/* roulang page: index */
:root{
    --brand:#1F5F8B;
    --brand-dark:#17496B;
    --brand-soft:#E8F0F6;
    --celt:#2E8B7A;
    --celt-soft:#E6F3F0;
    --warm:#D97745;
    --warm-soft:#FBEDE5;
    --bg:#F8FAFC;
    --card:#FFFFFF;
    --ink:#0F172A;
    --muted:#475569;
    --line:#E2E8F0;
    --radius-card:16px;
    --radius-btn:10px;
    --shadow-sm:0 4px 12px rgba(15,23,42,.05);
    --shadow-md:0 8px 20px rgba(15,23,42,.07);
    --shadow-lg:0 12px 24px rgba(31,95,139,.12);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:'PingFang SC','Microsoft YaHei','Noto Sans CJK SC','Hiragino Sans GB',system-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;transition:color .2s ease,opacity .2s ease;}
  button,input,select,textarea{font:inherit;color:inherit;}
  h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;color:var(--ink);}
  p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}

  .container-x{width:100%;max-width:1280px;margin:0 auto;padding-left:16px;padding-right:16px;}
  @media (min-width:768px){.container-x{padding-left:24px;padding-right:24px;}}
  @media (min-width:1024px){.container-x{padding-left:32px;padding-right:32px;}}

  .h1{font-size:clamp(2rem,4vw,3.25rem);line-height:1.15;}
  .h2{font-size:clamp(1.5rem,2.5vw,2rem);line-height:1.25;}
  .h3{font-size:1.25rem;line-height:1.4;}
  .lead{font-size:17px;line-height:1.8;color:var(--muted);}
  .small{font-size:14px;line-height:1.6;color:var(--muted);}

  /* 顶部导航 */
  .site-header{position:sticky;top:0;z-index:50;}
  .brand-row{background:#fff;border-bottom:1px solid var(--line);}
  .channel-row{background:#F8FAFC;border-bottom:1px solid var(--line);}
  .brand-mark{
    display:inline-flex;align-items:center;justify-content:center;
    width:40px;height:40px;border-radius:12px;
    background:linear-gradient(135deg,#1F5F8B 0%,#2E8B7A 100%);
    color:#fff;font-weight:700;font-size:15px;letter-spacing:.5px;
  }
  .channel-link{
    position:relative;display:inline-block;white-space:nowrap;
    padding:12px 16px;font-size:15px;color:var(--muted);border-bottom:2px solid transparent;
    transition:color .2s ease,background-color .2s ease,border-color .2s ease;
  }
  .channel-link:hover{color:var(--brand);background:#EFF5F9;}
  .channel-link.is-active{color:var(--brand);border-bottom-color:var(--brand);background:#EFF5F9;font-weight:600;}
  .channel-scroll{display:flex;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none;}
  .channel-scroll::-webkit-scrollbar{display:none;}
  .top-search{
    border:1px solid var(--line);border-radius:999px;padding:8px 14px;font-size:14px;
    background:#fff;min-width:170px;transition:border-color .2s ease,box-shadow .2s ease;outline:none;
  }
  .top-search:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,95,139,.15);}

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:var(--radius-btn);padding:12px 22px;font-weight:600;font-size:15px;
    border:1px solid transparent;cursor:pointer;transition:all .22s ease;
  }
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 14px rgba(31,95,139,.22);}
  .btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);}
  .btn-outline{background:#fff;color:var(--brand);border-color:rgba(31,95,139,.45);}
  .btn-outline:hover{background:var(--brand-soft);border-color:var(--brand);}
  .btn-warm{background:var(--warm);color:#fff;box-shadow:0 6px 14px rgba(217,119,69,.24);}
  .btn-warm:hover{background:#C4673A;transform:translateY(-1px);}
  .btn-ghost{background:#fff;color:var(--muted);border-color:var(--line);}
  .btn-ghost:hover{color:var(--brand);border-color:rgba(31,95,139,.4);}
  .btn:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
    outline:none;box-shadow:0 0 0 3px rgba(31,95,139,.28);
  }

  /* 徽章 / 标签 */
  .badge{display:inline-flex;align-items:center;gap:6px;border-radius:999px;padding:5px 12px;font-size:13px;font-weight:600;}
  .badge-brand{background:var(--brand-soft);color:var(--brand);}
  .badge-celt{background:var(--celt-soft);color:var(--celt);}
  .badge-warm{background:var(--warm-soft);color:#B45C33;}
  .badge-line{background:#fff;border:1px solid var(--line);color:var(--muted);}

  /* Hero */
  .hero{
    position:relative;
    background-image:linear-gradient(180deg,rgba(248,250,252,.95) 0%,rgba(248,250,252,.82) 45%,rgba(248,250,252,.97) 100%),url('/assets/images/backpic/back-1.png');
    background-size:cover;background-position:center;
    border-bottom:1px solid var(--line);
    overflow:hidden;
  }
  .hero::after{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:radial-gradient(rgba(31,95,139,.14) 1px, transparent 1px);
    background-size:26px 26px;opacity:.35;
  }
  .hero-inner{position:relative;z-index:2;}
  .hero-visual{
    position:relative;border-radius:20px;overflow:hidden;
    border:1px solid var(--line);background:#fff;box-shadow:var(--shadow-md);
  }
  .hero-visual img{width:100%;height:340px;object-fit:cover;}
  .hero-float{
    position:absolute;left:16px;right:16px;bottom:16px;background:rgba(255,255,255,.96);
    border:1px solid var(--line);border-radius:14px;padding:14px 16px;box-shadow:var(--shadow-sm);
    display:flex;align-items:center;justify-content:space-between;gap:12px;backdrop-filter:blur(4px);
  }
  .hero-points{display:grid;gap:10px;margin-top:22px;}
  .hero-points li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--muted);}
  .dot{width:8px;height:8px;border-radius:999px;background:var(--celt);margin-top:8px;flex:0 0 auto;}

  /* 卡片 */
  .card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
    box-shadow:var(--shadow-sm);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .card-hover:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:rgba(31,95,139,.3);}
  .section{padding:64px 0;}
  @media (min-width:768px){.section{padding:96px 0;}}
  .section-head{max-width:760px;}
  .eyebrow{font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--brand);text-transform:uppercase;}

  .metric-num{font-size:clamp(1.9rem,3vw,2.4rem);line-height:1.1;font-weight:700;color:var(--brand);}
  .icon-box{
    width:44px;height:44px;border-radius:12px;display:inline-flex;align-items:center;justify-content:center;
    background:var(--brand-soft);color:var(--brand);font-weight:700;
  }
  .icon-box.celt{background:var(--celt-soft);color:var(--celt);}
  .icon-box.warm{background:var(--warm-soft);color:var(--warm);}

  .bar{height:10px;border-radius:999px;background:#EEF2F7;overflow:hidden;}
  .bar > span{display:block;height:100%;border-radius:999px;}
  .bar-before > span{background:#B7C3D0;}
  .bar-after > span{background:linear-gradient(90deg,#2E8B7A,#1F5F8B);}

  /* 资讯卡片 */
  .news-card{display:flex;flex-direction:column;overflow:hidden;height:100%;}
  .news-thumb{position:relative;overflow:hidden;border-radius:14px 14px 0 0;}
  .news-thumb img{width:100%;height:180px;object-fit:cover;transition:transform .4s ease;}
  .news-card:hover .news-thumb img{transform:scale(1.04);}
  .clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .clamp-3{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}

