/* roulang page: index */
:root{
      --bg: #07110f;
      --bg-soft: #0c1714;
      --surface: #101c19;
      --surface-2: #162623;
      --surface-3: #1c2f2b;
      --text: #eef5f2;
      --muted: #aab8b3;
      --line: rgba(255,255,255,.10);
      --line-strong: rgba(255,255,255,.18);
      --brand: #3ee6b2;
      --brand-2: #f0c86b;
      --brand-3: #8adfcb;
      --shadow: 0 18px 50px rgba(0,0,0,.28);
      --shadow-soft: 0 10px 28px rgba(0,0,0,.18);
      --radius: 18px;
      --radius-sm: 14px;
      --radius-lg: 26px;
      --container: 1240px;
      --gap: 24px;
      --pad: clamp(18px, 2vw, 28px);
      --transition: 180ms ease;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family: "PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
      background:
        radial-gradient(circle at top left, rgba(62,230,178,.12), transparent 28%),
        radial-gradient(circle at top right, rgba(240,200,107,.08), transparent 24%),
        linear-gradient(180deg, #08110f 0%, #0a1412 45%, #07100e 100%);
      color:var(--text);
      line-height:1.7;
      min-height:100vh;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
    }

    a{
      color:inherit;
      text-decoration:none;
      transition: color var(--transition), transform var(--transition), border-color var(--transition), background-color var(--transition), box-shadow var(--transition), opacity var(--transition);
    }

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

    button,
    input,
    textarea{
      font:inherit;
      color:inherit;
    }

    button{
      border:0;
      background:none;
      cursor:pointer;
    }

    ::selection{
      background:rgba(62,230,178,.28);
      color:#fff;
    }

    .container{
      width:min(var(--container), calc(100% - 32px));
      margin:0 auto;
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      backdrop-filter:none;
      background:rgba(7,17,15,.94);
      border-bottom:1px solid var(--line);
    }

    .header-inner{
      min-height:74px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:10px 0;
    }

    .logo{
      display:inline-flex;
      align-items:center;
      gap:12px;
      font-weight:800;
      letter-spacing:.3px;
      white-space:nowrap;
    }

    .logo-mark{
      width:38px;
      height:38px;
      border-radius:14px;
      background:
        linear-gradient(135deg, rgba(62,230,178,.95), rgba(62,230,178,.18)),
        linear-gradient(180deg, #12302a, #091210);
      border:1px solid rgba(62,230,178,.28);
      box-shadow: inset 0 0 0 1px rgba(255,255,255,.04);
      display:grid;
      place-items:center;
      color:#06110f;
      font-size:15px;
      font-weight:900;
    }

    .logo-text{
      display:flex;
      flex-direction:column;
      line-height:1.1;
    }

    .logo-text strong{
      font-size:1.02rem;
      color:var(--text);
    }

    .logo-text span{
      font-size:.82rem;
      color:var(--muted);
      margin-top:4px;
      font-weight:500;
    }

    .nav-wrap{
      display:flex;
      align-items:center;
      gap:14px;
    }

    .nav-toggle{
      display:none;
      width:46px;
      height:46px;
      border-radius:14px;
      border:1px solid var(--line);
      background:linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01));
      align-items:center;
      justify-content:center;
      gap:4px;
      box-shadow:none;
    }

    .nav-toggle span{
      width:18px;
      height:2px;
      border-radius:99px;
      background:var(--text);
      display:block;
      position:relative;
    }

    .nav-toggle span::before,
    .nav-toggle span::after{
      content:"";
      position:absolute;
      left:0;
      width:18px;
      height:2px;
      border-radius:99px;
      background:var(--text);
      transition:transform var(--transition), top var(--transition), opacity var(--transition);
    }

    .nav-toggle span::before{top:-6px}
    .nav-toggle span::after{top:6px}

    .nav-toggle.is-open span{background:transparent}
    .nav-toggle.is-open span::before{top:0;transform:rotate(45deg)}
    .nav-toggle.is-open span::after{top:0;transform:rotate(-45deg)}

    .nav{
      display:flex;
      align-items:center;
      gap:8px;
    }

    .nav a{
      position:relative;
      padding:12px 16px;
      border-radius:999px;
      color:var(--muted);
      border:1px solid transparent;
      font-weight:600;
      letter-spacing:.2px;
    }

    .nav a:hover,
    .nav a:focus-visible{
      color:var(--text);
      background:rgba(255,255,255,.03);
      border-color:var(--line);
      transform:translateY(-1px);
      outline:none;
    }

    .nav a.is-active{
      color:var(--text);
      background:linear-gradient(180deg, rgba(62,230,178,.14), rgba(62,230,178,.06));
      border-color:rgba(62,230,178,.26);
    }

    .nav a.is-active::after{
      content:"";
      position:absolute;
      left:50%;
      transform:translateX(-50%);
      bottom:-10px;
      width:22px;
      height:3px;
      border-radius:999px;
      background:var(--brand);
      box-shadow:0 0 0 4px rgba(62,230,178,.08);
    }

    .hero{
      position:relative;
      overflow:hidden;
      border-bottom:1px solid var(--line);
      background:
        linear-gradient(180deg, rgba(7,17,15,.25), rgba(7,17,15,.78)),
        url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    }

    .hero::before{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(135deg, rgba(2,10,9,.68) 0%, rgba(2,10,9,.48) 56%, rgba(2,10,9,.72) 100%);
      pointer-events:none;
    }

    .hero-inner{
      position:relative;
      z-index:1;
      padding:clamp(64px, 10vw, 110px) 0 clamp(38px, 6vw, 66px);
    }

