:root{
      --bg:#f5f7fb;
      --surface:#ffffff;
      --surface-soft:#f8fafc;
      --line:#e5e7eb;
      --line-strong:#cbd5e1;
      --text:#111827;
      --text-soft:#475569;
      --text-faint:#64748b;
      --dark:#0f172a;
      --shadow-sm:0 8px 24px rgba(15,23,42,.04);
      --shadow-md:0 20px 48px rgba(15,23,42,.08);
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:18px;
      --radius-sm:14px;
      --container:min(1180px, calc(100% - 32px));
      --guide-container:min(920px, calc(100% - 32px));
    }

    *{box-sizing:border-box}
    html,body{margin:0;padding:0;overflow-x:hidden}
    body{
      background:var(--bg);
      color:var(--text);
      font-family:"Inter","Segoe UI","Arial","Noto Sans",system-ui,-apple-system,sans-serif;
      line-height:1.7;
      padding-bottom:calc(76px + env(safe-area-inset-bottom, 0px));
      word-break:keep-all;
    }

    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button{font:inherit}

    .container{width:var(--container);margin:0 auto;min-width:0}
    .guide-container{width:var(--guide-container);margin:0 auto;min-width:0}

    .skip-link{
      position:absolute;
      left:12px;
      top:-44px;
      z-index:3000;
      background:#111827;
      color:#fff;
      padding:10px 14px;
      border-radius:10px;
      font-weight:800;
    }
    .skip-link:focus{top:12px}

    .site-header{
      position:sticky;
      top:0;
      z-index:1500;
      background:rgba(255,255,255,.92);
      backdrop-filter:saturate(160%) blur(12px);
      border-bottom:1px solid rgba(15,23,42,.06);
    }

    .nav-bar{
      min-height:68px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
    }

    .nav-left{
      display:flex;
      align-items:center;
      gap:20px;
      min-width:0;
      flex:1 1 auto;
    }

    .brand{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:0;
      color:#111827;
    }

    .brand-logo{
      width:30px;
      height:30px;
      border-radius:9px;
      flex:0 0 auto;
      background:#e5e7eb;
      object-fit:cover;
    }

    .brand-text{
      display:flex;
      flex-direction:column;
      gap:2px;
      min-width:0;
      line-height:1.1;
    }

    .brand-title{
      font-size:16px;
      font-weight:900;
      white-space:nowrap;
    }

    .brand-sub{
      font-size:12px;
      color:#6b7280;
      white-space:nowrap;
    }

    .nav{
      display:flex;
      align-items:center;
      gap:4px;
      min-width:0;
      flex-wrap:wrap;
    }

    .nav a{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:40px;
      padding:0 12px;
      border-radius:999px;
      color:#475569;
      font-size:14px;
      font-weight:800;
      white-space:nowrap;
    }

    .nav a:hover,
    .nav a:focus,
    .nav a[aria-current="page"]{
      background:#eef2f7;
      color:#111827;
      outline:none;
    }

    .nav-right{
      display:flex;
      align-items:center;
      gap:10px;
      flex:0 0 auto;
    }

    .lang-pills{
      display:flex;
      align-items:center;
      gap:8px;
      flex-wrap:wrap;
    }

    .lang-pill{
      appearance:none;
      border:1px solid var(--line);
      background:#fff;
      color:#6b7280;
      padding:8px 10px;
      border-radius:999px;
      font:13px/1.1 system-ui,-apple-system,Segoe UI,Roboto,"Noto Sans",Arial;
      cursor:pointer;
      white-space:nowrap;
      user-select:none;
    }

    .lang-pill:hover{color:#111827}
    .lang-pill[aria-current="true"]{
      color:#111827;
      font-weight:900;
      border-color:var(--line-strong);
      background:#f8fafc;
    }

    .hamburger{
      display:none;
      appearance:none;
      border:1px solid var(--line);
      background:#fff;
      color:#111827;
      width:42px;
      height:42px;
      border-radius:12px;
      font-size:20px;
      cursor:pointer;
      flex:0 0 auto;
    }

    .countdown-bar-wrap{
      background:#fff;
      border-bottom:1px solid rgba(15,23,42,.06);
    }

    .countdown-bar{
      min-height:52px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      padding:10px 0;
    }