  /* FAQ */
  .faq{border-top:1px solid var(--line);}
  .faq:last-of-type{border-bottom:1px solid var(--line);}
  .faq summary{
    cursor:pointer;list-style:none;padding:20px 4px;display:flex;align-items:center;justify-content:space-between;gap:16px;
    font-weight:700;font-size:16px;transition:background-color .2s ease,color .2s ease;
  }
  .faq summary::-webkit-details-marker{display:none;}
  .faq summary:hover{color:var(--brand);}
  .faq[open] summary{color:var(--brand);}
  .faq-body{
    border-left:3px solid var(--brand);background:#F3F7FA;border-radius:10px;
    padding:14px 18px;margin:0 4px 20px;font-size:14px;line-height:1.8;color:var(--muted);
  }
  .chev{transition:transform .25s ease;flex:0 0 auto;color:var(--brand);}
  .faq[open] .chev{transform:rotate(180deg);}

  /* 表单 */
  .field-label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:6px;}
  .field{
    width:100%;border:1px solid var(--line);border-radius:var(--radius-btn);padding:11px 14px;background:#fff;
    font-size:15px;transition:border-color .2s ease,box-shadow .2s ease;outline:none;
  }
  .field:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,95,139,.16);}
  .field::placeholder{color:#94A3B8;}

  /* 页脚 */
  .site-footer{background:#F1F5F9;border-top:1px solid var(--line);padding:56px 0 0;}
  .footer-link{color:var(--muted);font-size:14px;line-height:2;}
  .footer-link:hover{color:var(--brand);}

  .divider{height:1px;background:var(--line);}
  .grid-watermark{
    background-image:linear-gradient(rgba(31,95,139,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(31,95,139,.06) 1px,transparent 1px);
    background-size:32px 32px;
  }
  @media (max-width:639px){
    .hero-visual img{height:240px;}
    .hero-float{position:static;margin-top:12px;left:auto;right:auto;bottom:auto;}
  }

/* roulang page: category1 */
:root{
    --brand:#1F5F8B;
    --brand-dark:#194E73;
    --brand-soft:#EAF2F8;
    --celt:#2E8B7A;
    --celt-soft:#E7F4F1;
    --warm:#D97745;
    --warm-soft:#FDF0E8;
    --bg:#F8FAFC;
    --card:#FFFFFF;
    --ink:#0F172A;
    --muted:#475569;
    --line:#E2E8F0;
    --radius:16px;
    --radius-sm:10px;
    --shadow:0 4px 12px rgba(15,23,42,.05);
    --shadow-hover:0 12px 24px rgba(31,95,139,.12);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--bg);
    color:var(--ink);
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
    font-size:16px;
    line-height:1.75;
    font-weight:400;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-radius:12px;}
  a{color:inherit;text-decoration:none;}
  button,input,textarea,select{font:inherit;color:inherit;}
  h1,h2,h3,h4,p,ul,ol{margin:0;}
  ul{padding:0;list-style:none;}
  h1{font-size:clamp(2rem,4vw,3.25rem);line-height:1.15;font-weight:700;letter-spacing:-.5px;}
  h2{font-size:clamp(1.5rem,2.5vw,2rem);line-height:1.3;font-weight:700;}
  h3{font-size:1.25rem;line-height:1.4;font-weight:700;}
  .container-x{max-width:1280px;margin:0 auto;padding-left:16px;padding-right:16px;}
  @media(min-width:768px){.container-x{padding-left:24px;padding-right:24px;}}
  @media(min-width:1280px){.container-x{padding-left:32px;padding-right:32px;}}
  .text-ink{color:var(--ink);}
  .text-muted{color:var(--muted);}
  .text-brand{color:var(--brand);}
  .text-celt{color:var(--celt);}
  .text-warm{color:var(--warm);}
  .small{font-size:14px;line-height:1.7;color:var(--muted);}
  .divider{height:1px;background:var(--line);}

  /* 顶栏 */
  .site-header{position:sticky;top:0;z-index:60;}
  .brand-row{background:#fff;border-bottom:1px solid var(--line);}
  .brand-mark{
    width:38px;height:38px;flex:0 0 38px;border-radius:12px;
    background:linear-gradient(135deg,#1F5F8B 0%,#2E8B7A 100%);
    color:#fff;display:grid;place-items:center;
    font-size:14px;font-weight:700;letter-spacing:.5px;
  }
  .top-search{
    width:260px;padding:9px 16px;border-radius:999px;
    border:1px solid var(--line);background:#F8FAFC;outline:none;
    font-size:14px;transition:border-color .2s,box-shadow .2s,background .2s;
  }
  .top-search:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(31,95,139,.15);}
  .channel-row{background:#F1F5F9;border-bottom:1px solid var(--line);}
  .channel-scroll{display:flex;gap:4px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;}
  .channel-scroll::-webkit-scrollbar{display:none;}
  .channel-link{
    display:inline-block;white-space:nowrap;padding:11px 16px;font-size:14px;font-weight:600;
    color:var(--muted);border-bottom:2px solid transparent;transition:all .2s ease;
  }
  .channel-link:hover{color:var(--brand);background:#E8EEF4;}
  .channel-link.is-active{color:var(--brand);border-bottom-color:var(--brand);background:#fff;}

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 22px;border-radius:var(--radius-sm);border:1px solid transparent;
    font-size:15px;font-weight:600;cursor:pointer;transition:all .2s ease;
  }
  .btn:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(31,95,139,.3);}
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 14px rgba(31,95,139,.2);}
  .btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 10px 20px rgba(31,95,139,.25);}
  .btn-outline{background:#fff;color:var(--brand);border-color:var(--brand);}
  .btn-outline:hover{background:var(--brand-soft);}
  .btn-warm{background:var(--warm);color:#fff;}
  .btn-warm:hover{background:#C4673A;transform:translateY(-1px);}
  .link-more{color:var(--brand);font-weight:600;font-size:14px;transition:all .2s ease;display:inline-flex;align-items:center;gap:6px;}
  .link-more:hover{color:var(--brand-dark);text-decoration:underline;gap:10px;}

  /* 徽章 */
  .badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:600;line-height:1.6;}
  .badge-brand{background:var(--brand-soft);color:var(--brand);}
  .badge-celt{background:var(--celt-soft);color:var(--celt);}
  .badge-warm{background:var(--warm-soft);color:var(--warm);}
  .badge-line{background:#F1F5F9;color:var(--muted);border:1px solid var(--line);}

  /* 卡片 */
  .card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
    box-shadow:var(--shadow);transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(31,95,139,.3);}
  .card-flat:hover{transform:none;box-shadow:var(--shadow);border-color:var(--line);}
  .stat-num{font-size:clamp(1.9rem,3vw,2.4rem);font-weight:700;line-height:1.1;color:var(--brand);letter-spacing:-1px;}

