/* roulang page: index */
:root{
  --brand-700:#1B37A0; --brand-600:#2549C8; --brand-500:#3D63E0; --brand-50:#EEF2FF; --brand-25:#F5F7FE;
  --teal-600:#0FA98F; --teal-50:#E7F7F3;
  --amber-500:#F97316;
  --ink-900:#0F172A; --ink-600:#475569; --ink-400:#94A3B8;
  --line:#E6ECF5; --bg:#F6F8FC; --surface:#FFFFFF; --surface-alt:#EEF3FB;
  --r-card:16px; --r-btn:10px; --r-img:12px; --r-pill:999px;
  --sh-card:0 1px 2px rgba(15,23,42,.04), 0 8px 24px rgba(37,73,200,.08);
  --sh-hover:0 14px 34px rgba(37,73,200,.16);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--ink-600);
  font-family:'PingFang SC','HarmonyOS Sans','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.25;letter-spacing:-.01em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
summary{list-style:none;cursor:pointer;}
summary::-webkit-details-marker{display:none;}
summary::marker{content:'';}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px;}

.container-main{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
.container-wide{width:100%;max-width:1280px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:1024px){
  .container-main,.container-wide{padding-left:32px;padding-right:32px;}
}
.section{padding-top:64px;padding-bottom:64px;}
@media (min-width:1024px){
  .section{padding-top:96px;padding-bottom:96px;}
}
.section-alt{background:var(--surface-alt);}

/* 顶部通告条 */
.notice-bar{background:var(--brand-50);border-bottom:1px solid rgba(37,73,200,.12);font-size:14px;color:var(--brand-700);}
.notice-bar .inner{display:flex;align-items:center;justify-content:center;gap:12px;min-height:40px;padding:6px 20px;flex-wrap:wrap;text-align:center;}
.notice-dot{width:8px;height:8px;border-radius:50%;background:var(--teal-600);box-shadow:0 0 0 4px rgba(15,169,143,.16);flex:0 0 auto;}

/* 导航 */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:saturate(160%) blur(8px);border-bottom:1px solid var(--line);transition:box-shadow .2s ease-out;}
.site-header.is-stuck{box-shadow:0 8px 24px rgba(15,23,42,.06);}
.nav-wrap{display:flex;align-items:center;gap:20px;min-height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{width:40px;height:40px;border-radius:12px;background:linear-gradient(150deg,var(--brand-600),var(--brand-700));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:17px;letter-spacing:.02em;box-shadow:0 8px 18px rgba(37,73,200,.24);}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text strong{font-size:16px;font-weight:700;color:var(--ink-900);letter-spacing:-.01em;}
.brand-text span{font-size:12px;color:var(--ink-400);letter-spacing:.06em;}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-link{position:relative;display:inline-flex;align-items:center;height:44px;padding:0 14px;border-radius:var(--r-btn);font-size:15px;font-weight:500;color:var(--ink-600);transition:color .2s ease-out,background .2s ease-out;}
.nav-link:hover{color:var(--brand-600);background:var(--brand-25);}
.nav-link.active{color:var(--brand-600);font-weight:600;}
.nav-link.active::after{content:'';position:absolute;left:14px;right:14px;bottom:5px;height:2px;border-radius:2px;background:var(--brand-600);}
.nav-cta{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 18px;border-radius:var(--r-btn);background:var(--brand-600);color:#fff;font-size:15px;font-weight:600;box-shadow:0 8px 20px rgba(37,73,200,.22);transition:background .2s ease-out,transform .2s ease-out;}
.nav-cta:hover{background:var(--brand-700);transform:translateY(-2px);}

/* Mega 面板 */
.mega{position:relative;}
.mega-panel{
  position:absolute;right:0;top:calc(100% + 10px);width:680px;
  background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--sh-hover);
  padding:22px;opacity:0;visibility:hidden;transform:translateY(4px);
  transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s;z-index:70;
}
.mega:hover .mega-panel,.mega:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
.mega-grid{display:grid;grid-template-columns:1.1fr 1fr .95fr;gap:22px;}
.mega-title{font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--ink-400);margin-bottom:12px;text-transform:uppercase;}
.mega-pill{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border-radius:var(--r-pill);background:var(--brand-50);color:var(--brand-700);font-size:13px;font-weight:500;transition:background .2s ease-out,color .2s ease-out;}
.mega-pill:hover{background:var(--brand-600);color:#fff;}
.mega-list li+li{margin-top:12px;}
.mega-list a{display:block;font-size:14px;color:var(--ink-600);transition:color .2s ease-out;}
.mega-list a:hover{color:var(--brand-600);}
.mega-list time{display:block;font-size:12px;color:var(--ink-400);margin-top:2px;}
.mega-card{background:var(--brand-25);border:1px solid rgba(37,73,200,.14);border-radius:14px;padding:16px;}
.mega-card strong{display:block;color:var(--ink-900);font-size:15px;margin-bottom:6px;}
.mega-card p{font-size:13px;line-height:1.7;color:var(--ink-600);}
.mega-card a{display:inline-flex;align-items:center;gap:6px;margin-top:10px;font-size:13px;font-weight:600;color:var(--brand-600);}

/* 移动菜单 */
.mobile-menu{position:relative;margin-left:auto;display:none;}
.mobile-toggle{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);background:#fff;color:var(--ink-900);}
.mobile-panel{position:absolute;right:0;top:calc(100% + 10px);width:min(88vw,340px);background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--sh-hover);padding:10px;z-index:80;}
.mobile-panel a{display:flex;align-items:center;min-height:48px;padding:0 14px;border-radius:10px;font-size:15px;color:var(--ink-600);}
.mobile-panel a+a{border-top:1px solid var(--line);}
.mobile-panel a.active{color:var(--brand-600);font-weight:600;background:var(--brand-25);}
@media (max-width:1023px){
  .nav-links{display:none;}
  .mobile-menu{display:block;}
  .nav-cta{display:none;}
}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:background .2s ease-out,color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 10px 22px rgba(37,73,200,.24);}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-2px);box-shadow:0 14px 30px rgba(37,73,200,.3);}
.btn-outline{background:#fff;color:var(--brand-600);border-color:rgba(37,73,200,.3);}
.btn-outline:hover{background:var(--brand-25);transform:translateY(-2px);}
.btn-ghost{background:transparent;color:var(--brand-600);padding:0 4px;min-height:36px;}
.btn-ghost:hover{gap:14px;}

/* 标签与徽章 */
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--brand-600);background:var(--brand-50);border:1px solid rgba(37,73,200,.14);padding:6px 14px;border-radius:var(--r-pill);}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--r-pill);font-size:12px;font-weight:600;background:var(--teal-50);color:var(--teal-600);}
.badge-brand{background:var(--brand-50);color:var(--brand-600);}
.tag{display:inline-flex;align-items:center;padding:6px 12px;border-radius:var(--r-pill);background:#fff;border:1px solid var(--line);font-size:13px;color:var(--ink-600);}

/* 卡片 */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;overflow:hidden;}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(37,73,200,.28);}
.card:hover .card-title{color:var(--brand-600);}
.card-title{color:var(--ink-900);font-weight:600;transition:color .2s ease-out;}
.card-body{padding:22px;}
.card-img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0;}
.thumb{border-radius:var(--r-img);overflow:hidden;}
.line-clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.line-clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}

/* 价值主张 */
.value-wide{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);padding:28px;}
.value-mini{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);padding:22px;height:100%;transition:transform .2s ease-out,box-shadow .2s ease-out;}
.value-mini:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);}
.icon-box{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:var(--brand-50);color:var(--brand-600);font-size:18px;}

/* 步骤时间轴 */
.step-item{position:relative;padding-left:56px;padding-bottom:30px;}
.step-item:last-child{padding-bottom:0;}
.step-item::before{content:'';position:absolute;left:19px;top:44px;bottom:2px;width:2px;background:linear-gradient(180deg,rgba(37,73,200,.35),rgba(37,73,200,.06));}
.step-item:last-child::before{display:none;}
.step-num{position:absolute;left:0;top:0;width:40px;height:40px;border-radius:50%;background:var(--brand-600);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;box-shadow:0 8px 18px rgba(37,73,200,.2);}

/* 表单壳 */
.form-shell{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-card);padding:26px;}
.field-label{display:block;font-size:14px;font-weight:500;color:var(--ink-600);margin-bottom:8px;}
.field{width:100%;height:48px;border:1px solid var(--line);border-radius:var(--r-btn);padding:0 14px;background:#fff;color:var(--ink-900);transition:border-color .2s ease-out,box-shadow .2s ease-out;}
.field::placeholder{color:var(--ink-400);}
.field:focus{outline:none;border-color:var(--brand-600);box-shadow:0 0 0 3px rgba(37,73,200,.18);}
.field-hint{font-size:13px;color:var(--ink-400);margin-top:6px;}

/* 场景 */
.scene-index{font-size:64px;font-weight:700;color:rgba(37,73,200,.12);line-height:1;}
@media (min-width:1024px){.scene-index{font-size:86px;}}

