/* roulang page: index */
:root{
  --c-primary:#1E3F8F;
  --c-primary-600:#2A54B4;
  --c-primary-800:#16306E;
  --c-accent:#0E9E9E;
  --c-warm:#D98A2B;
  --c-bg:#F5F7FB;
  --c-bg-alt:#EDF1F9;
  --c-card:#FFFFFF;
  --c-line:#E1E7F2;
  --c-line-soft:#EDF1F7;
  --t-main:#0F1B33;
  --t-2:#4B5768;
  --t-3:#8892A6;
  --r-card:16px;
  --r-btn:10px;
  --sd-card:0 1px 2px rgba(15,27,51,.04), 0 10px 28px -14px rgba(15,27,51,.12);
  --sd-hover:0 2px 6px rgba(15,27,51,.06), 0 22px 44px -20px rgba(30,63,143,.28);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--t-main);
  background:var(--c-bg);
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select{font:inherit;color:inherit;}
p{margin:0;}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-0.01em;line-height:1.3;}
ul{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--c-primary-600);outline-offset:2px;border-radius:6px;}

.wrap{max-width:1200px;margin:0 auto;padding:0 20px;}
@media (min-width:768px){ .wrap{padding:0 32px;} }

.sec{padding:56px 0;}
@media (min-width:768px){ .sec{padding:72px 0;} }
@media (min-width:1024px){ .sec{padding:96px 0;} }
.sec-alt{background:var(--c-bg-alt);}
.sec-head{max-width:760px;margin-bottom:32px;}
.sec-kicker{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.04em;
  color:var(--c-primary);background:#E7EDFA;border-radius:999px;padding:4px 12px;margin-bottom:14px;
}
.sec-title{font-size:24px;}
@media (min-width:768px){ .sec-title{font-size:30px;} }
.sec-sub{margin-top:12px;color:var(--t-2);font-size:15.5px;}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--c-line);
}
.nav-bar{display:flex;align-items:center;justify-content:space-between;height:68px;}
.logo{display:flex;align-items:center;gap:10px;}
.logo-mark{
  width:36px;height:36px;border-radius:10px;background:var(--c-primary);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;letter-spacing:0;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-main{font-size:15px;font-weight:700;color:var(--t-main);letter-spacing:-0.01em;}
.logo-sub{font-size:11.5px;color:var(--t-3);letter-spacing:.06em;}
.nav-links{display:none;align-items:center;gap:32px;}
@media (min-width:1024px){ .nav-links{display:flex;} }
.nav-link{
  position:relative;font-size:15px;font-weight:500;color:var(--t-2);
  padding:6px 0;transition:color .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:50%;bottom:-2px;width:0;height:2px;
  background:var(--c-primary);transform:translateX(-50%);transition:width .24s ease;
}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{width:18px;}
.nav-link.active{color:var(--c-primary);font-weight:600;}
.nav-link.active::after{width:18px;}
.nav-link.active::before{
  content:"";position:absolute;right:-11px;top:50%;width:4px;height:4px;border-radius:50%;
  background:var(--c-primary);transform:translateY(-50%);
}
.nav-cta{display:none;}
@media (min-width:1024px){ .nav-cta{display:inline-flex;} }
.burger{
  width:42px;height:42px;border:1px solid var(--c-line);background:#fff;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
}
@media (min-width:1024px){ .burger{display:none;} }
.burger span{display:block;width:20px;height:1.5px;background:var(--t-main);position:relative;}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:20px;height:1.5px;background:var(--t-main);
}
.burger span::before{top:-6px;}
.burger span::after{top:6px;}
.drawer{
  display:none;background:#fff;border-bottom:1px solid var(--c-line);
}
.drawer.open{display:block;}
.drawer a{
  display:block;padding:16px 20px;font-size:17px;font-weight:500;border-bottom:1px solid var(--c-line-soft);
}
.drawer a.active{color:var(--c-primary);}
.drawer .drawer-cta{margin:18px 20px 22px;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:all .22s ease;white-space:nowrap;
}
.btn-primary{background:var(--c-warm);color:#fff;box-shadow:0 6px 18px -10px rgba(217,138,43,.9);}
.btn-primary:hover{background:#C57A20;transform:translateY(-2px);box-shadow:0 14px 26px -14px rgba(217,138,43,.9);}
.btn-secondary{background:#fff;color:var(--c-primary);border-color:var(--c-primary);}
.btn-secondary:hover{background:var(--c-bg-alt);transform:translateY(-1px);}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;color:var(--c-primary);font-size:15px;font-weight:600;
}
.btn-text .arrow{transition:transform .22s ease;}
.btn-text:hover .arrow{transform:translateX(4px);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}

/* 徽章 */
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
  font-size:12.5px;font-weight:700;letter-spacing:.04em;
}
.badge-brand{background:#E7EDFA;color:var(--c-primary);}
.badge-accent{background:#E1F5F5;color:#0B7C7C;}
.badge-warm{background:#FBEDD8;color:#A9631A;}

/* 卡片 */
.card{
  background:var(--c-card);border:1px solid var(--c-line);border-radius:var(--r-card);
  box-shadow:var(--sd-card);transition:transform .25s ease,box-shadow .25s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sd-hover);}
.card-body{padding:24px;}
.card-media{position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:var(--r-card) var(--r-card) 0 0;background:#E3E9F6;}
.card-media img{width:100%;height:100%;object-fit:cover;}
.card-title{font-size:17px;font-weight:600;line-height:1.5;}
.card-title a:hover{color:var(--c-primary);}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.meta{font-size:13px;color:var(--t-3);}
.divider{height:1px;background:var(--c-line-soft);border:0;}

/* Hero */
.hero{position:relative;background:#fff;border-bottom:1px solid var(--c-line);overflow:hidden;}
.hero-inner{display:grid;grid-template-columns:1fr;gap:36px;padding:48px 0 56px;}
@media (min-width:1024px){
  .hero-inner{grid-template-columns:7fr 5fr;gap:56px;align-items:center;padding:72px 0 80px;}
}
.hero h1{font-size:28px;line-height:1.28;}
@media (min-width:768px){ .hero h1{font-size:36px;} }
@media (min-width:1024px){ .hero h1{font-size:40px;line-height:1.22;} }
.hero-sub{margin-top:18px;font-size:16px;color:var(--t-2);max-width:560px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px;align-items:center;}
.trust{
  display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin-top:36px;
  border-top:1px solid var(--c-line);padding-top:22px;
}
.trust-item{padding-right:14px;border-right:1px solid var(--c-line-soft);}
.trust-item:last-child{border-right:0;}
.trust-num{font-size:22px;font-weight:700;color:var(--c-primary);letter-spacing:-0.01em;}
.trust-label{font-size:13px;color:var(--t-3);margin-top:2px;}
.hero-visual{position:relative;}
.hero-visual img{
  border-radius:var(--r-card);box-shadow:var(--sd-card);width:100%;aspect-ratio:4/3;object-fit:cover;
  border:1px solid var(--c-line);
}
.hero-glass{
  position:absolute;left:-14px;bottom:-16px;background:#fff;border:1px solid var(--c-line);
  border-radius:14px;box-shadow:var(--sd-hover);padding:14px 18px;display:flex;gap:12px;align-items:center;
}
@media (max-width:767px){ .hero-glass{left:8px;bottom:-12px;padding:12px 14px;} }
.hero-glass .dot{
  width:32px;height:32px;border-radius:50%;background:#E1F5F5;color:#0B7C7C;
  display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;
}
.hero-glass strong{display:block;font-size:14px;}
.hero-glass span{font-size:12.5px;color:var(--t-3);}

/* 功能卡 */
.icon-box{
  width:44px;height:44px;border-radius:12px;background:#E7EDFA;color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;margin-bottom:16px;
}
.feature-card h3{font-size:18px;font-weight:600;margin-bottom:10px;}
.feature-card p{font-size:14.5px;color:var(--t-2);line-height:1.8;}

/* 列表条目 */
.entry{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:16px 18px;border-radius:12px;transition:background .2s ease;
}
.entry + .entry{border-top:1px solid var(--c-line-soft);border-radius:0;}
.entry:hover{background:#F5F7FB;}
.entry:hover .entry-title{color:var(--c-primary);}
.entry-title{font-size:15.5px;font-weight:600;transition:color .2s ease;}