  /* Hero */
  .hero{
    position:relative;overflow:hidden;
    background-image:linear-gradient(90deg,rgba(248,250,252,.97) 0%,rgba(248,250,252,.90) 48%,rgba(248,250,252,.62) 100%),url('/assets/images/backpic/back-1.png');
    background-size:cover;background-position:center;
    border-bottom:1px solid var(--line);
  }
  .hero-grid-deco{
    position:absolute;inset:0;pointer-events:none;
    background-image:linear-gradient(rgba(31,95,139,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(31,95,139,.05) 1px,transparent 1px);
    background-size:48px 48px;
    mask-image:linear-gradient(180deg,rgba(0,0,0,.6),transparent 85%);
    -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.6),transparent 85%);
  }
  .breadcrumb{font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;align-items:center;gap:8px;}
  .breadcrumb a{color:var(--muted);transition:color .2s ease;}
  .breadcrumb a:hover{color:var(--brand);}
  .breadcrumb .sep{color:#94A3B8;}
  .breadcrumb .current{color:var(--muted);font-weight:600;}

  /* 步骤条 */
  .step-line{position:relative;padding-left:34px;}
  .step-line::before{content:"";position:absolute;left:11px;top:6px;bottom:6px;width:2px;background:var(--line);}
  .step-dot{
    position:absolute;left:0;top:2px;width:24px;height:24px;border-radius:999px;
    background:#fff;border:2px solid var(--brand);color:var(--brand);
    display:grid;place-items:center;font-size:12px;font-weight:700;
  }

  /* 对比条 */
  .bar-track{height:10px;border-radius:999px;background:#EEF2F6;overflow:hidden;}
  .bar-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,#1F5F8B,#2E8B7A);}
  .bar-fill-warm{height:100%;border-radius:999px;background:linear-gradient(90deg,#E9A57F,#D97745);}

  /* FAQ */
  .faq-item{
    background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .faq-item + .faq-item{margin-top:14px;}
  .faq-item[open]{border-color:rgba(31,95,139,.35);box-shadow:var(--shadow);background:#FBFDFF;}
  .faq-item summary{
    list-style:none;cursor:pointer;padding:18px 20px;font-weight:600;font-size:16px;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:hover{color:var(--brand);}
  .faq-icon{
    flex:0 0 24px;width:24px;height:24px;border-radius:999px;background:var(--brand-soft);color:var(--brand);
    display:grid;place-items:center;font-size:14px;font-weight:700;transition:transform .25s ease,background .2s ease;
  }
  .faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--brand);color:#fff;}
  .faq-body{padding:0 20px 20px 20px;border-left:3px solid var(--brand);margin:0 0 0 0;color:var(--muted);font-size:14.5px;line-height:1.8;}

  /* 表单 */
  .field-label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;}
  .field{
    width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;
    font-size:15px;outline:none;transition:border-color .2s,box-shadow .2s;
  }
  .field:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,95,139,.15);}
  .field::placeholder{color:#94A3B8;}

  /* CTA 深色条 */
  .cta-band{
    background:linear-gradient(120deg,#123A57 0%,#1F5F8B 55%,#2E8B7A 100%);
    color:#fff;border-radius:20px;position:relative;overflow:hidden;
  }
  .cta-band::after{
    content:"";position:absolute;right:-60px;top:-60px;width:260px;height:260px;border-radius:50%;
    background:rgba(255,255,255,.08);
  }

  /* 页脚 */
  .site-footer{background:#F1F5F9;border-top:1px solid var(--line);padding-top:52px;margin-top:0;}
  .footer-link{display:inline-block;color:var(--muted);font-size:14px;padding:3px 0;transition:color .2s ease,transform .2s ease;}
  .footer-link:hover{color:var(--brand);transform:translateX(2px);}

  @media(max-width:767px){
    .top-search{display:none;}
    h1{font-size:1.85rem;}
  }

/* roulang page: article */
:root{
  --brand:#1F5F8B;
  --brand-dark:#17496B;
  --celt:#2E8B7A;
  --warm:#D97745;
  --bg:#F8FAFC;
  --card:#FFFFFF;
  --ink:#0F172A;
  --muted:#475569;
  --line:#E2E8F0;
  --radius-card:16px;
  --radius-btn:10px;
  --radius-img:12px;
  --shadow-sm:0 4px 12px rgba(15,23,42,.05);
  --shadow-md:0 12px 24px rgba(31,95,139,.12);
  --space-section:4rem;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
html body{
  margin:0;
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans CJK SC',system-ui,-apple-system,'Segoe UI',sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s ease;}
button,input,select,textarea{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}

.container-x{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding-left:16px;
  padding-right:16px;
}
@media (min-width:768px){
  .container-x{padding-left:24px;padding-right:24px;}
}
@media (min-width:1024px){
  .container-x{padding-left:32px;padding-right:32px;}
}

/* ---------- Header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:60;
  background:var(--card);
  box-shadow:0 1px 0 rgba(15,23,42,.04);
}
.brand-row{background:var(--card);border-bottom:1px solid var(--line);}
.channel-row{background:var(--bg);border-bottom:1px solid var(--line);}
.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:42px;height:42px;
  flex:0 0 42px;
  border-radius:12px;
  background:linear-gradient(135deg,var(--brand),var(--celt));
  color:#fff;
  font-size:15px;
  font-weight:700;
  letter-spacing:.5px;
}
.channel-scroll{
  display:flex;
  align-items:stretch;
  gap:2px;
  overflow-x:auto;
  scrollbar-width:none;
  -ms-overflow-style:none;
}
.channel-scroll::-webkit-scrollbar{display:none;}
.channel-link{
  position:relative;
  display:inline-flex;
  align-items:center;
  white-space:nowrap;
  padding:12px 18px;
  font-size:15px;
  color:var(--muted);
  border-bottom:2px solid transparent;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.channel-link:hover{background:#fff;color:var(--brand);}
.channel-link.is-active{
  color:var(--brand);
  font-weight:600;
  background:#fff;
  border-bottom-color:var(--brand);
}
.top-search{
  width:260px;
  padding:9px 14px;
  border-radius:10px;
  border:1px solid var(--line);
  background:var(--bg);
  font-size:14px;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.top-search:focus{
  outline:none;
  background:#fff;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(31,95,139,.14);
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  line-height:1.2;
  cursor:pointer;
  transition:background .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 10px 20px rgba(31,95,139,.2);}
.btn-primary:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(31,95,139,.3);}
.btn-outline{background:#fff;color:var(--brand);border-color:rgba(31,95,139,.35);}
.btn-outline:hover{background:#EAF2F8;border-color:var(--brand);}
.btn-outline:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(31,95,139,.22);}
.btn-warm{background:var(--warm);color:#fff;}
.btn-warm:hover{background:#c1652f;transform:translateY(-1px);box-shadow:0 10px 20px rgba(217,119,69,.22);}
.btn-ghost{background:transparent;color:var(--brand);padding-left:0;padding-right:0;}
.btn-ghost:hover{color:var(--brand-dark);text-decoration:underline;}

/* ---------- Badges / misc ---------- */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:999px;
  font-size:12.5px;
  font-weight:600;
  line-height:1.6;
}
.badge-brand{background:rgba(31,95,139,.1);color:var(--brand);}
.badge-celt{background:rgba(46,139,122,.12);color:#256e61;}
.badge-warm{background:rgba(217,119,69,.13);color:#b0562a;}
.badge-line{background:#fff;border:1px solid var(--line);color:var(--muted);}
.small{font-size:14px;line-height:1.7;color:var(--muted);}
.divider{height:1px;background:var(--line);}

/* ---------- Breadcrumb ---------- */
.crumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13.5px;
  color:var(--muted);
}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand);text-decoration:underline;}
.crumb .sep{color:#94A3B8;}
.crumb .current{color:var(--muted);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}