    .hero-grid{
      display:grid;
      grid-template-columns: 1.15fr .85fr;
      gap:28px;
      align-items:center;
    }

    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:10px;
      padding:8px 14px;
      border-radius:999px;
      background:rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.12);
      color:#f7f9f8;
      font-size:.9rem;
      letter-spacing:.3px;
      margin-bottom:18px;
    }

    .eyebrow::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--brand);
      box-shadow:0 0 0 5px rgba(62,230,178,.12);
    }

    h1{
      margin:0;
      font-size:clamp(2.2rem, 4.8vw, 4.4rem);
      line-height:1.08;
      letter-spacing:-.02em;
      max-width:11ch;
      text-shadow:0 12px 24px rgba(0,0,0,.35);
    }

    .hero p{
      margin:18px 0 0;
      max-width:60ch;
      font-size:1.04rem;
      color:rgba(238,245,242,.88);
    }

    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:14px;
      margin-top:28px;
    }

    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      min-height:48px;
      padding:0 20px;
      border-radius:999px;
      font-weight:700;
      letter-spacing:.2px;
      border:1px solid transparent;
      transition:transform var(--transition), background-color var(--transition), border-color var(--transition), box-shadow var(--transition), color var(--transition), opacity var(--transition);
      will-change:transform;
    }

    .btn:hover,
    .btn:focus-visible{
      transform:translateY(-2px);
      outline:none;
    }

    .btn-primary{
      background:linear-gradient(135deg, var(--brand), #23c79b);
      color:#05100e;
      box-shadow:0 12px 28px rgba(62,230,178,.18);
    }

    .btn-primary:hover,
    .btn-primary:focus-visible{
      box-shadow:0 16px 30px rgba(62,230,178,.24);
    }

    .btn-outline{
      background:rgba(255,255,255,.04);
      color:var(--text);
      border-color:rgba(255,255,255,.16);
    }

    .btn-outline:hover,
    .btn-outline:focus-visible{
      background:rgba(255,255,255,.08);
      border-color:rgba(255,255,255,.24);
    }

    .hero-tags{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:24px;
    }

    .tag{
      display:inline-flex;
      align-items:center;
      min-height:34px;
      padding:0 14px;
      border-radius:999px;
      background:rgba(255,255,255,.06);
      color:#eff7f4;
      border:1px solid rgba(255,255,255,.10);
      font-size:.93rem;
    }

    .hero-panel{
      position:relative;
      background:linear-gradient(180deg, rgba(19,33,30,.92), rgba(12,22,20,.96));
      border:1px solid rgba(255,255,255,.10);
      border-radius:var(--radius-lg);
      box-shadow:var(--shadow);
      overflow:hidden;
    }

    .hero-panel__media{
      position:relative;
      min-height:320px;
      background:
        linear-gradient(180deg, rgba(8,15,14,.08), rgba(8,15,14,.74)),
        url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
    }

    .hero-panel__media::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg, rgba(12,18,16,.08), rgba(12,18,16,.68));
    }

    .hero-panel__body{
      padding:20px;
    }

    .hero-panel__title{
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:12px;
      margin-bottom:14px;
    }

    .hero-panel__title strong{
      font-size:1.02rem;
    }

    .stamp{
      padding:6px 10px;
      border-radius:999px;
      background:rgba(240,200,107,.12);
      color:#f4dc9b;
      border:1px solid rgba(240,200,107,.24);
      font-size:.82rem;
      white-space:nowrap;
    }

    .hero-list{
      display:grid;
      gap:12px;
      margin:0;
      padding:0;
      list-style:none;
    }

    .hero-list li{
      display:flex;
      align-items:flex-start;
      gap:10px;
      color:var(--muted);
      padding:12px 14px;
      border-radius:16px;
      background:rgba(255,255,255,.03);
      border:1px solid rgba(255,255,255,.08);
    }

    .hero-list li::before{
      content:"";
      width:10px;
      height:10px;
      margin-top:6px;
      border-radius:50%;
      background:var(--brand);
      flex:0 0 auto;
      box-shadow:0 0 0 4px rgba(62,230,178,.12);
    }

    .hero-list strong{
      color:var(--text);
      display:block;
      margin-bottom:2px;
    }

    .main{
      padding:clamp(28px, 4vw, 50px) 0 0;
    }

    .section{
      padding:clamp(30px, 5vw, 54px) 0;
    }

    .section-head{
      display:flex;
      justify-content:space-between;
      align-items:flex-end;
      gap:18px;
      margin-bottom:22px;
    }

    .section-title{
      margin:0;
      font-size:clamp(1.5rem, 2.5vw, 2.2rem);
      line-height:1.15;
      letter-spacing:-.02em;
    }

    .section-desc{
      margin:10px 0 0;
      max-width:68ch;
      color:var(--muted);
    }

    .info-strip{
      display:grid;
      grid-template-columns:repeat(4, minmax(0, 1fr));
      gap:16px;
      margin-top:-18px;
    }

    .info-card{
      padding:18px 18px 20px;
      border-radius:var(--radius);
      background:linear-gradient(180deg, rgba(18,30,27,.98), rgba(11,20,18,.98));
      border:1px solid var(--line);
      box-shadow:var(--shadow-soft);
      transition:transform var(--transition), box-shadow var(--transition), border-color var(--transition);
      min-height:152px;
    }

    .info-card:hover{
      transform:translateY(-2px);
      border-color:rgba(62,230,178,.24);
      box-shadow:0 16px 30px rgba(0,0,0,.22);
    }

    .info-card__top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      margin-bottom:14px;
    }

    .info-dot{
      width:11px;
      height:11px;
      border-radius:50%;
      background:var(--brand);
      box-shadow:0 0 0 5px rgba(62,230,178,.12);
      flex:0 0 auto;
    }

