex:0 0 6px}
.form-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:var(--r-lg);padding:32px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1 / -1}
.field label{font-size:13.5px;font-weight:500;color:rgba(255,255,255,.8)}
.field input,.field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);
  color:#fff;font-size:15px;transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field textarea{height:auto;min-height:96px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.4)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(22,192,138,.14)}
.form-card .btn{margin-top:22px}
.form-note{margin-top:14px;font-size:13px;color:rgba(255,255,255,.5)}
.form-success{display:none;align-items:center;gap:12px;padding:18px;border-radius:var(--r-sm);background:rgba(22,192,138,.12);border:1px solid rgba(22,192,138,.34);color:#fff;font-size:14.5px}
.form-success svg{width:20px;height:20px;stroke:var(--accent);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex:0 0 20px}
.form-card.is-sent .form-body{display:none}
.form-card.is-sent .form-success{display:flex}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.7);padding:76px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:48px}
.footer-brand{display:flex;align-items:center;gap:11px;margin-bottom:18px}
.footer-brand .brand-mark{background:#fff}
.footer-brand .brand-mark::after{background:var(--accent)}
.footer-brand span{font-size:18px;font-weight:700;color:#fff}
.footer-about{font-size:14px;line-height:1.85;max-width:34ch}
.footer-col h4{font-size:13px;letter-spacing:.1em;color:rgba(255,255,255,.55);font-family:var(--font-sans);font-weight:600;margin-bottom:18px}
.footer-col a{display:block;font-size:14px;padding:6px 0;color:rgba(255,255,255,.72);transition:color .18s var(--ease),padding-left .18s var(--ease)}
.footer-col a:hover{color:var(--accent);padding-left:5px}
.footer-bottom{margin-top:64px;border-top:1px solid rgba(255,255,255,.12);padding:24px 0 32px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5)}
.back-top{
  position:fixed;right:28px;bottom:28px;width:44px;height:44px;border-radius:50%;
  background:var(--ink-900);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow-2);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s,background .18s var(--ease);
  z-index:45;font-size:15px;
}
.back-top.is-visible{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:var(--accent);color:var(--ink-900)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1040px;padding:0 32px}
  .hero-grid{gap:40px}
  .mega-panel{width:680px}
}
@media (max-width:1023px){
  .section{padding:72px 0}
  .main-nav{display:none}
  .nav-toggle{display:flex}
  .mega{display:none}
  .main-nav{
    display:flex;position:fixed;top:0;right:0;bottom:0;width:min(320px,84vw);
    flex-direction:column;align-items:stretch;gap:0;margin:0;
    background:var(--surface);padding:92px 22px 32px;z-index:55;
    transform:translateX(102%);transition:transform .32s var(--ease);
    box-shadow:-16px 0 40px rgba(14,21,18,.12);overflow-y:auto;
  }
  body.nav-open .main-nav{transform:none}
  .nav-link{padding:15px 4px;font-size:16px;border-bottom:1px solid var(--line)}
  .nav-link::after{left:4px;right:auto;width:24px;bottom:0}
  .hero{padding:56px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-sub{max-width:none}
  .hero-visual{max-width:560px}
  .float-card{right:12px;bottom:-18px;width:240px}
  .trustbar-grid{grid-template-columns:repeat(2,1fr);gap:22px 0}
  .trustbar-item{border-left:0;padding:0}
  .trustbar-item:nth-child(odd){border-right:1px solid var(--line);padding-right:20px}
  .trustbar-item:nth-child(even){padding-left:20px}
  .steps-grid{grid-template-columns:1fr;gap:34px}
  .step{padding:0 0 0 26px;border-left:1px solid var(--line)}
  .step:first-child{border-left:1px solid var(--line);padding-left:26px}
  .step p{max-width:none}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .case-row{grid-template-columns:1fr;gap:32px}
  .case-row.reverse .case-media{order:0}
  .case-row + .case-row{margin-top:64px}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .cta-grid{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .section{padding:56px 0}
  .topbar-note span:last-child{display:none}
  .nav-wrap{height:64px;gap:16px}
  .brand-text{font-size:17px}
  .nav-right .btn-primary{display:none}
  .hero h1{font-size:clamp(30px,7vw,38px)}
  .hero-visual img{aspect-ratio:4/3}
  .float-card{width:210px;padding:14px 16px;gap:12px}
  .float-card .num{font-size:30px}
  .trust-row li{padding:0 12px;font-size:12.5px}
  .trust-row li:first-child{padding-left:0}
  .section-head{margin-bottom:36px}
  .feature-grid{grid-template-columns:1fr}
  .post-grid{grid-template-columns:1fr}
  .list-head{flex-direction:column;align-items:flex-start;gap:12px}
  .case-stats{gap:32px}
  .faq-a p{padding-right:0}
  .form-grid{grid-template-columns:1fr}
  .form-card{padding:24px}
  .footer-grid{grid-template-columns:1fr;gap:34px}
  .site-footer{padding-top:56px}
  .back-top{right:16px;bottom:16px}
}
@media (max-width:419px){
  .hero-actions .btn{width:100%}
  .btn{padding:0 18px}
  .case-stats{flex-wrap:wrap;gap:22px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1!important;transform:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --ink-900:#0E1512;
  --ink-700:#23302B;
  --ink-500:#4A5A54;
  --ink-300:#8A9791;
  --accent:#16C08A;
  --accent-deep:#12A876;
  --sand:#D9B48F;
  --danger:#C0392B;
  --bg:#F7F6F2;
  --surface:#FFFFFF;
  --surface-2:#EFEDE6;
  --line:#E4E2DA;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --shadow-1:0 1px 2px rgba(14,21,18,.04), 0 8px 24px rgba(14,21,18,.06);
  --shadow-2:0 16px 40px rgba(14,21,18,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --serif:'Noto Serif SC','Source Han Serif SC','Songti SC',Georgia,'Times New Roman',serif;
  --sans:'Noto Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',system-ui,-apple-system,'Segoe UI',sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-700);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding-left:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 40px}
.num{font-variant-numeric:tabular-nums}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn .arw{transition:transform .18s var(--ease)}
.btn:hover .arw{transform:translateX(4px)}
.btn-primary{background:var(--ink-900);color:#fff}
.btn-primary:hover{background:#1b2621;box-shadow:var(--shadow-1)}
.btn-accent{background:var(--accent);color:var(--ink-900)}
.btn-accent:hover{background:var(--accent-deep)}
.btn-ghost{background:transparent;color:var(--ink-900);box-shadow:inset 0 0 0 1px var(--line)}
.btn-ghost:hover{box-shadow:inset 0 0 0 1px rgba(14,21,18,.28);background:var(--surface)}
.btn:active{transform:translateY(1px)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,242,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(255,255,255,.96);
  border-bottom-color:var(--line);
  box-shadow:0 6px 22px rgba(14,21,18,.05);
}
.nav-wrap{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  position:relative;width:26px;height:26px;border-radius:7px;background:var(--ink-900);
  overflow:hidden;display:inline-block;flex:0 0 auto;
  transition:transform .3s var(--ease);
}
.brand-mark::after{
  content:"";position:absolute;right:-7px;bottom:-7px;width:17px;height:17px;
  background:var(--accent);border-radius:4px;transform:rotate(45deg);
}
.brand:hover .brand-mark{transform:rotate(6deg)}
.brand-text{font-size:19px;font-weight:700;letter-spacing:-.01em;color:var(--ink-900)}
.main-nav{display:flex;align-items:center;gap:4px;margin:0 auto}
.nav-link{
  position:relative;padding:9px 13px;font-size:15px;font-weight:500;color:var(--ink-500);
  transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left center;
  transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--ink-900)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink-900);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.mega{position:relative}
.mega-btn{
  display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 12px;border-radius:var(--r-sm);
  font-size:15px;font-weight:500;color:var(--ink-500);transition:color .18s var(--ease),background-color .18s var(--ease);
}
.mega-btn:hover{color:var(--ink-900);background:var(--surface-2)}
.mega-btn .chev{font-size:11px;transition:transform .2s var(--ease)}
.mega[data-open="true"] .mega-btn{color:var(--ink-900);background:var(--surface-2)}
.mega[data-open="true"] .mega-btn .chev{transform:rotate(180deg)}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 12px);width:760px;
  display:grid;grid-template-columns:1fr 1fr 260px;gap:26px;
  padding:26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-2);
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease);
}
.mega[data-open="true"] .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-title{font-size:13px;letter-spacing:.1em;color:var(--ink-300);font-weight:600;margin-bottom:10px}
.mega-col a{
  display:block;padding:9px 0;font-size:14.5px;color:var(--ink-700);
  border-bottom:1px solid var(--line);transition:color .16s var(--ease),padding-left .16s var(--ease);
}
.mega-col a:last-child{border-bottom:0}
.mega-col a:hover{color:var(--ink-900);padding-left:5px}
.mega-card{
  display:flex;flex-direction:column;gap:10px;justify-content:center;
  padding:22px;border-radius:var(--r-md);background:var(--ink-900);color:#fff;
  box-shadow:inset 0 0 0 1px rgba(22,192,138,.35);
}
.mega-card strong{font-size:15.5px;font-weight:600}
.mega-card span{font-size:13px;line-height:1.65;color:rgba(255,255,255,.7)}
.mega-card .btn{height:40px;margin-top:6px;font-size:14px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:var(--r-sm);
  box-shadow:inset 0 0 0 1px var(--line);background:var(--surface);
  flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-900);transition:transform .2s var(--ease),opacity .2s var(--ease)}