/* ---------- Article header ---------- */
.article-head{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px;
  box-shadow:var(--shadow-sm);
}
@media (min-width:768px){
  .article-head{padding:38px 40px;}
}
.article-title{
  font-size:clamp(1.6rem,3.2vw,2.3rem);
  line-height:1.28;
  font-weight:700;
  letter-spacing:-.2px;
  color:var(--ink);
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 20px;
  margin-top:18px;
  padding-top:18px;
  border-top:1px dashed var(--line);
  font-size:13.5px;
  color:var(--muted);
}
.article-meta span{display:inline-flex;align-items:center;gap:6px;}

/* ---------- Article body ---------- */
.article-body{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 22px;
  margin-top:22px;
  box-shadow:var(--shadow-sm);
  font-size:16.5px;
  line-height:1.85;
  color:#1E293B;
  overflow-wrap:break-word;
}
@media (min-width:768px){
  .article-body{padding:40px 44px;font-size:17px;}
}
.article-body p{margin:0 0 1.15em;}
.article-body h2{
  font-size:clamp(1.25rem,2.4vw,1.5rem);
  font-weight:700;
  color:var(--ink);
  margin:2em 0 .75em;
  padding-left:14px;
  border-left:4px solid var(--brand);
  line-height:1.4;
}
.article-body h3{
  font-size:1.2rem;
  font-weight:700;
  color:var(--ink);
  margin:1.6em 0 .6em;
}
.article-body h4{
  font-size:1.05rem;
  font-weight:700;
  color:var(--brand);
  margin:1.4em 0 .5em;
}
.article-body ul,
.article-body ol{
  margin:0 0 1.2em;
  padding-left:1.35em;
}
.article-body ul li{list-style:disc;margin:.4em 0;}
.article-body ol li{list-style:decimal;margin:.4em 0;}
.article-body li::marker{color:var(--brand);}
.article-body a{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--brand-dark);}
.article-body strong{color:var(--ink);font-weight:700;}
.article-body blockquote{
  margin:1.5em 0;
  padding:16px 20px;
  background:#F1F7FB;
  border-left:4px solid var(--celt);
  border-radius:0 var(--radius-img) var(--radius-img) 0;
  color:#334155;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  border-radius:var(--radius-img);
  margin:1.5em auto;
  box-shadow:var(--shadow-sm);
}
.article-body figure{margin:1.5em 0;}
.article-body figcaption{
  font-size:13px;
  color:var(--muted);
  text-align:center;
  margin-top:8px;
}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:1.5em 0;
  font-size:14.5px;
}
.article-body th,
.article-body td{
  border:1px solid var(--line);
  padding:10px 12px;
  text-align:left;
}
.article-body th{background:var(--bg);color:var(--ink);font-weight:600;}
.article-body hr{border:none;border-top:1px dashed var(--line);margin:2em 0;}
.article-body code{
  background:#F1F5F9;
  padding:2px 6px;
  border-radius:6px;
  font-size:.92em;
}

/* ---------- Side cards ---------- */
.side-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:20px;
  box-shadow:var(--shadow-sm);
  margin-bottom:20px;
}
.side-card h3{
  font-size:15px;
  font-weight:700;
  color:var(--ink);
  padding-bottom:12px;
  margin-bottom:14px;
  border-bottom:1px solid var(--line);
}
.side-list li + li{margin-top:10px;}
.side-list a{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--muted);
}
.side-list a:hover{color:var(--brand);}
.side-list a::before{
  content:"";
  width:6px;height:6px;
  flex:0 0 6px;
  border-radius:999px;
  background:var(--brand);
  opacity:.45;
}
.tag-wrap{display:flex;flex-wrap:wrap;gap:8px;}
.tag{
  padding:5px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--bg);
  font-size:13px;
  color:var(--muted);
  transition:all .18s ease;
}
.tag:hover{background:#EAF2F8;color:var(--brand);border-color:rgba(31,95,139,.35);}

/* ---------- Related ---------- */
.rel-card{
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  height:100%;
}
.rel-card:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-md);
  border-color:rgba(31,95,139,.3);
}
.rel-card img{
  width:100%;
  height:158px;
  object-fit:cover;
}
.rel-card .rel-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.rel-card h3{
  font-size:16.5px;
  font-weight:700;
  line-height:1.5;
  color:var(--ink);
}
.rel-card:hover h3{color:var(--brand);}
.rel-card p{
  font-size:13.5px;
  line-height:1.7;
  color:var(--muted);
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.rel-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:12.5px;
  color:#94A3B8;
}

/* ---------- CTA / form ---------- */
.cta-panel{
  background:linear-gradient(135deg,#123C5C 0%,#1F5F8B 58%,#2E8B7A 130%);
  border-radius:var(--radius-card);
  padding:32px 24px;
  color:#fff;
  position:relative;
  overflow:hidden;
}
@media (min-width:768px){
  .cta-panel{padding:44px 48px;}
}
.cta-panel::after{
  content:"";
  position:absolute;
  right:-60px;top:-60px;
  width:240px;height:240px;
  border-radius:999px;
  background:rgba(255,255,255,.07);
}
.form-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:24px;
  box-shadow:var(--shadow-sm);
}
@media (min-width:768px){
  .form-card{padding:32px;}
}
.field-label{
  display:block;
  font-size:13.5px;
  font-weight:600;
  color:var(--ink);
  margin-bottom:8px;
}
.field{
  width:100%;
  padding:11px 14px;
  border-radius:10px;
  border:1px solid var(--line);
  background:var(--bg);
  font-size:14.5px;
  transition:border-color .18s ease,box-shadow .18s ease,background .18s ease;
}
.field:focus{
  outline:none;
  background:#fff;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(31,95,139,.14);
}
.field::placeholder{color:#94A3B8;}

/* ---------- Footer ---------- */
.site-footer{
  background:#F1F5F9;
  border-top:1px solid var(--line);
  margin-top:64px;
  padding-top:52px;
}
.site-footer p{color:var(--ink);}
.footer-link{
  display:inline-block;
  font-size:14px;
  color:var(--muted);
  line-height:2;
}
.footer-link:hover{color:var(--brand);text-decoration:underline;}

/* ---------- Responsive ---------- */
@media (max-width:1023px){
  .article-body{font-size:16.5px;}
}
@media (max-width:767px){
  .article-head{padding:22px 18px;}
  .article-body{padding:20px 16px;font-size:16px;}
  .side-card{margin-bottom:16px;}
  .cta-panel{padding:26px 18px;}
  .rel-card img{height:150px;}
}
@media (max-width:520px){
  .article-title{font-size:1.5rem;}
  .btn{padding:11px 18px;font-size:14.5px;}
  .channel-link{padding:11px 14px;font-size:14.5px;}
}

/* roulang page: category2 */
:root{
  --brand:#1F5F8B;
  --brand-dark:#17496B;
  --celt:#2E8B7A;
  --warm:#D97745;
  --ink:#0F172A;
  --muted:#475569;
  --fog:#E2E8F0;
  --cloud:#F8FAFC;
  --card:#FFFFFF;
  --radius-card:16px;
  --radius-btn:10px;
  --shadow-card:0 4px 12px rgba(15,23,42,.05);
  --shadow-hover:0 12px 24px rgba(31,95,139,.12);
  --font: "PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--cloud);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul{padding:0;list-style:none}
h1{font-size:clamp(2rem,4vw,3.25rem);line-height:1.15;font-weight:700;letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,2.5vw,2rem);line-height:1.25;font-weight:700}
h3{font-size:1.25rem;line-height:1.4;font-weight:700}
::selection{background:rgba(31,95,139,.16)}

