:root {
    --primary: #38bdf8;
    --accent: #a78bfa;
    --bg: #0f172a;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --card-bg: #1e293b;
    --border: #334155;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow: 0 10px 30px rgba(0,0,0,0.35);
    --font-head: 'Source Han Serif SC', 'Noto Serif SC', 'Songti SC', 'STSong', serif;
    --font-body: 'Source Han Sans SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 80px; }
  body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.65;
    overflow-x: hidden;
  }
  h1, h2, h3, h4, .font-head { font-family: var(--font-head); font-weight: 700; }

  /* 导航吸顶 */
  .sticky-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
  }
  .navbar-brand {
    font-size: 1.45rem;
    font-weight: 800;
    color: var(--primary) !important;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-head);
  }
  .navbar-brand i { color: var(--accent); font-size: 1.5rem; }
  .nav-link {
    color: var(--text) !important;
    font-weight: 500;
    margin: 0 6px;
    padding: 6px 14px !important;
    border-radius: 100px;
    transition: all 0.3s;
  }
  .nav-link:hover { color: var(--primary) !important; background: rgba(56, 189, 248, 0.08); }
  .navbar-toggler { border-color: var(--border) !important; }
  .navbar-toggler:focus { box-shadow: none; }
  .navbar-toggler-icon { background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(226, 232, 240, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e"); }

  /* 按钮 */
  .btn-rounded { border-radius: 100px; padding: 10px 28px; font-weight: 600; }
  .btn-primary-custom { background: var(--primary); color: #0f172a; border: none; transition: all 0.3s; }
  .btn-primary-custom:hover { background: #0ea5e9; transform: translateY(-2px); box-shadow: 0 8px 25px rgba(56,189,248,0.3); }
  .btn-accent-custom { background: transparent; color: var(--accent); border: 2px solid var(--accent); transition: all 0.3s; }
  .btn-accent-custom:hover { background: var(--accent); color: #0f172a; transform: translateY(-2px); box-shadow: 0 8px 25px rgba(167,139,250,0.3); }

  /* Hero 双色块分屏 */
  .hero-section {
    position: relative;
    padding: 80px 0 90px;
    overflow: hidden;
  }
  .hero-bg-left, .hero-bg-right {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 50%;
    z-index: 0;
  }
  .hero-bg-left {
    left: 0;
    background: linear-gradient(135deg, rgba(56,189,248,0.15), transparent 60%);
    clip-path: polygon(0 0, 100% 0, 85% 100%, 0 100%);
  }
  .hero-bg-right {
    right: 0;
    background: linear-gradient(225deg, rgba(167,139,250,0.12), transparent 60%);
    clip-path: polygon(15% 0, 100% 0, 100% 100%, 0 100%);
  }
  .hero-content { position: relative; z-index: 2; }
  .hero-title {
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    font-weight: 900;
    line-height: 1.15;
    color: #fff;
    margin-bottom: 18px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.4);
  }
  .hero-title .highlight {
    color: var(--primary);
    position: relative;
    display: inline-block;
  }
  .hero-title .highlight::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 100%;
    height: 10px;
    background: rgba(167,139,250,0.3);
    border-radius: 10px;
    z-index: -1;
  }
  .hero-sub {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 32px;
    max-width: 540px;
  }

  /* 波浪分割 */
  .wave-divider {
    display: block;
    width: 100%;
    height: 60px;
    margin-bottom: -1px;
  }

  /* 特色卡片 */
  .section-title {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
  }
  .section-subtitle {
    color: var(--text-muted);
    margin-bottom: 36px;
    font-size: 0.95rem;
  }
  .feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    height: 100%;
    transition: all 0.4s;
    box-shadow: var(--shadow);
  }
  .feature-card:hover { transform: translateY(-6px); border-color: var(--primary); }
  .feature-icon {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 16px;
    background: linear-gradient(135deg, rgba(56,189,248,0.2), rgba(167,139,250,0.2));
    color: var(--primary);
  }
  .feature-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; color: #fff; }
  .feature-card p { color: var(--text-muted); font-size: 0.88rem; margin: 0; }