    .info-card h3{
      margin:0;
      font-size:1.05rem;
    }

    .info-card p{
      margin:0;
      color:var(--muted);
      font-size:.96rem;
    }

    .feature-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr;
      gap:18px;
      align-items:stretch;
    }

    .feature-hero{
      position:relative;
      min-height:380px;
      border-radius:var(--radius-lg);
      overflow:hidden;
      background:
        linear-gradient(180deg, rgba(6,12,11,.08), rgba(6,12,11,.78)),
        url('/assets/images/coverpic/cover-1.webp') center/cover no-repeat;
      border:1px solid var(--line);
      box-shadow:var(--shadow);
    }

    .feature-hero::after{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(180deg, rgba(7,16,14,.18), rgba(7,16,14,.84));
    }

    .feature-hero__content{
      position:absolute;
      inset:auto 0 0 0;
      z-index:1;
      padding:24px;
    }

    .feature-hero__content h3{
      margin:0 0 10px;
      font-size:1.6rem;
      line-height:1.2;
    }

    .feature-hero__content p{
      margin:0 0 18px;
      max-width:50ch;
      color:rgba(238,245,242,.86);
    }

    .feature-grid__side{
      display:grid;
      grid-template-columns:1fr;
      gap:18px;
    }

    .mini-card{
      position:relative;
      overflow:hidden;
      min-height:180px;
      border-radius:var(--radius);
      border:1px solid var(--line);
      background:linear-gradient(180deg, rgba(16,28,25,.98), rgba(12,22,20,.98));
      box-shadow:var(--shadow-soft);
      transition:transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    }

    .mini-card:hover{
      transform:translateY(-2px);
      border-color:rgba(62,230,178,.24);
      box-shadow:0 16px 28px rgba(0,0,0,.24);
    }

    .mini-card__img{
      width:100%;
      aspect-ratio:16/10;
      object-fit:cover;
      filter:saturate(1.03);
    }

    .mini-card__body{
      padding:16px 16px 18px;
    }

    .mini-card h3{
      margin:0 0 8px;
      font-size:1.06rem;
    }

    .mini-card p{
      margin:0;
      color:var(--muted);
      font-size:.95rem;
    }

    .mini-card .meta{
      display:flex;
      gap:8px;
      flex-wrap:wrap;
      margin-top:12px;
    }

    .pill{
      display:inline-flex;
      align-items:center;
      min-height:28px;
      padding:0 10px;
      border-radius:999px;
      background:rgba(255,255,255,.05);
      border:1px solid rgba(255,255,255,.08);
      color:#e7f2ef;
      font-size:.83rem;
    }

    .split{
      display:grid;
      grid-template-columns: .95fr 1.05fr;
      gap:18px;
      align-items:center;
    }

    .split-media{
      border-radius:var(--radius-lg);
      overflow:hidden;
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      background:linear-gradient(180deg, rgba(18,30,27,.96), rgba(11,20,18,.96));
    }

    .split-media img{
      width:100%;
      height:100%;
      object-fit:cover;
      aspect-ratio: 4 / 3;
    }

    .split-body{
      padding:10px 0;
    }

    .list-grid{
      display:grid;
      gap:12px;
      margin:18px 0 0;
      padding:0;
      list-style:none;
    }

    .list-grid li{
      display:flex;
      gap:12px;
      padding:15px 16px;
      border-radius:16px;
      background:rgba(255,255,255,.03);
      border:1px solid rgba(255,255,255,.08);
      color:var(--muted);
    }

    .list-grid li::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      margin-top:9px;
      background:var(--brand-2);
      box-shadow:0 0 0 4px rgba(240,200,107,.11);
      flex:0 0 auto;
    }

    .steps-grid{
      display:grid;
      grid-template-columns:repeat(3, minmax(0, 1fr));
      gap:16px;
    }

    .step-card{
      padding:20px;
      border-radius:var(--radius);
      background:linear-gradient(180deg, rgba(16,28,25,.98), rgba(11,20,18,.98));
      border:1px solid var(--line);
      box-shadow:var(--shadow-soft);
      min-height:210px;
      position:relative;
      overflow:hidden;
      transition:transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    }

    .step-card:hover{
      transform:translateY(-2px);
      border-color:rgba(240,200,107,.22);
      box-shadow:0 16px 28px rgba(0,0,0,.24);
    }

    .step-index{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width:42px;
      height:42px;
      border-radius:14px;
      background:linear-gradient(135deg, rgba(62,230,178,.18), rgba(62,230,178,.06));
      border:1px solid rgba(62,230,178,.22);
      color:#c9fff0;
      font-weight:800;
      margin-bottom:16px;
    }

    .step-card h3{
      margin:0 0 10px;
      font-size:1.08rem;
    }

    .step-card p{
      margin:0;
      color:var(--muted);
    }

    .step-tags{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-top:16px;
    }

    .step-tags .pill{
      color:#dce8e4;
    }

    .faq{
      display:grid;
      gap:12px;
    }

    .faq-item{
      border-radius:16px;
      overflow:hidden;
      border:1px solid var(--line);
      background:linear-gradient(180deg, rgba(16,28,25,.98), rgba(11,20,18,.98));
      box-shadow:var(--shadow-soft);
    }

    .faq-q{
      width:100%;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:18px 20px;
      text-align:left;
      background:none;
      color:var(--text);
      font-weight:700;
      transition:background-color var(--transition), color var(--transition);
    }

    .faq-q:hover,
    .faq-q:focus-visible{
      background:rgba(255,255,255,.03);
      outline:none;
    }

