:root {
    --primary: #0891b2;
    --accent: #0ea5e9;
    --bg: #ecfeff;
    --text: #083344;
    --border: #bae6fd;
    --card-bg: #ffffff;
    --radius: 20px;
    --font-title: 'Comic Sans MS', 'Chalkboard SE', 'Segoe Print', 'HanziPen SC', cursive;
  }

  * { box-sizing: border-box; }
  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    margin: 0;
    overflow-x: hidden;
  }

  h1, h2, h3, .logo-font, .hero-title, .timeline-title {
    font-family: var(--font-title);
    font-weight: 700;
    letter-spacing: 1px;
  }

  /* 纯描边，无阴影 */
  .card, .feature-card, .timeline-item, .faq-item, .cta-box {
    background: transparent;
    border: 2px solid var(--primary);
    border-radius: var(--radius);
    box-shadow: none;
    transition: all 0.3s ease;
  }

  /* hover上浮+阴影加深（这里只加阴影，但保留描边） */
  .card:hover, .feature-card:hover, .timeline-item:hover, .faq-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 20px -10px rgba(8, 145, 178, 0.3);
    border-color: var(--accent);
  }

  /* 导航 */
  .navbar-custom {
    background: rgba(236, 254, 255, 0.85);
    backdrop-filter: blur(6px);
    border-bottom: 2px solid var(--primary);
  }
  .navbar-brand {
    font-family: var(--font-title);
    font-size: 1.9rem;
    font-weight: 800;
    color: var(--primary) !important;
    letter-spacing: 2px;
  }
  .navbar-nav .nav-link {
    color: var(--text) !important;
    font-weight: 500;
    margin: 0 0.5rem;
    border-bottom: 2px solid transparent;
  }
  .navbar-nav .nav-link:hover {
    border-bottom-color: var(--accent);
  }

  /* Hero */
  .hero-section {
    padding: 4rem 0 3rem;
    border-bottom: 2px solid var(--border);
  }
  .hero-title {
    font-size: clamp(2.8rem, 7vw, 5rem);
    color: var(--primary);
    line-height: 1.1;
    word-break: keep-all;
  }
  .hero-sub {
    font-size: 1.35rem;
    font-weight: 300;
    max-width: 650px;
    margin: 1.2rem auto 2rem;
  }
  .btn-custom {
    border: 2px solid var(--primary);
    border-radius: 60px;
    padding: 0.75rem 2rem;
    font-weight: 600;
    background: transparent;
    color: var(--primary);
    transition: 0.25s;
    margin: 0.3rem;
  }
  .btn-custom:hover, .btn-custom:focus {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 4px 10px rgba(8,145,178,0.2);
  }
  .btn-solid {
    background: var(--primary);
    color: white !important;
    border-color: var(--primary);
  }

  /* 特色卡片 - 标签页切换（纯CSS模拟） */
  .features-wrapper {
    padding: 4rem 0;
  }
  .section-title {
    font-size: 2.5rem;
    border-bottom: 4px solid var(--accent);
    display: inline-block;
    padding-bottom: 0.3rem;
    margin-bottom: 2rem;
  }
  .tab-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    justify-content: center;
    margin-bottom: 2.5rem;
  }
  .tab-label {
    border: 2px solid var(--primary);
    padding: 0.45rem 1.5rem;
    border-radius: 40px;
    cursor: pointer;
    font-weight: 600;
    background: transparent;
    color: var(--text);
    transition: 0.2s;
  }
  .tab-label:hover {
    background: var(--primary);
    color: white;
  }
  input.tab-radio { display: none; }
  #tab1:checked ~ .tab-container label[for="tab1"],
  #tab2:checked ~ .tab-container label[for="tab2"],
  #tab3:checked ~ .tab-container label[for="tab3"] {
    background: var(--primary);
    color: white;
  }
  .tab-pane { display: none; }
  #tab1:checked ~ .panels .pane1,
  #tab2:checked ~ .panels .pane2,
  #tab3:checked ~ .panels .pane3 {
    display: block;
    animation: fadeIn 0.3s ease;
  }
  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .feature-card {
    padding: 1.5rem;
    background: rgba(255,255,255,0.6);
    backdrop-filter: blur(2px);
    height: 100%;
  }
  .feature-icon {
    font-size: 2.5rem;
    color: var(--accent);
  }

  /* 时间线（长文介绍） */
  .timeline-section {
    padding: 4rem 0;
  }
  .timeline-container {
    display: flex;
    flex-direction: column;
    position: relative;
    margin-top: 2rem;
  }
  .timeline-item {
    position: relative;
    padding: 1.5rem 2rem;
    margin-left: 1.5rem;
    border-left: 4px solid var(--accent);
    border-radius: 0 20px 20px 0;
    margin-bottom: 2rem;
    background: rgba(255,255,255,0.4);
    backdrop-filter: blur(2px);
  }
  .timeline-item::before {
    content: attr(data-year);
    position: absolute;
    left: -1.8rem;
    top: 1.5rem;
    background: var(--bg);
    border: 3px solid var(--primary);
    color: var(--primary);
    font-weight: 800;
    border-radius: 40px;
    padding: 0.2rem 1rem;
    font-size: 0.9rem;
    letter-spacing: 1px;
  }
  .timeline-title {
    font-size: 1.8rem;
    color: var(--primary);
  }

  /* FAQ */
  .faq-section { padding: 4rem 0; }
  .faq-item {
    padding: 1.3rem 1.8rem;
    margin-bottom: 1rem;
    background: rgba(255,255,255,0.5);
  }
  .faq-question {
    font-size: 1.2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
  }
  .faq-question i { color: var(--accent); }

