:root {
      --primary: #38bdf8;
      --accent: #a78bfa;
      --bg: #0f172a;
      --text: #e2e8f0;
      --border: #2d3a5e;
      --muted: #8ea0c0;
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    body {
      background-color: var(--bg);
      color: var(--text);
      font-family: 'Inter', sans-serif;
      line-height: 1.7;
      overflow-x: hidden;
    }
    /* 渐变光晕装饰 */
    .glow {
      position: fixed;
      width: 60vw;
      height: 60vw;
      background: radial-gradient(circle at 30% 30%, rgba(56,189,248,0.08), transparent 70%);
      filter: blur(60px);
      z-index: 0;
      pointer-events: none;
      border-radius: 50%;
    }
    .glow2 {
      position: fixed;
      bottom: 0;
      right: 0;
      width: 50vw;
      height: 50vw;
      background: radial-gradient(circle at 70% 70%, rgba(167,139,250,0.07), transparent 70%);
      filter: blur(70px);
      z-index: 0;
      pointer-events: none;
      border-radius: 50%;
    }
    .container-custom {
      position: relative;
      z-index: 2;
      max-width: 720px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    /* 极简卡片，无阴影纯描边 */
    .card-border {
      background: transparent;
      border: 1px solid var(--border);
      border-radius: 2px;
      transition: border 0.2s ease, transform 0.2s ease;
    }
    .card-border:hover {
      border-color: var(--primary);
      transform: translateY(-2px);
    }
    /* 等宽字体数据 */
    .mono {
      font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
      letter-spacing: 0.5px;
    }
    /* 导航 */
    .navbar {
      border-bottom: 1px solid var(--border);
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(4px);
      padding: 14px 0;
    }
    .navbar-brand {
      font-weight: 800;
      font-size: 1.8rem;
      color: var(--text) !important;
      letter-spacing: -0.5px;
    }
    .navbar-brand i {
      color: var(--primary);
      margin-right: 6px;
    }
    .navbar .nav-link {
      color: var(--muted);
      font-weight: 500;
      margin: 0 10px;
      transition: color 0.2s;
    }
    .navbar .nav-link:hover {
      color: var(--primary);
    }
    .navbar-toggler {
      border-color: var(--border);
    }
    /* hero大数字 */
    .hero-stat {
      font-size: 4.2rem;
      font-weight: 900;
      line-height: 1.1;
      letter-spacing: -2px;
      background: linear-gradient(135deg, var(--primary) 20%, var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-sub {
      font-size: 1.1rem;
      color: var(--muted);
      max-width: 520px;
    }
    .btn-outline-primary {
      border: 1px solid var(--primary) !important;
      color: var(--primary) !important;
      border-radius: 0;
      font-weight: 600;
      padding: 8px 26px;
      transition: all 0.2s;
    }
    .btn-outline-primary:hover {
      background: rgba(56,189,248,0.05);
    }
    /* 时间线 */
    .timeline-item {
      display: flex;
      gap: 24px;
      position: relative;
      padding-bottom: 40px;
    }
    .timeline-item::before {
      content: '';
      position: absolute;
      left: 7px;
      top: 24px;
      bottom: -4px;
      width: 2px;
      background: var(--border);
    }
    .timeline-dot {
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: var(--bg);
      border: 2px solid var(--primary);
      flex-shrink: 0;
      z-index: 2;
      margin-top: 6px;
    }
    .timeline-content {
      flex: 1;
    }
    /* 标签页 */
    .nav-tabs {
      border-bottom: 1px solid var(--border);
    }
    .nav-tabs .nav-link {
      color: var(--muted);
      border: none;
      border-bottom: 2px solid transparent;
      background: transparent;
      font-weight: 600;
      padding: 12px 18px;
      border-radius: 0;
    }
    .nav-tabs .nav-link.active {
      color: var(--primary);
      border-bottom: 2px solid var(--primary);
      background: transparent;
    }
    .tab-pane {
      padding: 20px 0;
    }
    /* 卡片错落滚动 */
    .feature-card {
      opacity: 0;
      transform: translateY(30px);
      transition: opacity 0.6s cubic-bezier(0.2, 0.9, 0.3, 1), transform 0.6s cubic-bezier(0.2, 0.9, 0.3, 1);
      transition-delay: calc(var(--delay) * 100ms);
    }
    .feature-card.reveal {
      opacity: 1;
      transform: translateY(0);
    }
    /* 海报hover播放按钮 */
    .poster-card {
      position: relative;
      background: #1a2440;
      aspect-ratio: 3/4;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border);
      transition: border 0.2s;
      min-height: 160px;
