/* roulang page: index */
:root{
    --brand:#0f6b65;
    --brand-deep:#0a4541;
    --brand-dark:#083532;
    --brand-soft:#d7ecea;
    --accent:#c89c4a;
    --accent-soft:#faf2df;
    --bg:#f5faf9;
    --surface:#ffffff;
    --text:#20322f;
    --muted:#6a7b78;
    --border:#dfeae7;
    --radius-card:1rem;
    --radius-btn:.65rem;
    --shadow-soft:0 1px 2px rgba(15,50,45,.04),0 12px 32px rgba(15,50,45,.06);
    --shadow-lift:0 2px 4px rgba(15,50,45,.06),0 22px 48px rgba(15,50,45,.10);
    --container:1260px;
    --header-h:74px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC","Source Han Sans SC",-apple-system,BlinkMacSystemFont,sans-serif;
    background:var(--bg);
    color:var(--text);
    line-height:1.72;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  ul,ol{list-style:none;margin:0;padding:0;}
  button,input{font-family:inherit;font-size:inherit;}
  .container{max-width:var(--container);margin:0 auto;padding-left:24px;padding-right:24px;}
  .section{padding:84px 0;}
  .section-sm{padding:56px 0;}

  .site-header{
    position:sticky;
    top:0;
    z-index:50;
    background:rgba(255,255,255,.9);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    border-bottom:1px solid rgba(220,232,229,.85);
  }
  .header-inner{display:flex;align-items:center;justify-content:space-between;gap:18px;height:var(--header-h);}
  .brand-lockup{display:inline-flex;align-items:center;gap:10px;min-width:0;}
  .brand-mark{
    display:inline-flex;align-items:center;justify-content:center;
    width:38px;height:38px;border-radius:10px;
    background:var(--brand-deep);color:#fff;
    font-weight:800;font-size:17px;letter-spacing:.04em;
    flex:none;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.2;min-width:0;}
  .brand-text strong{font-size:18px;font-weight:800;color:var(--brand-deep);white-space:nowrap;}
  .brand-text em{font-style:normal;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.08em;white-space:nowrap;}
  .nav-check{position:absolute;opacity:0;pointer-events:none;}
  .nav-menu{
    display:flex;align-items:center;justify-content:center;
    gap:2px;height:var(--header-h);
  }
  .nav-link{
    position:relative;display:inline-flex;align-items:center;justify-content:center;
    padding:10px 14px;font-size:15px;font-weight:600;color:#445a56;
    border-radius:8px;transition:color .2s ease,background .2s ease,box-shadow .2s ease;
  }
  .nav-link:hover{color:var(--brand);background:#f0f8f6;}
  .nav-link.is-active{color:var(--brand-deep);}
  .nav-link.is-active::after{
    content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;
    border-radius:2px;background:var(--brand);
  }
  .nav-toggle{
    display:none;
    align-items:center;justify-content:center;
    width:44px;height:44px;border-radius:10px;border:1px solid var(--border);
    background:#fff;font-size:20px;color:var(--brand-deep);cursor:pointer;
  }
  .header-act{flex:none;}
  .btn-mini{
    display:inline-flex;align-items:center;justify-content:center;
    padding:10px 18px;border-radius:var(--radius-btn);background:var(--brand-deep);
    color:#fff;font-weight:600;font-size:14px;transition:background .2s ease,transform .2s ease,box-shadow .2s ease;
  }
  .btn-mini:hover{background:var(--brand);transform:translateY(-1px);box-shadow:0 8px 22px rgba(10,69,65,.18);}

  @media (max-width:1023px){
    .nav-toggle{display:inline-flex;}
    .nav-menu{
      position:absolute;top:100%;left:16px;right:16px;
      display:none;flex-direction:column;align-items:stretch;
      background:#fff;border:1px solid var(--border);border-radius:16px;
      box-shadow:var(--shadow-lift);padding:10px;
    }
    .nav-link{justify-content:flex-start;min-height:44px;padding:10px 14px;}
    .nav-check:checked ~ .nav-menu{display:flex;}
    .nav-check:checked ~ .nav-toggle{background:var(--brand-soft);border-color:var(--brand);}
    .header-act{display:none;}
    .nav-link.is-active::after{left:14px;right:auto;width:22px;}
  }
  @media (max-width:480px){
    .brand-text strong{font-size:16px;}
    .brand-text em{font-size:10px;}
    .container{padding-left:18px;padding-right:18px;}
    .section{padding:56px 0;}
  }

  .btn{
    display:inline-flex;align-items:center;justify-content:center;
    gap:8px;border-radius:var(--radius-btn);font-weight:600;
    padding:13px 22px;border:1px solid transparent;cursor:pointer;
    transition:transform .22s ease,box-shadow .22s ease,background .22s ease,color .22s ease,border-color .22s ease;
  }
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(15,107,101,.16);}
  .btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:0 14px 30px rgba(10,69,65,.2);}
  .btn-ghost{background:#fff;border-color:#c8dbd6;color:var(--brand-deep);}
  .btn-ghost:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);box-shadow:0 12px 28px rgba(15,50,45,.08);}
  .btn-lg{padding:16px 28px;font-size:16px;border-radius:12px;}
  .btn-dark{background:var(--brand-dark);color:#fff;}
  .btn-dark:hover{background:var(--brand);transform:translateY(-2px);box-shadow:0 14px 30px rgba(8,53,50,.24);}

  .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:700;color:var(--brand);letter-spacing:.08em;}
  .eyebrow::before{content:"";width:20px;height:2px;border-radius:2px;background:var(--accent);}
  .section-title{font-size:30px;line-height:1.3;font-weight:800;color:var(--text);letter-spacing:-.01em;margin:8px 0 12px;}
  .section-desc{max-width:720px;color:var(--muted);font-size:16px;margin-bottom:36px;}
  @media (max-width:640px){.section-title{font-size:25px;}}

  .hero{
    position:relative;padding:108px 0 88px;
    background:#fff;overflow:hidden;
  }
  .hero-bg{
    position:absolute;inset:-5% -5% -5% -5%;
    background-image:url('/assets/images/backpic/back-1.webp');
    background-position:center;background-size:cover;
    opacity:.15;
  }
  .hero-bg::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(90deg,#ffffff 0%,rgba(255,255,255,.94) 34%,rgba(255,255,255,.72) 100%);
  }
  .hero-body{position:relative;max-width:820px;padding:0;}
  .hero-kicker{
    display:inline-flex;align-items:center;gap:8px;
    background:var(--brand-soft);color:var(--brand-deep);
    border:1px solid #bee0da;border-radius:999px;
    padding:6px 14px;font-size:13px;font-weight:600;
  }
  .hero-title{
    font-size:42px;line-height:1.22;font-weight:900;letter-spacing:-.02em;
    color:var(--text);margin:22px 0 20px;max-width:800px;
  }
  .hero-text{font-size:17px;color:#506560;max-width:680px;line-height:1.8;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
  .hero-notes{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:40px;color:var(--muted);font-size:13px;}

  .proof-strip{background:#fff;border-bottom:1px solid var(--border);padding:18px 0;}
  .proof-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
  .proof-item{display:flex;align-items:center;gap:10px;font-size:14px;color:#4a605c;font-weight:500;}
  .proof-dot{width:8px;height:8px;border-radius:50%;background:var(--brand);flex:none;}
  @media (max-width:900px){.proof-grid{grid-template-columns:repeat(2,1fr);}}
  @media (max-width:520px){.proof-grid{grid-template-columns:1fr;}}

  .icon-badge{
    display:inline-flex;align-items:center;justify-content:center;
    width:42px;height:42px;border-radius:12px;
    background:var(--brand-soft);color:var(--brand-deep);font-size:19px;
    flex:none;
  }

  .info-grid{display:grid;grid-template-columns:1.1fr 1.5fr 1fr;gap:22px;}
  .info-card{
    background:var(--surface);border:1px solid var(--border);
    border-radius:var(--radius-card);padding:28px;box-shadow:var(--shadow-soft);
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .info-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift);border-color:#c7ddd7;}
  .info-card.feature-bg{background:var(--brand-deep);border-color:var(--brand-deep);color:#e8f5f2;}
  .info-card.feature-bg .list-link-line{border-color:rgba(255,255,255,.14);color:#d9ebe7;}
  .info-card.feature-bg .list-link-line a{color:#cfe7e1;}
  .list-block{margin-top:20px;}
  .list-block li + li{border-top:1px dashed #e6efec;}
  .list-link-line{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    padding:13px 0;font-size:15px;color:#344b47;transition:padding .2s ease;
  }
  .list-link-line a{color:#344b47;font-weight:500;transition:color .2s ease;}
  .list-link-line:hover{padding-left:6px;}
  .list-link-line:hover a{color:var(--brand);}
  .list-link-line:hover .arrow{transform:translateX(4px);}
  .arrow{transition:transform .2s ease;color:var(--brand);font-weight:700;}
  .arrow.light{color:#a9cac2;}
  @media (max-width:1024px){.info-grid{grid-template-columns:1fr 1fr;}}
  @media (max-width:640px){.info-grid{grid-template-columns:1fr;}.info-card{padding:22px;}}

  .process-section{
    position:relative;background:var(--brand-dark);color:#eaf4f1;
    padding:86px 0 92px;overflow:hidden;
  }
  .process-section .section-title{color:#fff;}
  .process-section .section-desc{color:#b7d2cc;}
  .process-section .eyebrow{color:#9ed0c5;}
  .process-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step;}
  .process-item{
    background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
    border-radius:16px;padding:24px;position:relative;min-height:210px;
  }
  .process-num{font-size:26px;font-weight:900;color:#8fcfc3;display:block;margin-bottom:18px;}
  .process-item h3{font-size:17px;color:#fff;margin:0 0 8px;}
  .process-item p{font-size:14px;color:#c0d6d1;margin:0 0 14px;line-height:1.7;}
  .process-item a{color:#9ed4ca;font-weight:600;font-size:14px;}
  .process-item a:hover{color:#fff;}
  @media (max-width:1024px){.process-grid{grid-template-columns:1fr 1fr;}}
  @media (max-width:560px){.process-grid{grid-template-columns:1fr;}.process-section{padding:62px 0;}}

  .case-grid{display:grid;grid-template-columns:1fr 1fr 1.05fr;gap:22px;}
  .case-card{
    border-radius:18px;overflow:hidden;background:#fff;border:1px solid var(--border);
    box-shadow:var(--shadow-soft);transition:transform .25s ease,box-shadow .25s ease;
  }
  .case-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift);}
  .case-thumb{height:190px;background-size:cover;background-position:center;}
  .case-body{padding:22px;}
  .tag{display:inline-flex;align-items:center;padding:4px 12px;border-radius:999px;background:var(--accent-soft);color:#8b6428;font-size:12px;font-weight:600;}
  .tag.green{background:var(--brand-soft);color:var(--brand-deep);}
  .case-card h3{font-size:17px;margin:14px 0 6px;line-height:1.4;color:var(--text);}
  .case-card p{font-size:14px;color:var(--muted);margin:0;}
  @media (max-width:1024px){.case-grid{grid-template-columns:1fr 1fr;}}
  @media (max-width:640px){.case-grid{grid-template-columns:1fr;}}

  .plan-wrap{display:grid;grid-template-columns:1fr 1.06fr 1fr;gap:22px;align-items:stretch;}
  .plan-card{
    background:#fff;border:1px solid var(--border);border-radius:18px;padding:28px;
    box-shadow:var(--shadow-soft);display:flex;flex-direction:column;transition:transform .25s ease,box-shadow .25s ease;
  }
  .plan-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift);}
  .plan-card.highlight{border:1px solid var(--accent);box-shadow:0 18px 48px rgba(15,50,45,.1);}
  .plan-name{font-size:18px;font-weight:800;color:var(--brand-deep);}
  .plan-sub{color:var(--muted);font-size:14px;margin:4px 0 18px;}
  .plan-list li{display:flex;gap:10px;font-size:14px;color:#445a56;padding:5px 0;}
  .plan-list li::before{content:"✓";color:var(--brand);font-weight:800;flex:none;}
  .plan-cta{margin-top:26px;}
  .plan-mark{
    position:absolute;right:18px;top:-10px;background:var(--accent);color:#fff;
    font-size:12px;font-weight:700;border-radius:999px;padding:4px 12px;letter-spacing:.02em;
  }
  @media (max-width:1024px){.plan-wrap{grid-template-columns:1fr 1fr;}.plan-card.highlight{order:-1;}}
  @media (max-width:640px){.plan-wrap{grid-template-columns:1fr;}.plan-card{padding:24px;}}