/* 方案 */
.plan{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:28px;box-shadow:var(--sh-card);display:flex;flex-direction:column;height:100%;}
.plan-featured{border:2px solid var(--brand-600);transform:translateY(-12px);box-shadow:0 18px 40px rgba(37,73,200,.18);position:relative;}
.plan-price{font-size:32px;font-weight:700;color:var(--ink-900);letter-spacing:-.02em;}
.plan-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--ink-600);padding:6px 0;}
.plan-list .tick{color:var(--teal-600);font-weight:700;flex:0 0 auto;}

/* FAQ */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:12px;transition:background .2s ease-out,border-color .2s ease-out;overflow:hidden;}
.faq-item[open]{background:var(--brand-25);border-color:rgba(37,73,200,.28);border-left:4px solid var(--brand-600);}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;font-size:17px;font-weight:600;color:var(--ink-900);}
.faq-plus{width:26px;height:26px;flex:0 0 auto;border-radius:50%;background:#fff;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;color:var(--brand-600);font-size:16px;line-height:1;transition:transform .2s ease-out,background .2s ease-out,color .2s ease-out;}
.faq-item[open] .faq-plus{transform:rotate(45deg);background:var(--brand-600);color:#fff;border-color:var(--brand-600);}
.faq-a{padding:0 22px 20px;font-size:15px;line-height:1.75;color:var(--ink-600);}

/* 空态 */
.empty-state{border:2px dashed var(--line);border-radius:var(--r-card);background:#fff;padding:48px 24px;text-align:center;}
.empty-icon{width:56px;height:56px;border-radius:16px;background:var(--brand-50);color:var(--brand-600);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:22px;}

/* CTA 横幅 */
.cta-banner{background:var(--brand-600);border-radius:24px;padding:44px 28px;color:#fff;position:relative;overflow:hidden;}
.cta-banner::after{content:'';position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;background:rgba(255,255,255,.08);}
.cta-banner h2{color:#fff;}
.btn-invert{background:#fff;color:var(--brand-700);}
.btn-invert:hover{background:var(--brand-50);transform:translateY(-2px);}

/* 页脚 */
.site-footer{background:var(--ink-900);color:#CBD5E1;padding:64px 0 0;}
.site-footer h3{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px;letter-spacing:.02em;}
.footer-link{display:block;font-size:14px;color:#CBD5E1;padding:5px 0;transition:color .2s ease-out,transform .2s ease-out;}
.footer-link:hover{color:var(--teal-600);transform:translateX(2px);}
.footer-bottom{margin-top:48px;border-top:1px solid rgba(255,255,255,.12);padding:20px 0 28px;font-size:13px;color:#94A3B8;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;}
.footer-brand-mark{width:38px;height:38px;border-radius:11px;background:var(--brand-600);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;}

@media (max-width:767px){
  .plan-featured{transform:none;}
  .cta-banner{padding:32px 20px;border-radius:18px;}
  .card-body{padding:18px;}
}

/* roulang page: category1 */
:root{
    --brand-700:#1B37A0;
    --brand-600:#2549C8;
    --brand-500:#3D63E0;
    --brand-50:#EEF2FF;
    --brand-25:#F5F7FE;
    --teal-600:#0FA98F;
    --teal-50:#E7F7F3;
    --amber-500:#F97316;
    --ink-900:#0F172A;
    --ink-600:#475569;
    --ink-400:#94A3B8;
    --line:#E6ECF5;
    --bg:#F6F8FC;
    --surface:#FFFFFF;
    --surface-alt:#EEF3FB;
    --r-card:16px;
    --r-btn:10px;
    --r-img:12px;
    --r-pill:999px;
    --sh-card:0 1px 2px rgba(15,23,42,.04), 0 8px 24px rgba(37,73,200,.08);
    --sh-hover:0 14px 34px rgba(37,73,200,.16);
  }

  *{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink-600);
    font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4{
    color:var(--ink-900);
    margin:0;
    line-height:1.25;
    letter-spacing:-.01em;
    font-weight:700;
  }
  p{margin:0;}
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  button{font-family:inherit;}
  a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
    outline:2px solid var(--brand-600);
    outline-offset:2px;
    border-radius:6px;
  }

  .container-wide{width:100%;max-width:1280px;margin:0 auto;padding:0 20px;}
  .container-main{width:100%;max-width:1200px;margin:0 auto;padding:0 20px;}
  @media (min-width:1024px){
    .container-wide,.container-main{padding:0 32px;}
  }

  /* ============ 头部导航 ============ */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(255,255,255,.94);
    backdrop-filter:saturate(160%) blur(8px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease-out,background .2s ease-out;
  }
  .site-header.is-scrolled{box-shadow:0 6px 20px rgba(15,23,42,.06);}
  .nav-wrap{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    min-height:72px;
  }
  .brand{display:flex;align-items:center;gap:12px;flex-shrink:0;}
  .brand-mark{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:44px;height:44px;
    border-radius:12px;
    background:var(--brand-600);
    color:#fff;
    font-weight:700;
    font-size:15px;
    letter-spacing:.02em;
    box-shadow:0 6px 16px rgba(37,73,200,.28);
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.2;}
  .brand-text strong{font-size:16px;color:var(--ink-900);font-weight:700;}
  .brand-text span{font-size:12px;color:var(--ink-400);}
  @media (max-width:640px){
    .brand-text span{display:none;}
    .brand-text strong{font-size:14px;}
  }

  .nav-links{
    display:flex;
    align-items:center;
    gap:6px;
    overflow-x:auto;
    scrollbar-width:none;
  }
  .nav-links::-webkit-scrollbar{display:none;}
  .nav-link{
    position:relative;
    display:inline-flex;
    align-items:center;
    height:44px;
    padding:0 12px;
    font-size:14.5px;
    font-weight:500;
    color:var(--ink-600);
    border-radius:var(--r-btn);
    white-space:nowrap;
    transition:color .18s ease-out,background .18s ease-out;
  }
  .nav-link:hover{color:var(--brand-600);background:var(--brand-25);}
  .nav-link.active{color:var(--brand-600);font-weight:600;}
  .nav-link.active::after{
    content:"";
    position:absolute;
    left:12px;right:12px;bottom:6px;
    height:2px;
    border-radius:2px;
    background:var(--brand-600);
  }

  .mega{position:relative;}
  .mega-panel{
    position:absolute;
    top:calc(100% + 10px);
    right:0;
    width:700px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--sh-hover);
    padding:22px;
    opacity:0;
    visibility:hidden;
    transform:translateY(-4px);
    transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s;
  }
  .mega:hover .mega-panel,
  .mega:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0);}
  .mega-grid{display:grid;grid-template-columns:1.1fr 1.1fr 1fr;gap:22px;}
  .mega-title{
    font-size:12px;
    font-weight:600;
    letter-spacing:.08em;
    color:var(--ink-400);
    text-transform:uppercase;
    margin-bottom:12px;
  }
  .mega-pill{
    display:inline-block;
    padding:6px 12px;
    border-radius:var(--r-pill);
    background:var(--brand-50);
    color:var(--brand-700);
    font-size:13px;
    font-weight:500;
    transition:background .18s ease-out,color .18s ease-out;
  }
  .mega-pill:hover{background:var(--brand-600);color:#fff;}
  .mega-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px;}
  .mega-list li{display:flex;flex-direction:column;}
  .mega-list a{font-size:14px;color:var(--ink-900);font-weight:500;transition:color .18s ease-out;}
  .mega-list a:hover{color:var(--brand-600);}
  .mega-list time{font-size:12px;color:var(--ink-400);}
  .mega-card{
    background:var(--brand-25);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:16px;
  }
  .mega-card strong{display:block;font-size:15px;color:var(--ink-900);margin-bottom:8px;}
  .mega-card p{font-size:13px;color:var(--ink-600);line-height:1.7;margin-bottom:10px;}
  .mega-card a{font-size:13.5px;font-weight:600;color:var(--brand-600);}
  .mega-card a:hover{color:var(--brand-700);}
  @media (max-width:1023px){
    .mega-panel{display:none;}
    .nav-wrap{flex-direction:column;align-items:stretch;gap:0;padding:10px 0;}
    .brand{padding:8px 0;}
    .nav-links{
      border-top:1px solid var(--line);
      padding:6px 0 8px;
      gap:2px;
    }
    .nav-link{height:48px;}
    .nav-link.active::after{left:12px;right:auto;width:26px;bottom:8px;}
  }

