/* roulang page: index */
:root{
  --primary:#00D3A7;
  --primary-dark:#00A37F;
  --primary-08:rgba(0,211,167,.08);
  --primary-16:rgba(0,211,167,.16);
  --accent:#FF6B2C;
  --violet:#7C5CFF;
  --blue:#2E9BFF;
  --ink:#0B0F12;
  --ink-soft:#151A1F;
  --paper:#F6F7F9;
  --card:#FFFFFF;
  --t1:#14181C;
  --t2:#5A646E;
  --t3:#A8B3BD;
  --line:#E6E9ED;
  --line-dark:rgba(255,255,255,.10);
  --r-s:8px;
  --r-m:14px;
  --r-l:20px;
  --r-p:999px;
  --sh:0 1px 2px rgba(11,15,18,.06),0 8px 24px -12px rgba(11,15,18,.12);
  --sh-hover:0 16px 40px -16px rgba(0,211,167,.30);
  --font:"PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--t1);
  background:var(--paper);
  padding-bottom:0;
}
img{max-width:100%;display:block;}
a{color:var(--t1);text-decoration:none;transition:color .2s ease-out;}
a:hover{color:var(--primary-dark);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0;line-height:1.28;font-weight:800;color:var(--t1);}
h1{font-size:clamp(30px,4.2vw,50px);}
h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;}
h3{font-size:clamp(18px,1.5vw,21px);font-weight:600;}
p{margin:0 0 1.1em;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--primary);outline-offset:3px;border-radius:4px;}
.container-xxl{max-width:1200px;margin:0 auto;padding:0 20px;width:100%;}
.eyebrow{
  display:inline-block;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--primary-dark);
  background:var(--primary-08);
  border:1px solid var(--primary-16);
  border-radius:var(--r-p);
  padding:5px 14px;
  margin-bottom:16px;
}
.section{padding:96px 0;}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-dark{background:var(--ink);color:#F2F5F7;}
.section-dark h2,.section-dark h3{color:#F2F5F7;}
.section-dark p{color:var(--t3);}
.sec-head{max-width:760px;margin-bottom:48px;}
.sec-head p{color:var(--t2);font-size:16.5px;margin-bottom:0;}
.sec-head h2{position:relative;padding-left:18px;}
.sec-head h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:5px;border-radius:3px;background:var(--primary);
}

/* ============ 顶部信息条 ============ */
.topbar{background:var(--ink);color:#C9D3DB;font-size:12.5px;letter-spacing:.02em;border-bottom:1px solid var(--line-dark);}
.topbar-in{display:flex;align-items:center;justify-content:space-between;min-height:38px;gap:16px;}
.topbar-left{display:flex;align-items:center;gap:14px;}
.topbar-dom{font-family:var(--mono);color:var(--primary);letter-spacing:.06em;}
.topbar-sep{width:1px;height:14px;background:var(--line-dark);display:inline-block;}
.topbar-right a{color:#F2F5F7;border-bottom:1px solid var(--primary);padding-bottom:2px;font-size:12.5px;}
.topbar-right a:hover{color:var(--primary);}

/* ============ 主导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1030;background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 1px 2px rgba(11,15,18,.04);
  transition:box-shadow .2s ease-out;
}
.site-header.is-scrolled{box-shadow:0 6px 20px -14px rgba(11,15,18,.5);}
.nav-in{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:70px;transition:min-height .2s ease-out;}
.site-header.is-scrolled .nav-in{min-height:58px;}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:.01em;white-space:nowrap;}
.brand-mark{
  width:30px;height:30px;flex:0 0 30px;border-radius:9px;
  background:var(--ink);border:2px solid var(--primary);
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--primary);font-family:var(--mono);font-size:12px;font-weight:700;
}
.brand span b{color:var(--primary-dark);}
.main-nav{display:flex;align-items:center;gap:4px;flex-wrap:nowrap;}
.main-nav a{
  position:relative;display:block;padding:10px 13px;font-size:15px;color:var(--t2);border-radius:var(--r-s);
  white-space:nowrap;
}
.main-nav a:hover{color:var(--t1);background:var(--primary-08);}
.main-nav a.is-active{color:var(--t1);font-weight:600;}
.main-nav a.is-active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;background:var(--primary);border-radius:2px;
}
.nav-cta{display:flex;align-items:center;gap:12px;}
.hamburger{
  display:none;width:42px;height:42px;border:1.5px solid var(--line);background:#fff;border-radius:var(--r-s);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;
}
.hamburger i{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;}

/* ============ 按钮 ============ */
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-s);font-size:15.5px;font-weight:700;
  cursor:pointer;border:1.5px solid var(--ink);transition:transform .18s ease-out,background .18s ease-out,box-shadow .18s ease-out,color .18s ease-out;
}
.btn-main{background:var(--primary);color:#06231C;box-shadow:4px 4px 0 rgba(11,15,18,.14);}
.btn-main:hover{background:var(--primary-dark);color:#04201A;transform:translateY(-2px);box-shadow:6px 6px 0 rgba(11,15,18,.16);}
.btn-main:active{transform:translateY(1px);box-shadow:2px 2px 0 rgba(11,15,18,.16);}
.btn-ghost{background:transparent;color:var(--t1);border-color:var(--line);}
.btn-ghost:hover{border-color:var(--primary);background:var(--primary-08);color:var(--t1);transform:translateY(-2px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-line{display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--primary-dark);border-bottom:1px solid var(--primary-16);}
.btn-line:hover{color:var(--primary-dark);border-bottom-color:var(--primary);}
.on-dark .btn-ghost{color:#F2F5F7;border-color:var(--line-dark);}
.on-dark .btn-ghost:hover{background:rgba(255,255,255,.06);color:#fff;}

/* ============ Hero ============ */
.hero{
  position:relative;color:#F2F5F7;overflow:hidden;
  background-image:
    linear-gradient(100deg,rgba(11,15,18,.97) 0%,rgba(11,15,18,.9) 40%,rgba(11,15,18,.55) 70%,rgba(11,15,18,.32) 100%),
    url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.09) 1px,transparent 1px);
  background-size:22px 22px;opacity:.5;
}
.hero-in{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding:88px 0 76px;}
.hero h1{color:#fff;margin-bottom:18px;}
.hero h1 em{font-style:normal;color:var(--primary);}
.hero-sub{font-size:18px;color:#C6D1DA;max-width:520px;margin-bottom:28px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px;}
.hero-facts{display:flex;flex-wrap:wrap;gap:26px;border-top:1px solid var(--line-dark);padding-top:22px;}
.fact b{display:block;font-family:var(--mono);font-size:22px;color:var(--primary);letter-spacing:.02em;}
.fact span{font-size:13px;color:var(--t3);}
.hero-card{
  background:rgba(21,26,31,.92);border:1px solid var(--line-dark);border-radius:var(--r-l);
  padding:18px;box-shadow:0 24px 60px -30px rgba(0,0,0,.9);
}
.hero-card img{border-radius:12px;aspect-ratio:16/10;object-fit:cover;}
.hero-card-list{margin-top:16px;display:grid;gap:10px;}
.hero-card-list li{display:flex;gap:10px;font-size:14.5px;color:#D5DEE5;line-height:1.6;}
.hero-card-list li i{
  flex:0 0 20px;width:20px;height:20px;margin-top:3px;border-radius:6px;background:var(--primary-16);
  color:var(--primary);font-style:normal;font-size:12px;display:flex;align-items:center;justify-content:center;font-family:var(--mono);
}

/* ============ 锚点条 ============ */
.anchor-bar{position:sticky;top:70px;z-index:1020;background:rgba(11,15,18,.97);border-top:1px solid var(--line-dark);border-bottom:1px solid var(--line-dark);}
.anchor-in{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;}
.anchor-in::-webkit-scrollbar{display:none;}
.anchor-in a{
  position:relative;display:block;padding:15px 16px;font-size:14.5px;color:#B9C4CD;white-space:nowrap;
}
.anchor-in a::before{content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);width:3px;height:0;background:var(--primary);border-radius:2px;transition:height .2s ease-out;}
.anchor-in a:hover,.anchor-in a.is-current{color:var(--primary);}
.anchor-in a.is-current::before{height:20px;}

/* ============ 卡片 ============ */
.card-b{
  background:var(--card);border:1.5px solid var(--line);border-radius:var(--r-m);padding:26px;
  box-shadow:var(--sh);height:100%;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card-b:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(0,211,167,.45);}
.card-b h3{margin-bottom:10px;}
.card-b p{color:var(--t2);font-size:15px;margin-bottom:0;}
.card-num{
  width:38px;height:38px;border-radius:10px;background:var(--primary-08);border:1.5px solid var(--primary-16);
  color:var(--primary-dark);font-family:var(--mono);font-weight:700;display:flex;align-items:center;justify-content:center;
  margin-bottom:16px;
}
.card-lg{padding:0;overflow:hidden;display:flex;flex-direction:column;}
.card-lg img{aspect-ratio:16/9;object-fit:cover;width:100%;}
.card-lg-body{padding:26px;}
.tag{
  display:inline-block;font-size:12px;letter-spacing:.06em;padding:4px 11px;border-radius:var(--r-p);
  background:var(--primary-08);color:var(--primary-dark);border:1px solid var(--primary-16);font-family:var(--mono);
}
.tag-warm{background:rgba(255,107,44,.1);color:#C64A12;border-color:rgba(255,107,44,.24);}
.mini-list{display:grid;gap:12px;margin-top:16px;}
.mini-list li{display:flex;gap:10px;font-size:14.5px;color:var(--t2);}
.mini-list li::before{content:"";flex:0 0 6px;width:6px;height:6px;margin-top:9px;border-radius:50%;background:var(--primary);}

/* ============ 演示 ============ */
.demo-grid{display:grid;grid-template-columns:1fr 1.08fr;gap:48px;align-items:center;}
.demo-frame{border:1.5px solid var(--line);border-radius:var(--r-l);overflow:hidden;background:#fff;box-shadow:var(--sh);}
.demo-frame img{aspect-ratio:16/9;object-fit:cover;width:100%;}
.demo-points{display:grid;gap:18px;margin-top:26px;}
.demo-points li{display:grid;grid-template-columns:auto 1fr;gap:14px;align-items:start;}
.demo-points b{display:block;font-size:15.5px;margin-bottom:2px;}
.demo-points span{font-size:14.5px;color:var(--t2);}

/* ============ 证据 ============ */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:44px;}
.stat{background:#151A1F;border:1px solid var(--line-dark);border-radius:var(--r-m);padding:26px;text-align:left;}
.stat b{display:block;font-family:var(--mono);font-size:clamp(32px,3.4vw,44px);color:var(--primary);line-height:1.1;}
.stat span{font-size:13.5px;color:var(--t3);}
.logo-row{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:44px;}
.logo-row span{
  border:1px dashed var(--line-dark);border-radius:var(--r-s);padding:10px 18px;font-size:13.5px;color:#8B98A3;
  font-family:var(--mono);letter-spacing:.04em;
}
.quote-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.quote{background:#151A1F;border:1px solid var(--line-dark);border-radius:var(--r-m);padding:28px;position:relative;}
.quote::before{content:"\201C";position:absolute;top:6px;left:20px;font-size:44px;color:var(--primary-16);font-family:Georgia,serif;}
.quote p{color:#D5DEE5;font-size:15px;position:relative;z-index:1;margin-bottom:16px;}
.quote footer{font-size:13px;color:var(--t3);border-top:1px solid var(--line-dark);padding-top:14px;}

/* ============ 价格 ============ */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;align-items:stretch;}
.price-card{
  background:#fff;border:1.5px solid var(--line);border-radius:var(--r-l);padding:32px 28px;
  display:flex;flex-direction:column;box-shadow:var(--sh);position:relative;transition:transform .2s ease-out,box-shadow .2s ease-out;
}
.price-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.price-card.is-featured{border-color:var(--primary);box-shadow:0 18px 44px -22px rgba(0,211,167,.55);}
.price-flag{
  position:absolute;top:-13px;right:24px;background:var(--accent);color:#fff;font-size:12px;
  padding:4px 12px;border-radius:var(--r-p);letter-spacing:.04em;
}
.price-card h3{font-size:18px;margin-bottom:6px;}
.price-card .price-desc{font-size:14px;color:var(--t2);margin-bottom:20px;}
.price-amount{font-family:var(--mono);font-size:40px;font-weight:700;color:var(--t1);line-height:1;margin-bottom:20px;}
.price-amount small{font-size:13px;color:var(--t2);font-family:var(--font);font-weight:400;margin-left:6px;}
.price-list{display:grid;gap:11px;margin-bottom:26px;}
.price-list li{display:flex;gap:10px;font-size:14.5px;color:var(--t2);}
.price-list li::before{content:"✓";color:var(--primary-dark);font-weight:700;}
.price-card .btn-main,.price-card .btn-ghost{margin-top:auto;width:100%;}

/* ============ 最新信息 ============ */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:40px;}
.post-card{
  display:flex;flex-direction:column;background:#fff;border:1.5px solid var(--line);border-radius:var(--r-m);
  overflow:hidden;height:100%;box-shadow:var(--sh);color:var(--t1);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(0,211,167,.45);color:var(--t1);}
.post-thumb img{aspect-ratio:16/9;object-fit:cover;width:100%;}
.post-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1;}
.post-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:12.5px;color:var(--t2);font-family:var(--mono);}
.post-body h3{font-size:17px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.post-body p{
  font-size:14.5px;color:var(--t2);margin:0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-more{margin-top:auto;font-size:14px;font-weight:600;color:var(--primary-dark);}
.empty-box{
  border:1.5px dashed var(--line);border-radius:var(--r-m);padding:56px 24px;text-align:center;background:#fff;
}
.empty-box b{display:block;font-size:16px;margin-bottom:8px;}
.empty-box p{color:var(--t2);font-size:14.5px;margin-bottom:18px;}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:280px 1fr;gap:48px;align-items:start;}
.faq-side{position:sticky;top:150px;}
.faq-side-card{background:#fff;border:1.5px solid var(--line);border-radius:var(--r-m);padding:24px;margin-top:24px;}
.faq-side-card b{display:block;margin-bottom:8px;font-size:15.5px;}
.faq-side-card p{font-size:14px;color:var(--t2);margin-bottom:16px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:0;text-align:left;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:22px 6px 22px 0;font-size:16.5px;font-weight:600;color:var(--t1);cursor:pointer;position:relative;
  transition:color .18s ease-out;
}
.faq-q::before{content:"";position:absolute;left:-14px;top:16px;bottom:16px;width:3px;border-radius:2px;background:transparent;transition:background .18s ease-out;}
.faq-item.is-open .faq-q{color:var(--primary-dark);}
.faq-item.is-open .faq-q::before{background:var(--primary);}
.faq-icon{flex:0 0 24px;width:24px;height:24px;border:1.5px solid var(--line);border-radius:7px;display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:15px;color:var(--t2);}
.faq-item.is-open .faq-icon{border-color:var(--primary);color:var(--primary-dark);}
.faq-a{display:none;padding:0 40px 24px 0;color:var(--t2);font-size:15px;}
.faq-item.is-open .faq-a{display:block;}