    .countdown-bar__left{
      min-width:0;
      display:flex;
      align-items:center;
      gap:10px;
      flex:1 1 auto;
    }

    .countdown-badge{
      flex:0 0 auto;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:28px;
      padding:0 10px;
      border-radius:999px;
      background:#111827;
      color:#fff;
      font-size:12px;
      font-weight:900;
    }

    .countdown-copy{
      min-width:0;
      font-size:14px;
      color:#334155;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }

    .countdown-copy strong{
      color:#111827;
      font-weight:900;
    }

    .countdown-bar__actions{
      flex:0 0 auto;
      display:flex;
      align-items:center;
      gap:8px;
      flex-wrap:nowrap;
    }

    .countdown-link{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:34px;
      padding:0 12px;
      border-radius:999px;
      border:1px solid var(--line);
      background:#f8fafc;
      font-size:13px;
      font-weight:800;
      color:#111827;
      white-space:nowrap;
      flex:0 0 auto;
    }

    .countdown-link:hover,
    .countdown-link:focus{
      background:#eef2f7;
      outline:none;
    }

    .backdrop{
      position:fixed;
      inset:0;
      background:rgba(15,23,42,.38);
      z-index:1600;
    }

    .drawer{
      position:fixed;
      top:0;
      right:0;
      bottom:0;
      width:min(78vw,360px);
      background:#fff;
      box-shadow:-16px 0 40px rgba(15,23,42,.15);
      z-index:1700;
      overflow-y:auto;
      transform:translateX(100%);
      transition:transform .25s ease;
    }

    html.is-open .drawer{transform:translateX(0)}

    .drawer header{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:16px;
      border-bottom:1px solid var(--line);
      position:sticky;
      top:0;
      background:#fff;
      z-index:2;
    }

    .drawer .section{padding:16px}
    .drawer .nav-list{display:flex;flex-direction:column;gap:4px}
    .drawer .nav-list a{
      display:flex;
      align-items:center;
      justify-content:center;
      width:100%;
      min-height:44px;
      padding:0 12px;
      border-radius:12px;
      font-weight:800;
      color:#111827;
      background:#f8fafc;
    }

    .lang-pills--drawer{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:8px;
    }

    .lang-pills--drawer .lang-pill{
      width:100%;
      display:flex;
      justify-content:center;
    }

    .drawer-dotrule{
      width:calc(100% - 32px);
      margin:0 auto;
      border-top:1px dashed rgba(15,23,42,.16);
    }

    .drawer-quick-stack{
      display:flex;
      flex-direction:column;
      gap:10px;
      margin-top:14px;
    }

    .drawer-quick-pill{
      display:flex;
      align-items:center;
      justify-content:center;
      min-height:44px;
      border:1px solid #dbe2ea;
      border-radius:999px;
      font-weight:800;
      background:#fff;
    }

    .page-main{
      padding:28px 0 48px;
    }

    .breadcrumb{
      display:flex;
      flex-wrap:wrap;
      gap:8px;
      align-items:center;
      margin-bottom:18px;
      color:var(--text-faint);
      font-size:13px;
      font-weight:700;
    }

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

    .guide-hero{
      background:linear-gradient(180deg,#ffffff 0%, #f8fafc 100%);
      border:1px solid var(--line);
      border-radius:var(--radius-xl);
      box-shadow:var(--shadow-md);
      padding:28px;
    }

    .guide-hero__eyebrow{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:30px;
      padding:0 12px;
      border-radius:999px;
      background:#111827;
      color:#fff;
      font-size:12px;
      font-weight:900;
      letter-spacing:.02em;
    }

    .guide-hero h1{
      margin:14px 0 10px;
      font-size:38px;
      line-height:1.16;
      letter-spacing:-.03em;
    }

    .guide-hero__desc{
      margin:0;
      color:var(--text-soft);
      font-size:17px;
    }

    .guide-meta{
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      margin-top:18px;
    }

    .guide-meta__item{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:36px;
      padding:0 12px;
      border:1px solid var(--line);
      border-radius:999px;
      background:#fff;
      color:#334155;
      font-size:13px;
      font-weight:800;
    }

    .guide-video-section{
      margin:24px 0 0;
    }

    .guide-video-wrap{
      position:relative;
      width:100%;
      overflow:hidden;
      border-radius:24px;
      background:#000;
      box-shadow:0 14px 34px rgba(15,23,42,.12);
    }

