/* roulang page: index */
:root{
      --primary:#0F766E;
      --primary-dark:#115E59;
      --primary-soft:#ECFDF5;
      --secondary:#334155;
      --accent:#F59E0B;
      --accent-dark:#B45309;
      --base:#F7F4EE;
      --surface:#FFFFFF;
      --surface-warm:#FFFCF7;
      --section:#F1F5F9;
      --border:#DDE5DF;
      --border-strong:rgba(15,118,110,.28);
      --heading:#102A2A;
      --text:#334155;
      --muted:#64748B;
      --footer:#102A2A;
      --shadow-sm:0 8px 22px rgba(15,23,42,.06);
      --shadow-md:0 18px 45px rgba(15,23,42,.08);
      --shadow-lg:0 28px 70px rgba(15,23,42,.12);
      --radius-sm:14px;
      --radius-md:18px;
      --radius-lg:24px;
      --radius-xl:32px;
      --container:1200px;
      --transition:220ms ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      background:var(--base);
      color:var(--text);
      font-size:16px;
      line-height:1.75;
      text-rendering:optimizeLegibility;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:color var(--transition),background var(--transition),border-color var(--transition),transform var(--transition),box-shadow var(--transition)}
    img{max-width:100%;height:auto;display:block}
    button,input,select,textarea{font:inherit}
    ::selection{background:rgba(15,118,110,.18);color:var(--heading)}
    .site-container{width:min(100% - 32px,var(--container));margin-inline:auto}
    .section{padding:88px 0;position:relative}
    .section-tight{padding:64px 0}
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 13px;
      border-radius:999px;
      background:var(--primary-soft);
      color:var(--primary-dark);
      font-size:14px;
      font-weight:700;
      border:1px solid rgba(15,118,110,.12);
      margin-bottom:14px;
    }
    .section-kicker::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 5px rgba(245,158,11,.13);
    }
    .section-title{
      color:var(--heading);
      font-size:clamp(28px,3.2vw,38px);
      line-height:1.25;
      font-weight:850;
      letter-spacing:-.02em;
      margin:0 0 14px;
    }
    .section-lead{
      color:var(--muted);
      max-width:760px;
      margin:0;
      font-size:17px;
    }
    .text-balance{text-wrap:balance}
    .btn-brand{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:48px;
      padding:12px 24px;
      border-radius:999px;
      border:1px solid var(--primary);
      background:var(--primary);
      color:#fff;
      font-weight:800;
      box-shadow:0 14px 28px rgba(15,118,110,.18);
      cursor:pointer;
      white-space:nowrap;
    }
    .btn-brand:hover{
      color:#fff;
      background:var(--primary-dark);
      border-color:var(--primary-dark);
      transform:translateY(-2px);
      box-shadow:0 18px 36px rgba(15,94,89,.25);
    }
    .btn-brand:focus,.btn-outline-brand:focus,.navbar-toggler:focus,.form-control:focus,.form-select:focus{
      outline:none;
      box-shadow:0 0 0 4px rgba(15,118,110,.18);
    }
    .btn-outline-brand{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:48px;
      padding:12px 22px;
      border-radius:999px;
      border:1px solid rgba(15,118,110,.38);
      background:rgba(255,255,255,.75);
      color:var(--primary-dark);
      font-weight:800;
      cursor:pointer;
      white-space:nowrap;
    }
    .btn-outline-brand:hover{
      background:var(--primary-soft);
      color:var(--primary-dark);
      border-color:var(--primary);
      transform:translateY(-2px);
    }
    .btn-amber{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      min-height:48px;
      padding:12px 24px;
      border-radius:999px;
      border:1px solid var(--accent);
      background:var(--accent);
      color:#1f2937;
      font-weight:850;
      box-shadow:0 14px 30px rgba(245,158,11,.22);
    }
    .btn-amber:hover{background:#D97706;border-color:#D97706;color:#111827;transform:translateY(-2px)}
    .tag{
      display:inline-flex;
      align-items:center;
      gap:6px;
      border-radius:999px;
      padding:5px 10px;
      font-size:13px;
      font-weight:750;
      line-height:1.2;
      background:var(--primary-soft);
      color:var(--primary-dark);
      border:1px solid rgba(15,118,110,.13);
    }
    .tag-amber{background:rgba(245,158,11,.12);color:var(--accent-dark);border-color:rgba(245,158,11,.22)}
    .site-header{
      position:sticky;
      top:0;
      z-index:1030;
      background:rgba(247,244,238,.88);
      backdrop-filter:saturate(170%) blur(14px);
      border-bottom:1px solid rgba(15,118,110,.11);
      box-shadow:0 10px 30px rgba(15,23,42,.04);
    }
    .navbar{padding:14px 0}
    .brand-logo{
      display:inline-flex;
      align-items:center;
      gap:12px;
      color:var(--heading);
      font-weight:900;
      letter-spacing:-.02em;
      min-height:48px;
    }
    .logo-mark{
      width:44px;
      height:44px;
      border-radius:16px;
      background:linear-gradient(135deg,var(--primary),#14B8A6);
      display:grid;
      place-items:center;
      box-shadow:0 12px 26px rgba(15,118,110,.22);
      position:relative;
      overflow:hidden;
      flex:0 0 auto;
    }
    .logo-mark::before{
      content:"";