/* ============ CTA 带 ============ */
.cta-band{
  position:relative;background:var(--ink);color:#F2F5F7;text-align:center;overflow:hidden;
  background-image:url('/assets/images/backpic/back-2.webp');background-size:cover;background-position:center;
}
.cta-band::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,15,18,.94),rgba(11,15,18,.9));}
.cta-band::after{
  content:"";position:absolute;inset:0;opacity:.4;
  background-image:radial-gradient(rgba(255,255,255,.1) 1px,transparent 1px);background-size:20px 20px;
}
.cta-in{position:relative;z-index:2;max-width:720px;margin:0 auto;padding:88px 0;}
.cta-in h2{color:#fff;margin-bottom:14px;}
.cta-in p{color:#B9C4CD;font-size:16px;margin-bottom:28px;}
.cta-in .btn-main{margin-bottom:12px;}
.cta-note{font-size:13px;color:var(--t3);}

/* ============ 表单 ============ */
.form-row{display:grid;gap:16px;}
.form-field label{display:block;font-size:14px;color:var(--t2);margin-bottom:6px;}
.form-field input,.form-field textarea{
  width:100%;height:46px;border:1.5px solid var(--line);border-radius:10px;padding:0 14px;font-size:15px;font-family:inherit;
  background:#fff;color:var(--t1);transition:border-color .18s ease-out,background .18s ease-out,box-shadow .18s ease-out;
}
.form-field textarea{height:auto;padding:12px 14px;resize:vertical;min-height:110px;line-height:1.7;}
.form-field input:focus,.form-field textarea:focus{
  outline:none;border-color:var(--primary);background:var(--primary-08);box-shadow:0 0 0 3px rgba(0,211,167,.12);
}
.form-field input::placeholder,.form-field textarea::placeholder{color:#9AA4AE;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#C9D3DB;padding:72px 0 0;border-top:1px solid var(--line-dark);}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;border-bottom:1px solid var(--line-dark);}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;color:#fff;font-size:17px;margin-bottom:14px;}
.footer-grid p{font-size:14px;color:var(--t3);line-height:1.8;}
.footer-grid h4{font-size:15px;color:#fff;margin-bottom:16px;font-weight:600;}
.footer-links{display:grid;gap:10px;}
.footer-links a{font-size:14px;color:#B9C4CD;}
.footer-links a:hover{color:var(--primary);}
.footer-bottom{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;padding:22px 0 84px;font-size:13px;color:#8B98A3;}
.footer-bottom a{color:#B9C4CD;}
.footer-bottom a:hover{color:var(--primary);}

/* ============ 悬浮 CTA ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:1040;
  display:inline-flex;align-items:center;gap:8px;height:50px;padding:0 22px;
  background:var(--primary);color:#06231C;border:1.5px solid var(--ink);border-radius:var(--r-p);
  font-weight:700;font-size:15px;box-shadow:0 14px 30px -14px rgba(0,211,167,.8);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .22s ease-out,transform .22s ease-out,visibility .22s ease-out,background .18s ease-out;
}
.float-cta.is-visible{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--primary-dark);color:#04201A;}
.mobile-bar{display:none;}

/* ============ Offcanvas 移动菜单 ============ */
.offcanvas.retro-drawer{width:84%;max-width:340px;background:#fff;border-left:1.5px solid var(--line);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line);}
.drawer-body{padding:18px 20px 28px;}
.drawer-nav{display:grid;gap:4px;margin-bottom:22px;}
.drawer-nav a{padding:13px 12px;border-radius:var(--r-s);font-size:15.5px;color:var(--t2);border:1px solid transparent;}
.drawer-nav a:hover,.drawer-nav a.is-active{background:var(--primary-08);color:var(--t1);border-color:var(--primary-16);font-weight:600;}
.drawer-note{font-size:13px;color:var(--t2);border-top:1px solid var(--line);padding-top:16px;}
.drawer-note .topbar-dom{color:var(--primary-dark);}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .container-xxl{padding:0 18px;}
  .hero-in{gap:40px;padding:72px 0 64px;}
  .section{padding:80px 0;}
}
@media (max-width:991.98px){
  .topbar{display:none;}
  .main-nav{display:none;}
  .hamburger{display:inline-flex;}
  .nav-cta .btn-main{display:none;}
  .anchor-bar{top:58px;}
  .hero-in{grid-template-columns:1fr;padding:64px 0 56px;}
  .hero-sub{font-size:16.5px;}
  .demo-grid{grid-template-columns:1fr;gap:32px;}
  .stat-grid{grid-template-columns:repeat(2,1fr);}
  .quote-grid{grid-template-columns:1fr;}
  .price-grid{grid-template-columns:1fr;}
  .faq-grid{grid-template-columns:1fr;gap:28px;}
  .faq-side{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .section{padding:72px 0;}
}
@media (max-width:767.98px){
  body{font-size:15px;padding-bottom:64px;}
  .section{padding:48px 0;}
  .sec-head{margin-bottom:32px;}
  .hero-in{padding:52px 0 44px;}
  .hero h1{font-size:clamp(26px,7.4vw,34px);}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%;}
  .hero-card{padding:14px;}
  .hero-facts{gap:18px;}
  .card-b{padding:22px;}
  .price-card{padding:26px 22px;}
  .float-cta{display:none;}
  .mobile-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:1040;align-items:center;justify-content:space-between;
    gap:12px;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:var(--ink);border-top:1px solid var(--line-dark);
  }
  .mobile-bar span{font-size:13px;color:#B9C4CD;}
  .mobile-bar .btn-main{height:42px;padding:0 18px;font-size:14.5px;box-shadow:none;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{padding-bottom:96px;}
  .faq-a{padding-right:12px;}
}
@media (max-width:575.98px){
  .stat-grid{grid-template-columns:1fr;}
  .anchor-in a{padding:13px 12px;font-size:13.5px;}
  .post-body{padding:18px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --stage:#0B0F12;
  --stage-2:#151A1F;
  --paper:#F6F7F9;
  --card:#FFFFFF;
  --brand:#00D3A7;
  --brand-d:#00A37F;
  --brand-soft:rgba(0,211,167,.08);
  --brand-line:rgba(0,211,167,.16);
  --accent:#FF6B2C;
  --violet:#7C5CFF;
  --sky:#2E9BFF;
  --ink:#14181C;
  --ink-2:#5A646E;
  --ink-3:#8A939C;
  --line:#E6E9ED;
  --line-dark:rgba(255,255,255,.08);
  --on-dark:#F2F5F7;
  --on-dark-2:#A8B3BD;
  --r-s:8px;
  --r-m:14px;
  --r-l:20px;
  --sh-1:0 1px 2px rgba(11,15,18,.06),0 8px 24px -12px rgba(11,15,18,.12);
  --sh-2:0 16px 40px -16px rgba(0,211,167,.28);
  --t:.2s ease-out;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--card);
}
img{max-width:100%;height:auto;display:block}
a{color:var(--ink);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--brand-d)}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.25;font-weight:700}
p{margin:0 0 1.1em}
ul,ol{margin:0 0 1.1em;padding-left:1.15em}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand-d);font-weight:700;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);display:block}
.section{padding:96px 0}
.section--alt{background:var(--paper)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;margin-bottom:14px}
.section-head h2::before{
  content:"";display:block;width:36px;height:4px;border-radius:2px;background:var(--brand);margin-bottom:14px;
}
.section-head p{color:var(--ink-2);font-size:16px;margin:0}

/* ---------- 顶部信息条 ---------- */
.topbar{background:var(--stage);color:var(--on-dark-2);font-size:13px}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px}
.topbar-left{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.topbar-left .host{color:var(--on-dark);font-weight:600;letter-spacing:.04em}
.topbar-left .divider{width:1px;height:13px;background:var(--line-dark)}
.topbar-right a{color:var(--brand);font-weight:600}
.topbar-right a:hover{color:var(--on-dark)}

/* ---------- 主导航 ---------- */
header.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 1px 2px rgba(11,15,18,.04)}
.nav-inner{display:flex;align-items:center;gap:24px;min-height:68px}
.brand-text{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:.01em;white-space:nowrap}
.brand-mark{
  width:30px;height:30px;border-radius:var(--r-s);background:var(--stage);
  display:grid;place-items:center;color:var(--brand);font-size:14px;font-weight:800;flex:none;
}
.brand-text span.sub{font-size:11px;letter-spacing:.12em;color:var(--ink-3);font-weight:600;text-transform:uppercase}
.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto}
.main-nav a{position:relative;font-size:15px;color:var(--ink-2);padding:22px 0;white-space:nowrap}
.main-nav a::after{
  content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;transition:transform var(--t);
}
.main-nav a:hover{color:var(--ink)}
.main-nav a:hover::after,.main-nav a.is-active::after{transform:scaleX(1)}
.main-nav a.is-active{color:var(--ink);font-weight:600}
.nav-cta{
  margin-left:12px;display:inline-flex;align-items:center;gap:8px;
  background:var(--brand);color:#04231C;font-weight:700;font-size:14px;
  padding:11px 20px;border-radius:999px;border:1px solid var(--brand);
  transition:all var(--t);
}
.nav-cta:hover{background:var(--brand-d);border-color:var(--brand-d);color:#fff}
.nav-toggle{
  margin-left:auto;display:none;width:44px;height:44px;border-radius:var(--r-s);
  border:1px solid var(--line);background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:19px;height:2px;background:var(--ink);border-radius:2px}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84%;max-width:360px;background:#fff;z-index:90;
  transform:translateX(102%);transition:transform .24s ease-out;padding:24px;overflow-y:auto;
  border-left:1px solid var(--line);box-shadow:-18px 0 40px -20px rgba(11,15,18,.3);
}
.drawer.is-open{transform:translateX(0)}
.drawer h4{font-size:13px;letter-spacing:.12em;color:var(--ink-3);margin:22px 0 10px;text-transform:uppercase}
.drawer a.drawer-link{display:block;padding:13px 14px;border-radius:var(--r-s);color:var(--ink);font-size:15px;margin-bottom:4px;background:var(--paper)}
.drawer a.drawer-link:hover,.drawer a.drawer-link.is-active{background:var(--brand-soft);color:var(--brand-d);font-weight:600}
.drawer-close{position:absolute;top:16px;right:16px;width:38px;height:38px;border-radius:var(--r-s);border:1px solid var(--line);background:#fff;font-size:18px;line-height:1}
.overlay{position:fixed;inset:0;background:rgba(11,15,18,.5);z-index:80;opacity:0;visibility:hidden;transition:opacity var(--t)}
.overlay.is-open{opacity:1;visibility:visible}

/* ---------- 面包屑 ---------- */
.crumbs{font-size:13px;color:var(--ink-3);padding:22px 0 0}
.crumbs a{color:var(--ink-2)}
.crumbs .sep{margin:0 7px;color:var(--ink-3)}
.crumbs .now{color:var(--ink-2)}

/* ---------- 文章头 ---------- */
.article-hero{
  position:relative;background:linear-gradient(105deg,rgba(11,15,18,.94) 0%,rgba(11,15,18,.86) 46%,rgba(11,15,18,.6) 100%),
  url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
  color:var(--on-dark);border-radius:var(--r-l);overflow:hidden;margin:22px 0 0;
  padding:44px 44px 40px;
}
.article-hero::after{
  content:"";position:absolute;inset:auto -60px -120px auto;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,211,167,.28),transparent 68%);
}
.article-hero .kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);font-weight:700;margin-bottom:16px;
}
.article-hero h1{
  font-size:clamp(26px,3.4vw,38px);font-weight:800;line-height:1.28;color:#fff;max-width:900px;
}
.article-hero h1::after{content:"";display:block;width:64px;height:4px;border-radius:2px;background:var(--brand);margin-top:20px}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;margin-top:24px;font-size:13px;color:var(--on-dark-2)}
.meta-row .dot{width:1px;height:13px;background:var(--line-dark)}
.badge-cat{
  display:inline-flex;align-items:center;gap:6px;background:var(--brand-soft);color:var(--brand);
  border:1px solid var(--brand-line);border-radius:999px;padding:5px 13px;font-size:12px;font-weight:700;
}
.badge-soft{background:var(--paper);color:var(--ink-2);border:1px solid var(--line);border-radius:999px;padding:5px 12px;font-size:12px;font-weight:600}