    }
    .poster-card i {
      position: absolute;
      font-size: 2.5rem;
      color: white;
      background: rgba(15,23,42,0.6);
      padding: 12px;
      border-radius: 50%;
      opacity: 0;
      transform: scale(0.8);
      transition: all 0.25s;
      pointer-events: none;
    }
    .poster-card:hover i {
      opacity: 1;
      transform: scale(1);
    }
    .poster-card:hover {
      border-color: var(--primary);
    }
    .poster-card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0;
      transition: opacity 0.4s;
    }
    .poster-card img.loaded {
      opacity: 1;
    }
    /* 懒加载占位 */
    .placeholder-glow {
      background: #1a2440;
    }
    /* CTA */
    .cta-section {
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
      padding: 60px 0;
    }
    /* 友链 */
    .friend-links a {
      color: var(--muted);
      margin: 0 10px;
      text-decoration: underline;
      text-underline-offset: 4px;
      font-size: 0.9rem;
    }
    .friend-links a:hover {
      color: var(--primary);
    }
    footer {
      border-top: 1px solid var(--border);
    }
    h2, h3 {
      font-weight: 800;
      letter-spacing: -0.02em;
    }
    p {
      color: #b6c2da;
    }
    .text-accent {
      color: var(--accent);
    }
    .text-primary-soft {
      color: var(--primary);
    }
    @media (max-width: 576px) {
      .hero-stat { font-size: 3rem; }
      .navbar-brand { font-size: 1.4rem; }
    }

/* --- 子页面追加 --- */
/* 页面专属补充样式 */
        .about-hero {
            padding: 80px 0 40px;
            text-align: center;
        }
.about-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
.about-hero .hero-sub {
            max-width: 700px;
            margin: 0 auto;
            font-size: 1.15rem;
            line-height: 1.8;
        }
.about-section {
            padding: 40px 0;
        }
.about-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--primary);
            position: relative;
            padding-bottom: 12px;
        }
.about-section h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
        }
.about-section h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin: 20px 0 12px;
            color: var(--text);
        }
.about-section p {
            line-height: 1.9;
            color: var(--muted);
            margin-bottom: 16px;
        }
.about-section ul, .about-section ol {
            color: var(--muted);
            line-height: 1.9;
            padding-left: 20px;
            margin-bottom: 16px;
        }
.about-section li {
            margin-bottom: 8px;
        }
.about-card {
            background: rgba(56, 189, 248, 0.05);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 24px;
            margin-bottom: 20px;
            transition: transform 0.3s ease, border-color 0.3s ease;
        }
.about-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
        }
.about-card i {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
.about-card h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }
.about-card p {
            font-size: 0.95rem;
            margin-bottom: 0;
        }
.stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
        }
.stat-label {
            font-size: 0.9rem;
            color: var(--muted);
        }
.timeline-item::after {
            content: '';
            position: absolute;
            left: 5px;
            top: 24px;
            width: 2px;
            height: calc(100% - 20px);
            background: var(--border);
        }
.timeline-item:last-child::after {
            display: none;
        }
.timeline-year {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent);
            margin-bottom: 4px;
        }
.timeline-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
        }
.timeline-desc {
            font-size: 0.95rem;
            color: var(--muted);
            line-height: 1.7;
        }
.cta-box {
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.1), rgba(167, 139, 250, 0.1));
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 40px;
            text-align: center;
            margin: 40px 0;
        }
.cta-box h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
        }
.cta-box p {
            color: var(--muted);
            margin-bottom: 20px;
        }
.about-hero h1 {
                font-size: 2rem;
            }
.about-section h2 {
                font-size: 1.5rem;
            }
.cta-box {
                padding: 24px;
            }