      position:absolute;
      inset:8px 9px 10px 9px;
      background:
        linear-gradient(135deg,transparent 35%,rgba(255,255,255,.92) 36% 44%,transparent 45%),
        linear-gradient(45deg,transparent 46%,rgba(255,255,255,.86) 47% 55%,transparent 56%);
      border-left:3px solid rgba(255,255,255,.92);
      border-bottom:3px solid rgba(255,255,255,.72);
      transform:skewX(-8deg);
    }
    .brand-text{display:flex;flex-direction:column;line-height:1.1}
    .brand-text strong{font-size:19px;color:var(--heading)}
    .brand-text span{font-size:12px;color:var(--muted);font-weight:700;margin-top:3px}
    .navbar-nav{gap:6px;align-items:center}
    .nav-link{
      position:relative;
      color:var(--secondary);
      font-size:15px;
      font-weight:750;
      padding:10px 14px!important;
      border-radius:999px;
      min-height:44px;
      display:flex;
      align-items:center;
    }
    .nav-link:hover{color:var(--primary-dark);background:rgba(15,118,110,.08)}
    .nav-link.active{
      color:var(--primary-dark);
      background:var(--primary-soft);
    }
    .nav-link.active::after{
      content:"";
      position:absolute;
      left:18px;
      right:18px;
      bottom:6px;
      height:2px;
      border-radius:2px;
      background:var(--primary);
    }
    .navbar-toggler{
      border:1px solid rgba(15,118,110,.18);
      border-radius:14px;
      padding:9px 11px;
      background:rgba(255,255,255,.72);
    }
    .toggler-lines{display:flex;flex-direction:column;gap:5px}
    .toggler-lines span{width:22px;height:2px;background:var(--primary-dark);border-radius:2px}
    .hero{
      position:relative;
      padding:96px 0 78px;
      overflow:hidden;
      background:
        radial-gradient(circle at 12% 18%,rgba(15,118,110,.12),transparent 28%),
        radial-gradient(circle at 82% 10%,rgba(245,158,11,.12),transparent 24%),
        linear-gradient(180deg,#FFFCF7 0%,var(--base) 70%);
    }
    .hero::before{
      content:"";
      position:absolute;
      inset:0;
      opacity:.42;
      background-image:
        linear-gradient(rgba(15,118,110,.08) 1px,transparent 1px),
        linear-gradient(90deg,rgba(15,118,110,.08) 1px,transparent 1px);
      background-size:36px 36px;
      mask-image:linear-gradient(180deg,#000 0%,transparent 86%);
      pointer-events:none;
    }
    .hero-content{position:relative;z-index:1}
    .hero h1{
      color:var(--heading);
      font-size:clamp(34px,5.2vw,56px);
      line-height:1.16;
      font-weight:900;
      letter-spacing:-.035em;
      margin:18px 0 20px;
    }
    .hero h1 .accent-word{color:var(--primary-dark);position:relative}
    .hero h1 .accent-word::after{
      content:"";
      position:absolute;
      left:0;right:0;bottom:4px;
      height:10px;
      background:rgba(245,158,11,.22);
      z-index:-1;
      border-radius:999px;
    }
    .hero-subtitle{
      color:#475569;
      font-size:18px;
      max-width:660px;
      margin-bottom:28px;
    }
    .hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:26px}
    .trust-row{display:flex;gap:12px;flex-wrap:wrap}
    .trust-item{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:9px 12px;
      border:1px solid rgba(15,118,110,.12);
      border-radius:999px;
      background:rgba(255,255,255,.7);
      color:#475569;
      font-size:14px;
      font-weight:700;
      box-shadow:0 8px 18px rgba(15,23,42,.04);
    }
    .trust-dot{width:8px;height:8px;border-radius:50%;background:var(--primary)}
    .hero-panel{
      position:relative;
      border-radius:var(--radius-xl);
      background:linear-gradient(145deg,rgba(255,255,255,.86),rgba(236,253,245,.86));
      border:1px solid rgba(15,118,110,.18);
      box-shadow:var(--shadow-lg);
      padding:18px;
      overflow:hidden;
    }
    .hero-panel::before{
      content:"";
      position:absolute;
      inset:0;
      background-image:url('/assets/images/backpic/back-1.webp');
      background-size:cover;
      background-position:center;
      opacity:.16;
      filter:saturate(.95);
    }
    .hero-panel-inner{position:relative;z-index:1}
    .panel-top{
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:12px;
      padding:14px 14px 16px;
      border-radius:22px;
      background:rgba(255,252,247,.78);
      border:1px solid rgba(255,255,255,.7);
      backdrop-filter:blur(10px);
      margin-bottom:14px;
    }
    .panel-title{font-weight:900;color:var(--heading);margin:0}
    .panel-status{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:6px 10px;
      border-radius:999px;
      background:rgba(15,118,110,.1);
      color:var(--primary-dark);
      font-size:13px;
      font-weight:850;
    }
    .pulse{
      width:8px;height:8px;border-radius:50%;
      background:#10B981;
      box-shadow:0 0 0 5px rgba(16,185,129,.15);
    }
    .dashboard-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .dash-card{
      background:rgba(255,255,255,.86);
      border:1px solid rgba(15,118,110,.13);
      border-radius:20px;
      padding:16px;
      box-shadow:0 12px 28px rgba(15,23,42,.05);
      min-height:122px;
    }
    .dash-card.wide{grid-column:1/-1}