/* ---------- 文章布局 ---------- */
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;padding:56px 0 0;align-items:start}
.article-main{min-width:0;max-width:820px}
.prose{font-size:17px;line-height:1.9;color:#22282E}
.prose p{margin-bottom:1.25em}
.prose h2{
  position:relative;font-size:clamp(21px,2.2vw,27px);font-weight:700;color:var(--ink);
  margin:2.2em 0 .8em;padding-left:16px;
}
.prose h2::before{content:"";position:absolute;left:0;top:.18em;bottom:.18em;width:4px;border-radius:2px;background:var(--brand)}
.prose h3{font-size:20px;font-weight:600;margin:1.9em 0 .7em;color:var(--ink)}
.prose a{color:var(--brand-d);text-decoration:underline;text-underline-offset:3px}
.prose a:hover{color:var(--accent)}
.prose ul,.prose ol{padding-left:1.3em;margin-bottom:1.3em}
.prose li{margin-bottom:.55em}
.prose img{border-radius:var(--r-m);margin:1.6em 0}
.prose blockquote{
  margin:1.8em 0;padding:20px 24px;background:var(--brand-soft);
  border-left:4px solid var(--brand);border-radius:var(--r-s);color:#1D2A26;
}
.prose blockquote p:last-child{margin-bottom:0}
.prose table{width:100%;border-collapse:collapse;margin:1.8em 0;font-size:15px}
.prose th,.prose td{border-bottom:1px solid var(--line);padding:12px 14px;text-align:left}
.prose th{background:var(--paper);font-weight:700}
.prose code{background:var(--paper);padding:2px 6px;border-radius:6px;font-size:15px}
.figcap{font-size:13px;color:var(--ink-3);text-align:center;margin:-.8em 0 1.8em}

.article-cover{border-radius:var(--r-l);overflow:hidden;margin:0 0 32px;border:1px solid var(--line)}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover}

/* ---------- 侧栏 TOC ---------- */
.side-col{position:sticky;top:96px;display:flex;flex-direction:column;gap:22px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r-m);padding:22px;box-shadow:var(--sh-1)}
.panel h3{font-size:14px;letter-spacing:.06em;color:var(--ink);margin-bottom:14px;font-weight:700}
.toc-list{list-style:none;margin:0;padding:0;border-left:2px solid var(--line)}
.toc-list li{margin:0}
.toc-list a{display:block;padding:8px 0 8px 14px;font-size:14px;color:var(--ink-2);border-left:2px solid transparent;margin-left:-2px}
.toc-list a:hover{color:var(--brand-d);border-left-color:var(--brand)}
.panel-cta{background:var(--stage);border-color:var(--line-dark)}
.panel-cta h3{color:#fff}
.panel-cta p{color:var(--on-dark-2);font-size:14px;margin-bottom:16px}
.panel-muted{background:var(--paper);box-shadow:none}

/* ---------- 按钮 ---------- */
.btn-brand,.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:999px;font-size:15px;font-weight:700;
  border:1px solid transparent;cursor:pointer;transition:all var(--t);
}
.btn-brand{background:var(--brand);border-color:var(--brand);color:#04231C}
.btn-brand:hover{background:var(--brand-d);border-color:var(--brand-d);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2)}
.btn-brand:active{transform:translateY(1px)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-d);background:var(--brand-soft)}
.btn-ghost.on-dark{border-color:var(--line-dark);color:var(--on-dark)}
.btn-ghost.on-dark:hover{border-color:var(--brand);color:var(--brand);background:rgba(0,211,167,.12)}
.btn-block{width:100%}

/* ---------- 文章尾 ---------- */
.article-foot{margin-top:40px;padding-top:24px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between}
.prevnext{display:flex;flex-wrap:wrap;gap:18px;font-size:14px;color:var(--ink-2)}
.prevnext a{color:var(--brand-d);font-weight:600}
.empty-state{
  text-align:center;padding:64px 24px;border:1px dashed var(--line);border-radius:var(--r-l);background:var(--paper);
}
.empty-state .ico{
  width:52px;height:52px;border-radius:var(--r-m);background:#fff;border:1px solid var(--line);
  display:grid;place-items:center;margin:0 auto 16px;color:var(--brand-d);font-weight:800;
}
.empty-state h2{font-size:20px;margin-bottom:10px}
.empty-state p{color:var(--ink-2);margin-bottom:20px}

/* ---------- 卡片 ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-m);
  box-shadow:var(--sh-1);overflow:hidden;transition:all var(--t);display:flex;flex-direction:column;height:100%;
}
.card:hover{transform:translateY(-4px);border-color:rgba(0,211,167,.4);box-shadow:var(--sh-2)}
.card-media img{width:100%;aspect-ratio:16/9;object-fit:cover}
.card-body{padding:24px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:18px;font-weight:700;line-height:1.45}
.card-body p{font-size:14px;color:var(--ink-2);margin:0}
.card-meta{margin-top:auto;font-size:13px;color:var(--ink-3);display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.tag{
  display:inline-block;background:var(--brand-soft);color:var(--brand-d);border:1px solid var(--brand-line);
  border-radius:999px;padding:4px 11px;font-size:12px;font-weight:700;
}
.tag-warm{background:rgba(255,107,44,.1);color:#C64A15;border-color:rgba(255,107,44,.24)}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;background:var(--stage);color:var(--on-dark);border-radius:var(--r-l);
  padding:56px 48px;overflow:hidden;text-align:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.05;
  background-image:radial-gradient(rgba(255,255,255,.9) 1px,transparent 1px);background-size:18px 18px;
}
.cta-band h2{position:relative;font-size:clamp(23px,2.6vw,32px);color:#fff;margin-bottom:14px}
.cta-band p{position:relative;color:var(--on-dark-2);max-width:620px;margin:0 auto 26px}
.cta-actions{position:relative;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--stage);color:var(--on-dark-2);padding:72px 0 72px;margin-top:96px}
.site-footer .foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:36px;border-top:1px solid var(--line-dark);padding-top:44px}
.site-footer .brand-text{color:#fff;margin-bottom:14px}
.site-footer .brand-text span.sub{color:var(--on-dark-2)}
.site-footer p{font-size:14px;color:var(--on-dark-2);line-height:1.8}
.site-footer h4{font-size:14px;color:#fff;letter-spacing:.06em;margin-bottom:16px;font-weight:700}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:11px}
.site-footer a{color:var(--on-dark-2);font-size:14px}
.site-footer a:hover{color:var(--brand)}
.foot-domain{font-size:13px;color:var(--ink-3);letter-spacing:.04em}
.subscribe{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.subscribe input{
  flex:1;min-width:150px;height:46px;border-radius:10px;border:1px solid var(--line-dark);
  background:#12171C;color:#fff;padding:0 14px;font-size:14px;
}
.subscribe input::placeholder{color:#77828C}
.subscribe input:focus{outline:none;border-color:var(--brand);background:rgba(0,211,167,.08)}
.foot-bottom{
  margin-top:32px;padding-top:22px;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:12px 22px;align-items:center;justify-content:space-between;font-size:13px;
}
.foot-bottom .links{display:flex;flex-wrap:wrap;gap:18px}

/* ---------- 悬浮 CTA ---------- */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;display:inline-flex;align-items:center;gap:8px;
  background:var(--brand);color:#04231C;font-weight:700;font-size:14px;padding:13px 22px;border-radius:999px;
  box-shadow:0 16px 40px -16px rgba(0,211,167,.5);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all var(--t);
}
.float-cta.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--brand-d);color:#fff}
.float-bar{display:none}

@media (max-width:1200px){
  .article-wrap{grid-template-columns:minmax(0,1fr) 268px;gap:36px}
  .section{padding:80px 0}
}
@media (max-width:992px){
  .section{padding:72px 0}
  .article-hero{padding:36px 30px 32px}
  .article-wrap{grid-template-columns:1fr;gap:36px;padding-top:40px}
  .side-col{position:static;order:2}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-footer .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .main-nav,.nav-cta{display:none}
  .nav-toggle{display:flex}
  .topbar .container{min-height:34px}
}
@media (max-width:768px){
  .container{padding:0 18px}
  .section{padding:56px 0}
  body{font-size:15px}
  .prose{font-size:16px}
  .article-hero{border-radius:var(--r-m);padding:30px 22px 26px;margin-top:16px}
  .cta-band{padding:40px 22px;border-radius:var(--r-m)}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .site-footer{padding:56px 0 64px;margin-top:64px}
  .site-footer .foot-grid{grid-template-columns:1fr;gap:28px}
  .card-body{padding:20px}
}
@media (max-width:575px){
  .topbar{display:none}
  .nav-inner{min-height:60px}
  .brand-text{font-size:16px}
  .article-hero h1{font-size:23px}
  .meta-row{font-size:12px}
  .float-cta{display:none}
  .float-bar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:70;background:var(--stage);
    padding:9px 16px calc(9px + env(safe-area-inset-bottom));align-items:center;justify-content:space-between;gap:12px;
  }
  .float-bar span{color:var(--on-dark-2);font-size:13px}
  .float-bar a{background:var(--brand);color:#04231C;font-weight:700;font-size:14px;padding:10px 18px;border-radius:999px}
  .site-footer{padding-bottom:96px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --brand:#00D3A7;
  --brand-deep:#00A37F;
  --brand-08:rgba(0,211,167,.08);
  --brand-16:rgba(0,211,167,.16);
  --accent:#FF6B2C;
  --stage:#0B0F12;
  --dark-card:#151A1F;
  --bg:#F6F7F9;
  --card:#FFFFFF;
  --ink:#14181C;
  --ink-2:#5A646E;
  --ink-dark:#F2F5F7;
  --ink-dark-2:#A8B3BD;
  --line:#E6E9ED;
  --line-dark:rgba(255,255,255,.08);
  --r-card:14px;
  --r-pill:999px;
  --shadow:0 1px 2px rgba(11,15,18,.06),0 8px 24px -12px rgba(11,15,18,.12);
  --shadow-hover:0 16px 40px -16px rgba(0,211,167,.28);
  --sec:96px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Hiragino Sans GB",sans-serif;
  --font-num:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .18s ease-out}
a:hover{color:var(--brand-deep)}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.sec{padding:var(--sec) 0}
.sec-alt{background:#fff}
.sec-dark{background:var(--stage);color:var(--ink-dark)}

/* 顶部信息条 */
.topbar{background:var(--stage);color:var(--ink-dark-2);font-size:13px;letter-spacing:.02em}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px}
.topbar-left{display:flex;align-items:center;gap:14px;min-width:0}
.topbar-left .dot{width:6px;height:6px;border-radius:50%;background:var(--brand);flex:0 0 auto}
.topbar-sep{width:1px;height:14px;background:rgba(255,255,255,.18)}
.topbar-tip{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar a.topbar-cta{color:var(--brand);font-weight:600;white-space:nowrap}
.topbar a.topbar-cta:hover{color:#fff}

/* 主导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 2px rgba(11,15,18,.04);
  transition:height .2s ease-out, box-shadow .2s ease-out;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:70px}
.logo{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink)}
.logo:hover{color:var(--ink)}
.logo-mark{
  width:30px;height:30px;flex:0 0 auto;border-radius:9px;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-deep) 100%);
  position:relative;
}
.logo-mark::after{
  content:"";position:absolute;inset:9px 7px 9px 9px;
  border-left:2px solid #05241d;border-top:2px solid #05241d;border-bottom:2px solid #05241d;
  border-radius:2px 0 0 2px;
}
.logo em{font-style:normal;color:var(--brand-deep)}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{
  position:relative;display:inline-block;
  padding:10px 14px;font-size:15px;font-weight:500;color:var(--ink-2);
  border-radius:var(--r-pill);
}
.main-nav a:hover{color:var(--ink);background:var(--brand-08)}
.main-nav a.is-active{color:var(--ink);font-weight:700}
.main-nav a.is-active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  background:var(--brand);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;cursor:pointer;
  font-size:15px;font-weight:600;line-height:1;
  padding:14px 24px;border-radius:var(--r-pill);
  transition:transform .18s ease-out,background-color .18s ease-out,box-shadow .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#04302a;box-shadow:0 10px 24px -14px rgba(0,211,167,.9)}
.btn-primary:hover{background:var(--brand-deep);color:#03211d;box-shadow:0 14px 30px -14px rgba(0,211,167,.75)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-deep);background:var(--brand-08)}
.btn-light{background:#fff;color:var(--ink)}
.btn-light:hover{background:var(--brand);color:#04302a}
.btn-line{background:transparent;color:var(--ink-dark);border-color:rgba(255,255,255,.28)}
.btn-line:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{padding:11px 20px;font-size:14px}
.btn-block{width:100%}
.nav-toggle{
  display:none;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  width:44px;height:44px;align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* 抽屉 */
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84%;max-width:340px;
  background:#fff;z-index:120;padding:24px;
  transform:translateX(105%);transition:transform .22s ease-out;
  overflow-y:auto;box-shadow:-20px 0 40px -24px rgba(11,15,18,.4);
}
.drawer.is-open{transform:translateX(0)}
.drawer-close{
  background:var(--bg);border:1px solid var(--line);border-radius:var(--r-card);
  width:40px;height:40px;font-size:20px;line-height:1;color:var(--ink);cursor:pointer;
}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:20px}
.drawer-nav a{padding:13px 14px;border-radius:var(--r-card);font-size:15px;color:var(--ink-2);font-weight:500}
.drawer-nav a:hover{background:var(--brand-08);color:var(--ink)}
.drawer-nav a.is-active{background:var(--brand-08);color:var(--brand-deep);font-weight:700}
.drawer-meta{border-top:1px solid var(--line);padding-top:16px;font-size:13px;color:var(--ink-2);display:flex;flex-direction:column;gap:8px}
.mask{
  position:fixed;inset:0;background:rgba(11,15,18,.45);z-index:110;
  opacity:0;visibility:hidden;transition:opacity .22s ease-out,visibility .22s ease-out;
}
.mask.is-open{opacity:1;visibility:visible}

/* 面包屑 */
.crumb{font-size:13px;color:var(--ink-2);padding:22px 0 0}
.crumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.crumb li{display:flex;align-items:center;gap:8px}
.crumb li::after{content:"›";color:#B7C0C8}
.crumb li:last-child::after{display:none}
.crumb a:hover{color:var(--brand-deep)}
.crumb .current{color:var(--ink);font-weight:600}