    .guide-video-wrap iframe{
      width:100%;
      height:100%;
      border:0;
      display:block;
    }

    .guide-video-wrap--shorts{
      max-width:420px;
      aspect-ratio:9 / 16;
      margin:0 auto;
    }

    .guide-video-link{
      margin:12px 0 0;
      text-align:center;
      font-size:14px;
      color:var(--text-faint);
    }

    .guide-video-link a{
      color:var(--text);
      font-weight:800;
    }

    .guide-grid{
      display:grid;
      grid-template-columns:minmax(0,1fr) 280px;
      gap:20px;
      margin-top:22px;
      align-items:start;
    }

    .guide-article{
      display:flex;
      flex-direction:column;
      gap:18px;
      min-width:0;
    }

    .card{
      background:var(--surface);
      border:1px solid var(--line);
      border-radius:var(--radius-xl);
      box-shadow:var(--shadow-sm);
      padding:24px;
    }

    .toc-card{
      position:sticky;
      top:92px;
    }

    .toc-title{
      margin:0 0 14px;
      font-size:18px;
      font-weight:900;
      letter-spacing:-.02em;
    }

    .toc-list{
      display:flex;
      flex-direction:column;
      gap:8px;
    }

    .toc-list a{
      display:block;
      padding:10px 12px;
      border-radius:12px;
      background:#f8fafc;
      border:1px solid #eef2f7;
      color:#334155;
      font-size:14px;
      font-weight:800;
    }

    .toc-list a:hover{
      background:#eef2f7;
      color:#111827;
    }

    .summary-box{
      background:#f8fafc;
      border:1px solid #e2e8f0;
      border-radius:18px;
      padding:18px;
    }

    .summary-box h2,
    .section-card h2{
      margin:0 0 14px;
      font-size:24px;
      line-height:1.2;
      letter-spacing:-.02em;
    }

    .summary-list,
    .tips-list,
    .phase-list,
    .role-list,
    .win-list,
    .condition-list{
      margin:0;
      padding-left:20px;
    }

    .summary-list li,
    .tips-list li,
    .phase-list li,
    .role-list li,
    .win-list li,
    .condition-list li{
      margin:8px 0;
    }

    .section-card h3{
      margin:18px 0 10px;
      font-size:18px;
      line-height:1.35;
      letter-spacing:-.02em;
    }

    .section-card p{
      margin:0 0 12px;
      color:#334155;
    }

    .building-grid{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:12px;
      margin-top:14px;
    }

    .building-item{
      border:1px solid #e2e8f0;
      background:#f8fafc;
      border-radius:18px;
      padding:16px;
    }

    .building-item strong{
      display:block;
      margin-bottom:8px;
      font-size:16px;
      color:#111827;
    }

    .phase-block{
      border:1px solid #e2e8f0;
      background:#f8fafc;
      border-radius:18px;
      padding:18px;
    }

    .phase-block + .phase-block{
      margin-top:14px;
    }

    .phase-label{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:30px;
      padding:0 12px;
      border-radius:999px;
      background:#111827;
      color:#fff;
      font-size:12px;
      font-weight:900;
      margin-bottom:12px;
    }

    .note-box{
      margin-top:14px;
      padding:16px;
      border-radius:18px;
      background:#fff7ed;
      border:1px solid #fed7aa;
      color:#7c2d12;
      font-size:14px;
      font-weight:700;
    }

    .source-note{
      margin-top:12px;
      font-size:13px;
      color:var(--text-faint);
    }

    .source-note strong{
      color:var(--text);
    }

    .cta-card{
      text-align:center;
      background:linear-gradient(180deg,#ffffff 0%, #f8fafc 100%);
    }

    .cta-card h2{
      margin:0 0 10px;
      font-size:26px;
      line-height:1.2;
      letter-spacing:-.02em;
    }

    .cta-card p{
      margin:0;
      color:var(--text-soft);
    }

    .site-footer{
      margin-top:26px;
      border-top:1px solid var(--line);
      background:#fff;
    }

    .footer-link-strip{
      padding:14px 0;
      border-bottom:1px solid #eef2f7;
    }

    .footer-link-strip__inner{
      display:flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      flex-wrap:wrap;
      text-align:center;
    }