    .dash-label{font-size:13px;color:var(--muted);font-weight:800;margin-bottom:8px}
    .dash-number{font-size:32px;line-height:1;color:var(--primary-dark);font-weight:950;letter-spacing:-.04em;margin-bottom:8px}
    .dash-desc{font-size:14px;color:#475569;margin:0}
    .progress-line{
      height:9px;
      background:#E2E8F0;
      border-radius:999px;
      overflow:hidden;
      margin-top:12px;
    }
    .progress-line span{
      display:block;
      height:100%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--primary),#2DD4BF,var(--accent));
    }
    .metric-card,.matrix-card,.topic-card,.insight-card{
      background:var(--surface);
      border:1px solid rgba(15,118,110,.12);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow-sm);
      transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition),background var(--transition);
    }
    .metric-card:hover,.matrix-card:hover,.topic-card:hover,.insight-card:hover{
      transform:translateY(-4px);
      border-color:rgba(15,118,110,.34);
      box-shadow:var(--shadow-md);
    }
    .metrics-board{
      margin-top:-34px;
      position:relative;
      z-index:4;
    }
    .metric-card{
      padding:24px;
      height:100%;
      background:linear-gradient(180deg,#fff 0%,#FFFCF7 100%);
    }
    .metric-icon{
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      background:var(--primary-soft);
      color:var(--primary-dark);
      font-weight:950;
      margin-bottom:16px;
      border:1px solid rgba(15,118,110,.12);
    }
    .metric-number{
      color:var(--heading);
      font-size:clamp(28px,3.2vw,40px);
      font-weight:950;
      letter-spacing:-.04em;
      line-height:1;
      margin-bottom:10px;
    }
    .metric-number span{color:var(--accent);font-size:.72em}
    .metric-card p{color:var(--muted);font-size:15px;margin:0}
    .matrix-area{background:linear-gradient(180deg,var(--base) 0%,#FFFCF7 100%)}
    .matrix-grid{
      display:grid;
      grid-template-columns:1.18fr .82fr .82fr;
      gap:18px;
      margin-top:34px;
    }
    .matrix-card{padding:26px;min-height:220px}
    .matrix-card.feature{
      grid-row:span 2;
      min-height:458px;
      background:
        linear-gradient(145deg,rgba(236,253,245,.96),rgba(255,252,247,.98)),
        url('/assets/images/coverpic/cover-2.webp');
      background-size:cover;
      background-blend-mode:screen;
      overflow:hidden;
      position:relative;
    }
    .matrix-card.feature::after{
      content:"";
      position:absolute;
      width:180px;height:180px;
      right:-60px;bottom:-70px;
      border-radius:50%;
      background:rgba(15,118,110,.12);
    }
    .matrix-index{
      width:38px;height:38px;border-radius:14px;
      background:var(--heading);
      color:#fff;
      display:grid;place-items:center;
      font-weight:900;
      margin-bottom:18px;
    }
    .matrix-card h3{font-size:22px;color:var(--heading);font-weight:850;margin:0 0 12px}
    .matrix-card p{color:#526173;margin:0 0 18px}
    .matrix-list{list-style:none;padding:0;margin:22px 0 0;display:grid;gap:12px}
    .matrix-list li{
      display:flex;
      gap:10px;
      align-items:flex-start;
      padding:12px;
      border-radius:16px;
      background:rgba(255,255,255,.68);
      border:1px solid rgba(15,118,110,.1);
      color:#475569;
      font-weight:650;
    }
    .check{
      width:22px;height:22px;flex:0 0 auto;border-radius:50%;
      background:var(--primary);
      color:#fff;
      display:grid;place-items:center;
      font-size:13px;
      font-weight:900;
      margin-top:2px;
    }
    .compare-section{background:var(--section)}
    .compare-wrap{
      display:grid;
      grid-template-columns:.86fr 1.14fr;
      gap:34px;
      align-items:center;
      margin-top:34px;
    }
    .compare-note{
      border-radius:var(--radius-xl);
      padding:28px;
      background:#102A2A;
      color:#E2E8F0;
      position:relative;
      overflow:hidden;
      box-shadow:var(--shadow-md);
    }
    .compare-note::before{
      content:"";
      position:absolute;
      inset:auto -80px -110px auto;
      width:240px;height:240px;border-radius:50%;
      background:rgba(15,118,110,.45);
    }
    .compare-note h3{color:#fff;font-weight:900;margin-bottom:14px}
    .compare-note p{color:#CBD5E1;margin-bottom:18px}
    .mini-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px;position:relative}
    .mini-stat{
      padding:14px;border-radius:18px;
      background:rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.12);
    }
    .mini-stat strong{display:block;color:#FCD34D;font-size:24px;line-height:1.1}
    .mini-stat span{font-size:13px;color:#CBD5E1}
    .compare-card{
      background:var(--surface);
      border:1px solid rgba(15,118,110,.12);
      border-radius:var(--radius-xl);
      padding:12px;
      box-shadow:var(--shadow-md);
    }
    .compare-row{
      display:grid;
      grid-template-columns:1fr 1fr;
      gap:10px;
      padding:10px;
    }
    .compare-cell{
      padding:18px;
      border-radius:20px;
      border:1px solid rgba(15,118,110,.1);
      background:#F8FAFC;
    }