/* 对比表 */
.cmp-wrap{overflow:visible;}
.cmp-table{width:100%;border-collapse:separate;border-spacing:0;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sd-card);}
.cmp-table th,.cmp-table td{padding:16px 18px;text-align:left;font-size:15px;border-bottom:1px solid var(--c-line-soft);}
.cmp-table thead th{background:#F7F9FE;font-size:14px;font-weight:700;color:var(--t-2);}
.cmp-table tbody tr:nth-child(even){background:#FAFBFE;}
.cmp-table tbody tr:last-child td{border-bottom:0;}
.cmp-table td:first-child,.cmp-table th:first-child{width:220px;font-weight:600;color:var(--t-main);}
.col-rec{position:relative;box-shadow:inset 1px 0 0 var(--c-primary), inset -1px 0 0 var(--c-primary);}
.cmp-table thead th.col-rec{background:#EEF3FD;color:var(--c-primary);}
.mark-yes{display:inline-flex;width:22px;height:22px;border-radius:50%;background:#E1F5F5;color:#0B7C7C;align-items:center;justify-content:center;font-size:13px;font-weight:700;}
.mark-no{display:inline-block;width:16px;height:2px;background:#D6DCE8;border-radius:2px;vertical-align:middle;}
.cmp-cards{display:grid;gap:16px;}
.cmp-card{background:#fff;border:1px solid var(--c-line);border-radius:14px;padding:18px;box-shadow:var(--sd-card);}
.cmp-card h4{font-size:15.5px;margin-bottom:12px;font-weight:600;}
.cmp-row{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;padding:8px 0;border-top:1px solid var(--c-line-soft);}
.cmp-row span{font-size:13.5px;color:var(--t-2);}
.cmp-row .k{font-size:12.5px;color:var(--t-3);display:block;}

/* 等级卡 */
.tier{display:flex;flex-direction:column;height:100%;padding:26px 24px;}
.tier.featured{border:1px solid var(--c-primary);box-shadow:var(--sd-hover);position:relative;}
.tier.featured::after{
  content:"推荐";position:absolute;top:16px;right:16px;background:#FBEDD8;color:#A9631A;
  font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;
}
.tier-name{font-size:20px;font-weight:600;margin-top:14px;}
.tier-price{font-size:15px;color:var(--t-2);margin-top:6px;}
.tier-price b{font-size:26px;color:var(--c-primary);letter-spacing:-0.01em;}
.tier-list{margin:20px 0 24px;display:grid;gap:10px;}
.tier-list li{display:flex;gap:10px;font-size:14.5px;color:var(--t-2);}
.tick{
  flex:0 0 auto;width:18px;height:18px;border-radius:50%;background:#E1F5F5;color:#0B7C7C;
  font-size:11px;display:flex;align-items:center;justify-content:center;margin-top:4px;font-weight:700;
}
.tier-foot{margin-top:auto;}

/* 专属内容 */
.lock-tag{
  position:absolute;right:14px;bottom:14px;width:34px;height:34px;border-radius:10px;
  background:rgba(15,27,51,.72);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;
}

/* FAQ */
.faq-list{max-width:860px;margin:0 auto;display:grid;gap:14px;}
.faq-item{
  background:#fff;border:1px solid var(--c-line);border-radius:14px;box-shadow:var(--sd-card);overflow:hidden;
  transition:background .2s ease;
}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;font-size:17px;font-weight:600;
  display:flex;justify-content:space-between;gap:16px;align-items:flex-start;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .plus{color:var(--c-primary);font-size:18px;line-height:1;transition:transform .25s ease;}
.faq-item[open]{background:#F6F8FC;border-left:3px solid var(--c-primary);}
.faq-item[open] summary .plus{transform:rotate(45deg);}
.faq-answer{padding:0 22px 20px;font-size:15px;color:var(--t-2);line-height:1.8;}

/* CTA */
.cta-band{
  background:var(--c-primary);color:#fff;border-radius:20px;padding:36px 28px;position:relative;overflow:hidden;
}
@media (min-width:1024px){ .cta-band{padding:52px 48px;} }
.cta-band::before{
  content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;
  background:rgba(255,255,255,.07);
}
.cta-band::after{
  content:"";position:absolute;right:60px;bottom:-120px;width:220px;height:220px;border-radius:50%;
  background:rgba(255,255,255,.05);
}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr;gap:28px;}
@media (min-width:1024px){ .cta-grid{grid-template-columns:1fr 1fr;gap:48px;align-items:center;} }
.cta-band h2{font-size:23px;}
@media (min-width:768px){ .cta-band h2{font-size:28px;} }
.cta-band p{margin-top:12px;color:rgba(255,255,255,.82);font-size:15px;}
.cta-form{display:grid;gap:12px;}
.cta-form input,.cta-form select{
  height:48px;border-radius:var(--r-btn);border:1px solid rgba(255,255,255,.35);
  background:#fff;padding:0 14px;font-size:15px;color:var(--t-main);width:100%;
}
.cta-form input:focus,.cta-form select:focus{outline:2px solid var(--c-accent);outline-offset:1px;}
.cta-hint{font-size:12.5px;color:rgba(255,255,255,.7);}

/* 最新信息空态 */
.empty-state{
  background:#fff;border:1px dashed var(--c-line);border-radius:var(--r-card);
  padding:48px 24px;text-align:center;color:var(--t-3);
}
.empty-state .line-icon{
  width:46px;height:46px;margin:0 auto 14px;border-radius:50%;border:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:center;color:var(--t-3);font-size:18px;
}
.empty-state p{font-size:14px;margin-bottom:10px;}

/* 新闻卡 */
.news-card{display:flex;flex-direction:column;height:100%;}
.news-card .card-body{display:flex;flex-direction:column;flex:1;gap:10px;}
.news-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--t-3);}

/* 页脚 */
.site-footer{background:var(--c-bg-alt);border-top:1px solid var(--c-line);margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1fr;gap:32px;padding:48px 0 28px;}
@media (min-width:768px){ .footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;} }
.footer-title{font-size:13px;font-weight:700;color:var(--t-main);letter-spacing:.04em;margin-bottom:14px;}
.footer-links a{display:block;font-size:14px;color:var(--t-2);padding:5px 0;}
.footer-links a:hover{color:var(--c-primary);text-decoration:underline;}
.footer-note{font-size:13.5px;color:var(--t-2);margin-top:12px;line-height:1.8;}
.footer-bottom{
  border-top:1px solid var(--c-line);padding:18px 0;display:flex;flex-wrap:wrap;gap:10px;
  justify-content:space-between;font-size:13px;color:var(--t-3);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}

/* roulang page: article */
*,*::before,*::after{box-sizing:border-box}
  :root{
    --c-primary:#1E3F8F;
    --c-primary-600:#2A54B4;
    --c-primary-800:#16306E;
    --c-accent:#0E9E9E;
    --c-warm:#D98A2B;
    --c-bg:#F5F7FB;
    --c-bg-alt:#EDF1F9;
    --c-card:#FFFFFF;
    --c-line:#E1E7F2;
    --c-line-soft:#EDF1F7;
    --c-text:#0F1B33;
    --c-text-2:#4B5768;
    --c-text-3:#8892A6;
    --r-card:16px;
    --r-btn:10px;
    --r-img:12px;
    --sh-card:0 1px 2px rgba(15,27,51,.04), 0 10px 28px -14px rgba(15,27,51,.12);
    --sh-hover:0 2px 6px rgba(15,27,51,.06), 0 22px 44px -20px rgba(30,63,143,.28);
  }
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,sans-serif;
    background:var(--c-bg);
    color:var(--c-text);
    font-size:16px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-style:none}
  a{color:inherit;text-decoration:none}
  button{font:inherit;cursor:pointer;border:none;background:none}
  h1,h2,h3,h4,p{margin:0}
  ul,ol{margin:0;padding:0;list-style:none}
  .wrap{max-width:1200px;margin:0 auto;padding:0 20px}
  a:focus-visible,button:focus-visible,input:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(42,84,180,.28);border-radius:6px}

  /* ---------- 导航 ---------- */
  .site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--c-line)}
  .header-inner{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
  .logo{display:flex;align-items:center;gap:10px;flex:0 0 auto}
  .logo-mark{
    width:36px;height:36px;border-radius:10px;background:var(--c-primary);color:#fff;
    display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px;letter-spacing:0;
  }
  .logo-text{display:flex;flex-direction:column;line-height:1.15}
  .logo-main{font-size:16px;font-weight:700;color:var(--c-text);letter-spacing:-.01em}
  .logo-sub{font-size:11.5px;color:var(--c-text-3);letter-spacing:.16em;font-weight:600}
  .nav-links{display:flex;align-items:center;gap:32px}
  .nav-link{
    position:relative;font-size:15px;font-weight:500;color:var(--c-text-2);
    padding:22px 0;transition:color .18s ease;display:inline-flex;align-items:center;gap:6px;
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;bottom:14px;width:0;height:2px;background:var(--c-primary);
    transform:translateX(-50%);transition:width .2s ease;border-radius:2px;
  }
  .nav-link:hover{color:var(--c-primary)}
  .nav-link:hover::after{width:18px}
  .nav-link.active{color:var(--c-primary);font-weight:600}
  .nav-link.active::after{width:18px}
  .nav-link.active::before{
    content:"";position:absolute;right:-10px;top:50%;width:4px;height:4px;border-radius:50%;
    background:var(--c-primary);transform:translateY(-50%);
  }
  .header-actions{display:flex;align-items:center;gap:12px}
  .menu-toggle{
    display:none;width:42px;height:42px;border:1px solid var(--c-line);border-radius:10px;
    align-items:center;justify-content:center;color:var(--c-text);
  }
  .menu-toggle svg{width:24px;height:24px;stroke:currentColor;stroke-width:1.5;fill:none}
  .mobile-drawer{
    display:none;border-top:1px solid var(--c-line-soft);background:#fff;padding:8px 20px 94px;
  }
  .mobile-drawer.open{display:block}
  .mobile-drawer a{
    display:block;padding:18px 2px;font-size:18px;font-weight:500;color:var(--c-text);
    border-bottom:1px solid var(--c-line-soft);
  }
  .mobile-drawer a:hover{color:var(--c-primary)}
  .drawer-cta{
    position:fixed;left:0;right:0;bottom:0;padding:14px 20px;background:#fff;
    border-top:1px solid var(--c-line);display:none;
  }
  .mobile-drawer.open .drawer-cta{display:block}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:44px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;
    transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,color .18s ease,border-color .18s ease;
    white-space:nowrap;
  }
  .btn-primary{background:var(--c-warm);color:#fff;box-shadow:0 8px 20px -12px rgba(217,138,43,.9)}
  .btn-primary:hover{background:#C57A20;transform:translateY(-2px);box-shadow:0 12px 26px -12px rgba(217,138,43,.95)}
  .btn-outline{background:#fff;color:var(--c-primary);border:1px solid var(--c-primary)}
  .btn-outline:hover{background:var(--c-bg-alt);transform:translateY(-1px)}
  .btn-light{background:#fff;color:var(--c-primary);font-weight:600}
  .btn-light:hover{background:#F1F4FB;transform:translateY(-2px)}
  .btn-ghost-light{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.6)}
  .btn-ghost-light:hover{background:rgba(255,255,255,.14)}
  .btn-sm{height:38px;padding:0 16px;font-size:14px}
  .btn-text{color:var(--c-primary);font-weight:600;display:inline-flex;align-items:center;gap:6px;font-size:15px}
  .btn-text .arrow{transition:transform .2s ease}
  .btn-text:hover .arrow{transform:translateX(4px)}