/* ---------- 面包屑 ---------- */
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13.5px;color:var(--ink-300);padding-top:32px;
}
.crumb a{color:var(--ink-300);transition:color .16s var(--ease)}
.crumb a:hover{color:var(--ink-900)}
.crumb .sep{color:#c6c3b9}
.crumb .cur{color:var(--ink-900);font-weight:500;max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ---------- 文章头部 ---------- */
.article-hero{padding-bottom:38px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#FBFAF7 0%,var(--bg) 100%)}
.article-hero .container{max-width:880px}
.article-title{
  font-family:var(--serif);font-weight:700;color:var(--ink-900);
  font-size:clamp(30px,3.6vw,44px);line-height:1.22;letter-spacing:-.02em;
  margin:26px 0 20px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:13.5px;color:var(--ink-300)}
.chip{
  display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 11px;border-radius:999px;
  font-size:12px;letter-spacing:.1em;font-weight:600;color:var(--accent-deep);
  box-shadow:inset 0 0 0 1px rgba(22,192,138,.55);background:rgba(22,192,138,.06);
}
.meta-item{position:relative;padding-left:0}
.meta-item + .meta-item::before{content:"";position:absolute;left:-10px;top:50%;width:1px;height:12px;background:var(--line);transform:translateY(-50%)}

/* ---------- 文章布局 ---------- */
.article-section{padding:56px 0 24px}
.article-layout{
  display:grid;grid-template-columns:minmax(0,780px) 240px;gap:56px;
  justify-content:center;align-items:start;
}
.article-main{min-width:0}
.article-body{font-size:16.5px;line-height:1.9;color:var(--ink-700)}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 22px}
.article-body h2{
  font-family:var(--serif);font-weight:700;color:var(--ink-900);
  font-size:clamp(22px,2.2vw,27px);line-height:1.35;letter-spacing:-.01em;
  margin:56px 0 18px;padding-left:14px;border-left:3px solid var(--accent);
}
.article-body h3{
  font-family:var(--serif);font-weight:700;color:var(--ink-900);
  font-size:20px;line-height:1.4;margin:38px 0 14px;
}
.article-body h4{font-size:17px;font-weight:600;color:var(--ink-900);margin:30px 0 12px}
.article-body ul,.article-body ol{margin:0 0 24px;padding-left:24px}
.article-body li{margin-bottom:10px}
.article-body ul{list-style:square}
.article-body ul li::marker{color:var(--accent)}
.article-body ol li::marker{color:var(--accent-deep);font-weight:600}
.article-body a{color:var(--accent-deep);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
.article-body a:hover{color:var(--ink-900)}
.article-body img{border-radius:var(--r-md);margin:30px 0;box-shadow:var(--shadow-1)}
.article-body blockquote{
  margin:30px 0;padding:20px 24px;background:var(--surface-2);
  border-left:3px solid var(--sand);border-radius:0 var(--r-md) var(--r-md) 0;color:var(--ink-700);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{
  width:100%;border-collapse:collapse;font-size:15px;margin:28px 0;
  display:block;overflow-x:auto;white-space:nowrap;
}
.article-body th,.article-body td{padding:12px 16px;text-align:left;border:0;border-bottom:1px solid var(--line)}
.article-body th{background:var(--surface-2);color:var(--ink-900);font-weight:600}
.article-body code{padding:2px 6px;border-radius:6px;background:var(--surface-2);font-size:14.5px}
.article-body hr{border:0;border-top:1px solid var(--line);margin:44px 0}

.article-empty{
  padding:48px;border-radius:var(--r-md);background:var(--surface-2);border:1px solid var(--line);
  display:flex;flex-direction:column;gap:14px;align-items:flex-start;
}
.article-empty .empty-icon{
  width:48px;height:48px;border-radius:50%;display:grid;place-items:center;
  background:var(--surface);box-shadow:inset 0 0 0 1.5px var(--ink-300);color:var(--ink-500);font-size:20px;
}
.article-empty h2{font-family:var(--serif);font-size:22px;color:var(--ink-900)}
.article-empty p{font-size:15px;color:var(--ink-500);margin:0}

/* ---------- 文章脚部 ---------- */
.article-foot{margin-top:52px;padding-top:26px;border-top:1px solid var(--line)}
.tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px}
.tag{
  height:28px;padding:0 13px;display:inline-flex;align-items:center;border-radius:999px;
  font-size:12px;letter-spacing:.06em;color:var(--ink-500);
  background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);
  transition:color .16s var(--ease),box-shadow .16s var(--ease);
}
.tag:hover{color:var(--ink-900);box-shadow:inset 0 0 0 1px rgba(14,21,18,.28)}
.foot-actions{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between}
.icon-actions{display:flex;gap:10px}
.icon-btn{
  width:40px;height:40px;border-radius:50%;display:grid;place-items:center;
  background:var(--surface);box-shadow:inset 0 0 0 1px var(--line);color:var(--ink-500);
  transition:color .16s var(--ease),transform .16s var(--ease),box-shadow .16s var(--ease);
}
.icon-btn:hover{color:var(--accent-deep);transform:translateY(-2px);box-shadow:inset 0 0 0 1px rgba(22,192,138,.5)}
.icon-btn svg{width:18px;height:18px}
.foot-note{font-size:13px;color:var(--ink-300)}

/* ---------- 侧边目录 ---------- */
.article-aside{position:sticky;top:96px}
.toc{border-left:1px solid var(--line);padding-left:18px}
.toc-title{font-size:13px;letter-spacing:.1em;color:var(--ink-300);font-weight:600;margin-bottom:12px}
.toc-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.toc-list a{
  display:block;padding:5px 0 5px 10px;font-size:13.5px;color:var(--ink-500);
  border-left:2px solid transparent;margin-left:-19px;padding-left:17px;
  transition:color .16s var(--ease),border-color .16s var(--ease);
}
.toc-list a:hover{color:var(--ink-900)}
.toc-list a.is-current{color:var(--ink-900);font-weight:600;border-left-color:var(--accent)}

/* ---------- 相关推荐 ---------- */
.related{padding:72px 0 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}
.sec-head h2{
  font-family:var(--serif);font-weight:700;color:var(--ink-900);
  font-size:clamp(24px,2.4vw,30px);letter-spacing:-.01em;line-height:1.3;
}
.sec-head p{font-size:14.5px;color:var(--ink-500);margin-top:8px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.rel-card{
  display:flex;gap:16px;padding:16px;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-md);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.rel-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(14,21,18,.2)}
.rel-thumb{flex:0 0 96px;width:96px;height:96px;border-radius:var(--r-sm);overflow:hidden;background:var(--surface-2)}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.rel-card:hover .rel-thumb img{transform:scale(1.06)}
.rel-text{display:flex;flex-direction:column;gap:8px;min-width:0}
.rel-text strong{font-size:15.5px;font-weight:600;color:var(--ink-900);line-height:1.5}
.rel-text em{font-style:normal;font-size:13.5px;line-height:1.7;color:var(--ink-500)}
.rel-more{font-size:12.5px;color:var(--accent-deep);letter-spacing:.06em}
.back-links{display:flex;flex-wrap:wrap;gap:26px;margin-top:30px;font-size:14.5px}
.back-links a{color:var(--ink-500);position:relative;padding-bottom:2px;transition:color .16s var(--ease)}
.back-links a::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;background:var(--ink-900);
  transform:scaleX(0);transform-origin:left center;transition:transform .22s var(--ease);
}
.back-links a:hover{color:var(--ink-900)}
.back-links a:hover::after{transform:scaleX(1)}

/* ---------- CTA 卡片 ---------- */
.cta-section{padding:80px 0 96px}
.cta-card{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  padding:52px 56px;display:flex;flex-wrap:wrap;gap:32px;align-items:center;justify-content:space-between;
  background:var(--ink-900);
}
.cta-card::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(115deg,rgba(22,192,138,.14) 0%,rgba(22,192,138,0) 52%),url(/assets/images/backpic/back-2.png);
  background-size:cover,cover;background-position:center,center;opacity:.5;pointer-events:none;
}
.cta-card > *{position:relative;z-index:1}
.cta-copy{max-width:560px}
.cta-copy h2{
  font-family:var(--serif);font-weight:700;color:#fff;font-size:clamp(24px,2.6vw,32px);
  line-height:1.3;letter-spacing:-.01em;
}
.cta-copy p{margin-top:14px;font-size:15.5px;line-height:1.8;color:rgba(255,255,255,.72)}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}
.cta-actions .btn-ghost{color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.32)}
.cta-actions .btn-ghost:hover{background:rgba(255,255,255,.08);box-shadow:inset 0 0 0 1px rgba(255,255,255,.6)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.7);padding:72px 0 30px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:18px;font-weight:700;margin-bottom:16px}
.footer-brand .brand-mark{box-shadow:inset 0 0 0 1px rgba(255,255,255,.2)}
.footer-about{font-size:14px;line-height:1.85;color:rgba(255,255,255,.66);max-width:34ch}
.footer-col h4{font-size:13px;letter-spacing:.1em;color:rgba(255,255,255,.92);font-weight:600;margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:rgba(255,255,255,.7);padding:6px 0;transition:color .16s var(--ease),padding-left .16s var(--ease)}
.footer-col a:hover{color:#fff;padding-left:4px}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- 回到顶部 ---------- */
.back-top{
  position:fixed;right:24px;bottom:28px;width:44px;height:44px;border-radius:50%;z-index:70;
  display:grid;place-items:center;background:var(--surface);color:var(--ink-700);
  box-shadow:inset 0 0 0 1px var(--line),var(--shadow-1);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s var(--ease);
}
.back-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{color:var(--accent-deep)}