    .compare-cell.after{
      background:var(--primary-soft);
      border-color:rgba(15,118,110,.24);
    }
    .compare-head{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:8px;
      margin-bottom:8px;
      font-weight:900;
      color:var(--heading);
    }
    .compare-cell.before .compare-head{color:#64748B}
    .compare-cell p{margin:0;color:#64748B;font-size:15px}
    .compare-cell.after p{color:#315a55}
    .topic-section{background:#FFFCF7}
    .topic-grid{margin-top:34px}
    .topic-card{
      height:100%;
      overflow:hidden;
      background:#fff;
      display:flex;
      flex-direction:column;
    }
    .topic-image{
      position:relative;
      aspect-ratio:16/9;
      overflow:hidden;
      background:#E2E8F0;
    }
    .topic-image img{width:100%;height:100%;object-fit:cover;transition:transform var(--transition)}
    .topic-card:hover .topic-image img{transform:scale(1.04)}
    .topic-image::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg,transparent 45%,rgba(16,42,42,.62));
    }
    .topic-image .tag{
      position:absolute;
      left:16px;
      bottom:16px;
      z-index:1;
      background:rgba(255,252,247,.9);
    }
    .topic-body{padding:24px;display:flex;flex-direction:column;flex:1}
    .topic-body h3{font-size:22px;color:var(--heading);font-weight:850;margin:0 0 10px}
    .topic-body p{color:var(--muted);margin:0 0 18px;flex:1}
    .topic-link{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--primary-dark);
      font-weight:850;
      margin-top:auto;
    }
    .topic-link:hover{color:var(--accent-dark);gap:12px}
    .insight-strip{
      display:grid;
      grid-template-columns:1fr 1fr 1fr;
      gap:18px;
      margin-top:34px;
    }
    .insight-card{padding:24px;background:linear-gradient(180deg,#fff,#FFFCF7)}
    .insight-card h3{font-size:20px;color:var(--heading);font-weight:850;margin:0 0 10px}
    .insight-card p{color:var(--muted);font-size:15px;margin:0}
    .faq-section{background:var(--base)}
    .accordion{margin-top:34px}
    .accordion-item{
      background:transparent;
      border:0;
      margin-bottom:14px;
    }
    .accordion-button{
      border-radius:18px!important;
      background:#fff;
      border:1px solid rgba(15,118,110,.12);
      box-shadow:var(--shadow-sm);
      color:var(--heading);
      font-weight:850;
      padding:18px 22px;
      line-height:1.55;
    }
    .accordion-button:not(.collapsed){
      background:var(--primary-soft);
      color:var(--primary-dark);
      border-color:rgba(15,118,110,.28);
      box-shadow:0 14px 32px rgba(15,118,110,.08);
    }
    .accordion-button::after{filter:hue-rotate(120deg) saturate(1.4)}
    .accordion-button:focus{box-shadow:0 0 0 4px rgba(15,118,110,.16)}
    .accordion-body{
      margin-top:8px;
      border-radius:18px;
      background:rgba(255,255,255,.72);
      border:1px solid rgba(15,118,110,.09);
      color:#475569;
      padding:20px 22px;
    }
    .cta-section{
      background:
        radial-gradient(circle at 8% 16%,rgba(245,158,11,.18),transparent 24%),
        linear-gradient(135deg,#102A2A 0%,#115E59 100%);
      color:#E2E8F0;
      overflow:hidden;
    }
    .cta-section .section-title{color:#fff}
    .cta-section .section-lead{color:#CBD5E1}
    .cta-points{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:14px}
    .cta-points li{display:flex;gap:10px;align-items:flex-start;color:#DDE5DF;font-weight:650}
    .form-card{
      background:#fff;
      border-radius:var(--radius-xl);
      padding:28px;
      box-shadow:var(--shadow-lg);
      border:1px solid rgba(255,255,255,.35);
      color:var(--text);
    }
    .form-card h3{color:var(--heading);font-weight:900;margin-bottom:18px}
    .form-label{font-weight:800;color:#24404a;margin-bottom:8px}
    .form-control,.form-select{
      min-height:50px;
      border-radius:14px;
      border:1px solid var(--border);
      background:#F8FAFC;
      color:var(--text);
      padding:12px 14px;
    }
    textarea.form-control{min-height:126px;resize:vertical}
    .form-control::placeholder{color:#94A3B8}
    .form-control:focus,.form-select:focus{
      border-color:var(--primary);
      background:#fff;
    }
    .privacy-text{font-size:13px;color:var(--muted);margin:12px 0 0}
    .site-footer{
      background:var(--footer);
      color:#CBD5E1;
      padding:58px 0 28px;
      border-top:1px solid rgba(255,255,255,.08);
    }
    .footer-logo{color:#fff;margin-bottom:14px}
    .footer-logo .brand-text span{color:#94A3B8}
    .footer-about{color:#B6C2D1;max-width:430px;margin:0}
    .footer-title{
      color:#fff;
      font-size:16px;
      font-weight:900;
      margin-bottom:14px;
    }
    .footer-links{list-style:none;padding:0;margin:0;display:grid;gap:9px}
    .footer-links a{color:#CBD5E1;font-weight:650}
    .footer-links a:hover{color:#A7F3D0;padding-left:4px}
    .footer-tags{display:flex;flex-wrap:wrap;gap:8px}
    .footer-tags .tag{background:rgba(255,255,255,.08);color:#D1FAE5;border-color:rgba(255,255,255,.11)}
    .footer-bottom{
      margin-top:38px;
      padding-top:22px;
      border-top:1px solid rgba(255,255,255,.08);