  .news-area{
    background:#fff;border-bottom:1px solid var(--border);
  }
  .news-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;} 
  .news-feature-card{
    display:block;background:#fff;border:1px solid var(--border);border-radius:18px;
    overflow:hidden;box-shadow:var(--shadow-soft);transition:transform .25s ease,box-shadow .25s ease;
  }
  .news-feature-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lift);}
  .news-feature-thumb{position:relative;height:240px;background-size:cover;background-position:center;}
  .news-feature-thumb .tag{position:absolute;left:16px;top:16px;}
  .news-feature-content{padding:24px;}
  .news-feature-content h3{font-size:18px;line-height:1.5;color:var(--text);font-weight:700;margin:0 0 8px;}
  .news-feature-content h3 a:hover{color:var(--brand);}
  .news-feature-content p{color:var(--muted);font-size:14.5px;line-height:1.75;margin:0 0 16px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .news-meta{display:flex;align-items:center;gap:14px;color:var(--muted);font-size:13px;margin-top:16px;}
  .news-time{font-variant-numeric:tabular-nums;}
  .news-list{display:flex;flex-direction:column;gap:14px;}
  .news-list-item{
    display:flex;flex-direction:column;gap:6px;background:#fff;border:1px solid var(--border);
    padding:18px 20px;border-radius:16px;transition:box-shadow .2s ease,border-color .2s ease,transform .2s ease;
  }
  .news-list-item:hover{box-shadow:var(--shadow-soft);border-color:#a7cfc7;transform:translateY(-2px);}
  .news-list-item h3{font-size:15px;font-weight:600;color:var(--text);margin:0;}
  .news-list-item h3 a:hover{color:var(--brand);}
  .news-list-item .news-summary{font-size:13px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0;}
  .news-list-item .news-meta{margin:0;}
  .news-empty{
    border:1px dashed #aac7c1;background:#f4faf8;border-radius:18px;
    padding:44px 20px;text-align:center;color:var(--muted);font-size:15px;
  }
  @media (max-width:900px){.news-layout{grid-template-columns:1fr;}}
  @media (max-width:640px){.news-feature-content{padding:18px;}.news-feature-thumb{height:180px;}}

  .faq-list{max-width:900px;}
  .faq-item{
    background:#fff;border:1px solid var(--border);border-radius:16px;
    margin-bottom:14px;overflow:hidden;box-shadow:var(--shadow-soft);
  }
  .faq-summary{
    list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:18px;
    align-items:center;padding:22px 24px;font-size:16px;font-weight:700;color:var(--text);
  }
  .faq-summary::-webkit-details-marker{display:none;}
  .faq-summary::after{
    content:"+";display:inline-flex;align-items:center;justify-content:center;
    font-size:21px;color:var(--brand);width:26px;height:26px;flex:none;
    transition:transform .25s ease;
  }
  details[open] .faq-summary::after{transform:rotate(45deg);}
  .faq-answer{padding:0 24px 24px;color:#5a6d69;font-size:15px;line-height:1.85;}
  .faq-answer strong{color:var(--brand-dik);}
  .faq-item:hover{border-color:#b9d9d2;}
  @media (max-width:560px){.faq-summary{font-size:15px;padding:18px;}.faq-answer{padding:0 18px 18px;}}

  .bottom-cta{
    background:#fff;border-bottom:1px solid var(--border);
  }
  .cta-panel{
    display:flex;align-items:center;justify-content:space-between;gap:24px;
    background:#edf7f4;border:1px solid #cfe7e1;border-radius:20px;
    padding:38px 42px;
  }
  .cta-title{font-size:24px;font-weight:800;color:var(--brand-deep);margin:0 0 6px;}
  .cta-text{color:#617572;font-size:15px;max-width:600px;margin:0;}
  .cta-btns{display:flex;flex-wrap:wrap;gap:12px;flex:none;}
  @media (max-width:860px){
    .cta-panel{flex-direction:column;align-items:flex-start;padding:28px;}
    .section{padding:68px 0;}
    .hero-title{font-size:33px;}
  }
  @media (max-width:520px){
    .cta-panel{padding:22px;}
    .cta-btns .btn{width:100%;}
    .hero{padding:68px 0 54px;}
    .hero-title{font-size:28px;line-height:1.3;}
    .hero-text{font-size:15.5px;}
    .brand-text strong{font-size:15px;}
    .section{padding:50px 0;}
  }

  .site-footer{background:var(--brand-dark);color:#b8d1cc;}
  .footer-main{padding:66px 0 40px;}
  .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;}
  .footer-cols{display:flex;flex-direction:column;gap:14px;}
  .footer-cols .f-title{font-size:15px;font-weight:800;color:#fff;margin-bottom:6px;letter-spacing:.02em;}
  .footer-cols a{font-size:14px;color:#b8d1cc;transition:color .2s ease,padding-left .2s ease;}
  .footer-cols a:hover{color:#fff;padding-left:3px;}
  .footer-brand{display:flex;flex-direction:column;gap:16px;}
  .footer-brand p{font-size:14px;line-height:1.8;margin:0;max-width:380px;}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,.1);padding:24px 0;font-size:13px;
    display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;color:#92b0ab;
  }
  @media (max-width:960px){.footer-grid{grid-template-columns:1fr 1fr;}}
  @media (max-width:560px){.footer-grid{grid-template-columns:1fr;}.footer-main{padding:46px 0 28px;}}

  a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(15,122,115,.35);outline-offset:2px;border-radius:6px;}

/* roulang page: article */
:root {
            --brand: #0e7a72;
            --brand-deep: #0a4f4a;
            --brand-light: #e6f4f2;
            --brand-pale: #f2faf9;
            --ink: #1a2e35;
            --ink-soft: #4d6670;
            --ink-mute: #849aa3;
            --line: #dde8ea;
            --accent: #c8902a;
            --accent-soft: #faf3e4;
            --bg-soft: #f5f9fa;
            --radius: 18px;
            --radius-sm: 12px;
            --shadow: 0 1px 3px rgba(14, 42, 52, 0.06), 0 8px 24px rgba(14, 42, 52, 0.05);
            --shadow-lift: 0 2px 4px rgba(14, 42, 52, 0.08), 0 16px 36px rgba(14, 42, 52, 0.10);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            background-color: #fcfdfe;
            color: var(--ink);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease;
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 32px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 20px;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(221, 232, 234, 0.7);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .brand-lockup {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            user-select: none;
        }

        .brand-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand) 0%, #23a095 100%);
            color: #fff;
            font-size: 15px;
            font-weight: 800;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .brand-text strong {
            font-size: 17px;
            font-weight: 800;
            letter-spacing: 0.5px;
            color: var(--ink);
        }

        .brand-text em {
            font-style: normal;
            font-size: 11px;
            color: var(--ink-mute);
            letter-spacing: 0.8px;
            font-weight: 400;
        }

        .nav-check {
            display: none;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            border-radius: 8px;
            transition: background .2s;
        }
        .nav-toggle:hover {
            background: var(--brand-pale);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: auto;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--ink-soft);
            padding: 8px 12px;
            border-radius: 8px;
            position: relative;
            transition: color .25s, background .25s;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--brand);
            background: var(--brand-pale);
        }

        .nav-link.is-active {
            color: var(--brand);
            font-weight: 600;
        }

        .nav-link.is-active::after {
            content: '';
            display: block;
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            border-radius: 2px;
            background: var(--brand);
        }

        .header-act {
            margin-left: 12px;
            flex-shrink: 0;
        }

        .btn-mini {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 20px;
            background: var(--brand);
            color: #fff;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            border: 1px solid transparent;
            transition: all .25s;
            white-space: nowrap;
        }

        .btn-mini:hover {
            background: var(--brand-deep);
            box-shadow: 0 4px 12px rgba(14, 122, 114, 0.22);
            transform: translateY(-1px);
        }

        .btn-mini:active {
            transform: translateY(0);
            box-shadow: none;
        }

        @media (max-width: 1024px) {
            .header-inner {
                gap: 8px;
            }
            .nav-menu {
                gap: 2px;
            }
            .nav-link {
                padding: 8px 8px;
                font-size: 14px;
            }
            .header-act .btn-mini {
                padding: 8px 14px;
                font-size: 13px;
            }
        }

        @media (max-width: 820px) {
            .header-inner {
                height: 64px;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .nav-check {
                position: absolute;
                opacity: 0;
                pointer-events: none;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                padding: 12px 20px 20px;
                border-bottom: 1px solid var(--line);
                box-shadow: 0 16px 32px rgba(14, 42, 52, 0.08);
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
                z-index: 99;
            }
            .nav-link {
                padding: 12px 8px;
                font-size: 15px;
                border-radius: 6px;
            }
            .nav-link.is-active::after {
                left: 8px;
                right: auto;
                width: 28px;
            }
            .nav-check:checked+.nav-toggle+.nav-menu {
                display: flex;
            }
            .header-act {
                margin-left: 0;
            }
        }

        @media (max-width: 480px) {
            .brand-text strong {
                font-size: 15px;
            }
            .brand-text em {
                font-size: 10px;
            }
            .btn-mini-show {
                display: none;
            }
        }

        /* ===== Hero ===== */
        .article-hero {
            background: linear-gradient(180deg, #f0f8f7 0%, #fdfeff 100%);
            padding: 54px 0 42px;
            border-bottom: 1px solid rgba(221, 232, 234, 0.4);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--ink-mute);
            margin-bottom: 20px;
        }

        .breadcrumb a {
            color: var(--ink-soft);
            transition: color .2s;
        }

        .breadcrumb a:hover {
            color: var(--brand);
        }

        .breadcrumb .sep {
            display: inline-block;
            width: 4px;
            height: 4px;
            background: #c5d6d9;
            border-radius: 50%;
        }

        .breadcrumb .here {
            color: var(--ink-soft);
            font-weight: 500;
        }

        .tag-line {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--brand-light);
            color: var(--brand);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .article-title {
            font-size: clamp(28px, 4.5vw, 42px);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: 0.01em;
            color: var(--ink);
            margin-bottom: 18px;
            max-width: 820px;
            word-break: break-word;
        }

        .article-excerpt {
            font-size: 16px;
            line-height: 1.9;
            color: var(--ink-soft);
            max-width: 760px;
            background: rgba(230, 244, 242, 0.5);
            border-left: 3px solid var(--brand);
            padding: 16px 24px;
            border-radius: 0 14px 14px 0;
            margin: 20px 0 18px;
        }

        .article-meta-warp {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px 22px;
            font-size: 13px;
            color: var(--ink-mute);
        }

        .article-meta-warp span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta-warp .meta-cat {
            color: var(--accent);
            font-weight: 600;
        }

        .article-meta-warp .dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: #c5d6d9;
            display: inline-block;
        }

        .time-nums,
        .cms-created {
            font-variant-numeric: tabular-nums;
            font-feature-settings: 'tnum';
        }

        @media (max-width: 640px) {
            .article-hero {
                padding: 40px 0 28px;
            }
            .article-excerpt {
                margin: 14px 0 12px;
                padding: 14px 16px;
                font-size: 15px;
            }
            .article-meta-warp {
                gap: 6px 14px;
            }
        }

        /* ===== Main layout ===== */
        .article-main {
            padding: 56px 0 72px;
            background: #fff;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 800px) 1fr;
            gap: 56px;
            align-items: start;
        }

        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 36px;
            }
        }

        /* ===== Content area ===== */
        .article-body {
            max-width: 780px;
        }

        .article-body .content-wrap {
            font-size: 16px;
            line-height: 2;
            color: #2a3f48;
            letter-spacing: 0.01em;
        }

        .article-body .content-wrap p {
            margin-bottom: 24px;
        }

        .article-body .content-wrap img {
            margin: 28px auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        .article-body .content-wrap h2 {
            font-size: 23px;
            font-weight: 800;
            color: var(--ink);
            margin: 40px 0 18px;
            padding-top: 8px;
            letter-spacing: 0.01em;
        }

        .article-body .content-wrap h2::before {
            content: '';
            display: inline-block;
            width: 18px;
            height: 3px;
            background: var(--brand);
            border-radius: 3px;
            margin-right: 10px;
            vertical-align: middle;
        }

        .article-body .content-wrap h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            margin: 32px 0 14px;
        }

        .article-body .content-wrap h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--ink);
            margin: 24px 0 10px;
        }

        .article-body .content-wrap a {
            color: var(--brand);
            border-bottom: 1px solid rgba(14, 122, 114, 0.3);
            transition: all .2s;
        }

        .article-body .content-wrap a:hover {
            border-bottom-color: var(--brand);
            background: var(--brand-pale);
        }

        .article-body .content-wrap blockquote {
            border-left: 3px solid var(--brand);
            background: #f4faf9;
            padding: 16px 24px;
            margin: 28px 0;
            border-radius: 0 12px 12px 0;
            color: var(--ink-soft);
            font-size: 15px;
            line-height: 1.9;
        }

        .article-body .content-wrap ul,
        .article-body .content-wrap ol {
            margin: 20px 0;
            padding-left: 24px;
        }
        .article-body .content-wrap li {
            margin-bottom: 8px;
        }
        .article-body .content-wrap ul li {
            list-style: none;
            position: relative;
        }
        .article-body .content-wrap ul li::before {
            content: '';
            position: absolute;
            left: -18px;
            top: 12px;
            width: 6px;
            height: 6px;
            border-radius: 2px;
            background: var(--brand);
            opacity: 0.7;
        }

        .article-body .content-wrap code {
            background: var(--brand-pale);
            border: 1px solid var(--line);
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 14px;
            color: var(--brand-deep);
        }

        .article-body .content-wrap pre {
            background: #122b31;
            border-radius: 14px;
            padding: 22px 26px;
            overflow-x: auto;
            margin: 24px 0;
            color: #bee3dd;
            font-size: 14px;
            line-height: 1.8;
        }
        .article-body .content-wrap pre code {
            background: transparent;
            border: none;
            padding: 0;
            color: inherit;
        }

        .article-body .content-wrap table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            display: block;
            overflow-x: auto;
            border-radius: 12px;
            border: 1px solid var(--line);
        }
        .article-body .content-wrap th {
            background: var(--brand-pale);
            font-weight: 700;
            color: var(--ink);
            padding: 12px 16px;
            text-align: left;
            border-bottom: 1px solid var(--line);
        }
        .article-body .content-wrap td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--line);
            font-size: 15px;
            color: var(--ink-soft);
        }
        .article-body .content-wrap tr:last-child td {
            border-bottom: none;
        }