  /* 长文介绍 手风琴 */
  .long-article {
    position: relative;
    padding: 70px 0;
    background: linear-gradient(180deg, transparent 0%, rgba(56,189,248,0.04) 50%, transparent 100%);
  }
  .accordion-item {
    background: var(--card-bg);
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-md) !important;
    margin-bottom: 12px;
    overflow: hidden;
  }
  .accordion-button {
    background: var(--card-bg);
    color: var(--text);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 18px 24px;
    font-family: var(--font-body);
  }
  .accordion-button:not(.collapsed) {
    background: rgba(56,189,248,0.08);
    color: var(--primary);
    box-shadow: none;
  }
  .accordion-button:focus { box-shadow: none; }
  .accordion-button::after { filter: invert(0.8); }
  .accordion-body { padding: 16px 24px 20px; color: var(--text-muted); font-size: 0.88rem; }

  /* FAQ */
  .faq-section { padding: 70px 0; }
  .faq-item {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 22px 26px;
    margin-bottom: 12px;
    border-left: 4px solid var(--accent);
  }
  .faq-item h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: #fff; }
  .faq-item p { color: var(--text-muted); font-size: 0.88rem; margin: 0; }

  /* CTA */
  .cta-section {
    padding: 60px 0 80px;
    text-align: center;
  }
  .cta-box {
    background: linear-gradient(135deg, rgba(56,189,248,0.15), rgba(167,139,250,0.15));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 50px 30px;
    max-width: 750px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
  }
  .cta-box::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(56,189,248,0.1) 0%, transparent 70%);
    animation: pulse 6s infinite;
  }
  @keyframes pulse { 0%,100% { opacity: 0.4; } 50% { opacity: 1; } }
  .cta-box h2 { font-size: 1.8rem; font-weight: 800; margin-bottom: 12px; position: relative; z-index: 1; }
  .cta-box p { color: var(--text-muted); margin-bottom: 24px; position: relative; z-index: 1; }

  /* 友情链接 */
  .friend-links {
    background: var(--card-bg);
    border-top: 1px solid var(--border);
    padding: 30px 0;
  }
  .friend-links h5 {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 10px;
  }

  /* 页脚 */
  footer {
    background: #0a1120;
    padding: 30px 0 20px;
    border-top: 1px solid var(--border);
  }
  .footer-links a { color: var(--text-muted); text-decoration: none; margin: 0 10px; font-size: 0.85rem; }
  .footer-links a:hover { color: var(--primary); }
  .copyright { color: var(--text-muted); font-size: 0.82rem; margin-top: 8px; }

  /* 滚动动效 */
  .reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
  }
  .reveal.visible { opacity: 1; transform: translateY(0); }

  /* 海报 hover */
  .comic-card {
    border-radius: var(--radius-md);
    overflow: hidden;
    position: relative;
    aspect-ratio: 3/4;
    background: var(--card-bg);
    box-shadow: var(--shadow);
    transition: transform 0.4s;
    cursor: pointer;
  }
  .comic-card:hover { transform: translateY(-4px); }
  .comic-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.4s;
  }
  .comic-card .play-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15,23,42,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.4s;
  }
  .comic-card:hover .play-overlay { opacity: 1; }
  .comic-card .play-overlay i {
    width: 50px; height: 50px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0f172a;
    font-size: 1.2rem;
    transform: scale(0.6);
    transition: transform 0.4s;
  }
  .comic-card:hover .play-overlay i { transform: scale(1); }

  /* 响应式 */
  @media (max-width: 768px) {
    .hero-title { font-size: 1.8rem; }
    .section-title { font-size: 1.4rem; }
    .cta-box { padding: 36px 20px; }
  }

