/* roulang page: index */
:root{
      --brand-blue:#2563EB;
      --brand-deep:#1D4ED8;
      --brand-indigo:#4F46E5;
      --accent-sakura:#F4A7B9;
      --accent-amber:#F59E0B;
      --bg-soft:#F7FAFF;
      --bg-lighter:#F9FBFF;
      --text-main:#0F172A;
      --text-muted:#64748B;
      --border-soft:rgba(37,99,235,.12);
      --shadow-card:0 18px 45px rgba(37,99,235,.10);
      --shadow-hover:0 24px 60px rgba(37,99,235,.16);
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:16px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text-main);
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
      line-height:1.75;
      background:
        radial-gradient(circle at 12% 8%, rgba(79,70,229,.10), transparent 28%),
        radial-gradient(circle at 88% 12%, rgba(244,167,185,.18), transparent 24%),
        linear-gradient(180deg,#F7FAFF 0%,#FFFFFF 42%,#F9FBFF 100%);
      overflow-x:hidden;
    }
    body:before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      background-image:
        linear-gradient(rgba(37,99,235,.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37,99,235,.055) 1px, transparent 1px);
      background-size:38px 38px;
      mask-image:linear-gradient(to bottom, rgba(0,0,0,.75), transparent 62%);
      z-index:-1;
    }
    a{color:inherit;text-decoration:none}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    img{max-width:100%;display:block}
    .site-wrap{min-height:100vh}
    .page-container{width:min(1180px, calc(100% - 36px));margin-inline:auto}
    .section{padding:84px 0}
    .section-tight{padding:58px 0}
    .nav-shell{
      position:sticky;
      top:16px;
      z-index:50;
      margin-top:16px;
    }
    .nav-panel{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:12px;
      background:rgba(255,255,255,.88);
      backdrop-filter:blur(18px);
      border:1px solid rgba(37,99,235,.12);
      border-radius:24px;
      box-shadow:0 16px 50px rgba(15,23,42,.08);
    }
    .brand-logo{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:max-content;
      padding:8px 12px 8px 8px;
      border-radius:18px;
      background:linear-gradient(135deg,#FFFFFF,#EFF6FF);
      border:1px solid rgba(37,99,235,.10);
    }
    .brand-mark{
      width:42px;
      height:42px;
      border-radius:16px;
      display:grid;
      place-items:center;
      color:white;
      font-weight:800;
      background:
        radial-gradient(circle at 74% 18%, var(--accent-sakura), transparent 25%),
        linear-gradient(135deg,var(--brand-blue),var(--brand-indigo));
      box-shadow:0 12px 24px rgba(37,99,235,.22);
    }
    .brand-text{font-weight:800;color:#12305f;line-height:1.25;font-size:15px}
    .brand-sub{display:block;font-size:11px;color:#64748B;font-weight:600}
    .nav-links{
      flex:1;
      display:flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      overflow-x:auto;
      scrollbar-width:none;
      padding:2px;
    }
    .nav-links::-webkit-scrollbar{display:none}
    .nav-card{
      display:flex;
      align-items:center;
      gap:8px;
      min-width:max-content;
      padding:10px 12px;
      border-radius:16px;
      background:#FFFFFF;
      border:1px solid rgba(37,99,235,.10);
      color:#334155;
      font-size:14px;
      font-weight:700;
      transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease, background .2s ease;
    }
    .nav-card:hover,.nav-card:focus-visible{
      transform:translateY(-2px);
      border-color:rgba(37,99,235,.32);
      box-shadow:0 10px 24px rgba(37,99,235,.12);
      outline:none;
    }
    .nav-card.active{
      color:var(--brand-deep);
      background:linear-gradient(135deg,#EFF6FF,#FFFFFF);
      border-color:rgba(37,99,235,.28);
    }
    .nav-ico{
      width:26px;
      height:26px;
      border-radius:10px;
      display:grid;
      place-items:center;
      background:#EFF6FF;
      color:var(--brand-blue);
      font-size:13px;
    }
    .nav-cta{
      min-width:max-content;
      padding:12px 16px;
      border-radius:17px;
      background:var(--brand-blue);
      color:#fff;
      font-weight:800;
      box-shadow:0 14px 30px rgba(37,99,235,.22);
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .nav-cta:hover,.nav-cta:focus-visible{
      background:var(--brand-deep);
      transform:translateY(-2px);
      box-shadow:0 18px 38px rgba(37,99,235,.30);
      outline:3px solid rgba(37,99,235,.20);
      outline-offset:2px;
    }
    .hero{
      padding:64px 0 72px;
    }
    .hero-stage{
      position:relative;
      overflow:hidden;
      border-radius:34px;
      border:1px solid rgba(37,99,235,.14);
      background:
        linear-gradient(120deg, rgba(255,255,255,.94), rgba(239,246,255,.86)),