    .faq-q .arrow{
      width:14px;
      height:14px;
      border-right:2px solid var(--muted);
      border-bottom:2px solid var(--muted);
      transform:rotate(45deg);
      transition:transform var(--transition), border-color var(--transition);
      flex:0 0 auto;
      margin-left:8px;
    }

    .faq-item.is-open .faq-q .arrow{
      transform:rotate(-135deg);
      border-color:var(--brand);
    }

    .faq-a{
      max-height:0;
      overflow:hidden;
      transition:max-height 260ms ease;
      border-top:1px solid transparent;
    }

    .faq-a-inner{
      padding:0 20px 18px;
      color:var(--muted);
    }

    .faq-item.is-open .faq-a{
      border-top-color:var(--line);
    }

    .cta{
      position:relative;
      overflow:hidden;
      border-radius:28px;
      background:
        linear-gradient(180deg, rgba(4,10,9,.22), rgba(4,10,9,.82)),
        url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
      border:1px solid var(--line);
      box-shadow:var(--shadow);
    }

    .cta::before{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(120deg, rgba(7,17,15,.88), rgba(7,17,15,.56) 54%, rgba(7,17,15,.82));
    }

    .cta-inner{
      position:relative;
      z-index:1;
      display:grid;
      grid-template-columns: 1.05fr .95fr;
      gap:20px;
      padding:clamp(24px, 5vw, 40px);
      align-items:center;
    }

    .cta h2{
      margin:0;
      font-size:clamp(1.55rem, 3vw, 2.5rem);
      line-height:1.15;
    }

    .cta p{
      margin:14px 0 0;
      max-width:56ch;
      color:rgba(238,245,242,.86);
    }

    .cta-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      justify-content:flex-start;
      align-items:center;
      margin-top:22px;
    }

    .cta-box{
      display:grid;
      gap:12px;
      padding:18px;
      border-radius:20px;
      background:rgba(255,255,255,.06);
      border:1px solid rgba(255,255,255,.12);
    }

    .cta-box .note{
      color:#ecf6f3;
      font-weight:700;
    }

    .cta-box ul{
      margin:0;
      padding:0 0 0 18px;
      color:rgba(238,245,242,.82);
      display:grid;
      gap:8px;
    }

    .footer{
      padding:34px 0 26px;
      border-top:1px solid var(--line);
      margin-top:20px;
      background:rgba(5,12,11,.6);
    }

    .footer-grid{
      display:grid;
      grid-template-columns:1.1fr .8fr 1fr;
      gap:18px;
      align-items:start;
    }

    .footer h3{
      margin:0 0 12px;
      font-size:1rem;
      color:#f2f7f5;
    }

    .footer p,
    .footer a,
    .footer li{
      color:var(--muted);
      font-size:.95rem;
    }

    .footer-links{
      display:grid;
      gap:10px;
    }

    .footer-links a{
      width:max-content;
    }

    .footer-links a:hover,
    .footer-links a:focus-visible{
      color:var(--text);
      transform:translateX(2px);
      outline:none;
    }

    .footer-bottom{
      margin-top:24px;
      padding-top:18px;
      border-top:1px solid var(--line);
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
      color:rgba(170,184,179,.88);
      font-size:.92rem;
    }

    .badge{
      display:inline-flex;
      align-items:center;
      gap:8px;
      min-height:32px;
      padding:0 12px;
      border-radius:999px;
      background:rgba(62,230,178,.10);
      border:1px solid rgba(62,230,178,.18);
      color:#d2fff0;
      font-size:.86rem;
      font-weight:600;
    }

    .badge::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:50%;
      background:var(--brand);
      box-shadow:0 0 0 4px rgba(62,230,178,.12);
    }

    .mobile-only{
      display:none;
    }

    @media (max-width: 1024px){
      .hero-grid,
      .feature-grid,
      .split,
      .cta-inner,
      .footer-grid{
        grid-template-columns:1fr;
      }

      .info-strip{
        grid-template-columns:repeat(2, minmax(0, 1fr));
        margin-top:0;
      }

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

      .hero-panel__media{
        min-height:260px;
      }
    }

    @media (max-width: 768px){
      .header-inner{
        min-height:68px;
      }

      .nav-toggle{
        display:inline-flex;
      }

      .nav{
        position:absolute;
        right:16px;
        top:74px;
        display:none;
        flex-direction:column;
        align-items:stretch;
        width:min(320px, calc(100vw - 32px));
        padding:12px;
        border-radius:20px;
        background:#0b1513;
        border:1px solid var(--line);
        box-shadow:var(--shadow);
      }

      .nav.is-open{
        display:flex;
      }

      .nav a{
        width:100%;
        justify-content:flex-start;
        border-radius:14px;
      }

      .nav a.is-active::after{
        display:none;
      }

      .hero-inner{
        padding-top:48px;
      }

      h1{
        max-width:100%;
      }

      .hero p{
        font-size:1rem;
      }

      .section-head{
        align-items:flex-start;
        flex-direction:column;
      }

      .info-strip{
        grid-template-columns:1fr;
      }

      .feature-hero{
        min-height:320px;
      }

      .mobile-only{
        display:inline-flex;
      }

      .btn{
        width:100%;
      }

      .hero-actions,
      .cta-actions{
        display:grid;
        grid-template-columns:1fr;
      }
    }

    @media (max-width: 520px){
      .container{
        width:min(var(--container), calc(100% - 24px));
      }

      .logo-text span{
        display:none;
      }

      .logo-mark{
        width:34px;
        height:34px;
        border-radius:12px;
      }

      .hero-panel__body,
      .feature-hero__content,
      .mini-card__body,
      .step-card,
      .faq-q,
      .faq-a-inner{
        padding-left:16px;
        padding-right:16px;
      }

