/* roulang page: index */
:root{
    --brand:#1F5FD8;
    --brand-dark:#16408F;
    --brand-light:#E8EFFD;
    --accent:#12B39A;
    --warm:#FF8A3D;
    --bg:#F5F8FC;
    --card:#FFFFFF;
    --line:#E3EAF4;
    --ink:#1B2A41;
    --ink-2:#5C6E88;
    --ink-3:#93A3B8;
    --shadow-sm:0 1px 2px rgba(23,58,120,.06);
    --shadow-md:0 6px 18px rgba(23,58,120,.08);
    --shadow-lg:0 18px 40px rgba(23,58,120,.10);
    --r-lg:16px;
    --r-md:12px;
    --r-btn:10px;
    --r-img:14px;
  }
  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;
    font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Source Han Sans SC','Inter',system-ui,sans-serif;
    background:var(--bg);
    color:var(--ink);
    font-size:17px;
    line-height:1.85;
    letter-spacing:0;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-radius:var(--r-img);background:#EDF2F9;height:auto}
  a{color:inherit;text-decoration:none}
  button,input,textarea,select{font:inherit;color:inherit}
  h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-0.01em;font-weight:700}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  .container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
  @media (min-width:768px){.container-x{padding:0 32px}}
  .section{padding:56px 0}
  @media (min-width:768px){.section{padding:72px 0}}
  @media (min-width:1024px){.section{padding:96px 0}}
  .h1-title{font-size:30px;line-height:1.25}
  @media (min-width:1024px){.h1-title{font-size:44px}}
  .h2-title{font-size:22px}
  @media (min-width:1024px){.h2-title{font-size:28px}}
  .h3-title{font-size:17px}
  @media (min-width:1024px){.h3-title{font-size:19px}}
  .lead{color:var(--ink-2);font-size:17px;line-height:1.85}
  .meta{font-size:13px;color:var(--ink-2);line-height:1.7}
  .title-rule{display:block;width:40px;height:4px;border-radius:2px;background:var(--brand);margin-top:14px}

  /* 头部导航卡 */
  .site-header{position:sticky;top:0;z-index:60;padding:14px 0 10px;transition:background-color .2s ease}
  .site-header.is-scrolled{background:rgba(245,248,252,.96)}
  .nav-card{
    display:flex;align-items:center;gap:14px;
    background:#fff;border-radius:var(--r-lg);
    box-shadow:var(--shadow-md);
    padding:10px 12px;
    transition:box-shadow .2s ease;
  }
  .site-header.is-scrolled .nav-card{box-shadow:var(--shadow-lg)}
  .nav-logo{display:flex;align-items:center;gap:10px;flex:none}
  .logo-mark{
    width:38px;height:38px;border-radius:11px;flex:none;
    background:linear-gradient(135deg,var(--brand) 0%,var(--brand-dark) 100%);
    color:#fff;font-weight:700;font-size:18px;
    display:flex;align-items:center;justify-content:center;
    box-shadow:var(--shadow-sm);
  }
  .logo-text{font-weight:700;font-size:17px;letter-spacing:-0.01em;white-space:nowrap}
  .nav-links{display:none;align-items:center;gap:8px;margin-left:auto}
  .nav-item{
    display:flex;align-items:center;gap:8px;
    min-width:104px;padding:8px 12px;
    border:1px solid var(--line);border-radius:var(--r-md);
    background:#fff;color:var(--ink-2);font-size:14px;font-weight:600;
    transition:transform .16s ease,background-color .16s ease,border-color .16s ease,color .16s ease;
  }
  .nav-item .ni-ico{
    width:26px;height:26px;border-radius:8px;background:var(--brand-light);
    display:flex;align-items:center;justify-content:center;color:var(--brand);flex:none;
  }
  .nav-item:hover{transform:translateY(-1px);background:var(--brand-light);border-color:#C9DAF8;color:var(--brand-dark)}
  .nav-item:hover .ni-ico{background:#fff;color:var(--brand)}
  .nav-item.is-active{background:var(--brand-light);border-color:var(--brand);color:var(--brand-dark)}
  .nav-cta{display:none;flex:none}
  @media (min-width:1024px){
    .nav-links{display:flex}
    .nav-cta{display:block}
    .nav-toggle{display:none !important}
  }
  .nav-toggle{
    margin-left:auto;width:40px;height:40px;border-radius:12px;
    border:1px solid var(--line);background:#fff;
    display:flex;align-items:center;justify-content:center;cursor:pointer;
    transition:border-color .16s ease,background-color .16s ease;
  }
  .nav-toggle:hover{border-color:var(--brand);background:var(--brand-light)}
  .mobile-panel{
    display:none;background:#fff;border-radius:var(--r-lg);
    box-shadow:var(--shadow-lg);padding:14px;margin-top:10px;
  }
  .mobile-panel.is-open{display:block;animation:panelIn .18s ease both}
  @keyframes panelIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
  .mp-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-bottom:12px}
  .mp-item{
    display:flex;align-items:center;gap:8px;padding:12px;
    border:1px solid var(--line);border-radius:var(--r-md);
    font-size:14px;font-weight:600;color:var(--ink-2);
  }
  .mp-item.is-active{background:var(--brand-light);border-color:var(--brand);color:var(--brand-dark)}

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:46px;padding:0 24px;border-radius:var(--r-btn);
    font-size:15px;font-weight:600;border:1px solid transparent;
    cursor:pointer;transition:transform .16s ease,box-shadow .16s ease,background-color .16s ease,border-color .16s ease,color .16s ease;
    white-space:nowrap;
  }
  .btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
  .btn-primary{background:var(--brand);color:#fff}
  .btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}
  .btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-sm)}
  .btn-secondary{background:#fff;color:var(--brand);border-color:var(--line)}
  .btn-secondary:hover{border-color:var(--brand);background:var(--brand-light);transform:translateY(-1px)}
  .btn-secondary:active{transform:translateY(0)}
  .btn-ghost{background:transparent;color:var(--brand);padding:0 4px;height:auto}
  .btn-ghost .arrow{transition:transform .16s ease;display:inline-block}
  .btn-ghost:hover .arrow{transform:translateX(2px)}
  .btn-download{background:var(--brand);color:#fff;justify-content:flex-start;width:100%}
  .btn-download:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}
  .btn-download .ver{font-size:12px;color:#CFE0FB;font-weight:500}
  .btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;transform:none}

  /* 卡片 */
  .card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
    padding:22px;box-shadow:var(--shadow-sm);
    transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease;
  }
  .card-hover:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:#D3E0F4}
  .card-flat{background:var(--card);border-radius:var(--r-lg);padding:22px;box-shadow:var(--shadow-sm)}
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    padding:4px 12px;border-radius:999px;
    background:var(--brand-light);color:var(--brand-dark);
    font-size:12px;font-weight:600;line-height:1.6;
  }
  .badge-accent{background:rgba(18,179,154,.12);color:#0E8F7C}
  .badge-mute{background:#EFF3F9;color:var(--ink-2);font-family:'SFMono-Regular',Consolas,monospace}
  .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);display:inline-block;flex:none}
  .stars{color:var(--accent);font-size:14px;letter-spacing:1px}

  /* Hero */
  .hero{position:relative;overflow:hidden;padding:36px 0 56px}
  .hero::before{
    content:"";position:absolute;top:-40px;right:-120px;width:520px;height:420px;
    background:rgba(31,95,216,.05);transform:skewX(-16deg);border-radius:32px;pointer-events:none;
  }
  .hero-grid{position:relative;display:grid;gap:36px}
  @media (min-width:1024px){.hero-grid{grid-template-columns:6fr 6fr;align-items:center;gap:48px;padding:24px 0}}
  .hero-visual{position:relative}
  .hero-visual img{border-radius:20px;box-shadow:var(--shadow-lg);width:100%;object-fit:cover}
  .float-card{
    position:absolute;left:-6px;bottom:-18px;
    background:#fff;border-radius:var(--r-md);box-shadow:var(--shadow-lg);
    padding:12px 16px;border:1px solid var(--line);
  }
  @media (min-width:768px){.float-card{left:-24px;bottom:24px}}
  .stat-row{display:flex;flex-wrap:wrap;gap:14px 28px;margin-top:22px}
  .stat-num{font-size:20px;font-weight:700;color:var(--brand-dark)}

  /* 价值区 */
  .value-grid{display:grid;gap:20px}
  @media (min-width:1024px){.value-grid{grid-template-columns:58% 1fr}}
  .value-main{
    background:#fff;border-radius:var(--r-lg);border:1px solid var(--line);
    box-shadow:var(--shadow-sm);padding:28px;
  }
  .value-stack{display:grid;gap:14px}
  .value-strip{
    display:flex;gap:14px;align-items:flex-start;
    background:#fff;border-radius:var(--r-lg);border:1px solid var(--line);
    box-shadow:var(--shadow-sm);padding:18px;
    transition:transform .16s ease,box-shadow .16s ease;
  }
  .value-strip:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
  .ico-box{
    width:42px;height:42px;border-radius:12px;flex:none;
    background:var(--brand-light);color:var(--brand);
    display:flex;align-items:center;justify-content:center;
  }
  .check-list li{display:flex;gap:10px;align-items:flex-start;color:var(--ink-2);font-size:15px;margin-top:10px}
  .check-list .ck{color:var(--accent);font-weight:700;flex:none}

