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

    :root {
      --bg:       #0b0f1c;
      --fg:       #f0f4f8;
      --card:     #0f1525;
      --border:   #1c2636;
      --primary:  #f5a620;
      --primary-fg: #0b0f1c;
      --muted:    #8395a4;
      --amber:    #fbbf24;
    }

    html { scroll-behavior: smooth; }

    body {
      font-family: 'Noto Sans TC', sans-serif;
      background-color: var(--bg);
      color: var(--fg);
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      background-image:
        radial-gradient(circle at top right, rgba(67,150,255,.05), transparent 40%),
        radial-gradient(circle at bottom left, rgba(245,158,11,.03), transparent 40%);
    }

    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; display: block; }
    hr { border: none; border-top: 1px solid rgba(255,255,255,.05); }

    h1 { font-size: clamp(1.85rem, 5vw, 3rem); font-weight: 700; line-height: 1.15; letter-spacing: -.02em; }
    h2 { font-size: clamp(1.3rem, 3vw, 1.75rem); font-weight: 700; line-height: 1.3; }
    h3 { font-size: 1.05rem; font-weight: 700; line-height: 1.4; }

    .container   { max-width: 72rem; margin: 0 auto; padding: 0 1.25rem; }
    .container-sm{ max-width: 48rem; margin: 0 auto; padding: 0 1.25rem; }
    .container-md{ max-width: 60rem; margin: 0 auto; padding: 0 1.25rem; }

    #navbar {
      position: fixed; top: 0; left: 0; right: 0; z-index: 50;
      background: rgba(11,15,28,.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
      box-shadow: 0 4px 24px rgba(0,0,0,.3);
    }
    .nav-inner {
      display: flex; align-items: center; justify-content: space-between;
      height: 5rem; max-width: 90rem; margin: 0 auto; padding: 0 1.25rem;
    }
    .nav-logo { display: flex; align-items: center; gap: .75rem; }
    .nav-logo-icon {
      width: 2.5rem; height: 2.5rem; border-radius: .75rem;
      background: linear-gradient(135deg, var(--primary), #d97706);
      display: flex; align-items: center; justify-content: center;
      box-shadow: 0 4px 12px rgba(245,166,32,.3); flex-shrink: 0;
    }
    .nav-logo-text { font-family: 'Outfit', sans-serif; font-size: 1.125rem; font-weight: 700; }
    .nav-logo-text span { color: var(--primary); }

    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
      padding: .875rem 2rem; border-radius: .75rem; font-size: 1rem;
      font-weight: 600; cursor: pointer; transition: all .2s; border: none;
      text-decoration: none; white-space: nowrap;
    }
    .btn-primary { background: var(--primary); color: var(--primary-fg); box-shadow: 0 4px 16px rgba(245,166,32,.25); }
    .btn-primary:hover { background: #e09510; transform: translateY(-1px); }
    .btn-outline { background: rgba(255,255,255,.05); color: var(--fg); border: 1px solid rgba(255,255,255,.15); font-weight: 500; }
    .btn-outline:hover { background: rgba(255,255,255,.1); }
    .btn-sm { padding: .5rem 1rem; font-size: .875rem; border-radius: .5rem; }
    .btn-row { display: flex; flex-wrap: wrap; gap: 1rem; }

    .article-hero { padding-top: 8rem; padding-bottom: 3rem; border-bottom: 1px solid var(--border); }
    .breadcrumb { display: flex; align-items: center; gap: .5rem; font-size: .8125rem; color: var(--muted); margin-bottom: 1.5rem; }
    .breadcrumb a:hover { color: var(--primary); }
    .breadcrumb-sep { opacity: .4; }
    .article-badge {
      display: inline-flex; align-items: center; gap: .5rem;
      padding: .3rem .875rem; border-radius: 9999px;
      background: rgba(245,166,32,.1); border: 1px solid rgba(245,166,32,.2);
      color: var(--primary); font-size: .8125rem; font-weight: 600; margin-bottom: 1.5rem;
    }
    .article-meta { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-top: 1.75rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }
    .article-meta-author { display: flex; align-items: center; gap: .625rem; }
    .author-avatar { width: 2.5rem; height: 2.5rem; border-radius: 9999px; overflow: hidden; border: 2px solid rgba(245,166,32,.3); flex-shrink: 0; }
    .author-avatar img { width: 100%; height: 100%; object-fit: cover; }
    .author-name { font-weight: 700; font-size: .9375rem; }
    .author-cred { font-size: .8125rem; color: var(--muted); }
    .meta-divider { width: 1px; height: 2rem; background: var(--border); }
    .article-meta-date { font-size: .8125rem; color: var(--muted); }

    .article-body { padding: 3.5rem 0 2rem; }
    .article-section { margin-bottom: 4rem; }
    .article-section:last-child { margin-bottom: 0; }
    .section-h2 { font-size: clamp(1.25rem, 2.8vw, 1.625rem); font-weight: 700; color: var(--fg); margin-bottom: 1.5rem; line-height: 1.3; padding-bottom: .75rem; border-bottom: 2px solid rgba(245,166,32,.25); }
    .section-h3 { font-size: 1.0625rem; font-weight: 700; color: var(--fg); margin-top: 2rem; margin-bottom: .875rem; line-height: 1.4; display: flex; align-items: flex-start; gap: .625rem; }
    .section-h3::before { content: ''; display: inline-block; width: 3px; height: 1.25em; flex-shrink: 0; background: var(--primary); border-radius: 2px; margin-top: .1em; }
    .article-p { font-size: .9625rem; color: rgba(240,244,248,.88); line-height: 1.85; margin-bottom: 1.25rem; }
    .article-p:last-child { margin-bottom: 0; }
    .article-p strong { color: var(--fg); }
    .article-p a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
    .article-p a:hover { opacity: .8; }