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

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .article-layout{grid-template-columns:minmax(0,1fr);justify-content:center}
  .article-main{max-width:820px;margin:0 auto}
  .article-aside{display:none}
  .container{padding:0 24px}
}
@media (max-width:1023px){
  .main-nav{
    position:fixed;left:0;right:0;top:64px;z-index:55;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--surface);border-bottom:1px solid var(--line);
    box-shadow:var(--shadow-1);padding:10px 20px 18px;
    display:none;
  }
  .main-nav.is-open{display:flex}
  .nav-link{padding:13px 4px;font-size:16px;border-bottom:1px solid var(--line)}
  .nav-link::after{display:none}
  .nav-link.is-active{color:var(--accent-deep)}
  .nav-toggle{display:flex}
  .nav-wrap{height:64px;gap:14px}
  .mega-panel{width:min(92vw,520px);grid-template-columns:1fr;gap:18px;padding:20px}
  .mega-card{display:none}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-card{padding:40px 32px}
}
@media (max-width:768px){
  .article-hero .container,.container{padding:0 20px}
  .crumb{padding-top:22px}
  .article-title{margin:20px 0 16px}
  .article-section{padding:40px 0 16px}
  .related{padding:52px 0 0}
  .cta-section{padding:60px 0 72px}
  .cta-card{padding:32px 24px;gap:24px}
  .rel-card{flex-direction:row}
  .meta-item + .meta-item::before{display:none}
  .meta-row{gap:10px 14px}
  .site-footer{padding:56px 0 26px}
}
@media (max-width:600px){
  .mega{display:none}
  .nav-right .btn-primary{display:none}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .article-body{font-size:16px;line-height:1.85}
  .article-body h2{margin-top:42px}
}
@media (max-width:420px){
  .article-hero .container,.container{padding:0 16px}
  .btn{width:100%}
  .cta-actions,.foot-actions{width:100%}
  .icon-actions{width:100%;justify-content:flex-start}
  .rel-thumb{flex:0 0 76px;width:76px;height:76px}
  .back-top{right:16px;bottom:18px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category1 */
:root{
  --ink-900:#0E1512;
  --ink-700:#23302B;
  --ink-500:#4A5A54;
  --ink-300:#8A9791;
  --accent:#16C08A;
  --accent-dark:#12A876;
  --sand:#D9B48F;
  --bg:#F7F6F2;
  --surface:#FFFFFF;
  --surface-2:#EFEDE6;
  --line:#E4E2DA;
  --danger:#C0392B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --shadow-1:0 1px 2px rgba(14,21,18,.04),0 8px 24px rgba(14,21,18,.06);
  --shadow-2:0 16px 40px rgba(14,21,18,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink-700);
  font-family:var(--sans);font-size:16.5px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer;padding:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-family:var(--serif);color:var(--ink-900);font-weight:700;letter-spacing:-.015em;line-height:1.2}
p{margin:0}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
::selection{background:rgba(22,192,138,.22)}

/* ---------- 布局容器 ---------- */
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 40px}
.sec{padding:104px 0}
.sec--alt{background:var(--surface-2)}
.sec-head{display:flex;justify-content:space-between;align-items:flex-end;gap:28px;flex-wrap:wrap;margin-bottom:44px}
.sec-head h2{font-size:clamp(26px,3vw,34px);max-width:660px}
.sec-head .sec-sub{margin-top:12px;color:var(--ink-500);font-size:16px;max-width:600px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12.5px;letter-spacing:.14em;color:var(--ink-500);text-transform:uppercase;font-weight:500}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent)}
.link-more{display:inline-flex;align-items:center;gap:8px;font-size:14.5px;font-weight:600;color:var(--ink-900);padding-bottom:2px;border-bottom:1px solid var(--line);transition:border-color .18s var(--ease),color .18s var(--ease)}
.link-more:hover{border-color:var(--ink-900);color:var(--accent-dark)}
.link-more .arw{transition:transform .18s var(--ease)}
.link-more:hover .arw{transform:translateX(4px)}

/* ---------- 按钮 / 标签 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;height:48px;padding:0 22px;border-radius:var(--r-sm);font-size:15px;font-weight:600;line-height:1;transition:background-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease)}
.btn .arw{transition:transform .18s var(--ease)}
.btn:hover .arw{transform:translateX(4px)}
.btn-primary{background:var(--ink-900);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:#16211C;transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0)}
.btn-accent{background:var(--accent);color:var(--ink-900)}
.btn-accent:hover{background:var(--accent-dark);transform:translateY(-2px)}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--ink-700)}
.btn-ghost:hover{border-color:var(--ink-900);background:rgba(14,21,18,.03)}
.btn-block{width:100%}
.chip{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 11px;border-radius:999px;border:1px solid rgba(22,192,138,.5);color:#0F7C58;font-size:12px;letter-spacing:.1em;font-weight:500;background:rgba(22,192,138,.07)}
.chip--sand{border-color:rgba(217,180,143,.75);color:#8A6135;background:rgba(217,180,143,.14)}

/* ---------- 顶部细条 ---------- */
.topbar{background:var(--ink-900);color:rgba(255,255,255,.82);font-size:13.5px}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px;padding-top:6px;padding-bottom:6px}
.topbar a{color:#fff;border-bottom:1px solid rgba(255,255,255,.35);transition:border-color .18s var(--ease)}
.topbar a:hover{border-color:var(--accent)}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(247,246,242,.88);backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:background-color .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease)}
.site-header.is-scrolled{background:rgba(255,255,255,.96);border-bottom-color:var(--line);box-shadow:var(--shadow-1)}
.nav-wrap{display:flex;align-items:center;gap:22px;height:72px}
.brand{display:inline-flex;align-items:center;gap:10px;font-size:18.5px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em;white-space:nowrap}
.brand-mark{position:relative;width:26px;height:26px;border-radius:7px;background:var(--ink-900);transition:transform .24s var(--ease);flex:0 0 auto}
.brand-mark::after{content:"";position:absolute;inset:6px;border-radius:2px;background:var(--accent);clip-path:polygon(0 100%,100% 0,100% 100%)}
.brand:hover .brand-mark{transform:rotate(6deg)}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:14px}
.nav-link{position:relative;padding:9px 13px;font-size:15px;font-weight:500;color:var(--ink-700);border-radius:var(--r-sm);transition:color .18s var(--ease),background-color .18s var(--ease)}
.nav-link::after{content:"";position:absolute;left:13px;right:13px;bottom:1px;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)}
.nav-link:hover{color:var(--ink-900);background:rgba(14,21,18,.04)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink-900);font-weight:600}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:12px}
.mega{position:relative}
.mega-btn{display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 14px;border-radius:var(--r-sm);font-size:15px;font-weight:500;color:var(--ink-700);transition:background-color .18s var(--ease),color .18s var(--ease)}
.mega-btn:hover{background:rgba(14,21,18,.05);color:var(--ink-900)}
.mega-btn .chev{font-size:11px;color:var(--ink-300);transition:transform .24s var(--ease)}
.mega[data-open="true"] .mega-btn{background:rgba(14,21,18,.05);color:var(--ink-900)}
.mega[data-open="true"] .mega-btn .chev{transform:rotate(180deg);color:var(--accent-dark)}
.mega-panel{position:absolute;right:0;top:calc(100% + 14px);width:770px;padding:26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-2);display:grid;grid-template-columns:1fr 1fr 1.15fr;gap:26px;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s var(--ease)}
.mega[data-open="true"] .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col{display:flex;flex-direction:column;gap:4px}
.mega-title{margin:0 0 8px;font-size:12px;letter-spacing:.12em;color:var(--ink-300);font-weight:600}
.mega-col a{padding:8px 10px;border-radius:var(--r-sm);font-size:14.5px;color:var(--ink-700);transition:background-color .18s var(--ease),color .18s var(--ease),padding-left .18s var(--ease)}
.mega-col a:hover{background:var(--surface-2);color:var(--ink-900);padding-left:14px}
.mega-card{display:flex;flex-direction:column;gap:10px;padding:20px;border-radius:var(--r-md);background:var(--ink-900);border:1px solid rgba(22,192,138,.45);color:#fff}
.mega-card strong{font-size:15.5px;letter-spacing:-.01em}
.mega-card span{font-size:13.5px;line-height:1.65;color:rgba(255,255,255,.72)}
.mega-card .btn{margin-top:6px;height:42px}
.nav-toggle{display:none;width:42px;height:42px;border-radius:var(--r-sm);border:1px solid var(--line);align-items:center;justify-content:center;flex-direction:column;gap:5px;transition:border-color .18s var(--ease)}
.nav-toggle span{display:block;width:17px;height:1.8px;background:var(--ink-900);border-radius:2px;transition:transform .24s var(--ease),opacity .2s var(--ease)}
.nav-toggle:hover{border-color:var(--ink-900)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6.8px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6.8px) rotate(-45deg)}

/* ---------- 面包屑 ---------- */
.crumb{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13.5px;color:var(--ink-300);padding-top:26px}
.crumb a{color:var(--ink-300);transition:color .18s var(--ease)}
.crumb a:hover{color:var(--ink-900)}
.crumb .sep{color:var(--line)}
.crumb .cur{color:var(--ink-900);font-weight:600}

/* ---------- Hero ---------- */
.hero{padding:38px 0 96px}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:52px;align-items:center}
.hero h1{font-size:clamp(34px,4.5vw,52px);margin-top:20px;max-width:16em}
.hero-sub{margin-top:20px;max-width:560px;font-size:17px;color:var(--ink-500)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.trust-row{display:flex;flex-wrap:wrap;margin-top:36px}
.trust-row li{display:inline-flex;align-items:center;gap:9px;padding:0 20px;font-size:14px;color:var(--ink-500);border-left:1px solid var(--line)}
.trust-row li:first-child{padding-left:0;border-left:0}
.trust-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex:0 0 auto}
.hero-media{position:relative}
.hero-media img{width:100%;aspect-ratio:16/12;object-fit:cover;border-radius:var(--r-lg);box-shadow:var(--shadow-1)}
.hero-media::after{content:"";position:absolute;inset:0;border-radius:var(--r-lg);background:linear-gradient(180deg,rgba(14,21,18,.06),rgba(14,21,18,.20))}
.hero-float{position:absolute;right:-10px;bottom:-22px;width:272px;padding:18px 20px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-2);z-index:2}
.hero-float .num{font-family:var(--sans);font-variant-numeric:tabular-nums;font-size:30px;font-weight:700;color:var(--ink-900);line-height:1.1}
.hero-float .num em{font-style:normal;font-size:14px;color:var(--ink-300);margin-left:6px;font-weight:500}
.hero-float p{margin-top:6px;font-size:13.5px;color:var(--ink-500);line-height:1.6}