        radial-gradient(circle at 82% 14%, rgba(244,167,185,.26), transparent 28%);
      box-shadow:var(--shadow-card);
    }
    .hero-stage:after{
      content:"";
      position:absolute;
      right:-90px;
      bottom:-120px;
      width:320px;
      height:320px;
      border-radius:50%;
      border:42px solid rgba(37,99,235,.055);
    }
    .hero-inner{
      position:relative;
      z-index:1;
      display:grid;
      grid-template-columns:minmax(0,1.05fr) minmax(360px,.95fr);
      gap:30px;
      padding:44px;
      align-items:stretch;
    }
    .age-note{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:9px 12px;
      border-radius:999px;
      background:#FFFFFF;
      border:1px solid rgba(245,158,11,.26);
      color:#92400E;
      font-size:13px;
      font-weight:800;
      box-shadow:0 10px 24px rgba(245,158,11,.10);
    }
    .eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      color:var(--brand-deep);
      font-weight:800;
      letter-spacing:.02em;
      font-size:14px;
    }
    .eyebrow:before{
      content:"";
      width:10px;height:10px;border-radius:50%;
      background:var(--accent-sakura);
      box-shadow:16px 0 0 var(--accent-amber),32px 0 0 var(--brand-blue);
    }
    h1{
      margin:18px 0 16px;
      font-size:clamp(32px,5vw,52px);
      line-height:1.16;
      letter-spacing:-.04em;
      font-weight:800;
      color:#0B1F45;
    }
    .hero-desc{
      max-width:760px;
      font-size:17px;
      color:#475569;
      line-height:1.85;
    }
    .btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      border-radius:999px;
      padding:13px 19px;
      font-weight:800;
      border:1px solid transparent;
      transition:transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
    }
    .btn-primary{
      color:#fff;
      background:linear-gradient(135deg,var(--brand-blue),var(--brand-indigo));
      box-shadow:0 18px 34px rgba(37,99,235,.24);
    }
    .btn-primary:hover,.btn-primary:focus-visible{
      transform:translateY(-2px);
      box-shadow:0 24px 44px rgba(37,99,235,.32);
      outline:3px solid rgba(37,99,235,.20);
      outline-offset:2px;
    }
    .btn-secondary{
      color:var(--brand-deep);
      background:#fff;
      border-color:rgba(37,99,235,.18);
      box-shadow:0 12px 26px rgba(15,23,42,.06);
    }
    .btn-secondary:hover,.btn-secondary:focus-visible{
      transform:translateY(-2px);
      background:#EFF6FF;
      border-color:rgba(37,99,235,.34);
      outline:3px solid rgba(37,99,235,.16);
      outline-offset:2px;
    }
    .hero-points{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:12px;
      margin-top:26px;
    }
    .point-card{
      padding:15px;
      background:rgba(255,255,255,.78);
      border:1px solid rgba(37,99,235,.10);
      border-radius:18px;
    }
    .point-num{font-size:22px;font-weight:900;color:var(--brand-blue);line-height:1}
    .point-label{font-size:13px;color:#64748B;margin-top:6px}
    .demo-board{
      border-radius:28px;
      padding:18px;
      background:#FFFFFF;
      border:1px solid rgba(37,99,235,.12);
      box-shadow:0 22px 54px rgba(37,99,235,.13);
    }
    .demo-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      padding:6px 4px 16px;
      border-bottom:1px dashed rgba(37,99,235,.20);
    }
    .demo-title{font-weight:900;color:#12305f}
    .demo-badge{
      padding:6px 10px;
      border-radius:999px;
      background:#FFF7ED;
      color:#B45309;
      font-size:12px;
      font-weight:900;
      border:1px solid rgba(245,158,11,.22);
    }
    .matrix{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:12px;
      margin-top:16px;
    }
    .matrix-card{
      position:relative;
      min-height:118px;
      padding:15px;
      border-radius:20px;
      border:1px solid rgba(37,99,235,.12);
      background:linear-gradient(145deg,#F8FBFF,#FFFFFF);
      transition:transform .2s ease, border-color .2s ease, box-shadow .2s ease;
    }
    .matrix-card:hover{transform:translateY(-3px);border-color:rgba(37,99,235,.34);box-shadow:0 14px 28px rgba(37,99,235,.12)}
    .matrix-no{
      width:34px;height:34px;border-radius:14px;
      display:grid;place-items:center;
      background:#EFF6FF;color:var(--brand-blue);
      font-weight:900;
      margin-bottom:14px;
    }
    .matrix-card strong{display:block;font-size:16px;color:#0F2A57}
    .matrix-card span{display:block;margin-top:6px;font-size:13px;color:#64748B;line-height:1.55}
    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:24px;
      margin-bottom:28px;
    }
    .section-kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:7px 10px;
      border-radius:999px;
      color:var(--brand-deep);
      background:#EFF6FF;