  /* ============ 内页 Hero ============ */
  .page-hero{
    position:relative;
    background:linear-gradient(180deg,var(--brand-25) 0%,#FFFFFF 100%);
    border-bottom:1px solid var(--line);
    padding:44px 0 48px;
    overflow:hidden;
  }
  .page-hero::after{
    content:"";
    position:absolute;
    right:-80px;top:-60px;
    width:280px;height:280px;
    border-radius:50%;
    background:radial-gradient(circle,rgba(37,73,200,.10),rgba(37,73,200,0) 70%);
    pointer-events:none;
  }
  .breadcrumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13.5px;color:var(--ink-400);margin-bottom:18px;
  }
  .breadcrumb a{color:var(--ink-600);transition:color .18s ease-out;}
  .breadcrumb a:hover{color:var(--brand-600);}
  .breadcrumb .sep{color:var(--ink-400);}
  .hero-badge{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 14px;
    border-radius:var(--r-pill);
    background:var(--teal-50);
    color:var(--teal-600);
    font-size:13px;
    font-weight:600;
    margin-bottom:16px;
  }
  .page-hero h1{
    font-size:clamp(28px,4.4vw,46px);
    max-width:820px;
  }
  .page-hero .lede{
    margin-top:16px;
    font-size:16.5px;
    color:var(--ink-600);
    max-width:640px;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px;}
  .hero-meta{
    display:flex;flex-wrap:wrap;gap:20px 32px;
    margin-top:30px;
    padding-top:22px;
    border-top:1px solid var(--line);
  }
  .hero-meta div strong{display:block;font-size:20px;color:var(--brand-700);font-weight:700;line-height:1.3;}
  .hero-meta div span{font-size:13px;color:var(--ink-400);}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    min-height:46px;
    padding:0 22px;
    border-radius:var(--r-btn);
    font-size:15px;
    font-weight:600;
    border:1px solid transparent;
    cursor:pointer;
    transition:background .2s ease-out,color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
  }
  .btn-primary{background:var(--brand-600);color:#fff;box-shadow:0 8px 20px rgba(37,73,200,.24);}
  .btn-primary:hover{background:var(--brand-700);transform:translateY(-2px);box-shadow:0 12px 26px rgba(37,73,200,.3);}
  .btn-outline{background:#fff;color:var(--brand-600);border-color:var(--line);}
  .btn-outline:hover{background:var(--brand-25);border-color:rgba(37,73,200,.3);}
  .btn-ghost{background:transparent;color:var(--brand-600);padding:0 6px;min-height:44px;}
  .btn-ghost .arrow{transition:transform .2s ease-out;}
  .btn-ghost:hover .arrow{transform:translateX(4px);}
  .btn-light{background:#fff;color:var(--brand-700);}
  .btn-light:hover{background:var(--brand-50);transform:translateY(-2px);}

  /* ============ 板块 ============ */
  .section{padding:64px 0;}
  @media (min-width:1024px){.section{padding:96px 0;}}
  .section-alt{background:var(--surface-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
  .section-head{max-width:760px;margin-bottom:32px;}
  .section-head .eyebrow{
    display:inline-block;
    font-size:12.5px;font-weight:600;letter-spacing:.1em;
    color:var(--teal-600);
    background:var(--teal-50);
    padding:5px 12px;border-radius:var(--r-pill);
    margin-bottom:14px;
  }
  .section-head h2{font-size:clamp(24px,3vw,34px);}
  .section-head p{margin-top:12px;font-size:16px;color:var(--ink-600);}

  .card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--sh-card);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .card-hover:hover{
    transform:translateY(-4px);
    box-shadow:var(--sh-hover);
    border-color:rgba(37,73,200,.28);
  }
  .card-hover:hover h3{color:var(--brand-600);}

  .figure{
    border-radius:var(--r-img);
    overflow:hidden;
    background:var(--surface-alt);
    border:1px solid var(--line);
  }
  .figure img{width:100%;height:100%;object-fit:cover;}
  .figure-4x3{aspect-ratio:4/3;}
  .figure-16x9{aspect-ratio:16/9;}

  .point-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:14px;}
  .point-item{
    display:flex;gap:14px;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:16px 18px;
    box-shadow:var(--sh-card);
    transition:border-color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out;
  }
  .point-item:hover{border-color:rgba(37,73,200,.28);transform:translateY(-2px);box-shadow:var(--sh-hover);}
  .point-index{
    flex:0 0 34px;
    width:34px;height:34px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:10px;
    background:var(--brand-50);
    color:var(--brand-700);
    font-size:14px;font-weight:700;
  }
  .point-item h3{font-size:16.5px;margin-bottom:4px;}
  .point-item p{font-size:14.5px;color:var(--ink-600);}

  .step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
  .step-card{
    position:relative;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:24px 20px 22px;
    box-shadow:var(--sh-card);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .step-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(37,73,200,.28);}
  .step-card .step-num{
    display:inline-block;
    font-size:13px;font-weight:700;letter-spacing:.1em;
    color:var(--brand-600);
    background:var(--brand-50);
    border-radius:var(--r-pill);
    padding:4px 12px;
    margin-bottom:14px;
  }
  .step-card h3{font-size:17.5px;margin-bottom:8px;}
  .step-card p{font-size:14.5px;color:var(--ink-600);}
  .step-card::after{
    content:"";
    position:absolute;left:20px;bottom:0;width:38px;height:3px;border-radius:3px;
    background:var(--teal-600);opacity:.85;
  }
  @media (max-width:1023px){.step-grid{grid-template-columns:repeat(2,1fr);}}
  @media (max-width:560px){.step-grid{grid-template-columns:1fr;}}

  .scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
  .scene-card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:22px;
    box-shadow:var(--sh-card);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .scene-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:rgba(37,73,200,.28);}
  .scene-card .tag{
    display:inline-block;
    font-size:12px;font-weight:600;
    color:var(--teal-600);
    background:var(--teal-50);
    padding:4px 10px;border-radius:var(--r-pill);
    margin-bottom:12px;
  }
  .scene-card h3{font-size:17px;margin-bottom:8px;}
  .scene-card p{font-size:14.5px;color:var(--ink-600);}
  @media (max-width:640px){.scene-grid{grid-template-columns:1fr;}}

  .stat-row{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:18px;
  }
  .stat-item{
    background:var(--surface);
    border:1px solid var(--line);
    border-left:4px solid var(--brand-500);
    border-radius:var(--r-card);
    padding:20px 22px;
    box-shadow:var(--sh-card);
  }
  .stat-item strong{display:block;font-size:26px;color:var(--brand-700);line-height:1.2;}
  .stat-item span{display:block;font-size:14px;color:var(--ink-600);margin-top:6px;}
  @media (max-width:768px){.stat-row{grid-template-columns:1fr;}}

  .note-card{
    background:#FFF7ED;
    border:1px solid #FED7AA;
    border-left:4px solid var(--amber-500);
    border-radius:var(--r-card);
    padding:18px 20px;
  }
  .note-card strong{display:block;color:#9A3412;font-size:15.5px;margin-bottom:6px;}
  .note-card p{font-size:14.5px;color:#7C2D12;}

  /* ============ FAQ ============ */
  .faq-list{display:flex;flex-direction:column;gap:12px;}
  .faq-item{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--sh-card);
    padding:0 20px;
    transition:background .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
  }
  .faq-item summary{
    list-style:none;
    cursor:pointer;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    min-height:60px;
    padding:16px 0;
    font-size:17px;
    font-weight:600;
    color:var(--ink-900);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary .plus{
    flex:0 0 26px;width:26px;height:26px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:50%;
    background:var(--brand-50);
    color:var(--brand-600);
    font-size:17px;font-weight:600;line-height:1;
    transition:transform .2s ease-out,background .2s ease-out,color .2s ease-out;
  }
  .faq-item[open]{
    background:var(--brand-25);
    border-color:rgba(37,73,200,.28);
    box-shadow:0 8px 22px rgba(37,73,200,.1);
    border-left:4px solid var(--brand-600);
  }
  .faq-item[open] summary .plus{transform:rotate(45deg);background:var(--brand-600);color:#fff;}
  .faq-item .faq-body{
    padding:0 0 20px;
    font-size:15px;
    color:var(--ink-600);
    line-height:1.8;
    border-top:1px dashed var(--line);
    padding-top:14px;
  }

  /* ============ CTA 横幅 ============ */
  .cta-band{
    background:var(--brand-600);
    border-radius:20px;
    padding:40px 32px;
    display:grid;
    grid-template-columns:1.4fr 1fr;
    gap:28px;
    align-items:center;
    color:#fff;
    box-shadow:0 18px 40px rgba(37,73,200,.26);
  }
  .cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);}
  .cta-band p{color:rgba(255,255,255,.86);font-size:15.5px;margin-top:12px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end;}
  @media (max-width:900px){
    .cta-band{grid-template-columns:1fr;padding:30px 22px;}
    .cta-actions{justify-content:flex-start;}
  }

  /* ============ 相关分类卡 ============ */
  .cat-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px;}
  .cat-card{
    display:block;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:22px;
    box-shadow:var(--sh-card);
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .cat-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(37,73,200,.28);}
  .cat-card:hover h3{color:var(--brand-600);}
  .cat-card .cat-icon{
    width:42px;height:42px;border-radius:12px;
    display:inline-flex;align-items:center;justify-content:center;
    background:var(--brand-50);color:var(--brand-700);
    font-weight:700;font-size:15px;margin-bottom:14px;
  }
  .cat-card h3{font-size:17px;margin-bottom:8px;transition:color .2s ease-out;}
  .cat-card p{font-size:14.5px;color:var(--ink-600);}
  .cat-card .go{display:inline-flex;align-items:center;gap:6px;margin-top:14px;font-size:14px;font-weight:600;color:var(--brand-600);}
  @media (max-width:900px){.cat-grid{grid-template-columns:1fr;}}