/* ---------- 时间轴 / 流程 ---------- */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);margin-top:8px}
.tl-item{position:relative;padding:30px 24px 34px;border-top:2px solid var(--line);transition:transform .24s var(--ease),background-color .24s var(--ease),border-color .24s var(--ease)}
.tl-item::before{content:"";position:absolute;top:-7px;left:24px;width:12px;height:12px;border-radius:50%;background:var(--surface-2);border:2px solid var(--line);transition:background-color .24s var(--ease),border-color .24s var(--ease),transform .24s var(--ease)}
.tl-item:hover{transform:translateY(-4px);border-top-color:var(--ink-900);background:rgba(255,255,255,.6)}
.tl-item:hover::before{background:var(--accent);border-color:var(--accent);transform:scale(1.1)}
.tl-num{font-family:var(--serif);font-size:clamp(28px,3vw,40px);font-weight:700;color:var(--ink-300);line-height:1;font-variant-numeric:tabular-nums;transition:color .24s var(--ease)}
.tl-item:hover .tl-num{color:var(--accent-dark)}
.tl-item h3{margin-top:16px;font-size:19px}
.tl-item p{margin-top:10px;font-size:14.5px;color:var(--ink-500);line-height:1.72}
.tl-meta{display:inline-flex;align-items:center;gap:7px;margin-top:14px;font-size:13px;color:var(--ink-300);font-variant-numeric:tabular-nums}

/* ---------- 要点清单 + 数据条 ---------- */
.split{display:grid;grid-template-columns:1.55fr .95fr;gap:52px;align-items:start}
.check-list li{display:flex;gap:14px;padding:20px 0;border-bottom:1px solid var(--line)}
.check-list li:first-child{padding-top:0}
.check-mark{flex:0 0 auto;width:22px;height:22px;margin-top:3px;border-radius:6px;background:rgba(22,192,138,.14);position:relative}
.check-mark::after{content:"";position:absolute;left:7px;top:4px;width:6px;height:10px;border:1.8px solid var(--accent-dark);border-top:0;border-left:0;transform:rotate(42deg)}
.check-list h3{font-size:17px}
.check-list p{margin-top:7px;font-size:15px;color:var(--ink-500);line-height:1.75}
.data-panel{background:var(--ink-900);border-radius:var(--r-lg);padding:32px 28px;color:#fff;box-shadow:var(--shadow-1)}
.data-panel .panel-title{font-size:13px;letter-spacing:.12em;color:rgba(255,255,255,.6);font-weight:600}
.data-item{padding:22px 0;border-bottom:1px solid rgba(255,255,255,.12)}
.data-item:last-of-type{border-bottom:0;padding-bottom:6px}
.data-item .num{font-family:var(--sans);font-variant-numeric:tabular-nums;font-size:34px;font-weight:700;color:var(--accent);line-height:1.1}
.data-item .num em{font-style:normal;font-size:14px;color:rgba(255,255,255,.66);margin-left:6px;font-weight:500}
.data-item p{margin-top:8px;font-size:14px;line-height:1.7;color:rgba(255,255,255,.72)}
.data-note{margin-top:22px;padding:16px 18px;border-radius:var(--r-md);background:rgba(255,255,255,.06);border-left:3px solid var(--sand);font-size:13.5px;line-height:1.7;color:rgba(255,255,255,.78)}

/* ---------- 场景卡片 ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scene-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease)}
.scene-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(14,21,18,.2)}
.scene-thumb{position:relative;overflow:hidden;background:var(--surface-2)}
.scene-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .42s var(--ease)}
.scene-card:hover .scene-thumb img{transform:scale(1.03)}
.scene-thumb::after{content:"";position:absolute;inset:0;background:rgba(14,21,18,0);transition:background-color .24s var(--ease)}
.scene-card:hover .scene-thumb::after{background:rgba(14,21,18,.18)}
.scene-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.scene-body h3{font-size:18px}
.scene-body p{font-size:14.5px;color:var(--ink-500);line-height:1.72}
.scene-foot{margin-top:auto;padding-top:12px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-300);font-variant-numeric:tabular-nums}
.scene-foot .arw{color:var(--ink-900);transition:transform .18s var(--ease)}
.scene-card:hover .scene-foot .arw{transform:translateX(4px)}

/* ---------- FAQ ---------- */
.faq{max-width:840px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding:22px 0;text-align:left;font-size:17px;font-weight:600;color:var(--ink-900);transition:color .18s var(--ease)}
.faq-q:hover{color:var(--accent-dark)}
.faq-icon{position:relative;flex:0 0 auto;width:22px;height:22px;margin-top:3px;border-radius:50%;border:1px solid var(--line);transition:transform .24s var(--ease),border-color .24s var(--ease),background-color .24s var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--ink-500);transform:translate(-50%,-50%);transition:background-color .24s var(--ease),opacity .24s var(--ease)}
.faq-icon::before{width:9px;height:1.6px}
.faq-icon::after{width:1.6px;height:9px}
.faq-item.is-open .faq-icon{transform:rotate(90deg);border-color:var(--accent);background:rgba(22,192,138,.1)}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:var(--accent-dark)}
.faq-item.is-open .faq-icon::after{opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a p{padding:0 42px 22px 0;font-size:15.5px;line-height:1.8;color:var(--ink-500)}
.faq-item.is-open .faq-a{max-height:320px}

/* ---------- 通栏 CTA + 表单 ---------- */
.cta-band{position:relative;background:var(--ink-900);color:#fff;padding:80px 0;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:radial-gradient(680px 320px at 88% 8%,rgba(22,192,138,.16),transparent 62%);pointer-events:none}
.cta-grid{position:relative;display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:start}
.cta-band h2{color:#fff;font-size:clamp(26px,3vw,32px);max-width:15em}
.cta-band .cta-lead{margin-top:16px;font-size:15.5px;line-height:1.8;color:rgba(255,255,255,.72);max-width:46ch}
.cta-list{margin-top:26px;display:flex;flex-direction:column;gap:14px}
.cta-list li{display:flex;gap:11px;font-size:14.5px;color:rgba(255,255,255,.82)}
.cta-list li::before{content:"";flex:0 0 auto;width:8px;height:8px;margin-top:8px;border-radius:2px;background:var(--accent)}
.form-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.14);border-radius:var(--r-lg);padding:30px 28px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field--full{grid-column:1 / -1}
.field label{font-size:13.5px;font-weight:500;color:rgba(255,255,255,.86)}
.field input,.field select,.field textarea{width:100%;min-height:48px;padding:12px 14px;border-radius:var(--r-sm);border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);color:#fff;font-size:15px;transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease)}
.field textarea{min-height:96px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.4)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px rgba(22,192,138,.16);background:rgba(255,255,255,.1)}
.field select option{background:var(--ink-900);color:#fff}
.form-foot{grid-column:1 / -1;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:6px}
.form-note{font-size:13px;color:rgba(255,255,255,.55)}
.form-ok{display:none;align-items:center;gap:10px;grid-column:1 / -1;padding:14px 16px;border-radius:var(--r-sm);background:rgba(22,192,138,.14);border:1px solid rgba(22,192,138,.5);color:#DFF7EE;font-size:14px}
.form-ok.is-on{display:flex}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.7);padding:72px 0 30px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px}
.footer-brand{display:inline-flex;align-items:center;gap:10px;color:#fff;font-size:18px;font-weight:700}
.footer-brand .brand-mark{background:#fff}
.footer-about{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.68);max-width:34ch}
.footer-col{display:flex;flex-direction:column;gap:10px}
.footer-col h4{font-family:var(--sans);font-size:13px;letter-spacing:.1em;color:rgba(255,255,255,.92);font-weight:600}
.footer-col a{font-size:14px;color:rgba(255,255,255,.7);transition:color .18s var(--ease),padding-left .18s var(--ease)}
.footer-col a:hover{color:#fff;padding-left:4px}
.footer-bottom{margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5)}

/* ---------- 回到顶部 ---------- */
.to-top{position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;background:var(--ink-900);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-2);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease),background-color .18s var(--ease);z-index:70}
.to-top.is-on{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--accent-dark)}