    .callout { background: rgba(245,166,32,.05); border: 1px solid rgba(245,166,32,.2); border-radius: .875rem; padding: 1.25rem 1.5rem; margin: 1.75rem 0; }
    .callout-title { font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--primary); margin-bottom: .625rem; }
    .callout p { font-size: .9rem; color: rgba(240,244,248,.85); line-height: 1.75; }
    .callout p strong { color: var(--fg); }

    .layer-cards { display: flex; flex-direction: column; gap: 1.25rem; margin: 1.5rem 0; }
    .layer-card { background: rgba(15,21,37,.5); border: 1px solid var(--border); border-radius: 1rem; padding: 1.5rem 1.75rem; display: grid; grid-template-columns: auto 1fr; gap: 1.25rem; align-items: start; }
    .layer-num { font-family: 'Outfit', sans-serif; font-size: 2.25rem; font-weight: 800; color: rgba(245,166,32,.15); line-height: 1; user-select: none; min-width: 2.5rem; }
    .layer-tag { display: inline-block; padding: .2rem .65rem; border-radius: 9999px; background: rgba(245,166,32,.1); border: 1px solid rgba(245,166,32,.2); color: var(--primary); font-size: .75rem; font-weight: 700; letter-spacing: .05em; margin-bottom: .625rem; }
    .layer-card h3 { font-size: 1rem; font-weight: 700; margin-bottom: .625rem; line-height: 1.4; }
    .layer-card h3::before { display: none; }
    .layer-card p { font-size: .875rem; color: var(--muted); line-height: 1.75; }
    .layer-card p strong { color: rgba(240,244,248,.85); }

    .stat-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; margin: 1.75rem 0; }
    @media(max-width:600px){ .stat-row{ grid-template-columns:1fr 1fr; } }
    .stat-box { background: rgba(15,21,37,.5); border: 1px solid var(--border); border-radius: .875rem; padding: 1.25rem; text-align: center; }
    .stat-num { font-family: 'Outfit', sans-serif; font-size: 2rem; font-weight: 800; color: var(--primary); line-height: 1.1; margin-bottom: .375rem; }
    .stat-label { font-size: .8125rem; color: var(--muted); line-height: 1.5; }

    .social-icon-list { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.5rem; }
    .social-icon-link {
      display: inline-flex; align-items: center; justify-content: center;
      width: 2.65rem; height: 2.65rem; border-radius: 9999px;
      background: rgba(15,21,37,.5); border: 1px solid var(--border);
      transition: border-color .2s, background .2s, transform .2s;
      color: var(--primary);
    }
    .social-icon-link:hover { border-color: rgba(245,166,32,.42); background: rgba(245,166,32,.05); transform: translateY(-1px); }
    .social-icon-link svg {
      width: 1.22rem; height: 1.22rem; fill: none; stroke: currentColor;
      stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
    }
    .social-icon-fill { fill: currentColor; stroke: none; }
    .social-icon-mark {
      font-family: 'Outfit', sans-serif; font-size: 1.05rem; font-weight: 800;
      line-height: 1; letter-spacing: 0;
    }
    .social-icon-mark-wide {
      font-size: .82rem;
    }

    .faq-list { display: flex; flex-direction: column; gap: .75rem; margin-top: 1.5rem; }
    .faq-item { background: rgba(15,21,37,.5); border: 1px solid var(--border); border-radius: 1rem; overflow: hidden; }
    .faq-q { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; padding: 1.25rem 1.5rem; cursor: pointer; list-style: none; font-weight: 700; font-size: .9375rem; color: var(--fg); }
    .faq-q::-webkit-details-marker { display: none; }
    .faq-icon { flex-shrink: 0; width: 1.25rem; height: 1.25rem; color: var(--primary); margin-top: .1rem; transition: transform .2s; }
    .faq-item details[open] .faq-icon { transform: rotate(45deg); }
    .faq-item:has(details[open]) { border-color: rgba(245,166,32,.3); background: var(--card); }
    .faq-a { padding: 0 1.5rem 1.5rem; padding-top: 1rem; font-size: .9rem; color: var(--muted); line-height: 1.8; border-top: 1px solid var(--border); }
    .faq-a strong { color: rgba(240,244,248,.85); }

    .article-cta { background: linear-gradient(to top, rgba(245,166,32,.08), transparent); border-top: 1px solid var(--border); padding: 5rem 0; text-align: center; margin-top: 2rem; }
    .article-cta h2 { margin-bottom: 1.25rem; }
    .article-cta .cta-sub { color: var(--muted); margin-bottom: 1rem; }
    .article-cta .cta-body { color: rgba(240,244,248,.88); margin-bottom: 2.5rem; max-width: 38rem; margin-left: auto; margin-right: auto; line-height: 1.8; font-size: .9625rem; }
    .article-cta .btn-row { justify-content: center; }

    footer { background: var(--bg); border-top: 1px solid var(--border); padding: 3rem 0; margin-top: 0; text-align: center; color: var(--muted); }
    .footer-logo { display: flex; align-items: center; justify-content: center; gap: .5rem; margin-bottom: 1rem; opacity: .5; }
    .footer-logo span { font-family: 'Outfit', sans-serif; font-size: 1.125rem; font-weight: 700; }

    @media(max-width:640px) { .btn-row { flex-direction: column; } .btn { width: 100%; } .layer-card { grid-template-columns: 1fr; } .layer-num { font-size: 1.5rem; } }