  /* ============ 页脚 ============ */
  .site-footer{
    background:var(--ink-900);
    color:#CBD5E1;
    padding:56px 0 0;
    margin-top:0;
  }
  .site-footer h3{
    color:#fff;
    font-size:15px;
    font-weight:600;
    margin-bottom:16px;
    letter-spacing:.02em;
  }
  .footer-brand-mark{
    display:inline-flex;align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:12px;
    background:var(--brand-600);color:#fff;font-weight:700;font-size:15px;
  }
  .footer-link{
    display:block;
    padding:5px 0;
    font-size:14px;
    color:#CBD5E1;
    transition:color .2s ease-out,transform .2s ease-out;
  }
  .footer-link:hover{color:var(--teal-600);transform:translateX(2px);}
  .footer-bottom{
    margin-top:40px;
    padding:20px 0 26px;
    border-top:1px solid rgba(148,163,184,.22);
    display:flex;
    flex-wrap:wrap;
    gap:14px 28px;
    align-items:center;
    justify-content:space-between;
    font-size:13.5px;
    color:#94A3B8;
  }
  .tick{font-size:13px;line-height:1.6;}

/* roulang page: article */
:root{
  --brand-700:#1B37A0;
  --brand-600:#2549C8;
  --brand-500:#3D63E0;
  --brand-50:#EEF2FF;
  --brand-25:#F5F7FE;
  --teal-600:#0FA98F;
  --teal-50:#E7F7F3;
  --amber-500:#F97316;
  --ink-900:#0F172A;
  --ink-600:#475569;
  --ink-400:#94A3B8;
  --line:#E6ECF5;
  --bg:#F6F8FC;
  --surface:#FFFFFF;
  --surface-alt:#EEF3FB;
  --r-card:16px;
  --r-btn:10px;
  --r-img:12px;
  --r-pill:999px;
  --sh-card:0 1px 2px rgba(15,23,42,.04), 0 8px 24px rgba(37,73,200,.08);
  --sh-hover:0 14px 34px rgba(37,73,200,.16);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  background:var(--bg);
  color:var(--ink-600);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.28;letter-spacing:-.01em;font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0}
:focus-visible{outline:2px solid var(--brand-600);outline-offset:2px;border-radius:6px}

.container-wide{max-width:1280px;margin:0 auto;padding:0 20px}
.container-main{max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:1024px){
  .container-wide{padding:0 32px}
  .container-main{padding:0 32px}
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:90;
  background:#fff;
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 2px rgba(15,23,42,.03);
}
.nav-wrap{position:relative;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:72px}
.brand{display:flex;align-items:center;gap:12px;min-height:44px;flex:0 0 auto}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;
  background:var(--brand-600);color:#fff;
  font-size:15px;font-weight:700;letter-spacing:.5px;
  box-shadow:0 6px 16px rgba(37,73,200,.28);
}
.brand-text{display:flex;flex-direction:column}
.brand-text strong{font-size:16px;font-weight:700;color:var(--ink-900);line-height:1.3;white-space:nowrap}
.brand-text span{font-size:12px;color:var(--ink-400);line-height:1.3;white-space:nowrap}
@media (max-width:420px){
  .brand-text strong{font-size:14px;white-space:normal}
  .brand-text span{display:none}
}

.nav-toggle{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}
.nav-burger{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0 11px;flex:0 0 auto;
  border:1px solid var(--line);border-radius:var(--r-btn);background:#fff;cursor:pointer;
  transition:border-color .2s ease-out,box-shadow .2s ease-out;
}
.nav-burger:hover{border-color:rgba(37,73,200,.4);box-shadow:var(--sh-card)}
.nav-burger span{display:block;height:2px;border-radius:2px;background:var(--ink-900)}

.nav-links{display:none}
.nav-toggle:checked ~ .nav-links{display:flex}

@media (max-width:1023px){
  .nav-links{
    position:absolute;top:calc(100% + 1px);left:-20px;right:-20px;
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--line);
    box-shadow:0 18px 40px rgba(15,23,42,.14);
    padding:6px 20px 18px;max-height:72vh;overflow-y:auto;z-index:95;
  }
  .nav-links .nav-link{
    display:flex;align-items:center;min-height:48px;padding:0;
    font-size:15px;border-bottom:1px solid var(--line);border-radius:0;
  }
  .nav-links .nav-link.active::after{left:0;right:auto;width:22px;bottom:12px}
  .mega-panel{display:none}
}

@media (min-width:1024px){
  .nav-burger{display:none}
  .nav-links{display:flex;align-items:center;gap:2px;position:static;background:none;box-shadow:none;padding:0;border:0;max-height:none;overflow:visible}
}

.nav-link{
  position:relative;display:inline-flex;align-items:center;
  min-height:44px;padding:0 14px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;color:var(--ink-600);
  transition:color .2s ease-out,background-color .2s ease-out;
}
.nav-link:hover{color:var(--brand-600);background:var(--brand-25)}
.nav-link.active{color:var(--brand-600);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;
  border-radius:2px;background:var(--brand-600);
}

/* Mega 面板 */
.mega{position:relative}
.mega-panel{
  position:absolute;top:calc(100% + 10px);left:50%;
  transform:translateX(-50%) translateY(4px);
  width:700px;max-width:min(700px,calc(100vw - 48px));
  background:#fff;border:1px solid var(--line);border-radius:16px;
  box-shadow:var(--sh-hover);padding:24px;
  opacity:0;visibility:hidden;pointer-events:none;z-index:99;
  transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s ease-out;
}
.mega:hover .mega-panel,.mega:focus-within .mega-panel{
  opacity:1;visibility:visible;pointer-events:auto;
  transform:translateX(-50%) translateY(0);
}
.mega-grid{display:grid;grid-template-columns:1.05fr 1.15fr .95fr;gap:22px}
.mega-title{
  font-size:12px;font-weight:700;letter-spacing:.1em;
  color:var(--ink-400);margin-bottom:12px;text-transform:uppercase;
}
.mega-pill{
  display:inline-flex;align-items:center;min-height:34px;padding:0 12px;
  border-radius:var(--r-pill);background:var(--brand-50);color:var(--brand-700);
  font-size:13px;font-weight:500;transition:background-color .18s ease-out,color .18s ease-out;
}
.mega-pill:hover{background:var(--brand-600);color:#fff}
.mega-list{list-style:none;margin:0;padding:0}
.mega-list li{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px;
}
.mega-list li:last-child{border-bottom:0}
.mega-list a{color:var(--ink-600);transition:color .18s ease-out}
.mega-list a:hover{color:var(--brand-600)}
.mega-list time{color:var(--ink-400);font-size:12px;white-space:nowrap}
.mega-card{
  background:var(--brand-25);border:1px solid #DCE4FA;border-radius:12px;
  padding:16px;font-size:13px;line-height:1.7;color:var(--ink-600);
}
.mega-card strong{display:block;color:var(--ink-900);font-size:14px;margin-bottom:6px}
.mega-card ol{margin:8px 0 0;padding-left:18px;list-style:decimal;font-size:13px}
.mega-card ol li{margin-bottom:4px}

/* ============ 面包屑 & 标题带 ============ */
.article-hero{
  background:linear-gradient(180deg,var(--surface-alt) 0%,var(--brand-25) 60%,var(--bg) 100%);
  border-bottom:1px solid var(--line);
  padding:34px 0 46px;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink-400);margin-bottom:22px}
.breadcrumb a{color:var(--ink-400);transition:color .18s ease-out}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb .sep{color:#C3CFE4}
.breadcrumb .current{color:var(--ink-600);font-weight:500}
.cat-pill{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:var(--r-pill);
  background:var(--teal-50);color:var(--teal-600);
  font-size:13px;font-weight:600;margin-bottom:16px;
}
.article-hero h1{
  font-size:clamp(26px,4vw,44px);
  max-width:940px;
  overflow-wrap:break-word;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px 22px;
  margin-top:20px;font-size:14px;color:var(--ink-400);
}
.meta-row .meta-item{display:inline-flex;align-items:center;gap:6px}
.meta-row .meta-item strong{color:var(--ink-600);font-weight:500}
.meta-row svg{flex:0 0 auto;color:#AEBBD0}