      .hero-panel__media{
        min-height:220px;
      }

      .tag,
      .pill{
        font-size:.82rem;
      }

      .footer-bottom{
        flex-direction:column;
      }
    }

    :focus-visible{
      outline:2px solid rgba(62,230,178,.72);
      outline-offset:3px;
    }

/* roulang page: category1 */
:root{
      --bg:#07110f;
      --bg-2:#0c1714;
      --surface:#101c19;
      --surface-2:#14211d;
      --line:rgba(255,255,255,.10);
      --line-2:rgba(255,255,255,.16);
      --text:#edf4f1;
      --muted:#a9b8b2;
      --muted-2:#81938d;
      --accent:#37e1b2;
      --accent-2:#2ac48d;
      --amber:#d7a84d;
      --shadow:0 20px 50px rgba(0,0,0,.30);
      --shadow-soft:0 14px 30px rgba(0,0,0,.20);
      --radius:18px;
      --radius-lg:24px;
      --container:1240px;
      --space:clamp(18px,2.8vw,30px);
      --space-lg:clamp(28px,4vw,48px);
      --transition:180ms ease;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(55,225,178,.10), transparent 28%),
        radial-gradient(circle at right 15%, rgba(215,168,77,.08), transparent 24%),
        linear-gradient(180deg, #07110f 0%, #081412 48%, #050908 100%);
      line-height:1.7;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button,input,textarea{font:inherit}
    ::selection{background:rgba(55,225,178,.28);color:#fff}
    .container{
      width:min(var(--container), calc(100% - 48px));
      margin:0 auto;
    }

    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(7,17,15,.94);
      backdrop-filter:saturate(120%);
      border-bottom:1px solid var(--line);
    }
    .header-inner{
      min-height:80px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
    }
    .logo{
      display:flex;
      align-items:center;
      gap:14px;
      min-width:0;
    }
    .logo-mark{
      display:grid;
      place-items:center;
      width:48px;
      height:48px;
      border-radius:14px;
      background:linear-gradient(145deg, rgba(55,225,178,.18), rgba(55,225,178,.06));
      border:1px solid rgba(55,225,178,.25);
      color:var(--accent);
      font-weight:800;
      letter-spacing:.08em;
      box-shadow:inset 0 1px 0 rgba(255,255,255,.05);
    }
    .logo-text{
      display:flex;
      flex-direction:column;
      gap:2px;
      min-width:0;
    }
    .logo-text strong{
      font-size:1.04rem;
      line-height:1.15;
      white-space:nowrap;
    }
    .logo-text span{
      color:var(--muted);
      font-size:.82rem;
      white-space:nowrap;
    }
    .nav-wrap{
      display:flex;
      align-items:center;
      gap:14px;
    }
    .nav{
      display:flex;
      align-items:center;
      gap:12px;
    }
    .nav a{
      position:relative;
      padding:11px 14px;
      color:var(--muted);
      font-weight:600;
      border-radius:999px;
      transition:color var(--transition), background var(--transition), transform var(--transition);
    }
    .nav a:hover,
    .nav a:focus-visible{
      color:var(--text);
      background:rgba(255,255,255,.04);
      outline:none;
    }
    .nav a.is-active{
      color:var(--text);
      background:rgba(55,225,178,.10);
    }
    .nav a.is-active::after{
      content:"";
      position:absolute;
      left:16px;
      right:16px;
      bottom:6px;
      height:2px;
      border-radius:999px;
      background:linear-gradient(90deg, var(--accent), var(--amber));
    }
    .nav-toggle{
      display:none;
      width:46px;
      height:46px;
      border:1px solid var(--line);
      border-radius:14px;
      background:rgba(255,255,255,.02);
      color:var(--text);
      cursor:pointer;
      transition:transform var(--transition), border-color var(--transition), background var(--transition);
      align-items:center;
      justify-content:center;
    }
    .nav-toggle:hover,
    .nav-toggle:focus-visible{
      transform:translateY(-1px);
      border-color:rgba(55,225,178,.35);
      background:rgba(55,225,178,.06);
      outline:none;
    }
    .nav-toggle span{
      position:relative;
      width:18px;
      height:2px;
      background:currentColor;
      border-radius:99px;
      display:block;
    }
    .nav-toggle span::before,
    .nav-toggle span::after{
      content:"";
      position:absolute;
      left:0;
      width:18px;
      height:2px;
      background:currentColor;
      border-radius:99px;
      transition:transform var(--transition), top var(--transition), opacity var(--transition);
    }
    .nav-toggle span::before{top:-6px}
    .nav-toggle span::after{top:6px}

    main{padding-bottom:36px}
    .page-section{padding-top:28px}
    .section-head{
      display:flex;
      flex-wrap:wrap;
      align-items:flex-end;
      justify-content:space-between;
      gap:14px;
      margin-bottom:18px;
    }
    .section-title{
      margin:0;
      font-size:clamp(1.4rem, 2.6vw, 2rem);
      line-height:1.2;
      letter-spacing:.01em;
    }
    .section-lead{
      margin:0;
      color:var(--muted);
      max-width:68ch;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:8px 12px;
      border-radius:999px;
      background:rgba(55,225,178,.10);
      border:1px solid rgba(55,225,178,.20);
      color:var(--accent);
      font-size:.82rem;
      font-weight:700;
      letter-spacing:.02em;
      white-space:nowrap;
    }
    .badge::before{
      content:"";
      width:7px;
      height:7px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 4px rgba(55,225,178,.12);
    }