      font-size:13px;
      font-weight:900;
      border:1px solid rgba(37,99,235,.12);
    }
    .section-title{
      margin:10px 0 0;
      font-size:clamp(27px,3vw,36px);
      line-height:1.25;
      font-weight:800;
      letter-spacing:-.03em;
      color:#0B1F45;
    }
    .section-desc{
      max-width:660px;
      color:#64748B;
      line-height:1.85;
      font-size:16px;
      margin-top:10px;
    }
    .feature-layout{
      display:grid;
      grid-template-columns:1.1fr .9fr;
      gap:18px;
      align-items:stretch;
    }
    .feature-main,.feature-side,.soft-card{
      background:#fff;
      border:1px solid rgba(37,99,235,.12);
      border-radius:var(--radius-xl);
      box-shadow:var(--shadow-card);
    }
    .feature-main{
      padding:26px;
      position:relative;
      overflow:hidden;
    }
    .feature-main:before{
      content:"";
      position:absolute;
      top:0;left:0;right:0;height:6px;
      background:linear-gradient(90deg,var(--brand-blue),var(--accent-sakura),var(--accent-amber));
    }
    .feature-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
    .tag{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:7px 11px;
      border-radius:999px;
      background:#F8FAFC;
      color:#475569;
      border:1px solid rgba(37,99,235,.10);
      font-size:13px;
      font-weight:800;
    }
    .feature-side{
      padding:20px;
      display:grid;
      gap:12px;
    }
    .mini-feature{
      display:flex;
      gap:12px;
      padding:14px;
      border-radius:20px;
      background:linear-gradient(135deg,#F8FBFF,#FFFFFF);
      border:1px solid rgba(37,99,235,.10);
      transition:transform .2s ease, border-color .2s ease;
    }
    .mini-feature:hover{transform:translateX(3px);border-color:rgba(37,99,235,.28)}
    .mini-icon{
      flex:0 0 42px;
      width:42px;height:42px;border-radius:16px;
      display:grid;place-items:center;
      background:#EFF6FF;
      color:var(--brand-blue);
      font-weight:900;
    }
    .mini-feature h3{font-size:16px;font-weight:900;margin:0;color:#12305f}
    .mini-feature p{font-size:13px;color:#64748B;margin:4px 0 0;line-height:1.6}
    .data-strip{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:14px;
      padding:18px;
      border-radius:30px;
      background:linear-gradient(135deg,#FFFFFF,#EFF6FF);
      border:1px solid rgba(37,99,235,.12);
      box-shadow:var(--shadow-card);
    }
    .data-item{
      padding:18px;
      border-radius:22px;
      background:rgba(255,255,255,.72);
      border:1px solid rgba(37,99,235,.08);
    }
    .data-value{font-size:30px;font-weight:900;color:var(--brand-blue);line-height:1}
    .data-text{margin-top:8px;color:#64748B;font-size:14px;line-height:1.6}
    .timeline{
      position:relative;
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:16px;
      margin-top:20px;
    }
    .timeline:before{
      content:"";
      position:absolute;
      left:8%;
      right:8%;
      top:38px;
      border-top:2px dashed rgba(37,99,235,.25);
    }
    .timeline-card{
      position:relative;
      padding:20px;
      border-radius:24px;
      background:#FFFFFF;
      border:1px solid rgba(37,99,235,.12);
      box-shadow:var(--shadow-card);
      transition:transform .2s ease, border-color .2s ease, box-shadow .2s ease;
    }
    .timeline-card:hover{transform:translateY(-4px);border-color:rgba(37,99,235,.32);box-shadow:var(--shadow-hover)}
    .timeline-node{
      width:42px;height:42px;border-radius:50%;
      display:grid;place-items:center;
      color:#fff;
      background:var(--brand-blue);
      font-weight:900;
      box-shadow:0 12px 24px rgba(37,99,235,.24);
      margin-bottom:18px;
      position:relative;
      z-index:1;
    }
    .timeline-card h3{font-size:17px;font-weight:900;color:#12305f;margin:0}
    .timeline-card p{font-size:14px;color:#64748B;margin:8px 0 12px;line-height:1.7}
    .progress-card{
      padding:24px;
      border-radius:28px;
      background:#fff;
      border:1px solid rgba(37,99,235,.12);
      box-shadow:var(--shadow-card);
    }
    .progress-line{
      height:12px;
      border-radius:999px;
      background:#E2E8F0;
      overflow:hidden;
      margin:18px 0;
    }
    .progress-fill{
      width:72%;
      height:100%;
      border-radius:999px;
      background:linear-gradient(90deg,var(--brand-blue),var(--accent-amber));
    }
    .check-list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px}
    .check-item{
      padding:14px;
      border-radius:18px;
      background:#F8FBFF;
      border:1px solid rgba(37,99,235,.10);
      color:#475569;
      font-size:14px;
    }
    .form-grid{
      display:grid;
      grid-template-columns:.88fr 1.12fr;
      gap:18px;