/* ============ 正文 ============ */
.article-main{padding:52px 0 76px;background:var(--bg)}
.article-body{
  max-width:760px;margin:0 auto;
  background:var(--surface);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);
  padding:44px 46px;
  font-size:17px;line-height:1.85;color:var(--ink-600);
  overflow-wrap:break-word;
}
@media (max-width:768px){
  .article-main{padding:34px 0 56px}
  .article-body{padding:30px 22px;font-size:16.5px;line-height:1.8;border-radius:14px}
}
.article-body > *:first-child{margin-top:0}
.article-body h2{
  position:relative;font-size:24px;font-weight:700;
  margin:40px 0 16px;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.22em;bottom:.22em;width:4px;
  border-radius:2px;background:var(--brand-600);
}
.article-body h3{font-size:19px;font-weight:600;margin:28px 0 12px}
.article-body h4{font-size:17px;font-weight:600;margin:22px 0 10px}
.article-body p{margin:0 0 1.15em}
.article-body a{color:var(--brand-600);border-bottom:1px solid rgba(37,73,200,.3);transition:border-color .18s ease-out}
.article-body a:hover{border-bottom-color:var(--brand-600)}
.article-body strong{color:var(--ink-900);font-weight:600}
.article-body ul,.article-body ol{margin:0 0 1.25em;padding-left:0;list-style:none}
.article-body li{position:relative;padding-left:26px;margin-bottom:.6em}
.article-body ul > li::before{
  content:"";position:absolute;left:7px;top:.7em;
  width:7px;height:7px;border-radius:50%;background:var(--brand-500);
}
.article-body ol{counter-reset:olcount}
.article-body ol > li{counter-increment:olcount;padding-left:32px}
.article-body ol > li::before{
  content:counter(olcount);
  position:absolute;left:0;top:.32em;
  display:flex;align-items:center;justify-content:center;
  width:21px;height:21px;border-radius:50%;
  background:var(--brand-50);color:var(--brand-700);
  font-size:12px;font-weight:700;line-height:1;
}
.article-body img{border-radius:var(--r-img);margin:24px auto;box-shadow:var(--sh-card)}
.article-body blockquote{
  margin:24px 0;padding:16px 22px;
  background:var(--brand-25);border-left:4px solid var(--brand-600);
  border-radius:0 12px 12px 0;color:var(--ink-600);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body th{
  background:var(--brand-50);color:var(--ink-900);font-weight:600;
  text-align:left;padding:12px 14px;border:1px solid var(--line);
}
.article-body td{padding:11px 14px;border:1px solid var(--line);background:#fff}
.article-body tbody tr:nth-child(even) td{background:var(--brand-25)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}
.article-body code{
  background:var(--brand-50);color:var(--brand-700);
  padding:2px 6px;border-radius:6px;font-size:14px;
}
.article-body .table-scroll{overflow-x:auto;margin:24px 0}

.empty-state{
  text-align:center;padding:56px 20px;
  border:2px dashed var(--line);border-radius:var(--r-card);
  background:var(--surface);
}
.empty-state .empty-icon{
  width:56px;height:56px;margin:0 auto 18px;border-radius:16px;
  display:flex;align-items:center;justify-content:center;
  background:var(--brand-50);color:var(--brand-600);
}
.empty-state h2{font-size:20px;margin-bottom:10px;padding-left:0}
.empty-state h2::before{display:none}
.empty-state p{font-size:14.5px;color:var(--ink-400);margin-bottom:22px}

/* ============ 文末 ============ */
.article-foot{max-width:760px;margin:26px auto 0}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:26px}
.tag-row .tag-label{font-size:13px;color:var(--ink-400);margin-right:2px}
.tag{
  display:inline-flex;align-items:center;min-height:32px;padding:0 14px;
  border-radius:var(--r-pill);background:var(--brand-50);color:var(--brand-700);
  font-size:13px;font-weight:500;
  transition:background-color .18s ease-out,color .18s ease-out,transform .18s ease-out;
}
.tag:hover{background:var(--brand-600);color:#fff;transform:translateY(-2px)}

.prevnext{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:640px){.prevnext{grid-template-columns:1fr}}
.pn-card{
  display:flex;flex-direction:column;gap:6px;
  padding:20px 22px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.pn-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(37,73,200,.28)}
.pn-card .pn-label{font-size:12px;font-weight:700;letter-spacing:.06em;color:var(--teal-600)}
.pn-card .pn-title{font-size:16px;font-weight:600;color:var(--ink-900);line-height:1.5}
.pn-card:hover .pn-title{color:var(--brand-600)}
.pn-card .pn-desc{font-size:13.5px;color:var(--ink-400)}

/* ============ 通用板块 ============ */
.section{padding:72px 0}
@media (max-width:768px){.section{padding:52px 0}}
.section-alt{background:var(--surface-alt)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:34px}
.section-head h2{font-size:clamp(22px,3vw,32px)}
.section-head p{margin-top:10px;font-size:15px;color:var(--ink-400);max-width:640px}
.text-link{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14.5px;font-weight:600;color:var(--brand-600);min-height:44px;
}
.text-link svg{transition:transform .2s ease-out}
.text-link:hover svg{transform:translateX(4px)}

.card-grid{display:grid;grid-template-columns:1fr;gap:24px}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}

.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);
  transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(37,73,200,.28)}
.card-media{aspect-ratio:4/3;overflow:hidden;background:var(--surface-alt)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease-out}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.badge{
  display:inline-flex;align-items:center;align-self:flex-start;
  padding:4px 11px;border-radius:var(--r-pill);
  background:var(--teal-50);color:var(--teal-600);
  font-size:12px;font-weight:600;
}
.card-title{
  font-size:18px;font-weight:600;color:var(--ink-900);
  line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;
  -webkit-box-orient:vertical;overflow:hidden;
  transition:color .2s ease-out;
}
.card:hover .card-title{color:var(--brand-600)}
.card-desc{
  font-size:14px;color:var(--ink-600);line-height:1.72;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{
  margin-top:auto;padding-top:6px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--ink-400);
}
.read-link{display:inline-flex;align-items:center;gap:4px;color:var(--brand-600);font-weight:600;font-size:13px}
.read-link svg{transition:transform .2s ease-out}
.card:hover .read-link svg{transform:translateX(4px)}

/* ============ CTA ============ */
.cta-band{background:var(--brand-600);padding:56px 0}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px}
.cta-band h2{color:#fff;font-size:clamp(22px,3vw,30px)}
.cta-band p{color:rgba(255,255,255,.84);font-size:15px;margin-top:10px;max-width:600px;line-height:1.75}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:48px;padding:0 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:background-color .2s ease-out,color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.btn-white{background:#fff;color:var(--brand-700)}
.btn-white:hover{background:var(--brand-50);transform:translateY(-2px);box-shadow:0 12px 28px rgba(15,23,42,.22)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-2px)}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-2px);box-shadow:0 12px 26px rgba(37,73,200,.32)}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:#CBD5E1;padding:58px 0 0}
.site-footer h3{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;flex:0 0 auto;
  background:var(--brand-600);color:#fff;font-size:15px;font-weight:700;letter-spacing:.5px;
}
.footer-link{
  display:block;padding:6px 0;font-size:14px;color:#CBD5E1;
  transition:color .18s ease-out,transform .18s ease-out;
}
.footer-link:hover{color:var(--teal-600);transform:translateX(2px)}
.footer-bottom{
  margin-top:44px;padding:20px 0;
  border-top:1px solid rgba(255,255,255,.1);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  font-size:13px;color:#94A3B8;
}
.tick{font-weight:700}

/* roulang page: category2 */
:root{
    --brand-700:#1B37A0; --brand-600:#2549C8; --brand-500:#3D63E0;
    --brand-50:#EEF2FF; --brand-25:#F5F7FE;
    --teal-600:#0FA98F; --teal-50:#E7F7F3;
    --amber-500:#F97316;
    --ink-900:#0F172A; --ink-600:#475569; --ink-400:#94A3B8;
    --line:#E6ECF5; --bg:#F6F8FC; --surface:#FFFFFF; --surface-alt:#EEF3FB;
    --r-card:16px; --r-btn:10px; --r-img:12px; --r-pill:999px;
    --sh-card:0 1px 2px rgba(15,23,42,.04), 0 8px 24px rgba(37,73,200,.08);
    --sh-hover:0 14px 34px rgba(37,73,200,.16);
    --nav-h:72px;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;background:var(--bg);color:var(--ink-600);
    font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button,input,textarea,select{font:inherit}
  ul{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4{margin:0;color:var(--ink-900);font-weight:700;letter-spacing:-.01em;line-height:1.25}
  p{margin:0}

  :focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:6px}

  /* ============ 容器 ============ */
  .container-wide{max-width:1280px;margin:0 auto;padding:0 20px}
  .container-main{max-width:1200px;margin:0 auto;padding:0 20px}
  @media (min-width:1024px){
    .container-wide{padding:0 32px}
    .container-main{padding:0 32px}
  }

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;top:0;z-index:70;
    background:rgba(255,255,255,.96);
    border-bottom:1px solid var(--line);
    transition:box-shadow .2s ease-out;
  }
  .site-header:hover{box-shadow:0 6px 20px rgba(15,23,42,.05)}
  .nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:var(--nav-h)}

  .brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
  .brand-mark{
    width:44px;height:44px;border-radius:12px;background:var(--brand-600);color:#fff;
    display:grid;place-items:center;font-size:15px;font-weight:700;letter-spacing:.5px;
  }
  .brand-text strong{display:block;font-size:16px;color:var(--ink-900);font-weight:700;line-height:1.2}
  .brand-text span{display:block;font-size:12px;color:var(--ink-400);line-height:1.4;margin-top:2px}

  .nav-toggle-input{position:absolute;opacity:0;width:1px;height:1px;pointer-events:none}
  .nav-burger{
    display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
    align-items:center;justify-content:center;cursor:pointer;background:#fff;color:var(--ink-900);flex:0 0 auto;
  }
  .nav-burger:hover{border-color:rgba(37,73,200,.28);color:var(--brand-600)}

  .nav-links{display:flex;align-items:center;gap:4px}
  .nav-link{
    position:relative;display:inline-flex;align-items:center;min-height:44px;
    padding:0 14px;font-size:15px;color:var(--ink-600);border-radius:8px;
    transition:color .2s ease-out,background .2s ease-out;white-space:nowrap;cursor:pointer;
  }
  .nav-link:hover{color:var(--brand-600);background:var(--brand-25)}
  .nav-link.active{color:var(--brand-600);font-weight:600}
  .nav-link.active::after{
    content:"";position:absolute;left:14px;right:14px;bottom:8px;height:2px;
    background:var(--brand-600);border-radius:2px;
  }