        /* ===== Not found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
            border: 2px dashed var(--line);
            border-radius: var(--radius);
            background: #fafcfd;
        }
        .not-found-box h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--ink-mute);
            font-size: 15px;
            margin-bottom: 24px;
        }
        .not-found-box .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            background: var(--brand);
            color: #fff;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            transition: all .25s;
        }
        .not-found-box .btn-primary:hover {
            background: var(--brand-deep);
            box-shadow: 0 6px 16px rgba(14, 122, 114, 0.25);
            transform: translateY(-2px);
        }

        /* ===== Post nav ===== */
        .post-nav-footer {
            margin-top: 48px;
            padding-top: 28px;
            border-top: 1px solid var(--line);
            display: flex;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .post-nav-link {
            font-size: 14px;
            color: var(--ink-soft);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 0;
            transition: all .2s;
            background: none;
            border: none;
            font-family: inherit;
        }
        .post-nav-link:hover {
            color: var(--brand);
        }
        .post-nav-link .arrow {
            font-style: normal;
            transition: transform .25s;
            display: inline-block;
        }
        .post-nav-link:hover .arrow-prev {
            transform: translateX(-4px);
        }
        .post-nav-link:hover .arrow-next {
            transform: translateX(4px);
        }

        /* ===== Side widgets ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
            position: sticky;
            top: 100px;
        }

        @media (max-width: 1024px) {
            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 640px) {
            .article-sidebar {
                grid-template-columns: 1fr;
            }
        }

        .side-card {
            background: #fafcfd;
            border: 1px solid var(--line);
            border-radius: 16px;
            padding: 24px;
        }

        .side-card-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--ink);
            padding-bottom: 14px;
            border-bottom: 1px solid var(--line);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .side-card-title .swatch {
            width: 6px;
            height: 18px;
            border-radius: 4px;
            background: var(--brand);
            display: block;
        }

        .entry-info-list {
            list-style: none;
        }

        .entry-info-list li {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 9px 0;
            border-bottom: 1px dashed var(--line);
            font-size: 14px;
        }
        .entry-info-list li:last-child {
            border-bottom: none;
        }

        .entry-info-list .entry-label {
            color: var(--ink-mute);
            font-weight: 500;
            font-size: 13px;
        }

        .entry-info-list .entry-value {
            color: var(--ink-soft);
            font-weight: 600;
        }

        .row-links {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .row-links a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 8px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--ink-soft);
            transition: all .2s;
        }
        .row-links a:hover {
            background: var(--brand-pale);
            color: var(--brand);
        }
        .row-links a .btn-icon-hint {
            opacity: 0;
            transform: translateX(-4px);
            transition: all .2s;
            font-weight: 700;
        }
        .row-links a:hover .btn-icon-hint {
            opacity: 1;
            transform: translateX(0);
        }

        .side-case-card {
            background: #fff;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--line);
            transition: all .3s ease;
        }
        .side-case-card:hover {
            box-shadow: var(--shadow-lift);
        }
        .side-case-card img {
            width: 100%;
            height: 100px;
            object-fit: cover;
        }
        .side-case-body {
            padding: 14px 16px;
        }
        .side-case-body h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--ink);
            line-height: 1.5;
            margin-bottom: 4px;
        }
        .side-case-body p {
            font-size: 12px;
            color: var(--ink-mute);
            line-height: 1.6;
        }

        /* ===== CTA ===== */
        .section-cta {
            background: linear-gradient(135deg, #edf8f6 0%, #f6fbfa 50%, #e8f2f0 100%);
            border-radius: 20px;
            margin-top: 56px;
            padding: 44px 48px;
            text-align: center;
            border: 1px solid rgba(14, 122, 114, 0.15);
            position: relative;
            overflow: hidden;
        }

        .section-cta::before {
            content: '';
            position: absolute;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(14, 122, 114, 0.08) 0%, transparent 65%);
            top: -100px;
            right: -80px;
        }

        .section-cta h2 {
            font-size: 24px;
            font-weight: 800;
            color: var(--ink);
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }

        .section-cta p {
            color: var(--ink-soft);
            font-size: 15px;
            max-width: 480px;
            margin: 0 auto 26px;
            line-height: 1.8;
            position: relative;
            z-index: 1;
        }

        .cta-buttons {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            justify-content: center;
            padding: 12px 30px;
            background: var(--brand);
            color: #fff;
            border: 1px solid var(--brand);
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            transition: all .25s;
        }

        .btn-primary:hover {
            background: var(--brand-deep);
            border-color: var(--brand-deep);
            box-shadow: 0 8px 18px rgba(14, 122, 114, 0.2);
            transform: translateY(-2px);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            justify-content: center;
            padding: 11px 28px;
            background: transparent;
            color: var(--brand);
            border: 1px solid rgba(14, 122, 114, 0.5);
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            transition: all .25s;
        }

        .btn-outline:hover {
            background: rgba(14, 122, 114, 0.08);
            border-color: var(--brand);
            transform: translateY(-2px);
        }

        @media (max-width: 640px) {
            .section-cta {
                padding: 32px 20px;
            }
            .section-cta h2 {
                font-size: 20px;
            }
        }

        /* ===== Related ===== */
        .related-section {
            margin-top: 72px;
            border-top: 1px solid var(--line);
            padding-top: 48px;
        }

        .related-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            margin-bottom: 32px;
            gap: 16px;
        }

        .related-head .text-side h2 {
            font-size: 24px;
            font-weight: 800;
            color: var(--ink);
            line-height: 1.3;
        }

        .related-head .text-side p {
            font-size: 14px;
            color: var(--ink-mute);
            margin-top: 4px;
        }

        .link-more {
            font-size: 13px;
            color: var(--brand);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            white-space: nowrap;
            transition: all .2s;
        }

        .link-more:hover {
            gap: 8px;
            color: var(--brand-deep);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        @media (max-width: 900px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 600px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }

        .rel-card {
            border-radius: var(--radius);
            background: #fff;
            border: 1px solid var(--line);
            overflow: hidden;
            transition: all .35s;
            box-shadow: var(--shadow);
            display: block;
        }

        .rel-card:hover {
            border-color: rgba(14, 122, 114, 0.4);
            box-shadow: var(--shadow-lift);
            transform: translateY(-4px);
        }

        .rel-card .rel-cover-block {
            height: 140px;
            background: var(--brand-pale);
            position: relative;
            overflow: hidden;
        }

        .rel-card .rel-cover-block img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .rel-card:hover .rel-cover-block img {
            transform: scale(1.05);
        }

        .rel-card .rel-body {
            padding: 20px 22px 24px;
        }

        .rel-card .rel-meta {
            display: flex;
            gap: 8px;
            align-items: center;
            margin-bottom: 8px;
            font-size: 12px;
            color: var(--ink-mute);
        }

        .rel-card .rel-meta .tag {
            background: var(--brand-light);
            color: var(--brand);
            border-radius: 4px;
            padding: 2px 8px;
            font-weight: 600;
            font-size: 11px;
            display: inline-block;
        }

        .rel-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.5;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .rel-card p {
            font-size: 13px;
            color: var(--ink-mute);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .rel-card .read-more {
            margin-top: 12px;
            font-size: 13px;
            color: var(--brand);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap .25s;
        }

        .rel-card:hover .read-more {
            gap: 8px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0a2b30;
            color: #ffffff;
            padding: 60px 0 24px;
            font-size: 14px;
        }

        .footer-main {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand p {
            color: #9cc1ba;
            font-size: 14px;
            line-height: 1.9;
            margin-top: 14px;
            max-width: 320px;
        }

        .footer-brand .brand-lockup .brand-text strong {
            color: #ffffff;
        }

        .footer-brand .brand-lockup .brand-text em {
            color: #9cc1ba;
        }

        .f-title {
            font-size: 15px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
            display: block;
            letter-spacing: 0.05em;
        }

        .footer-cols {
            display: flex;
            flex-direction: column;
        }

        .footer-cols a {
            color: #9cc1ba;
            font-size: 14px;
            padding: 6px 0;
            transition: color .2s;
            line-height: 1.6;
        }

        .footer-cols a:hover {
            color: #ffffff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px 16px;
            color: #6b948e;
            font-size: 13px;
        }

        @media (max-width: 980px) {
            .footer-main {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .footer-main {
                grid-template-columns: 1fr;
            }
        }

        .footer-brand .brand-lockup .brand-mark {
            background: var(--brand);
        }
        .footer-bottom .legal-info {
            display: flex;
            gap: 16px;
        }
        @media (max-width: 480px) {
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        
        /* ===== TOC ===== */
        .article-toc {
            margin-bottom: 28px;
            padding: 20px 0 8px;
        }
        .article-toc-title {
            font-size: 14px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 12px;
        }
        .article-toc ul {
            list-style: none;
            padding: 0;
        }
        .article-toc ul li {
            padding: 5px 0;
            padding-left: 14px;
            border-left: 2px solid transparent;
            transition: all .2s;
        }
        .article-toc ul li:hover {
            border-left-color: var(--brand);
        }
        .article-toc ul li a {
            font-size: 14px;
            color: var(--ink-soft);
            display: inline-block;
            position: relative;
            transition: all .2s;
        }
        .article-toc ul li a:hover {
            color: var(--brand);
        }
        .article-toc ul li a::before {
            content: '·';
            position: absolute;
            left: -14px;
            color: var(--brand);
            opacity: 0.6;
        }
        .cms-date {
            font-variant-numeric: tabular-nums;
            font-feature-settings: 'tnum';
        }

/* roulang page: category1 */
:root {
    --primary: #0e6e66;
    --primary-dark: #084a47;
    --secondary: #c9975d;
    --bg: #f7f9fa;
    --card: #ffffff;
    --text: #1b2f33;
    --text-2: #52676c;
    --line: #e3edf0;
    --radius: 18px;
    --shadow: 0 1px 2px rgba(16, 63, 61, .05), 0 10px 30px rgba(16, 63, 61, .05);
    --shadow-up: 0 2px 4px rgba(16, 63, 61, .06), 0 18px 40px rgba(16, 63, 61, .08);
  }

  * {
    box-sizing: border-box;
  }
  html {
    scroll-behavior: smooth;
  }
  body {
    margin: 0;
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }
  a {
    color: inherit;
    text-decoration: none;
  }
  img {
    max-width: 100%;
    display: block;
  }
  button,
  input,
  summary {
    font-family: inherit;
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
  }
  .site-header .container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
  }
  .header-inner {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 28px;
    min-height: 72px;
    position: relative;
  }
  .brand-lockup {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-height: 40px;
  }
  .brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 11px;
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    font-size: 14px;
    letter-spacing: .02em;
  }
  .brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.25;
    letter-spacing: -.01em;
  }
  .brand-text strong {
    color: var(--text);
    font-weight: 700;
    font-size: 16px;
    white-space: nowrap;
  }
  .brand-text em {
    color: var(--text-2);
    font-size: 11px;
    font-style: normal;
    letter-spacing: .12em;
    white-space: nowrap;
  }
  .nav-menu {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
  }
  .nav-link {
    position: relative;
    padding: 8px 2px;
    margin: 0 12px;
    font-size: 15px;
    font-weight: 500;
    color: #42595d;
    border-bottom: 2px solid transparent;
    transition: color .2s ease, border-color .2s ease;
    white-space: nowrap;
  }
  .nav-link:hover {
    color: var(--primary);
  }
  .nav-link.is-active {
    color: var(--primary);
    border-bottom-color: var(--primary);
  }
  .btn-mini {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 38px;
    padding: 0 18px;
    border-radius: 10px;
    background: var(--primary);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    transition: background .2s ease, transform .2s ease;
    white-space: nowrap;
  }
  .btn-mini:hover {
    background: var(--primary-dark);
  }
  .nav-check {
    position: absolute;
    opacity: 0;
    pointer-events: none;
  }
  .nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    border-radius: 12px;
    align-items: center;
    justify-content: center;
    color: var(--text);
    cursor: pointer;
  }
  @media (max-width: 920px) {
    .site-header .container {
      padding: 0 16px;
    }
    .header-inner {
      display: flex;
      justify-content: space-between;
      gap: 12px;
    }
    .header-act {
      display: none;
    }
    .nav-toggle {
      display: inline-flex;
      order: 3;
    }
    .nav-check {
      top: 16px;
      right: 16px;
    }
    .brand-lockup {
      margin-right: auto;
    }
    .nav-menu {
      display: none;
      position: absolute;
      top: calc(100% + 8px);
      left: 16px;
      right: 16px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 18px;
      box-shadow: var(--shadow-up);
      padding: 12px;
      flex-direction: column;
      align-items: stretch;
      gap: 2px;
      z-index: 60;
    }
    .nav-check:checked ~ .nav-menu {
      display: flex;
    }
    .nav-link {
      display: block;
      margin: 0;
      padding: 13px 14px;
      border-radius: 10px;
      border-bottom: 0;
      color: var(--text);
      font-size: 16px;
    }
    .nav-link:hover,
    .nav-link.is-active {
      background: #f0f6f5;
      color: var(--primary);
    }
    .nav-toggle svg {
      pointer-events: none;
    }
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 11px;
    font-size: 15px;
    font-weight: 600;
    line-height: 1;
    transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease;
    white-space: nowrap;
  }
  .btn-primary {
    background: var(--primary);
    color: #fff;
  }
  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
  }
  .btn-outline {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, .6);
    color: #fff;
  }
  .btn-outline:hover {
    background: rgba(255, 255, 255, .12);
  }
  .btn-dark-line {
    border: 1px solid rgba(14, 110, 102, .3);
    color: var(--primary);
    background: transparent;
  }
  .btn-dark-line:hover {
    background: rgba(14, 110, 102, .06);
  }