      align-items:stretch;
    }
    .lead-card{padding:26px;border-radius:30px;background:#fff;border:1px solid rgba(37,99,235,.12);box-shadow:var(--shadow-card)}
    .lead-card h2{font-size:30px;line-height:1.25;font-weight:900;margin:0;color:#0B1F45}
    .lead-card p{color:#64748B;margin:12px 0 0}
    .input-group{display:grid;gap:12px;margin-top:18px}
    .input-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .field{
      width:100%;
      border:1px solid rgba(37,99,235,.16);
      border-radius:16px;
      padding:13px 14px;
      background:#F8FBFF;
      color:#0F172A;
      outline:none;
      transition:border-color .2s ease, box-shadow .2s ease, background .2s ease;
    }
    textarea.field{min-height:116px;resize:vertical}
    .field:focus{
      border-color:rgba(37,99,235,.55);
      background:#fff;
      box-shadow:0 0 0 4px rgba(37,99,235,.12);
    }
    .form-note{font-size:13px;color:#64748B;margin-top:12px}
    .info-layout{
      display:grid;
      grid-template-columns:1.25fr .75fr;
      gap:18px;
    }
    .link-list{
      padding:10px;
      border-radius:30px;
      background:#fff;
      border:1px solid rgba(37,99,235,.12);
      box-shadow:var(--shadow-card);
    }
    .link-item{
      display:grid;
      grid-template-columns:auto 1fr auto;
      gap:14px;
      align-items:center;
      padding:17px;
      border-radius:22px;
      transition:background .2s ease, transform .2s ease;
      border:1px solid transparent;
    }
    .link-item:hover,.link-item:focus-visible{
      background:#F8FBFF;
      transform:translateX(3px);
      border-color:rgba(37,99,235,.14);
      outline:none;
    }
    .link-no{
      width:38px;height:38px;border-radius:14px;
      display:grid;place-items:center;
      background:#EFF6FF;color:var(--brand-blue);
      font-weight:900;
    }
    .link-item h3{margin:0;font-size:16px;font-weight:900;color:#12305f}
    .link-item p{margin:3px 0 0;color:#64748B;font-size:13px;line-height:1.55}
    .arrow{color:var(--brand-blue);font-weight:900}
    .recommend{
      padding:22px;
      border-radius:30px;
      background:linear-gradient(145deg,#EEF6FF,#FFFFFF);
      border:1px solid rgba(37,99,235,.12);
      box-shadow:var(--shadow-card);
    }
    .ticket-grid{
      display:grid;
      grid-template-columns:repeat(3,1fr);
      gap:18px;
    }
    .ticket{
      position:relative;
      padding:24px;
      border-radius:28px;
      background:#FFFFFF;
      border:1px solid rgba(37,99,235,.12);
      box-shadow:var(--shadow-card);
      overflow:hidden;
      transition:transform .2s ease, border-color .2s ease, box-shadow .2s ease;
    }
    .ticket:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:rgba(37,99,235,.30)}
    .ticket.reco{border:2px solid rgba(37,99,235,.55)}
    .ticket:before{
      content:"";
      position:absolute;
      left:0;right:0;top:74px;
      border-top:1px dashed rgba(37,99,235,.22);
    }
    .ticket-code{
      display:flex;
      justify-content:space-between;
      align-items:center;
      margin-bottom:28px;
    }
    .ticket-id{font-weight:900;color:var(--brand-blue)}
    .corner{
      padding:5px 9px;
      border-radius:999px;
      background:#FFF7ED;
      color:#B45309;
      border:1px solid rgba(245,158,11,.24);
      font-size:12px;
      font-weight:900;
    }
    .ticket h3{font-size:21px;font-weight:900;margin:0;color:#0B1F45}
    .ticket p{color:#64748B;margin:10px 0 16px;line-height:1.7}
    .ticket ul{list-style:none;padding:0;margin:0 0 18px;display:grid;gap:8px}
    .ticket li{font-size:14px;color:#475569}
    .ticket li:before{content:"✓";color:var(--brand-blue);font-weight:900;margin-right:8px}
    .privacy-card,.faq-wrap,.cta-banner{
      border-radius:32px;
      border:1px solid rgba(37,99,235,.12);
      background:#fff;
      box-shadow:var(--shadow-card);
    }
    .privacy-card{padding:26px}
    .protect-row{
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:12px;
      margin-top:18px;
    }
    .protect{
      padding:16px;
      border-radius:20px;
      background:#F8FBFF;
      border:1px solid rgba(37,99,235,.10);
    }
    .protect strong{display:block;color:#12305f;font-weight:900;margin-bottom:4px}
    .protect span{font-size:13px;color:#64748B;line-height:1.6}
    .faq-wrap{overflow:hidden}
    .faq-item + .faq-item{border-top:1px solid rgba(37,99,235,.10)}
    .faq-q{
      width:100%;
      padding:20px 22px;
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:16px;
      background:#fff;
      border:0;
      color:#12305f;
      font-weight:900;
      text-align:left;
    }
    .faq-q:hover,.faq-q:focus-visible{background:#F8FBFF;outline:none}
    .faq-a{display:none;padding:0 22px 20px;color:#64748B;line-height:1.8}