  .mega{position:relative}
  .mega-panel{
    position:absolute;top:calc(100% + 12px);right:0;width:700px;
    background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--sh-hover);
    padding:22px;opacity:0;visibility:hidden;transform:translateY(4px);
    transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s;
  }
  .mega:hover .mega-panel,.mega:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
  .mega-grid{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:22px}
  .mega-title{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--ink-400);margin-bottom:10px}
  .mega-pill{
    display:inline-flex;align-items:center;padding:7px 13px;border-radius:var(--r-pill);
    background:var(--brand-50);color:var(--brand-700);font-size:13px;font-weight:500;
    margin:0 6px 8px 0;transition:background .2s ease-out,color .2s ease-out;
  }
  .mega-pill:hover{background:var(--brand-600);color:#fff}
  .mega-list li{display:flex;flex-direction:column;gap:2px;padding:9px 0;border-bottom:1px dashed var(--line)}
  .mega-list li:last-child{border-bottom:0}
  .mega-list a{font-size:14px;color:var(--ink-900);font-weight:500;transition:color .2s ease-out}
  .mega-list a:hover{color:var(--brand-600)}
  .mega-list time{font-size:12px;color:var(--ink-400)}
  .mega-card{background:var(--brand-25);border:1px solid var(--line);border-radius:12px;padding:15px}
  .mega-card strong{display:block;font-size:14px;color:var(--ink-900);font-weight:600}
  .mega-card span{display:block;font-size:13px;color:var(--ink-600);margin:6px 0 10px;line-height:1.6}
  .mega-card a{font-size:13px;font-weight:600;color:var(--brand-600);transition:color .2s ease-out}
  .mega-card a:hover{color:var(--brand-700);text-decoration:underline}

  @media (max-width:1023px){
    .nav-burger{display:flex}
    .nav-links{
      position:absolute;left:0;right:0;top:100%;flex-direction:column;align-items:stretch;
      background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--sh-card);
      padding:6px 20px 20px;display:none;
    }
    .nav-toggle-input:checked ~ .nav-links{display:flex}
    .nav-link{height:48px;padding:0 6px;border-bottom:1px solid var(--line);border-radius:0;justify-content:flex-start}
    .nav-link.active::after{display:none}
    .nav-link.active{background:var(--brand-25)}
    .mega{position:static}
    .mega-panel{
      position:static;width:auto;opacity:1;visibility:visible;transform:none;
      border:0;box-shadow:none;padding:10px 0 16px;display:block;
    }
    .mega-grid{grid-template-columns:1fr;gap:18px}
  }

  /* ============ 通用按钮 / 标签 ============ */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:0 22px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;border:1px solid transparent;
    transition:background .2s ease-out,color .2s ease-out,box-shadow .2s ease-out,transform .2s ease-out,border-color .2s ease-out;
  }
  .btn-primary{background:var(--brand-600);color:#fff}
  .btn-primary:hover{background:var(--brand-700);transform:translateY(-1px);box-shadow:var(--sh-hover)}
  .btn-primary:active{transform:translateY(0)}
  .btn-ghost{background:#fff;color:var(--brand-600);border-color:var(--line)}
  .btn-ghost:hover{background:var(--brand-25);border-color:rgba(37,73,200,.28)}
  .btn-light{background:#fff;color:var(--brand-700);border-color:#fff}
  .btn-light:hover{background:var(--brand-50);transform:translateY(-1px)}
  .btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
  .btn-outline-light:hover{background:rgba(255,255,255,.12);border-color:#fff}
  .btn-text{
    display:inline-flex;align-items:center;gap:6px;color:var(--brand-600);
    font-size:15px;font-weight:600;min-height:44px;transition:color .2s ease-out;
  }
  .btn-text svg{transition:transform .2s ease-out}
  .btn-text:hover{color:var(--brand-700)}
  .btn-text:hover svg{transform:translateX(4px)}

  .pill{
    display:inline-flex;align-items:center;gap:6px;padding:6px 13px;border-radius:var(--r-pill);
    background:var(--teal-50);color:var(--teal-600);font-size:13px;font-weight:600;
  }
  .pill-brand{background:var(--brand-50);color:var(--brand-700)}

  /* ============ 面包屑 ============ */
  .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink-400);margin:0 0 18px}
  .breadcrumb a{color:var(--ink-600);transition:color .2s ease-out}
  .breadcrumb a:hover{color:var(--brand-600)}
  .breadcrumb .sep{color:var(--ink-400)}

  /* ============ 内页 Hero ============ */
  .page-hero{padding:26px 0 0}
  .hero-card{
    position:relative;border-radius:20px;overflow:hidden;box-shadow:var(--sh-card);
    min-height:clamp(340px,50vw,530px);display:flex;align-items:flex-end;padding:24px;isolation:isolate;
  }
  .hero-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2}
  .hero-veil{
    position:absolute;inset:0;z-index:-1;
    background:linear-gradient(180deg,rgba(15,23,42,.18) 0%,rgba(15,23,42,.62) 100%);
  }
  .hero-strip{
    position:relative;background:#fff;border-radius:14px;padding:26px 28px;
    box-shadow:0 12px 32px rgba(15,23,42,.16);max-width:760px;
  }
  .hero-title{font-size:clamp(26px,3.4vw,40px);margin:14px 0 12px}
  .hero-lead{font-size:16px;color:var(--ink-600);max-width:44em}
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}

  /* ============ 数字指标行 ============ */
  .stat-row{
    display:grid;grid-template-columns:repeat(4,1fr);background:#fff;
    border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
    margin-top:20px;box-shadow:var(--sh-card);
  }
  .stat{padding:22px 24px;border-right:1px solid var(--line)}
  .stat:last-child{border-right:0}
  .stat-num{font-size:26px;font-weight:700;color:var(--brand-600);line-height:1.15;letter-spacing:-.01em}
  .stat-label{font-size:14px;color:var(--ink-600);margin-top:6px;line-height:1.55}

  /* ============ 板块 ============ */
  .section{padding:64px 0}
  .section-alt{background:var(--surface-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  @media (min-width:1024px){ .section{padding:92px 0} }

  .sec-head{max-width:760px;margin-bottom:32px}
  .sec-title{font-size:clamp(23px,2.5vw,34px);margin:14px 0 12px}
  .sec-sub{font-size:16px;color:var(--ink-600)}

  /* ============ 图文交替 ============ */
  .split-row{display:grid;gap:36px;align-items:center;grid-template-columns:1fr}
  @media (min-width:960px){
    .split-row{grid-template-columns:1.05fr .95fr;gap:52px}
    .split-row.is-reverse .split-media{order:-1}
  }
  .split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-img);box-shadow:var(--sh-card)}

  .point-list{margin-top:8px}
  .point-list li{
    display:flex;gap:14px;padding:15px 0;border-bottom:1px dashed var(--line);
  }
  .point-list li:last-child{border-bottom:0}
  .point-idx{
    flex:0 0 30px;width:30px;height:30px;border-radius:9px;background:var(--brand-50);
    color:var(--brand-700);display:grid;place-items:center;font-size:13px;font-weight:700;
  }
  .point-body strong{display:block;font-size:16px;color:var(--ink-900);font-weight:600;margin-bottom:3px}
  .point-body span{font-size:14.5px;color:var(--ink-600);line-height:1.7}

  .step-flow{display:grid;gap:14px;margin-top:24px}
  .step-item{
    display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    padding:18px 20px;box-shadow:var(--sh-card);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .step-item:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(37,73,200,.28)}
  .step-num{
    flex:0 0 44px;width:44px;height:44px;border-radius:12px;background:var(--brand-600);color:#fff;
    display:grid;place-items:center;font-size:17px;font-weight:700;
  }
  .step-item h3{font-size:17px;margin-bottom:4px}
  .step-item p{font-size:14.5px;color:var(--ink-600)}

  .note-card{
    margin-top:24px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--amber-500);
    border-radius:12px;padding:18px 20px;
  }
  .note-card strong{display:block;color:var(--ink-900);font-size:15px;font-weight:600;margin-bottom:6px}
  .note-card p{font-size:14.5px;color:var(--ink-600)}

  /* ============ 卡片 ============ */
  .card{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
    box-shadow:var(--sh-card);overflow:hidden;
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
    display:flex;flex-direction:column;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(37,73,200,.28)}
  .card:hover .card-title{color:var(--brand-600)}
  .card-title{font-size:19px;margin-bottom:8px;transition:color .2s ease-out;color:var(--ink-900)}
  .card-body{padding:20px 22px 22px}
  .card-text{font-size:14.5px;color:var(--ink-600);line-height:1.75}
  .card-img{width:100%;aspect-ratio:16/9;object-fit:cover}

  .risk-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:20px}
  .risk-main{grid-column:span 12}
  .risk-side{grid-column:span 12;display:grid;gap:20px}
  @media (min-width:960px){
    .risk-main{grid-column:span 7}
    .risk-side{grid-column:span 5}
  }
  .side-card{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:18px;box-shadow:var(--sh-card);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out}
  .side-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(37,73,200,.28)}
  .side-card img{width:88px;height:88px;border-radius:10px;object-fit:cover;flex:0 0 88px}
  .side-card h3{font-size:16.5px;margin-bottom:6px}
  .side-card p{font-size:14px;color:var(--ink-600)}