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
      color:#94A3B8;
      font-size:14px;
    }
    @media (max-width:1199.98px){
      .matrix-grid{grid-template-columns:1fr 1fr}
      .matrix-card.feature{grid-column:1/-1;grid-row:auto;min-height:330px}
      .compare-wrap{grid-template-columns:1fr}
    }
    @media (max-width:991.98px){
      .navbar-collapse{
        margin-top:12px;
        padding:14px;
        border-radius:22px;
        background:rgba(255,252,247,.96);
        border:1px solid rgba(15,118,110,.13);
        box-shadow:var(--shadow-md);
      }
      .navbar-nav{align-items:stretch}
      .nav-link{justify-content:flex-start}
      .nav-cta{margin-top:8px;width:100%}
      .hero{padding:72px 0 56px}
      .hero-panel{margin-top:24px}
      .section{padding:68px 0}
      .dashboard-grid{grid-template-columns:1fr 1fr}
      .insight-strip{grid-template-columns:1fr}
    }
    @media (max-width:767.98px){
      .site-container{width:min(100% - 24px,var(--container))}
      .hero h1{font-size:34px}
      .hero-subtitle{font-size:16px}
      .hero-actions .btn-brand,.hero-actions .btn-outline-brand{width:100%}
      .trust-row{display:grid;grid-template-columns:1fr;width:100%}
      .metrics-board{margin-top:0;padding-top:20px}
      .matrix-grid{grid-template-columns:1fr}
      .compare-row{grid-template-columns:1fr}
      .mini-stats{grid-template-columns:1fr}
      .dashboard-grid{grid-template-columns:1fr}
      .section{padding:56px 0}
      .section-tight{padding:46px 0}
      .form-card{padding:22px}
      .footer-bottom{display:grid}
    }
    @media (max-width:575.98px){
      .brand-text span{display:none}
      .logo-mark{width:40px;height:40px;border-radius:14px}
      .navbar{padding:10px 0}
      .hero{padding:56px 0 42px}
      .panel-top{align-items:flex-start;flex-direction:column}
      .metric-card,.matrix-card,.topic-body,.insight-card{padding:20px}
      .section-title{font-size:27px}
      .btn-brand,.btn-outline-brand,.btn-amber{width:100%;padding-inline:18px}
    }

/* roulang page: category1 */
:root{
      --primary:#0F766E;
      --primary-dark:#115E59;
      --primary-soft:#ECFDF5;
      --secondary:#334155;
      --accent:#F59E0B;
      --accent-dark:#B45309;
      --base:#F7F4EE;
      --surface:#FFFFFF;
      --surface-warm:#FFFCF7;
      --title:#102A2A;
      --text:#334155;
      --muted:#64748B;
      --border:#DDE5DF;
      --footer:#102A2A;
      --shadow-sm:0 10px 28px rgba(15,23,42,.06);
      --shadow-md:0 18px 45px rgba(15,23,42,.08);
      --shadow-lg:0 28px 70px rgba(15,23,42,.12);
      --radius-sm:14px;
      --radius-md:18px;
      --radius-lg:24px;
      --radius-xl:32px;
      --container:1200px;
      --transition:220ms ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at 12% 8%, rgba(15,118,110,.08), transparent 28%),
        radial-gradient(circle at 86% 12%, rgba(245,158,11,.09), transparent 24%),
        var(--base);
      font-size:16px;
      line-height:1.75;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:color var(--transition),background var(--transition),border-color var(--transition),box-shadow var(--transition),transform var(--transition)}
    img{display:block;max-width:100%;height:auto}
    button,input,select,textarea{font:inherit}
    button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{
      outline:0;
      box-shadow:0 0 0 4px rgba(15,118,110,.18)!important;
    }
    ::selection{background:rgba(15,118,110,.18);color:var(--title)}
    .site-container{
      width:min(100% - 32px,var(--container));
      margin-inline:auto;
    }
    .section{padding:84px 0}
    .section-sm{padding:58px 0}
    .section-title{
      max-width:760px;
      margin-bottom:34px;
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:var(--primary-soft);
      color:var(--primary-dark);
      font-size:13px;
      font-weight:700;
      border:1px solid rgba(15,118,110,.14);
      margin-bottom:14px;
    }
    .eyebrow::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 4px rgba(245,158,11,.14);
    }
    h1,h2,h3,h4{
      color:var(--title);
      letter-spacing:-.02em;
      font-weight:800;
      margin:0;
    }
    h1{font-size:clamp(34px,5vw,54px);line-height:1.16}
    h2{font-size:clamp(27px,3vw,38px);line-height:1.25}
    h3{font-size:22px;line-height:1.35}
    p{margin:0}
    .lead-text{
      color:#475569;
      font-size:18px;
      line-height:1.85;
      margin-top:18px;
    }
    .muted{color:var(--muted)}
    .site-header{
      position:sticky;
      top:0;
      z-index:1000;
      background:rgba(255,252,247,.88);
      backdrop-filter:blur(16px);
      border-bottom:1px solid rgba(15,118,110,.12);
      box-shadow:0 8px 26px rgba(15,23,42,.04);
    }
    .site-header .navbar{padding:14px 0}
    .site-header .site-container{
      display:flex;
      align-items:center;
      width:min(100% - 32px,var(--container));
    }
    .brand-logo{
      display:inline-flex;
      align-items:center;
      gap:12px;
      min-width:max-content;
    }
    .logo-mark{
      width:44px;
      height:44px;
      border-radius:15px;
      position:relative;