    .faq-item.open .faq-a{display:block}
    .faq-item.open .faq-icon{transform:rotate(45deg)}
    .faq-icon{font-size:22px;color:var(--brand-blue);transition:transform .2s ease}
    .cta-banner{
      position:relative;
      overflow:hidden;
      padding:30px;
      background:
        linear-gradient(135deg,#EFF6FF,#FFFFFF 58%,#FFF7ED);
    }
    .cta-banner:after{
      content:"";
      position:absolute;
      right:24px;
      top:24px;
      width:150px;
      height:150px;
      border-radius:50%;
      background:repeating-linear-gradient(45deg, rgba(37,99,235,.10), rgba(37,99,235,.10) 6px, transparent 6px, transparent 14px);
      opacity:.55;
    }
    .cta-inner{
      position:relative;
      z-index:1;
      display:flex;
      justify-content:space-between;
      align-items:center;
      gap:22px;
    }
    footer{
      padding:48px 0 34px;
      background:linear-gradient(180deg,rgba(239,246,255,.2),rgba(239,246,255,.75));
      border-top:1px solid rgba(37,99,235,.10);
    }
    .footer-panel{
      display:grid;
      grid-template-columns:1.15fr .85fr .85fr;
      gap:24px;
      padding:24px;
      border-radius:30px;
      background:#FFFFFF;
      border:1px solid rgba(37,99,235,.12);
      box-shadow:0 16px 40px rgba(37,99,235,.08);
    }
    .footer-title{font-weight:900;color:#12305f;margin-bottom:8px}
    .footer-text,.footer-link,.copyright{color:#64748B;font-size:14px;line-height:1.75}
    .footer-link{display:block;margin:7px 0;transition:color .2s ease, transform .2s ease}
    .footer-link:hover{color:var(--brand-blue);transform:translateX(2px)}
    .copyright{margin-top:18px;text-align:center}
    @media (max-width:1024px){
      .hero-inner,.feature-layout,.form-grid,.info-layout{grid-template-columns:1fr}
      .data-strip,.timeline,.protect-row{grid-template-columns:repeat(2,1fr)}
      .ticket-grid{grid-template-columns:1fr}
      .timeline:before{display:none}
      .footer-panel{grid-template-columns:1fr 1fr}
    }
    @media (max-width:768px){
      .page-container{width:min(100% - 24px,1180px)}
      .section{padding:58px 0}
      .nav-panel{align-items:flex-start;flex-wrap:wrap;border-radius:22px}
      .brand-logo{flex:1}
      .nav-links{order:3;width:100%;justify-content:flex-start}
      .nav-cta{padding:11px 13px}
      .hero{padding:34px 0 56px}
      .hero-inner{padding:24px;grid-template-columns:1fr}
      .hero-points,.matrix,.check-list,.data-strip,.timeline,.protect-row{grid-template-columns:1fr}
      .input-row{grid-template-columns:1fr}
      .section-head{display:block}
      .cta-inner{display:block}
      .cta-inner .btn-row{margin-top:18px}
      .footer-panel{grid-template-columns:1fr}
    }
    @media (max-width:520px){
      h1{font-size:31px}
      .section-title{font-size:26px}
      .btn{width:100%}
      .nav-cta{width:100%;text-align:center}
      .link-item{grid-template-columns:auto 1fr}
      .link-item .arrow{display:none}
      .demo-board,.lead-card,.privacy-card,.cta-banner{border-radius:24px}
    }

/* roulang page: category1 */
:root{
      --brand-blue:#2563EB;
      --brand-blue-dark:#1D4ED8;
      --brand-indigo:#4F46E5;
      --accent-sakura:#F4A7B9;
      --accent-amber:#F59E0B;
      --bg-soft:#F7FAFF;
      --bg-white:#FFFFFF;
      --text-main:#102033;
      --text-muted:#64748B;
      --line-soft:rgba(37,99,235,.12);
      --line-strong:rgba(37,99,235,.22);
      --shadow-card:0 18px 45px rgba(37,99,235,.10);
      --shadow-hover:0 24px 58px rgba(37,99,235,.16);
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:16px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
      color:var(--text-main);
      background:
        radial-gradient(circle at 6% 8%, rgba(79,70,229,.10), transparent 30%),
        radial-gradient(circle at 92% 18%, rgba(244,167,185,.20), transparent 28%),
        linear-gradient(180deg,#F7FAFF 0%,#FFFFFF 44%,#F9FBFF 100%);
      line-height:1.75;
      overflow-x:hidden;
    }
    body:before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      opacity:.52;
      background-image:
        linear-gradient(rgba(37,99,235,.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37,99,235,.055) 1px, transparent 1px);
      background-size:34px 34px;
      mask-image:linear-gradient(to bottom, rgba(0,0,0,.9), transparent 72%);
      z-index:-1;
    }
    a{color:inherit;text-decoration:none}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    :focus-visible{outline:3px solid rgba(245,158,11,.42);outline-offset:4px}
    .page-container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .nav-shell{position:sticky;top:18px;z-index:50;margin-top:18px}
    .nav-panel{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:18px;