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

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .container{max-width:1040px}
  .mega-panel{width:680px;grid-template-columns:1fr 1fr;gap:22px}
  .mega-card{grid-column:1 / -1}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .sec{padding:72px 0}
  .nav-wrap{height:64px;gap:14px}
  .main-nav{position:fixed;left:0;right:0;top:64px;flex-direction:column;align-items:stretch;gap:2px;margin:0;padding:14px 24px 20px;background:var(--surface);border-bottom:1px solid var(--line);box-shadow:var(--shadow-1);display:none;max-height:calc(100vh - 64px);overflow:auto}
  .main-nav.is-open{display:flex}
  .nav-link{padding:13px 12px;font-size:15.5px}
  .nav-link::after{left:12px;right:auto;width:22px;bottom:6px}
  .nav-toggle{display:inline-flex}
  .nav-right .btn-primary{display:none}
  .mega{position:static}
  .mega-btn{height:44px;padding:0 12px}
  .mega-panel{position:fixed;left:0;right:0;top:64px;width:auto;border-radius:0;border-left:0;border-right:0;padding:18px 24px 24px;grid-template-columns:1fr;gap:16px;max-height:calc(100vh - 64px);overflow:auto}
  .hero{padding:26px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-media{max-width:640px}
  .hero-float{right:auto;left:20px;bottom:-20px;width:250px}
  .timeline{grid-template-columns:1fr;gap:0}
  .tl-item{border-top:0;border-left:2px solid var(--line);padding:6px 0 28px 26px}
  .tl-item::before{top:14px;left:-7px}
  .tl-item:hover{transform:translateX(4px);border-left-color:var(--ink-900);background:transparent}
  .split{grid-template-columns:1fr;gap:36px}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .sec{padding:56px 0}
  .topbar .container{flex-direction:column;align-items:flex-start;gap:2px;padding-top:8px;padding-bottom:8px}
  .hero h1{font-size:clamp(28px,7.4vw,38px)}
  .hero-sub{font-size:16px}
  .hero-actions{gap:12px}
  .hero-actions .btn{flex:1 1 100%}
  .trust-row{gap:10px}
  .trust-row li{padding:0 14px 0 0;border-left:0;font-size:13.5px}
  .trust-row li:first-child{padding-left:0}
  .hero-float{position:static;width:100%;margin-top:16px;right:auto;left:auto;bottom:auto}
  .hero-media::after{inset:0 0 auto 0;height:100%}
  .scene-grid{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .faq-a p{padding-right:0}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:420px){
  .brand{font-size:17px}
  .hero h1{font-size:26px}
  .trust-row li{font-size:13px}
  .btn{width:100%}
  .hero-actions .btn{width:100%}
  .form-foot .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
:root{
  --ink-900:#0E1512;
  --ink-800:#16211C;
  --ink-700:#23302B;
  --ink-500:#4A5A54;
  --ink-300:#8A9791;
  --accent:#16C08A;
  --accent-700:#0F9A6E;
  --sand:#D9B48F;
  --bg:#F7F6F2;
  --surface:#FFFFFF;
  --surface-2:#EFEDE6;
  --line:#E4E2DA;
  --line-strong:#CFCCC1;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --sh-1:0 1px 2px rgba(14,21,18,.04), 0 8px 24px rgba(14,21,18,.06);
  --sh-2:0 16px 40px rgba(14,21,18,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;
  --sp-section:104px;
}
@media (max-width:1023px){:root{--sp-section:72px}}
@media (max-width:767px){:root{--sp-section:56px}}

/* ===== reset / base ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-700);
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;font-family:var(--serif);font-weight:700;color:var(--ink-900);letter-spacing:-.015em;line-height:1.2}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
::selection{background:rgba(22,192,138,.22)}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 40px}
@media (max-width:1279px){.container{max-width:1040px}}
@media (max-width:1023px){.container{padding:0 24px;max-width:100%}}
@media (max-width:767px){.container{padding:0 20px}}

.section{padding:var(--sp-section) 0}
.section--alt{background:var(--surface-2)}
.section--paper{background:var(--surface)}
.section-head{max-width:760px;margin-bottom:48px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;font-weight:600;letter-spacing:.14em;color:var(--accent-700);
  text-transform:uppercase;margin-bottom:16px;
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent);border-radius:2px}
.section-head.center .eyebrow::before{display:none}
.section-head.center .eyebrow{justify-content:center}
h2.section-title{font-size:clamp(24px,2.6vw,32px)}
.section-lead{margin-top:16px;color:var(--ink-500);font-size:16.5px;max-width:680px}
.section-head.center .section-lead{margin-left:auto;margin-right:auto}

/* ===== 按钮 / 标签 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
  white-space:nowrap;
}
.btn .arrow{transition:transform .18s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.btn-primary{background:var(--ink-900);color:#fff}
.btn-primary:hover{background:var(--ink-700);box-shadow:var(--sh-1)}
.btn-accent{background:var(--accent);color:var(--ink-900)}
.btn-accent:hover{background:var(--accent-700);color:#fff}
.btn-ghost{background:transparent;color:var(--ink-900);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:var(--ink-900);background:rgba(14,21,18,.04)}
.btn-on-dark{background:transparent;color:#fff;border-color:rgba(255,255,255,.28)}
.btn-on-dark:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn:active{transform:translateY(1px)}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  height:26px;padding:0 10px;border-radius:999px;
  font-size:12px;font-weight:600;letter-spacing:.1em;
  color:var(--accent-700);background:rgba(22,192,138,.1);
  border:1px solid rgba(22,192,138,.32);
}
.chip-sand{color:#8a6743;background:rgba(217,180,143,.18);border-color:rgba(217,180,143,.5)}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--ink-900);font-weight:600;font-size:15px;
  border-bottom:1px solid var(--line-strong);padding-bottom:2px;
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.link-arrow:hover{border-color:var(--accent);color:var(--accent-700)}

/* ===== header / nav ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,242,.88);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid transparent;
  transition:background-color .24s var(--ease),border-color .24s var(--ease),box-shadow .24s var(--ease);
}
.site-header.is-scrolled{background:rgba(255,255,255,.97);border-bottom-color:var(--line);box-shadow:var(--sh-1)}
.nav-wrap{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  position:relative;width:26px;height:26px;border-radius:7px;background:var(--ink-900);
  transition:transform .3s var(--ease);flex:0 0 26px;
}
.brand-mark::after{
  content:"";position:absolute;right:5px;top:5px;width:9px;height:9px;
  background:var(--accent);border-radius:2px;transform:rotate(12deg);
}
.brand:hover .brand-mark{transform:rotate(8deg)}
.brand-text{font-family:var(--serif);font-size:19px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em}

.main-nav{display:flex;align-items:center;gap:2px;margin:0 auto}
.nav-link{
  position:relative;padding:10px 14px;font-size:15px;font-weight:500;color:var(--ink-700);
  border-radius:8px;transition:color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.nav-link:hover{color:var(--ink-900)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink-900);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}

.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.mega{position:relative}
.mega-btn{
  display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 12px;
  background:transparent;border:1px solid transparent;border-radius:8px;
  font-size:15px;font-weight:500;color:var(--ink-700);cursor:pointer;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.mega-btn:hover{color:var(--ink-900);border-color:var(--line)}
.mega-btn .chev{font-size:11px;transition:transform .2s var(--ease)}
.mega[data-open="true"] .mega-btn{color:var(--ink-900);border-color:var(--line-strong)}
.mega[data-open="true"] .chev{transform:rotate(180deg)}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 14px);width:740px;
  display:grid;grid-template-columns:1fr 1fr 1.15fr;gap:24px;
  padding:28px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.mega[data-open="true"] .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-title{font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--ink-300);margin-bottom:14px}
.mega-col a{
  display:block;padding:8px 0;font-size:14.5px;color:var(--ink-700);
  border-bottom:1px solid transparent;transition:color .18s var(--ease),border-color .18s var(--ease);
}
.mega-col a:hover{color:var(--accent-700);border-bottom-color:var(--line)}
.mega-card{
  background:var(--ink-900);border-radius:var(--r-md);padding:22px;
  display:flex;flex-direction:column;gap:10px;border:1px solid rgba(22,192,138,.35);
}
.mega-card strong{font-family:var(--serif);font-size:17px;color:#fff}
.mega-card span{font-size:13.5px;line-height:1.7;color:rgba(255,255,255,.72)}
.mega-card .btn{margin-top:6px;height:42px;font-size:14px}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:#fff;cursor:pointer;padding:0;align-items:center;justify-content:center;flex-direction:column;gap:4px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ===== hero ===== */
.hero{
  position:relative;overflow:hidden;background:var(--ink-900);color:#fff;
  padding:96px 0 88px;text-align:center;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:url("/assets/images/backpic/back-2.png") center/cover no-repeat;
  opacity:.24;
}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,21,18,.42) 0%,rgba(14,21,18,.86) 100%);
}
.hero .container{position:relative;z-index:2}
.hero-inner{max-width:860px;margin:0 auto}
.hero .eyebrow{color:var(--accent)}
.hero h1{
  color:#fff;font-size:clamp(30px,4.2vw,52px);line-height:1.16;letter-spacing:-.02em;
  margin-bottom:20px;
}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero-sub{
  font-size:17px;line-height:1.8;color:rgba(255,255,255,.76);
  max-width:680px;margin:0 auto 32px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.hero-meta{
  margin-top:44px;padding-top:26px;border-top:1px solid rgba(255,255,255,.14);
  display:flex;flex-wrap:wrap;gap:28px;justify-content:center;
}
.hero-meta div{display:flex;align-items:baseline;gap:8px;font-size:14px;color:rgba(255,255,255,.7)}
.hero-meta strong{font-family:var(--serif);font-size:22px;color:#fff;font-variant-numeric:tabular-nums}
.hero-channels{
  margin-top:44px;display:flex;flex-wrap:wrap;gap:10px;justify-content:center;
}
.hero-channels a{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 18px;border-radius:999px;font-size:14.5px;font-weight:500;
  color:rgba(255,255,255,.8);border:1px solid rgba(255,255,255,.2);
  transition:background-color .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.hero-channels a:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.45);color:#fff}
.hero-channels a.is-current{background:var(--accent);border-color:var(--accent);color:var(--ink-900);font-weight:600}

/* ===== 面包屑 ===== */
.crumb{background:var(--surface-2);border-bottom:1px solid var(--line);font-size:13.5px}
.crumb .container{display:flex;align-items:center;gap:8px;height:50px;flex-wrap:wrap}
.crumb a{color:var(--ink-300);transition:color .18s var(--ease)}
.crumb a:hover{color:var(--accent-700)}
.crumb .sep{color:var(--line-strong)}
.crumb .current{color:var(--ink-900);font-weight:600}