.container-x{max-width:1280px;margin:0 auto;padding-left:16px;padding-right:16px}
@media (min-width:768px){.container-x{padding-left:24px;padding-right:24px}}
@media (min-width:1280px){.container-x{padding-left:32px;padding-right:32px}}

/* ---------- Header / Nav ---------- */
.site-header{position:sticky;top:0;z-index:60;background:#fff;box-shadow:0 1px 0 rgba(15,23,42,.06)}
.brand-row{background:#fff;border-bottom:1px solid var(--fog)}
.brand-mark{
  width:40px;height:40px;flex:0 0 40px;border-radius:12px;display:grid;place-items:center;
  font-weight:700;font-size:15px;letter-spacing:.5px;color:#fff;
  background:linear-gradient(135deg,#1F5F8B,#2E8B7A);
  box-shadow:0 6px 14px rgba(31,95,139,.25);
}
.top-search{
  width:240px;padding:9px 14px;font-size:14px;border-radius:10px;
  border:1px solid var(--fog);background:var(--cloud);outline:none;
  transition:border-color .2s, box-shadow .2s, background .2s;
}
.top-search::placeholder{color:#94A3B8}
.top-search:focus{border-color:var(--brand);background:#fff;box-shadow:0 0 0 3px rgba(31,95,139,.16)}

.channel-row{background:var(--cloud);border-bottom:1px solid var(--fog)}
.channel-scroll{display:flex;align-items:flex-end;gap:4px;overflow-x:auto;padding:6px 0 0;scrollbar-width:none}
.channel-scroll::-webkit-scrollbar{display:none}
.channel-link{
  white-space:nowrap;padding:10px 16px;font-size:15px;font-weight:500;color:var(--muted);
  border-bottom:2px solid transparent;border-radius:8px 8px 0 0;
  transition:color .2s, background .2s, border-color .2s;
}
.channel-link:hover{background:#fff;color:var(--brand)}
.channel-link.is-active{color:var(--brand);font-weight:600;background:#fff;border-bottom-color:var(--brand)}

/* ---------- Buttons / Badges ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-size:15px;font-weight:600;line-height:1.4;cursor:pointer;white-space:nowrap;
  transition:transform .18s, box-shadow .18s, background .18s, color .18s, border-color .18s;
}
.btn:focus-visible{outline:2px solid rgba(31,95,139,.45);outline-offset:2px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(31,95,139,.22)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px);box-shadow:0 12px 22px rgba(31,95,139,.26)}
.btn-outline{background:#fff;color:var(--brand);border-color:rgba(31,95,139,.35)}
.btn-outline:hover{background:rgba(31,95,139,.08);transform:translateY(-2px)}
.btn-warm{background:var(--warm);color:#fff;box-shadow:0 8px 18px rgba(217,119,69,.22)}
.btn-warm:hover{background:#c1652f;transform:translateY(-2px)}

.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:999px;font-size:12.5px;font-weight:600;line-height:1.7}
.badge-brand{background:rgba(31,95,139,.10);color:var(--brand)}
.badge-celt{background:rgba(46,139,122,.13);color:var(--celt)}
.badge-warm{background:rgba(217,119,69,.13);color:var(--warm)}

/* ---------- Bricks ---------- */
.section{padding:56px 0}
@media (min-width:768px){.section{padding:80px 0}}
@media (min-width:1024px){.section{padding:96px 0}}
.card{
  background:var(--card);border:1px solid var(--fog);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);transition:transform .22s, box-shadow .22s, border-color .22s;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover);border-color:rgba(31,95,139,.3)}

.crumb{font-size:13.5px;color:var(--muted);padding-top:20px}
.crumb a{color:var(--muted);transition:color .2s}
.crumb a:hover{color:var(--brand)}
.crumb .sep{margin:0 8px;color:#94A3B8}
.crumb .current{color:#64748B}

/* ---------- Hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--fog);
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(105deg,rgba(255,255,255,.97) 0%,rgba(248,250,252,.9) 52%,rgba(248,250,252,.72) 100%);
}
.cat-hero > .container-x{position:relative;z-index:1}
.hero-panel{
  background:rgba(255,255,255,.72);border:1px solid rgba(226,232,240,.9);
  border-radius:20px;padding:18px 20px;backdrop-filter:blur(4px);
}
.hero-stat-num{font-size:26px;font-weight:700;color:var(--brand);line-height:1.1}

/* ---------- Metrics ---------- */
.metric-num{font-size:clamp(1.75rem,3vw,2.25rem);font-weight:700;color:var(--brand);line-height:1.1;letter-spacing:-.01em}
.metric-label{font-size:14px;color:var(--muted)}

/* ---------- Alternating rows ---------- */
.alt-row{display:grid;gap:28px;align-items:center}
@media (min-width:1024px){
  .alt-row{grid-template-columns:1fr 1fr;gap:56px}
  .alt-row--flip .alt-media{order:2}
}
.media{
  border-radius:14px;overflow:hidden;border:1px solid var(--fog);
  box-shadow:0 10px 26px rgba(15,23,42,.08);background:#fff;
}
.media img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform .5s ease}
.alt-row:hover .media img{transform:scale(1.03)}

.dot-list li{position:relative;padding-left:20px;font-size:15px;color:var(--muted);margin-top:10px}
.dot-list li::before{
  content:"";position:absolute;left:0;top:11px;width:7px;height:7px;border-radius:50%;
  background:var(--celt);
}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14.5px;font-weight:600;color:var(--brand);transition:gap .2s, color .2s}
.link-arrow:hover{gap:10px;color:var(--brand-dark)}

/* ---------- Dark HUD ---------- */
.hud{
  background:#0F172A;border-radius:20px;padding:32px 24px;color:#E2E8F0;
  border:1px solid rgba(148,163,184,.22);
  background-image:radial-gradient(circle at 12% 0%,rgba(46,139,122,.22),transparent 45%),radial-gradient(circle at 92% 100%,rgba(31,95,139,.30),transparent 50%);
}
@media (min-width:768px){.hud{padding:44px 40px}}
.hud-item{background:rgba(255,255,255,.04);border:1px solid rgba(148,163,184,.22);border-radius:14px;padding:18px;transition:background .2s, border-color .2s, transform .2s}
.hud-item:hover{background:rgba(255,255,255,.08);border-color:rgba(46,139,122,.5);transform:translateY(-2px)}
.hud-num{font-size:13px;font-weight:700;color:#5EC9B4;letter-spacing:.08em}

/* ---------- FAQ ---------- */
.faq-item{background:#fff;border:1px solid var(--fog);border-radius:14px;overflow:hidden;transition:background .2s, border-color .2s, box-shadow .2s}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 20px;display:flex;align-items:center;justify-content:space-between;gap:16px;
  font-weight:700;font-size:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--brand)}
.faq-icon{
  flex:0 0 26px;width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  background:rgba(31,95,139,.1);color:var(--brand);font-weight:700;font-size:15px;
  transition:transform .25s ease, background .25s;
}
.faq-item[open]{background:#F4F8FB;border-color:rgba(31,95,139,.3);box-shadow:0 10px 22px rgba(31,95,139,.08)}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--brand);color:#fff}
.faq-body{
  margin:0 20px 20px;padding-left:14px;border-left:3px solid var(--brand);
  font-size:14.5px;color:var(--muted);
}