      padding:12px;
      border:1px solid var(--line-soft);
      border-radius:24px;
      background:rgba(255,255,255,.88);
      box-shadow:var(--shadow-card);
      backdrop-filter:blur(18px);
    }
    .brand-logo{display:flex;align-items:center;gap:12px;min-width:max-content}
    .brand-mark{
      width:46px;height:46px;border-radius:16px;
      display:grid;place-items:center;
      color:#fff;font-weight:800;
      background:linear-gradient(135deg,var(--brand-blue),var(--brand-indigo));
      box-shadow:0 12px 28px rgba(37,99,235,.24);
      position:relative;
    }
    .brand-mark:after{
      content:"";
      position:absolute;right:-4px;top:6px;
      width:11px;height:11px;border-radius:99px;
      background:var(--accent-amber);
      border:2px solid #fff;
    }
    .brand-text{font-weight:800;color:#102033;line-height:1.18;font-size:15px}
    .brand-sub{display:block;font-size:11px;color:var(--text-muted);font-weight:600;margin-top:3px}
    .nav-links{display:flex;align-items:center;gap:10px;flex:1;justify-content:center}
    .nav-card{
      display:flex;align-items:center;gap:8px;
      min-height:44px;
      padding:9px 13px;
      border:1px solid var(--line-soft);
      border-radius:16px;
      background:#F8FBFF;
      color:#334155;
      font-size:14px;
      font-weight:700;
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease,background .22s ease,color .22s ease;
    }
    .nav-card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:0 12px 26px rgba(37,99,235,.10);background:#fff;color:var(--brand-blue)}
    .nav-card.active{background:linear-gradient(135deg,#EFF6FF,#EEF2FF);border-color:rgba(37,99,235,.28);color:var(--brand-blue)}
    .nav-ico{
      width:24px;height:24px;border-radius:10px;
      display:grid;place-items:center;
      background:#fff;
      color:var(--brand-blue);
      font-size:12px;
      box-shadow:inset 0 0 0 1px rgba(37,99,235,.10);
    }
    .nav-cta{
      padding:12px 18px;
      border-radius:999px;
      background:var(--brand-blue);
      color:white;
      font-weight:800;
      font-size:14px;
      box-shadow:0 14px 30px rgba(37,99,235,.22);
      transition:transform .22s ease,background .22s ease,box-shadow .22s ease;
      white-space:nowrap;
    }
    .nav-cta:hover{background:var(--brand-blue-dark);transform:translateY(-2px);box-shadow:0 18px 40px rgba(37,99,235,.30)}
    main{position:relative}
    .section{padding:84px 0}
    .inner-hero{padding:54px 0 34px}
    .age-strip{
      margin-top:24px;
      border:1px solid rgba(245,158,11,.26);
      background:linear-gradient(90deg,rgba(255,251,235,.96),rgba(255,255,255,.88));
      color:#7C4A03;
      border-radius:18px;
      padding:12px 16px;
      display:flex;
      gap:10px;
      align-items:flex-start;
      font-size:14px;
      box-shadow:0 12px 30px rgba(245,158,11,.08);
    }
    .hero-panel{
      margin-top:22px;
      border:1px solid var(--line-soft);
      border-radius:32px;
      background:linear-gradient(135deg,rgba(255,255,255,.92),rgba(239,246,255,.86));
      box-shadow:var(--shadow-card);
      overflow:hidden;
      position:relative;
    }
    .hero-panel:before{
      content:"";
      position:absolute;right:-90px;top:-110px;width:320px;height:320px;
      border-radius:999px;background:rgba(244,167,185,.22);
    }
    .hero-panel:after{
      content:"";
      position:absolute;left:44px;bottom:36px;width:180px;height:8px;
      border-radius:999px;background:linear-gradient(90deg,var(--brand-blue),rgba(37,99,235,0));
      opacity:.16;
    }
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      border:1px solid rgba(37,99,235,.14);
      background:#fff;
      color:var(--brand-blue);
      padding:7px 12px;
      border-radius:999px;
      font-size:13px;
      font-weight:800;
      box-shadow:0 8px 18px rgba(37,99,235,.08);
    }
    .hero-title{
      font-size:clamp(30px,5vw,50px);
      line-height:1.16;
      letter-spacing:-.03em;
      font-weight:900;
      color:#0F1F35;
      margin-top:18px;
      max-width:760px;
    }
    .hero-desc{font-size:17px;color:#52627A;max-width:720px;margin-top:18px}
    .breadcrumb{display:flex;gap:8px;align-items:center;color:#64748B;font-size:14px;margin-bottom:16px;flex-wrap:wrap}
    .breadcrumb a{color:var(--brand-blue);font-weight:800}
    .btn-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
    .btn-primary,.btn-secondary{
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      min-height:48px;padding:12px 20px;border-radius:999px;
      font-weight:850;transition:transform .22s ease,box-shadow .22s ease,background .22s ease,border-color .22s ease;
    }