      background:linear-gradient(135deg,var(--primary),var(--primary-dark));
      box-shadow:0 14px 28px rgba(15,118,110,.22);
      overflow:hidden;
    }
    .logo-mark::before{
      content:"";
      position:absolute;
      inset:10px 12px;
      border-left:4px solid #fff;
      border-bottom:4px solid #fff;
      transform:skew(-12deg);
      border-radius:2px;
    }
    .logo-mark::after{
      content:"";
      position:absolute;
      width:26px;
      height:3px;
      right:8px;
      top:15px;
      background:var(--accent);
      transform:rotate(33deg);
      border-radius:999px;
      box-shadow:-10px 13px 0 rgba(255,255,255,.72);
    }
    .brand-text{display:flex;flex-direction:column;line-height:1.2}
    .brand-text strong{
      color:var(--title);
      font-size:18px;
      letter-spacing:.02em;
    }
    .brand-text span{
      color:var(--muted);
      font-size:12px;
      margin-top:3px;
    }
    .navbar-collapse{align-items:center}
    .navbar-nav{gap:8px;align-items:center}
    .nav-link{
      color:var(--secondary);
      font-weight:700;
      padding:10px 14px!important;
      border-radius:999px;
      position:relative;
      min-height:44px;
      display:flex;
      align-items:center;
    }
    .nav-link:hover{
      color:var(--primary-dark);
      background:rgba(15,118,110,.08);
    }
    .nav-link.active{
      color:var(--primary-dark);
      background:var(--primary-soft);
      box-shadow:inset 0 0 0 1px rgba(15,118,110,.12);
    }
    .btn-brand{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      border-radius:999px;
      padding:12px 22px;
      background:var(--primary);
      color:#fff;
      font-weight:800;
      border:1px solid transparent;
      box-shadow:0 12px 26px rgba(15,118,110,.22);
      min-height:46px;
    }
    .btn-brand:hover{
      color:#fff;
      background:var(--primary-dark);
      transform:translateY(-2px);
      box-shadow:0 18px 34px rgba(15,118,110,.26);
    }
    .btn-outline-brand{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      border-radius:999px;
      padding:12px 22px;
      background:#fff;
      color:var(--primary-dark);
      border:1px solid rgba(15,118,110,.28);
      font-weight:800;
      min-height:46px;
    }
    .btn-outline-brand:hover{
      background:var(--primary-soft);
      color:var(--primary-dark);
      transform:translateY(-2px);
      box-shadow:var(--shadow-sm);
    }
    .navbar-toggler{
      border:1px solid rgba(15,118,110,.18);
      border-radius:14px;
      width:48px;
      height:44px;
      padding:0;
      background:#fff;
    }
    .navbar-toggler:focus{box-shadow:0 0 0 4px rgba(15,118,110,.16)}
    .toggler-lines{
      display:flex;
      flex-direction:column;
      align-items:center;
      gap:5px;
    }
    .toggler-lines span{
      width:22px;
      height:2px;
      border-radius:999px;
      background:var(--primary-dark);
    }
    .topic-hero{
      position:relative;
      padding:84px 0 74px;
      overflow:hidden;
      border-bottom:1px solid rgba(15,118,110,.10);
    }
    .topic-hero::before{
      content:"";
      position:absolute;
      inset:0;
      background-image:
        linear-gradient(rgba(15,118,110,.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15,118,110,.055) 1px, transparent 1px);
      background-size:38px 38px;
      mask-image:linear-gradient(to bottom, #000 0%, transparent 82%);
      pointer-events:none;
    }
    .breadcrumb-line{
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:18px;
      color:var(--muted);
      font-size:14px;
      font-weight:700;
    }
    .breadcrumb-line a{color:var(--primary-dark)}
    .breadcrumb-line span:last-child{color:var(--title)}
    .hero-actions{
      display:flex;
      gap:14px;
      flex-wrap:wrap;
      margin-top:30px;
    }
    .hero-metrics{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:12px;
      margin-top:32px;
    }
    .hero-metric{
      background:rgba(255,255,255,.78);
      border:1px solid rgba(15,118,110,.14);
      border-radius:18px;
      padding:16px;
      box-shadow:var(--shadow-sm);
    }
    .hero-metric strong{
      display:block;
      color:var(--primary-dark);
      font-size:24px;
      line-height:1;
      margin-bottom:8px;
    }
    .hero-metric span{
      color:var(--muted);
      font-size:13px;
      font-weight:700;
    }
    .topic-cover{
      position:relative;
      border-radius:32px;
      overflow:hidden;
      min-height:430px;
      box-shadow:var(--shadow-lg);
      border:1px solid rgba(15,118,110,.16);
      background:#fff;
    }
    .topic-cover img{
      width:100%;
      height:430px;
      object-fit:cover;
    }
    .topic-cover::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg,rgba(16,42,42,.08),rgba(16,42,42,.62));
    }
    .cover-panel{
      position:absolute;
      left:24px;
      right:24px;
      bottom:24px;
      z-index:2;
      padding:22px;
      border-radius:24px;
      color:#fff;
      background:rgba(16,42,42,.78);
      backdrop-filter:blur(12px);
      border:1px solid rgba(255,255,255,.16);
    }
    .cover-panel strong{
      display:block;