  /* ---------- 标签 / 徽章 ---------- */
  .chip{
    display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
    font-size:12.5px;font-weight:600;letter-spacing:.04em;
  }
  .chip-primary{background:#E8EDFA;color:var(--c-primary-800)}
  .chip-accent{background:#E1F4F4;color:#0A7C7C}
  .chip-warm{background:#FBEFDD;color:#A5651A}

  /* ---------- 面包屑 ---------- */
  .crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--c-text-3);padding-top:24px}
  .crumbs a{color:var(--c-text-2)}
  .crumbs a:hover{color:var(--c-primary)}
  .crumbs .sep{color:#C3CBD9}
  .crumbs .current{color:var(--c-text-3);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

  /* ---------- 文章头 ---------- */
  .article-head{padding:20px 0 0;background:#fff;border-bottom:1px solid var(--c-line)}
  .article-head-inner{max-width:860px;margin:0 auto;padding:16px 20px 40px}
  .meta-bar{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:18px}
  .meta-item{font-size:13.5px;color:var(--c-text-3)}
  .meta-div{width:1px;height:14px;background:var(--c-line)}
  .article-h1{
    font-size:40px;line-height:1.22;font-weight:700;letter-spacing:-.01em;color:var(--c-text);
    word-break:break-word;
  }
  .article-lead{font-size:15px;color:var(--c-text-3);margin-top:16px;line-height:1.7}

  /* ---------- 布局 ---------- */
  .article-layout{
    display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start;
    padding-top:48px;padding-bottom:96px;
  }
  .article-main{
    background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    box-shadow:var(--sh-card);padding:40px 44px;
  }
  .cover-slot{margin-bottom:32px;border-radius:var(--r-img);overflow:hidden;background:#E7ECF7}
  .cover-slot img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img)}

  /* ---------- 正文排版 ---------- */
  .article-body{font-size:16px;line-height:1.85;color:var(--c-text-2);max-width:760px}
  .article-body p{margin:0 0 1.1em}
  .article-body h2{
    font-size:24px;line-height:1.4;font-weight:700;color:var(--c-text);
    margin:40px 0 16px;padding-left:12px;border-left:4px solid var(--c-primary);letter-spacing:-.01em;
  }
  .article-body h3{font-size:20px;line-height:1.5;font-weight:600;color:var(--c-text);margin:28px 0 12px}
  .article-body h4{font-size:17px;font-weight:600;color:var(--c-text);margin:22px 0 10px}
  .article-body strong{color:var(--c-text);font-weight:600}
  .article-body a{color:var(--c-primary);border-bottom:1px solid rgba(30,63,143,.28)}
  .article-body a:hover{border-bottom-color:var(--c-primary)}
  .article-body ul{margin:0 0 1.1em}
  .article-body ul li{position:relative;padding-left:18px;margin-bottom:8px}
  .article-body ul li::before{
    content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:50%;background:var(--c-accent);
  }
  .article-body ol{list-style:decimal;padding-left:1.3em;margin:0 0 1.1em}
  .article-body ol li{margin-bottom:8px}
  .article-body blockquote{
    margin:24px 0;padding:16px 18px;background:#F6F8FC;border-left:3px solid var(--c-primary);
    border-radius:0 10px 10px 0;color:var(--c-text-2);
  }
  .article-body img{border-radius:var(--r-img);margin:24px auto;height:auto}
  .article-body figure{margin:24px 0}
  .article-body figcaption{font-size:13px;text-align:center;color:var(--c-text-3);margin-top:8px}
  .article-body .table-scroll{overflow-x:auto;margin:24px 0;-webkit-overflow-scrolling:touch}
  .article-body table{width:100%;border-collapse:collapse;min-width:520px}
  .article-body th{background:#EEF2FB;color:var(--c-primary-800);font-weight:600;text-align:left}
  .article-body th,.article-body td{border:1px solid var(--c-line);padding:10px 14px;font-size:15px}
  .article-body hr{border:none;border-top:1px solid var(--c-line);margin:32px 0}

  /* ---------- 侧栏 ---------- */
  .article-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:88px}
  .side-card{
    background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    box-shadow:var(--sh-card);padding:24px;
  }
  .side-card.is-accent{border:1px solid var(--c-primary);box-shadow:var(--sh-hover)}
  .side-title{font-size:15px;font-weight:700;color:var(--c-text);margin-bottom:14px;letter-spacing:-.01em}
  .side-list{display:flex;flex-direction:column}
  .side-list a{
    display:flex;align-items:center;justify-content:space-between;gap:10px;
    padding:11px 0;font-size:14.5px;color:var(--c-text-2);border-bottom:1px solid var(--c-line-soft);
    transition:color .18s ease,padding-left .18s ease;
  }
  .side-list a:last-child{border-bottom:none}
  .side-list a:hover{color:var(--c-primary);padding-left:4px}
  .side-list .dot{width:5px;height:5px;border-radius:50%;background:var(--c-accent);flex:0 0 auto}
  .side-note{font-size:13.5px;color:var(--c-text-3);line-height:1.75;margin-bottom:16px}
  .side-stats{display:flex;gap:18px;margin:18px 0 20px}
  .side-stat b{display:block;font-size:20px;font-weight:700;color:var(--c-primary);line-height:1.2}
  .side-stat span{font-size:12.5px;color:var(--c-text-3)}

  /* ---------- 空态 ---------- */
  .empty-state{text-align:center;padding:56px 20px}
  .empty-icon{
    width:56px;height:56px;margin:0 auto 18px;border-radius:50%;border:1.5px solid var(--c-line);
    display:flex;align-items:center;justify-content:center;color:var(--c-text-3);
  }
  .empty-icon svg{width:24px;height:24px;stroke:currentColor;stroke-width:1.5;fill:none}
  .empty-state h2{font-size:20px;font-weight:600;color:var(--c-text);margin-bottom:10px}
  .empty-state p{font-size:14.5px;color:var(--c-text-3);margin-bottom:20px}

  /* ---------- 返回入口 ---------- */
  .back-row{margin-top:36px;padding-top:28px;border-top:1px solid var(--c-line-soft);text-align:center}