    .btn-primary{background:var(--brand-blue);color:#fff;box-shadow:0 16px 34px rgba(37,99,235,.24)}
    .btn-primary:hover{background:var(--brand-blue-dark);transform:translateY(-2px);box-shadow:0 22px 46px rgba(37,99,235,.30)}
    .btn-secondary{background:#fff;color:var(--brand-blue);border:1px solid rgba(37,99,235,.18)}
    .btn-secondary:hover{background:#EFF6FF;transform:translateY(-2px);box-shadow:0 14px 30px rgba(37,99,235,.10)}
    .filter-board{
      border:1px solid rgba(37,99,235,.14);
      border-radius:26px;
      background:#fff;
      padding:20px;
      box-shadow:0 18px 40px rgba(37,99,235,.11);
      position:relative;
      z-index:1;
    }
    .board-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}
    .board-title{font-weight:900;color:#102033}
    .board-code{font-size:12px;color:#fff;background:var(--accent-amber);border-radius:999px;padding:5px 10px;font-weight:900}
    .filter-row{padding:14px 0;border-top:1px dashed rgba(37,99,235,.15)}
    .filter-label{font-size:13px;color:#64748B;font-weight:800;margin-bottom:10px}
    .tag-list{display:flex;flex-wrap:wrap;gap:8px}
    .filter-tag,.soft-tag{
      display:inline-flex;align-items:center;gap:6px;
      padding:8px 11px;border-radius:999px;
      border:1px solid rgba(37,99,235,.13);
      background:#F8FBFF;
      color:#334155;
      font-size:13px;font-weight:750;
      transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
    }
    .filter-tag:hover,.soft-tag:hover{transform:translateY(-1px);border-color:rgba(37,99,235,.28);background:#fff;color:var(--brand-blue)}
    .filter-tag.active{background:var(--brand-blue);color:#fff;border-color:var(--brand-blue)}
    .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px}
    .section-kicker{color:var(--brand-blue);font-weight:900;font-size:13px;letter-spacing:.08em;margin-bottom:8px}
    h2{font-size:clamp(26px,3vw,36px);line-height:1.22;font-weight:900;color:#102033;margin:0}
    .section-summary{max-width:520px;color:#64748B}
    .tabs{
      display:flex;gap:10px;overflow-x:auto;padding:8px;
      border:1px solid var(--line-soft);
      border-radius:20px;
      background:rgba(255,255,255,.78);
      box-shadow:0 12px 30px rgba(37,99,235,.07);
    }
    .tab{
      white-space:nowrap;border:1px solid rgba(37,99,235,.13);
      background:#fff;color:#475569;
      border-radius:999px;padding:10px 14px;
      font-weight:850;font-size:14px;
      transition:all .2s ease;
    }
    .tab.active,.tab:hover{background:var(--brand-blue);border-color:var(--brand-blue);color:#fff}
    .group-card,.info-card,.guide-card,.step-card,.faq-item,.cta-panel,.explain-card{
      border:1px solid var(--line-soft);
      background:rgba(255,255,255,.92);
      border-radius:var(--radius-xl);
      box-shadow:var(--shadow-card);
      transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
    }
    .group-card:hover,.info-card:hover,.guide-card:hover,.step-card:hover,.explain-card:hover{
      transform:translateY(-3px);box-shadow:var(--shadow-hover);border-color:rgba(37,99,235,.24);
    }
    .group-card{padding:22px;position:relative;overflow:hidden}
    .group-card:before{
      content:"";
      position:absolute;left:0;top:0;bottom:0;width:6px;
      background:linear-gradient(180deg,var(--brand-blue),var(--accent-sakura));
    }
    .group-title{font-size:19px;font-weight:900;margin-bottom:8px;color:#102033}
    .group-desc{color:#64748B;font-size:15px}
    .info-card{padding:20px;overflow:hidden;position:relative}
    .info-card:before{
      content:attr(data-no);
      position:absolute;right:18px;top:12px;
      font-size:42px;font-weight:900;color:rgba(37,99,235,.08);
      line-height:1;
    }
    .abstract-cover{
      height:104px;border-radius:22px;margin-bottom:16px;
      background:
        radial-gradient(circle at 20% 30%, rgba(245,158,11,.45), transparent 18%),
        radial-gradient(circle at 78% 38%, rgba(244,167,185,.46), transparent 20%),
        linear-gradient(135deg,#DBEAFE,#EEF2FF 58%,#FFFFFF);
      border:1px solid rgba(37,99,235,.10);
      position:relative;overflow:hidden;
    }
    .abstract-cover:after{
      content:"";
      position:absolute;inset:18px;
      border:1px dashed rgba(37,99,235,.24);
      border-radius:18px;
    }
    .card-title{font-size:19px;font-weight:900;color:#102033;margin-bottom:8px}
    .card-text{color:#64748B;font-size:15px}
    .read-link{
      margin-top:16px;display:inline-flex;align-items:center;gap:6px;
      color:var(--brand-blue);font-weight:900;font-size:14px;
    }
    .read-link:hover{color:var(--brand-blue-dark)}
    .guide-card{padding:24px}
    .guide-icon{
      width:48px;height:48px;border-radius:18px;
      display:grid;place-items:center;margin-bottom:14px;