    .category-hero{
      position:relative;
      overflow:hidden;
      border-radius:var(--radius-lg);
      margin-top:22px;
      background:
        linear-gradient(180deg, rgba(3,8,7,.22), rgba(3,8,7,.74)),
        url('/assets/images/coverpic/cover-2.webp') center/cover no-repeat;
      border:1px solid rgba(255,255,255,.08);
      box-shadow:var(--shadow);
    }
    .category-hero::before{
      content:"";
      position:absolute;
      inset:0;
      background:linear-gradient(90deg, rgba(5,11,10,.82), rgba(5,11,10,.48) 54%, rgba(5,11,10,.70));
      pointer-events:none;
    }
    .hero-inner{
      position:relative;
      z-index:1;
      padding:clamp(28px,4vw,52px);
      min-height:320px;
      display:flex;
      align-items:flex-end;
    }
    .hero-content{
      max-width:820px;
    }
    .crumbs{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      align-items:center;
      color:rgba(255,255,255,.80);
      font-size:.9rem;
      margin-bottom:14px;
    }
    .crumbs a{
      color:#fff;
      opacity:.88;
    }
    .crumbs span.sep{
      color:rgba(255,255,255,.52);
    }
    .hero-kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.10);
      border:1px solid rgba(255,255,255,.14);
      color:#fff;
      font-size:.82rem;
      font-weight:700;
      margin-bottom:14px;
      backdrop-filter:blur(2px);
    }
    .hero-kicker::before{
      content:"";
      width:8px;
      height:8px;
      border-radius:999px;
      background:var(--accent);
      box-shadow:0 0 0 4px rgba(55,225,178,.16);
    }
    .hero-title{
      margin:0;
      font-size:clamp(2rem, 5vw, 4rem);
      line-height:1.08;
      letter-spacing:-.02em;
      text-wrap:balance;
    }
    .hero-subtitle{
      margin:16px 0 0;
      color:rgba(245,251,248,.90);
      max-width:62ch;
      font-size:1.03rem;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:24px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      min-height:46px;
      padding:0 18px;
      border-radius:14px;
      border:1px solid transparent;
      font-weight:700;
      cursor:pointer;
      transition:transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition), box-shadow var(--transition);
      user-select:none;
    }
    .btn:hover,
    .btn:focus-visible{
      transform:translateY(-2px);
      outline:none;
    }
    .btn-primary{
      background:linear-gradient(135deg, var(--accent), var(--accent-2));
      color:#062019;
      box-shadow:0 16px 28px rgba(55,225,178,.18);
    }
    .btn-primary:hover,
    .btn-primary:focus-visible{
      box-shadow:0 20px 36px rgba(55,225,178,.24);
    }
    .btn-secondary{
      background:rgba(255,255,255,.04);
      border-color:rgba(255,255,255,.16);
      color:var(--text);
    }
    .btn-secondary:hover,
    .btn-secondary:focus-visible{
      border-color:rgba(55,225,178,.34);
      background:rgba(55,225,178,.07);
    }
    .hero-tags{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:18px;
    }
    .hero-tags .tag{
      padding:8px 12px;
      border-radius:999px;
      background:rgba(255,255,255,.08);
      color:#fff;
      border:1px solid rgba(255,255,255,.12);
      font-size:.84rem;
    }

    .quick-grid{
      display:grid;
      grid-template-columns:repeat(4, minmax(0,1fr));
      gap:16px;
      margin-top:22px;
    }
    .quick-card{
      position:relative;
      overflow:hidden;
      padding:20px;
      border-radius:var(--radius);
      background:linear-gradient(180deg, rgba(20,33,29,.96), rgba(12,23,20,.96));
      border:1px solid var(--line);
      box-shadow:var(--shadow-soft);
      transition:transform var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
      min-height:150px;
    }
    .quick-card:hover{
      transform:translateY(-2px);
      border-color:rgba(55,225,178,.22);
      box-shadow:0 22px 40px rgba(0,0,0,.28);
      background:linear-gradient(180deg, rgba(22,38,33,.98), rgba(13,26,22,.98));
    }
    .quick-card .num{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width:34px;
      height:34px;
      border-radius:12px;
      background:rgba(55,225,178,.10);
      color:var(--accent);
      font-weight:800;
      margin-bottom:14px;
    }
    .quick-card h3{
      margin:0 0 10px;
      font-size:1.05rem;
      line-height:1.3;
    }
    .quick-card p{
      margin:0;
      color:var(--muted);
      font-size:.96rem;
    }

    .content-shell{
      display:grid;
      grid-template-columns:minmax(0,1.2fr) minmax(300px,.8fr);
      gap:18px;
      margin-top:18px;
      align-items:start;
    }
    .featured-card{
      overflow:hidden;
      border-radius:var(--radius-lg);
      background:linear-gradient(180deg, rgba(20,33,29,.98), rgba(11,20,17,.98));
      border:1px solid var(--line);
      box-shadow:var(--shadow-soft);
    }
    .featured-media{
      position:relative;
      aspect-ratio:16/9;
      overflow:hidden;
    }
    .featured-media img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:transform .35s ease;
    }
    .featured-card:hover .featured-media img{transform:scale(1.03)}
    .media-badge{
      position:absolute;
      left:16px;
      top:16px;
      padding:7px 11px;
      border-radius:999px;
      background:rgba(8,17,15,.80);
      color:#fff;
      border:1px solid rgba(255,255,255,.12);
      font-size:.82rem;
      font-weight:700;
      backdrop-filter:blur(4px);
    }
    .featured-body{
      padding:22px;
    }
    .featured-body h3{
      margin:0 0 10px;
      font-size:1.45rem;
      line-height:1.25;
    }
    .featured-body p{
      margin:0;
      color:var(--muted);
    }
    .list-inline{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:18px;
      padding:0;
      list-style:none;
    }
    .list-inline li{
      padding:7px 11px;
      border-radius:999px;
      background:rgba(255,255,255,.04);
      border:1px solid var(--line);
      color:#dbe6e2;
      font-size:.84rem;
    }