    .footer-link-strip__actions{
      display:flex;
      align-items:center;
      justify-content:center;
      gap:8px;
      flex-wrap:wrap;
    }

    .footer-inner{padding:24px 0 34px}
    .footer-top{
      display:flex;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      gap:18px;
      text-align:center;
    }

    .footer-brand{
      font-size:18px;
      font-weight:900;
      color:#111827;
    }

    .footer-desc{
      margin:8px 0 0;
      color:var(--text-faint);
      font-size:14px;
      max-width:720px;
    }

    .footer-links{
      display:flex;
      flex-wrap:wrap;
      justify-content:center;
      gap:10px;
    }

    .footer-links a{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:40px;
      padding:0 14px;
      border-radius:999px;
      border:1px solid var(--line);
      background:#f8fafc;
      font-size:14px;
      font-weight:800;
    }

    .footer-copy{
      margin-top:18px;
      padding-top:18px;
      border-top:1px solid #eef2f7;
      color:var(--text-faint);
      font-size:13px;
      text-align:center;
    }

    .mobile-bottom-nav{
      position:fixed;
      left:0;
      right:0;
      bottom:0;
      z-index:1400;
      display:none;
      background:rgba(255,255,255,.96);
      backdrop-filter:saturate(160%) blur(10px);
      border-top:1px solid rgba(15,23,42,.08);
      padding:8px 10px calc(8px + env(safe-area-inset-bottom, 0px));
    }

    .mobile-bottom-nav__inner{
      display:grid;
      grid-template-columns:repeat(4,minmax(0,1fr));
      gap:6px;
      max-width:640px;
      margin:0 auto;
    }

    .mobile-bottom-nav__item{
      min-width:0;
      display:flex;
      flex-direction:column;
      align-items:center;
      justify-content:center;
      gap:4px;
      padding:8px 4px 7px;
      border-radius:12px;
      color:#6b7280;
    }

    .mobile-bottom-nav__item svg{
      width:20px;
      height:20px;
      display:block;
      flex:0 0 auto;
    }

    .mobile-bottom-nav__label{
      font-size:11px;
      line-height:1.1;
      font-weight:700;
      letter-spacing:-0.01em;
      white-space:nowrap;
    }

    .mobile-bottom-nav__item.is-active,
    .mobile-bottom-nav__item[aria-current="page"]{
      color:#111827;
      background:#f3f4f6;
    }

    @media (max-width:980px){
      .nav{display:none}
      .hamburger{display:inline-flex;align-items:center;justify-content:center}
      .nav-right{display:none}
      .mobile-bottom-nav{display:block}
      .guide-grid{
        grid-template-columns:minmax(0,1fr);
      }
      .toc-card{
        position:static;
      }
      .countdown-bar{
        min-height:52px;
        align-items:center;
        flex-direction:row;
        justify-content:space-between;
        gap:10px;
      }
      .countdown-bar__left{
        width:auto;
        min-width:0;
        flex:1 1 auto;
      }
      .countdown-bar__actions{
        width:auto;
        justify-content:flex-end;
        flex-wrap:nowrap;
      }
    }

    @media (max-width:720px){
      .page-main{
        padding:22px 0 42px;
      }
      .guide-hero,
      .card{
        padding:20px 18px;
        border-radius:22px;
      }
      .guide-hero h1{
        font-size:30px;
      }
      .guide-hero__desc{
        font-size:15px;
      }
      .building-grid{
        grid-template-columns:1fr;
      }
      .guide-video-wrap--shorts{
        max-width:100%;
      }
    }

    @media (max-width:640px){
      .container,
      .guide-container{
        width:min(100% - 24px,1180px);
      }
      .brand-title{font-size:14px}
      .brand-sub{display:none}
      .countdown-bar{
        gap:8px;
      }
      .countdown-bar__left{
        gap:8px;
      }
      .countdown-copy{
        font-size:13px;
        white-space:nowrap;
        overflow:hidden;
        text-overflow:ellipsis;
      }
      .countdown-link{
        min-height:32px;
        padding:0 10px;
        font-size:12px;
      }
      .footer-link-strip__inner{
        flex-direction:column;
      }
    }

    html.is-open body,
    body.no-scroll{overflow:hidden}