      background:linear-gradient(135deg,#EFF6FF,#EEF2FF);
      color:var(--brand-blue);font-weight:900;
      border:1px solid rgba(37,99,235,.12);
    }
    .timeline{position:relative}
    .timeline:before{
      content:"";
      position:absolute;left:26px;top:10px;bottom:10px;
      border-left:2px dashed rgba(37,99,235,.20);
    }
    .step-card{padding:20px 20px 20px 72px;position:relative;margin-bottom:16px}
    .step-no{
      position:absolute;left:15px;top:20px;
      width:28px;height:28px;border-radius:999px;
      display:grid;place-items:center;
      background:var(--brand-blue);color:#fff;
      font-size:12px;font-weight:900;
      box-shadow:0 8px 20px rgba(37,99,235,.22);
    }
    .step-card h3{font-size:18px;font-weight:900;margin-bottom:6px;color:#102033}
    .step-card p{color:#64748B;margin:0}
    .explain-card{padding:30px;position:relative;overflow:hidden}
    .explain-card:after{
      content:"";
      position:absolute;right:-60px;bottom:-80px;width:220px;height:220px;border-radius:999px;
      background:rgba(37,99,235,.08);
    }
    .check-list{display:grid;gap:12px;margin-top:18px}
    .check-item{display:flex;gap:10px;align-items:flex-start;color:#475569}
    .check-dot{
      width:22px;height:22px;flex:0 0 auto;border-radius:999px;
      display:grid;place-items:center;
      background:#EFF6FF;color:var(--brand-blue);
      font-weight:900;font-size:12px;
      margin-top:3px;
    }
    .faq-list{display:grid;gap:14px}
    .faq-item{overflow:hidden}
    .faq-question{
      width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
      padding:20px 22px;border:0;background:#fff;
      color:#102033;text-align:left;font-weight:900;
    }
    .faq-toggle{
      width:30px;height:30px;border-radius:999px;
      display:grid;place-items:center;
      background:#EFF6FF;color:var(--brand-blue);
      flex:0 0 auto;transition:transform .22s ease,background .22s ease,color .22s ease;
    }
    .faq-answer{
      max-height:0;overflow:hidden;
      transition:max-height .28s ease;
      color:#64748B;
      padding:0 22px;
    }
    .faq-item.open{border-color:rgba(37,99,235,.25)}
    .faq-item.open .faq-toggle{transform:rotate(45deg);background:var(--brand-blue);color:#fff}
    .faq-item.open .faq-answer{max-height:180px;padding-bottom:20px}
    .cta-panel{
      padding:34px;
      background:
        radial-gradient(circle at 82% 20%, rgba(244,167,185,.24), transparent 26%),
        linear-gradient(135deg,#EFF6FF,#FFFFFF 60%,#F8FBFF);
      overflow:hidden;
      position:relative;
    }
    .cta-panel:before{
      content:"";
      position:absolute;right:34px;top:28px;width:120px;height:120px;border-radius:34px;
      border:1px dashed rgba(37,99,235,.22);
      transform:rotate(8deg);
    }
    footer{padding:30px 0 46px}
    .footer-panel{
      display:grid;
      grid-template-columns:1.4fr .65fr .95fr;
      gap:28px;
      padding:28px;
      border-radius:28px;
      background:rgba(255,255,255,.90);
      border:1px solid var(--line-soft);
      box-shadow:var(--shadow-card);
    }
    .footer-title{font-weight:900;color:#102033;margin-bottom:12px}
    .footer-link{display:block;color:#475569;font-weight:750;margin:8px 0;transition:color .2s ease,transform .2s ease}
    .footer-link:hover{color:var(--brand-blue);transform:translateX(3px)}
    .footer-text{color:#64748B;font-size:14px}
    .copyright{text-align:center;color:#64748B;font-size:13px;margin-top:18px}
    @media (max-width:1024px){
      .nav-panel{align-items:flex-start;flex-wrap:wrap}
      .nav-links{order:3;width:100%;justify-content:flex-start;overflow-x:auto;padding-top:4px}
      .footer-panel{grid-template-columns:1fr 1fr}
    }
    @media (max-width:768px){
      .page-container{width:min(100% - 28px,1180px)}
      .nav-shell{top:10px;margin-top:10px}
      .nav-panel{border-radius:20px;padding:10px}
      .brand-mark{width:42px;height:42px}
      .brand-text{font-size:14px}
      .nav-cta{padding:10px 14px;font-size:13px}
      .section{padding:58px 0}
      .inner-hero{padding:34px 0 24px}
      .hero-panel{border-radius:24px}
      .section-head{display:block}
      .section-summary{margin-top:12px}
      .footer-panel{grid-template-columns:1fr}
      .cta-panel{padding:24px}
      .age-strip{font-size:13px}
    }
    @media (max-width:520px){
      .nav-panel{gap:10px}
      .brand-logo{width:100%}
      .nav-cta{width:100%;justify-content:center;text-align:center}
      .nav-card{min-width:136px;justify-content:center}
      .btn-row{display:grid}
      .btn-primary,.btn-secondary{width:100%}
      .filter-board{padding:16px;border-radius:22px}
      .hero-title{letter-spacing:-.02em}
      .footer-panel{padding:22px}
    }