  /* ---------- CTA ---------- */
  .cta-band{
    background:var(--c-primary);color:#fff;position:relative;overflow:hidden;
  }
  .cta-band::after{
    content:"";position:absolute;right:-80px;top:-80px;width:320px;height:320px;border-radius:50%;
    background:rgba(255,255,255,.06);
  }
  .cta-inner{
    position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
    gap:28px;padding-top:64px;padding-bottom:64px;
  }
  .cta-band h2{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.01em;margin-bottom:12px}
  .cta-band p{font-size:15px;color:rgba(255,255,255,.82);max-width:56ch}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--c-bg-alt);border-top:1px solid var(--c-line)}
  .footer-grid{
    display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:40px;
    padding:64px 0 40px;
  }
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
  .footer-note{font-size:13.5px;color:var(--c-text-2);line-height:1.8;max-width:34ch}
  .footer-links{display:flex;flex-direction:column;gap:10px}
  .footer-title{font-size:14px;font-weight:700;color:var(--c-text);margin-bottom:4px;letter-spacing:.02em}
  .footer-links a{font-size:14px;color:var(--c-text-2);width:fit-content;border-bottom:1px solid transparent;transition:color .18s ease,border-color .18s ease}
  .footer-links a:hover{color:var(--c-primary);border-bottom-color:var(--c-primary)}
  .footer-bottom{
    border-top:1px solid var(--c-line);padding:20px 0 32px;display:flex;flex-wrap:wrap;gap:10px;
    justify-content:space-between;font-size:13px;color:var(--c-text-3);
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1023px){
    .nav-links{display:none}
    .menu-toggle{display:flex}
    .header-actions .btn-outline{display:none}
    .article-layout{grid-template-columns:minmax(0,1fr);gap:28px;padding-top:32px;padding-bottom:72px}
    .article-side{position:static;flex-direction:row;flex-wrap:wrap}
    .side-card{flex:1 1 300px}
    .article-h1{font-size:32px}
    .article-head-inner{padding-bottom:32px}
    .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:48px 0 32px}
  }
  @media (max-width:768px){
    .wrap{padding:0 16px}
    .article-main{padding:24px 20px}
    .article-h1{font-size:28px}
    .article-body h2{font-size:21px;margin-top:32px}
    .article-body h3{font-size:18px}
    .article-head-inner{padding:8px 16px 24px}
    .cta-band h2{font-size:24px}
    .cta-inner{padding-top:48px;padding-bottom:48px}
    .cta-actions{width:100%}
    .cta-actions .btn{flex:1 1 auto}
    .footer-grid{grid-template-columns:1fr;gap:22px}
  }
  @media (max-width:520px){
    .logo-main{font-size:15px}
    .side-stats{flex-wrap:wrap;gap:14px}
    .btn{width:100%}
    .btn-text{width:auto}
    .header-actions .btn{width:auto}
  }

/* roulang page: category1 */
:root{
  --c-primary:#1E3F8F;
  --c-primary-600:#2A54B4;
  --c-primary-800:#16306E;
  --c-accent:#0E9E9E;
  --c-warm:#D98A2B;
  --c-bg:#F5F7FB;
  --c-bg-alt:#EDF1F9;
  --c-card:#FFFFFF;
  --c-line:#E1E7F2;
  --c-line-soft:#EDF1F7;
  --c-text:#0F1B33;
  --c-text-2:#4B5768;
  --c-text-3:#8892A6;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --sh-card:0 1px 2px rgba(15,27,51,.04),0 10px 28px -14px rgba(15,27,51,.12);
  --sh-hover:0 2px 6px rgba(15,27,51,.06),0 22px 44px -20px rgba(30,63,143,.28);
  --font:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--c-bg);color:var(--c-text);
  font-family:var(--font);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s ease}
h1,h2,h3,h4,p,figure{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;border-radius:8px}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.wrap{padding:0 32px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--c-line)}
.header-inner{height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{width:34px;height:34px;border-radius:10px;background:var(--c-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;line-height:1}
.logo-text{display:flex;flex-direction:column;line-height:1.16}
.logo-main{font-size:15px;font-weight:700;letter-spacing:-.01em;color:var(--c-text)}
.logo-sub{font-size:11.5px;letter-spacing:.1em;color:var(--c-text-3)}
.nav-links{display:flex;align-items:center;gap:32px}
.nav-link{position:relative;font-size:15px;font-weight:500;color:var(--c-text-2);padding:6px 0}
.nav-link::after{content:"";position:absolute;left:50%;bottom:-3px;width:0;height:2px;background:var(--c-primary);transform:translateX(-50%);transition:width .22s ease}
.nav-link:hover{color:var(--c-primary)}
.nav-link:hover::after{width:18px}
.nav-link.active{color:var(--c-primary)}
.nav-link.active::after{width:18px}
.nav-link.active::before{content:"";position:absolute;right:-11px;top:50%;width:4px;height:4px;border-radius:50%;background:var(--c-primary);transform:translateY(-50%)}
.header-cta{flex:0 0 auto}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;padding:8px 9px}
.nav-toggle span{display:block;width:22px;height:1.5px;background:var(--c-text);border-radius:2px;margin:4px auto;transition:transform .25s ease,opacity .2s ease}
.nav-toggle.open span:nth-child(1){transform:translateY(5.5px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-5.5px) rotate(-45deg)}
.drawer{position:fixed;top:68px;left:0;right:0;bottom:0;z-index:55;background:#fff;display:flex;flex-direction:column;padding:8px 20px 28px;overflow-y:auto;opacity:0;visibility:hidden;transform:translateY(-6px);transition:opacity .22s ease,transform .22s ease,visibility .22s}
.drawer.open{opacity:1;visibility:visible;transform:translateY(0)}
.drawer-link{padding:16px 2px;font-size:18px;font-weight:500;color:var(--c-text);border-bottom:1px solid var(--c-line-soft)}
.drawer-link.active{color:var(--c-primary)}
.drawer-cta{margin-top:24px}
@media(max-width:1023px){
  .nav-links,.header-cta{display:none}
  .nav-toggle{display:block}
}
@media(min-width:1024px){
  .drawer{display:none}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:46px;padding:0 20px;border-radius:var(--r-btn);font-size:15px;font-weight:600;white-space:nowrap;transition:transform .18s ease,box-shadow .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease}
.btn-primary{background:var(--c-warm);color:#fff;box-shadow:0 10px 22px -14px rgba(217,138,43,.9)}
.btn-primary:hover{background:#C57A1E;transform:translateY(-1px);box-shadow:0 16px 30px -14px rgba(217,138,43,.95)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:#fff;color:var(--c-primary);border:1px solid var(--c-primary)}
.btn-ghost:hover{background:#EDF1F9}
.btn-ghost:active{background:#E3EAF7}
.btn-text{height:auto;padding:0;color:var(--c-primary);font-weight:600}
.btn-text .arrow{display:inline-block;transition:transform .2s ease}
.btn-text:hover .arrow{transform:translateX(4px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn:focus-visible{outline:2px solid var(--c-primary);outline-offset:2px;box-shadow:0 0 0 4px rgba(30,63,143,.16)}

/* ---------- generic ---------- */
.eyebrow{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;background:#EAF0FB;color:var(--c-primary);font-size:12.5px;font-weight:700;letter-spacing:.04em;margin-bottom:14px}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;background:#EAF0FB;color:var(--c-primary);font-size:12.5px;font-weight:700;letter-spacing:.04em}
.tag--accent{background:#E4F5F4;color:#0B7F7F}
.section{padding:96px 0}
.section--alt{background:var(--c-bg-alt)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:36px}
.sec-head h2{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.01em}
.sec-sub{font-size:15.5px;color:var(--c-text-2);margin-top:10px;max-width:640px}
.dot{width:4px;height:4px;border-radius:50%;background:#C3CCDD;display:inline-block}

/* ---------- hero ---------- */
.hero{padding:24px 0 8px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--c-text-3);margin-bottom:18px;flex-wrap:wrap}
.breadcrumb a:hover{color:var(--c-primary)}
.breadcrumb .sep{color:#C3CCDD}
.hero-box{display:grid;grid-template-columns:1.12fr .88fr;gap:32px;align-items:center;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card);padding:24px 28px}
.hero-copy h1{font-size:clamp(26px,3.2vw,36px);line-height:1.24;font-weight:700;letter-spacing:-.01em;margin-bottom:14px}
.hero-sub{font-size:16px;color:var(--c-text-2);margin-bottom:22px}
.hero-actions{display:flex;align-items:center;gap:22px;flex-wrap:wrap;margin-bottom:22px}
.hero-stats{display:flex;align-items:stretch;border-top:1px solid var(--c-line-soft);padding-top:16px}
.hero-stats>div{flex:1;padding-right:16px;border-right:1px solid var(--c-line-soft)}
.hero-stats>div:last-child{border-right:0;padding-right:0;padding-left:16px}
.hero-stats>div:first-child{padding-left:0}
.hero-stats strong{display:block;font-size:19px;font-weight:700;color:var(--c-primary);line-height:1.4}
.hero-stats span{font-size:13px;color:var(--c-text-3)}
.hero-media{position:relative;height:228px;border-radius:var(--r-img);overflow:hidden;background:linear-gradient(135deg,#EDF1F9,#D9E2F3)}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.14),rgba(15,27,51,.26))}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.step-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:26px;box-shadow:var(--sh-card);transition:transform .22s ease,box-shadow .22s ease}
.step-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover)}
.step-num{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:12px;background:#EAF0FB;color:var(--c-primary);font-size:14px;font-weight:700;letter-spacing:.04em;margin-bottom:16px}
.step-card h3{font-size:20px;font-weight:600;line-height:1.5;margin-bottom:10px}
.step-card p{font-size:15px;color:var(--c-text-2);line-height:1.8}

/* ---------- mix grid ---------- */
.mix-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.mix-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-card);overflow:hidden;transition:transform .22s ease,box-shadow .22s ease}
.mix-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover)}
.mix-card--lead{grid-column:span 2;display:grid;grid-template-columns:1fr 1.05fr;align-items:stretch}
.lead-media{position:relative;min-height:238px;background:linear-gradient(135deg,#EDF1F9,#D9E2F3)}
.lead-media img{width:100%;height:100%;object-fit:cover}
.mix-body{padding:26px 28px;display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.mix-body h3{font-size:20px;font-weight:600;line-height:1.5}
.mix-body p{font-size:15px;color:var(--c-text-2);line-height:1.8}
.mix-meta{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--c-text-3);margin-top:auto}
.mix-card--row{display:grid;grid-template-columns:150px 1fr}
.mix-card--row .row-media{position:relative;background:linear-gradient(135deg,#EDF1F9,#D9E2F3)}
.mix-card--row .row-media img{width:100%;height:100%;object-fit:cover}
.mix-card--row .mix-body{padding:20px 22px}