  .site-footer {
    background: #082f30;
    color: #c3d6d4;
  }
  .site-footer .container {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
  }
  .footer-main {
    padding-top: 60px;
    padding-bottom: 40px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.1fr;
    gap: 44px 36px;
  }
  .footer-brand p {
    margin: 18px 0 0;
    max-width: 320px;
    color: #a3c0ba;
    font-size: 14px;
    line-height: 1.85;
  }
  .footer-cols {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .f-title {
    font-size: 14px;
    font-weight: 600;
    color: #f0f7f5;
    margin-bottom: 4px;
    letter-spacing: .03em;
  }
  .site-footer .footer-cols a {
    font-size: 14px;
    color: #a9c5c1;
    transition: color .2s ease;
  }
  .site-footer .footer-cols a:hover {
    color: #fff;
  }
  .footer-bottom {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    padding: 22px 24px;
    border-top: 1px solid rgba(255, 255, 255, .12);
    font-size: 13px;
    color: #7ca39e;
  }
  .footer-bottom span + span::before {
    content: '·';
    margin-right: 10px;
    opacity: .5;
  }
  @media (max-width: 900px) {
    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 40px 24px;
    }
  }
  @media (max-width: 560px) {
    .footer-grid {
      grid-template-columns: 1fr;
    }
    .footer-bottom {
      justify-content: center;
      text-align: center;
    }
  }

  .page-section {
    padding-top: 84px;
    padding-bottom: 84px;
  }
  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .12em;
    color: var(--primary);
    text-transform: uppercase;
  }
  .eyebrow::before {
    content: '';
    width: 20px;
    height: 2px;
    background: var(--secondary);
    border-radius: 2px;
  }

  .cat-hero {
    position: relative;
    background: #082f30;
    color: #fff;
    overflow: hidden;
  }
  .cat-hero-bg {
    position: absolute;
    inset: 0;
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    opacity: .3;
  }
  .cat-hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(6, 36, 38, .94) 20%, rgba(10, 60, 60, .72) 60%, rgba(10, 60, 60, .4));
  }
  .cat-hero-content {
    position: relative;
    z-index: 2;
  }
  .hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .1em;
    color: #a4d5cd;
    margin-bottom: 18px;
  }
  .hero-kicker::before {
    content: '';
    width: 26px;
    height: 1px;
    background: var(--secondary);
  }
  .cat-hero h1 {
    font-size: clamp(34px, 5vw, 48px);
    line-height: 1.18;
    font-weight: 700;
    letter-spacing: -.02em;
    margin: 0;
    color: #fff;
  }
  .hero-guide {
    margin-top: 18px;
    font-size: 16px;
    color: #cfe5e2;
    max-width: 620px;
  }
  .hero-box {
    margin-top: 28px;
    padding: 20px 22px;
    background: rgba(255, 255, 255, .08);
    border: 1px solid rgba(255, 255, 255, .16);
    border-radius: 18px;
    backdrop-filter: blur(8px);
  }
  .hero-box p {
    margin: 0;
    font-size: 14px;
    color: #d5e6e3;
    line-height: 1.9;
  }
  .hero-action {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
  }
  .hero-track {
    position: relative;
    z-index: 2;
    border-top: 1px solid rgba(255, 255, 255, .16);
    background: rgba(4, 30, 31, .4);
  }
  .hero-track-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 18px 24px;
    display: grid;
    grid-template-columns: repeat(4, auto);
    gap: 12px;
    justify-content: space-between;
    align-items: center;
  }
  .hero-track-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #c4dbd7;
    font-size: 13px;
    white-space: nowrap;
  }
  .hero-track-item span {
    color: var(--secondary);
  }
  @media (max-width: 920px) {
    .hero-track-inner {
      overflow-x: auto;
      padding: 14px 16px;
      gap: 22px;
      justify-content: flex-start;
    }
    .hero-track-item {
      flex-shrink: 0;
    }
  }

  .check-list {
    display: flex;
    flex-direction: column;
  }
  .check-li {
    display: grid;
    grid-template-columns: 48px 1fr 28px;
    gap: 18px;
    align-items: flex-start;
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
    transition: background .2s ease;
    border-radius: 14px;
    padding-left: 10px;
    padding-right: 10px;
  }
  .check-li:hover {
    background: #f0f6f5;
  }
  .check-li:first-child {
    border-top: 1px solid var(--line);
  }
  .step-index {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    border: 1px solid rgba(14, 110, 102, .2);
    background: rgba(14, 110, 102, .06);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
  .check-li h3 {
    margin: 0 0 6px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -.01em;
  }
  .check-li p {
    margin: 0;
    font-size: 15px;
    color: var(--text-2);
    line-height: 1.85;
  }
  .arrow-link {
    color: var(--primary);
    font-size: 22px;
    line-height: 1;
    opacity: 0;
    transform: translateX(-6px);
    transition: opacity .2s, transform .2s;
  }
  .check-li:hover .arrow-link {
    opacity: 1;
    transform: translateX(0);
  }

  .featured-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform .25s ease, box-shadow .25s ease;
    display: flex;
    flex-direction: column;
  }
  .featured-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-up);
  }
  .featured-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
  }
  .card-body {
    padding: 26px 28px 28px;
  }
  .tag {
    display: inline-flex;
    align-items: center;
    font-size: 12px;
    font-weight: 600;
    color: var(--secondary);
    border: 1px solid rgba(201, 151, 93, .3);
    background: rgba(201, 151, 93, .06);
    border-radius: 999px;
    padding: 4px 12px;
    letter-spacing: .06em;
  }
  .featured-card h3,
  .side-ribbon h3 {
    margin: 14px 0 10px;
    font-size: 21px;
    color: var(--text);
    line-height: 1.4;
  }
  .featured-card p,
  .side-ribbon p {
    margin: 0 0 18px;
    color: var(--text-2);
    font-size: 15px;
  }
  .text-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: gap .2s ease;
  }
  .text-link:hover {
    gap: 9px;
  }

  .side-ribbon {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    justify-content: center;
    border-top: 4px solid var(--primary);
    transition: box-shadow .25s ease, transform .25s ease;
  }
  .side-ribbon:hover {
    box-shadow: var(--shadow-up);
    transform: translateY(-2px);
  }
  .mini-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 10px 0 20px;
  }
  .mini-list li {
    display: flex;
    gap: 10px;
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.7;
  }
  .mini-list i {
    flex: 0 0 6px;
    width: 6px;
    height: 6px;
    background: var(--secondary);
    border-radius: 50%;
    margin-top: 11px;
  }

  .ribbon-dark {
    background: var(--primary-dark);
    color: #fff;
    border-radius: var(--radius);
    padding: 34px 36px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    position: relative;
    overflow: hidden;
  }
  .ribbon-dark h3 {
    margin: 0 0 6px;
    color: #fff;
    font-size: 22px;
  }
  .ribbon-dark p {
    margin: 0;
    color: #c3dcd8;
    font-size: 15px;
    max-width: 640px;
  }
  .ribbon-dark::after {
    content: '';
    position: absolute;
    right: -60px;
    top: -60px;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    border: 34px solid rgba(201, 151, 93, .2);
  }

  .scene-list {
    border-top: 1px solid var(--line);
  }
  .scene-row {
    display: grid;
    grid-template-columns: 90px 1fr auto;
    gap: 20px;
    align-items: center;
    border-bottom: 1px solid var(--line);
    padding: 28px 0;
    transition: background .2s ease;
    padding-left: 14px;
    padding-right: 14px;
    border-radius: 14px;
  }
  .scene-row:hover {
    background: #f0f6f5;
  }
  .scene-num {
    font-size: 15px;
    font-weight: 700;
    color: var(--secondary);
    letter-spacing: .05em;
  }
  .scene-row h3 {
    margin: 0 0 5px;
    font-size: 19px;
    font-weight: 600;
    color: var(--text);
  }
  .scene-row p {
    margin: 0;
    color: var(--text-2);
    font-size: 15px;
    line-height: 1.8;
  }
  .scene-entry {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
    transition: gap .2s;
  }
  .scene-entry:hover {
    gap: 8px;
  }
  @media (max-width: 760px) {
    .scene-row {
      grid-template-columns: 1fr;
      gap: 8px;
      padding: 22px 6px;
    }
    .scene-entry {
      margin-top: 8px;
    }
    .check-li {
      grid-template-columns: 44px 1fr;
      padding: 18px 6px;
    }
    .arrow-link {
      display: none;
    }
  }

  .steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    counter-reset: step;
  }
  .step-item {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 28px 24px;
    position: relative;
    box-shadow: var(--shadow);
  }
  .step-item::before {
    counter-increment: step;
    content: '0' counter(step);
    display: block;
    font-weight: 700;
    font-size: 30px;
    letter-spacing: -.02em;
    color: rgba(14, 110, 102, .18);
    line-height: 1;
    margin-bottom: 22px;
  }
  .step-item::after {
    content: '→';
    position: absolute;
    right: -17px;
    top: 30px;
    z-index: 2;
    color: var(--secondary);
    font-size: 20px;
    background: var(--bg);
    border-radius: 50%;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line);
  }
  .step-item:last-child::after {
    display: none;
  }
  .step-item h3 {
    margin: 0 0 8px;
    font-size: 18px;
    color: var(--text);
  }
  .step-item p {
    margin: 0;
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.8;
  }
  @media (max-width: 960px) {
    .steps-grid {
      grid-template-columns: 1fr 1fr;
    }
    .step-item:nth-child(2)::after {
      display: none;
    }
  }
  @media (max-width: 520px) {
    .steps-grid {
      grid-template-columns: 1fr;
    }
    .step-item::after {
      display: none !important;
    }
  }

  .faq-item {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    box-shadow: var(--shadow);
    margin-bottom: 12px;
    transition: box-shadow .2s;
  }
  .faq-item:hover {
    box-shadow: var(--shadow-up);
  }
  .faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 22px;
    cursor: pointer;
    list-style: none;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
  }
  .faq-item summary::-webkit-details-marker {
    display: none;
  }
  .faq-item summary::after {
    content: '';
    flex: 0 0 10px;
    width: 10px;
    height: 10px;
    border-right: 2px solid var(--primary);
    border-bottom: 2px solid var(--primary);
    transform: rotate(45deg);
    transition: transform .25s;
  }
  .faq-item[open] summary::after {
    transform: rotate(225deg);
  }
  .faq-content {
    padding: 0 22px 22px;
    font-size: 15px;
    line-height: 1.9;
    color: var(--text-2);
  }

  .cta-block {
    background: #f0f6f5;
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: 44px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    position: relative;
    overflow: hidden;
  }
  .cta-block::after {
    content: '';
    position: absolute;
    right: -30px;
    bottom: -30px;
    width: 160px;
    height: 160px;
    background: rgba(14, 110, 102, .08);
    border-radius: 50%;
  }
  .cta-block h2 {
    margin: 0 0 8px;
    font-size: 26px;
    color: var(--text);
    letter-spacing: -.01em;
  }
  .cta-block p {
    margin: 0;
    color: var(--text-2);
    max-width: 620px;
    font-size: 15px;
  }
  .cta-actions {
    display: flex;
    gap: 12px;
    position: relative;
    z-index: 2;
    flex-wrap: wrap;
  }
  @media (max-width: 680px) {
    .cta-block {
      padding: 28px 22px;
    }
    .cta-actions .btn {
      width: 100%;
    }
  }

/* roulang page: category2 */
:root {
        --brand: #0E6B66;
        --brand-dark: #094D49;
        --brand-deeper: #073633;
        --accent: #C69E53;
        --accent-soft: #F4ECDD;
        --bg: #F5F9F9;
        --bg-card: #FFFFFF;
        --text: #1F3030;
        --muted: #667C7C;
        --line: #DCE9E7;
        --radius-lg: 20px;
        --radius-md: 14px;
        --radius-sm: 10px;
        --shadow-sm: 0 1px 2px rgba(17, 46, 44, 0.04), 0 8px 24px rgba(17, 46, 44, 0.04);
        --shadow-md: 0 2px 4px rgba(17, 46, 44, 0.04), 0 14px 36px rgba(17, 46, 44, 0.08);
        --space-section: 100px;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        margin: 0;
        font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
        background: var(--bg);
        color: var(--text);
        line-height: 1.7;
        -webkit-font-smoothing: antialiased;
        text-rendering: optimizeLegibility;
    }

    body.page-category {
        --page-top-space: 0px;
    }

    img {
        max-width: 100%;
        height: auto;
        display: block;
    }

    a {
        color: inherit;
        text-decoration: none;
    }

    ul,
    ol {
        list-style: none;
        margin: 0;
        padding: 0;
    }

    h1,
    h2,
    h3,
    h4,
    p {
        margin-top: 0;
    }

    h1,
    h2,
    h3 {
        line-height: 1.25;
        font-weight: 700;
        color: var(--text);
    }

    .container {
        max-width: 1220px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 24px;
        padding-right: 24px;
    }

    .container-narrow {
        max-width: 880px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 24px;
        padding-right: 24px;
    }

    .section {
        padding-top: var(--space-section);
        padding-bottom: var(--space-section);
    }

    .section-tight {
        padding-top: 68px;
        padding-bottom: 68px;
    }

    .section-head {
        max-width: 760px;
        margin-bottom: 50px;
    }

    .section-head.center {
        margin-left: auto;
        margin-right: auto;
        text-align: center;
    }