/* Hero */
.cat-hero{
  position:relative;overflow:hidden;
  background-color:var(--stage);
  background-image:linear-gradient(100deg,rgba(11,15,18,.94) 0%,rgba(11,15,18,.82) 45%,rgba(11,15,18,.42) 100%),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  color:var(--ink-dark);
  padding:72px 0 76px;
}
.cat-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:22px 22px;opacity:.6;
}
.cat-hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:48px;align-items:center}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 15px;border-radius:var(--r-pill);
  font-size:13px;font-weight:700;letter-spacing:.04em;
  background:var(--brand-16);color:var(--brand);border:1px solid rgba(0,211,167,.34);
}
.badge-accent{background:rgba(255,107,44,.14);color:var(--accent);border-color:rgba(255,107,44,.32)}
.cat-hero h1{
  font-size:clamp(30px,4.4vw,50px);line-height:1.22;font-weight:800;
  margin:20px 0 18px;letter-spacing:-.01em;
}
.cat-hero h1 .hl{
  display:inline-block;position:relative;
  background:linear-gradient(transparent 66%,rgba(0,211,167,.42) 66%);
}
.cat-hero .lead{font-size:18px;color:#D7DEE4;max-width:560px}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-note{display:flex;flex-wrap:wrap;gap:24px;margin-top:34px;padding-top:24px;border-top:1px solid var(--line-dark)}
.hero-note div{font-size:14px;color:var(--ink-dark-2)}
.hero-note b{display:block;font-size:22px;font-weight:800;color:var(--brand);font-family:var(--font-num);letter-spacing:.02em}
.hero-card{
  background:rgba(21,26,31,.82);
  border:1px solid var(--line-dark);
  border-radius:var(--r-card);
  padding:22px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.hero-card img{border-radius:var(--r-card);aspect-ratio:16/9;object-fit:cover;width:100%}
.hero-card h2{font-size:17px;font-weight:700;margin:18px 0 12px;color:#fff}
.check-list{display:flex;flex-direction:column;gap:12px}
.check-list li{position:relative;padding-left:26px;font-size:14px;color:var(--ink-dark-2);line-height:1.7}
.check-list li::before{
  content:"";position:absolute;left:0;top:8px;width:12px;height:8px;
  border-left:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(-45deg);
}

/* 通用标题 */
.sec-head{max-width:760px;margin-bottom:48px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;
  color:var(--brand-deep);letter-spacing:.08em;text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--brand);border-radius:2px}
h2.sec-title{font-size:clamp(24px,3vw,34px);font-weight:700;line-height:1.35;letter-spacing:-.01em}
.sec-title .bar{
  display:inline-block;width:4px;height:.78em;background:var(--brand);
  border-radius:2px;margin-right:12px;vertical-align:-2px;
}
.sec-desc{margin-top:16px;color:var(--ink-2);font-size:16px;line-height:1.9}

/* 图文交错 */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;align-items:center}
.split.rev .split-media{order:2}
.split-media img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:var(--r-card);border:1px solid var(--line);box-shadow:var(--shadow);
}
.split-body h3{font-size:22px;font-weight:700;margin-bottom:14px}
.split-body p{color:var(--ink-2);margin-bottom:16px}
.mini-list{display:flex;flex-direction:column;gap:14px;margin-top:6px}
.mini-list li{
  display:flex;gap:12px;align-items:flex-start;
  padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  transition:box-shadow .18s ease-out,transform .18s ease-out,border-color .18s ease-out;
}
.mini-list li:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(0,211,167,.3)}
.mini-list .idx{
  flex:0 0 auto;width:26px;height:26px;border-radius:var(--r-pill);
  background:var(--brand-08);color:var(--brand-deep);
  font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center;
  font-family:var(--font-num);margin-top:4px;
}
.mini-list strong{display:block;font-size:15px;font-weight:700;margin-bottom:2px}
.mini-list span{font-size:14px;color:var(--ink-2);line-height:1.75}

/* 编号步骤 */
.steps{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.step{
  position:relative;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:26px 26px 26px 84px;
  transition:transform .18s ease-out,box-shadow .18s ease-out,border-color .18s ease-out;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(0,211,167,.3)}
.step .num{
  position:absolute;left:24px;top:26px;
  width:42px;height:42px;border-radius:var(--r-pill);
  background:var(--stage);color:var(--brand);
  font-family:var(--font-num);font-size:16px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
}
.step h3{font-size:18px;font-weight:700;margin-bottom:8px}
.step p{font-size:14px;color:var(--ink-2);line-height:1.8}
.step .tag{
  display:inline-block;margin-top:14px;font-size:12px;
  padding:5px 12px;border-radius:var(--r-pill);
  background:var(--brand-08);color:var(--brand-deep);font-weight:700;
}

/* 提示条 */
.notice{
  display:flex;gap:16px;align-items:flex-start;
  background:var(--brand-08);border:1px solid rgba(0,211,167,.28);
  border-left:4px solid var(--brand);
  border-radius:var(--r-card);padding:20px 22px;margin-top:32px;
}
.notice b{color:var(--brand-deep);font-size:15px}
.notice p{font-size:14px;color:var(--ink-2);line-height:1.8}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}
.stat{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;text-align:left;
}
.stat .fig{font-family:var(--font-num);font-size:clamp(32px,4vw,44px);font-weight:800;color:var(--brand-deep);line-height:1.1;letter-spacing:-.01em}
.stat .fig small{font-size:15px;font-weight:700;margin-left:4px;color:var(--ink-2);font-family:var(--font)}
.stat p{margin-top:10px;font-size:14px;color:var(--ink-2);line-height:1.75}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.6fr);gap:48px;align-items:start}
.faq-side{position:sticky;top:96px}
.faq-side .card-help{
  margin-top:26px;background:var(--stage);color:var(--ink-dark);
  border-radius:var(--r-card);padding:26px;border:1px solid var(--line-dark);
}
.card-help h4{font-size:17px;font-weight:700;margin-bottom:10px;color:#fff}
.card-help p{font-size:14px;color:var(--ink-dark-2);margin-bottom:18px}
.faq-list{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item:last-child{border-bottom:0}
.faq-item summary{
  list-style:none;cursor:pointer;position:relative;
  padding:20px 62px 20px 22px;font-size:16px;font-weight:600;color:var(--ink);
  transition:color .18s ease-out,background-color .18s ease-out;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:transparent;transition:background-color .18s ease-out;
}
.faq-item summary::after{
  content:"";position:absolute;right:24px;top:50%;width:13px;height:13px;
  transform:translateY(-50%);
  background:
    linear-gradient(var(--brand-deep),var(--brand-deep)) center/13px 2px no-repeat,
    linear-gradient(var(--brand-deep),var(--brand-deep)) center/2px 13px no-repeat;
  transition:transform .18s ease-out,opacity .18s ease-out;
}
.faq-item[open] summary{color:var(--brand-deep);background:var(--brand-08)}
.faq-item[open] summary::before{background:var(--brand)}
.faq-item[open] summary::after{
  background:linear-gradient(var(--brand-deep),var(--brand-deep)) center/13px 2px no-repeat;
}
.faq-item:hover summary{color:var(--brand-deep)}
.faq-body{padding:0 26px 22px 25px;font-size:15px;color:var(--ink-2);line-height:1.9}

/* CTA 带 */
.cta-band{
  position:relative;background-color:var(--stage);color:var(--ink-dark);
  padding:84px 0;overflow:hidden;
}
.cta-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:24px 24px;
}
.cta-band .container{position:relative;z-index:2;text-align:center}
.cta-band h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;line-height:1.3;margin-bottom:16px}
.cta-band p{color:var(--ink-dark-2);font-size:16px;max-width:620px;margin:0 auto}
.cta-band .hero-btns{justify-content:center;margin-top:32px}

/* 页脚 */
.site-footer{background:var(--stage);color:var(--ink-dark-2);padding:72px 0 0;border-top:1px solid var(--line-dark)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand .logo:hover{color:#fff}
.footer-brand p{font-size:14px;line-height:1.85;max-width:320px}
.footer-domain{
  display:inline-block;margin-top:16px;font-family:var(--font-num);font-size:13px;
  letter-spacing:.04em;color:var(--brand);padding:6px 12px;
  border:1px solid rgba(0,211,167,.32);border-radius:var(--r-pill);
}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col a{font-size:14px;color:var(--ink-dark-2)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  margin-top:56px;border-top:1px solid var(--line-dark);
  padding:24px 0 88px;
  display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;
  font-size:13px;
}
.footer-bottom .links{display:flex;flex-wrap:wrap;gap:18px}
.footer-bottom a:hover{color:var(--brand)}

/* 悬浮 CTA */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:90;
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand);color:#04302a;font-weight:700;font-size:14px;
  padding:15px 22px;border-radius:var(--r-pill);
  box-shadow:0 16px 34px -16px rgba(0,211,167,.95);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s ease-out,background-color .18s ease-out;
}
.float-cta.is-show{opacity:1;visibility:visible;transform:translateY(0)}
.float-cta:hover{background:var(--brand-deep);color:#03211d}
.float-bar{display:none}

/* 响应式 */
@media (max-width:1199px){
  .container{padding:0 22px}
}
@media (max-width:991px){
  :root{--sec:72px}
  .main-nav{display:none}
  .header-actions .btn-primary{display:none}
  .nav-toggle{display:flex}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .split{grid-template-columns:1fr;gap:28px}
  .split.rev .split-media{order:0}
  .faq-wrap{grid-template-columns:1fr;gap:32px}
  .faq-side{position:static}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}
@media (max-width:767px){
  body{font-size:15px}
  .topbar{display:none}
  .cat-hero{padding:52px 0 56px}
  .cat-hero .lead{font-size:16px}
  .steps{grid-template-columns:1fr}
  .sec-head{margin-bottom:32px}
  .stat{padding:20px}
  .faq-item summary{padding:17px 52px 17px 18px;font-size:15px}
  .faq-body{padding:0 20px 20px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{padding-bottom:96px}
  .float-cta{display:none}
  .float-bar{
    display:flex;align-items:center;justify-content:space-between;gap:14px;
    position:fixed;left:0;right:0;bottom:0;z-index:95;
    background:rgba(11,15,18,.96);
    padding:10px 16px calc(10px + env(safe-area-inset-bottom));
    border-top:1px solid var(--line-dark);
  }
  .float-bar span{font-size:13px;color:var(--ink-dark-2)}
  .float-bar .btn{padding:11px 18px;font-size:14px}
}
@media (max-width:575px){
  .container{padding:0 16px}
  .hero-note{gap:18px}
  .hero-note b{font-size:19px}
  .cat-hero h1{font-size:clamp(26px,7.4vw,34px)}
  .stats{grid-template-columns:1fr}
  .step{padding:22px 20px 22px 20px}
  .step .num{position:static;margin-bottom:14px}
  .btn{width:100%}
  .hero-btns .btn{width:100%}
  .float-bar .btn{width:auto}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --brand:#00D3A7;
  --brand-dark:#00A37F;
  --brand-08:rgba(0,211,167,.08);
  --brand-16:rgba(0,211,167,.16);
  --accent:#FF6B2C;
  --accent-16:rgba(255,107,44,.16);
  --stage:#0B0F12;
  --stage-card:#151A1F;
  --paper:#F6F7F9;
  --card:#FFFFFF;
  --ink:#14181C;
  --ink-2:#5A646E;
  --ink-light:#F2F5F7;
  --ink-light-2:#A8B3BD;
  --line:#E6E9ED;
  --line-dark:rgba(255,255,255,.08);
  --r-sm:8px;
  --r-card:14px;
  --r-lg:20px;
  --sh:0 1px 2px rgba(11,15,18,.06),0 8px 24px -12px rgba(11,15,18,.12);
  --sh-hover:0 16px 40px -16px rgba(0,211,167,.28);
  --sec:96px;
  --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --bs-primary:#00D3A7;
  --bs-body-font-family:var(--font);
  --bs-link-color:#00A37F;
  --bs-link-hover-color:#00D3A7;
  --bs-border-radius:14px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand-dark);text-decoration:none;transition:color .2s ease-out,opacity .2s ease-out}
a:hover{color:var(--brand)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand);
  outline-offset:2px;
  border-radius:4px;
}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0 0 .6em;font-weight:700;line-height:1.3;color:var(--ink)}
h1{font-size:clamp(30px,4.6vw,46px);font-weight:800;line-height:1.22}
h2{font-size:clamp(24px,3vw,34px);font-weight:700}
h3{font-size:clamp(18px,2vw,21px);font-weight:600}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0 0 1.1em;padding-left:1.15em}
li{margin-bottom:.4em}
.container,.container-fluid{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}
.row{--bs-gutter-x:24px;--bs-gutter-y:24px}
.section{padding:var(--sec) 0}
.section-sm{padding:64px 0}
.section-paper{background:var(--paper)}
.section-white{background:#fff}
.section-stage{background:var(--stage);color:var(--ink-light)}
.section-stage h2,.section-stage h3{color:var(--ink-light)}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--brand-dark);
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px;
  height:2px;
  background:var(--brand);
  display:inline-block;
}
.section-title{position:relative;padding-left:16px;margin-bottom:14px}
.section-title::before{
  content:"";
  position:absolute;
  left:0;
  top:.16em;
  bottom:.16em;
  width:4px;
  border-radius:2px;
  background:var(--brand);
}
.section-lead{
  color:var(--ink-2);
  font-size:16px;
  max-width:760px;
  margin-bottom:36px;
}
.section-stage .section-lead{color:var(--ink-light-2)}

/* ===== 顶部信息条 ===== */
.info-bar{
  background:var(--stage);
  color:var(--ink-light-2);
  font-size:12.5px;
  letter-spacing:.02em;
  line-height:1.6;
}
.info-bar .container{
  min-height:38px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding-top:6px;
  padding-bottom:6px;
}
.info-left{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.info-domain{
  font-family:var(--mono);
  letter-spacing:.06em;
  color:var(--brand);
}
.info-divider{width:1px;height:12px;background:var(--line-dark);display:inline-block}
.info-bar a{color:var(--ink-light);border-bottom:1px solid transparent}
.info-bar a:hover{color:var(--brand);border-bottom-color:var(--brand)}