/* ---------- scenarios ---------- */
.split{display:grid;grid-template-columns:.86fr 1.14fr;gap:48px;align-items:start}
.split-left h2{font-size:30px;line-height:1.3;font-weight:700;letter-spacing:-.01em;margin-bottom:14px}
.split-left p{font-size:15.5px;color:var(--c-text-2);margin-bottom:24px;max-width:420px}
.scene-list{display:grid;gap:16px}
.scene-item{display:flex;gap:14px;background:#fff;border:1px solid var(--c-line);border-radius:14px;padding:20px 22px;box-shadow:var(--sh-card);transition:transform .2s ease,box-shadow .2s ease}
.scene-item:hover{transform:translateY(-2px);box-shadow:var(--sh-hover)}
.check{flex:0 0 24px;width:24px;height:24px;border-radius:50%;background:#E4F5F4;color:var(--c-accent);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;margin-top:4px}
.scene-item h3{font-size:17px;font-weight:600;margin-bottom:6px}
.scene-item p{font-size:14.5px;color:var(--c-text-2);line-height:1.75}

/* ---------- faq ---------- */
.faq{max-width:860px;margin:0 auto;display:grid;gap:14px}
.faq-item{position:relative;background:#fff;border:1px solid var(--c-line);border-radius:14px;box-shadow:var(--sh-card);overflow:hidden;transition:background-color .2s ease}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;font-size:17px;font-weight:600;cursor:pointer;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:20px;font-weight:400;color:var(--c-text-3);line-height:1}
.faq-item[open]{background:#F6F8FC}
.faq-item[open] summary::after{content:"−";color:var(--c-primary)}
.faq-item[open]::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c-primary)}
.faq-item summary:hover{color:var(--c-primary)}
.faq-answer{padding:0 24px 22px;font-size:15px;line-height:1.8;color:var(--c-text-2)}

/* ---------- cta band ---------- */
.cta-band{position:relative;background:var(--c-bg-alt);border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line);overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background-image:url('/assets/images/backpic/back-3.webp');background-size:cover;background-position:center;opacity:.1}
.cta-inner{position:relative;display:flex;align-items:center;justify-content:space-between;gap:32px;padding:56px 0;flex-wrap:wrap}
.cta-inner h2{font-size:26px;line-height:1.35;font-weight:700;letter-spacing:-.01em;margin-bottom:10px}
.cta-inner p{font-size:15.5px;color:var(--c-text-2)}
.cta-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--c-bg-alt);border-top:1px solid var(--c-line);padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.5fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-title{font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--c-text);margin-bottom:16px}
.footer-links a{display:block;font-size:14.5px;color:var(--c-text-2);margin-bottom:10px}
.footer-links a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px}
.footer-note{font-size:13.5px;line-height:1.8;color:var(--c-text-3);margin-bottom:10px;max-width:320px}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid var(--c-line);margin-top:32px;padding-top:20px;font-size:13px;color:var(--c-text-3)}

/* ---------- responsive ---------- */
@media(max-width:1023px){
  .section{padding:72px 0}
  .hero-box{grid-template-columns:1fr;gap:24px}
  .hero-media{height:210px}
  .split{grid-template-columns:1fr;gap:32px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .mix-card--lead{grid-template-columns:1fr}
  .lead-media{min-height:200px}
}
@media(max-width:767px){
  .section{padding:56px 0}
  .steps{grid-template-columns:1fr}
  .mix-grid{grid-template-columns:1fr}
  .mix-card--lead{grid-column:span 1}
  .mix-card--row{grid-template-columns:1fr}
  .mix-card--row .row-media{height:170px}
  .sec-head h2,.split-left h2{font-size:23px}
  .hero-box{padding:22px 20px}
  .hero-media{height:190px}
  .hero-stats strong{font-size:17px}
  .cta-inner{padding:44px 0}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 160px}
  .footer-grid{grid-template-columns:1fr}
  .footer-note{max-width:none}
}
@media(max-width:520px){
  .hero-actions{gap:16px}
  .hero-stats{flex-wrap:wrap;gap:12px}
  .hero-stats>div{border-right:0;padding:0;flex:1 1 40%}
  .hero-stats>div:last-child{padding-left:0}
  .faq-item summary{font-size:16px;padding:18px 18px}
  .faq-answer{padding:0 18px 18px}
}

/* roulang page: category2 */
:root{
  --c-primary:#1E3F8F;
  --c-primary-600:#2A54B4;
  --c-primary-800:#16306E;
  --c-accent:#0E9E9E;
  --c-warm:#D98A2B;
  --c-bg:#F5F7FB;
  --c-bg-alt:#EDF1F9;
  --c-line:#E1E7F2;
  --c-line-soft:#EDF1F7;
  --c-text:#0F1B33;
  --c-text-2:#4B5768;
  --c-text-3:#8892A6;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --sh-card:0 1px 2px rgba(15,27,51,.04), 0 10px 28px -14px rgba(15,27,51,.12);
  --sh-hover:0 2px 6px rgba(15,27,51,.06), 0 22px 44px -20px rgba(30,63,143,.28);
  --font: "PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Inter,sans-serif;
}

*,*::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(--c-text);
  background:#fff;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:none;background:none;}
summary{cursor:pointer;}
:focus-visible{outline:none;box-shadow:0 0 0 2px #fff,0 0 0 4px rgba(30,63,143,.55);border-radius:6px;}

.wrap{max-width:1200px;margin:0 auto;padding:0 20px;}
@media(min-width:768px){.wrap{padding:0 32px;}}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:#fff;
  border-bottom:1px solid var(--c-line);
}
.header-inner{
  height:68px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.logo{display:flex;align-items:center;gap:10px;}
.logo-mark{
  width:36px;height:36px;flex:none;
  border-radius:10px;
  background:var(--c-primary);
  color:#fff;
  font-size:18px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  letter-spacing:0;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-main{font-size:15.5px;font-weight:700;color:var(--c-text);letter-spacing:-0.01em;}
.logo-sub{font-size:11.5px;font-weight:500;color:var(--c-text-3);letter-spacing:.08em;}

.nav-links{display:flex;align-items:center;gap:34px;}
.nav-link{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--c-text-2);
  padding:6px 0;
  transition:color .22s ease;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--c-primary);border-radius:2px;
  transition:width .25s ease;
}
.nav-link::before{
  content:"";position:absolute;right:-11px;top:50%;
  width:4px;height:4px;border-radius:50%;
  background:var(--c-primary);
  opacity:0;transform:translateY(-50%) scale(.6);
  transition:opacity .2s ease,transform .2s ease;
}
.nav-link:hover{color:var(--c-primary);}
.nav-link:hover::after{width:18px;}
.nav-link.active{color:var(--c-primary);font-weight:600;}
.nav-link.active::after{width:18px;}
.nav-link.active::before{opacity:1;transform:translateY(-50%) scale(1);}

.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  height:38px;padding:0 18px;
  border:1px solid var(--c-primary);
  border-radius:var(--r-btn);
  font-size:14px;font-weight:600;color:var(--c-primary);
  background:#fff;
  transition:background .2s ease,box-shadow .2s ease,transform .2s ease;
}
.nav-cta:hover{background:var(--c-bg-alt);box-shadow:var(--sh-card);transform:translateY(-1px);}

.nav-toggle{
  display:none;
  width:40px;height:40px;
  align-items:center;justify-content:center;
  border-radius:10px;
  color:var(--c-text);
  transition:background .2s ease;
}
.nav-toggle:hover{background:var(--c-bg);}
.nav-toggle svg{width:24px;height:24px;stroke-width:1.5;}

@media(max-width:960px){
  .nav-links,.nav-cta{display:none;}
  .nav-toggle{display:flex;}
}

.drawer{
  position:fixed;inset:0;z-index:90;
  background:#fff;
  display:none;
  flex-direction:column;
  padding:16px 20px 24px;
}
.drawer.open{display:flex;}
.drawer-head{display:flex;align-items:center;justify-content:space-between;height:52px;}
.drawer-close{
  width:40px;height:40px;display:flex;align-items:center;justify-content:center;
  border-radius:10px;color:var(--c-text);
}
.drawer-close:hover{background:var(--c-bg);}
.drawer-close svg{width:24px;height:24px;stroke-width:1.5;}
.drawer-links{margin-top:18px;flex:1;overflow-y:auto;}
.drawer-links a{
  display:block;
  padding:18px 2px;
  font-size:19px;font-weight:500;color:var(--c-text);
  border-bottom:1px solid var(--c-line-soft);
}
.drawer-links a.active{color:var(--c-primary);font-weight:700;}
.drawer-foot{padding-top:18px;}
.drawer-foot a{
  display:flex;align-items:center;justify-content:center;
  height:50px;border-radius:var(--r-btn);
  background:var(--c-warm);color:#fff;font-weight:600;font-size:16px;
}