  /* 轮播 */
  .rail-wrap{position:relative}
  .rail{
    display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;
    padding:6px 2px 22px;scrollbar-width:none;
  }
  .rail::-webkit-scrollbar{display:none}
  .rail-card{
    flex:0 0 86%;max-width:320px;scroll-snap-align:start;
    background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
    padding:14px;box-shadow:var(--shadow-sm);
    transition:transform .16s ease,box-shadow .16s ease;
  }
  @media (min-width:768px){.rail-card{flex:0 0 46%}}
  @media (min-width:1024px){.rail-card{flex:0 0 320px}}
  .rail-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}
  .rail-card img{aspect-ratio:16/9;object-fit:cover;margin-bottom:14px}
  .rail-btn{
    width:40px;height:40px;border-radius:50%;background:#fff;border:1px solid var(--line);
    display:none;align-items:center;justify-content:center;color:var(--brand);cursor:pointer;
    transition:border-color .16s ease,background-color .16s ease;
  }
  .rail-btn:hover{border-color:var(--brand);background:var(--brand-light)}
  @media (min-width:1024px){.rail-btn{display:flex}}
  .rail-fade{position:absolute;right:0;top:0;bottom:22px;width:70px;background:linear-gradient(90deg,rgba(245,248,252,0),var(--bg));pointer-events:none}
  @media (min-width:1024px){.rail-fade{display:none}}

  /* 系统要求 */
  .kv-grid{display:grid;gap:16px}
  @media (min-width:768px){.kv-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.kv-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
  .kv-card{display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:18px;box-shadow:var(--shadow-sm)}
  .kv-label{font-size:13px;color:var(--ink-2)}
  .kv-value{font-size:15px;font-weight:600;margin-top:2px}

  /* 评价墙 */
  .review-grid{display:grid;gap:18px}
  @media (min-width:768px){.review-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.review-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
  @media (min-width:768px){.review-grid>*:nth-child(even){transform:translateY(24px)}}
  .avatar{
    width:40px;height:40px;border-radius:50%;flex:none;
    background:var(--brand-light);color:var(--brand-dark);
    display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;
  }

  /* 下载模块 */
  .download-panel{
    background:var(--brand-light);border-radius:var(--r-lg);
    padding:28px;box-shadow:var(--shadow-lg);
  }
  .dl-grid{display:grid;gap:14px}
  @media (min-width:768px){.dl-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
  .qr-box{
    width:144px;height:144px;background:#fff;border-radius:var(--r-md);
    border:1px solid var(--line);display:flex;flex-direction:column;
    align-items:center;justify-content:center;gap:8px;flex:none;
    background-image:
      repeating-linear-gradient(0deg,rgba(27,42,65,.10) 0 6px,transparent 6px 12px),
      repeating-linear-gradient(90deg,rgba(27,42,65,.10) 0 6px,transparent 6px 12px);
  }
  .qr-inner{background:#fff;border-radius:10px;padding:8px 10px;font-size:13px;font-weight:700;color:var(--brand-dark);box-shadow:var(--shadow-sm)}

  /* CMS 列表 */
  .post-grid{display:grid;gap:20px}
  @media (min-width:768px){.post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.post-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
  .post-card{display:flex;flex-direction:column;height:100%}
  .post-card h3{font-size:17px;line-height:1.5;margin:12px 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
  .post-card .excerpt{color:var(--ink-2);font-size:14.5px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;flex:1}
  .empty-state{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);min-height:220px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px;text-align:center;padding:28px;box-shadow:var(--shadow-sm)}

  /* FAQ */
  .faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow-sm);margin-bottom:12px;overflow:hidden}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:16px 18px;font-size:16px;font-weight:600;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-plus{
    width:28px;height:28px;border-radius:50%;flex:none;background:var(--brand-light);color:var(--brand);
    display:flex;align-items:center;justify-content:center;font-size:18px;line-height:1;
    transition:transform .18s ease;
  }
  .faq-item[open] .faq-plus{transform:rotate(45deg)}
  .faq-body{padding:0 18px 16px;color:var(--ink-2);font-size:15px;line-height:1.8}

  /* CTA */
  .cta-panel{
    background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--shadow-md);padding:36px 24px;text-align:center;
  }

  /* 页脚 */
  .site-footer{background:#fff;border-top:1px solid var(--line);margin-top:20px}
  .footer-grid{display:grid;gap:28px;padding:48px 0 28px}
  @media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr}}
  .footer-title{font-size:14px;font-weight:700;margin-bottom:12px}
  .footer-link{display:block;font-size:13px;color:var(--ink-2);line-height:2;transition:color .16s ease}
  .footer-link:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
  .footer-bottom{border-top:1px solid var(--line);padding:18px 0 28px;display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;font-size:13px;color:var(--ink-2)}

  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important;scroll-behavior:auto !important}
  }

/* roulang page: article */
:root{
    --brand:#1F5FD8; --brand-dark:#16408F; --brand-light:#E8EFFD;
    --accent:#12B39A; --warm:#FF8A3D;
    --bg:#F5F8FC; --card:#FFFFFF; --line:#E3EAF4;
    --text:#1B2A41; --muted:#5C6E88; --disabled:#93A3B8;
    --r-lg:16px; --r-md:12px; --r-sm:10px; --r-img:14px;
    --sh-sm:0 1px 2px rgba(23,58,120,.06);
    --sh-md:0 6px 18px rgba(23,58,120,.08);
    --sh-lg:0 18px 40px rgba(23,58,120,.10);
  }
  *{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
  body{
    margin:0;background:var(--bg);color:var(--text);
    font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Source Han Sans SC',Inter,system-ui,sans-serif;
    font-size:16.5px;line-height:1.85;letter-spacing:0;
  }
  img{max-width:100%;display:block}
  a{color:inherit;text-decoration:none}
  button{font-family:inherit;cursor:pointer}
  h1,h2,h3,h4{line-height:1.25;letter-spacing:-.01em;margin:0}
  .container-x{max-width:1200px;margin:0 auto;padding:0 32px}
  @media (max-width:640px){ .container-x{padding:0 20px} }

  a:focus-visible,button:focus-visible,input:focus-visible{
    outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;
  }

  /* ---------- header ---------- */
  .site-header{position:sticky;top:0;z-index:70;padding:16px 0 0;transition:padding .2s ease}
  .site-header.is-scrolled{padding-top:10px}
  .nav-card{
    display:flex;align-items:center;gap:16px;
    background:rgba(255,255,255,.96);border:1px solid rgba(227,234,244,.9);
    border-radius:var(--r-lg);box-shadow:var(--sh-md);padding:10px 14px;
    transition:box-shadow .2s ease,background .2s ease;
  }
  .site-header.is-scrolled .nav-card{box-shadow:var(--sh-lg);background:rgba(255,255,255,.99)}
  .nav-logo{display:inline-flex;align-items:center;gap:10px;font-weight:700;flex:0 0 auto}
  .logo-mark{
    width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
    background:linear-gradient(135deg,#2A6BE6,#16408F);color:#fff;font-size:17px;font-weight:700;
    box-shadow:0 4px 12px rgba(23,58,120,.18);
  }
  .logo-text{font-size:17px;font-weight:700;color:var(--text)}
  .nav-links{display:flex;align-items:center;gap:8px;margin-left:auto}
  .nav-item{
    display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border-radius:var(--r-md);
    border:1px solid var(--line);background:#fff;color:var(--muted);font-size:14px;font-weight:500;
    transition:all .16s ease;white-space:nowrap;
  }
  .nav-item .ni-ico{display:grid;place-items:center;color:var(--muted);transition:color .16s ease}
  .nav-item:hover{color:var(--brand);border-color:var(--brand);background:var(--brand-light);transform:translateY(-1px)}
  .nav-item:hover .ni-ico{color:var(--brand)}
  .nav-item.is-active{color:var(--brand);background:var(--brand-light);border-color:var(--brand)}
  .nav-item.is-active .ni-ico{color:var(--brand)}
  .nav-cta{flex:0 0 auto}
  .nav-toggle{
    display:none;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
    background:#fff;place-items:center;margin-left:auto;
  }
  .mobile-panel{display:none;margin-top:10px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-md);padding:14px}
  .mobile-panel.is-open{display:block;animation:panelIn .18s ease}
  @keyframes panelIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
  .mp-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
  .mp-item{
    padding:12px;border-radius:var(--r-md);border:1px solid var(--line);font-size:14px;
    color:var(--muted);background:#fff;text-align:center;font-weight:500;
  }
  .mp-item.is-active{color:var(--brand);background:var(--brand-light);border-color:var(--brand)}
  .mp-cta{margin-top:12px;display:block;text-align:center}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    height:46px;padding:0 24px;border-radius:var(--r-sm);font-size:15px;font-weight:600;
    border:1px solid transparent;transition:all .16s ease;white-space:nowrap;
  }
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 4px 12px rgba(23,58,120,.14)}
  .btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:var(--sh-md)}
  .btn-primary:active{transform:translateY(0)}
  .btn-ghost{background:#fff;color:var(--brand);border-color:var(--line)}
  .btn-ghost:hover{border-color:var(--brand);background:var(--brand-light)}
  .btn-text{color:var(--brand);font-weight:600;font-size:14.5px;display:inline-flex;align-items:center;gap:6px}
  .btn-text svg{transition:transform .16s ease}
  .btn-text:hover svg{transform:translateX(2px)}
  .btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}

  /* ---------- badges / misc ---------- */
  .badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;background:var(--brand-light);color:var(--brand);font-size:12px;font-weight:600}
  .badge-plain{background:#F1F5FB;color:var(--muted)}
  .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);display:inline-block}
  .meta{color:var(--muted);font-size:13px}
  .lead{color:var(--muted);font-size:16.5px;line-height:1.9}