/* ===== 主导航 ===== */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 2px rgba(11,15,18,.04);
}
.nav-inner{
  display:flex;
  align-items:center;
  gap:24px;
  min-height:70px;
  padding-top:8px;
  padding-bottom:8px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:17px;
  color:var(--ink);
  letter-spacing:.01em;
  white-space:nowrap;
}
.brand:hover{color:var(--ink)}
.brand-mark{
  width:32px;
  height:32px;
  border-radius:var(--r-sm);
  background:var(--stage);
  border:1px solid var(--brand);
  display:grid;
  place-items:center;
  color:var(--brand);
  font-family:var(--mono);
  font-size:13px;
  font-weight:700;
  flex:0 0 auto;
}
.brand-sub{
  display:block;
  font-size:11px;
  font-weight:500;
  color:var(--ink-2);
  font-family:var(--mono);
  letter-spacing:.08em;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
  flex-wrap:wrap;
}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  font-size:15px;
  color:var(--ink-2);
  font-weight:500;
  border-radius:var(--r-sm);
  transition:color .2s ease-out,background .2s ease-out;
}
.main-nav a:hover{color:var(--ink);background:var(--brand-08)}
.main-nav a.is-active{color:var(--ink);font-weight:600}
.main-nav a.is-active::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:0;
  height:2px;
  border-radius:2px;
  background:var(--brand);
}
.nav-cta{margin-left:8px}
.nav-toggle{
  display:none;
  margin-left:auto;
  width:44px;
  height:44px;
  border:1px solid var(--line);
  border-radius:var(--r-sm);
  background:#fff;
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;
  left:12px;
  width:20px;
  height:2px;
  background:var(--ink);
  border-radius:2px;
  transition:transform .2s ease-out,opacity .2s ease-out;
}
.nav-toggle span{top:21px}
.nav-toggle span::before{top:-6px;left:0}
.nav-toggle span::after{top:6px;left:0}

/* ===== 移动抽屉 ===== */
.drawer{
  position:fixed;
  inset:0 0 0 auto;
  width:84%;
  max-width:360px;
  background:var(--stage);
  color:var(--ink-light);
  transform:translateX(102%);
  transition:transform .24s ease-out;
  z-index:1080;
  display:flex;
  flex-direction:column;
  padding:22px 22px 32px;
  overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-close{
  width:40px;height:40px;border-radius:var(--r-sm);
  background:transparent;border:1px solid var(--line-dark);color:var(--ink-light);
  font-size:18px;line-height:1;
}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:24px}
.drawer-nav a{
  padding:12px 12px;
  color:var(--ink-light);
  border-radius:var(--r-sm);
  font-size:15px;
  border-left:3px solid transparent;
}
.drawer-nav a:hover{background:rgba(255,255,255,.05)}
.drawer-nav a.is-active{border-left-color:var(--brand);color:var(--brand);font-weight:600}
.drawer-note{
  border-top:1px solid var(--line-dark);
  padding-top:18px;
  font-size:13px;
  color:var(--ink-light-2);
}
.drawer-note .info-domain{display:inline-block;margin-bottom:6px}
.drawer-cta{margin-top:22px}
.drawer-backdrop{
  position:fixed;
  inset:0;
  background:rgba(11,15,18,.55);
  opacity:0;
  pointer-events:none;
  transition:opacity .24s ease-out;
  z-index:1070;
}
.drawer-backdrop.is-open{opacity:1;pointer-events:auto}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:46px;
  padding:11px 22px;
  border-radius:var(--r-sm);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  text-align:center;
  transition:background .2s ease-out,color .2s ease-out,border-color .2s ease-out,transform .12s ease-out,box-shadow .2s ease-out;
}
.btn:active{transform:translateY(1px)}
.btn-primary{
  background:var(--brand);
  color:#062A21;
  border-color:var(--brand);
  box-shadow:0 8px 20px -12px rgba(0,211,167,.7);
}
.btn-primary:hover{background:var(--brand-dark);border-color:var(--brand-dark);color:#fff}
.btn-outline{
  background:transparent;
  color:var(--ink);
  border-color:var(--line);
}
.btn-outline:hover{border-color:var(--brand);color:var(--brand-dark);background:var(--brand-08)}
.btn-ghost-light{
  background:transparent;
  color:var(--ink-light);
  border-color:rgba(255,255,255,.24);
}
.btn-ghost-light:hover{border-color:var(--brand);color:var(--brand);background:rgba(0,211,167,.08)}
.btn-block{width:100%}
.btn-sm{min-height:38px;padding:7px 16px;font-size:14px}

/* ===== 徽章 / 标签 ===== */
.badge-tag{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:999px;
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.02em;
  background:var(--brand-08);
  color:var(--brand-dark);
  border:1px solid var(--brand-16);
}
.badge-tag.is-accent{background:var(--accent-16);color:#C64A15;border-color:rgba(255,107,44,.28)}
.badge-tag.is-dark{background:rgba(0,211,167,.12);color:var(--brand);border-color:rgba(0,211,167,.3)}

/* ===== 面包屑 ===== */
.breadcrumb-bar{
  background:#fff;
  border-bottom:1px solid var(--line);
  padding:14px 0;
}
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--ink-2);
  margin:0;
  padding:0;
  list-style:none;
}
.crumbs li{margin:0;display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"›";color:#B6BFC7}
.crumbs a{color:var(--ink-2)}
.crumbs a:hover{color:var(--brand-dark)}
.crumbs .current{color:var(--ink);font-weight:600}

/* ===== Hero 条 ===== */
.page-hero{
  position:relative;
  padding:76px 0 68px;
  background-image:
    linear-gradient(100deg,rgba(11,15,18,.93) 0%,rgba(11,15,18,.86) 46%,rgba(11,15,18,.62) 100%),
    url("/assets/images/backpic/back-2.webp");
  background-size:cover;
  background-position:center;
  color:var(--ink-light);
  overflow:hidden;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:22px 22px;
  pointer-events:none;
}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{color:var(--ink-light);margin-bottom:16px}
.hero-accent{color:var(--brand)}
.hero-underline{
  display:block;
  width:88px;
  height:4px;
  border-radius:2px;
  background:var(--brand);
  margin:0 0 22px;
}
.page-hero .hero-lead{
  color:var(--ink-light-2);
  font-size:18px;
  max-width:660px;
  margin-bottom:28px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.hero-meta{
  display:flex;
  flex-wrap:wrap;
  gap:10px 26px;
  padding-top:20px;
  border-top:1px solid var(--line-dark);
  font-size:13px;
  color:var(--ink-light-2);
}
.hero-meta strong{
  display:block;
  font-family:var(--mono);
  font-size:20px;
  color:var(--brand);
  font-weight:700;
  letter-spacing:.02em;
}

/* ===== 卡片 ===== */
.card-base{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh);
  padding:24px;
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  height:100%;
}
.card-base:hover{
  transform:translateY(-4px);
  box-shadow:var(--sh-hover);
  border-color:rgba(0,211,167,.35);
}
.res-card{padding:0;overflow:hidden;display:flex;flex-direction:column}
.res-card .res-cover{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--stage);
}
.res-card .res-cover img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .3s ease-out;
}
.res-card:hover .res-cover img{transform:scale(1.04)}
.res-card .res-cover .badge-tag{
  position:absolute;
  left:14px;
  top:14px;
  background:rgba(11,15,18,.78);
  color:var(--brand);
  border-color:rgba(0,211,167,.35);
  backdrop-filter:blur(2px);
}
.res-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
.res-body h3{
  font-size:19px;
  margin-bottom:10px;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.res-body p{
  color:var(--ink-2);
  font-size:15px;
  margin-bottom:16px;
}
.res-foot{
  margin-top:auto;
  padding-top:14px;
  border-top:1px dashed var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  font-size:13px;
  color:var(--ink-2);
  font-family:var(--mono);
  letter-spacing:.02em;
}
.link-arrow{
  font-family:var(--font);
  font-size:14px;
  font-weight:600;
  color:var(--brand-dark);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.link-arrow::after{content:"→";transition:transform .2s ease-out}
.link-arrow:hover::after{transform:translateX(4px)}

/* ===== 图文区块 ===== */
.feature-block{display:flex;flex-direction:column;gap:24px}
.feature-media{
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh);
  background:var(--stage);
}
.feature-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.feature-copy h3{font-size:22px;margin-bottom:12px}
.feature-copy p{color:var(--ink-2)}
.check-list{list-style:none;padding:0;margin:18px 0 0}
.check-list li{
  position:relative;
  padding-left:30px;
  margin-bottom:12px;
  color:var(--ink);
  font-size:15.5px;
}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:.55em;
  width:16px;
  height:16px;
  border-radius:4px;
  border:1px solid var(--brand);
  background:var(--brand-08);
}
.check-list li::after{
  content:"";
  position:absolute;
  left:5px;
  top:.9em;
  width:6px;
  height:3px;
  border-left:2px solid var(--brand-dark);
  border-bottom:2px solid var(--brand-dark);
  transform:rotate(-45deg);
}

/* ===== 步骤时间轴 ===== */
.steps{
  position:relative;
  display:grid;
  gap:20px;
  counter-reset:step;
}
.step-item{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px 24px 24px 78px;
  box-shadow:var(--sh);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.step-item:hover{transform:translateY(-3px);border-color:rgba(0,211,167,.35);box-shadow:var(--sh-hover)}
.step-item::before{
  counter-increment:step;
  content:"0" counter(step);
  position:absolute;
  left:24px;
  top:24px;
  font-family:var(--mono);
  font-size:22px;
  font-weight:700;
  color:var(--brand);
  letter-spacing:.02em;
}
.step-item h3{font-size:19px;margin-bottom:8px}
.step-item p{color:var(--ink-2);font-size:15px;margin:0}
.step-tag{
  display:inline-block;
  margin-top:12px;
  font-size:12.5px;
  font-family:var(--mono);
  color:var(--ink-2);
  background:var(--paper);
  border:1px dashed var(--line);
  border-radius:var(--r-sm);
  padding:3px 10px;
}

/* ===== 侧栏 ===== */
.sidebar{display:grid;gap:20px;align-content:start;position:sticky;top:96px}
.side-card{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--sh);
}
.side-card h3{font-size:18px;margin-bottom:14px}
.side-links{list-style:none;padding:0;margin:0;display:grid;gap:2px}
.side-links li{margin:0}
.side-links a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:11px 12px;
  border-radius:var(--r-sm);
  color:var(--ink);
  font-size:14.5px;
  border-left:3px solid transparent;
  transition:background .2s ease-out,border-color .2s ease-out,color .2s ease-out;
}
.side-links a::after{content:"›";color:#B6BFC7;font-size:16px}
.side-links a:hover{background:var(--brand-08);border-left-color:var(--brand);color:var(--brand-dark)}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag-cloud span{
  font-size:13px;
  padding:5px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  color:var(--ink-2);
  background:var(--paper);
  transition:border-color .2s ease-out,color .2s ease-out;
  cursor:default;
}
.tag-cloud span:hover{border-color:var(--brand);color:var(--brand-dark)}

/* ===== 表单 ===== */
.form-field{margin-bottom:16px}
.form-field label{
  display:block;
  font-size:14px;
  color:var(--ink-2);
  margin-bottom:7px;
  font-weight:500;
}
.form-control{
  width:100%;
  min-height:46px;
  padding:10px 14px;
  border:1px solid var(--line);
  border-radius:10px;
  background:#fff;
  font-size:15px;
  transition:border-color .2s ease-out,background .2s ease-out,box-shadow .2s ease-out;
}
.form-control:focus{
  outline:none;
  border:1.5px solid var(--brand);
  background:var(--brand-08);
  box-shadow:none;
}
textarea.form-control{min-height:110px;resize:vertical;line-height:1.7}
.form-hint{font-size:12.5px;color:var(--ink-2);margin-top:10px}
.form-error{
  display:none;
  font-size:12.5px;
  color:var(--accent);
  margin-top:6px;
}

/* ===== FAQ ===== */
.faq-list{border-top:1px solid var(--line)}
.faq-item{
  border-bottom:1px solid var(--line);
  padding:4px 0;
}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  align-items:flex-start;
  gap:16px;
  padding:20px 8px 20px 0;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  position:relative;
  transition:color .2s ease-out;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";
  margin-left:auto;
  font-family:var(--mono);
  font-size:20px;
  line-height:1;
  color:var(--brand-dark);
  transform:translateY(3px);
  transition:transform .2s ease-out;
}
.faq-item[open] summary{color:var(--brand-dark)}
.faq-item[open] summary::after{content:"−";transform:translateY(3px) rotate(180deg)}
.faq-item summary::before{
  content:"";
  position:absolute;
  left:-14px;
  top:18px;
  bottom:18px;
  width:3px;
  border-radius:2px;
  background:transparent;
  transition:background .2s ease-out;
}
.faq-item[open] summary::before{background:var(--brand)}
.faq-body{padding:0 40px 22px 0;color:var(--ink-2);font-size:15.5px}
.help-card{
  background:var(--stage);
  color:var(--ink-light);
  border-radius:var(--r-card);
  padding:26px;
  border:1px solid var(--line-dark);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.help-card h3{color:var(--ink-light);font-size:19px}
.help-card p{color:var(--ink-light-2);font-size:14.5px}

/* ===== CTA 带 ===== */
.cta-band{
  position:relative;
  background:var(--stage);
  color:var(--ink-light);
  padding:var(--sec) 0;
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:22px 22px;
}
.cta-band .container{position:relative;z-index:2}
.cta-band h2{color:var(--ink-light)}
.cta-band p{color:var(--ink-light-2);max-width:620px;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:26px}

/* ===== 页脚 ===== */
.site-footer{
  background:var(--stage);
  color:var(--ink-light-2);
  padding:72px 0 0;
  border-top:1px solid var(--line-dark);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:44px;
}
.site-footer h4{
  color:var(--ink-light);
  font-size:15px;
  letter-spacing:.04em;
  margin-bottom:16px;
  font-weight:600;
}
.site-footer .brand{color:var(--ink-light);margin-bottom:14px}
.site-footer .brand:hover{color:var(--brand)}
.site-footer .brand-sub{color:var(--ink-light-2)}
.footer-about{font-size:14px;line-height:1.8;margin-bottom:12px}
.footer-domain{
  font-family:var(--mono);
  font-size:13px;
  color:var(--brand);
  letter-spacing:.06em;
}
.footer-links{list-style:none;padding:0;margin:0;display:grid;gap:2px}
.footer-links li{margin:0}
.footer-links a{
  display:inline-block;
  padding:6px 0;
  color:var(--ink-light-2);
  font-size:14.5px;
  border-bottom:1px solid transparent;
}
.footer-links a:hover{color:var(--brand);border-bottom-color:rgba(0,211,167,.4)}
.footer-sub{
  display:flex;
  gap:10px;
  margin-top:12px;
}
.footer-sub .form-control{
  background:rgba(255,255,255,.04);
  border-color:var(--line-dark);
  color:var(--ink-light);
  min-height:44px;
}
.footer-sub .form-control::placeholder{color:#7C878F}
.footer-bottom{
  border-top:1px solid var(--line-dark);
  padding:22px 0 88px;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
}
.footer-bottom .fb-links{display:flex;flex-wrap:wrap;gap:18px}