/* ---------- 面包屑 ---------- */
.crumbs{background:#fff;border-bottom:1px solid var(--c-line-soft);}
.crumbs-inner{
  display:flex;align-items:center;gap:8px;
  height:52px;font-size:13.5px;color:var(--c-text-3);
  overflow-x:auto;white-space:nowrap;
}
.crumbs-inner a{color:var(--c-text-2);transition:color .2s ease;}
.crumbs-inner a:hover{color:var(--c-primary);}
.crumbs-inner .sep{color:#C3CBDD;}
.crumbs-inner .now{color:var(--c-text-3);}

/* ---------- 页头（居中） ---------- */
.page-head{background:#fff;padding:56px 0 52px;text-align:center;}
@media(min-width:768px){.page-head{padding:72px 0 60px;}}
.eyebrow{
  display:inline-flex;align-items:center;gap:7px;
  height:26px;padding:0 12px;
  border-radius:999px;
  background:#EAF0FC;color:var(--c-primary);
  font-size:12.5px;font-weight:700;letter-spacing:.04em;
}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--c-accent);display:block;}
.page-title{
  margin-top:20px;
  font-size:32px;line-height:1.3;font-weight:700;letter-spacing:-0.01em;color:var(--c-text);
}
@media(min-width:768px){.page-title{font-size:40px;line-height:1.22;}}
.page-sub{
  margin:16px auto 0;
  max-width:640px;
  font-size:16px;line-height:1.8;color:var(--c-text-2);
}
.head-stats{
  margin-top:36px;
  display:grid;
  grid-template-columns:1fr;
  gap:0;
  border-top:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
}
@media(min-width:768px){
  .head-stats{grid-template-columns:repeat(3,1fr);max-width:860px;margin-left:auto;margin-right:auto;}
}
.head-stat{padding:22px 12px;border-bottom:1px solid var(--c-line-soft);}
.head-stat:last-child{border-bottom:none;}
@media(min-width:768px){
  .head-stat{border-bottom:none;border-right:1px solid var(--c-line-soft);}
  .head-stat:last-child{border-right:none;}
}
.head-stat strong{
  display:block;
  font-size:26px;font-weight:700;color:var(--c-primary);
  line-height:1.3;letter-spacing:-0.01em;
}
.head-stat span{display:block;margin-top:4px;font-size:13px;color:var(--c-text-3);}

/* ---------- 通用 ---------- */
.section{padding:56px 0;}
@media(min-width:768px){.section{padding:72px 0;}}
@media(min-width:1024px){.section{padding:96px 0;}}
.section-alt{background:var(--c-bg-alt);}
.section-soft{background:var(--c-bg);}
.section-white{background:#fff;}

.sec-head{max-width:720px;}
.sec-title{
  font-size:24px;line-height:1.32;font-weight:700;color:var(--c-text);letter-spacing:-0.01em;
}
@media(min-width:768px){.sec-title{font-size:30px;line-height:1.3;}}
.sec-desc{margin-top:14px;font-size:15.5px;line-height:1.8;color:var(--c-text-2);}
.sec-title-bar{position:relative;padding-left:16px;}
.sec-title-bar::before{
  content:"";position:absolute;left:0;top:.28em;bottom:.28em;
  width:4px;border-radius:3px;background:var(--c-primary);
}

.h3{font-size:19px;line-height:1.5;font-weight:600;color:var(--c-text);}

.card{
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  padding:26px;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.card-hover:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#D3DDF0;}

.img-cover{
  width:100%;aspect-ratio:16/9;object-fit:cover;
  border-radius:var(--r-img);
  background:linear-gradient(135deg,#E6EDFA,#D6E1F5);
  border:1px solid var(--c-line-soft);
}

.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 11px;
  border-radius:999px;
  font-size:12.5px;font-weight:700;letter-spacing:.04em;
}
.tag-brand{background:#EAF0FC;color:var(--c-primary);}
.tag-accent{background:#E3F5F5;color:#0B7C7C;}
.tag-warm{background:#FCF1E1;color:#A9661A;}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:600;color:var(--c-primary);
}
.link-arrow svg{width:15px;height:15px;stroke-width:2;transition:transform .22s ease;}
.link-arrow:hover svg{transform:translateX(4px);}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;
  border-radius:var(--r-btn);
  font-size:15.5px;font-weight:600;
  transition:background .2s ease,box-shadow .2s ease,transform .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{
  background:var(--c-warm);color:#fff;
  box-shadow:0 1px 2px rgba(15,27,51,.06),0 10px 22px -12px rgba(217,138,43,.75);
}
.btn-primary:hover{
  background:#C57A21;transform:translateY(-2px);
  box-shadow:0 2px 6px rgba(15,27,51,.08),0 20px 36px -16px rgba(217,138,43,.85);
}
.btn-outline{
  background:#fff;color:var(--c-primary);
  border:1px solid var(--c-primary);
}
.btn-outline:hover{background:var(--c-bg-alt);transform:translateY(-2px);box-shadow:var(--sh-card);}

/* ---------- 图文块 ---------- */
.split-text p{font-size:16px;line-height:1.85;color:var(--c-text-2);}
.split-text p + p{margin-top:14px;}
.dot-list{margin-top:22px;display:flex;flex-direction:column;gap:12px;}
.dot-list li{
  position:relative;padding-left:20px;
  font-size:15px;line-height:1.75;color:var(--c-text);
}
.dot-list li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:7px;height:7px;border-radius:50%;background:var(--c-accent);
}

/* ---------- 时间轴 ---------- */
.timeline{position:relative;max-width:860px;margin:40px auto 0;padding-left:28px;}
.timeline::before{
  content:"";position:absolute;left:6px;top:10px;bottom:10px;width:1px;background:var(--c-line);
}
.tl-item{position:relative;padding-bottom:18px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-28px;top:28px;
  width:13px;height:13px;border-radius:50%;
  background:#fff;border:2px solid var(--c-primary);
  box-shadow:0 0 0 4px rgba(30,63,143,.08);
}
.tl-card{
  background:#fff;
  border:1px solid var(--c-line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  padding:24px 26px;
  display:flex;
  align-items:flex-start;
  gap:18px;
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.tl-card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#D3DDF0;}
.tl-body{flex:1;min-width:0;}
.tl-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:12.5px;color:var(--c-text-3);letter-spacing:.03em;
}
.tl-meta .sep{width:1px;height:12px;background:var(--c-line);}
.tl-title{margin-top:10px;font-size:19px;font-weight:600;line-height:1.5;color:var(--c-text);}
.tl-desc{margin-top:8px;font-size:15px;line-height:1.8;color:var(--c-text-2);}
.tl-arrow{
  flex:none;width:34px;height:34px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--c-line);
  color:var(--c-primary);
  transition:background .2s ease,transform .2s ease,border-color .2s ease;
}
.tl-arrow svg{width:15px;height:15px;stroke-width:2;}
.tl-card:hover .tl-arrow{background:#EAF0FC;border-color:#C9D8F3;transform:translateX(3px);}

/* ---------- 异常对照 ---------- */
.signal-list{margin-top:36px;border-top:1px solid var(--c-line);}
.signal-row{
  display:grid;grid-template-columns:1fr;gap:6px;
  padding:20px 0;border-bottom:1px solid var(--c-line);
}
@media(min-width:768px){
  .signal-row{grid-template-columns:300px 1fr;gap:28px;align-items:start;}
}
.signal-sign{
  display:flex;align-items:flex-start;gap:10px;
  font-size:15.5px;font-weight:600;color:var(--c-text);line-height:1.7;
}
.signal-sign i{
  flex:none;width:8px;height:8px;border-radius:50%;background:var(--c-warm);
  margin-top:.66em;
}
.signal-act{font-size:15px;line-height:1.8;color:var(--c-text-2);}

/* ---------- 安全清单 ---------- */
.check-list{display:flex;flex-direction:column;gap:14px;margin-top:8px;}
.check-list li{
  display:flex;align-items:flex-start;gap:12px;
  font-size:15.5px;line-height:1.75;color:var(--c-text);
  padding-bottom:14px;border-bottom:1px dashed var(--c-line);
}
.check-list li:last-child{border-bottom:none;padding-bottom:0;}
.check-list .ico{
  flex:none;width:22px;height:22px;border-radius:50%;
  background:#E3F5F5;color:#0B7C7C;
  display:flex;align-items:center;justify-content:center;
  margin-top:2px;
}
.check-list .ico svg{width:13px;height:13px;stroke-width:3;}