    .eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        font-weight: 600;
        letter-spacing: 0.06em;
        color: var(--brand);
        margin-bottom: 14px;
    }

    .eyebrow::before {
        content: "";
        width: 22px;
        height: 2px;
        border-radius: 2px;
        background: var(--accent);
        display: inline-block;
    }

    .section-head.center .eyebrow::after {
        content: "";
        width: 22px;
        height: 2px;
        border-radius: 2px;
        background: var(--accent);
        display: inline-block;
    }

    .section-head h2 {
        font-size: clamp(28px, 4vw, 38px);
        line-height: 1.25;
        margin-bottom: 14px;
        letter-spacing: -0.01em;
    }

    .section-head p {
        color: var(--muted);
        font-size: 16px;
        margin-bottom: 0;
    }

    .text-muted {
        color: var(--muted);
    }

    /* ---------- Header ---------- */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(250, 253, 253, 0.9);
        -webkit-backdrop-filter: blur(16px);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--line);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        min-height: 72px;
        gap: 28px;
    }

    .brand-lockup {
        display: inline-flex;
        align-items: center;
        gap: 11px;
        flex-shrink: 0;
    }

    .brand-mark {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        background: var(--brand-deeper);
        color: #ffffff;
        border-radius: 12px;
        font-weight: 800;
        font-size: 16px;
        letter-spacing: 0.02em;
        box-shadow: 0 10px 18px rgba(13, 66, 63, 0.16);
    }

    .brand-text {
        display: flex;
        flex-direction: column;
        line-height: 1.2;
    }

    .brand-text strong {
        font-size: 16px;
        font-weight: 700;
        color: var(--brand-dark);
        letter-spacing: 0.02em;
    }

    .brand-text em {
        font-style: normal;
        font-size: 12px;
        color: var(--muted);
        letter-spacing: 0.06em;
        margin-top: 2px;
    }

    .nav-menu {
        display: flex;
        align-items: center;
        gap: 32px;
        margin-left: auto;
    }

    .nav-link {
        position: relative;
        display: inline-flex;
        align-items: center;
        padding: 24px 0 22px;
        font-size: 15px;
        font-weight: 500;
        color: #385052;
        transition: color 0.2s ease;
    }

    .nav-link::after {
        content: "";
        position: absolute;
        left: 0;
        right: 100%;
        bottom: 13px;
        height: 2px;
        border-radius: 3px;
        background: var(--brand);
        transition: right 0.24s ease;
    }

    .nav-link:hover {
        color: var(--brand);
    }

    .nav-link:hover::after,
    .nav-link.is-active::after {
        right: 0;
    }

    .nav-link.is-active {
        color: var(--brand-dark);
        font-weight: 600;
    }

    .header-act {
        flex-shrink: 0;
        display: block;
    }

    .btn-mini {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        height: 40px;
        min-width: 106px;
        padding: 0 18px;
        background: var(--brand-dark);
        color: #fff;
        font-size: 14px;
        font-weight: 600;
        border-radius: 11px;
        transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
        box-shadow: 0 8px 18px rgba(9, 77, 73, 0.14);
    }

    .btn-mini:hover {
        background: #0e5e59;
        transform: translateY(-1px);
        box-shadow: 0 12px 24px rgba(9, 77, 73, 0.18);
    }

    .btn-mini:active {
        transform: translateY(0);
    }

    .nav-check,
    .nav-toggle {
        display: none;
    }

    /* ---------- Buttons ---------- */
    .btn-group {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
        align-items: center;
    }

    .btn-primary,
    .btn-secondary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        height: 50px;
        padding: 0 26px;
        border-radius: 12px;
        font-size: 15px;
        font-weight: 600;
        transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
        cursor: pointer;
        border: 1px solid transparent;
    }

    .btn-primary {
        background: var(--brand-dark);
        color: #ffffff;
        box-shadow: 0 14px 26px rgba(9, 77, 73, 0.16);
    }

    .btn-primary:hover {
        background: #0d615c;
        transform: translateY(-2px);
        box-shadow: 0 18px 32px rgba(9, 77, 73, 0.18);
    }

    .btn-secondary {
        background: var(--bg-card);
        color: var(--brand-dark);
        border-color: var(--line);
        box-shadow: 0 2px 8px rgba(18, 43, 42, 0.04);
    }

    .btn-secondary:hover {
        border-color: #BFD3D0;
        transform: translateY(-2px);
        box-shadow: var(--shadow-sm);
    }

    .btn-light {
        background: #ffffff;
        color: var(--brand-dark);
        box-shadow: 0 14px 24px rgba(7, 36, 34, 0.12);
    }

    .btn-light:hover {
        transform: translateY(-2px);
        background: #F2F7F6;
        box-shadow: 0 18px 30px rgba(7, 36, 34, 0.16);
    }

    /* ---------- Category hero ---------- */
    .cat-hero {
        position: relative;
        border-bottom: 1px solid var(--line);
        background-color: #EAF3F1;
        background-image: url('/assets/images/backpic/back-2.webp');
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
        overflow: hidden;
    }

    .cat-hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background: rgba(237, 247, 245, 0.72);
        background: linear-gradient(90deg, rgba(236, 247, 245, 0.96) 0%, rgba(236, 247, 245, 0.9) 46%, rgba(236, 247, 245, 0.62) 100%);
    }

    .cat-hero-inner {
        position: relative;
        z-index: 2;
        display: grid;
        grid-template-columns: 1.25fr 0.75fr;
        gap: 60px;
        padding-top: 74px;
        padding-bottom: 78px;
        align-items: center;
    }

    .cat-hero-copy {
        max-width: 700px;
    }

    .cat-hero-copy .kicker {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(255, 255, 255, 0.62);
        border: 1px solid rgba(14, 107, 102, 0.18);
        color: var(--brand-dark);
        border-radius: 999px;
        padding: 6px 14px;
        font-size: 13px;
        font-weight: 600;
        margin-bottom: 22px;
    }

    .cat-hero-copy h1 {
        font-size: clamp(33px, 4.6vw, 50px);
        line-height: 1.15;
        letter-spacing: -0.025em;
        margin-bottom: 20px;
        color: var(--brand-deeper);
        text-wrap: balance;
    }

    .cat-hero-copy h1 span {
        display: block;
        color: var(--brand-dark);
    }

    .cat-hero-copy .lead {
        font-size: 16px;
        line-height: 1.85;
        color: #435A59;
        max-width: 630px;
        margin-bottom: 30px;
    }

    .map-summary-panel {
        background: rgba(255, 255, 255, 0.88);
        -webkit-backdrop-filter: blur(6px);
        backdrop-filter: blur(6px);
        border: 1px solid rgba(255, 255, 255, 0.6);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-md);
        padding: 26px 24px 22px;
    }

    .map-summary-title {
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 16px;
        font-weight: 700;
        color: var(--brand-deeper);
        padding-bottom: 12px;
        border-bottom: 1px solid var(--line);
        margin-bottom: 18px;
    }

    .map-summary-title em {
        font-style: normal;
        font-weight: 400;
        font-size: 12px;
        color: var(--muted);
    }

    .map-chips {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }

    .map-chips span {
        border-radius: 999px;
        background: #EAF3F1;
        border: 1px solid #D5E5E2;
        color: #25524F;
        padding: 6px 13px;
        font-size: 13px;
        font-weight: 500;
    }

    .map-summary-tip {
        margin-top: 22px;
        border-radius: 12px;
        background: #F7F3E8;
        border-left: 4px solid var(--accent);
        padding: 12px 14px;
        color: #616033;
        font-size: 13px;
        line-height: 1.6;
    }

    /* ---------- Content grid common ---------- */
    .content-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 52px;
        align-items: center;
    }

    .content-grid.flip .grid-image {
        order: 2;
    }

    .grid-copy h3 {
        font-size: 23px;
        line-height: 1.35;
        margin-bottom: 12px;
    }

    .grid-copy p {
        color: var(--muted);
        margin-bottom: 18px;
    }

    .grid-copy ul.feature-list {
        display: grid;
        gap: 14px;
    }

    .feature-list li {
        position: relative;
        padding-left: 26px;
        color: #3B504F;
        font-size: 15px;
        line-height: 1.65;
    }

    .feature-list li::before {
        content: "";
        position: absolute;
        top: 9px;
        left: 2px;
        width: 13px;
        height: 13px;
        border-radius: 4px;
        background: #D6EAE6;
    }

    .feature-list li::after {
        content: "";
        position: absolute;
        top: 13px;
        left: 6px;
        width: 5px;
        height: 5px;
        border-radius: 2px;
        background: var(--brand);
    }

    .grid-image-wrap {
        border-radius: 22px;
        overflow: hidden;
        background: #E6F0EE;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--line);
        min-height: 360px;
    }

    .grid-image-wrap img {
        width: 100%;
        height: 460px;
        object-fit: cover;
        transition: transform 0.5s ease;
    }

    .grid-image-wrap:hover img {
        transform: scale(1.03);
    }

    /* ---------- Layer / route lists ---------- */
    .route-layout {
        display: grid;
        grid-template-columns: 1.5fr 0.75fr;
        gap: 46px;
        align-items: start;
    }

    .layer-list {
        display: grid;
    }

    .layer-item {
        display: grid;
        grid-template-columns: 72px 1fr;
        column-gap: 24px;
        padding: 28px 4px;
        border-bottom: 1px solid var(--line);
        transition: background 0.2s ease;
    }

    .layer-item:first-child {
        border-top: 1px solid var(--line);
    }

    .layer-index {
        font-family: "SFMono-Regular", Consolas, monospace;
        font-size: 14px;
        color: #9AB3B0;
        letter-spacing: 0.04em;
        padding-top: 5px;
    }

    .layer-main h3 {
        font-size: 18px;
        margin-bottom: 6px;
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 10px;
    }

    .layer-main h3 .tag {
        font-size: 12px;
        font-weight: 500;
        color: #0B625C;
        background: #E8F4F1;
        border-radius: 6px;
        padding: 2px 9px;
    }

    .layer-main p {
        margin-bottom: 8px;
        color: #5B6F6E;
        font-size: 15px;
        max-width: 720px;
    }

    .layer-links {
        display: flex;
        flex-wrap: wrap;
        gap: 6px 18px;
        font-size: 14px;
        margin-top: 5px;
    }

    .layer-links a {
        color: var(--brand);
        font-weight: 500;
        position: relative;
    }

    .layer-links a::after {
        content: "";
        position: absolute;
        bottom: -2px;
        left: 0;
        right: 100%;
        height: 1px;
        background: var(--brand);
        transition: right 0.2s ease;
    }

    .layer-links a:hover {
        color: var(--brand-dark);
    }

    .layer-links a:hover::after {
        right: 0;
    }

    .note-panel {
        position: sticky;
        top: 96px;
        background: var(--bg-card);
        border: 1px solid var(--line);
        border-radius: 20px;
        padding: 28px 24px;
        box-shadow: var(--shadow-sm);
    }

    .note-panel h3 {
        font-size: 17px;
        margin-bottom: 14px;
    }

    .note-panel p {
        font-size: 14px;
        color: var(--muted);
        line-height: 1.8;
        margin-bottom: 12px;
    }

    .note-panel p:last-child {
        margin-bottom: 0;
    }

    /* ---------- Journey dark step ---------- */
    .journey-dark {
        border-radius: 28px;
        background: var(--brand-deeper);
        background-image: url('/assets/images/backpic/back-3.png');
        background-size: cover;
        background-position: center;
        position: relative;
        overflow: hidden;
        padding: 68px 6%;
        color: #C6DAD7;
    }

    .journey-dark::before {
        content: "";
        position: absolute;
        inset: 0;
        background: rgba(5, 40, 38, 0.86);
    }

    .journey-inner {
        position: relative;
        z-index: 2;
    }

    .journey-head {
        display: flex;
        flex-direction: column;
        gap: 8px;
        margin-bottom: 50px;
    }

    .journey-head .eyebrow {
        color: #D9C493;
    }

    .journey-head .eyebrow::before,
    .journey-head .eyebrow::after {
        background: #D9C493;
    }

    .journey-head h2 {
        color: #fff;
        font-size: clamp(28px, 4vw, 36px);
        letter-spacing: -0.02em;
        max-width: 520px;
    }

    .journey-steps {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .journey-step {
        border-radius: 20px;
        background: rgba(255, 255, 255, 0.07);
        border: 1px solid rgba(255, 255, 255, 0.12);
        padding: 26px 24px;
        min-height: 160px;
        transition: background 0.25s ease, transform 0.25s ease;
    }

    .journey-step:hover {
        background: rgba(255, 255, 255, 0.12);
        transform: translateY(-2px);
    }

    .journey-num {
        font-family: "SFMono-Regular", Consolas, monospace;
        font-size: 13px;
        letter-spacing: 0.12em;
        color: #C7A76A;
        margin-bottom: 16px;
    }

    .journey-step h3 {
        color: #fff;
        font-size: 18px;
        margin-bottom: 10px;
    }

    .journey-step p {
        color: #BCD4D0;
        font-size: 14px;
        margin-bottom: 0;
        line-height: 1.8;
    }

    /* ---------- Access difference row ---------- */
    .diff-rows {
        display: grid;
        background: #ffffff;
        border: 1px solid var(--line);
        border-radius: 22px;
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        margin-top: 34px;
    }

    .diff-rows .row {
        display: grid;
        grid-template-columns: 190px 1fr 220px;
        gap: 30px;
        align-items: center;
        padding: 24px 30px;
        border-bottom: 1px solid var(--line);
        transition: background 0.2s ease;
    }