/* ===== 三等分信息列 ===== */
.trio{display:grid;grid-template-columns:repeat(3,1fr)}
.trio-item{padding:8px 36px 8px 0;border-right:1px solid var(--line)}
.trio-item:last-child{border-right:0;padding-right:0}
.trio-item + .trio-item{padding-left:36px}
.trio-num{
  font-family:var(--serif);font-size:15px;font-weight:700;color:var(--accent-700);
  letter-spacing:.1em;margin-bottom:14px;font-variant-numeric:tabular-nums;
}
.trio-item h3{font-size:20px;margin-bottom:12px}
.trio-item p{color:var(--ink-500);font-size:15.5px;line-height:1.8;margin-bottom:18px}

/* ===== 交替图文 ===== */
.split{display:grid;grid-template-columns:1.02fr .98fr;gap:60px;align-items:center}
.split + .split{margin-top:88px}
.split.reverse .split-media{order:2}
.split-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--sh-1);
  background:var(--surface-2);
}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .5s var(--ease)}
.split-media:hover img{transform:scale(1.03)}
.split-media::after{
  content:"";position:absolute;inset:0;background:rgba(14,21,18,0);
  transition:background-color .3s var(--ease);
}
.split-media:hover::after{background:rgba(14,21,18,.18)}
.split-body h3{font-size:clamp(22px,2.2vw,28px);margin:16px 0 18px}
.split-body p{color:var(--ink-500);font-size:16px;line-height:1.85;margin-bottom:16px}
.split-stats{display:flex;flex-wrap:wrap;gap:36px;margin:24px 0 22px;padding-top:22px;border-top:1px solid var(--line)}
.split-stats div span{display:block;font-size:13px;color:var(--ink-300);letter-spacing:.04em}
.split-stats div strong{
  font-family:var(--serif);font-size:26px;color:var(--ink-900);font-variant-numeric:tabular-nums;
}
.check-list{margin:0 0 20px;display:grid;gap:10px}
.check-list li{position:relative;padding-left:22px;font-size:15.5px;color:var(--ink-700);line-height:1.7}
.check-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;
  background:var(--accent);border-radius:2px;
}

/* ===== 设置项表格 ===== */
.table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);background:#fff}
.spec-table{min-width:720px;font-size:15px}
.spec-table caption{
  text-align:left;padding:20px 24px 0;font-size:13px;letter-spacing:.1em;
  color:var(--ink-300);font-weight:600;
}
.spec-table th{
  text-align:left;padding:16px 24px;background:var(--surface-2);
  font-size:13.5px;font-weight:600;letter-spacing:.06em;color:var(--ink-700);
  border-bottom:1px solid var(--line);
}
.spec-table td{padding:18px 24px;border-bottom:1px solid var(--line);color:var(--ink-500);line-height:1.7}
.spec-table tbody tr:last-child td{border-bottom:0}
.spec-table tbody tr{transition:background-color .18s var(--ease)}
.spec-table tbody tr:hover{background:rgba(239,237,230,.5)}
.spec-table td:first-child{color:var(--ink-900);font-weight:600;white-space:nowrap}
.spec-table td:nth-child(2){color:var(--accent-700);font-weight:500;white-space:nowrap}

/* ===== 参数卡 2×2 ===== */
.param-grid{
  display:grid;grid-template-columns:1fr 1fr;
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:#fff;
}
.param-cell{padding:34px 32px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.param-cell:nth-child(2n){border-right:0}
.param-cell:nth-child(n+3){border-bottom:0}
.param-cell h3{font-size:18px;margin-bottom:12px;display:flex;align-items:center;gap:10px}
.param-cell h3::before{
  content:"";width:6px;height:6px;background:var(--accent);border-radius:50%;flex:0 0 6px;
}
.param-cell p{color:var(--ink-500);font-size:15.5px;line-height:1.8}
.param-note{margin-top:22px;font-size:14px;color:var(--ink-300)}

/* ===== FAQ ===== */
.faq-list{max-width:840px;margin:0 auto;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
  gap:20px;padding:22px 4px;font-size:17px;font-weight:600;color:var(--ink-900);
  transition:color .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--accent-700)}
.faq-icon{
  position:relative;flex:0 0 22px;width:22px;height:22px;border-radius:50%;
  border:1.5px solid var(--ink-300);
  transition:transform .24s var(--ease),border-color .24s var(--ease),background-color .24s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink-500);
  transform:translate(-50%,-50%);transition:background-color .24s var(--ease);
}
.faq-icon::before{width:10px;height:1.5px}
.faq-icon::after{width:1.5px;height:10px}
.faq-item[open] .faq-icon{transform:rotate(90deg);border-color:var(--accent);background:rgba(22,192,138,.12)}
.faq-item[open] .faq-icon::before,.faq-item[open] .faq-icon::after{background:var(--accent-700)}
.faq-answer{padding:0 48px 24px 4px;color:var(--ink-500);font-size:15.5px;line-height:1.85;max-width:720px}

/* ===== CTA 条 ===== */
.cta{
  position:relative;overflow:hidden;background:var(--ink-900);color:#fff;
  border-radius:var(--r-lg);padding:56px;margin:0 auto;
  display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:start;
}
.cta::before{
  content:"";position:absolute;right:-120px;top:-140px;width:520px;height:420px;
  background:radial-gradient(closest-side,rgba(22,192,138,.28),rgba(22,192,138,0));
  pointer-events:none;
}
.cta-copy{position:relative;z-index:2}
.cta-copy h2{color:#fff;font-size:clamp(24px,2.6vw,32px);margin-bottom:16px}
.cta-copy p{color:rgba(255,255,255,.72);font-size:15.5px;line-height:1.85;margin-bottom:24px}
.cta-points{display:grid;gap:12px}
.cta-points li{position:relative;padding-left:22px;font-size:14.5px;color:rgba(255,255,255,.8)}
.cta-points li::before{
  content:"";position:absolute;left:0;top:.6em;width:8px;height:8px;
  background:var(--accent);border-radius:2px;
}
.cta-form{
  position:relative;z-index:2;background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.14);border-radius:var(--r-md);padding:28px;
}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:500;color:rgba(255,255,255,.8);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;height:48px;padding:0 14px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);
  color:#fff;font-size:15px;transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease);
}
.field textarea{height:96px;padding:12px 14px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.4)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--accent);background:rgba(255,255,255,.1);
  box-shadow:0 0 0 4px rgba(22,192,138,.16);
}
.field select option{color:var(--ink-900)}
.form-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:6px}
.form-tip{font-size:13px;color:rgba(255,255,255,.55)}
.form-success{
  display:flex;align-items:center;gap:12px;padding:18px 20px;
  background:rgba(22,192,138,.14);border:1px solid rgba(22,192,138,.45);
  border-radius:var(--r-sm);color:#fff;font-size:15px;
}
.form-success .tick{
  flex:0 0 24px;width:24px;height:24px;border-radius:50%;background:var(--accent);
  position:relative;
}
.form-success .tick::after{
  content:"";position:absolute;left:8px;top:4px;width:6px;height:11px;
  border:2px solid var(--ink-900);border-top:0;border-left:0;transform:rotate(42deg);
}

/* ===== 回到顶部 ===== */
.to-top{
  position:fixed;right:24px;bottom:24px;width:44px;height:44px;border-radius:50%;
  background:var(--ink-900);color:#fff;border:0;cursor:pointer;
  display:flex;align-items:center;justify-content:center;font-size:16px;
  box-shadow:var(--sh-1);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s,background-color .18s var(--ease);
  z-index:70;
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--accent);color:var(--ink-900)}

/* ===== footer ===== */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.7);margin-top:var(--sp-section);padding:72px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand{
  display:flex;align-items:center;gap:10px;margin-bottom:18px;
  font-family:var(--serif);font-size:19px;font-weight:700;color:#fff;
}
.footer-brand .brand-mark{background:#fff}
.footer-brand .brand-mark::after{background:var(--accent)}
.footer-about{font-size:14px;line-height:1.85;max-width:320px;color:rgba(255,255,255,.68)}
.footer-col h4{
  font-family:var(--sans);font-size:13px;font-weight:600;letter-spacing:.1em;
  color:rgba(255,255,255,.9);margin-bottom:18px;
}
.footer-col a{
  display:block;padding:7px 0;font-size:14px;color:rgba(255,255,255,.7);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-col a:hover{color:var(--accent);transform:translateX(3px)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding-top:24px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.5);
}