/* ---------- Form ---------- */
.form-card{background:#fff;border:1px solid var(--fog);border-radius:20px;box-shadow:0 14px 34px rgba(15,23,42,.07);padding:26px}
@media (min-width:768px){.form-card{padding:34px}}
.field{display:block;margin-top:16px}
.field > span{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;padding:12px 14px;border:1px solid var(--fog);border-radius:10px;background:#fff;
  font-size:15px;outline:none;transition:border-color .2s, box-shadow .2s;
}
.field textarea{min-height:118px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,95,139,.16)}

/* ---------- Footer ---------- */
.site-footer{background:#F1F5F9;border-top:1px solid var(--fog);padding-top:52px;margin-top:8px}
.footer-link{display:inline-block;font-size:14px;color:var(--muted);transition:color .18s, transform .18s}
.footer-link:hover{color:var(--brand);transform:translateX(3px)}
.small{font-size:14px;line-height:1.7;color:var(--muted)}
.divider{height:1px;background:var(--fog)}

/* roulang page: category3 */
:root{
  --brand:#1F5F8B;
  --brand-dark:#194E73;
  --brand-soft:#EAF2F8;
  --celt:#2E8B7A;
  --celt-soft:#E6F4F1;
  --warm:#D97745;
  --warm-soft:#FBEDE4;
  --bg:#F8FAFC;
  --card:#FFFFFF;
  --ink:#0F172A;
  --muted:#475569;
  --border:#E2E8F0;
  --radius:16px;
  --radius-sm:10px;
  --radius-pill:999px;
  --shadow-1:0 4px 12px rgba(15,23,42,.05);
  --shadow-2:0 12px 24px rgba(31,95,139,.12);
  --space-section:4rem;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans CJK SC','Helvetica Neue',Arial,sans-serif;
  font-size:16px;
  line-height:1.75;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto;}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--brand);}
button,input,select,textarea{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul{padding:0;list-style:none;}
h1{font-size:clamp(2rem,4vw,3.25rem);line-height:1.15;font-weight:700;letter-spacing:-.01em;}
h2{font-size:clamp(1.5rem,2.5vw,2rem);line-height:1.25;font-weight:700;}
h3{font-size:1.25rem;line-height:1.4;font-weight:700;}
p{color:var(--muted);}
:focus-visible{outline:2px solid rgba(31,95,139,.45);outline-offset:2px;border-radius:6px;}

.container-x{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding-left:16px;
  padding-right:16px;
}
@media (min-width:768px){
  .container-x{padding-left:24px;padding-right:24px;}
}
@media (min-width:1280px){
  .container-x{padding-left:32px;padding-right:32px;}
}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:50;}
.brand-row{background:#fff;border-bottom:1px solid var(--border);}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:12px;
  background:linear-gradient(135deg,var(--brand) 0%,#2F7CAE 100%);
  color:#fff;font-weight:700;font-size:15px;letter-spacing:.5px;
  box-shadow:0 4px 10px rgba(31,95,139,.25);
  flex:0 0 auto;
}
.top-search{
  width:230px;padding:8px 14px;border-radius:var(--radius-pill);
  border:1px solid var(--border);background:var(--bg);
  font-size:14px;color:var(--ink);transition:border-color .2s,box-shadow .2s,background .2s;
}
.top-search::placeholder{color:#94A3B8;}
.top-search:focus{outline:none;background:#fff;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,95,139,.15);}

.channel-row{background:#F1F5F9;border-bottom:1px solid var(--border);}
.channel-scroll{
  display:flex;gap:4px;overflow-x:auto;white-space:nowrap;
  -ms-overflow-style:none;scrollbar-width:none;
}
.channel-scroll::-webkit-scrollbar{display:none;}
.channel-link{
  display:inline-block;padding:11px 16px;font-size:15px;font-weight:600;
  color:var(--muted);border-bottom:2px solid transparent;
  transition:color .2s,background .2s,border-color .2s;
}
.channel-link:hover{color:var(--brand);background:#fff;}
.channel-link.is-active{color:var(--brand);border-bottom-color:var(--brand);background:#fff;}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;transition:background .2s,color .2s,border-color .2s,box-shadow .2s,transform .2s;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(31,95,139,.22);}
.btn-primary:hover{background:var(--brand-dark);color:#fff;transform:translateY(-1px);}
.btn-primary:focus{box-shadow:0 0 0 3px rgba(31,95,139,.3);}
.btn-outline{background:#fff;color:var(--brand);border-color:var(--brand);}
.btn-outline:hover{background:var(--brand-soft);color:var(--brand-dark);}
.btn-warm{background:var(--warm);color:#fff;box-shadow:0 6px 16px rgba(217,119,69,.24);}
.btn-warm:hover{background:#C4683A;color:#fff;transform:translateY(-1px);}

/* ---------- Badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--radius-pill);
  font-size:12.5px;font-weight:600;line-height:1.6;
}
.badge-brand{background:var(--brand-soft);color:var(--brand);}
.badge-celt{background:var(--celt-soft);color:var(--celt);}
.badge-warm{background:var(--warm-soft);color:var(--warm);}
.badge-line{background:#fff;color:var(--muted);border:1px solid var(--border);}

/* ---------- Cards ---------- */
.card{
  background:var(--card);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-1);transition:box-shadow .25s,border-color .25s,transform .25s;
}
.card:hover{box-shadow:var(--shadow-2);border-color:rgba(31,95,139,.3);transform:translateY(-2px);}
.card-flat{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-1);}
.icon-box{
  width:44px;height:44px;border-radius:12px;display:inline-flex;
  align-items:center;justify-content:center;font-size:18px;flex:0 0 auto;
}
.icon-brand{background:var(--brand-soft);color:var(--brand);}
.icon-celt{background:var(--celt-soft);color:var(--celt);}
.icon-warm{background:var(--warm-soft);color:var(--warm);}

.small{font-size:14px;line-height:1.7;color:var(--muted);}
.divider{height:1px;background:var(--border);}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background-image:linear-gradient(105deg,rgba(15,23,42,.86) 0%,rgba(25,78,115,.78) 55%,rgba(31,95,139,.6) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
}
.hero::after{
  content:'';position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:22px 22px;opacity:.35;pointer-events:none;
}
.hero-inner{position:relative;z-index:2;}
.hero p{color:rgba(255,255,255,.86);}
.hero-panel{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.22);
  border-radius:var(--radius);
  backdrop-filter:blur(6px);
}
.hero-stat-num{font-size:1.65rem;font-weight:700;color:#fff;line-height:1.2;}
.hero-stat-label{font-size:13px;color:rgba(255,255,255,.75);}

/* ---------- Metric strip ---------- */
.metric-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-1);padding:20px;transition:box-shadow .25s,transform .25s,border-color .25s;
}
.metric-card:hover{box-shadow:var(--shadow-2);transform:translateY(-2px);border-color:rgba(31,95,139,.28);}
.metric-num{font-size:clamp(1.7rem,3vw,2.1rem);font-weight:700;color:var(--brand);line-height:1.15;}
.metric-label{font-size:14px;color:var(--muted);margin-top:6px;}