    .side-stack{
      display:grid;
      gap:16px;
    }
    .mini-card{
      display:grid;
      grid-template-columns:118px minmax(0,1fr);
      gap:14px;
      padding:12px;
      border-radius:var(--radius);
      background:linear-gradient(180deg, rgba(20,33,29,.96), rgba(12,23,20,.96));
      border:1px solid var(--line);
      box-shadow:var(--shadow-soft);
      transition:transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    }
    .mini-card:hover{
      transform:translateY(-2px);
      border-color:rgba(55,225,178,.22);
      box-shadow:0 20px 36px rgba(0,0,0,.25);
    }
    .mini-card img{
      width:100%;
      height:100%;
      aspect-ratio:4/3;
      object-fit:cover;
      border-radius:14px;
    }
    .mini-card h4{
      margin:2px 0 6px;
      font-size:1rem;
      line-height:1.35;
    }
    .mini-card p{
      margin:0;
      color:var(--muted);
      font-size:.93rem;
      line-height:1.65;
    }
    .mini-card .mini-meta{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-top:10px;
      color:var(--accent);
      font-size:.82rem;
      font-weight:700;
    }

    .catalog-grid{
      display:grid;
      grid-template-columns:repeat(3, minmax(0,1fr));
      gap:16px;
      margin-top:18px;
    }
    .catalog-card{
      overflow:hidden;
      border-radius:var(--radius);
      background:linear-gradient(180deg, rgba(20,33,29,.96), rgba(12,23,20,.96));
      border:1px solid var(--line);
      box-shadow:var(--shadow-soft);
      transition:transform var(--transition), border-color var(--transition), box-shadow var(--transition), background var(--transition);
    }
    .catalog-card:hover{
      transform:translateY(-2px);
      border-color:rgba(55,225,178,.22);
      box-shadow:0 22px 42px rgba(0,0,0,.26);
      background:linear-gradient(180deg, rgba(22,38,33,.98), rgba(13,26,22,.98));
    }
    .catalog-card .thumb{
      aspect-ratio:16/10;
      overflow:hidden;
      position:relative;
    }
    .catalog-card .thumb img{
      width:100%;
      height:100%;
      object-fit:cover;
      transition:transform .35s ease;
    }
    .catalog-card:hover .thumb img{transform:scale(1.03)}
    .catalog-card .body{
      padding:18px 18px 20px;
    }
    .catalog-card .chips{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      margin-bottom:12px;
    }
    .chip{
      display:inline-flex;
      align-items:center;
      padding:6px 10px;
      border-radius:999px;
      background:rgba(255,255,255,.04);
      border:1px solid var(--line);
      color:#dbe6e2;
      font-size:.79rem;
      line-height:1;
    }
    .chip.is-accent{
      background:rgba(55,225,178,.13);
      border-color:rgba(55,225,178,.28);
      color:var(--accent);
    }
    .catalog-card h4{
      margin:0 0 8px;
      font-size:1.08rem;
      line-height:1.35;
    }
    .catalog-card p{
      margin:0;
      color:var(--muted);
      font-size:.94rem;
      line-height:1.7;
    }
    .catalog-card .meta{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      margin-top:14px;
      color:var(--muted-2);
      font-size:.82rem;
    }
    .catalog-card .meta strong{
      color:#dbe6e2;
      font-weight:700;
    }

    .section-box{
      margin-top:22px;
      padding:22px;
      border-radius:var(--radius-lg);
      background:linear-gradient(180deg, rgba(17,29,25,.96), rgba(11,20,17,.96));
      border:1px solid var(--line);
      box-shadow:var(--shadow-soft);
    }
    .section-split{
      display:grid;
      grid-template-columns:minmax(0,1fr) minmax(300px,.8fr);
      gap:18px;
      align-items:start;
    }
    .bullet-list{
      margin:0;
      padding:0;
      list-style:none;
      display:grid;
      gap:12px;
    }
    .bullet-list li{
      position:relative;
      padding-left:18px;
      color:#dfe9e5;
    }
    .bullet-list li::before{
      content:"";
      position:absolute;
      left:0;
      top:.78em;
      width:7px;
      height:7px;
      border-radius:50%;
      background:var(--accent);
      box-shadow:0 0 0 4px rgba(55,225,178,.10);
      transform:translateY(-50%);
    }
    .side-note{
      padding:20px;
      border-radius:var(--radius);
      background:rgba(255,255,255,.03);
      border:1px solid var(--line);
    }
    .side-note h3{
      margin:0 0 12px;
      font-size:1.05rem;
    }
    .step-list{
      display:grid;
      gap:12px;
    }
    .step{
      display:flex;
      gap:12px;
      align-items:flex-start;
      padding:12px 0;
      border-top:1px solid rgba(255,255,255,.06);
    }
    .step:first-child{border-top:none;padding-top:0}
    .step-num{
      flex:0 0 auto;
      width:30px;
      height:30px;
      display:grid;
      place-items:center;
      border-radius:10px;
      background:rgba(215,168,77,.12);
      color:var(--amber);
      font-weight:800;
      font-size:.88rem;
    }
    .step h4{
      margin:0 0 4px;
      font-size:.98rem;
    }
    .step p{
      margin:0;
      color:var(--muted);
      font-size:.92rem;
    }