  /* CTA + 友情链接 */
  .cta-section {
    padding: 4rem 0 3rem;
    text-align: center;
  }
  .cta-box {
    border: 3px dashed var(--primary);
    padding: 2.5rem;
    border-radius: 60px;
  }
  .friend-links {
    padding: 3rem 0 2rem;
    border-top: 2px solid var(--border);
  }
  .friend-links h3 {
    font-size: 1.8rem;
    margin-bottom: 1.2rem;
  }
  .footer {
    background: transparent;
    border-top: 2px solid var(--border);
    padding: 2rem 0;
    color: var(--text);
    font-weight: 500;
  }

  /* 滚动渐显动效 */
  .reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.7s cubic-bezier(.2,.8,.2,1), transform 0.7s cubic-bezier(.2,.8,.2,1);
  }
  .reveal.show {
    opacity: 1;
    transform: translateY(0);
  }
  .delay-1 { transition-delay: 0.1s; }
  .delay-2 { transition-delay: 0.2s; }
  .delay-3 { transition-delay: 0.3s; }

  /* 懒加载占位渐显 */
  .lazy-img {
    background: linear-gradient(135deg, #e0f2fe 0%, #bae6fd 100%);
    min-height: 120px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-weight: 600;
  }

  /* 纯占位随机图 */
  .poster-placeholder {
    width: 100%;
    aspect-ratio: 2/3;
    background: linear-gradient(145deg, #cffafe, #a5f3fc);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--primary);
    border: 2px solid var(--primary);
  }

  @media (max-width: 768px) {
    .hero-title { font-size: 3rem; }
    .timeline-item { margin-left: 1rem; padding: 1.2rem; }
    .navbar-nav { text-align: center; }
  }

/* --- 子页面追加 --- */
/* 关于页专属微调 */
        .about-hero {
            background: linear-gradient(135deg, var(--bg) 0%, #d9f3ff 100%);
            border-bottom: 2px solid var(--border);
        }
.about-section {
            background: var(--card-bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 2.5rem;
            margin-bottom: 2rem;
            box-shadow: 0 4px 20px rgba(8, 145, 178, 0.06);
        }
.about-section h2 {
            color: var(--primary);
            font-family: var(--font-title);
            font-weight: 700;
            margin-bottom: 1.2rem;
            font-size: 1.8rem;
            position: relative;
            padding-bottom: 0.6rem;
        }
.about-section h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: var(--accent);
            border-radius: 3px;
        }
.about-section p {
            color: var(--text);
            line-height: 1.8;
            font-size: 1.02rem;
            margin-bottom: 1rem;
        }
.about-section ul {
            color: var(--text);
            padding-left: 1.2rem;
        }
.about-section li {
            margin-bottom: 0.6rem;
            line-height: 1.7;
        }
.about-section strong {
            color: var(--primary);
        }
.about-section .fa-check-circle {
            color: var(--accent);
            margin-right: 8px;
        }
.about-icon {
            font-size: 2.2rem;
            color: var(--accent);
            margin-bottom: 0.8rem;
        }
.about-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            justify-content: center;
            margin: 2rem 0;
        }
.stat-item {
            text-align: center;
            background: rgba(255,255,255,0.7);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.2rem 1.8rem;
            min-width: 140px;
        }
.stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            font-family: var(--font-title);
        }
.stat-label {
            color: var(--text);
            font-size: 0.9rem;
            opacity: 0.8;
        }
.about-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            border-radius: var(--radius);
            padding: 2.5rem;
            text-align: center;
            color: #fff;
            margin-top: 2rem;
        }
.about-cta h3 {
            font-family: var(--font-title);
            font-size: 1.8rem;
            margin-bottom: 0.8rem;
        }
.about-cta p {
            color: rgba(255,255,255,0.9);
            margin-bottom: 1.2rem;
        }
.about-section {
                padding: 1.5rem;
            }
.about-stats {
                gap: 0.8rem;
            }
.stat-item {
                min-width: 110px;
                padding: 0.8rem 1rem;
            }

/* --- 子页面追加 --- */
/* 免责声明页面专属样式 - 轻量补充，保持整体风格 */
        .disclaimer-hero {
            padding: 80px 0 40px;
            background: var(--bg);
        }
.disclaimer-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 40px;
            margin-bottom: 30px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            transition: transform 0.2s ease;
        }
.disclaimer-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0,0,0,0.08);
        }
.disclaimer-card h2 {
            color: var(--primary);
            font-family: var(--font-title);
            font-weight: 700;
            font-size: 1.6rem;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border);
        }
.disclaimer-card p {
            color: var(--text);
            line-height: 1.8;
            margin-bottom: 14px;
            font-size: 0.98rem;
        }
.disclaimer-card ul {
            padding-left: 20px;
            color: var(--text);
            line-height: 1.8;
            margin-bottom: 14px;
        }
.disclaimer-card li {
            margin-bottom: 8px;
            font-size: 0.95rem;
        }
.disclaimer-card strong {
            color: var(--primary);
        }
.disclaimer-date {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            margin-bottom: 20px;
        }
.contact-box {
            background: rgba(8, 145, 178, 0.06);
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 24px;
            margin-top: 20px;
        }
.contact-box a {
            color: var(--primary);
            font-weight: 600;
            text-decoration: none;
            border-bottom: 1px dashed var(--primary);
        }
.contact-box a:hover {
            color: var(--accent);
            border-bottom-style: solid;
        }
.icon-text {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
.icon-text i {
            color: var(--primary);
            font-size: 1.1rem;
        }
.disclaimer-card {
                padding: 24px;
            }
.disclaimer-card h2 {
                font-size: 1.35rem;
            }