/* ---------- FAQ ---------- */
.faq-list{max-width:860px;margin:36px auto 0;display:flex;flex-direction:column;gap:12px;}
.faq-item{
  background:#fff;
  border:1px solid var(--c-line);
  border-left:3px solid transparent;
  border-radius:12px;
  transition:background .2s ease,border-color .2s ease;
}
.faq-item[open]{background:#F6F8FC;border-left-color:var(--c-primary);}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;
  font-size:17px;font-weight:600;line-height:1.55;color:var(--c-text);
  list-style:none;
}
.faq-q::-webkit-details-marker{display:none;}
.faq-q .mark{
  flex:none;width:22px;height:22px;position:relative;
  border-radius:50%;border:1px solid var(--c-line);
  background:#fff;
}
.faq-q .mark::before,
.faq-q .mark::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-primary);
  transform:translate(-50%,-50%);
  transition:opacity .2s ease,transform .2s ease;
}
.faq-q .mark::before{width:10px;height:1.6px;}
.faq-q .mark::after{width:1.6px;height:10px;}
.faq-item[open] .faq-q .mark::after{opacity:0;transform:translate(-50%,-50%) scaleY(.2);}
.faq-a{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--c-text-2);}

/* ---------- CTA ---------- */
.cta-bar{
  position:relative;
  overflow:hidden;
  background:var(--c-bg-alt);
  border-top:1px solid var(--c-line);
  padding:56px 0;
}
@media(min-width:768px){.cta-bar{padding:72px 0;}}
.cta-bar::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.13;
}
.cta-inner{
  position:relative;
  display:flex;flex-direction:column;gap:26px;
  align-items:flex-start;
}
@media(min-width:1024px){
  .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:48px;}
}
.cta-title{font-size:24px;line-height:1.35;font-weight:700;color:var(--c-text);letter-spacing:-0.01em;}
@media(min-width:768px){.cta-title{font-size:30px;line-height:1.3;}}
.cta-desc{margin-top:12px;font-size:15.5px;line-height:1.8;color:var(--c-text-2);max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;width:100%;}
@media(min-width:1024px){.cta-actions{width:auto;flex:none;}}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-bg-alt);
  border-top:1px solid var(--c-line);
  padding:48px 0 26px;
}
@media(min-width:768px){.site-footer{padding:56px 0 28px;}}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
}
@media(min-width:700px){.footer-grid{grid-template-columns:1fr 1fr;}}
@media(min-width:1024px){.footer-grid{grid-template-columns:1.7fr 1fr 1fr 1.5fr;gap:36px;}}
.footer-brand{display:flex;align-items:center;gap:10px;}
.footer-title{
  font-size:13px;font-weight:700;color:var(--c-text);
  letter-spacing:.04em;margin-bottom:14px;
}
.footer-links a{
  display:block;padding:5px 0;font-size:14px;color:var(--c-text-2);
  transition:color .2s ease;
}
.footer-links a:hover{color:var(--c-primary);text-decoration:underline;text-underline-offset:3px;}
.footer-note{margin-top:14px;font-size:14px;line-height:1.75;color:var(--c-text-2);}
.footer-bottom{
  margin-top:34px;padding-top:20px;
  border-top:1px solid var(--c-line);
  display:flex;flex-direction:column;gap:8px;
  font-size:13px;color:var(--c-text-3);line-height:1.7;
}
@media(min-width:768px){
  .footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}
}

/* roulang page: category3 */
:root{
    --c-primary:#1E3F8F;
    --c-primary-600:#2A54B4;
    --c-primary-800:#16306E;
    --c-accent:#0E9E9E;
    --c-warm:#D98A2B;
    --c-bg:#F5F7FB;
    --c-bg-alt:#EDF1F9;
    --c-line:#E1E7F2;
    --c-line-soft:#EDF1F7;
    --t-1:#0F1B33;
    --t-2:#4B5768;
    --t-3:#8892A6;
    --r-card:16px;
    --r-btn:10px;
    --shadow-card:0 1px 2px rgba(15,27,51,.04), 0 10px 28px -14px rgba(15,27,51,.12);
    --shadow-hover:0 2px 6px rgba(15,27,51,.06), 0 22px 44px -20px rgba(30,63,143,.28);
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;line-height:1.85;color:var(--t-1);
    background:var(--c-bg);
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:var(--c-primary-600);text-decoration:none}
  h1,h2,h3{letter-spacing:-.01em;margin:0}
  h1{line-height:1.22;font-weight:700;font-size:40px}
  h2{line-height:1.3;font-weight:700}
  h3{font-size:20px;line-height:1.5;font-weight:600}
  p{margin:0}
  button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
  :focus-visible{outline:2px solid var(--c-primary-600);outline-offset:2px;border-radius:6px}

  .wrap{max-width:1200px;margin:0 auto;padding:0 20px}
  @media (min-width:768px){.wrap{padding:0 32px}}

  /* ---------- 头部导航 ---------- */
  .site-header{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--c-line)}
  .nav-inner{max-width:1200px;margin:0 auto;padding:0 20px;height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
  @media (min-width:768px){.nav-inner{padding:0 32px}}
  .brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none}
  .logo-mark{
    width:36px;height:36px;border-radius:11px;background:var(--c-primary);color:#fff;
    display:inline-flex;align-items:center;justify-content:center;
    font-size:16px;font-weight:700;letter-spacing:0;flex:none;
  }
  .logo-text{display:flex;flex-direction:column;line-height:1.15}
  .logo-main{font-size:15px;font-weight:700;color:var(--t-1);letter-spacing:-.01em}
  .logo-sub{font-size:11.5px;font-weight:600;color:var(--t-3);letter-spacing:.16em}
  .nav-links{display:flex;align-items:center;gap:32px}
  .nav-link{
    position:relative;display:inline-block;padding:22px 0;
    font-size:15px;font-weight:500;color:var(--t-2);transition:color .18s ease;
  }
  .nav-link::after{
    content:"";position:absolute;left:50%;bottom:14px;width:0;height:2px;
    background:var(--c-primary);transform:translateX(-50%);transition:width .22s ease;border-radius:2px;
  }
  .nav-link:hover{color:var(--c-primary)}
  .nav-link:hover::after{width:18px}
  .nav-link.active{color:var(--c-primary);font-weight:600}
  .nav-link.active::after{width:18px}
  .nav-link.active::before{
    content:"";position:absolute;right:-13px;top:50%;width:4px;height:4px;border-radius:50%;
    background:var(--c-primary);transform:translateY(-50%);
  }
  .nav-actions{display:flex;align-items:center;gap:12px}
  .nav-toggle{display:none;width:40px;height:40px;border-radius:10px;color:var(--t-1);align-items:center;justify-content:center;transition:background .18s ease}
  .nav-toggle:hover{background:var(--c-bg-alt)}
  .nav-drawer{
    display:none;position:fixed;left:0;right:0;top:68px;bottom:0;background:#fff;z-index:59;
    flex-direction:column;padding:8px 20px 24px;overflow-y:auto;
  }
  .nav-drawer.open{display:flex}
  .nav-drawer a{
    display:block;padding:18px 4px;font-size:17px;font-weight:600;color:var(--t-1);
    border-bottom:1px solid var(--c-line-soft);
  }
  .nav-drawer a.active{color:var(--c-primary)}
  .drawer-cta{margin-top:auto;padding-top:24px}
  .drawer-cta .btn{width:100%;text-align:center;justify-content:center}
  @media (max-width:1024px){
    .nav-links{display:none}
    .nav-actions .btn-ghost{display:none}
    .nav-toggle{display:inline-flex}
  }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:48px;padding:0 24px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;letter-spacing:0;
    transition:background .18s ease, box-shadow .18s ease, transform .18s ease, color .18s ease, border-color .18s ease;
  }
  .btn-sm{height:38px;padding:0 16px;font-size:14px;border-radius:9px}
  .btn-warm{background:var(--c-warm);color:#fff;box-shadow:0 8px 22px -12px rgba(217,138,43,.75)}
  .btn-warm:hover{background:#C67A1F;transform:translateY(-1px);box-shadow:0 14px 28px -14px rgba(217,138,43,.85)}
  .btn-warm:active{transform:translateY(0)}
  .btn-ghost{background:#fff;color:var(--c-primary);border:1px solid var(--c-primary);}
  .btn-ghost:hover{background:var(--c-bg-alt);transform:translateY(-1px)}
  .btn-text{color:var(--c-primary);font-weight:600;display:inline-flex;align-items:center;gap:6px;font-size:15px}
  .btn-text span{transition:transform .2s ease}
  .btn-text:hover span{transform:translateX(4px)}

  /* ---------- 通用板块 ---------- */
  .section{padding:96px 0}
  .section-alt{background:var(--c-bg-alt)}
  @media (max-width:1024px){.section{padding:72px 0}}
  @media (max-width:640px){.section{padding:56px 0}}
  .sec-head{max-width:760px;margin-bottom:34px}
  .sec-head.between{max-width:none;display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
  .eyebrow{
    display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.04em;
    color:var(--c-primary-600);background:#E7EDF9;border-radius:999px;padding:4px 12px;margin-bottom:14px;
  }
  .sec-title{font-size:30px;font-weight:700}
  .sec-desc{margin-top:14px;font-size:16px;line-height:1.85;color:var(--t-2)}
  @media (max-width:640px){.sec-title{font-size:24px}}