  /* ---------- page head ---------- */
  .page-head{position:relative;overflow:hidden;padding:40px 0 34px;background:linear-gradient(180deg,#FFFFFF 0%,#F5F8FC 100%)}
  .page-head::after{
    content:"";position:absolute;right:-120px;top:-80px;width:420px;height:280px;
    background:rgba(31,95,216,.05);transform:skewX(-18deg);border-radius:32px;pointer-events:none;
  }
  .breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:13px;color:var(--muted);margin-bottom:18px;position:relative;z-index:1}
  .breadcrumb a{color:var(--muted)}
  .breadcrumb a:hover{color:var(--brand)}
  .breadcrumb .sep{color:var(--disabled)}
  .breadcrumb .current{color:var(--brand);max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .article-h1{font-size:44px;font-weight:700;max-width:900px;position:relative;z-index:1}
  .article-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:16px;font-size:13px;color:var(--muted);position:relative;z-index:1}
  .article-meta .vline{width:1px;height:12px;background:var(--line)}

  /* ---------- article layout ---------- */
  .article-section{padding:48px 0 88px}
  .article-grid{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:40px;align-items:start}
  .article-main{max-width:800px;min-width:0}

  .promo-card{
    display:flex;align-items:center;gap:18px;flex-wrap:wrap;
    background:var(--brand-light);border:1px solid #D6E3FB;border-radius:var(--r-lg);
    padding:20px 22px;box-shadow:var(--sh-sm);
  }
  .promo-ico{
    width:48px;height:48px;border-radius:12px;background:#fff;display:grid;place-items:center;
    color:var(--brand);flex:0 0 auto;box-shadow:var(--sh-sm);
  }
  .promo-txt{flex:1 1 240px;min-width:0}
  .promo-txt h3{font-size:17px;font-weight:700;margin-bottom:4px}
  .promo-txt p{margin:0;font-size:13.5px;color:var(--muted)}

  .article-content{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
    padding:32px 34px;box-shadow:var(--sh-sm);margin:24px 0;
  }
  .article-content p{margin:0 0 20px;line-height:1.9;color:var(--text)}
  .article-content h2{
    position:relative;font-size:26px;font-weight:700;margin:40px 0 16px;padding-left:16px;
  }
  .article-content h2:first-child{margin-top:0}
  .article-content h2::before{
    content:"";position:absolute;left:0;top:.28em;width:4px;height:1em;border-radius:2px;background:var(--brand);
  }
  .article-content h3{font-size:19px;font-weight:700;margin:28px 0 12px}
  .article-content h4{font-size:17px;font-weight:600;margin:22px 0 10px}
  .article-content ul,.article-content ol{padding-left:22px;margin:0 0 20px;line-height:2}
  .article-content li::marker{color:var(--brand)}
  .article-content li{margin-bottom:4px}
  .article-content a{color:var(--brand);text-decoration:none;border-bottom:1px solid rgba(31,95,216,.35)}
  .article-content a:hover{border-bottom-color:var(--brand)}
  .article-content blockquote{
    margin:24px 0;padding:16px 18px;background:#F4F8FF;border-left:3px solid var(--brand);
    border-radius:0 var(--r-md) var(--r-md) 0;color:var(--muted);font-size:15px;
  }
  .article-content blockquote p:last-child{margin-bottom:0}
  .article-content img{border-radius:var(--r-img);margin:24px 0;width:100%;height:auto;background:#EDF2F9}
  .article-content figure{margin:24px 0}
  .article-content figcaption,.article-content .img-cap{text-align:center;font-size:13px;color:var(--muted);margin-top:-12px;margin-bottom:20px}
  .article-content table{width:100%;border-collapse:collapse;font-size:14.5px;margin:24px 0}
  .article-content .table-scroll{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);margin:24px 0}
  .article-content .table-scroll table{margin:0;min-width:520px}
  .article-content th{background:#F1F6FE;text-align:left;padding:12px 14px;font-weight:600;border-bottom:1px solid var(--line)}
  .article-content td{padding:12px 14px;border-bottom:1px solid var(--line);color:var(--muted)}
  .article-content hr{border:none;border-top:1px solid var(--line);margin:32px 0}

  .empty-state{
    text-align:center;padding:48px 20px;background:#fff;border:1px dashed var(--line);
    border-radius:var(--r-lg);
  }
  .empty-state h2{font-size:22px;margin-bottom:10px}
  .empty-state p{color:var(--muted);margin-bottom:20px}

  /* ---------- shared cards ---------- */
  .card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--sh-sm);padding:22px;transition:transform .16s ease,box-shadow .16s ease;
  }
  .card:hover{transform:translateY(-2px);box-shadow:var(--sh-md)}
  .card img{border-radius:var(--r-img);width:100%;aspect-ratio:16/9;object-fit:cover;background:#EDF2F9}

  .block-title{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:22px}
  .block-title h2{font-size:24px;font-weight:700}
  .block-title .short-line{width:40px;height:3px;border-radius:2px;background:var(--brand);margin-top:10px}

  .rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
  .rel-card .rel-body{padding-top:14px}
  .rel-card h3{font-size:16px;font-weight:600;line-height:1.5;margin-bottom:8px}
  .rel-card p{font-size:13.5px;color:var(--muted);margin:0 0 12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

  .pn-row{display:flex;gap:16px;margin-top:32px}
  .pn-item{
    flex:1 1 0;min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--r-md);
    padding:16px 18px;transition:all .16s ease;
  }
  .pn-item:hover{border-color:var(--brand);background:var(--brand-light)}
  .pn-item .pn-label{font-size:12.5px;color:var(--muted);display:flex;align-items:center;gap:6px;margin-bottom:6px}
  .pn-item .pn-title{font-size:14.5px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

  /* ---------- sidebar ---------- */
  .article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
  .side-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--sh-sm);padding:20px}
  .side-card h3{font-size:15.5px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px}
  .side-dl{text-align:left}
  .side-dl .sd-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
  .side-dl .sd-mark{width:42px;height:42px;border-radius:12px;background:var(--brand-light);color:var(--brand);display:grid;place-items:center;font-weight:700}
  .side-dl .sd-name{font-size:15px;font-weight:700}
  .side-dl .sd-sub{font-size:12.5px;color:var(--muted)}
  .side-dl .btn{width:100%;margin-top:6px}
  .side-list{list-style:none;margin:0;padding:0}
  .side-list li{padding:11px 0;border-bottom:1px dashed var(--line)}
  .side-list li:last-child{border-bottom:none}
  .side-list a{display:block;font-size:14px;color:var(--text);line-height:1.6}
  .side-list a:hover{color:var(--brand)}
  .side-list .sl-time{font-size:12.5px;color:var(--disabled);margin-top:4px}
  .cat-links{display:flex;flex-direction:column;gap:10px}
  .cat-link{
    display:flex;align-items:center;gap:10px;padding:11px 13px;border-radius:var(--r-md);
    border:1px solid var(--line);font-size:14px;color:var(--muted);transition:all .16s ease;
  }
  .cat-link:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-light)}
  .cat-link .ci{width:26px;height:26px;border-radius:8px;background:var(--brand-light);color:var(--brand);display:grid;place-items:center;flex:0 0 auto}

  /* ---------- download block ---------- */
  .dl-block{
    margin-top:40px;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
    box-shadow:var(--sh-lg);padding:30px;
  }
  .dl-head{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;margin-bottom:22px}
  .dl-head h2{font-size:22px;font-weight:700}
  .dl-head p{margin:6px 0 0;font-size:13.5px;color:var(--muted)}
  .dl-body{display:flex;gap:24px;flex-wrap:wrap;align-items:center;justify-content:space-between}
  .dl-btns{display:flex;gap:12px;flex-wrap:wrap}
  .dl-btns .btn{padding:0 22px}
  .qr-wrap{display:flex;align-items:center;gap:14px}
  .qr-box{
    width:120px;height:120px;border-radius:var(--r-md);background:#fff;border:1px solid var(--line);
    display:grid;place-items:center;box-shadow:var(--sh-sm);
  }
  .qr-inner{font-size:12px;color:var(--muted);text-align:center;line-height:1.5}

  /* ---------- FAQ ---------- */
  .faq-list{display:flex;flex-direction:column;gap:12px}
  .faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--sh-sm);overflow:hidden}
  .faq-q{
    width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:16px 18px;background:none;border:none;text-align:left;font-size:16px;font-weight:600;color:var(--text);
  }
  .faq-plus{
    width:28px;height:28px;border-radius:50%;background:var(--brand-light);color:var(--brand);
    display:grid;place-items:center;flex:0 0 auto;transition:transform .18s ease;font-size:16px;line-height:1;
  }
  .faq-item.is-open .faq-plus{transform:rotate(45deg)}
  .faq-a{display:none;padding:0 18px 14px;font-size:15px;color:var(--muted);line-height:1.8}
  .faq-item.is-open .faq-a{display:block}

  /* ---------- footer ---------- */
  .site-footer{background:#fff;border-top:1px solid var(--line);margin-top:20px;padding:56px 0 24px}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
  .footer-title{font-size:14px;font-weight:700;margin-bottom:14px;color:var(--text)}
  .footer-link{display:block;font-size:13px;color:var(--muted);line-height:2;transition:color .16s ease}
  .footer-link:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
  .qr-box-sm{
    width:96px;height:96px;border-radius:var(--r-md);background:#F5F8FC;border:1px dashed var(--line);
    display:grid;place-items:center;
  }
  .qr-inner-sm{font-size:12px;color:var(--muted);text-align:center;padding:6px 8px;line-height:1.5}
  .footer-bottom{
    margin-top:36px;padding-top:18px;border-top:1px solid var(--line);
    display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
    font-size:12.5px;color:var(--disabled);
  }