/* ===== 悬浮 CTA ===== */
.float-cta{
  position:fixed;
  right:24px;
  bottom:24px;
  z-index:1050;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:13px 22px;
  border-radius:999px;
  background:var(--brand);
  color:#062A21;
  font-weight:700;
  font-size:15px;
  border:1px solid var(--brand);
  box-shadow:0 16px 36px -16px rgba(0,211,167,.6);
  opacity:0;
  transform:translateY(14px);
  pointer-events:none;
  transition:opacity .24s ease-out,transform .24s ease-out,background .2s ease-out;
}
.float-cta.is-visible{opacity:1;transform:translateY(0);pointer-events:auto}
.float-cta:hover{background:var(--brand-dark);color:#fff}
.float-bar{display:none}

/* ===== 响应式 ===== */
@media (max-width:1199.98px){
  .container{max-width:1040px}
  .sidebar{position:static}
}
@media (max-width:991.98px){
  :root{--sec:72px}
  .main-nav{display:none}
  .nav-toggle{display:block}
  .nav-cta{display:none}
  .nav-inner{min-height:64px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .page-hero{padding:60px 0 54px}
  .feature-block{gap:20px}
  .cta-band{padding:72px 0}
}
@media (max-width:767.98px){
  :root{--sec:56px}
  body{font-size:15px}
  .container{padding-left:18px;padding-right:18px}
  .info-bar{display:none}
  .hero-actions .btn{width:100%}
  .hero-meta{gap:16px}
  .res-body{padding:18px}
  .side-card{padding:20px}
  .faq-item summary{font-size:16px;padding:18px 0}
  .faq-body{padding:0 0 20px}
  .float-cta{display:none}
  .float-bar{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    position:fixed;
    left:0;
    right:0;
    bottom:0;
    z-index:1050;
    background:var(--stage);
    border-top:1px solid var(--line-dark);
    padding:10px 18px calc(10px + env(safe-area-inset-bottom));
  }
  .float-bar span{color:var(--ink-light-2);font-size:13px}
  .float-bar .btn{min-height:40px;padding:8px 18px;font-size:14px}
  .footer-bottom{padding-bottom:96px}
}
@media (max-width:575.98px){
  h1{font-size:28px}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .footer-sub{flex-direction:column}
  .footer-sub .btn{width:100%}
  .step-item{padding:22px 20px 22px 66px}
  .step-item::before{left:18px;font-size:20px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important}
}

/* roulang page: category3 */
:root{
  --brand:#00D3A7;
  --brand-dark:#00A37F;
  --brand-ink:#007A62;
  --brand-08:rgba(0,211,167,.08);
  --brand-16:rgba(0,211,167,.16);
  --accent:#FF6B2C;
  --cat:#7C5CFF;
  --cat-08:rgba(124,92,255,.08);
  --ink:#0B0F12;
  --dark:#0B0F12;
  --dark-2:#151A1F;
  --paper:#FFFFFF;
  --paper-2:#F6F7F9;
  --paper-3:#F1F3F5;
  --text:#14181C;
  --muted:#5A646E;
  --line:#E6E9ED;
  --line-dark:rgba(255,255,255,.08);
  --on-dark:#F2F5F7;
  --on-dark-muted:#A8B3BD;
  --r-sm:8px;
  --r-card:14px;
  --r-lg:20px;
  --shadow:0 1px 2px rgba(11,15,18,.06), 0 8px 24px -12px rgba(11,15,18,.12);
  --shadow-hover:0 16px 40px -16px rgba(0,211,167,.28);
  --sec:96px;
  --mono:"SFMono-Regular", ui-monospace, "Menlo", "Consolas", monospace;
}

*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
  background:var(--paper-2);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:var(--brand-ink);text-decoration:none;transition:color .18s ease-out;}
a:hover,a:focus{color:var(--brand-dark);}
button{font-family:inherit;}
h1,h2,h3,h4{margin:0 0 .6em;color:var(--text);line-height:1.3;}
h1{font-weight:800;font-size:clamp(30px,4.2vw,44px);}
h2{font-weight:700;font-size:clamp(24px,2.8vw,32px);}
h3{font-weight:600;font-size:20px;}
p{margin:0 0 1.15em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}

.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.container-wide{max-width:1300px;}

/* ---------- 顶部信息条 ---------- */
.topbar{
  background:var(--dark);
  color:var(--on-dark-muted);
  font-size:13px;
  letter-spacing:.02em;
  border-bottom:1px solid var(--line-dark);
}
.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:38px;
  gap:16px;
}
.topbar-left{display:flex;align-items:center;gap:12px;flex-wrap:wrap;}
.topbar-domain{
  font-family:var(--mono);
  letter-spacing:.06em;
  color:var(--on-dark);
}
.topbar-sep{width:1px;height:14px;background:var(--line-dark);display:inline-block;}
.topbar-link{color:var(--brand);font-weight:600;letter-spacing:.04em;}
.topbar-link:hover{color:#5FF0D0;}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:var(--paper);
  border-bottom:2px solid var(--ink);
  box-shadow:0 1px 0 rgba(11,15,18,.04), 0 6px 18px -14px rgba(11,15,18,.35);
}
.nav-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  min-height:70px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:800;
  font-size:19px;
  color:var(--ink);
  letter-spacing:.01em;
}
.logo:hover{color:var(--ink);}
.logo-mark{
  width:30px;height:30px;
  border:2px solid var(--ink);
  border-radius:var(--r-sm);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-family:var(--mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.02em;
  background:var(--brand);
  color:var(--ink);
  box-shadow:2px 2px 0 var(--ink);
}
.logo-text small{
  display:block;
  font-size:11px;
  font-weight:500;
  color:var(--muted);
  letter-spacing:.14em;
  text-transform:uppercase;
  line-height:1.2;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
  flex-wrap:wrap;
}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  border-radius:var(--r-sm);
  font-size:15px;
  color:var(--text);
  font-weight:500;
  transition:color .18s ease-out, background-color .18s ease-out;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:12px;right:12px;bottom:2px;
  height:2px;
  background:var(--brand);
  opacity:0;
  transform:scaleX(.4);
  transform-origin:left;
  transition:opacity .18s ease-out, transform .18s ease-out;
}
.main-nav a:hover{background:var(--brand-08);color:var(--brand-ink);}
.main-nav a:hover::after{opacity:.6;transform:scaleX(1);}
.main-nav a.is-active{color:var(--brand-ink);font-weight:700;}
.main-nav a.is-active::after{opacity:1;transform:scaleX(1);}
.nav-cta{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 20px;
  border-radius:var(--r-sm);
  border:2px solid var(--ink);
  background:var(--brand);
  color:var(--ink);
  font-weight:700;
  font-size:15px;
  letter-spacing:.02em;
  box-shadow:3px 3px 0 var(--ink);
  transition:transform .18s ease-out, box-shadow .18s ease-out, background-color .18s ease-out;
}
.nav-cta:hover{
  background:var(--brand-dark);
  color:var(--ink);
  transform:translate(1px,1px);
  box-shadow:2px 2px 0 var(--ink);
}
.nav-cta:active{transform:translate(3px,3px);box-shadow:0 0 0 var(--ink);}

.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:2px solid var(--ink);
  border-radius:var(--r-sm);
  background:var(--paper);
  box-shadow:2px 2px 0 var(--ink);
  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);}

/* ---------- 移动抽屉 ---------- */
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(11,15,18,.55);
  opacity:0;visibility:hidden;
  transition:opacity .2s ease-out, visibility .2s ease-out;
  z-index:1040;
}
.drawer{
  position:fixed;
  top:0;right:0;bottom:0;
  width:84%;
  max-width:360px;
  background:var(--paper);
  border-left:2px solid var(--ink);
  transform:translateX(100%);
  transition:transform .24s ease-out;
  z-index:1050;
  overflow-y:auto;
  padding:22px 20px 40px;
}
body.drawer-open .drawer{transform:translateX(0);}
body.drawer-open .drawer-mask{opacity:1;visibility:visible;}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding-bottom:16px;
  border-bottom:1px solid var(--line);
  margin-bottom:16px;
}
.drawer-close{
  border:2px solid var(--ink);
  background:var(--paper);
  border-radius:var(--r-sm);
  width:38px;height:38px;
  font-size:18px;
  line-height:1;
  cursor:pointer;
  box-shadow:2px 2px 0 var(--ink);
}
.drawer-nav{display:flex;flex-direction:column;gap:4px;margin-bottom:20px;}
.drawer-nav a{
  padding:13px 14px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  color:var(--text);
  font-weight:500;
}
.drawer-nav a.is-active{
  border-color:var(--cat);
  background:var(--cat-08);
  font-weight:700;
  color:#4B34B8;
}
.drawer-note{
  font-size:13px;
  color:var(--muted);
  border-top:1px dashed var(--line);
  padding-top:16px;
}
.drawer-note strong{color:var(--text);}
.drawer-cta{
  display:block;
  text-align:center;
  margin-top:16px;
  padding:13px;
  border:2px solid var(--ink);
  border-radius:var(--r-sm);
  background:var(--brand);
  color:var(--ink);
  font-weight:700;
  box-shadow:3px 3px 0 var(--ink);
}

/* ---------- 面包屑 ---------- */
.crumb-bar{
  background:var(--paper-2);
  border-bottom:1px solid var(--line);
}
.crumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  padding:12px 0;
  flex-wrap:wrap;
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand-ink);}
.crumb .sep{color:#B4BCC5;}
.crumb .current{color:var(--text);font-weight:600;}

/* ---------- 内页 Hero ---------- */
.inner-hero{
  position:relative;
  background-image:linear-gradient(90deg, rgba(11,15,18,.94) 0%, rgba(11,15,18,.82) 52%, rgba(11,15,18,.42) 100%), url("/assets/images/backpic/back-1.webp");
  background-size:cover;
  background-position:center;
  color:var(--on-dark);
  border-bottom:2px solid var(--ink);
}
.inner-hero::after{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px, transparent 1px);
  background-size:18px 18px;
  pointer-events:none;
}
.inner-hero-inner{
  position:relative;
  z-index:2;
  padding:78px 0 72px;
  max-width:760px;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--ink);
  background:var(--cat);
  border:2px solid var(--ink);
  border-radius:var(--r-sm);
  padding:5px 12px;
  margin-bottom:20px;
  box-shadow:2px 2px 0 rgba(11,15,18,.6);
}
.inner-hero h1{
  color:var(--on-dark);
  margin-bottom:18px;
  position:relative;
  padding-bottom:18px;
}
.inner-hero h1::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:78px;height:5px;
  background:var(--cat);
  border-radius:999px;
}
.hero-sub{
  font-size:19px;
  color:var(--on-dark-muted);
  max-width:620px;
  margin-bottom:26px;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border-radius:var(--r-sm);
  font-weight:700;
  font-size:15px;
  letter-spacing:.02em;
  padding:12px 22px;
  border:2px solid var(--ink);
  cursor:pointer;
  transition:transform .18s ease-out, box-shadow .18s ease-out, background-color .18s ease-out, color .18s ease-out;
}
.btn-primary{
  background:var(--brand);
  color:var(--ink);
  box-shadow:3px 3px 0 var(--ink);
}
.btn-primary:hover{background:var(--brand-dark);color:var(--ink);transform:translate(1px,1px);box-shadow:2px 2px 0 var(--ink);}
.btn-primary:active{transform:translate(3px,3px);box-shadow:0 0 0 var(--ink);}
.btn-ghost{
  background:transparent;
  color:var(--on-dark);
  border-color:rgba(255,255,255,.4);
  box-shadow:none;
}
.btn-ghost:hover{background:rgba(255,255,255,.08);color:#fff;border-color:var(--brand);}
.btn-soft{
  background:var(--paper);
  color:var(--ink);
  box-shadow:3px 3px 0 var(--ink);
}
.btn-soft:hover{background:var(--brand-08);color:var(--ink);transform:translate(1px,1px);box-shadow:2px 2px 0 var(--ink);}

/* ---------- 通用区块 ---------- */
.section{padding:var(--sec) 0;}
.section-tight{padding:64px 0;}
.section-alt{background:var(--paper-3);}
.section-dark{background:var(--dark);color:var(--on-dark);}
.section-dark h2,.section-dark h3{color:var(--on-dark);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--brand-ink);
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:26px;height:2px;
  background:var(--brand);
  display:inline-block;
}
.section-dark .eyebrow{color:var(--brand);}
.lede{font-size:17px;color:var(--muted);}
.section-dark .lede{color:var(--on-dark-muted);}

/* ---------- 数据条 ---------- */
.stat-strip{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
  margin-top:36px;
}
.stat-card{
  background:var(--paper);
  border:2px solid var(--ink);
  border-radius:var(--r-card);
  padding:24px 22px;
  box-shadow:4px 4px 0 rgba(11,15,18,.9);
}
.stat-num{
  font-family:var(--mono);
  font-size:clamp(32px,4vw,46px);
  font-weight:800;
  line-height:1;
  color:var(--ink);
  letter-spacing:-.01em;
}
.stat-num .unit{font-size:16px;font-weight:600;margin-left:4px;color:var(--cat);}
.stat-label{font-size:14px;color:var(--muted);margin-top:10px;}