  /* ---------- 页头 ---------- */
  .page-head{padding:44px 0 34px;background:#fff;border-bottom:1px solid var(--c-line)}
  .breadcrumb{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--t-3);margin-bottom:20px}
  .breadcrumb a{color:var(--t-2)}
  .breadcrumb a:hover{color:var(--c-primary)}
  .breadcrumb .sep{color:#C2CADE}
  .breadcrumb .current{color:var(--t-3)}
  .page-head h1{max-width:900px}
  .head-lead{margin-top:16px;font-size:17px;color:var(--t-2);max-width:760px}
  .head-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
  .chip{
    display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:999px;
    font-size:12.5px;font-weight:700;letter-spacing:.04em;
  }
  .chip-primary{background:#E7EDF9;color:var(--c-primary-600)}
  .chip-accent{background:rgba(14,158,158,.12);color:#0B7C7C}
  .chip-muted{background:#F0F3F9;color:var(--t-2)}

  /* ---------- 锚点标签条 ---------- */
  .anchor-bar{position:sticky;top:68px;z-index:40;background:#fff;border-bottom:1px solid var(--c-line)}
  .anchor-inner{display:flex;gap:10px;overflow-x:auto;padding:14px 0;scrollbar-width:thin}
  .anchor-chip{
    flex:none;display:inline-flex;align-items:center;height:34px;padding:0 16px;border-radius:999px;
    font-size:14px;font-weight:500;color:var(--t-2);background:#F4F6FB;border:1px solid transparent;
    transition:color .18s ease, background .18s ease, border-color .18s ease;
  }
  .anchor-chip:hover{color:var(--c-primary);background:#E7EDF9}
  .anchor-chip.active{color:#fff;background:var(--c-primary);border-color:var(--c-primary);font-weight:600}

  /* ---------- 卡片网格 ---------- */
  .card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
  @media (max-width:1024px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}}
  @media (max-width:640px){.card-grid{grid-template-columns:1fr;gap:18px}}
  .card{
    background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    box-shadow:var(--shadow-card);overflow:hidden;display:flex;flex-direction:column;
    transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
  }
  .card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:#D6DFF0}
  .thumb{position:relative;aspect-ratio:16/9;background:linear-gradient(135deg,#E4EBF8,#F5F7FB);overflow:hidden}
  .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
  .card:hover .thumb img{transform:scale(1.03)}
  .card-body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1}
  .card-body h3{margin-top:12px;font-size:18px;color:var(--t-1)}
  .card-body p{margin-top:10px;font-size:14.5px;line-height:1.8;color:var(--t-2);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .card-foot{
    margin-top:auto;padding-top:16px;display:flex;align-items:center;justify-content:space-between;
    gap:12px;font-size:13px;color:var(--t-3);
  }
  .arrow-link{font-size:13.5px;font-weight:600;color:var(--c-primary);display:inline-flex;align-items:center;gap:4px}
  .arrow-link i{font-style:normal;transition:transform .2s ease}
  .arrow-link:hover i{transform:translateX(3px)}

  /* ---------- 对比表 ---------- */
  .cmp-wrap{
    margin-top:8px;background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    box-shadow:var(--shadow-card);overflow-x:auto;
  }
  table.cmp{width:100%;border-collapse:collapse;min-width:780px}
  .cmp th,.cmp td{padding:0 24px;height:56px;text-align:left;font-size:15px;border-bottom:1px solid var(--c-line-soft)}
  .cmp thead th{height:60px;font-size:14px;font-weight:600;color:var(--t-2);background:#FAFBFE}
  .cmp tbody tr:nth-child(even){background:#FAFBFE}
  .cmp tbody tr:last-child td{border-bottom:none}
  .cmp th:first-child,.cmp td:first-child{width:220px;color:var(--t-1);font-weight:600}
  .cmp .reco{background:#F6F9FE;border-left:1px solid var(--c-primary);border-right:1px solid var(--c-primary)}
  .cmp thead th.reco{border-top:1px solid var(--c-primary)}
  .cmp tbody tr:last-child td.reco{border-bottom:1px solid var(--c-primary)}
  .th-reco{display:inline-flex;align-items:center;gap:8px}
  .mark-yes{
    display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;
    background:rgba(14,158,158,.14);color:#0B7C7C;font-size:12px;font-weight:700;line-height:1;
  }
  .mark-no{display:inline-block;width:16px;height:2px;border-radius:2px;background:#D6DCE8;vertical-align:middle}
  .cmp-note{margin-top:14px;font-size:13.5px;color:var(--t-3)}

  /* ---------- 步骤 ---------- */
  .steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
  @media (max-width:1024px){.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (max-width:560px){.steps{grid-template-columns:1fr}}
  .step{
    background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    padding:24px;box-shadow:var(--shadow-card);transition:transform .22s ease, box-shadow .22s ease;
  }
  .step:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
  .step-num{
    width:34px;height:34px;border-radius:11px;background:var(--c-primary);color:#fff;
    display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;margin-bottom:16px;
  }
  .step h3{font-size:17px}
  .step p{margin-top:8px;font-size:14.5px;line-height:1.8;color:var(--t-2)}

  /* ---------- 适用情况 ---------- */
  .scene{display:grid;grid-template-columns:5fr 7fr;gap:44px;align-items:center}
  @media (max-width:1024px){.scene{grid-template-columns:1fr;gap:28px}}
  .scene-figure{border-radius:var(--r-card);overflow:hidden;border:1px solid var(--c-line);box-shadow:var(--shadow-card);background:#fff}
  .scene-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
  .scene-list{list-style:none;margin:0;padding:0;display:grid;gap:18px}
  .scene-item{
    background:#fff;border:1px solid var(--c-line);border-radius:14px;padding:20px 22px;
    display:flex;gap:16px;box-shadow:var(--shadow-card);transition:transform .22s ease, box-shadow .22s ease;
  }
  .scene-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
  .scene-icon{
    flex:none;width:34px;height:34px;border-radius:10px;background:rgba(14,158,158,.12);
    color:#0B7C7C;display:flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;
  }
  .scene-item h3{font-size:17px}
  .scene-item p{margin-top:6px;font-size:14.5px;line-height:1.8;color:var(--t-2)}

  /* ---------- FAQ ---------- */
  .faq-list{max-width:860px;margin:0 auto}
  .faq-item{
    background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);
    box-shadow:var(--shadow-card);margin-bottom:14px;overflow:hidden;
    transition:box-shadow .2s ease, border-color .2s ease;
  }
  .faq-item:hover{box-shadow:var(--shadow-hover)}
  .faq-item summary{
    position:relative;list-style:none;cursor:pointer;padding:20px 56px 20px 24px;
    font-size:17px;font-weight:600;color:var(--t-1);transition:background .2s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary::before{
    content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
    background:var(--c-primary);opacity:0;transition:opacity .2s ease;
  }
  .faq-item summary::after{
    content:"+";position:absolute;right:24px;top:50%;transform:translateY(-50%);
    font-size:20px;font-weight:400;color:var(--t-3);transition:color .2s ease;
  }
  .faq-item[open] summary{background:#F6F8FC}
  .faq-item[open] summary::before{opacity:1}
  .faq-item[open] summary::after{content:"–";color:var(--c-primary)}
  .faq-answer{padding:6px 24px 22px;font-size:15px;line-height:1.85;color:var(--t-2);background:#F6F8FC}

  /* ---------- 分页占位 ---------- */
  .pager{display:flex;justify-content:center;align-items:center;gap:8px;margin-top:44px;flex-wrap:wrap}
  .pager-item{
    min-width:40px;height:40px;padding:0 14px;border-radius:10px;background:#fff;
    border:1px solid var(--c-line);color:var(--t-2);font-size:14px;
    display:inline-flex;align-items:center;justify-content:center;
  }
  .pager-item.active{background:var(--c-primary);border-color:var(--c-primary);color:#fff;font-weight:600}
  .pager-item.muted{color:#B4BDCF}

  /* ---------- 底部 CTA ---------- */
  .cta-band{background:var(--c-bg-alt);border-top:1px solid var(--c-line);padding:64px 0}
  .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
  .cta-inner h2{font-size:28px}
  .cta-inner p{margin-top:12px;font-size:15.5px;color:var(--t-2);max-width:560px}
  .cta-actions{display:flex;gap:14px;flex-wrap:wrap}
  @media (max-width:640px){
    .cta-band{padding:48px 0}
    .cta-inner h2{font-size:23px}
    .cta-actions{width:100%}
    .cta-actions .btn{flex:1 1 auto}
  }

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--c-bg-alt);border-top:1px solid var(--c-line);padding:56px 0 24px}
  .footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.5fr;gap:40px}
  @media (max-width:1024px){.footer-grid{grid-template-columns:1fr 1fr;gap:32px}}
  @media (max-width:560px){.footer-grid{grid-template-columns:1fr;gap:26px}}
  .footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
  .footer-title{font-size:14px;font-weight:700;color:var(--t-1);margin-bottom:12px;letter-spacing:.01em}
  .footer-links a{display:block;font-size:14px;color:var(--t-2);padding:5px 0;transition:color .18s ease}
  .footer-links a:hover{color:var(--c-primary);text-decoration:underline}
  .footer-note{font-size:13.5px;line-height:1.75;color:var(--t-3);margin-bottom:10px;max-width:360px}
  .footer-bottom{
    display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    margin-top:40px;padding-top:18px;border-top:1px solid var(--c-line);
    font-size:13px;color:var(--t-3);
  }