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

/* ===== 响应式 ===== */
@media (max-width:1023px){
  .nav-wrap{height:64px}
  .main-nav{
    display:none;position:fixed;left:0;right:0;top:64px;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh-1);
    flex-direction:column;align-items:stretch;gap:0;padding:12px 20px 20px;margin:0;
    max-height:calc(100vh - 64px);overflow-y:auto;z-index:59;
  }
  .main-nav.is-open{display:flex}
  .nav-link{padding:14px 4px;font-size:16px;border-bottom:1px solid var(--line);border-radius:0}
  .nav-link::after{display:none}
  .nav-link.is-active{color:var(--accent-700)}
  .nav-toggle{display:flex}
  .mega-panel{
    position:static;width:100%;grid-template-columns:1fr;gap:16px;padding:18px 4px 4px;
    box-shadow:none;border:0;border-radius:0;opacity:1;visibility:visible;transform:none;display:none;
  }
  .mega[data-open="true"] .mega-panel{display:grid}
  .mega-btn{border-color:var(--line);width:100%;justify-content:space-between;height:46px}
  .hero{padding:72px 0 64px}
  .trio{grid-template-columns:1fr}
  .trio-item{padding:24px 0;border-right:0;border-bottom:1px solid var(--line)}
  .trio-item + .trio-item{padding-left:0}
  .trio-item:last-child{border-bottom:0}
  .split{grid-template-columns:1fr;gap:32px}
  .split.reverse .split-media{order:0}
  .split + .split{margin-top:64px}
  .param-grid{grid-template-columns:1fr}
  .param-cell{border-right:0}
  .param-cell:nth-child(n+3){border-bottom:1px solid var(--line)}
  .param-cell:last-child{border-bottom:0}
  .cta{grid-template-columns:1fr;gap:36px;padding:40px 32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-about{max-width:100%}
}
@media (max-width:767px){
  body{font-size:16px}
  .hero{padding:56px 0 52px}
  .hero-sub{font-size:15.5px}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{width:100%}
  .hero-meta{gap:18px}
  .hero-meta div{font-size:13px}
  .hero-channels a{font-size:13.5px;padding:9px 14px}
  .form-row{grid-template-columns:1fr}
  .cta{padding:32px 22px;border-radius:var(--r-md)}
  .cta-form{padding:22px}
  .form-actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .faq-item summary{font-size:15.5px;padding:18px 2px}
  .faq-answer{padding:0 30px 20px 2px}
  .to-top{right:16px;bottom:16px}
}
@media (max-width:420px){
  .hero h1{font-size:26px}
  .brand-text{font-size:17px}
  .btn{height:46px;padding:0 18px;font-size:14.5px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category3 */
:root{
  --ink-900:#0E1512;
  --ink-700:#23302B;
  --ink-500:#4A5A54;
  --ink-300:#8A9791;
  --accent:#16C08A;
  --accent-d:#12A876;
  --sand:#D9B48F;
  --bg:#F7F6F2;
  --surface:#FFFFFF;
  --surface-2:#EFEDE6;
  --line:#E4E2DA;
  --err:#C0392B;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:22px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --sh-1:0 1px 2px rgba(14,21,18,.04),0 8px 24px rgba(14,21,18,.06);
  --sh-2:0 16px 40px rgba(14,21,18,.10);
  --serif:'Noto Serif SC','Source Han Serif SC','Songti SC',Georgia,serif;
  --sans:'Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:16.5px;
  line-height:1.75;
  color:var(--ink-900);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:rgba(22,192,138,.22)}

/* ---------- 容器 ---------- */
.container{width:100%;max-width:1240px;margin:0 auto;padding:0 40px}

/* ---------- 通用元件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:12px;
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:background-color 180ms var(--ease),color 180ms var(--ease),
             transform 180ms var(--ease),box-shadow 180ms var(--ease),border-color 180ms var(--ease);
}
.btn span.arw{transition:transform 180ms var(--ease)}
.btn:hover span.arw{transform:translateX(4px)}
.btn-primary{background:var(--ink-900);color:#fff}
.btn-primary:hover{background:var(--ink-700);transform:translateY(-1px)}
.btn-accent{background:var(--accent);color:var(--ink-900)}
.btn-accent:hover{background:var(--accent-d);transform:translateY(-1px)}
.btn-ghost{background:var(--surface);color:var(--ink-900);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--ink-900);transform:translateY(-1px)}
.btn-line{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.28)}
.btn-line:hover{border-color:#fff}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);outline-offset:2px;border-radius:4px;
}
.chip{
  display:inline-block;padding:4px 10px;border-radius:999px;
  font-size:12px;letter-spacing:.1em;line-height:1.6;
  color:var(--accent-d);background:rgba(22,192,138,.07);
  border:1px solid rgba(22,192,138,.32);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:13px;letter-spacing:.14em;color:var(--ink-500);
}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--accent);display:block}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-head h2{
  font-family:var(--serif);font-weight:700;letter-spacing:-.015em;
  font-size:clamp(26px,3vw,34px);line-height:1.24;margin:14px 0 14px;
}
.sec-head p{color:var(--ink-500);font-size:16px}
.section{padding:104px 0}
.section.alt{background:var(--surface-2)}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;
  color:var(--accent-d);position:relative;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:-3px;height:1px;width:100%;
  background:var(--accent-d);transform:scaleX(0);transform-origin:left;
  transition:transform 180ms var(--ease);
}
.text-link:hover::after{transform:scaleX(1)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,246,242,.88);
  -webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background-color 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.site-header.is-scrolled{background:#fff;border-bottom-color:var(--line);box-shadow:var(--sh-1)}
.nav-wrap{display:flex;align-items:center;gap:34px;height:72px;position:relative}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:19px;letter-spacing:-.01em}
.brand-mark{
  position:relative;width:26px;height:26px;border-radius:7px;background:var(--ink-900);
  display:inline-block;transition:transform 240ms var(--ease);flex:none;
}
.brand-mark::after{
  content:"";position:absolute;right:5px;top:5px;width:10px;height:10px;border-radius:50%;
  background:var(--accent);
}
.brand:hover .brand-mark{transform:rotate(6deg)}
.main-nav{display:flex;align-items:center;gap:28px}
.nav-link{
  position:relative;padding:6px 0;font-size:15px;font-weight:500;color:var(--ink-700);
  transition:color 180ms var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;background:var(--accent);
  transform:scaleX(0);transform-origin:left;transition:transform 180ms var(--ease);
}
.nav-link:hover{color:var(--ink-900)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink-900);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-right{margin-left:auto;display:flex;align-items:center;gap:14px}

/* 更多面板 */
.mega{position:relative}
.mega-btn{
  display:inline-flex;align-items:center;gap:6px;height:40px;padding:0 12px;border-radius:10px;
  font-size:15px;font-weight:500;color:var(--ink-700);
  transition:background-color 180ms var(--ease),color 180ms var(--ease);
}
.mega-btn:hover{background:var(--surface-2);color:var(--ink-900)}
.mega-btn .chev{font-size:11px;transition:transform 200ms var(--ease)}
.mega[data-open="true"] .mega-btn{background:var(--surface-2);color:var(--ink-900)}
.mega[data-open="true"] .chev{transform:rotate(180deg)}
.mega-panel{
  position:absolute;top:calc(100% + 14px);right:0;width:760px;
  display:grid;grid-template-columns:1fr 1fr 1.15fr;gap:26px;
  padding:26px 26px 24px;border-radius:var(--r-lg);
  background:var(--surface);border:1px solid var(--line);box-shadow:var(--sh-2);
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity 200ms var(--ease),transform 200ms var(--ease),visibility 200ms;
}
.mega[data-open="true"] .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col{display:flex;flex-direction:column;gap:2px}
.mega-title{font-size:12.5px;letter-spacing:.12em;color:var(--ink-300);margin-bottom:10px}
.mega-col a{
  font-size:14.5px;color:var(--ink-700);padding:8px 0;border-radius:6px;
  transition:color 160ms var(--ease),padding-left 160ms var(--ease);
}
.mega-col a:hover{color:var(--accent-d);padding-left:6px}
.mega-card{
  display:flex;flex-direction:column;gap:10px;align-items:flex-start;
  padding:20px;border-radius:var(--r-md);
  background:var(--ink-900);border:1px solid rgba(22,192,138,.5);
}
.mega-card strong{color:#fff;font-size:15px}
.mega-card span{color:rgba(255,255,255,.7);font-size:13.5px;line-height:1.7}
.mega-card .btn{height:40px;font-size:14px;padding:0 18px;margin-top:4px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);
  background:var(--surface);flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink-900);border-radius:2px;transition:transform 200ms var(--ease),opacity 200ms var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{padding:76px 0 92px;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(720px 380px at 88% 8%,rgba(22,192,138,.10),transparent 68%),
    linear-gradient(180deg,#F7F6F2 0%,#F4F2EC 100%);
  z-index:-1;
}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--ink-300);margin-bottom:26px}
.breadcrumb a{color:var(--ink-300);transition:color 160ms var(--ease)}
.breadcrumb a:hover{color:var(--accent-d)}
.breadcrumb .sep{color:var(--line)}
.breadcrumb .cur{color:var(--ink-900);font-weight:500}
.hero-grid{display:grid;grid-template-columns:1.18fr .92fr;gap:56px;align-items:center}
.hero h1{
  font-family:var(--serif);font-weight:700;letter-spacing:-.02em;
  font-size:clamp(34px,4.2vw,50px);line-height:1.2;margin:16px 0 18px;
}
.hero .lead{color:var(--ink-500);font-size:17px;max-width:56ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.trust-row{
  display:flex;flex-wrap:wrap;gap:0;margin-top:34px;
  border-top:1px solid var(--line);padding-top:20px;
}
.trust-row span{
  font-size:13.5px;color:var(--ink-500);padding:0 18px;position:relative;
}
.trust-row span:first-child{padding-left:0}
.trust-row span+span::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:1px;height:14px;background:var(--line);
}
.hero-card{
  position:relative;overflow:hidden;
  background:var(--ink-900);color:#fff;border-radius:var(--r-lg);
  padding:34px 30px 30px;box-shadow:var(--sh-2);
}
.hero-card::after{
  content:"";position:absolute;right:-60px;top:-70px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,192,138,.30),transparent 68%);
  pointer-events:none;
}
.hc-tag{
  display:inline-block;font-size:12px;letter-spacing:.14em;color:var(--accent);
  border:1px solid rgba(22,192,138,.42);border-radius:999px;padding:4px 12px;
}
.hc-title{font-family:var(--serif);font-size:21px;font-weight:700;margin:18px 0 18px;line-height:1.4}
.hc-list{display:flex;flex-direction:column}
.hc-list li{
  display:flex;align-items:baseline;justify-content:space-between;gap:16px;
  padding:12px 0;border-top:1px solid rgba(255,255,255,.12);font-size:14.5px;
}
.hc-list li em{font-style:normal;color:rgba(255,255,255,.62)}
.hc-list li strong{font-weight:600;color:#fff;font-variant-numeric:tabular-nums;text-align:right}
.hero-card .btn{margin-top:22px;width:100%}