    .diff-rows .row:last-child {
        border-bottom: 0;
    }

    .diff-rows .row:hover {
        background: #F3F9F8;
    }

    .row-label h4 {
        font-size: 16px;
        font-weight: 600;
        margin-bottom: 4px;
        color: var(--brand-dark);
    }

    .row-label span {
        font-size: 13px;
        color: var(--muted);
    }

    .row-desc {
        font-size: 14px;
        color: #4E6261;
        line-height: 1.75;
    }

    .row-link {
        text-align: right;
    }

    .row-link a {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        font-weight: 600;
        color: var(--brand);
    }

    .row-link a svg {
        transition: transform 0.2s ease;
    }

    .row-link a:hover svg {
        transform: translateX(4px);
    }

    /* ---------- Info band ---------- */
    .info-band {
        display: grid;
        grid-template-columns: 42% 1fr;
        gap: 52px;
        align-items: center;
        background: #E7F2F0;
        border: 1px solid #D3E5E2;
        border-radius: 28px;
        overflow: hidden;
        padding: 0;
        box-shadow: var(--shadow-sm);
    }

    .info-band-image {
        align-self: stretch;
        min-height: 390px;
        background: #d2e6e2;
    }

    .info-band-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        min-height: 390px;
    }

    .info-band-content {
        padding: 48px 44px 44px 0;
    }

    .info-band-content .eyebrow {
        color: var(--brand);
    }

    .info-band-content h2 {
        font-size: clamp(26px, 3.4vw, 34px);
        margin-bottom: 14px;
        line-height: 1.3;
    }

    .info-band-content p {
        color: #506361;
        font-size: 15px;
        line-height: 1.85;
        margin-bottom: 18px;
    }

    .info-list {
        display: grid;
        gap: 10px;
    }

    .info-list li {
        position: relative;
        padding-left: 22px;
        font-size: 15px;
        color: #2E4846;
    }

    .info-list li::before {
        content: "→";
        position: absolute;
        left: 0;
        color: var(--brand);
        font-weight: 600;
    }

    /* ---------- FAQ ---------- */
    .faq-block {
        max-width: 880px;
        margin-left: auto;
        margin-right: auto;
    }

    .faq-item {
        border-bottom: 1px solid var(--line);
        background: transparent;
        transition: background 0.2s ease;
    }

    .faq-item:first-child {
        border-top: 1px solid var(--line);
    }

    .faq-item details {
        border-radius: 0;
    }

    .faq-item summary {
        display: grid;
        grid-template-columns: 1fr 32px;
        gap: 18px;
        align-items: center;
        padding: 22px 4px;
        cursor: pointer;
        font-size: 16px;
        font-weight: 600;
        color: #203a38;
        transition: color 0.2s ease;
    }

    .faq-item summary:hover {
        color: var(--brand-dark);
    }

    .faq-item summary::-webkit-details-marker {
        display: none;
    }

    .faq-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 28px;
        height: 28px;
        border-radius: 50%;
        border: 1px solid var(--line);
        background: #ffffff;
        color: var(--brand);
        font-size: 18px;
        font-weight: 300;
        line-height: 1;
        transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
        position: relative;
    }

    .faq-icon::before,
    .faq-icon::after {
        content: "";
        position: absolute;
        background: currentColor;
        border-radius: 2px;
        transition: opacity 0.2s ease;
    }

    .faq-icon::before {
        width: 10px;
        height: 1.6px;
    }

    .faq-icon::after {
        width: 1.6px;
        height: 10px;
    }

    details[open] .faq-icon {
        transform: rotate(180deg);
        background: var(--brand-dark);
        color: #ffffff;
        border-color: var(--brand-dark);
    }

    details[open] .faq-icon::after {
        opacity: 0;
    }

    .faq-answer {
        padding: 0 4px 24px;
        color: #5a6d6c;
        font-size: 15px;
        line-height: 1.9;
        max-width: 780px;
    }

    .faq-answer a {
        color: var(--brand);
        font-weight: 600;
    }

    /* ---------- Bottom CTA ---------- */
    .cta-band {
        border-radius: 28px;
        background: var(--brand-deeper);
        padding: 60px 6%;
        margin-top: 20px;
        color: #ffffff;
        position: relative;
        overflow: hidden;
    }

    .cta-band::after {
        content: "";
        position: absolute;
        right: -80px;
        top: -100px;
        width: 300px;
        height: 300px;
        border-radius: 50%;
        background: rgba(198, 158, 83, 0.12);
        pointer-events: none;
    }

    .cta-band h2 {
        color: #ffffff;
        font-size: clamp(25px, 3vw, 33px);
        margin-bottom: 12px;
    }

    .cta-band p {
        color: #BCD7D2;
        max-width: 650px;
        font-size: 15px;
        line-height: 1.8;
        margin-bottom: 24px;
    }

    .cta-band .btn-group {
        margin-bottom: 8px;
    }

    /* ---------- Footer ---------- */
    .site-footer {
        background: #072B29;
        color: #AFC4C0;
        margin-top: 100px;
        font-size: 14px;
        line-height: 1.7;
    }

    .footer-main {
        padding-top: 64px;
        padding-bottom: 40px;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 0.8fr 0.8fr 0.9fr;
        gap: 50px;
    }

    .footer-brand p {
        color: #9BBBB6;
        max-width: 360px;
        line-height: 1.9;
        margin-bottom: 0;
    }

    .footer-cols {
        display: grid;
        align-content: start;
        gap: 10px;
    }

    .f-title {
        color: #e4f1ee;
        font-weight: 600;
        margin-bottom: 10px;
    }

    .footer-cols a {
        color: #AFC4C0;
        transition: color 0.2s ease;
        width: fit-content;
    }

    .footer-cols a:hover {
        color: #d5e8e4;
    }

    .footer-bottom {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        gap: 10px;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-top: 24px;
        padding-bottom: 30px;
        color: #7FA09B;
        font-size: 13px;
    }

    .footer-bottom a {
        color: inherit;
    }

    /* ---------- Focus ---------- */
    a:focus-visible,
    summary:focus-visible,
    button:focus-visible {
        outline: 2px solid #C69E53;
        outline-offset: 3px;
        border-radius: 6px;
    }

    /* ---------- Responsive ---------- */
    @media (max-width: 1080px) {
        .cat-hero-inner {
            grid-template-columns: 1fr;
            gap: 34px;
            padding-top: 52px;
            padding-bottom: 56px;
        }

        .map-summary-panel {
            max-width: 660px;
        }

        .content-grid {
            grid-template-columns: 1fr;
            gap: 32px;
        }

        .content-grid.flip .grid-image {
            order: 0;
        }

        .grid-image-wrap img {
            height: 380px;
        }

        .route-layout {
            grid-template-columns: 1fr;
            gap: 34px;
        }

        .note-panel {
            position: static;
        }

        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 36px;
        }
    }

    @media (max-width: 900px) {
        :root {
            --space-section: 72px;
        }

        .site-header {
            height: auto;
        }

        .header-inner {
            min-height: 64px;
            flex-wrap: wrap;
        }

        .nav-toggle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            margin-left: auto;
            color: var(--brand-dark);
            border: 1px solid var(--line);
            border-radius: 12px;
            background: #fff;
            cursor: pointer;
        }

        .nav-check {
            display: none;
        }

        .header-act {
            display: none;
        }

        .nav-menu {
            display: none;
            width: 100%;
            flex-direction: column;
            align-items: flex-start;
            gap: 4px;
            padding: 8px 4px 20px;
            border-top: 1px solid var(--line);
            background: #fbfdfd;
            margin-left: 0;
        }

        .nav-link {
            padding: 13px 0;
            width: 100%;
            font-size: 16px;
        }

        .nav-link::after {
            bottom: 8px;
        }

        .nav-check:checked~.nav-menu {
            display: flex;
        }

        .nav-check:checked~.nav-toggle svg {
            transform: rotate(180deg);
        }

        .diff-rows .row {
            grid-template-columns: 1fr;
            gap: 14px;
            padding: 22px;
        }

        .row-link {
            text-align: left;
        }

        .journey-steps {
            grid-template-columns: 1fr;
        }

        .info-band {
            grid-template-columns: 1fr;
            padding: 0;
        }

        .info-band-content {
            padding: 30px 28px 34px;
            order: 1;
        }

        .info-band-image {
            min-height: 260px;
            order: 0;
        }

        .info-band-image img {
            min-height: 260px;
            aspect-ratio: 16 / 10;
        }

        .cta-band {
            padding: 46px 24px;
        }

        .footer-main {
            padding-top: 48px;
        }
    }

    @media (max-width: 600px) {
        :root {
            --space-section: 60px;
        }

        .container {
            padding-left: 16px;
            padding-right: 16px;
        }

        .section-head {
            margin-bottom: 32px;
        }

        .btn-primary,
        .btn-secondary {
            width: 100%;
            height: 48px;
        }

        .btn-group {
            width: 100%;
        }

        .cat-hero-copy h1 {
            font-size: 34px;
        }

        .cat-hero-copy .lead {
            font-size: 15px;
        }

        .map-summary-panel {
            padding: 18px 16px;
        }

        .layer-item {
            grid-template-columns: 44px 1fr;
            column-gap: 14px;
            padding: 22px 0;
        }

        .layer-index {
            font-size: 12px;
        }

        .layer-main h3 {
            font-size: 17px;
        }

        .card-split {
            grid-template-columns: 1fr;
        }

        .footer-grid {
            grid-template-columns: 1fr;
            gap: 30px;
        }

        .footer-bottom {
            flex-direction: column;
            align-items: flex-start;
            gap: 4px;
            font-size: 12px;
        }

        .journey-dark {
            border-radius: 20px;
            padding: 48px 20px;
        }

        .faq-item summary {
            font-size: 15px;
            padding: 18px 0;
            grid-template-columns: 1fr 28px;
        }

        .faq-answer {
            line-height: 1.8;
        }

        .cta-band {
            border-radius: 20px;
        }

        .site-footer {
            margin-top: 68px;
        }
    }

    @media (max-width: 480px) {
        .grid-image-wrap {
            min-height: 260px;
        }

        .grid-image-wrap img {
            height: 300px;
        }

        .journey-step {
            padding: 20px 16px;
        }

        .info-band-image {
            min-height: 220px;
        }

        .info-band-image img {
            min-height: 220px;
        }

        .brand-text strong {
            font-size: 15px;
        }

        .brand-text em {
            font-size: 11px;
        }
    }

/* roulang page: category3 */
:root {
  --primary: #146B67;
  --primary-strong: #0E4F4C;
  --primary-soft: #E0F0EE;
  --teal-deep: #8FCBC3;
  --sand: #B58B3B;
  --sand-soft: #F3E9D7;
  --bg-page: #F5F8F9;
  --bg-card: #FFFFFF;
  --border: #E3ECEC;
  --text: #25333A;
  --text-muted: #758287;
  --radius: 18px;
  --radius-inner: 12px;
  --shadow-card: 0 1px 2px rgba(20, 107, 103, 0.05), 0 14px 34px rgba(20, 107, 103, 0.06);
  --shadow-hover: 0 3px 6px rgba(20, 107, 103, 0.08), 0 18px 44px rgba(20, 107, 103, 0.12);
}
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--body, ui-sans-serif, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}
*, *:before, *:after { box-sizing: border-box; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease; }
button { font: inherit; cursor: pointer; }
.wrap { width: 100%; max-width: 1200px; margin-left: auto; margin-right: auto; padding-left: 24px; padding-right: 24px; }
@media (min-width: 640px) {
  .wrap { padding-left: 28px; padding-right: 28px; }
}
@media (max-width: 560px) {
  .wrap { padding-left: 16px; padding-right: 16px; }
}
.eye-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary-soft);
  color: var(--primary-strong);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  padding: 7px 13px;
  border-radius: 999px;
  line-height: 1.4;
}
.eye-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(252, 254, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  position: relative;
}
.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(145deg, var(--primary), var(--primary-strong));
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: -.02em;
  box-shadow: 0 8px 18px rgba(20, 107, 103, .22);
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand-text strong {
  color: var(--primary-strong);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .02em;
}
.brand-text em {
  display: inline-block;
  font-style: normal;
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 500;
  margin-top: 3px;
  letter-spacing: .12em;
}
.nav-check { position: absolute; opacity: 0; pointer-events: none; }
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
  color: var(--text);
  transition: all .2s ease;
}
.nav-toggle:hover { border-color: var(--primary); background: var(--primary-soft); }
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  flex-wrap: wrap;
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 10px 15px;
  color: #45565E;
  font-size: 14.5px;
  font-weight: 600;
  border-radius: 10px;
  letter-spacing: .01em;
  transition: color .2s ease, background-color .2s ease;
}
.nav-link:hover,
.nav-link:focus-visible {
  color: var(--primary-strong);
  background: rgba(20, 107, 103, .05);
  outline: none;
}
.nav-link.is-active { color: var(--primary); }
.nav-link.is-active:after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 4px;
  height: 2px;
  border-radius: 4px;
  background: var(--primary);
}
.header-act { flex-shrink: 0; }
.btn-mini {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--primary);
  transition: all .2s ease;
  white-space: nowrap;
}
.btn-mini:hover {
  background: var(--primary-strong);
  border-color: var(--primary-strong);
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(20, 107, 103, .22);
}
.btn-mini:focus-visible { outline: 3px solid rgba(20,107,103,.28); outline-offset: 2px; }