  /* ============ 安全清单 ============ */
  .check-wrap{
    background:var(--teal-50);border:1px solid rgba(15,169,143,.2);
    border-radius:20px;padding:30px;
  }
  .check-grid{display:grid;gap:16px;grid-template-columns:1fr}
  @media (min-width:700px){ .check-grid{grid-template-columns:repeat(2,1fr)} }
  .check-item{background:#fff;border-radius:14px;padding:18px 20px;border:1px solid rgba(15,169,143,.16)}
  .check-item strong{display:flex;align-items:center;gap:8px;font-size:16px;color:var(--ink-900);font-weight:600;margin-bottom:6px}
  .check-item strong .tick{color:var(--teal-600);font-weight:700}
  .check-item p{font-size:14.5px;color:var(--ink-600)}

  /* ============ FAQ ============ */
  .faq details{
    background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:12px;
    overflow:hidden;transition:background .2s ease-out,border-color .2s ease-out;
  }
  .faq details[open]{background:var(--brand-25);border-color:rgba(37,73,200,.3)}
  .faq summary{
    position:relative;display:flex;align-items:center;min-height:56px;
    padding:16px 56px 16px 20px;font-size:17px;font-weight:600;color:var(--ink-900);
    cursor:pointer;list-style:none;
  }
  .faq summary::-webkit-details-marker{display:none}
  .faq summary::after{
    content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
    font-size:22px;font-weight:400;color:var(--brand-600);transition:transform .2s ease-out;
  }
  .faq details[open] summary::after{transform:translateY(-50%) rotate(45deg)}
  .faq details[open] summary::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--brand-600)}
  .faq-body{padding:0 22px 20px;font-size:15px;line-height:1.8;color:var(--ink-600)}

  /* ============ CTA ============ */
  .cta-band{
    background:var(--brand-600);border-radius:20px;padding:38px 40px;color:#fff;
    display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between;
  }
  .cta-band h2{color:#fff;font-size:clamp(21px,2.2vw,28px);margin-bottom:8px}
  .cta-band p{color:rgba(255,255,255,.86);font-size:15px;max-width:52em}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}

  /* ============ 相关分类 ============ */
  .related-grid{display:grid;gap:22px;grid-template-columns:1fr}
  @media (min-width:720px){ .related-grid{grid-template-columns:repeat(2,1fr)} }
  @media (min-width:1024px){ .related-grid{grid-template-columns:repeat(3,1fr)} .related-grid > *:nth-child(2){transform:translateY(-12px)} }
  .related-link{display:block}
  .related-link .card-title{font-size:17.5px}

  /* ============ 页脚 ============ */
  .site-footer{background:var(--ink-900);padding:64px 0 0;margin-top:76px}
  .site-footer h3{color:#fff;font-size:15px;font-weight:600;margin:0 0 14px}
  .footer-brand-mark{
    width:44px;height:44px;border-radius:12px;background:var(--brand-600);color:#fff;
    display:grid;place-items:center;font-size:14px;font-weight:700;flex:0 0 44px;
  }
  .footer-link{
    display:block;padding:6px 0;font-size:14px;color:#94A3B8;
    transition:color .2s ease-out,transform .2s ease-out;
  }
  .footer-link:hover{color:var(--teal-600);transform:translateX(2px)}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.1);margin-top:48px;padding:22px 0;
    display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;
    font-size:13px;color:#94A3B8;
  }

  @media (max-width:640px){
    .stat-row{grid-template-columns:repeat(2,1fr)}
    .stat:nth-child(2){border-right:0}
    .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
    .hero-card{padding:14px;min-height:0}
    .hero-strip{padding:20px;border-radius:12px}
    .cta-band{padding:26px 22px;border-radius:16px}
    .check-wrap{padding:20px}
    .section{padding:52px 0}
  }

/* roulang page: category3 */
:root{
  --brand-700:#1B37A0;--brand-600:#2549C8;--brand-500:#3D63E0;--brand-50:#EEF2FF;--brand-25:#F5F7FE;
  --teal-600:#0FA98F;--teal-50:#E7F7F3;
  --amber-500:#F97316;
  --ink-900:#0F172A;--ink-600:#475569;--ink-400:#94A3B8;
  --line:#E6ECF5;--bg:#F6F8FC;--surface:#FFFFFF;--surface-alt:#EEF3FB;
  --r-card:16px;--r-btn:10px;--r-img:12px;--r-pill:999px;
  --sh-card:0 1px 2px rgba(15,23,42,.04),0 8px 24px rgba(37,73,200,.08);
  --sh-hover:0 14px 34px rgba(37,73,200,.16);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink-600);
  font-family:"PingFang SC","HarmonyOS Sans","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--ink-900);line-height:1.28;letter-spacing:-.01em;font-weight:700}
p{margin:0}
.container-main{max-width:1200px;margin:0 auto;padding:0 20px}
.container-wide{max-width:1280px;margin:0 auto;padding:0 20px}
@media(min-width:1024px){
  .container-main,.container-wide{padding:0 32px}
}
.section{padding:56px 0}
@media(min-width:1024px){.section{padding:92px 0}}
.section-head{max-width:780px}
.section-head h2{font-size:28px;margin-bottom:14px}
@media(min-width:1024px){.section-head h2{font-size:34px}}
.section-sub{font-size:16px;color:var(--ink-600)}
.eyebrow{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--teal-600);background:var(--teal-50);padding:5px 12px;border-radius:var(--r-pill);margin-bottom:14px;
}
.eyebrow-brand{color:var(--brand-600);background:var(--brand-50)}
.section-alt{background:var(--surface-alt)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 22px;
  border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background-color .2s ease-out,color .2s ease-out,transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-2px);box-shadow:0 10px 24px rgba(27,55,160,.26)}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-25);border-color:rgba(37,73,200,.3);transform:translateY(-2px)}
.btn-light{background:#fff;color:var(--brand-700)}
.btn-light:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(15,23,42,.24)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.6);color:#fff}
.btn-outline-light:hover{background:rgba(255,255,255,.14)}
.btn:focus-visible,.nav-link:focus-visible,summary:focus-visible,a:focus-visible{outline:2px solid var(--brand-500);outline-offset:2px;border-radius:8px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--brand-600);font-weight:600;font-size:15px;transition:gap .2s ease-out,color .2s ease-out}
.link-arrow:hover{gap:10px;color:var(--brand-700)}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 1px 0 rgba(15,23,42,.02);
}
.nav-wrap{position:relative;display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:72px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;background:var(--brand-600);color:#fff;
  display:grid;place-items:center;font-size:15px;font-weight:700;letter-spacing:.02em;
}
.brand-text strong{display:block;font-size:16px;font-weight:700;color:var(--ink-900);line-height:1.2;white-space:nowrap}
.brand-text span{display:block;font-size:12px;color:var(--ink-400);line-height:1.4}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;padding:10px 14px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;color:var(--ink-600);transition:background-color .2s ease-out,color .2s ease-out;white-space:nowrap;
}
.nav-link:hover{background:var(--brand-25);color:var(--brand-600)}
.nav-link.active{color:var(--brand-600);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;border-radius:2px;background:var(--brand-600);
}
.mega{position:relative}
.mega-panel{
  position:absolute;top:calc(100% + 12px);right:0;width:700px;max-width:calc(100vw - 48px);
  background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--sh-hover);padding:24px;
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .2s ease-out,transform .2s ease-out,visibility .2s ease-out;
}
.mega:hover .mega-panel,.mega:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-grid{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:22px}
.mega-title{font-size:13px;font-weight:600;color:var(--ink-900);margin-bottom:12px;letter-spacing:.02em}
.mega-pill{
  display:inline-flex;align-items:center;padding:7px 14px;border-radius:var(--r-pill);
  background:var(--teal-50);color:var(--teal-600);font-size:13px;font-weight:600;
  transition:background-color .2s ease-out,color .2s ease-out;
}
.mega-pill:hover{background:var(--teal-600);color:#fff}
.mega-list{display:grid;gap:12px}
.mega-list li{font-size:14px;line-height:1.5}
.mega-list a{color:var(--ink-600);font-weight:500;transition:color .2s ease-out}
.mega-list a:hover{color:var(--brand-600)}
.mega-list time{display:block;font-size:12px;color:var(--ink-400);margin-top:3px}
.mega-card{background:var(--brand-25);border-radius:12px;padding:16px;font-size:13px;line-height:1.7;color:var(--ink-600)}
.mega-card strong{display:block;font-size:14px;color:var(--ink-900);margin-bottom:6px}
.nav-toggle-input{display:none}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);border:1px solid var(--line);background:#fff;
  cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-900);transition:transform .2s ease-out}
.nav-mobile{display:none}
@media(max-width:1023px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .nav-mobile{
    display:none;position:absolute;left:-20px;right:-20px;top:100%;background:#fff;
    border-bottom:1px solid var(--line);box-shadow:var(--sh-card);padding:8px 20px 20px;flex-direction:column;
  }
  .nav-toggle-input:checked ~ .nav-mobile{display:flex}
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(2){opacity:0}
  .nav-toggle-input:checked ~ .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
}
@media(min-width:1024px){
  .nav-mobile{display:none !important}
}
.nav-mobile-link{
  display:flex;align-items:center;min-height:48px;font-size:15px;font-weight:500;color:var(--ink-900);
  border-bottom:1px solid var(--line);
}
.nav-mobile-link:last-child{border-bottom:0}
.nav-mobile-link.active{color:var(--brand-600)}
.nav-mobile-note{padding:14px 0 4px;font-size:13px;color:var(--ink-400)}