/* ---------- 支持网格 ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  display:flex;flex-direction:column;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(14,21,18,.2)}
.card-media{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--surface-2)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 420ms var(--ease)}
.card-media::after{
  content:"";position:absolute;inset:0;background:rgba(14,21,18,.18);
  opacity:0;transition:opacity 220ms var(--ease);
}
.card:hover .card-media img{transform:scale(1.03)}
.card:hover .card-media::after{opacity:1}
.card-body{padding:22px 20px 24px;display:flex;flex-direction:column;gap:10px}
.card-body h3{font-size:18px;font-weight:600;line-height:1.45}
.card-body p{font-size:14.5px;color:var(--ink-500);line-height:1.7}
.card-body .text-link{margin-top:4px}

/* ---------- 流程时间轴 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line)}
.step{
  position:relative;padding:34px 26px 34px 0;
  transition:transform 220ms var(--ease);
}
.step+.step{padding-left:26px;border-left:1px solid var(--line)}
.step:hover{transform:translateY(-4px)}
.step-num{
  font-family:var(--serif);font-size:38px;font-weight:700;line-height:1;
  color:var(--accent);letter-spacing:-.02em;font-variant-numeric:tabular-nums;
}
.step h3{font-size:17px;font-weight:600;margin:16px 0 8px}
.step p{font-size:14.5px;color:var(--ink-500);line-height:1.72}

/* ---------- 自查清单 + 数据条 ---------- */
.two-col{display:grid;grid-template-columns:1.45fr .85fr;gap:48px;align-items:start}
.check-list{display:grid;grid-template-columns:1fr 1fr;gap:0 34px}
.check-list li{
  display:flex;gap:12px;padding:16px 0;border-bottom:1px solid var(--line);
  font-size:15px;color:var(--ink-700);
}
.check-list li::before{
  content:"";flex:none;width:7px;height:7px;margin-top:9px;border-radius:2px;background:var(--accent);
}
.data-panel{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:28px 26px;box-shadow:var(--sh-1);
}
.data-panel h3{font-size:16px;font-weight:600;margin-bottom:16px}
.data-panel dl{display:flex;flex-direction:column;gap:0}
.data-panel dt{
  font-size:13px;color:var(--ink-300);letter-spacing:.04em;padding-top:14px;
}
.data-panel dd{
  margin:2px 0 0;font-size:22px;font-weight:700;font-variant-numeric:tabular-nums;
  font-family:var(--serif);letter-spacing:-.01em;
}
.data-panel dd span{font-size:14px;font-weight:500;font-family:var(--sans);color:var(--ink-500);margin-left:6px;letter-spacing:0}
.data-panel .divider{height:1px;background:var(--line);margin:18px 0 6px}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:840px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:first-child{border-top:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 0;text-align:left;font-size:17px;font-weight:600;color:var(--ink-900);
  transition:color 180ms var(--ease);
}
.faq-q:hover{color:var(--accent-d)}
.faq-icon{
  position:relative;flex:none;width:22px;height:22px;border-radius:50%;
  border:1.5px solid var(--ink-300);transition:transform 240ms var(--ease),border-color 240ms var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink-500);
  transform:translate(-50%,-50%);transition:background-color 240ms var(--ease);
}
.faq-icon::before{width:10px;height:1.5px}
.faq-icon::after{width:1.5px;height:10px}
.faq-item.is-open .faq-icon{transform:rotate(135deg);border-color:var(--accent)}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:var(--accent)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 300ms var(--ease)}
.faq-a p{padding:0 40px 22px 0;font-size:15.5px;color:var(--ink-500);line-height:1.8}

/* ---------- 延伸阅读 ---------- */
.post-list{display:grid;gap:20px}
.post-card{
  display:grid;grid-template-columns:230px 1fr;gap:24px;align-items:center;
  padding:18px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  transition:transform 220ms var(--ease),box-shadow 220ms var(--ease),border-color 220ms var(--ease);
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(14,21,18,.2)}
.post-card figure{border-radius:var(--r-sm);overflow:hidden;aspect-ratio:16/10;background:var(--surface-2)}
.post-card figure img{width:100%;height:100%;object-fit:cover;transition:transform 420ms var(--ease)}
.post-card:hover figure img{transform:scale(1.03)}
.post-card h3{font-size:18px;font-weight:600;margin:12px 0 8px;line-height:1.5}
.post-card p{font-size:14.5px;color:var(--ink-500);line-height:1.7}
.post-meta{display:flex;align-items:center;gap:12px;font-size:13px;color:var(--ink-300);font-variant-numeric:tabular-nums}

/* ---------- CTA ---------- */
.cta{position:relative;overflow:hidden;background:var(--ink-900);color:#fff;padding:82px 0}
.cta::before{
  content:"";position:absolute;right:-120px;top:-140px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(22,192,138,.20),transparent 66%);
}
.cta-grid{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.cta h2{font-family:var(--serif);font-size:clamp(26px,3vw,32px);font-weight:700;line-height:1.3;margin:16px 0 14px}
.cta p.sub{color:rgba(255,255,255,.72);font-size:15.5px;max-width:46ch}
.cta-points{margin-top:26px;display:flex;flex-direction:column;gap:10px}
.cta-points li{font-size:14.5px;color:rgba(255,255,255,.78);display:flex;gap:10px;align-items:flex-start}
.cta-points li::before{content:"";flex:none;width:6px;height:6px;margin-top:10px;border-radius:2px;background:var(--accent)}
.cta .eyebrow{color:rgba(255,255,255,.62)}
.form{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:13.5px;font-weight:500;color:rgba(255,255,255,.82)}
.field input,.field select,.field textarea{
  width:100%;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.2);
  border-radius:var(--r-sm);color:#fff;padding:0 14px;height:48px;
  transition:border-color 180ms var(--ease),box-shadow 180ms var(--ease),background-color 180ms var(--ease);
}
.field textarea{height:112px;padding:12px 14px;resize:vertical;line-height:1.7}
.field select option{color:var(--ink-900)}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.42)}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--accent);background:rgba(255,255,255,.1);
  box-shadow:0 0 0 4px rgba(22,192,138,.16);
}
.form .btn{width:100%;height:48px}
.form-note{grid-column:1/-1;font-size:13px;color:rgba(255,255,255,.5)}
.form-success{
  grid-column:1/-1;display:none;align-items:center;gap:12px;
  padding:18px 20px;border-radius:var(--r-sm);
  background:rgba(22,192,138,.14);border:1px solid rgba(22,192,138,.42);
  color:#fff;font-size:15px;
}
.form-success.is-show{display:flex}
.form-success .ok{
  flex:none;width:24px;height:24px;border-radius:50%;background:var(--accent);
  display:flex;align-items:center;justify-content:center;color:var(--ink-900);font-size:14px;font-weight:700;
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink-900);color:rgba(255,255,255,.7);padding:72px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:18px;font-weight:700}
.footer-brand .brand-mark{background:rgba(255,255,255,.1)}
.footer-about{margin-top:16px;font-size:14px;line-height:1.8;max-width:34ch;color:rgba(255,255,255,.62)}
.footer-col{display:flex;flex-direction:column;gap:10px}
.footer-col h4{
  font-size:13px;letter-spacing:.1em;color:rgba(255,255,255,.55);
  font-weight:600;margin-bottom:6px;
}
.footer-col a{font-size:14px;color:rgba(255,255,255,.72);transition:color 160ms var(--ease)}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  font-size:13px;color:rgba(255,255,255,.5);
}
.to-top{
  position:fixed;right:26px;bottom:26px;width:44px;height:44px;border-radius:50%;
  background:var(--ink-900);color:#fff;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--sh-2);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity 220ms var(--ease),transform 220ms var(--ease),visibility 220ms,background-color 180ms var(--ease);
  z-index:70;
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--accent-d)}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 断点 ---------- */
@media (max-width:1279px){
  .container{max-width:1040px;padding:0 32px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav-wrap{height:64px;gap:16px}
  .mega{display:none}
  .nav-toggle{display:flex}
  .main-nav{
    position:absolute;top:100%;left:0;right:0;display:none;flex-direction:column;gap:0;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh-1);
    padding:6px 24px 18px;
  }
  .main-nav.is-open{display:flex}
  .nav-link{padding:14px 0;border-bottom:1px solid var(--line);width:100%}
  .nav-link::after{display:none}
  .nav-link.is-active{color:var(--accent-d)}
  .section{padding:72px 0}
  .hero{padding:56px 0 68px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr 1fr;border-top:0}
  .step{padding:26px 24px 26px 0;border-top:1px solid var(--line)}
  .step+.step{padding-left:24px}
  .step:nth-child(odd){padding-left:0;border-left:0}
  .two-col{grid-template-columns:1fr;gap:32px}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
}
@media (max-width:767px){
  body{font-size:16px}
  .container{padding:0 20px}
  .section{padding:56px 0}
  .hero{padding:40px 0 52px}
  .hero h1{font-size:clamp(30px,8vw,38px)}
  .sec-head{margin-bottom:30px}
  .card-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .step{padding:22px 0;border-left:0!important;padding-left:0!important}
  .check-list{grid-template-columns:1fr;gap:0}
  .post-card{grid-template-columns:1fr;gap:16px}
  .form{grid-template-columns:1fr}
  .faq-a p{padding-right:0}
  .footer-grid{grid-template-columns:1fr}
  .cta{padding:60px 0}
}
@media (max-width:519px){
  .hero h1{font-size:28px}
  .hero-actions .btn{width:100%}
  .trust-row span{padding:6px 14px 6px 0;font-size:13px}
  .trust-row span+span::before{display:none}
  .hero-card{padding:26px 20px}
  .hc-list li{flex-direction:column;gap:4px;align-items:flex-start}
  .hc-list li strong{text-align:left}
  .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}