/* ===== Hero ===== */
.hero {
  position: relative;
  background: url('/assets/images/backpic/back-2.webp') no-repeat center center / cover;
  background-color: #071C1E;
  background-blend-mode: soft-light;
  isolation: isolate;
  min-height: 560px;
  display: flex;
  align-items: center;
  padding: 104px 0 76px;
  overflow: hidden;
}
.hero:before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse at 78% 20%, rgba(143, 203, 195, .18), transparent 44%),
    linear-gradient(100deg, rgba(5, 24, 27, .92) 0%, rgba(6, 39, 43, .76) 46%, rgba(8, 58, 59, .42) 100%);
}
.hero-inner { position: relative; z-index: 2; max-width: 920px; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.22);
  color: #D7F2EE;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: .02em;
  backdrop-filter: blur(4px);
}
.hero-title {
  color: #fff;
  font-size: clamp(34px, 6.2vw, 58px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 22px 0 0;
}
.hero-title .line-bg {
  display: block;
  color: #BDE8DF;
}
.hero-sub {
  margin-top: 20px;
  color: #CFE6EA;
  font-size: 17px;
  line-height: 1.9;
  max-width: 700px;
  font-weight: 400;
}
.hero-actions { margin-top: 36px; display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.btn-hero {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 50px;
  padding: 0 25px;
  background: #FFF;
  color: var(--primary-strong);
  border-radius: 12px;
  font-weight: 700;
  font-size: 15px;
  border: 1px solid transparent;
  transition: all .2s ease;
  box-shadow: 0 8px 22px rgba(0,0,0,.12);
}
.btn-hero:hover {
  background: var(--primary-soft);
  transform: translateY(-2px);
  box-shadow: 0 14px 26px rgba(0,0,0,.16);
}
.btn-hero-ghost {
  display: inline-flex;
  align-items: center;
  height: 50px;
  padding: 0 24px;
  border: 1px solid rgba(255,255,255,.35);
  color: #F0FBF9;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  backdrop-filter: blur(4px);
}
.btn-hero-ghost:hover {
  border-color: #FFF;
  background: rgba(255,255,255,.12);
}
.hero-meta {
  margin-top: 74px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.hero-metric {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.18);
  padding: 12px 16px;
  border-radius: 14px;
  color: #fff;
  min-width: 142px;
  backdrop-filter: blur(4px);
}
.hero-metric strong { font-size: 22px; color: #C4F0E8; display: block; line-height: 1.2; }
.hero-metric span { display: block; font-size: 12.5px; color: #C1DAE0; margin-top: 4px; }

/* ===== Section base ===== */
.section { padding: 96px 0; }
.section.tint { background: #F1F6F6; }
.section-deep { background: #0A282E; color: #D9E9EC; }
.sec-header { max-width: 760px; margin-bottom: 54px; }
.sec-header.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  margin-bottom: 12px;
}
.sec-title {
  font-size: clamp(26px, 4.4vw, 38px);
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: #132A30;
  font-weight: 800;
  margin: 0;
}
.section-deep .sec-title, .section-deep .sec-kicker { color: #fff; }
.sec-lead {
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.9;
}
.section-deep .sec-lead { color: #AFCDD2; }

/* ===== Guide split ===== */
.guide-panel {
  display: grid;
  grid-template-columns: 440px minmax(0, 1fr);
  gap: 70px;
  align-items: stretch;
}
.guide-sticky .sticky-wrap { position: sticky; top: 120px; }
.nav-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 28px;
}
.nav-list a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--text);
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0);
  transition: gap .2s;
}
.nav-list a i {
  width: 6px;
  height: 6px;
  border-radius: 99px;
  background: var(--teal-deep);
}
.nav-list a:hover { gap: 16px; color: var(--primary); }
.device-stack { display: flex; flex-direction: column; gap: 20px; }
.device-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 28px 30px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 22px;
  align-items: start;
  transition: all .22s ease;
}
.device-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.device-no {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--primary-soft);
  color: var(--primary-strong);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 17px;
}
.device-card h3 { margin: 2px 0 6px; font-size: 20px; color: #122A30; font-weight: 800; }
.device-card p { margin: 8px 0 12px; color: var(--text-muted); font-size: 15px; line-height: 1.85; }
.device-tip {
  display: inline-flex;
  align-items: flex-start;
  gap: 8px;
  background: #F7F9F9;
  border-left: 3px solid var(--teal-deep);
  padding: 8px 12px;
  border-radius: 0 10px 10px 0;
  color: #3C4F57;
  font-size: 13.5px;
}
.device-tip svg { flex-shrink: 0; margin-top: 3px; color: var(--primary); }
.device-link-more {
  grid-row: 1 / 4;
  grid-column: 3;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
  font-size: 13.5px;
  white-space: nowrap;
  border: 1px solid rgba(20,107,103,.22);
  border-radius: 10px;
  padding: 8px 14px;
  transition: all .2s;
}
.device-link-more:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  transform: translateX(2px);
}

/* ===== Deep process ===== */
.proc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  counter-reset: proc-item;
}
.proc-card {
  counter-increment: proc-item 1;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 20px;
  padding: 26px 22px 24px;
  position: relative;
  overflow: hidden;
}
.proc-card:before {
  content: "0" counter(proc-item);
  position: absolute;
  right: 16px;
  top: 14px;
  font-size: 46px;
  font-weight: 900;
  color: rgba(255,255,255,.05);
  line-height: 1;
  font-family: Georgia, sans-serif;
}
.proc-ic {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: #1E5A5B;
  display: grid;
  place-items: center;
  color: #A9E0D5;
}
.proc-card h3 { color: #f4fbfa; font-size: 18px; font-weight: 700; margin: 22px 0 10px; }
.proc-card p { color: #B5D0D5; font-size: 14px; line-height: 1.85; }

/* ===== Resource cards ===== */
.resource-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}
.resource-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: all .25s ease;
}
.resource-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.resource-card:nth-child(1),
.resource-card:nth-child(2) { grid-row: span 2; }
.resource-thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #DAE9EA;
}
.resource-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.resource-card:hover .resource-thumb img { transform: scale(1.025); }
.resource-thumb-placeholder { width: 100%; height: 100%; background: #DFEAEB; }
.resource-tag {
  position: absolute;
  left: 14px;
  top: 14px;
  background: rgba(7, 35, 39, .76);
  color: #DFF4F0;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 999px;
  backdrop-filter: blur(6px);
}
.resource-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.resource-body h3 { margin: 0 0 10px; color: #12282E; font-size: 21px; font-weight: 800; }
.resource-body p { margin: 0 0 18px; color: var(--text-muted); font-size: 15px; line-height: 1.85; }
.resource-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  color: var(--primary);
  margin-top: auto;
  font-size: 14px;
}
.resource-link svg { transition: transform .2s ease; }
.resource-link:hover svg { transform: translateX(4px); }
.resource-link:hover { color: var(--primary-strong); }

/* ===== Checklist / preparation ===== */
.prep-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.prep-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  box-shadow: var(--shadow-card);
}
.prep-item .prep-no {
  display: block;
  width: 38px;
  height: 38px;
  border-radius: 14px;
  background: var(--sand-soft);
  color: #866720;
  display: grid;
  place-items: center;
  font-weight: 800;
  margin-bottom: 16px;
}
.prep-item h3 { margin: 0 0 10px; color: #132B30; font-size: 17px; font-weight: 800; }
.prep-item p { margin: 0; color: var(--text-muted); font-size: 14px; line-height: 1.8; }

/* ===== FAQ ===== */
.faq-wrap {
  max-width: 880px;
  margin: 0 auto;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 14px;
  box-shadow: 0 4px 16px rgba(18,57,60,.04);
  overflow: hidden;
}
.faq-item[open] { box-shadow: 0 8px 28px rgba(18,57,60,.08); }
.faq-open {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px 24px;
  background: transparent;
  border: none;
  text-align: left;
  color: #172A31;
  font-weight: 700;
  font-size: 16px;
  transition: all .2s;
}
.faq-open:hover { color: var(--primary); }
.faq-open .faq-ic {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 700;
  transition: all .2s ease;
}
.faq-item[open] .faq-open .faq-ic { background: var(--primary); color: #fff; transform: rotate(135deg); }
.faq-item .faq-ic::before { content: '+'; font-size: 16px; }
.faq-answer { padding: 0 24px 24px; margin-top: -8px; color: #53646C; font-size: 15px; line-height: 1.9; border-top: 1px dashed var(--border); padding-top: 16px; }
.faq-answer a { color: var(--primary); font-weight: 600; }
.faq-answer a:hover { text-decoration: underline; }

/* ===== CTA ===== */
.cta-band {
  background: #E2F0EE;
  border-radius: 26px;
  padding: 50px 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-band h2 { margin: 0 0 10px; font-weight: 800; color: #103137; font-size: clamp(22px, 3.2vw, 32px); }
.cta-band p { margin: 0; color: #4B6A70; max-width: 620px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.btn-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  height: 48px;
  padding: 0 22px;
  border-radius: 12px;
  font-weight: 700;
  border: 1px solid var(--primary);
  transition: all .2s ease;
}
.btn-dark:hover { background: var(--primary-strong); transform: translateY(-2px); box-shadow: 0 14px 26px rgba(20,107,103,.24); }
.btn-light {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  height: 48px;
  padding: 0 22px;
  border-radius: 12px;
  font-weight: 600;
  color: var(--primary-strong);
  border: 1px solid #C8E2E0;
  transition: all .2s ease;
}
.btn-light:hover { background: var(--primary-soft); }

/* ===== Footer ===== */
.site-footer {
  background: #092429;
  color: #B9D6DA;
  padding-top: 70px;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 54px;
}
.footer-brand p {
  margin: 20px 0 0;
  max-width: 360px;
  color: #A9CACF;
  font-size: 14px;
  line-height: 1.9;
}
.footer-cols { display: flex; flex-direction: column; }
.f-title {
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  letter-spacing: .04em;
  margin-bottom: 16px;
}
.footer-cols a {
  color: #A9CACF;
  font-size: 14px;
  padding: 5px 0;
  opacity: .9;
}
.footer-cols a:hover { color: #CDF3EC; opacity: 1; transform: translateX(3px); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.09);
  padding: 22px 0 26px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  color: #8CB4BA;
  font-size: 13px;
}

/* ===== responsive ===== */
@media (max-width: 1024px) {
  .guide-panel { grid-template-columns: 300px 1fr; gap: 32px; }
  .proc-grid { grid-template-columns: repeat(2, 1fr); }
  .resource-grid { grid-template-columns: 1fr 1fr; }
  .prep-list { grid-template-columns: 1fr 1fr; }
  .resource-card:nth-child(1), .resource-card:nth-child(2) { grid-row: span 1; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 800px) {
  .section { padding: 72px 0; }
  .section-deep .proc-grid { gap: 14px; }
  .device-card { grid-template-columns: auto 1fr; }
  .device-link-more { grid-column: 1 / -1; grid-row: auto; width: fit-content; }
  .nav-toggle { display: flex; }
  .header-act { display: none; }
  .nav-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    left: 0;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: 0 26px 56px rgba(10, 50, 54, .16);
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    display: none;
    z-index: 90;
  }
  .nav-check:checked + .nav-toggle + .nav-menu,
  .nav-check:checked ~ .nav-menu { display: flex; }
  .nav-link { padding: 14px 14px; border-bottom: 1px solid #EBF0F0; width: 100%; justify-content: space-between; }
  .nav-link:last-child { border-bottom: 0; }
  .nav-link.is-active:after { display: none; }
  .nav-link.is-active { background: var(--primary-soft); color: var(--primary); border-radius: 12px; }
  .hero-meta { margin-top: 46px; }
  .hero { padding: 92px 0 60px; }
}
@media (max-width: 640px) {
  .guide-panel { grid-template-columns: 1fr; }
  .guide-sticky .sticky-wrap { position: static; }
  .resource-grid, .prep-list { grid-template-columns: 1fr; }
  .cta-band { padding: 34px 24px; }
  .cta-actions { width: 100%; }
  .cta-actions a { flex: 1; min-width: 150px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; }
  .sec-header { margin-bottom: 36px; }
}
@media (max-width: 480px) {
  .brand-text strong { font-size: 16px; }
  .brand-text em { font-size: 11px; }
  .brand-lockup { gap: 8px; }
  .hero-title { font-size: 34px; }
  .hero-sub { font-size: 16px; }
  .hero-meta { flex-direction: column; }
  .hero-metric { width: 100%; }
  .device-card { padding: 22px 18px; }
  .proc-grid { grid-template-columns: 1fr; }
  .sec-title { font-size: 27px; }
  .faq-open { font-size: 15px; padding: 18px; }
}

/* roulang page: category4 */
:root {
    --primary: #0e7a72;
    --primary-600: #0b605c;
    --primary-soft: #dff1ef;
    --deep: #0b2730;
    --ink: #17343c;
    --muted: #58707a;
    --line: #dbe7e8;
    --bg: #f5f9fa;
    --surface: #ffffff;
    --accent: #c59a57;
    --accent-soft: #f8efe1;
    --round: 18px;
    --shadow-sm: 0 1px 2px rgba(13, 37, 41, 0.05), 0 8px 24px rgba(13, 37, 41, 0.04);
    --shadow-md: 0 2px 6px rgba(13, 37, 41, 0.06), 0 18px 40px rgba(13, 37, 41, 0.08);
    --radius-btn: 10px;
  }