      font-size:22px;
      margin-bottom:8px;
    }
    .cover-panel p{color:#DDEFE9;font-size:14px}
    .info-strip-wrap{
      display:grid;
      gap:16px;
    }
    .info-strip{
      display:grid;
      grid-template-columns:auto 1fr auto;
      gap:18px;
      align-items:center;
      padding:22px;
      border-radius:22px;
      background:var(--surface);
      border:1px solid rgba(15,118,110,.13);
      box-shadow:var(--shadow-sm);
      transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
    }
    .info-strip:hover{
      transform:translateY(-3px);
      border-color:rgba(15,118,110,.32);
      box-shadow:var(--shadow-md);
    }
    .strip-icon{
      width:52px;
      height:52px;
      border-radius:17px;
      display:grid;
      place-items:center;
      background:var(--primary-soft);
      color:var(--primary-dark);
      font-weight:900;
      font-size:20px;
      border:1px solid rgba(15,118,110,.12);
    }
    .strip-tag,.tag{
      display:inline-flex;
      align-items:center;
      border-radius:999px;
      padding:6px 10px;
      color:var(--primary-dark);
      background:var(--primary-soft);
      border:1px solid rgba(15,118,110,.12);
      font-size:13px;
      font-weight:800;
      white-space:nowrap;
    }
    .tag-accent{
      background:rgba(245,158,11,.12);
      color:var(--accent-dark);
      border-color:rgba(245,158,11,.2);
    }
    .content-card{
      display:grid;
      grid-template-columns:190px 1fr;
      gap:22px;
      padding:20px;
      border-radius:26px;
      background:var(--surface);
      border:1px solid rgba(15,118,110,.13);
      box-shadow:var(--shadow-sm);
      margin-bottom:18px;
      transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
    }
    .content-card:hover{
      transform:translateY(-4px);
      border-color:rgba(15,118,110,.35);
      box-shadow:var(--shadow-md);
    }
    .content-thumb{
      border-radius:22px;
      overflow:hidden;
      min-height:150px;
      background:var(--primary-soft);
      position:relative;
    }
    .content-thumb img{
      width:100%;
      height:100%;
      min-height:150px;
      object-fit:cover;
    }
    .content-thumb::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg,transparent,rgba(16,42,42,.28));
    }
    .content-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      align-items:center;
      color:var(--muted);
      font-size:13px;
      font-weight:700;
      margin-bottom:10px;
    }
    .content-card h3 a{color:var(--title)}
    .content-card h3 a:hover{color:var(--primary-dark)}
    .content-card p{
      color:#475569;
      margin-top:10px;
      margin-bottom:16px;
    }
    .tag-row{
      display:flex;
      gap:8px;
      flex-wrap:wrap;
      margin-bottom:18px;
    }
    .text-link{
      display:inline-flex;
      align-items:center;
      color:var(--primary-dark);
      font-weight:900;
    }
    .text-link:hover{color:var(--accent-dark);transform:translateX(3px)}
    .sidebar-stack{
      position:sticky;
      top:96px;
      display:grid;
      gap:18px;
    }
    .side-card{
      padding:24px;
      border-radius:26px;
      background:var(--surface-warm);
      border:1px solid rgba(15,118,110,.14);
      box-shadow:var(--shadow-sm);
    }
    .side-card.dark{
      background:linear-gradient(135deg,var(--primary-dark),#0B3B3A);
      color:#fff;
      overflow:hidden;
      position:relative;
    }
    .side-card.dark::after{
      content:"";
      position:absolute;
      width:150px;
      height:150px;
      right:-70px;
      top:-70px;
      border-radius:50%;
      background:rgba(245,158,11,.18);
    }
    .side-card h3{
      font-size:20px;
      margin-bottom:14px;
    }
    .side-card.dark h3{color:#fff}
    .side-card.dark p{color:#D7F7EF;position:relative;z-index:1}
    .side-card.dark .btn-brand{
      position:relative;
      z-index:1;
      margin-top:18px;
      background:var(--accent);
      color:#1F2937;
      box-shadow:none;
    }
    .side-card.dark .btn-brand:hover{background:#D97706;color:#fff}
    .keyword-cloud{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .toc-list,.path-list{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:10px;
    }
    .toc-list a,.path-list li{
      display:flex;
      justify-content:space-between;
      gap:12px;
      align-items:center;
      padding:11px 12px;
      border-radius:14px;
      color:#475569;
      background:#fff;
      border:1px solid rgba(15,118,110,.10);
      font-weight:700;
    }
    .toc-list a:hover{
      color:var(--primary-dark);
      background:var(--primary-soft);
      transform:translateX(3px);
    }
    .path-list li span:first-child{color:var(--primary-dark);font-weight:900}
    .faq-section{
      background:linear-gradient(180deg,rgba(236,253,245,.8),rgba(247,244,238,.1));
    }
    .accordion{
      display:grid;
      gap:14px;
    }
    .accordion-item{
      border:1px solid rgba(15,118,110,.14)!important;
      border-radius:18px!important;
      overflow:hidden;
      background:#fff;
      box-shadow:var(--shadow-sm);
    }
    .accordion-button{
      color:var(--title);