/* ============ 内页 Hero ============ */
.page-hero{background:linear-gradient(180deg,var(--brand-25) 0%,var(--bg) 100%);border-bottom:1px solid var(--line)}
.hero-inner{display:grid;gap:34px;padding:40px 0 48px;align-items:center}
@media(min-width:1024px){
  .hero-inner{grid-template-columns:1.05fr .95fr;gap:56px;padding:56px 0 68px}
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--ink-400);margin-bottom:18px}
.breadcrumb a{transition:color .2s ease-out}
.breadcrumb a:hover{color:var(--brand-600)}
.breadcrumb span.sep{color:#CBD5E1}
.hero-title{font-size:clamp(28px,4.2vw,46px);letter-spacing:-.02em;margin-bottom:16px}
.hero-sub{font-size:16.5px;max-width:620px;margin-bottom:26px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:28px;padding-top:22px;border-top:1px dashed var(--line)}
.metric-num{display:block;font-size:22px;font-weight:700;color:var(--brand-600);line-height:1.2}
.metric-label{display:block;font-size:13px;color:var(--ink-400)}
.hero-figure{position:relative;border-radius:20px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--sh-card);background:#fff}
.hero-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-badge{
  position:absolute;right:16px;bottom:16px;background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:12px 16px;box-shadow:var(--sh-card);max-width:270px;
}
.hero-badge strong{display:block;font-size:13px;color:var(--ink-900);margin-bottom:4px}
.hero-badge span{display:block;font-size:12.5px;color:var(--ink-600);line-height:1.6}
.hero-tag{
  position:absolute;left:16px;top:16px;background:var(--teal-50);color:var(--teal-600);
  font-size:12.5px;font-weight:600;padding:6px 12px;border-radius:var(--r-pill);
}

/* ============ 功能速览（非对称） ============ */
.feature-band{display:grid;gap:18px;grid-template-columns:1fr;margin-top:34px}
@media(min-width:768px){.feature-band{grid-template-columns:1.6fr 1fr 1fr}}
@media(min-width:1100px){.feature-band{grid-template-columns:1.6fr 1fr 1fr 1fr}}
.band-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;
  box-shadow:var(--sh-card);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.band-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(37,73,200,.28)}
.band-card h3{font-size:17px;margin-bottom:10px}
.band-card p{font-size:14.5px;line-height:1.7}
.band-card-wide{background:var(--brand-25);border-color:rgba(37,73,200,.16)}
.band-icon{
  width:38px;height:38px;border-radius:10px;background:var(--teal-50);color:var(--teal-600);
  display:grid;place-items:center;font-size:15px;font-weight:700;margin-bottom:14px;
}
.band-card-wide .band-icon{background:var(--brand-600);color:#fff}

/* ============ 时间轴 ============ */
.timeline{position:relative;margin-top:40px;padding-left:0}
.tl-item{position:relative;padding-left:56px;padding-bottom:26px}
.tl-item::before{
  content:"";position:absolute;left:17px;top:34px;bottom:-6px;width:2px;background:var(--line);
}
.tl-item:last-child{padding-bottom:0}
.tl-item:last-child::before{display:none}
.tl-node{
  position:absolute;left:0;top:0;width:36px;height:36px;border-radius:50%;background:#fff;
  border:2px solid var(--brand-500);color:var(--brand-600);display:grid;place-items:center;
  font-size:14px;font-weight:700;z-index:1;
}
.tl-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;
  box-shadow:var(--sh-card);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
}
.tl-card:hover{transform:translateY(-3px);box-shadow:var(--sh-hover);border-color:rgba(37,73,200,.28)}
.tl-card h3{font-size:19px;margin-bottom:10px}
.tl-card p{font-size:15px;line-height:1.75}
.tl-points{display:grid;gap:8px;margin-top:14px;padding-top:14px;border-top:1px dashed var(--line)}
.tl-points li{display:flex;gap:10px;font-size:14.5px;line-height:1.7}
.tl-points li::before{content:"✓";color:var(--teal-600);font-weight:700;flex:0 0 auto}
@media(min-width:900px){
  .timeline{max-width:860px;margin-left:auto;margin-right:auto}
}

/* ============ 对照表 ============ */
.table-wrap{
  margin-top:32px;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  box-shadow:var(--sh-card);overflow-x:auto;
}
.table-wrap table{width:100%;min-width:660px;border-collapse:collapse}
.table-wrap thead th{
  background:var(--brand-50);color:var(--ink-900);font-size:14px;font-weight:600;text-align:left;
  padding:15px 20px;white-space:nowrap;
}
.table-wrap tbody td{padding:15px 20px;font-size:14.5px;border-top:1px solid var(--line);vertical-align:top}
.table-wrap tbody tr:nth-child(even){background:#FAFBFE}
.table-wrap tbody td:first-child{color:var(--ink-900);font-weight:600}
.cell-yes{color:var(--teal-600);font-weight:600}
.cell-note{color:var(--ink-600)}

/* ============ 注意事项提示卡 ============ */
.notice{
  border-left:4px solid var(--amber-500);background:#FFF7F1;border-radius:0 14px 14px 0;
  padding:22px 24px;box-shadow:0 1px 2px rgba(15,23,42,.03);
}
.notice h3{font-size:18px;margin-bottom:10px}
.notice p{font-size:14.5px;line-height:1.75}
.notice-list{display:grid;gap:12px;margin-top:16px}
.notice-list li{display:flex;gap:10px;font-size:14.5px;line-height:1.7}
.notice-list li::before{content:"!";flex:0 0 20px;height:20px;margin-top:3px;border-radius:50%;background:var(--amber-500);color:#fff;font-size:12px;font-weight:700;display:grid;place-items:center}

/* ============ FAQ ============ */
.faq-list{margin-top:32px;max-width:900px}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:12px;
  transition:border-color .2s ease-out,background-color .2s ease-out;
}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;font-size:17px;font-weight:600;color:var(--ink-900);
  display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:22px;font-weight:400;color:var(--brand-600);line-height:1;transition:transform .2s ease-out;
}
.faq-item[open]{border-left:4px solid var(--brand-600);background:var(--brand-25);border-color:rgba(37,73,200,.28)}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-answer{padding:0 22px 20px;font-size:15px;line-height:1.75;color:var(--ink-600)}

/* ============ CTA ============ */
.cta-band{background:var(--brand-600);border-radius:20px;padding:36px 28px;color:#fff}
@media(min-width:900px){.cta-band{padding:48px 52px}}
.cta-inner{display:grid;gap:26px;align-items:center}
@media(min-width:900px){.cta-inner{grid-template-columns:1.5fr 1fr;gap:40px}}
.cta-band h2{color:#fff;font-size:26px;margin-bottom:12px}
@media(min-width:1024px){.cta-band h2{font-size:30px}}
.cta-band p{color:rgba(255,255,255,.86);font-size:15.5px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media(min-width:900px){.cta-actions{justify-content:flex-end}}

/* ============ 相关分类 ============ */
.rel-grid{display:grid;gap:20px;grid-template-columns:1fr;margin-top:32px}
@media(min-width:900px){.rel-grid{grid-template-columns:1.4fr 1fr 1fr}}
.rel-card{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:24px;
  box-shadow:var(--sh-card);transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;height:100%;
}
.rel-card:hover{transform:translateY(-4px);box-shadow:var(--sh-hover);border-color:rgba(37,73,200,.28)}
.rel-card h3{font-size:18px;margin-bottom:10px;transition:color .2s ease-out}
.rel-card:hover h3{color:var(--brand-600)}
.rel-card p{font-size:14.5px;line-height:1.7;margin-bottom:16px}
.rel-card-current{background:var(--teal-50);border-color:rgba(15,169,143,.28)}
.tag{
  display:inline-flex;align-items:center;padding:4px 11px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;background:var(--brand-50);color:var(--brand-600);
}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink-900);color:#CBD5E1;padding:60px 0 0;margin-top:72px}
.site-footer h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.footer-brand-mark{
  width:44px;height:44px;flex:0 0 44px;border-radius:12px;background:var(--brand-600);color:#fff;
  display:grid;place-items:center;font-size:15px;font-weight:700;
}
.footer-link{display:block;padding:6px 0;font-size:14px;color:#CBD5E1;transition:color .2s ease-out,transform .2s ease-out}
.footer-link:hover{color:var(--teal-600);transform:translateX(2px)}
.tick{flex:0 0 auto;font-weight:700}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(148,163,184,.24);padding:20px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  font-size:13px;color:var(--ink-400);
}
.footer-bottom a{color:var(--ink-400)}
.footer-bottom a:hover{color:var(--teal-600)}