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

  html {
    scroll-behavior: smooth;
    scroll-padding-top: 104px;
  }

  body {
    margin: 0;
    padding: 0;
  }

  body.site-body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
    line-height: 1.75;
    background: var(--bg);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  img {
    max-width: 100%;
    display: block;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

  button,
  input {
    font: inherit;
  }

  .container {
    width: min(1260px, calc(100% - 40px));
    margin-inline: auto;
  }

  .section {
    padding: clamp(56px, 7vw, 96px) 0;
  }

  .section-title {
    font-size: clamp(28px, 3.4vw, 40px);
    line-height: 1.25;
    font-weight: 750;
    letter-spacing: -0.02em;
    margin: 0;
    color: var(--ink);
  }

  .section-lead {
    font-size: 16px;
    color: var(--muted);
    max-width: 760px;
    margin: 14px 0 0;
  }

  .kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 650;
    letter-spacing: 0.14em;
    color: var(--primary);
    margin: 0 0 10px;
  }

  .kicker::before {
    content: "";
    width: 22px;
    height: 2px;
    border-radius: 99px;
    background: var(--accent);
  }

  .text-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
    transition: gap 0.25s ease, color 0.25s ease;
  }

  .text-link:hover {
    color: var(--primary-600);
    gap: 10px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 24px;
    border-radius: var(--radius-btn);
    font-weight: 600;
    font-size: 15px;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  }

  .btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 10px 24px rgba(14, 122, 114, 0.24);
  }

  .btn-primary:hover {
    background: var(--primary-600);
    transform: translateY(-2px);
    box-shadow: 0 14px 34px rgba(14, 122, 114, 0.3);
  }

  .btn-secondary {
    background: transparent;
    border: 1px solid var(--line);
    color: var(--ink);
  }

  .btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
  }

  .btn-lg {
    height: 54px;
    padding: 0 32px;
    font-size: 16px;
  }

  .btn-mini {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    padding: 0 18px;
    border-radius: 10px;
    background: var(--primary);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.25s ease, transform 0.25s ease;
  }

  .btn-mini:hover {
    background: var(--primary-600);
    transform: translateY(-1px);
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 70;
    background: rgba(247, 250, 251, 0.88);
    border-bottom: 1px solid rgba(219, 231, 232, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    height: 76px;
  }

  .brand-lockup {
    display: inline-flex;
    align-items: center;
    gap: 11px;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
    border-radius: 13px;
    background: var(--primary);
    color: #fff;
    font-weight: 800;
    letter-spacing: 0.04em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    box-shadow: 0 6px 16px rgba(14, 122, 114, 0.2);
  }

  .brand-text {
    display: inline-flex;
    flex-direction: column;
    line-height: 1.15;
  }

  .brand-text strong {
    font-size: 18px;
    font-weight: 800;
    color: var(--ink);
    letter-spacing: 0.01em;
  }

  .brand-text em {
    font-style: normal;
    font-size: 12px;
    color: var(--muted);
    letter-spacing: 0.08em;
  }

  .nav-check,
  .nav-toggle {
    display: none;
  }

  .nav-menu {
    display: flex;
    align-items: center;
    gap: 28px;
  }

  .nav-link {
    position: relative;
    display: inline-block;
    padding: 10px 2px;
    color: #3b5359;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.25s ease;
  }

  .nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 2px;
    height: 2px;
    border-radius: 99px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
  }

  .nav-link:hover {
    color: var(--primary);
  }

  .nav-link.is-active {
    color: var(--primary);
    font-weight: 650;
  }

  .nav-link.is-active::after {
    transform: scaleX(1);
  }

  .page-hero {
    position: relative;
    color: #fff;
    padding: 84px 0 78px;
    overflow: hidden;
    background-color: var(--deep);
  }

  .page-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: url("/assets/images/backpic/back-2.webp") center 15% / cover no-repeat;
    opacity: 0.13;
    pointer-events: none;
    z-index: 0;
  }

  .page-hero .container {
    position: relative;
    z-index: 1;
  }

  .hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 99px;
    color: #cbe6e3;
    background: rgba(255, 255, 255, 0.05);
    font-size: 13px;
    margin-bottom: 22px;
    letter-spacing: 0.08em;
  }

  .hero-title {
    font-size: clamp(34px, 4.6vw, 54px);
    line-height: 1.18;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0;
    color: #fff;
  }

  .hero-title .emphasize {
    display: block;
    color: #96d6cf;
    font-weight: 650;
    margin-top: 10px;
    letter-spacing: 0.02em;
  }

  .hero-summary {
    max-width: 780px;
    font-size: 16px;
    line-height: 1.9;
    color: #d2e3e5;
    margin: 24px 0 0;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    margin-top: 34px;
  }

  .btn-hero-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 50px;
    padding: 0 28px;
    border-radius: 12px;
    background: #ffffff;
    color: var(--deep);
    font-weight: 700;
    font-size: 15px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.14);
    transition: transform 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
  }

  .btn-hero-primary:hover {
    transform: translateY(-2px);
    background: #eafffc;
  }

  .btn-hero-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 50px;
    padding: 0 26px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.42);
    color: #fff;
    font-weight: 600;
    font-size: 15px;
    transition: background 0.25s ease, border 0.25s ease, transform 0.25s ease;
  }

  .btn-hero-ghost:hover {
    transform: translateY(-2px);
    border-color: #fff;
    background: rgba(255, 255, 255, 0.1);
  }

  .hero-note-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 16px 28px;
    margin-top: 40px;
    padding-top: 22px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    color: #bcd3d4;
    font-size: 13px;
    letter-spacing: 0.02em;
  }

  .topic-card {
    display: flex;
    flex-direction: column;
    min-height: 216px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  }

  .topic-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(14, 122, 114, 0.35);
  }

  .topic-card .topic-num {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 12px;
  }

  .topic-card .topic-num::after {
    content: "";
    width: 18px;
    height: 1px;
    background: var(--line);
  }

  .topic-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--ink);
    margin: 0 0 10px;
    line-height: 1.4;
  }

  .topic-card p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.75;
    margin: 0;
  }

  .topic-card .topic-arrow {
    margin-top: auto;
    padding-top: 18px;
    color: var(--primary);
    font-weight: 650;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    transition: gap 0.25s ease;
  }

  .topic-card:hover .topic-arrow {
    gap: 10px;
  }

  .step-item {
    position: relative;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 28px 24px 24px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .step-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
  }

  .step-item .step-index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--primary-soft);
    color: var(--primary-600);
    font-weight: 800;
    font-size: 15px;
    margin-bottom: 18px;
    letter-spacing: 0.02em;
  }

  .step-item h3 {
    font-size: 18px;
    margin: 0 0 8px;
    color: var(--ink);
    font-weight: 700;
  }

  .step-item p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--muted);
    margin: 0;
  }

  .answer-row {
    display: grid;
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 24px;
    align-items: start;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 28px;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
  }

  .answer-row:hover {
    border-color: rgba(14, 122, 114, 0.28);
    box-shadow: var(--shadow-md);
  }

  .answer-row .answer-cat {
    display: inline-flex;
    font-size: 12px;
    font-weight: 650;
    letter-spacing: 0.06em;
    color: var(--accent);
    background: var(--accent-soft);
    padding: 5px 12px;
    border-radius: 99px;
    margin-bottom: 10px;
  }

  .answer-row h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--ink);
    margin: 0;
    line-height: 1.45;
  }

  .answer-row p {
    font-size: 15px;
    color: var(--muted);
    line-height: 1.8;
    margin: 0 0 14px;
  }

  @media (max-width: 900px) {
    .answer-row {
      grid-template-columns: 1fr;
      gap: 10px;
    }
  }

  .device-panel {
    position: relative;
    overflow: hidden;
    border-radius: 28px;
    background: var(--deep);
    color: #e4f0ef;
    box-shadow: 0 22px 70px rgba(8, 32, 38, 0.22);
  }

  .device-panel .device-copy {
    padding: clamp(28px, 4vw, 58px);
  }

  .device-panel h2 {
    font-size: clamp(24px, 2.4vw, 34px);
    line-height: 1.3;
    color: #fff;
    margin: 0 0 18px;
  }

  .device-panel .lead {
    color: #b7d2d2;
    margin: 0 0 26px;
    max-width: 580px;
  }

  .save-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 14px;
  }

  .save-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 14px 16px;
    border-radius: 14px;
    color: #d8e9e8;
    font-size: 14px;
  }

  .save-list li svg {
    flex: none;
    margin-top: 3px;
    color: #8ed0c6;
  }

  .media-frame {
    height: 100%;
    min-height: 420px;
    position: relative;
  }

  .media-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .media-frame::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--deep) 0%, transparent 26%);
    pointer-events: none;
  }

  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .faq-item {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 4px 24px;
    transition: box-shadow 0.25s ease, border-color 0.25s ease;
  }

  .faq-item:hover {
    border-color: rgba(14, 122, 114, 0.28);
  }

  .faq-item[open] {
    box-shadow: var(--shadow-sm);
  }

  .faq-item summary {
    display: flex;
    align-items: center;
    gap: 18px;
    cursor: pointer;
    padding: 20px 0;
    font-weight: 650;
    font-size: 16px;
    color: var(--ink);
    list-style: none;
    line-height: 1.5;
  }

  .faq-item summary::-webkit-details-marker {
    display: none;
  }

  .faq-item summary::after {
    content: "+";
    margin-left: auto;
    width: 26px;
    height: 26px;
    flex: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 400;
    font-size: 20px;
    line-height: 1;
    color: var(--primary);
    background: var(--primary-soft);
    border-radius: 50%;
    transition: transform 0.3s ease, background 0.3s ease;
  }

  .faq-item[open] summary::after {
    transform: rotate(45deg);
    background: var(--primary);
    color: #fff;
  }

  .faq-item .faq-answer {
    padding: 0 0 24px;
    color: var(--muted);
    font-size: 15px;
  }

  .cta-band {
    background: #eaf4f3;
    border-top: 1px solid #d5e7e5;
    border-bottom: 1px solid #d5e7e5;
  }

  .cta-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 24px;
    padding: clamp(30px, 5vw, 56px);
    box-shadow: var(--shadow-sm);
    text-align: center;
  }

  .cta-card h2 {
    font-size: clamp(24px, 3vw, 36px);
    margin: 0 0 14px;
    color: var(--ink);
  }

  .cta-card p {
    max-width: 680px;
    margin: 0 auto 28px;
    color: var(--muted);
  }

  .cta-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
  }

  .site-footer {
    background: #082329;
    color: #b4c9c7;
    padding: 68px 0 0;
  }

  .footer-main {
    padding-bottom: 42px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 0.8fr 0.8fr 0.8fr;
    gap: 44px;
  }

  .footer-brand p {
    margin: 22px 0 0;
    max-width: 360px;
    font-size: 14px;
    line-height: 1.9;
    color: #9bb7b5;
  }

  .footer-cols {
    display: flex;
    flex-direction: column;
    gap: 11px;
  }

  .f-title {
    color: #e6f2f0;
    font-weight: 650;
    font-size: 15px;
    margin-bottom: 4px;
  }

  .footer-cols a {
    font-size: 14px;
    color: #9bb7b5;
    transition: color 0.25s ease, padding-left 0.25s ease;
  }

  .footer-cols a:hover {
    color: #ffffff;
    padding-left: 4px;
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 22px 0 26px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 8px 20px;
    font-size: 13px;
    color: #7fa5a1;
  }

  .footer-bottom .brand-lockup .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 13px;
    border-radius: 10px;
  }

  @media (max-width: 1024px) {
    .nav-menu {
      gap: 18px;
    }

    .header-inner {
      height: 72px;
    }

    .nav-link {
      font-size: 14px;
    }

    .brand-text strong {
      font-size: 17px;
    }

    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
  }

  @media (max-width: 860px) {
    .header-inner {
      height: 66px;
    }

    .nav-toggle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 42px;
      height: 42px;
      border-radius: 12px;
      color: var(--ink);
      border: 1px solid var(--line);
      cursor: pointer;
    }

    .nav-menu {
      display: none;
      position: absolute;
      top: calc(100% + 6px);
      left: 0;
      right: 0;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 18px;
      padding: 14px;
      flex-direction: column;
      gap: 4px;
      box-shadow: 0 28px 80px rgba(5, 30, 34, 0.14);
    }

    .nav-check:checked ~ .nav-menu {
      display: flex;
    }

    .nav-check:checked ~ .nav-toggle {
      border-color: var(--primary);
      color: var(--primary);
    }

    .nav-menu .nav-link {
      display: block;
      width: 100%;
      padding: 12px 14px;
      border-radius: 12px;
      color: var(--ink);
      font-size: 16px;
    }

    .nav-link::after {
      display: none;
    }

    .nav-link.is-active {
      color: var(--primary);
      background: var(--primary-soft);
    }

    .header-act {
      display: none;
    }
  }

  @media (max-width: 640px) {
    .container {
      width: min(1260px, calc(100% - 28px));
    }

    .section {
      padding: 52px 0;
    }

    .hero-summary {
      font-size: 15px;
    }

    .hero-note-bar {
      gap: 10px 16px;
    }

    .device-panel .device-copy {
      padding: 28px 22px;
    }

    .media-frame {
      min-height: 260px;
    }

    .media-frame img {
      position: absolute;
      inset: 0;
    }

    .cta-card {
      padding: 30px 20px;
    }

    .cta-actions .btn {
      width: 100%;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 28px;
    }

    .footer-bottom {
      flex-direction: column;
      font-size: 12px;
    }
  }

  ::selection {
    background: rgba(14, 122, 114, 0.15);
  }