  @media (max-width:1024px){
    .article-grid{grid-template-columns:minmax(0,1fr);gap:28px}
    .article-side{position:static;flex-direction:row;flex-wrap:wrap}
    .article-side .side-card{flex:1 1 260px}
    .article-main{max-width:none}
    .article-h1{font-size:36px}
    .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  }
  @media (max-width:980px){
    .nav-links,.nav-cta{display:none}
    .nav-toggle{display:grid}
  }
  @media (max-width:768px){
    .article-h1{font-size:30px}
    .article-content{padding:24px 20px}
    .article-content h2{font-size:22px}
    .article-content h3{font-size:17.5px}
    .page-head{padding:28px 0 24px}
    .article-section{padding:32px 0 60px}
    .dl-block{padding:22px}
    .dl-btns{width:100%;flex-direction:column}
    .dl-btns .btn{width:100%}
    .qr-wrap{width:100%;justify-content:flex-start}
    .pn-row{flex-direction:column}
    .rel-grid{grid-template-columns:minmax(0,1fr)}
    .footer-grid{grid-template-columns:1fr}
    .article-side{flex-direction:column}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
  }

/* roulang page: category1 */
:root {
    --brand: #1F5FD8;
    --brand-deep: #16408F;
    --brand-soft: #E8EFFD;
    --accent: #12B39A;
    --warm: #FF8A3D;
    --bg: #F5F8FC;
    --card: #FFFFFF;
    --line: #E3EAF4;
    --ink: #1B2A41;
    --ink-2: #5C6E88;
    --ink-3: #93A3B8;
    --sh-sm: 0 1px 2px rgba(23,58,120,.06);
    --sh-md: 0 6px 18px rgba(23,58,120,.08);
    --sh-lg: 0 18px 40px rgba(23,58,120,.10);
    --r-card: 16px;
    --r-small: 12px;
    --r-btn: 10px;
    --r-pic: 14px;
  }

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

  html { scroll-behavior: smooth; }

  body {
    margin: 0;
    font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Source Han Sans SC', Inter, system-ui, sans-serif;
    font-size: 16px;
    line-height: 1.85;
    color: var(--ink);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  img { max-width: 100%; display: block; }
  a { color: inherit; text-decoration: none; }
  button { font: inherit; color: inherit; }
  p { margin: 0 0 16px; }
  p:last-child { margin-bottom: 0; }

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

  .container-x {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
  }
  .read-x { max-width: 760px; }

  /* ===================== 导航 ===================== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    padding: 16px 0 0;
    transition: padding .2s ease;
  }
  .nav-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    background: #FFFFFF;
    border-radius: var(--r-card);
    box-shadow: var(--sh-md);
    padding: 10px 14px;
    transition: box-shadow .2s ease, background .2s ease;
  }
  .site-header.is-scrolled .nav-card {
    background: rgba(255,255,255,.96);
    box-shadow: var(--sh-lg);
  }

  .nav-logo { display: inline-flex; align-items: center; gap: 10px; }
  .logo-mark {
    width: 36px; height: 36px;
    border-radius: 10px;
    background: var(--brand);
    color: #fff;
    font-weight: 700;
    font-size: 18px;
    display: grid;
    place-items: center;
    letter-spacing: 0;
    flex: none;
  }
  .logo-text {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--ink);
    white-space: nowrap;
  }

  .nav-links { display: none; align-items: center; gap: 8px; }
  .nav-item {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 12px;
    border-radius: var(--r-small);
    border: 1px solid var(--line);
    background: #FFFFFF;
    font-size: 13.5px;
    font-weight: 500;
    color: var(--ink-2);
    transition: transform .18s ease, border-color .18s ease, background .18s ease, color .18s ease, box-shadow .18s ease;
  }
  .ni-ico {
    width: 22px; height: 22px;
    border-radius: 7px;
    background: #F1F5FC;
    color: var(--ink-3);
    display: grid;
    place-items: center;
    flex: none;
    transition: color .18s ease, background .18s ease;
  }
  .nav-item:hover {
    transform: translateY(-1px);
    border-color: rgba(31,95,216,.35);
    background: var(--brand-soft);
    color: var(--brand);
    box-shadow: var(--sh-sm);
  }
  .nav-item:hover .ni-ico { color: var(--brand); background: #fff; }
  .nav-item.is-active {
    background: var(--brand-soft);
    border-color: var(--brand);
    color: var(--brand);
    font-weight: 600;
  }
  .nav-item.is-active .ni-ico { color: var(--brand); background: #fff; }

  .nav-cta { display: none; }
  .nav-toggle {
    width: 40px; height: 40px;
    border-radius: var(--r-small);
    border: 1px solid var(--line);
    background: #fff;
    display: grid;
    place-items: center;
    cursor: pointer;
    transition: border-color .18s ease, background .18s ease;
  }
  .nav-toggle:hover { border-color: var(--brand); background: var(--brand-soft); }

  .mobile-panel {
    display: none;
    margin-top: 10px;
    background: #fff;
    border-radius: var(--r-card);
    box-shadow: var(--sh-md);
    padding: 14px;
  }
  .mobile-panel.is-open { display: block; animation: panelIn .18s ease both; }
  @keyframes panelIn {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .mp-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
  .mp-item {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    border-radius: var(--r-small);
    border: 1px solid var(--line);
    background: #fff;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink-2);
  }
  .mp-item.is-active {
    background: var(--brand-soft);
    border-color: var(--brand);
    color: var(--brand);
    font-weight: 600;
  }
  .mp-cta { width: 100%; margin-top: 12px; }

  /* ===================== 按钮 ===================== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 46px;
    padding: 0 24px;
    border-radius: var(--r-btn);
    border: 1px solid transparent;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0;
    cursor: pointer;
    white-space: nowrap;
    transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
  }
  .btn-primary {
    background: var(--brand);
    color: #fff;
    box-shadow: var(--sh-sm);
  }
  .btn-primary:hover {
    background: var(--brand-deep);
    transform: translateY(-1px);
    box-shadow: var(--sh-md);
  }
  .btn-primary:active { transform: translateY(0); box-shadow: var(--sh-sm); }

  .btn-secondary {
    background: #fff;
    color: var(--brand);
    border-color: var(--line);
  }
  .btn-secondary:hover {
    border-color: var(--brand);
    background: var(--brand-soft);
  }

  .btn-ghost {
    background: transparent;
    color: var(--brand);
    border: 0;
    height: auto;
    padding: 6px 2px;
    font-size: 14.5px;
  }
  .btn-ghost svg { transition: transform .18s ease; }
  .btn-ghost:hover svg { transform: translateX(2px); }

  .btn-dl {
    background: var(--brand);
    color: #fff;
    box-shadow: var(--sh-sm);
    padding: 0 20px;
  }
  .btn-dl:hover { background: var(--brand-deep); transform: translateY(-1px); box-shadow: var(--sh-md); }
  .btn-ver {
    font-size: 12px;
    font-weight: 500;
    opacity: .78;
    padding-left: 8px;
    border-left: 1px solid rgba(255,255,255,.35);
  }
  .btn-run { position: relative; }
  .btn-run::after {
    content: "";
    position: absolute;
    inset: -2px;
    border-radius: 12px;
    border: 2px solid var(--warm);
    pointer-events: none;
  }

  /* ===================== 版块与卡片 ===================== */
  .sec { padding: 56px 0; }
  .sec-tight { padding: 40px 0 0; }

  .h1 {
    font-size: clamp(30px, 4.4vw, 44px);
    line-height: 1.25;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin: 0 0 14px;
  }
  .h2 {
    font-size: clamp(22px, 2.6vw, 28px);
    line-height: 1.3;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin: 0;
  }
  .h3 {
    font-size: 19px;
    line-height: 1.4;
    font-weight: 600;
    margin: 0 0 8px;
  }
  .lead { font-size: 16.5px; line-height: 1.85; color: var(--ink-2); margin: 0; }
  .meta { font-size: 13px; line-height: 1.9; color: var(--ink-3); margin: 0; }

  .sec-head {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 32px;
  }
  .sec-head .tick {
    display: block;
    width: 40px;
    height: 3px;
    border-radius: 3px;
    background: var(--brand);
    margin-bottom: 14px;
  }

  .card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--r-card);
    padding: 24px;
    transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
  }
  .card:hover { transform: translateY(-2px); box-shadow: var(--sh-md); }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--brand-soft);
    color: var(--brand);
    font-size: 12px;
    font-weight: 600;
    line-height: 1.6;
  }
  .badge-accent { background: rgba(18,179,154,.12); color: #0E8E7B; }
  .dot {
    width: 7px; height: 7px; border-radius: 999px;
    background: var(--accent);
    display: inline-block;
  }
  .ver-chip {
    display: inline-block;
    font-size: 12px;
    color: var(--ink-2);
    background: #F1F5FC;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 2px 8px;
    font-variant-numeric: tabular-nums;
  }

  .ico-box {
    width: 44px; height: 44px;
    border-radius: var(--r-small);
    background: var(--brand-soft);
    color: var(--brand);
    display: grid;
    place-items: center;
    flex: none;
  }

  .img-wrap {
    border-radius: var(--r-pic);
    overflow: hidden;
    background: var(--brand-soft);
    aspect-ratio: 16 / 9;
  }
  .img-wrap img { width: 100%; height: 100%; object-fit: cover; }

  /* ===================== 页头 ===================== */
  .page-hero {
    position: relative;
    padding: 40px 0 8px;
    overflow: hidden;
  }
  .page-hero::before {
    content: "";
    position: absolute;
    top: -80px;
    right: -140px;
    width: 460px;
    height: 320px;
    background: rgba(31,95,216,.05);
    transform: rotate(-14deg);
    border-radius: 48px;
    pointer-events: none;
  }
  .crumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--ink-3);
    margin-bottom: 18px;
  }
  .crumb a:hover { color: var(--brand); text-decoration: underline; text-underline-offset: 4px; }
  .crumb .sep { color: var(--ink-3); }
  .crumb .cur { color: var(--brand); font-weight: 600; }

  .hero-grid {
    display: grid;
    gap: 28px;
    align-items: center;
    position: relative;
  }
  .hero-pic {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--sh-lg);
    background: var(--brand-soft);
  }
  .hero-pic img { width: 100%; height: auto; }
  .hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
  .hero-btns { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }

  /* ===================== 步骤条 ===================== */
  .steps { display: grid; gap: 16px; }
  .step {
    position: relative;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-card);
    padding: 22px;
    transition: transform .16s ease, box-shadow .16s ease;
  }
  .step:hover { transform: translateY(-2px); box-shadow: var(--sh-md); }
  .step-num {
    width: 38px; height: 38px;
    border-radius: 999px;
    background: var(--brand);
    color: #fff;
    font-weight: 700;
    font-size: 15px;
    display: grid;
    place-items: center;
    margin-bottom: 14px;
  }
  .step h3 { font-size: 17px; margin: 0 0 8px; font-weight: 600; }
  .step p { font-size: 14.5px; color: var(--ink-2); line-height: 1.8; margin: 0; }

  /* ===================== 错位图文 ===================== */
  .split-list { display: grid; gap: 24px; }
  .split-item {
    display: grid;
    gap: 20px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-card);
    padding: 22px;
    transition: transform .16s ease, box-shadow .16s ease;
  }
  .split-item:hover { transform: translateY(-2px); box-shadow: var(--sh-md); }
  .split-body h3 { font-size: 19px; margin: 0 0 10px; }
  .split-body p { font-size: 15px; color: var(--ink-2); line-height: 1.85; margin: 0 0 14px; }
  .mini-list { margin: 0; padding: 0; list-style: none; }
  .mini-list li {
    position: relative;
    padding-left: 18px;
    font-size: 14.5px;
    color: var(--ink-2);
    line-height: 1.9;
  }
  .mini-list li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 12px;
    width: 7px; height: 7px;
    border-radius: 999px;
    background: var(--brand);
    opacity: .75;
  }

  /* ===================== 系统要求 ===================== */
  .req-grid { display: grid; gap: 16px; }
  .req-card {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-card);
    padding: 20px;
    transition: transform .16s ease, box-shadow .16s ease;
  }
  .req-card:hover { transform: translateY(-2px); box-shadow: var(--sh-md); }
  .req-label { font-size: 13px; color: var(--ink-3); margin: 0 0 4px; }
  .req-value { font-size: 15.5px; font-weight: 600; color: var(--ink); margin: 0; }

  /* ===================== 下载模块 ===================== */
  .dl-panel {
    background: var(--brand-soft);
    border-radius: var(--r-card);
    padding: 28px;
    box-shadow: var(--sh-lg);
  }
  .dl-actions { display: grid; gap: 12px; margin-top: 22px; }
  .dl-meta { display: flex; flex-wrap: wrap; gap: 8px 20px; margin-top: 18px; font-size: 13px; color: var(--ink-2); }
  .qr-box {
    width: 144px; height: 144px;
    background: #fff;
    border-radius: var(--r-pic);
    border: 1px solid var(--line);
    display: grid;
    place-items: center;
    text-align: center;
    box-shadow: var(--sh-sm);
  }
  .qr-inner {
    font-size: 12px;
    color: var(--ink-2);
    border: 1px dashed rgba(31,95,216,.35);
    border-radius: 8px;
    padding: 10px 12px;
  }

  /* ===================== FAQ ===================== */
  .faq-list { display: grid; gap: 12px; }
  .faq-item {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-small);
    overflow: hidden;
    transition: border-color .18s ease, box-shadow .18s ease;
  }
  .faq-item:hover { border-color: rgba(31,95,216,.35); box-shadow: var(--sh-sm); }
  .faq-q {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 20px;
    background: none;
    border: 0;
    text-align: left;
    font-size: 16.5px;
    font-weight: 600;
    color: var(--ink);
    cursor: pointer;
    line-height: 1.6;
  }
  .faq-icon {
    width: 28px; height: 28px;
    border-radius: 999px;
    background: var(--brand-soft);
    color: var(--brand);
    display: grid;
    place-items: center;
    flex: none;
    transition: transform .2s ease;
  }
  .faq-item.is-open .faq-icon { transform: rotate(45deg); }
  .faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height .22s ease;
  }
  .faq-item.is-open .faq-a { max-height: 520px; }
  .faq-a-inner {
    padding: 0 20px 18px;
    font-size: 15px;
    line-height: 1.85;
    color: var(--ink-2);
  }

  /* ===================== 内链卡 ===================== */
  .link-grid { display: grid; gap: 16px; }
  .link-card {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-card);
    padding: 20px;
    transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
  }
  .link-card:hover { transform: translateY(-2px); box-shadow: var(--sh-md); border-color: rgba(31,95,216,.35); }
  .link-card h3 { font-size: 16.5px; margin: 0 0 6px; font-weight: 600; }
  .link-card p { font-size: 14px; color: var(--ink-2); margin: 0; line-height: 1.8; }

  /* ===================== 收口 CTA ===================== */
  .cta-band {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--r-card);
    padding: 36px 28px;
    text-align: center;
    box-shadow: var(--sh-sm);
  }
  .cta-band .btn { margin-top: 22px; }

  /* ===================== 页脚 ===================== */
  .site-footer {
    background: #F5F8FC;
    border-top: 1px solid var(--line);
    padding: 64px 0 24px;
    margin-top: 72px;
  }
  .footer-grid { display: grid; gap: 32px; }
  .footer-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 12px;
  }
  .footer-link {
    display: block;
    font-size: 13px;
    color: var(--ink-2);
    line-height: 2;
    transition: color .18s ease;
  }
  .footer-link:hover {
    color: var(--brand);
    text-decoration: underline;
    text-underline-offset: 4px;
  }
  .footer-bottom {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 24px;
    justify-content: space-between;
    border-top: 1px solid var(--line);
    margin-top: 40px;
    padding-top: 20px;
    font-size: 13px;
    color: var(--ink-3);
  }

  /* ===================== 响应式 ===================== */
  @media (min-width: 768px) {
    .container-x { padding: 0 32px; }
    .sec { padding: 72px 0; }
    .split-item { grid-template-columns: 1fr 1fr; padding: 26px; }
    .split-item.is-rev .si-media { order: 2; }
    .req-grid { grid-template-columns: 1fr 1fr; }
    .dl-actions { grid-template-columns: 1fr 1fr; }
    .link-grid { grid-template-columns: 1fr 1fr; }
    .steps { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero-grid { grid-template-columns: 1fr 1fr; }
    .page-hero { padding: 56px 0 12px; }
    .cta-band { padding: 48px 40px; }
  }

  @media (min-width: 1024px) {
    .nav-links { display: flex; }
    .nav-cta { display: block; }
    .nav-toggle { display: none; }
    .mobile-panel { display: none !important; }
    .sec { padding: 96px 0; }
    .steps { grid-template-columns: repeat(4, 1fr); gap: 20px; }
    .req-grid { grid-template-columns: 1fr 1fr; }
    .dl-actions { grid-template-columns: repeat(3, 1fr); }
    .link-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px; }
    .faq-list { grid-template-columns: 1fr; }
  }

  @media (max-width: 767px) {
    .hero-btns .btn { width: 100%; }
    .dl-actions .btn { width: 100%; height: 48px; }
    .split-item { grid-template-columns: 1fr; }
    .split-item.is-rev .si-media { order: 0; }
  }

  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
      animation-duration: .001ms !important;
      transition-duration: .001ms !important;
      scroll-behavior: auto !important;
    }
  }

/* roulang page: category3 */
:root{
    --brand:#1F5FD8;
    --brand-dark:#16408F;
    --brand-light:#E8EFFD;
    --accent:#12B39A;
    --warm:#FF8A3D;
    --page:#F5F8FC;
    --card:#FFFFFF;
    --line:#E3EAF4;
    --ink:#1B2A41;
    --muted:#5C6E88;
    --disabled:#93A3B8;
    --r-lg:16px;
    --r-md:12px;
    --r-btn:10px;
    --r-img:14px;
    --sh-sm:0 1px 2px rgba(23,58,120,.06);
    --sh-md:0 6px 18px rgba(23,58,120,.08);
    --sh-lg:0 18px 40px rgba(23,58,120,.10);
    --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",Inter,system-ui,-apple-system,sans-serif;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:var(--font);
    background:var(--page);
    color:var(--ink);
    font-size:16px;
    line-height:1.85;
    letter-spacing:0;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-radius:var(--r-img);background:#EDF2FA;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;cursor:pointer;}
  h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em;font-weight:700;}
  p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}

  .container-x{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding-left:20px;
    padding-right:20px;
  }

  /* ---------- 头部导航卡 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    padding:16px 0 0;
    transition:padding .2s ease;
  }
  .site-header.is-scrolled{padding-top:10px;}
  .nav-card{
    display:flex;
    align-items:center;
    gap:14px;
    background:#fff;
    border-radius:var(--r-lg);
    box-shadow:var(--sh-sm);
    padding:12px 16px;
    transition:box-shadow .2s ease, background .2s ease;
  }
  .site-header.is-scrolled .nav-card{
    box-shadow:var(--sh-md);
    background:rgba(255,255,255,.96);
  }
  .nav-logo{
    display:flex;
    align-items:center;
    gap:10px;
    font-weight:700;
    color:var(--ink);
    flex-shrink:0;
  }
  .logo-mark{
    width:36px;height:36px;
    border-radius:11px;
    background:var(--brand);
    color:#fff;
    display:grid;place-items:center;
    font-size:17px;font-weight:700;
    box-shadow:0 4px 10px rgba(31,95,216,.28);
    flex-shrink:0;
  }
  .logo-text{
    font-size:17px;
    letter-spacing:-.01em;
    white-space:nowrap;
  }
  .nav-links{
    display:flex;
    align-items:center;
    gap:8px;
    margin-left:auto;
  }
  .nav-item{
    display:flex;
    align-items:center;
    gap:7px;
    padding:9px 12px;
    border-radius:var(--r-md);
    border:1px solid var(--line);
    font-size:14px;
    color:var(--muted);
    font-weight:500;
    white-space:nowrap;
    transition:background .16s ease,color .16s ease,border-color .16s ease,transform .16s ease;
  }
  .nav-item:hover{
    background:var(--brand-light);
    color:var(--brand);
    border-color:#C9DAFA;
    transform:translateY(-1px);
  }
  .nav-item.is-active{
    background:var(--brand-light);
    color:var(--brand);
    border-color:#B9CFF8;
    font-weight:600;
  }
  .ni-ico{
    width:22px;height:22px;
    border-radius:7px;
    background:var(--brand-light);
    color:var(--brand);
    display:grid;place-items:center;
    flex-shrink:0;
    transition:background .16s ease;
  }
  .nav-item.is-active .ni-ico{background:#fff;}
  .nav-cta{display:flex;align-items:center;flex-shrink:0;}
  .nav-toggle{
    display:none;
    width:40px;height:40px;
    border-radius:12px;
    border:1px solid var(--line);
    background:#fff;
    align-items:center;justify-content:center;
    transition:border-color .16s ease,background .16s ease;
  }
  .nav-toggle:hover{border-color:var(--brand);background:var(--brand-light);}