/* ---------- Timeline ---------- */
.timeline{position:relative;padding-left:0;}
.timeline::before{
  content:'';position:absolute;left:19px;top:8px;bottom:8px;width:2px;
  background:linear-gradient(180deg,rgba(31,95,139,.45),rgba(46,139,122,.35));
}
.tl-item{position:relative;padding-left:60px;margin-bottom:26px;}
.tl-item:last-child{margin-bottom:0;}
.tl-dot{
  position:absolute;left:0;top:0;width:40px;height:40px;border-radius:50%;
  background:#fff;border:2px solid var(--brand);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  font-size:13px;font-weight:700;box-shadow:0 4px 10px rgba(31,95,139,.15);z-index:2;
}
.tl-card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-1);padding:20px;transition:box-shadow .25s,border-color .25s,transform .25s;
}
.tl-card:hover{box-shadow:var(--shadow-2);border-color:rgba(31,95,139,.3);transform:translateY(-2px);}
@media (min-width:768px){
  .timeline::before{left:50%;margin-left:-1px;}
  .tl-item{width:50%;padding-left:0;padding-right:64px;}
  .tl-item:nth-child(even){margin-left:50%;padding-left:64px;padding-right:0;}
  .tl-dot{left:auto;right:-20px;}
  .tl-item:nth-child(even) .tl-dot{right:auto;left:-20px;}
}

/* ---------- Compare panel ---------- */
.compare-card{border-radius:var(--radius);padding:24px;border:1px solid var(--border);background:#fff;box-shadow:var(--shadow-1);}
.compare-bad{background:linear-gradient(180deg,#FFF7F3 0%,#FFFFFF 60%);}
.compare-good{background:linear-gradient(180deg,#F1F9F6 0%,#FFFFFF 60%);}
.compare-list li{display:flex;gap:10px;padding:9px 0;border-bottom:1px dashed var(--border);font-size:14.5px;color:var(--muted);}
.compare-list li:last-child{border-bottom:none;}

/* ---------- FAQ ---------- */
.faq-item{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  margin-bottom:12px;overflow:hidden;transition:border-color .25s,box-shadow .25s;
}
.faq-item[open]{border-color:rgba(31,95,139,.35);box-shadow:var(--shadow-1);background:#fff;}
.faq-item summary{
  cursor:pointer;list-style:none;padding:18px 22px;
  font-weight:700;font-size:16px;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary .faq-icon{transition:transform .25s;color:var(--brand);font-size:15px;flex:0 0 auto;}
.faq-item[open] summary .faq-icon{transform:rotate(180deg);}
.faq-body{
  padding:2px 22px 18px 22px;margin-left:22px;
  border-left:3px solid var(--brand);font-size:14.5px;color:var(--muted);
}
.faq-item[open] .faq-body{background:#FBFDFE;}

/* ---------- Form ---------- */
.form-field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:6px;}
.form-field input,.form-field select,.form-field textarea{
  width:100%;padding:11px 14px;border-radius:var(--radius-sm);
  border:1px solid var(--border);background:#fff;font-size:14.5px;
  transition:border-color .2s,box-shadow .2s;
}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(31,95,139,.15);
}
.form-field textarea{min-height:110px;resize:vertical;}

/* ---------- Footer ---------- */
.site-footer{background:#F1F5F9;border-top:1px solid var(--border);}
.footer-link{font-size:14px;color:var(--muted);transition:color .2s,padding-left .2s;}
.footer-link:hover{color:var(--brand);padding-left:3px;}

/* ---------- Breadcrumb ---------- */
.crumb{font-size:13.5px;color:var(--muted);}
.crumb a{color:var(--muted);}
.crumb a:hover{color:var(--brand);}
.crumb .sep{margin:0 8px;color:#94A3B8;}
.crumb .current{color:#64748B;}

/* ---------- Misc ---------- */
.section{padding:56px 0;}
@media (min-width:768px){.section{padding:80px 0;}}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--brand);
  text-transform:uppercase;
}
.cover-img{border-radius:12px;width:100%;height:100%;object-fit:cover;}
.grid-lines{
  background-image:linear-gradient(rgba(31,95,139,.06) 1px,transparent 1px);
  background-size:100% 32px;
}
.link-arrow{font-size:14px;font-weight:600;color:var(--brand);}
.link-arrow:hover{color:var(--brand-dark);}
.link-arrow i{transition:transform .2s;margin-left:5px;}
.link-arrow:hover i{transform:translateX(3px);}

/* roulang page: category4 */
:root{
    --brand:#1F5F8B;
    --brand-dark:#17496B;
    --brand-soft:#EAF2F8;
    --celt:#2E8B7A;
    --celt-soft:#E8F4F1;
    --warm:#D97745;
    --warm-soft:#FBEDE5;
    --bg:#F8FAFC;
    --card:#FFFFFF;
    --ink:#0F172A;
    --muted:#475569;
    --border:#E2E8F0;
    --radius-card:16px;
    --radius-btn:10px;
    --shadow-card:0 4px 12px rgba(15,23,42,.05);
    --shadow-hover:0 12px 24px rgba(31,95,139,.12);
    --container:1280px;
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.75;
    color:var(--ink);
    background:var(--bg);
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
  ul,ol{padding:0;list-style:none;}
  a{color:inherit;text-decoration:none;}
  img{max-width:100%;display:block;}
  button,input,select,textarea{font:inherit;color:inherit;}
  a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{
    outline:2px solid rgba(31,95,139,.45);
    outline-offset:2px;
    border-radius:6px;
  }

  .container-x{
    width:100%;
    max-width:var(--container);
    margin:0 auto;
    padding-left:16px;
    padding-right:16px;
  }
  @media (min-width:768px){
    .container-x{padding-left:24px;padding-right:24px;}
  }
  @media (min-width:1280px){
    .container-x{padding-left:32px;padding-right:32px;}
  }

  /* ---------- Header ---------- */
  .site-header{position:sticky;top:0;z-index:50;}
  .brand-row{background:#fff;border-bottom:1px solid var(--border);}
  .brand-mark{
    width:38px;height:38px;flex:0 0 38px;
    display:flex;align-items:center;justify-content:center;
    border-radius:11px;
    background:linear-gradient(140deg,var(--brand) 0%,var(--celt) 100%);
    color:#fff;font-weight:700;font-size:14px;letter-spacing:.5px;
    box-shadow:0 4px 10px rgba(31,95,139,.25);
  }
  .top-search{
    width:230px;
    padding:8px 14px;
    font-size:14px;
    border:1px solid var(--border);
    border-radius:999px;
    background:var(--bg);
    transition:border-color .2s ease, box-shadow .2s ease, background .2s ease;
  }
  .top-search::placeholder{color:#94A3B8;}
  .top-search:focus{
    outline:none;
    background:#fff;
    border-color:var(--brand);
    box-shadow:0 0 0 3px rgba(31,95,139,.14);
  }
  .channel-row{background:#F1F5F9;border-bottom:1px solid var(--border);}
  .channel-scroll{
    display:flex;
    gap:4px;
    overflow-x:auto;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:none;
  }
  .channel-scroll::-webkit-scrollbar{display:none;}
  .channel-link{
    flex:0 0 auto;
    padding:11px 16px;
    font-size:14.5px;
    font-weight:500;
    color:var(--muted);
    border-bottom:2px solid transparent;
    white-space:nowrap;
    transition:color .18s ease, background .18s ease, border-color .18s ease;
  }
  .channel-link:hover{color:var(--brand);background:rgba(31,95,139,.07);}
  .channel-link.is-active{
    color:var(--brand);
    font-weight:700;
    border-bottom-color:var(--brand);
    background:var(--brand-soft);
  }