/* ---------- 卡片 ---------- */
.card{
  background:var(--paper);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow);
  padding:26px;
  transition:transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(0,211,167,.3);}
.card h3{font-size:19px;margin-bottom:10px;}
.card p{font-size:15px;color:var(--muted);margin-bottom:0;}
.card-tag{
  display:inline-block;
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.12em;
  text-transform:uppercase;
  padding:4px 10px;
  border-radius:var(--r-sm);
  border:1px solid var(--line);
  background:var(--paper-2);
  color:var(--muted);
  margin-bottom:14px;
}
.card-tag.cat{border-color:var(--cat);background:var(--cat-08);color:#4B34B8;}
.card-tag.accent{border-color:rgba(255,107,44,.4);background:rgba(255,107,44,.1);color:#C44A15;}

/* ---------- 图文交错 ---------- */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
}
.split + .split{margin-top:72px;}
.split-media{
  border:2px solid var(--ink);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:6px 6px 0 rgba(11,15,18,.9);
  background:var(--paper);
}
.split-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.split.reverse .split-media{order:2;}
.split.reverse .split-body{order:1;}
.split-body h2{margin-bottom:14px;}
.split-body p{color:var(--muted);}
.frame-notes{
  margin-top:22px;
  border-top:1px dashed var(--line);
  padding-top:18px;
  display:grid;
  gap:12px;
}
.frame-notes li{
  display:flex;
  gap:12px;
  font-size:15px;
  color:var(--text);
}
.frame-notes li::before{
  content:"";
  flex:0 0 auto;
  width:8px;height:8px;
  margin-top:9px;
  border-radius:2px;
  background:var(--cat);
}

/* ---------- 时间轴 ---------- */
.timeline{
  position:relative;
  margin-top:44px;
  padding-left:38px;
}
.timeline::before{
  content:"";
  position:absolute;
  left:13px;top:6px;bottom:6px;
  width:2px;
  background:linear-gradient(180deg, var(--cat) 0%, rgba(124,92,255,.15) 100%);
}
.tl-item{
  position:relative;
  padding:0 0 34px 0;
}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";
  position:absolute;
  left:-38px;top:4px;
  width:28px;height:28px;
  border-radius:var(--r-sm);
  border:2px solid var(--ink);
  background:var(--paper);
  box-shadow:2px 2px 0 var(--ink);
}
.tl-num{
  position:absolute;
  left:-34px;top:8px;
  font-family:var(--mono);
  font-size:12px;
  font-weight:700;
  color:var(--ink);
}
.tl-item h3{font-size:19px;margin-bottom:8px;}
.tl-item p{color:var(--muted);font-size:15px;margin-bottom:0;}
.tl-item .tl-note{
  display:inline-block;
  margin-top:10px;
  font-size:13px;
  color:#4B34B8;
  background:var(--cat-08);
  border:1px solid rgba(124,92,255,.28);
  border-radius:var(--r-sm);
  padding:3px 10px;
}

/* ---------- 对照清单 ---------- */
.compare{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  margin-top:40px;
}
.compare-col{
  border-radius:var(--r-card);
  padding:26px;
  border:2px solid var(--ink);
  background:var(--paper);
  box-shadow:4px 4px 0 rgba(11,15,18,.9);
}
.compare-col.safe{background:#F2FFFB;border-color:var(--brand-dark);box-shadow:4px 4px 0 var(--brand-dark);}
.compare-col.risk{background:#FFF6F1;border-color:var(--accent);box-shadow:4px 4px 0 var(--accent);}
.compare-col h3{font-size:18px;margin-bottom:16px;display:flex;align-items:center;gap:10px;}
.dot{width:10px;height:10px;border-radius:50%;display:inline-block;}
.dot.safe{background:var(--brand-dark);}
.dot.risk{background:var(--accent);}
.compare-list li{
  display:flex;
  gap:12px;
  font-size:15px;
  padding:10px 0;
  border-bottom:1px dashed rgba(11,15,18,.1);
}
.compare-list li:last-child{border-bottom:0;}
.compare-col.safe .compare-list li::before{content:"✓";color:var(--brand-dark);font-weight:700;}
.compare-col.risk .compare-list li::before{content:"!";color:var(--accent);font-weight:700;}

/* ---------- FAQ ---------- */
.faq-wrap{
  display:grid;
  grid-template-columns:3fr 8fr;
  gap:48px;
  align-items:start;
}
.faq-side{
  background:var(--dark-2);
  border:1px solid var(--line-dark);
  border-radius:var(--r-card);
  padding:26px;
  color:var(--on-dark);
  position:sticky;
  top:100px;
}
.faq-side h3{color:var(--on-dark);font-size:18px;margin-bottom:10px;}
.faq-side p{color:var(--on-dark-muted);font-size:14px;margin-bottom:18px;}
.faq-side .btn{width:100%;}
.faq-side-stat{
  margin-top:22px;
  padding-top:18px;
  border-top:1px solid var(--line-dark);
  font-size:13px;
  color:var(--on-dark-muted);
  font-family:var(--mono);
  letter-spacing:.04em;
}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);position:relative;}
.faq-item::before{
  content:"";
  position:absolute;
  left:-16px;top:14px;bottom:14px;
  width:3px;
  background:var(--cat);
  opacity:0;
  transition:opacity .18s ease-out;
}
.faq-item[open]::before{opacity:1;}
.faq-item summary{
  list-style:none;
  cursor:pointer;
  padding:20px 44px 20px 4px;
  font-size:17px;
  font-weight:600;
  color:var(--text);
  position:relative;
  transition:color .18s ease-out;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";
  position:absolute;
  right:8px;top:50%;
  transform:translateY(-50%);
  font-family:var(--mono);
  font-size:22px;
  color:var(--muted);
  line-height:1;
  transition:color .18s ease-out;
}
.faq-item[open] summary{color:var(--brand-ink);}
.faq-item[open] summary::after{content:"−";color:var(--brand-ink);}
.faq-answer{padding:0 44px 24px 4px;color:var(--muted);font-size:15px;}
.faq-answer p{margin-bottom:.8em;}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;
  background:var(--dark);
  color:var(--on-dark);
  padding:88px 0;
  border-top:2px solid var(--ink);
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size:20px 20px;
}
.cta-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1.4fr 1fr;
  gap:48px;
  align-items:center;
}
.cta-band h2{color:var(--on-dark);margin-bottom:14px;}
.cta-band p{color:var(--on-dark-muted);margin-bottom:0;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;justify-content:flex-end;}
.cta-hint{
  font-size:13px;
  color:var(--on-dark-muted);
  margin-top:14px;
  font-family:var(--mono);
  letter-spacing:.04em;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--dark);
  color:var(--on-dark-muted);
  padding:72px 0 0;
  border-top:1px solid var(--line-dark);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-brand .logo{color:var(--on-dark);margin-bottom:16px;}
.footer-brand .logo:hover{color:var(--on-dark);}
.footer-brand .logo-mark{background:var(--brand);border-color:var(--on-dark);box-shadow:2px 2px 0 rgba(255,255,255,.35);}
.footer-brand p{font-size:14px;color:var(--on-dark-muted);max-width:340px;}
.footer-domain{
  display:inline-block;
  margin-top:14px;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.06em;
  color:var(--on-dark);
  border:1px solid var(--line-dark);
  border-radius:var(--r-sm);
  padding:4px 10px;
}
.footer-col h4{
  color:var(--on-dark);
  font-size:15px;
  font-weight:700;
  letter-spacing:.04em;
  margin-bottom:16px;
}
.footer-col li{margin-bottom:10px;font-size:14px;}
.footer-col a{color:var(--on-dark-muted);}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  border-top:1px solid var(--line-dark);
  padding:22px 0 84px;
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:13px;
}
.footer-bottom a{color:var(--on-dark-muted);}
.footer-bottom a:hover{color:var(--brand);}

/* ---------- 悬浮 CTA ---------- */
.float-cta{
  position:fixed;
  right:24px;bottom:24px;
  z-index:1020;
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 22px;
  border-radius:999px;
  border:2px solid var(--ink);
  background:var(--brand);
  color:var(--ink);
  font-weight:700;
  font-size:15px;
  box-shadow:4px 4px 0 var(--ink);
  opacity:0;
  visibility:hidden;
  transform:translateY(10px);
  transition:opacity .22s ease-out, transform .22s ease-out, visibility .22s ease-out, background-color .18s ease-out;
}
.float-cta.show{opacity:1;visibility:visible;transform:translateY(0);}
.float-cta:hover{background:var(--brand-dark);color:var(--ink);}
.mobile-cta{display:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  :root{--sec:80px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;}
}
@media (max-width:992px){
  :root{--sec:72px;}
  .main-nav{display:none;}
  .nav-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .inner-hero-inner{padding:60px 0 56px;}
  .split{grid-template-columns:1fr;gap:28px;}
  .split.reverse .split-media{order:0;}
  .split.reverse .split-body{order:0;}
  .faq-wrap{grid-template-columns:1fr;gap:32px;}
  .faq-side{position:static;}
  .cta-inner{grid-template-columns:1fr;gap:28px;}
  .cta-actions{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .stat-strip{grid-template-columns:1fr;gap:16px;}
  .compare{grid-template-columns:1fr;}
}
@media (max-width:768px){
  :root{--sec:56px;}
  .container{padding:0 16px;}
  body{font-size:15px;}
  .topbar{display:none;}
  .nav-inner{min-height:62px;}
  .logo{font-size:17px;}
  .inner-hero-inner{padding:48px 0 46px;}
  .hero-sub{font-size:16px;}
  .float-cta{display:none;}
  .mobile-cta{
    display:flex;
    position:fixed;
    left:0;right:0;bottom:0;
    z-index:1020;
    background:var(--dark);
    border-top:2px solid var(--ink);
    padding:10px 16px calc(10px + env(safe-area-inset-bottom,0px));
    align-items:center;
    gap:12px;
  }
  .mobile-cta span{
    flex:1;
    color:var(--on-dark-muted);
    font-size:13px;
    line-height:1.5;
  }
  .mobile-cta .btn{flex:0 0 auto;padding:10px 16px;font-size:14px;}
  .site-footer{padding-bottom:64px;}
}
@media (max-width:520px){
  h1{font-size:26px;}
  h2{font-size:22px;}
  .hero-actions .btn{width:100%;}
  .stat-card{padding:20px 18px;box-shadow:3px 3px 0 rgba(11,15,18,.9);}
  .footer-grid{grid-template-columns:1fr;}
  .timeline{padding-left:32px;}
  .tl-item::before{left:-32px;width:24px;height:24px;}
  .tl-num{left:-29px;top:5px;font-size:11px;}
  .card{padding:20px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category4 */
:root{
  --brand:#00D3A7;
  --brand-deep:#00A37F;
  --brand-08:rgba(0,211,167,.08);
  --brand-16:rgba(0,211,167,.16);
  --orange:#FF6B2C;
  --cat:#2E9BFF;
  --dark:#12151A;
  --dark-2:#1B1F26;
  --paper:#F4F1EA;
  --paper-2:#FBF9F4;
  --paper-3:#EFEBE1;
  --ink:#16191D;
  --ink-soft:#5B636C;
  --ink-mute:#8B8779;
  --line:#E2DED3;
  --line-dark:rgba(255,255,255,.10);
  --r-s:8px;
  --r-c:14px;
  --r-l:20px;
  --sh:0 1px 2px rgba(18,21,26,.06), 0 8px 24px -12px rgba(18,21,26,.14);
  --sh-hover:0 16px 40px -16px rgba(0,211,167,.28);
  --sh-hard:4px 4px 0 0 rgba(22,25,29,.9);
  --ease:cubic-bezier(.22,.61,.36,1);
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;padding:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;line-height:1.85;font-weight:400;
  color:var(--ink);background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease),background-color .18s var(--ease)}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--brand-deep);outline-offset:3px;border-radius:4px}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:800}
p{margin:0 0 1.1em}
ul,ol{margin:0;padding:0}
figure{margin:0}
::selection{background:var(--brand-16)}

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

/* ============ 顶部信息条 ============ */
.topbar{background:var(--dark);color:#A8B3BD;font-size:13px;line-height:1.5}
.topbar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:38px;padding-top:6px;padding-bottom:6px}
.topbar__left{display:flex;align-items:center;gap:14px;min-width:0}
.topbar__domain{font-family:var(--mono);letter-spacing:.06em;color:#F2F5F7;font-weight:600}
.topbar__sep{width:1px;height:14px;background:var(--line-dark);flex:0 0 1px}
.topbar__tip{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar__right{display:flex;align-items:center;gap:14px;flex:0 0 auto}
.topbar__link{color:var(--brand);font-weight:600}
.topbar__link:hover{color:#fff}

/* ============ 主导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;
  border-bottom:2px solid var(--ink);
  transition:box-shadow .2s var(--ease);
}
.site-header.is-stuck{box-shadow:0 10px 28px -18px rgba(18,21,26,.5)}
.site-header__inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:70px;padding-top:10px;padding-bottom:10px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:800;letter-spacing:-.01em;color:var(--ink);flex:0 0 auto}
.logo__mark{
  width:34px;height:34px;flex:0 0 34px;border:2px solid var(--ink);border-radius:10px;
  display:grid;place-items:center;background:var(--brand);color:var(--ink);
  font-size:14px;font-weight:800;line-height:1;
}
.logo__text{white-space:nowrap}
.logo:hover .logo__mark{background:var(--orange)}

.main-nav{display:flex;align-items:center;gap:4px;flex-wrap:nowrap}
.main-nav a{
  position:relative;padding:9px 13px;font-size:15px;color:#3B4249;border-radius:8px;white-space:nowrap;
}
.main-nav a:hover{background:var(--brand-16);color:var(--ink)}
.main-nav a.is-active{color:var(--ink);font-weight:700;background:var(--brand-16)}
.main-nav a.is-active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;background:var(--ink);border-radius:2px;
}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border:2px solid var(--ink);border-radius:10px;background:#fff;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s var(--ease),opacity .2s 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)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border:2px solid var(--ink);border-radius:999px;
  font-size:15px;font-weight:700;line-height:1;cursor:pointer;
  background:var(--ink);color:var(--paper-2);
  box-shadow:3px 3px 0 0 rgba(0,211,167,.55);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
  text-decoration:none;
}
.btn:hover{background:#000;color:#fff;transform:translateY(-2px);box-shadow:5px 5px 0 0 rgba(0,211,167,.75)}
.btn:active{transform:translateY(1px);box-shadow:1px 1px 0 0 rgba(0,211,167,.55)}
.btn--brand{background:var(--brand);color:#0B0F12;box-shadow:3px 3px 0 0 var(--ink)}
.btn--brand:hover{background:var(--brand-deep);color:#06110E;box-shadow:5px 5px 0 0 var(--ink)}
.btn--ghost{background:transparent;color:var(--ink);box-shadow:none}
.btn--ghost:hover{background:var(--brand-16);color:var(--ink);box-shadow:none}
.btn--light{background:transparent;color:#F2F5F7;border-color:rgba(255,255,255,.5);box-shadow:none}
.btn--light:hover{background:rgba(255,255,255,.1);color:#fff;box-shadow:none;border-color:#fff}
.btn--sm{height:40px;padding:0 18px;font-size:14px}
.btn--block{width:100%}