  .mobile-panel{
    display:none;
    margin-top:10px;
    background:#fff;
    border-radius:var(--r-lg);
    box-shadow:var(--sh-md);
    padding:14px;
    opacity:0;
    transform:translateY(-6px);
    transition:opacity .18s ease,transform .18s ease;
  }
  .mobile-panel.is-open{display:block;opacity:1;transform:translateY(0);}
  .mp-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:10px;
  }
  .mp-item{
    display:flex;align-items:center;
    min-height:46px;
    padding:10px 14px;
    border-radius:var(--r-md);
    border:1px solid var(--line);
    font-size:14.5px;
    color:var(--muted);
    background:#fff;
  }
  .mp-item.is-active{
    background:var(--brand-light);
    color:var(--brand);
    border-color:#B9CFF8;
    font-weight:600;
  }
  .mp-cta{
    display:flex;align-items:center;justify-content:center;
    width:100%;margin-top:12px;min-height:48px;
  }

  /* ---------- 按钮体系 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    border-radius:var(--r-btn);
    font-size:15px;
    font-weight:600;
    border:1px solid transparent;
    padding:0 24px;
    min-height:46px;
    transition:transform .16s ease,box-shadow .16s ease,background .16s ease,border-color .16s ease,color .16s ease;
  }
  .btn-primary{
    background:var(--brand);
    color:#fff;
    box-shadow:0 4px 12px rgba(31,95,216,.22);
  }
  .btn-primary:hover{
    background:var(--brand-dark);
    transform:translateY(-1px);
    box-shadow:var(--sh-md);
  }
  .btn-primary:active{transform:translateY(0);box-shadow:var(--sh-sm);}
  .btn-outline{
    background:#fff;
    color:var(--brand);
    border-color:var(--line);
  }
  .btn-outline:hover{
    border-color:var(--brand);
    background:var(--brand-light);
    transform:translateY(-1px);
  }
  .btn-outline:active{transform:translateY(0);}
  .btn-ghost{
    background:transparent;
    color:var(--brand);
    padding:0 6px;
    min-height:36px;
    font-weight:600;
  }
  .btn-ghost .arrow{transition:transform .16s ease;}
  .btn-ghost:hover .arrow{transform:translateX(3px);}
  .btn-warm{
    background:#fff;
    color:var(--brand-dark);
    border:1.5px solid var(--warm);
    box-shadow:0 4px 12px rgba(255,138,61,.16);
  }
  .btn-warm:hover{background:#FFF4EC;transform:translateY(-1px);}
  .btn-block{width:100%;}
  .btn-sm{font-size:14px;min-height:40px;padding:0 18px;}
  .btn:focus-visible,
  .nav-item:focus-visible,
  .nav-toggle:focus-visible,
  .footer-link:focus-visible,
  .faq summary:focus-visible,
  .link-card:focus-visible{
    outline:2px solid var(--brand);
    outline-offset:2px;
  }

  /* ---------- 通用板块 ---------- */
  .section{padding:88px 0;}
  .section-tight{padding:64px 0;}
  .section-head{
    display:flex;
    align-items:flex-end;
    justify-content:space-between;
    gap:20px;
    margin-bottom:34px;
  }
  .h2{
    font-size:28px;
    font-weight:700;
    color:var(--ink);
  }
  .h3{font-size:19px;font-weight:700;}
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:7px;
    font-size:12.5px;
    font-weight:600;
    color:var(--brand);
    background:var(--brand-light);
    border-radius:999px;
    padding:5px 13px;
    margin-bottom:16px;
  }
  .dot{
    width:7px;height:7px;border-radius:50%;
    background:var(--accent);
    display:inline-block;
  }
  .lead{color:var(--muted);font-size:16.5px;line-height:1.85;}
  .meta{color:var(--muted);font-size:13px;line-height:1.9;}
  .rule{
    width:40px;height:3px;border-radius:3px;background:var(--brand);
    margin-top:14px;
  }

  /* ---------- 面包屑 + 页头 ---------- */
  .breadcrumb{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--muted);
    padding-top:26px;
  }
  .breadcrumb a{color:var(--muted);}
  .breadcrumb a:hover{color:var(--brand);}
  .breadcrumb .sep{color:#C6D2E4;}
  .breadcrumb .current{color:var(--brand);font-weight:600;}

  .pagehead{
    display:grid;
    grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
    gap:44px;
    align-items:center;
    padding:40px 0 84px;
  }
  .pagehead h1{
    font-size:44px;
    line-height:1.2;
    margin-bottom:16px;
  }
  .pagehead h1 .hl{color:var(--brand);}
  .pagehead-media{
    position:relative;
    border-radius:20px;
    overflow:hidden;
    box-shadow:var(--sh-lg);
  }
  .pagehead-media img{
    width:100%;
    height:340px;
    object-fit:cover;
    border-radius:20px;
  }
  .float-tip{
    position:absolute;
    left:18px;
    bottom:18px;
    background:#fff;
    border-radius:var(--r-md);
    box-shadow:var(--sh-md);
    padding:12px 16px;
    display:flex;
    align-items:center;
    gap:12px;
  }
  .float-tip strong{font-size:15px;color:var(--ink);}
  .hero-stats{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-top:22px;
  }
  .chip{
    display:inline-flex;
    align-items:center;
    gap:7px;
    font-size:13px;
    color:var(--muted);
    background:#fff;
    border:1px solid var(--line);
    border-radius:999px;
    padding:6px 14px;
  }

  /* ---------- FAQ 双列手风琴 ---------- */
  .faq-columns{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:16px;
    align-items:start;
  }
  .faq-col{
    display:flex;
    flex-direction:column;
    gap:12px;
  }
  .faq{
    background:#fff;
    border-radius:var(--r-md);
    border:1px solid var(--line);
    box-shadow:var(--sh-sm);
    transition:box-shadow .16s ease,border-color .16s ease;
  }
  .faq:hover{box-shadow:var(--sh-md);border-color:#D3DFF2;}
  .faq[open]{border-color:#C9DAFA;}
  .faq summary{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:14px;
    padding:16px 18px;
    cursor:pointer;
    list-style:none;
    font-size:16.5px;
    font-weight:600;
    color:var(--ink);
    line-height:1.55;
  }
  .faq summary::-webkit-details-marker{display:none;}
  .faq summary::marker{content:"";}
  .plus{
    width:28px;height:28px;
    border-radius:50%;
    background:var(--brand-light);
    color:var(--brand);
    display:grid;place-items:center;
    flex-shrink:0;
    transition:transform .18s ease,background .18s ease,color .18s ease;
  }
  .faq[open] .plus{
    transform:rotate(45deg);
    background:var(--brand);
    color:#fff;
  }
  .faq-answer{
    padding:0 18px 16px;
    font-size:15px;
    line-height:1.8;
    color:var(--muted);
  }
  .faq-tag{
    display:inline-block;
    font-size:11.5px;
    color:var(--brand);
    background:var(--brand-light);
    border-radius:999px;
    padding:3px 10px;
    margin-bottom:10px;
  }

  /* ---------- 联系卡 ---------- */
  .help-card{
    display:flex;
    align-items:center;
    gap:22px;
    background:var(--brand-light);
    border-radius:var(--r-lg);
    padding:28px 30px;
    box-shadow:var(--sh-sm);
  }
  .help-icon{
    width:56px;height:56px;
    border-radius:16px;
    background:#fff;
    color:var(--brand);
    display:grid;place-items:center;
    flex-shrink:0;
    box-shadow:var(--sh-sm);
  }

  /* ---------- 内链卡片 ---------- */
  .link-grid{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:22px;
  }
  .link-card{
    display:flex;
    flex-direction:column;
    background:#fff;
    border-radius:var(--r-lg);
    border:1px solid var(--line);
    box-shadow:var(--sh-sm);
    overflow:hidden;
    transition:transform .16s ease,box-shadow .16s ease;
  }
  .link-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);}
  .link-card img{width:100%;height:172px;object-fit:cover;border-radius:0;}
  .link-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    align-self:flex-start;
    font-size:11.5px;
    font-weight:600;
    color:var(--brand);
    background:var(--brand-light);
    border-radius:999px;
    padding:4px 11px;
  }
  .link-card .go{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:14px;
    font-weight:600;
    color:var(--brand);
    margin-top:auto;
  }
  .link-card .go .arrow{transition:transform .16s ease;}
  .link-card:hover .go .arrow{transform:translateX(3px);}