    .faq-list{
      display:grid;
      gap:12px;
      margin-top:18px;
    }
    .faq-item{
      border-radius:16px;
      overflow:hidden;
      background:linear-gradient(180deg, rgba(20,33,29,.96), rgba(12,23,20,.96));
      border:1px solid var(--line);
      box-shadow:var(--shadow-soft);
    }
    .faq-question{
      width:100%;
      border:none;
      background:none;
      color:var(--text);
      cursor:pointer;
      padding:18px 18px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:14px;
      text-align:left;
      transition:background var(--transition);
    }
    .faq-question:hover,
    .faq-question:focus-visible{
      outline:none;
      background:rgba(255,255,255,.03);
    }
    .faq-question span{
      font-weight:700;
      line-height:1.45;
    }
    .faq-icon{
      flex:0 0 auto;
      width:28px;
      height:28px;
      border-radius:999px;
      border:1px solid var(--line-2);
      position:relative;
      background:rgba(255,255,255,.03);
    }
    .faq-icon::before,
    .faq-icon::after{
      content:"";
      position:absolute;
      left:50%;
      top:50%;
      width:12px;
      height:2px;
      margin-left:-6px;
      margin-top:-1px;
      background:var(--text);
      border-radius:99px;
      transition:transform var(--transition), opacity var(--transition);
    }
    .faq-icon::after{
      transform:rotate(90deg);
    }
    .faq-item.is-open .faq-icon::after{opacity:0}
    .faq-answer{
      max-height:0;
      overflow:hidden;
      transition:max-height 220ms ease;
      border-top:1px solid rgba(255,255,255,.06);
      background:rgba(255,255,255,.02);
    }
    .faq-answer p{
      margin:0;
      padding:16px 18px 18px;
      color:var(--muted);
    }

    .cta{
      margin-top:26px;
    }
    .cta-box{
      overflow:hidden;
      border-radius:var(--radius-lg);
      background:
        linear-gradient(135deg, rgba(55,225,178,.15), rgba(215,168,77,.08)),
        linear-gradient(180deg, rgba(20,33,29,.98), rgba(11,20,17,.98));
      border:1px solid rgba(255,255,255,.10);
      box-shadow:var(--shadow);
      padding:clamp(24px,3.5vw,36px);
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
    }
    .cta h2{
      margin:0 0 8px;
      font-size:clamp(1.35rem, 2.5vw, 1.9rem);
      line-height:1.2;
    }
    .cta p{
      margin:0;
      color:#d9e4e0;
      max-width:58ch;
    }
    .cta-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      flex:0 0 auto;
    }

    .footer{
      margin-top:26px;
      border-top:1px solid var(--line);
      background:rgba(7,17,15,.96);
    }
    .footer .container{padding:30px 0 20px}
    .footer-grid{
      display:grid;
      grid-template-columns:1.2fr .8fr 1fr;
      gap:24px;
    }
    .footer h3{
      margin:0 0 12px;
      font-size:1.02rem;
    }
    .footer p{
      margin:0;
      color:var(--muted);
    }
    .footer-links{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .footer-links a{
      padding:10px 12px;
      border-radius:12px;
      border:1px solid var(--line);
      color:#dbe6e2;
      background:rgba(255,255,255,.02);
      transition:background var(--transition), border-color var(--transition), transform var(--transition);
    }
    .footer-links a:hover,
    .footer-links a:focus-visible{
      background:rgba(55,225,178,.08);
      border-color:rgba(55,225,178,.24);
      transform:translateY(-1px);
      outline:none;
    }
    .footer-bottom{
      margin-top:22px;
      padding-top:18px;
      border-top:1px solid var(--line);
      display:flex;
      justify-content:space-between;
      gap:12px;
      flex-wrap:wrap;
      color:var(--muted-2);
      font-size:.92rem;
    }

    .section-spacer{margin-top:16px}

    @media (max-width: 1024px){
      .quick-grid{grid-template-columns:repeat(2, minmax(0,1fr))}
      .content-shell,
      .section-split,
      .footer-grid{
        grid-template-columns:1fr;
      }
      .catalog-grid{grid-template-columns:repeat(2, minmax(0,1fr))}
    }
    @media (max-width: 768px){
      .container{width:min(var(--container), calc(100% - 32px))}
      .nav-toggle{display:inline-flex}
      .nav-wrap{margin-left:auto}
      .nav{
        position:absolute;
        right:24px;
        top:80px;
        width:min(260px, calc(100vw - 48px));
        flex-direction:column;
        align-items:stretch;
        gap:8px;
        padding:12px;
        border-radius:18px;
        border:1px solid var(--line);
        background:rgba(8,18,16,.98);
        box-shadow:var(--shadow);
        display:none;
      }
      .nav-wrap.is-open .nav{display:flex}
      .nav a{justify-content:center}
      .quick-grid,
      .catalog-grid{grid-template-columns:1fr}
      .mini-card{
        grid-template-columns:1fr;
      }
      .hero-inner{
        min-height:300px;
        padding:24px;
      }
      .cta-box{
        flex-direction:column;
        align-items:flex-start;
      }
    }
    @media (max-width: 520px){
      .header-inner{min-height:72px}
      .logo-mark{width:42px;height:42px;border-radius:12px}
      .logo-text strong{font-size:.98rem}
      .logo-text span{font-size:.78rem}
      .hero-title{font-size:1.8rem}
      .hero-subtitle{font-size:.96rem}
      .btn{width:100%}
      .hero-actions{width:100%}
      .hero-actions .btn{flex:1 1 100%}
      .card, .quick-card, .featured-card, .mini-card, .catalog-card, .faq-item, .side-note{border-radius:16px}
      .footer-bottom{font-size:.84rem}
    }