/* ============ 移动抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(18,21,26,.55);z-index:80;
  opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s var(--ease);
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:84%;max-width:360px;z-index:90;
  background:var(--paper-2);border-left:2px solid var(--ink);
  padding:20px 20px 32px;overflow-y:auto;
  transform:translateX(102%);transition:transform .26s var(--ease);
}
.drawer.is-open{transform:translateX(0)}
.drawer__head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:2px dashed rgba(22,25,29,.25)}
.drawer__close{width:38px;height:38px;border:2px solid var(--ink);border-radius:10px;background:#fff;font-size:18px;line-height:1;cursor:pointer}
.drawer__nav{display:grid;gap:8px;margin:18px 0 24px}
.drawer__nav a{padding:12px 14px;border:2px solid var(--line);border-radius:10px;background:#fff;font-size:16px;font-weight:600}
.drawer__nav a.is-active{border-color:var(--ink);background:var(--brand-16)}
.drawer__note{font-size:13px;color:var(--ink-soft);border-top:2px dashed rgba(22,25,29,.2);padding-top:16px}
.drawer__note strong{display:block;font-family:var(--mono);letter-spacing:.05em;color:var(--ink);margin-bottom:6px}

/* ============ 分类首屏 ============ */
.cat-hero{position:relative;overflow:hidden;background:var(--dark);display:flex;align-items:center;min-height:360px}
.cat-hero__bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.4}
.cat-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(18,21,26,.95) 0%,rgba(18,21,26,.8) 46%,rgba(18,21,26,.42) 100%);
}
.cat-hero__inner{position:relative;z-index:2;padding-top:70px;padding-bottom:78px;max-width:1240px}
.tag{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:999px;
  font-size:12.5px;font-weight:700;letter-spacing:.06em;
  border:1px solid rgba(255,255,255,.35);background:rgba(255,255,255,.08);color:#E8EEF2;
}
.tag--cat{border-color:rgba(46,155,255,.6);background:rgba(46,155,255,.18);color:#CFE6FF}
.cat-hero h1{
  color:#F2F5F7;font-size:clamp(28px,4.2vw,46px);line-height:1.24;font-weight:800;
  margin:18px 0 0;max-width:17em;
}
.cat-hero h1::after{content:"";display:block;width:98px;height:5px;border-radius:999px;background:var(--cat);margin-top:20px}
.cat-hero__sub{color:#C4CDD6;font-size:clamp(15px,1.6vw,18px);margin:20px 0 0;max-width:34em}
.cat-hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.cat-hero__meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.chip{
  font-size:12.5px;font-family:var(--mono);letter-spacing:.05em;color:#CBD3DB;
  border:1px dashed rgba(255,255,255,.28);border-radius:999px;padding:4px 12px;
}

/* ============ 面包屑 ============ */
.crumb{background:var(--paper-3);border-bottom:2px solid var(--ink)}
.crumb__inner{padding-top:12px;padding-bottom:12px;font-size:13px;color:var(--ink-soft);display:flex;flex-wrap:wrap;align-items:center;gap:2px}
.crumb a:hover{color:var(--brand-deep)}
.crumb span{margin:0 8px;color:var(--ink-mute)}
.crumb em{font-style:normal;color:var(--ink);font-weight:600}

/* ============ 板块基础 ============ */
.section{padding-top:96px;padding-bottom:96px}
.section--alt{background:var(--paper-2);border-top:2px solid var(--ink);border-bottom:2px solid var(--ink)}
.section--dark{background:var(--dark);color:#E7ECF0}
.section--dark .sec-lead{color:#A8B3BD}
.sec-head{max-width:52em}
.sec-kicker{
  display:inline-block;font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;
  font-weight:700;color:#0B0F12;background:var(--brand-16);border:2px solid var(--ink);
  border-radius:999px;padding:3px 13px;line-height:1.6;
}
.sec-head h2{font-size:clamp(24px,3vw,34px);margin:18px 0 12px}
.sec-head h2 em{font-style:normal;color:var(--brand-deep)}
.sec-lead{color:var(--ink-soft);font-size:16.5px;margin:0}

/* ============ 对比清单 ============ */
.cmp{display:grid;grid-template-columns:1fr 1fr;gap:26px;margin-top:48px}
.cmp__col{
  border:2px solid var(--ink);border-radius:var(--r-c);background:#fff;padding:28px;
  box-shadow:var(--sh-hard);transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.cmp__col:hover{transform:translateY(-4px)}
.cmp__col--get{background:var(--brand-08);box-shadow:6px 6px 0 0 var(--brand)}
.cmp__col--get:hover{box-shadow:8px 8px 0 0 var(--brand)}
.cmp__head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-bottom:16px;border-bottom:2px dashed rgba(22,25,29,.22)}
.cmp__head h3{font-size:20px}
.cmp__badge{font-family:var(--mono);font-size:11px;letter-spacing:.1em;padding:3px 10px;border-radius:999px;border:1px solid rgba(22,25,29,.3);color:var(--ink-soft)}
.cmp__col--get .cmp__badge{background:var(--brand);border-color:var(--ink);color:#0B0F12;font-weight:700}
.tick{list-style:none;padding:0;margin:20px 0 0;display:grid;gap:14px}
.tick li{display:flex;gap:12px;font-size:15.5px;line-height:1.72;color:#2C333A}
.tick li::before{
  content:"✕";flex:0 0 22px;height:22px;margin-top:4px;border-radius:999px;
  display:grid;place-items:center;font-size:11px;font-weight:800;
  background:rgba(255,107,44,.16);color:#B84510;border:1px solid rgba(255,107,44,.45);
}
.tick--yes li::before{content:"✓";background:var(--brand-16);color:#00775A;border-color:rgba(0,211,167,.6)}

/* ============ 图文大图区块 ============ */
.figure-split{display:grid;grid-template-columns:1.35fr .65fr;gap:48px;align-items:start;margin-top:48px}
.big-figure{
  border:2px solid var(--ink);border-radius:var(--r-l);overflow:hidden;background:#fff;
  box-shadow:8px 8px 0 0 rgba(22,25,29,.9);
}
.big-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.big-figure figcaption{
  padding:15px 22px;font-size:13px;color:var(--ink-soft);
  border-top:2px dashed rgba(22,25,29,.25);background:var(--paper-2);
}
.side-card{
  border:2px solid var(--ink);border-radius:var(--r-c);background:#fff;padding:26px;box-shadow:var(--sh-hard);
}
.side-card h3{font-size:19px;margin-bottom:6px}
.side-card p{font-size:14.5px;color:var(--ink-soft);margin-bottom:16px}
.plain-list{list-style:none;padding:0;display:grid;gap:0}
.plain-list li{
  display:flex;align-items:flex-start;gap:10px;padding:12px 0;font-size:14.8px;color:#2C333A;
  border-top:1px dashed rgba(22,25,29,.18);
}
.plain-list li:first-child{border-top:0}
.plain-list li::before{content:"›";color:var(--brand-deep);font-weight:800;line-height:1.6}

/* ============ 卡片网格 ============ */
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:48px}
.gcard{
  border:2px solid var(--ink);border-radius:var(--r-c);background:#fff;padding:26px;
  box-shadow:3px 3px 0 0 rgba(22,25,29,.85);
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background-color .2s var(--ease);
}
.gcard:hover{transform:translateY(-4px);box-shadow:7px 7px 0 0 var(--brand)}
.gcard__idx{
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:#0B0F12;
  background:var(--brand);border:1px solid var(--ink);border-radius:6px;
  display:inline-block;padding:2px 8px;margin-bottom:16px;font-weight:700;
}
.gcard h3{font-size:18.5px;margin-bottom:10px}
.gcard p{font-size:14.6px;color:var(--ink-soft);margin:0}

/* ============ 状态条 ============ */
.status-strip{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  border:2px solid var(--ink);border-radius:var(--r-c);overflow:hidden;background:#fff;margin-top:48px;
}
.status-strip__item{padding:26px 24px;border-left:2px dashed rgba(22,25,29,.2)}
.status-strip__item:first-child{border-left:0}
.status-strip__label{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--ink-soft);margin-bottom:10px}
.status-strip__value{font-size:22px;font-weight:800;line-height:1.35}
.status-strip__value span{color:var(--brand-deep)}
.status-strip__desc{font-size:14px;color:var(--ink-soft);margin:8px 0 0}

/* ============ FAQ ============ */
.faq-grid{display:grid;grid-template-columns:1fr 1.75fr;gap:48px;align-items:start}
.faq-side{
  border:2px solid var(--ink);border-radius:var(--r-c);background:#fff;padding:26px;
  box-shadow:var(--sh-hard);position:sticky;top:100px;
}
.faq-side h3{font-size:19px;margin-bottom:10px}
.faq-side p{font-size:14.5px;color:var(--ink-soft)}
.faq{display:grid}
.faq details{border-bottom:2px dashed rgba(22,25,29,.2)}
.faq details:first-child{border-top:2px dashed rgba(22,25,29,.2)}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 4px;font-size:17px;font-weight:600;color:var(--ink);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";flex:0 0 auto;font-size:22px;font-weight:700;color:var(--brand-deep);line-height:1}
.faq details[open] summary::after{content:"−"}
.faq details[open] summary{color:var(--brand-deep)}
.faq details p{
  margin:0 0 20px;padding:2px 0 2px 18px;border-left:3px solid var(--brand);
  color:var(--ink-soft);font-size:15.5px;
}

/* ============ 尾部 CTA ============ */
.cta-band{
  position:relative;overflow:hidden;background:var(--dark);color:#F2F5F7;
  border-top:2px solid var(--ink);border-bottom:2px solid var(--ink);
  padding-top:82px;padding-bottom:82px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.05;
  background-image:radial-gradient(rgba(255,255,255,.9) 1px,transparent 1px);
  background-size:22px 22px;
}
.cta-band__inner{position:relative;z-index:2;display:grid;grid-template-columns:1.4fr 1fr;gap:48px;align-items:center}
.cta-band h2{font-size:clamp(24px,3vw,34px);margin-bottom:14px}
.cta-band p{color:#A8B3BD;margin:0;max-width:34em}
.cta-band__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}

/* ============ 页脚 ============ */
.site-footer{background:var(--dark);color:#A8B3BD;padding:64px 0 24px;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand .logo{color:#F2F5F7;margin-bottom:16px}
.footer-brand .logo__mark{border-color:rgba(255,255,255,.55)}
.footer-brand p{color:#8E99A4;font-size:14px;margin:0 0 14px;max-width:30em}
.footer-domain{font-family:var(--mono);font-size:13px;letter-spacing:.06em;color:var(--brand)}
.footer-col h4{font-size:15px;color:#F2F5F7;margin-bottom:16px;font-weight:700}
.footer-col ul{list-style:none;padding:0;display:grid;gap:10px}
.footer-col a{color:#A8B3BD;font-size:14.5px}
.footer-col a:hover{color:var(--brand)}
.footer-note{display:inline-flex;align-items:center;gap:8px;margin-top:6px;font-size:13px;color:#8E99A4;border:1px dashed rgba(255,255,255,.24);border-radius:999px;padding:4px 14px}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  font-size:13px;color:#8E99A4;
}
.footer-bottom a:hover{color:var(--brand)}

/* ============ 悬浮 CTA ============ */
.float-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity .24s var(--ease),transform .24s var(--ease),visibility .24s var(--ease);
}
.float-cta.is-show{opacity:1;visibility:visible;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1200px){
  .card-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:991px){
  .main-nav{display:none}
  .nav-toggle{display:inline-flex}
  .header-actions .btn{display:none}
  .section{padding-top:72px;padding-bottom:72px}
  .figure-split{grid-template-columns:1fr;gap:32px}
  .faq-grid{grid-template-columns:1fr;gap:32px}
  .faq-side{position:static}
  .cta-band__inner{grid-template-columns:1fr;gap:28px}
  .cta-band__actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cmp{grid-template-columns:1fr}
  .cmp__col--get{box-shadow:5px 5px 0 0 var(--brand)}
}
@media (max-width:767px){
  body{font-size:15px;padding-bottom:74px}
  .topbar{display:none}
  .container{padding-left:18px;padding-right:18px}
  .site-header__inner{min-height:62px;gap:12px}
  .logo{font-size:17px}
  .logo__mark{width:30px;height:30px;flex-basis:30px;font-size:13px}
  .section{padding-top:48px;padding-bottom:48px}
  .cat-hero{min-height:300px}
  .cat-hero__inner{padding-top:48px;padding-bottom:52px}
  .cat-hero__actions .btn{width:100%}
  .card-grid{grid-template-columns:1fr}
  .status-strip{grid-template-columns:1fr}
  .status-strip__item{border-left:0;border-top:2px dashed rgba(22,25,29,.2)}
  .status-strip__item:first-child{border-top:0}
  .gcard{padding:22px}
  .cmp__col{padding:22px}
  .btn{height:48px}
  .cta-band{padding-top:56px;padding-bottom:56px}
  .cta-band__actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .float-cta{right:12px;left:12px;bottom:12px}
  .float-cta .btn{width:100%}
}
@media (max-width:520px){
  .cat-hero h1{font-size:26px}
  .sec-head h2{font-size:23px}
  .faq summary{font-size:15.5px;padding:16px 2px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}