  /* ---------- Buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 22px;
    font-size:15px;font-weight:600;
    border-radius:var(--radius-btn);
    border:1px solid transparent;
    cursor:pointer;
    transition:background .2s ease, color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
  }
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px rgba(31,95,139,.22);}
  .btn-primary:hover{background:var(--brand-dark);transform:translateY(-1px);box-shadow:0 10px 22px rgba(31,95,139,.28);}
  .btn-primary:focus-visible{box-shadow:0 0 0 3px rgba(31,95,139,.3);}
  .btn-outline{background:#fff;color:var(--brand);border-color:rgba(31,95,139,.45);}
  .btn-outline:hover{background:var(--brand-soft);border-color:var(--brand);}
  .btn-warm{background:var(--warm);color:#fff;box-shadow:0 6px 16px rgba(217,119,69,.24);}
  .btn-warm:hover{background:#C2683A;transform:translateY(-1px);}

  /* ---------- Badges / Text helpers ---------- */
  .badge{
    display:inline-flex;align-items:center;
    padding:4px 12px;
    font-size:12.5px;font-weight:600;
    border-radius:999px;
    line-height:1.6;
  }
  .badge-brand{background:var(--brand-soft);color:var(--brand);}
  .badge-celt{background:var(--celt-soft);color:var(--celt);}
  .badge-warm{background:var(--warm-soft);color:#B65E2F;}
  .badge-muted{background:#EEF2F7;color:var(--muted);}
  .text-ink{color:var(--ink);}
  .text-muted{color:var(--muted);}
  .small{font-size:14px;line-height:1.7;color:var(--muted);}
  .divider{height:1px;background:var(--border);}

  /* ---------- Cards ---------- */
  .card{
    background:var(--card);
    border:1px solid var(--border);
    border-radius:var(--radius-card);
    box-shadow:var(--shadow-card);
    transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
  }
  .card:hover{
    transform:translateY(-2px);
    box-shadow:var(--shadow-hover);
    border-color:rgba(31,95,139,.3);
  }
  .icon-box{
    width:40px;height:40px;flex:0 0 40px;
    display:flex;align-items:center;justify-content:center;
    border-radius:12px;
    font-size:17px;font-weight:700;
  }

  /* ---------- Hero ---------- */
  .hero{
    position:relative;
    overflow:hidden;
    background-color:#0F172A;
    background-image:url('/assets/images/backpic/back-2.png');
    background-size:cover;
    background-position:center;
  }
  .hero::after{
    content:"";
    position:absolute;inset:0;
    background:linear-gradient(105deg, rgba(248,250,252,.97) 0%, rgba(248,250,252,.92) 46%, rgba(248,250,252,.62) 100%);
  }
  .hero-inner{position:relative;z-index:2;}

  /* ---------- Compare table ---------- */
  .cmp-table{width:100%;border-collapse:separate;border-spacing:0;min-width:720px;}
  .cmp-table th,.cmp-table td{
    padding:16px 18px;
    text-align:left;
    font-size:15px;
    border-bottom:1px solid var(--border);
    vertical-align:top;
  }
  .cmp-table thead th{
    font-size:14px;
    font-weight:700;
    letter-spacing:.3px;
    background:#F1F5F9;
    color:var(--muted);
    border-bottom:1px solid var(--border);
  }
  .cmp-table thead th:nth-child(1){border-top-left-radius:14px;}
  .cmp-table thead th:nth-child(3){border-top-right-radius:14px;background:var(--brand-soft);color:var(--brand);}
  .cmp-table tbody td:first-child{font-weight:600;color:var(--ink);}
  .cmp-table tbody tr:hover td{background:rgba(248,250,252,.9);}
  .cmp-table tbody td:nth-child(3){background:rgba(234,242,248,.55);}

  /* ---------- Masonry ---------- */
  .masonry{columns:1;column-gap:24px;}
  @media (min-width:768px){.masonry{columns:2;}}
  @media (min-width:1024px){.masonry{columns:3;}}
  .masonry > *{break-inside:avoid;margin-bottom:24px;}

  /* ---------- Steps ---------- */
  .step-row{position:relative;padding-left:46px;}
  .step-row::before{
    content:"";
    position:absolute;left:15px;top:38px;bottom:-18px;
    width:2px;background:var(--border);
  }
  .step-row:last-child::before{display:none;}
  .step-dot{
    position:absolute;left:0;top:2px;
    width:32px;height:32px;border-radius:999px;
    display:flex;align-items:center;justify-content:center;
    background:#fff;border:2px solid var(--brand);
    color:var(--brand);font-size:13px;font-weight:700;
  }

  /* ---------- FAQ ---------- */
  .faq-item{
    background:#fff;
    border:1px solid var(--border);
    border-radius:14px;
    overflow:hidden;
    transition:background .2s ease, border-color .2s ease, box-shadow .2s ease;
  }
  .faq-item + .faq-item{margin-top:12px;}
  .faq-item summary{
    list-style:none;
    cursor:pointer;
    padding:18px 50px 18px 20px;
    font-weight:600;
    font-size:15.5px;
    position:relative;
    transition:color .2s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::after{
    content:"+";
    position:absolute;right:20px;top:50%;
    transform:translateY(-50%);
    font-size:20px;font-weight:500;color:var(--brand);
    transition:transform .25s ease;
    line-height:1;
  }
  .faq-item[open]{background:#F8FAFC;border-color:rgba(31,95,139,.3);box-shadow:var(--shadow-card);}
  .faq-item[open] summary{color:var(--brand);}
  .faq-item[open] summary::after{content:"–";}
  .faq-body{
    padding:0 20px 20px 20px;
    margin-left:0;
    font-size:14.5px;
    line-height:1.8;
    color:var(--muted);
    border-left:3px solid var(--brand);
    margin-left:20px;
    padding-left:16px;
  }

  /* ---------- Forms ---------- */
  .field-label{display:block;font-size:14px;font-weight:600;margin-bottom:8px;color:var(--ink);}
  .field{
    width:100%;
    padding:11px 14px;
    font-size:15px;
    background:#fff;
    border:1px solid var(--border);
    border-radius:10px;
    transition:border-color .2s ease, box-shadow .2s ease;
  }
  .field::placeholder{color:#94A3B8;}
  .field:focus{
    outline:none;
    border-color:var(--brand);
    box-shadow:0 0 0 3px rgba(31,95,139,.14);
  }

  /* ---------- Footer ---------- */
  .site-footer{
    background:#F1F5F9;
    border-top:1px solid var(--border);
    padding-top:56px;
    color:var(--ink);
  }
  .footer-link{
    font-size:14px;
    color:var(--muted);
    transition:color .18s ease;
  }
  .footer-link:hover{color:var(--brand);}

  @media (max-width:767px){
    .step-row{padding-left:40px;}
    .step-dot{width:28px;height:28px;font-size:12px;}
    .step-row::before{left:13px;}
  }