  /* ---------- 下载区 ---------- */
  .dl-band{
    position:relative;
    border-radius:var(--r-lg);
    overflow:hidden;
    background:#fff;
    box-shadow:var(--sh-lg);
    border:1px solid #DDE7F6;
  }
  .dl-band::before{
    content:"";
    position:absolute;
    inset:0;
    background-image:url('/assets/images/backpic/back-3.webp');
    background-size:cover;
    background-position:center;
    opacity:.06;
    pointer-events:none;
  }
  .dl-inner{
    position:relative;
    display:grid;
    grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);
    gap:36px;
    padding:44px 44px;
    background:rgba(232,239,253,.72);
  }
  .dl-buttons{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    margin-top:24px;
  }
  .dl-meta{
    display:flex;
    flex-wrap:wrap;
    gap:8px 20px;
    margin-top:20px;
    font-size:13px;
    color:var(--muted);
  }
  .qr-box{
    display:grid;
    place-items:center;
    background:#fff;
    border-radius:var(--r-img);
    border:1px solid var(--line);
    box-shadow:var(--sh-sm);
  }
  .qr-inner{
    display:grid;
    place-items:center;
    width:100%;height:100%;
    border:1px dashed #C9DAFA;
    border-radius:10px;
    color:var(--brand);
    font-weight:600;
    text-align:center;
  }

  /* ---------- 页脚 ---------- */
  .site-footer{
    background:#fff;
    border-top:1px solid var(--line);
    padding:64px 0 28px;
    margin-top:24px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.4fr 1fr 1fr 1.2fr;
    gap:32px;
  }
  .footer-title{
    font-size:14px;
    font-weight:700;
    color:var(--ink);
    margin-bottom:14px;
  }
  .footer-link{
    display:block;
    font-size:13px;
    color:var(--muted);
    line-height:2;
    transition:color .16s ease;
  }
  .footer-link:hover{
    color:var(--brand);
    text-decoration:underline;
    text-underline-offset:3px;
  }
  .footer-bottom{
    display:flex;
    flex-wrap:wrap;
    gap:10px 24px;
    justify-content:space-between;
    align-items:center;
    margin-top:44px;
    padding-top:20px;
    border-top:1px solid var(--line);
    font-size:12.5px;
    color:var(--muted);
  }

  /* ---------- 响应式 ---------- */
  @media (max-width:1024px){
    .nav-links{display:none;}
    .nav-cta{display:none;}
    .nav-toggle{display:flex;margin-left:auto;}
    .pagehead{grid-template-columns:1fr;gap:30px;padding:30px 0 64px;}
    .pagehead h1{font-size:34px;}
    .pagehead-media img{height:280px;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
    .link-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
    .dl-inner{grid-template-columns:1fr;padding:32px;}
  }
  @media (max-width:860px){
    .faq-columns{grid-template-columns:1fr;}
  }
  @media (max-width:768px){
    body{font-size:16px;}
    .section{padding:64px 0;}
    .section-tight{padding:52px 0;}
    .h2{font-size:22px;}
    .h3{font-size:17px;}
    .pagehead h1{font-size:30px;}
    .pagehead media img{height:230px;}
    .pagehead-media img{height:230px;}
    .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:26px;}
    .help-card{flex-direction:column;align-items:flex-start;text-align:left;padding:24px;}
  }
  @media (max-width:520px){
    .container-x{padding-left:16px;padding-right:16px;}
    .nav-card{padding:10px 12px;gap:10px;}
    .logo-text{font-size:15.5px;}
    .footer-grid{grid-template-columns:1fr;}
    .link-grid{grid-template-columns:1fr;}
    .dl-buttons .btn{width:100%;}
    .dl-meta{gap:6px 14px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
    .faq summary{font-size:15.5px;padding:14px 15px;}
    .faq-answer{padding:0 15px 14px;}
  }
  @media (prefers-reduced-motion:reduce){
    *{transition:none !important;animation:none !important;scroll-behavior:auto !important;}
  }

/* roulang page: category2 */
:root{
  --brand:#1F5FD8;
  --brand-deep:#16408F;
  --brand-soft:#E8EFFD;
  --accent:#12B39A;
  --warm:#FF8A3D;
  --bg:#F5F8FC;
  --card:#FFFFFF;
  --line:#E3EAF4;
  --ink:#1B2A41;
  --ink-2:#5C6E88;
  --ink-3:#93A3B8;
  --r-lg:16px;
  --r-md:12px;
  --r-btn:10px;
  --r-img:14px;
  --sh-1:0 1px 2px rgba(23,58,120,.06);
  --sh-2:0 6px 18px rgba(23,58,120,.08);
  --sh-3:0 18px 40px rgba(23,58,120,.10);
  --ease:180ms cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",Inter,system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:none}
h1,h2,h3,h4{margin:0;letter-spacing:-0.01em;line-height:1.25;font-weight:700;color:var(--ink)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

.container-x{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container-x{padding:0 32px}}

/* ---------- 头部导航卡 ---------- */
.site-header{position:sticky;top:0;z-index:80;padding:16px 0 8px;transition:box-shadow var(--ease)}
.nav-card{
  display:flex;align-items:center;gap:14px;
  background:rgba(255,255,255,.96);
  border-radius:var(--r-lg);
  box-shadow:var(--sh-2);
  padding:10px 14px;
  transition:box-shadow var(--ease),background var(--ease);
}
.site-header.is-scrolled .nav-card{box-shadow:var(--sh-3);background:rgba(255,255,255,.98)}
.nav-logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.logo-mark{
  width:36px;height:36px;border-radius:var(--r-btn);
  background:var(--brand);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:700;flex:0 0 auto;
}
.logo-text{font-size:16px;font-weight:700;color:var(--ink);letter-spacing:-0.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:8px;margin-left:auto}
.nav-item{
  display:inline-flex;align-items:center;gap:6px;
  height:44px;padding:0 14px;
  border-radius:var(--r-md);
  border:1px solid transparent;
  color:var(--ink-2);font-size:14px;font-weight:500;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease);
  white-space:nowrap;
}
.nav-item:hover{background:var(--brand-soft);color:var(--brand);border-color:#D3E0FA;transform:translateY(-1px)}
.nav-item.is-active{background:var(--brand-soft);color:var(--brand-deep);border-color:#BBD2F7;font-weight:600}
.ni-ico{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;color:currentColor}
.nav-cta{margin-left:8px;flex:0 0 auto}
.nav-toggle{
  display:none;width:40px;height:40px;flex:0 0 auto;
  align-items:center;justify-content:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-btn);
  transition:var(--ease);
}
.nav-toggle:hover{border-color:var(--brand);background:var(--brand-soft)}
.mobile-panel{
  display:none;background:#fff;border-radius:var(--r-lg);
  box-shadow:var(--sh-2);padding:14px;margin-top:10px;
}
.mobile-panel.is-open{display:block;animation:panelIn 180ms ease-out}
@keyframes panelIn{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}
.mp-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.mp-item{
  display:flex;align-items:center;justify-content:center;
  min-height:44px;padding:6px 10px;text-align:center;
  border:1px solid var(--line);border-radius:var(--r-md);
  font-size:14px;color:var(--ink-2);background:#fff;
}
.mp-item:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.mp-item.is-active{background:var(--brand-soft);border-color:#BBD2F7;color:var(--brand-deep);font-weight:600}
.mp-cta{display:flex;justify-content:center;margin-top:12px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border:none;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;
  transition:background var(--ease),color var(--ease),border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:var(--sh-1)}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--sh-1)}
.btn-secondary{background:#fff;color:var(--brand);border:1px solid var(--line)}
.btn-secondary:hover{border-color:var(--brand);background:var(--brand-soft);transform:translateY(-1px)}
.btn-secondary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--brand);padding:0 4px;height:auto;font-weight:600}
.btn-ghost .arw{transition:transform var(--ease)}
.btn-ghost:hover .arw{transform:translateX(2px)}

/* ---------- 页头 ---------- */
.page-head{
  position:relative;overflow:hidden;
  padding:28px 0 56px;
}
.page-head::before{
  content:"";position:absolute;top:-120px;right:-140px;
  width:520px;height:420px;background:var(--brand);opacity:.05;
  transform:rotate(-16deg);border-radius:48px;pointer-events:none;
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--ink-3);position:relative;z-index:1}
.crumb a{color:var(--ink-3)}
.crumb a:hover{color:var(--brand)}
.crumb .sep{color:#C6D3E6}
.crumb .current{color:var(--brand);font-weight:600}
.page-hero{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center;
  margin-top:24px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--brand-soft);color:var(--brand-deep);
  font-size:12px;font-weight:600;letter-spacing:.02em;
  padding:5px 12px;border-radius:999px;
}
.page-title{font-size:44px;margin:18px 0 14px;letter-spacing:-0.02em}
.page-title em{font-style:normal;color:var(--brand-deep)}
.page-sub{font-size:17px;color:var(--ink-2);max-width:560px}
.head-meta{margin-top:14px;font-size:13px;color:var(--ink-3)}
.head-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:16/10;object-fit:cover;
  border-radius:calc(var(--r-lg) + 4px);box-shadow:var(--sh-3);
}
.float-chip{
  position:absolute;left:-14px;bottom:-18px;
  background:#fff;border-radius:var(--r-md);box-shadow:var(--sh-2);
  padding:12px 16px;display:flex;align-items:center;gap:12px;
}
.float-chip .fc-num{font-size:20px;font-weight:700;color:var(--brand-deep);line-height:1.2}
.float-chip .fc-label{font-size:12px;color:var(--ink-3)}

/* ---------- 数据条 ---------- */
.stat-row{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:16px;margin-top:44px;position:relative;z-index:1;
}
.stat-chip{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);padding:16px 18px;transition:var(--ease);
}
.stat-chip:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.stat-chip .sc-label{font-size:12.5px;color:var(--ink-3)}
.stat-chip .sc-value{font-size:17px;font-weight:700;color:var(--ink);margin-top:4px}
.stat-chip .sc-value span{font-size:13px;font-weight:500;color:var(--ink-2)}