      font-weight:800;
      font-size:17px;
      padding:20px 22px;
      background:#fff;
      box-shadow:none!important;
    }
    .accordion-button:not(.collapsed){
      color:var(--primary-dark);
      background:var(--primary-soft);
    }
    .accordion-button::after{
      width:18px;
      height:18px;
      border-radius:50%;
      background-color:rgba(15,118,110,.12);
      background-size:12px;
      background-position:center;
      padding:12px;
    }
    .accordion-body{
      padding:0 22px 22px;
      color:#475569;
      line-height:1.85;
    }
    .cta-band{
      position:relative;
      overflow:hidden;
      border-radius:32px;
      background:
        linear-gradient(135deg,rgba(17,94,89,.96),rgba(16,42,42,.96)),
        url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
      padding:44px;
      color:#fff;
      box-shadow:var(--shadow-lg);
      border:1px solid rgba(255,255,255,.14);
    }
    .cta-band::before{
      content:"";
      position:absolute;
      inset:0;
      background-image:
        linear-gradient(rgba(255,255,255,.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.08) 1px, transparent 1px);
      background-size:34px 34px;
      opacity:.46;
    }
    .cta-band > *{position:relative;z-index:1}
    .cta-band h2{color:#fff}
    .cta-band p{color:#D7F7EF;margin-top:14px}
    .cta-points{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
      margin-top:22px;
    }
    .cta-points span{
      display:inline-flex;
      padding:7px 11px;
      border-radius:999px;
      background:rgba(255,255,255,.12);
      border:1px solid rgba(255,255,255,.15);
      color:#EFFDF9;
      font-size:13px;
      font-weight:800;
    }
    .btn-warm{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      border-radius:999px;
      padding:12px 22px;
      background:var(--accent);
      color:#1F2937;
      font-weight:900;
      min-height:46px;
      border:1px solid transparent;
    }
    .btn-warm:hover{
      background:#D97706;
      color:#fff;
      transform:translateY(-2px);
      box-shadow:0 16px 30px rgba(245,158,11,.25);
    }
    .site-footer{
      background:var(--footer);
      color:#CBD5E1;
      padding:64px 0 28px;
    }
    .footer-logo .brand-text strong{color:#fff}
    .footer-logo .brand-text span{color:#A7F3D0}
    .footer-about{
      margin-top:18px;
      max-width:520px;
      color:#CBD5E1;
      line-height:1.85;
    }
    .footer-title{
      color:#fff;
      font-size:17px;
      margin-bottom:16px;
    }
    .footer-links{
      list-style:none;
      padding:0;
      margin:0;
      display:grid;
      gap:10px;
    }
    .footer-links a{color:#CBD5E1}
    .footer-links a:hover{color:#A7F3D0;transform:translateX(3px)}
    .footer-tags{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
    }
    .footer-tags .tag{
      background:rgba(167,243,208,.08);
      color:#A7F3D0;
      border-color:rgba(167,243,208,.18);
    }
    .footer-bottom{
      display:flex;
      justify-content:space-between;
      gap:18px;
      flex-wrap:wrap;
      margin-top:42px;
      padding-top:22px;
      border-top:1px solid rgba(203,213,225,.16);
      color:#94A3B8;
      font-size:14px;
    }
    @media (max-width: 991.98px){
      .site-header .site-container{flex-wrap:wrap}
      .navbar-collapse{
        margin-top:14px;
        padding:16px;
        background:#FFFCF7;
        border:1px solid rgba(15,118,110,.14);
        border-radius:22px;
        box-shadow:var(--shadow-md);
      }
      .navbar-nav{align-items:stretch;gap:6px}
      .nav-link{justify-content:center}
      .nav-cta{width:100%;margin-top:8px}
      .topic-hero{padding:64px 0}
      .topic-cover{margin-top:34px;min-height:360px}
      .topic-cover img{height:360px}
      .hero-metrics{grid-template-columns:repeat(3,1fr)}
      .sidebar-stack{position:static;margin-top:24px}
      .section{padding:66px 0}
      .cta-band{padding:34px}
    }
    @media (max-width: 767.98px){
      .site-container{width:min(100% - 24px,var(--container))}
      .hero-metrics{grid-template-columns:1fr}
      .hero-actions .btn-brand,.hero-actions .btn-outline-brand{width:100%}
      .info-strip{grid-template-columns:1fr;gap:12px}
      .strip-tag{width:max-content}
      .content-card{grid-template-columns:1fr}
      .content-thumb img,.content-thumb{min-height:190px}
      .cover-panel{left:16px;right:16px;bottom:16px;padding:18px}
      .cta-band{text-align:left;border-radius:26px;padding:28px}
      .cta-band .d-flex{align-items:stretch!important}
      .cta-band .btn-warm,.cta-band .btn-outline-brand{width:100%}
      .footer-bottom{flex-direction:column}
    }
    @media (max-width: 520px){
      body{font-size:15px}
      .brand-text span{display:none}
      .logo-mark{width:40px;height:40px;border-radius:14px}
      .topic-hero{padding:48px 0}
      .lead-text{font-size:16px}
      .section{padding:54px 0}
      .section-sm{padding:44px 0}
      .topic-cover,.topic-cover img{min-height:310px;height:310px}
      .content-card{padding:16px;border-radius:22px}
      .side-card{padding:20px;border-radius:22px}
    }