/* ---------- 通用板块 ---------- */
.sec{padding:80px 0}
.sec.tight{padding-top:0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:34px}
.sec-head h2{font-size:28px}
.sec-head h2::before{
  content:"";display:block;width:40px;height:3px;border-radius:2px;
  background:var(--brand);margin-bottom:14px;
}
.sec-desc{font-size:15px;color:var(--ink-2);max-width:640px;margin-top:10px}

/* ---------- 左右分栏 ---------- */
.split{display:grid;grid-template-columns:250px minmax(0,1fr);gap:40px;align-items:start}
.toc{
  position:sticky;top:96px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:20px;
}
.toc-title{font-size:13px;font-weight:700;color:var(--ink-3);letter-spacing:.04em;margin-bottom:12px}
.toc-link{
  display:flex;align-items:center;gap:8px;
  padding:9px 10px;border-radius:var(--r-btn);
  font-size:14px;color:var(--ink-2);transition:var(--ease);
}
.toc-link::before{content:"";width:6px;height:6px;border-radius:50%;background:#C6D3E6;flex:0 0 auto;transition:var(--ease)}
.toc-link:hover{background:var(--brand-soft);color:var(--brand)}
.toc-link:hover::before{background:var(--brand)}
.toc-link.is-current{background:var(--brand-soft);color:var(--brand-deep);font-weight:600}
.toc-link.is-current::before{background:var(--warm)}

/* ---------- 时间轴 ---------- */
.tl-block{margin-bottom:12px}
.tl-block > h2{font-size:28px;margin-bottom:8px}
.tl-block > p{font-size:15px;color:var(--ink-2);margin-bottom:28px}
.timeline{position:relative;padding-left:28px}
.timeline::before{
  content:"";position:absolute;left:6px;top:10px;bottom:26px;width:2px;
  background:var(--line);border-radius:2px;
}
.tl-item{position:relative;margin-bottom:22px}
.tl-dot{
  position:absolute;left:-28px;top:16px;width:14px;height:14px;border-radius:50%;
  background:#fff;border:3px solid #C6D3E6;box-sizing:border-box;
}
.tl-item.is-latest .tl-dot{border-color:var(--warm)}
.tl-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:20px 22px;
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.tl-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D6E2F6}
.tl-tags{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-bottom:10px}
.badge-date{
  display:inline-flex;align-items:center;
  background:var(--brand-soft);color:var(--brand-deep);
  font-size:12px;font-weight:600;padding:4px 11px;border-radius:999px;
}
.badge-ver{
  display:inline-flex;align-items:center;
  background:#F1F5FB;color:var(--ink-2);
  font-size:12px;font-weight:600;letter-spacing:.02em;
  padding:4px 10px;border-radius:8px;
}
.badge-now{
  display:inline-flex;align-items:center;gap:5px;
  background:#FFF2E8;color:#B95A16;
  font-size:12px;font-weight:600;padding:4px 11px;border-radius:999px;
}
.badge-now i{width:6px;height:6px;border-radius:50%;background:var(--warm);display:inline-block}
.tl-card h3{font-size:19px;margin-bottom:8px}
.tl-card p{font-size:15px;color:var(--ink-2);line-height:1.85}
.tl-figure{margin-top:14px}
.tl-figure img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-img)}
.tl-figure figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:8px}
.tl-foot{margin-top:14px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.tl-foot .meta{font-size:13px;color:var(--ink-3)}
.arrow-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--brand)}
.arrow-link .arw{transition:transform var(--ease)}
.arrow-link:hover .arw{transform:translateX(2px)}

/* ---------- 检查清单卡片 ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.plain-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:22px;transition:transform var(--ease),box-shadow var(--ease);
}
.plain-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2)}
.card-ico{
  width:40px;height:40px;border-radius:var(--r-btn);background:var(--brand-soft);
  display:inline-flex;align-items:center;justify-content:center;color:var(--brand);
  margin-bottom:14px;
}
.plain-card h3{font-size:17px;margin-bottom:8px}
.plain-card p{font-size:15px;color:var(--ink-2)}
.plain-card ul{margin-top:10px}
.plain-card li{
  position:relative;padding-left:16px;font-size:14.5px;color:var(--ink-2);line-height:2;
}
.plain-card li::before{
  content:"";position:absolute;left:0;top:13px;width:6px;height:6px;border-radius:50%;background:var(--brand);
}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:860px}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);overflow:hidden;transition:box-shadow var(--ease),border-color var(--ease);
}
.faq-item:hover{box-shadow:var(--sh-2)}
.faq-item[open]{border-color:#D6E2F6}
.faq-q{
  display:flex;align-items:center;gap:16px;justify-content:space-between;
  padding:16px 18px;font-size:16.5px;font-weight:600;color:var(--ink);
  list-style:none;cursor:pointer;
}
.faq-q::-webkit-details-marker{display:none}
.plus{
  width:28px;height:28px;flex:0 0 auto;border-radius:50%;
  background:var(--brand-soft);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;
  font-size:17px;line-height:1;transition:transform var(--ease);
}
.faq-item[open] .plus{transform:rotate(45deg)}
.faq-a{padding:2px 18px 16px;font-size:15px;color:var(--ink-2);line-height:1.8;max-width:760px}

/* ---------- 下载卡与说明 ---------- */
.dl-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);padding:22px 24px;display:flex;gap:18px;align-items:flex-start;
}
.dl-card h3{font-size:17px;margin-bottom:8px}
.dl-card p{font-size:15px;color:var(--ink-2)}
.dl-time{font-size:13px;color:var(--ink-3);margin-top:10px}

.dl-panel{
  margin-top:28px;background:var(--brand-soft);border:1px solid #D3E0FA;
  border-radius:var(--r-lg);box-shadow:var(--sh-3);padding:32px;
}
.dl-panel-head{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.dl-panel h2{font-size:24px}
.dl-panel .meta{font-size:13.5px;color:var(--ink-2);margin-top:8px}
.dl-group{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;align-items:center}
.dl-btn{
  display:inline-flex;align-items:center;gap:10px;
  height:48px;padding:0 22px;border-radius:var(--r-btn);
  background:#fff;border:1px solid var(--line);color:var(--ink);
  font-size:15px;font-weight:600;box-shadow:var(--sh-1);
  transition:var(--ease);
}
.dl-btn:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-1px);box-shadow:var(--sh-2)}
.dl-btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.dl-btn.primary:hover{background:var(--brand-deep);border-color:var(--brand-deep);color:#fff}
.dl-btn .ver{font-size:12px;font-weight:500;color:var(--ink-3)}
.dl-btn.primary .ver{color:rgba(255,255,255,.78)}
.qr-card{
  width:144px;background:#fff;border-radius:var(--r-md);box-shadow:var(--sh-1);
  padding:12px;text-align:center;margin-left:auto;
}
.qr-card .qr-box{
  width:100%;height:96px;border-radius:var(--r-btn);
  border:1px dashed var(--line);background:#F8FAFE;
  display:flex;align-items:center;justify-content:center;
  font-size:12px;color:var(--ink-3);
}
.qr-card .qr-cap{font-size:12px;color:var(--ink-3);margin-top:8px}

/* ---------- 内链带 ---------- */
.link-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.link-card{
  display:flex;align-items:center;gap:14px;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--sh-1);padding:16px 18px;transition:var(--ease);
}
.link-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D6E2F6}
.link-card .lc-ico{
  width:38px;height:38px;flex:0 0 auto;border-radius:var(--r-btn);
  background:var(--brand-soft);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;
}
.link-card .lc-title{font-size:15.5px;font-weight:600;color:var(--ink)}
.link-card .lc-desc{font-size:13px;color:var(--ink-3);margin-top:2px}
.link-card .lc-arw{margin-left:auto;color:var(--brand);font-size:16px;transition:transform var(--ease)}
.link-card:hover .lc-arw{transform:translateX(2px)}

/* ---------- 页脚 ---------- */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:64px 0 26px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:34px}
.footer-title{font-size:14px;font-weight:700;color:var(--ink);margin-bottom:12px}
.footer-link{display:block;font-size:13px;color:var(--ink-2);line-height:2;transition:var(--ease)}
.footer-link:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px}
.footer-bottom{
  margin-top:42px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:var(--ink-3);
}
.lead{color:var(--ink-2);line-height:1.85}
.meta{font-size:13px;color:var(--ink-3)}
.mt-4{margin-top:16px}
.qr-box{
  border:1px dashed var(--line);border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;background:#F8FAFE;
}
.qr-inner{color:var(--ink-3);text-align:center}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .stat-row{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .page-title{font-size:36px}
}
@media (max-width:980px){
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:inline-flex}
  .split{grid-template-columns:1fr;gap:28px}
  .toc{position:static;order:2}
  .split-main{order:1}
  .page-hero{grid-template-columns:1fr;gap:28px}
  .hero-visual{order:-1}
  .float-chip{left:12px;bottom:-14px}
  .link-cards{grid-template-columns:1fr}
}
@media (max-width:768px){
  .sec{padding:56px 0}
  .sec-head h2,.tl-block > h2{font-size:22px}
  .page-title{font-size:30px}
  .grid-2{grid-template-columns:1fr}
  .dl-panel{padding:24px 20px}
  .dl-group{flex-direction:column;align-items:stretch}
  .dl-btn{width:100%;justify-content:center}
  .qr-card{margin:4px auto 0}
  .dl-card{flex-direction:column}
}
@media (max-width:520px){
  .stat-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .mp-grid{grid-template-columns:1fr}
  .timeline{padding-left:22px}
  .timeline::before{left:5px}
  .tl-dot{left:-22px;width:12px;height:12px}
  .faq-q{font-size:15.5px}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}