/* --- 子页面追加 --- */
/* 本页专属样式（少量） */
        .about-hero {
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.15) 0%, rgba(167, 139, 250, 0.1) 100%);
            border-radius: var(--radius-lg);
            padding: 4rem 2rem;
            text-align: center;
            position: relative;
            overflow: hidden;
            margin-top: 2rem;
        }
.about-hero h1 {
            font-family: var(--font-head);
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 1rem;
            position: relative;
            z-index: 2;
        }
.about-hero p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
            line-height: 1.8;
        }
.about-hero::before {
            content: '\f6b3';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            font-size: 12rem;
            color: rgba(56, 189, 248, 0.08);
            right: 5%;
            top: 50%;
            transform: translateY(-50%);
            z-index: 1;
        }
.about-hero::after {
            content: '\f6b3';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            font-size: 8rem;
            color: rgba(167, 139, 250, 0.06);
            left: 3%;
            bottom: -2rem;
            transform: rotate(-20deg);
            z-index: 1;
        }
.about-section {
            padding: 4rem 0;
        }
.about-section .section-title {
            font-family: var(--font-head);
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.75rem;
        }
.about-section .section-title::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 p {
            color: var(--text-muted);
            line-height: 1.9;
            font-size: 1rem;
        }
.about-section .lead-text {
            font-size: 1.05rem;
            color: var(--text);
            line-height: 1.9;
        }
.value-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1.8rem 1.5rem;
            height: 100%;
            transition: transform 0.3s ease, border-color 0.3s ease;
        }
.value-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
        }
.value-card .icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 1.2rem;
            background: rgba(56, 189, 248, 0.15);
            color: var(--primary);
        }
.value-card .icon-wrap.purple {
            background: rgba(167, 139, 250, 0.15);
            color: var(--accent);
        }
.value-card .icon-wrap.green {
            background: rgba(52, 211, 153, 0.15);
            color: #34d399;
        }
.value-card h3 {
            font-family: var(--font-head);
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.8rem;
        }
.value-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.8;
        }
.stats-wrap {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2.5rem 1.5rem;
            text-align: center;
        }
.stats-wrap .stat-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            font-family: var(--font-head);
        }
.stats-wrap .stat-label {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 0.4rem;
        }
.timeline-item {
            position: relative;
            padding-left: 2rem;
            padding-bottom: 2rem;
            border-left: 2px solid var(--border);
        }
.timeline-item:last-child {
            border-left-color: transparent;
            padding-bottom: 0;
        }
.timeline-item::before {
            content: '';
            position: absolute;
            left: -7px;
            top: 0;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.2);
        }
.timeline-item .time {
            font-size: 0.85rem;
            color: var(--accent);
            font-weight: 600;
            margin-bottom: 0.3rem;
        }
.timeline-item h4 {
            font-size: 1.05rem;
            color: var(--text);
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
.timeline-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
.about-hero {
                padding: 3rem 1.2rem;
            }
.about-hero h1 {
                font-size: 2rem;
            }
.about-hero p {
                font-size: 1rem;
            }
.about-section .section-title {
                font-size: 1.5rem;
            }
.stats-wrap .stat-num {
                font-size: 2rem;
            }

/* --- 子页面追加 --- */
/* 本页专属补充样式 */
        .privacy-hero {
            background: linear-gradient(135deg, rgba(56,189,248,0.08) 0%, rgba(167,139,250,0.08) 100%);
            padding: 80px 0 40px;
            position: relative;
            overflow: hidden;
        }
.privacy-hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(56,189,248,0.12) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }
.privacy-hero h1 {
            font-family: var(--font-head);
            font-weight: 800;
            color: var(--text);
            font-size: 2.6rem;
            margin-bottom: 16px;
        }
.privacy-hero h1 span {
            color: var(--primary);
        }
.privacy-hero .privacy-sub {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 720px;
            line-height: 1.8;
        }
.privacy-section {
            padding: 40px 0;
        }
.privacy-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px;
            margin-bottom: 28px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            box-shadow: 0 4px 20px rgba(0,0,0,0.2);
        }
.privacy-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0,0,0,0.3);
        }
.privacy-card h2 {
            font-family: var(--font-head);
            color: var(--primary);
            font-size: 1.45rem;
            font-weight: 700;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
.privacy-card h2 i {
            font-size: 1.3rem;
            color: var(--accent);
            background: rgba(167,139,250,0.15);
            padding: 8px;
            border-radius: 12px;
        }
.privacy-card h3 {
            font-family: var(--font-head);
            color: var(--text);
            font-size: 1.1rem;
            font-weight: 600;
            margin: 18px 0 10px;
        }
.privacy-card p, .privacy-card li {
            color: var(--text-muted);
            line-height: 1.85;
            font-size: 0.95rem;
        }
.privacy-card ul, .privacy-card ol {
            padding-left: 20px;
            margin-bottom: 12px;
        }
.privacy-card li {
            margin-bottom: 8px;
        }
.privacy-card strong {
            color: var(--text);
            font-weight: 600;
        }
.privacy-card .highlight-box {
            background: rgba(56,189,248,0.1);
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 16px 0;
        }
.privacy-card .highlight-box p {
            color: var(--text);
            margin: 0;
        }
.privacy-card .badge-privacy {
            display: inline-block;
            background: rgba(56,189,248,0.15);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
.update-note {
            display: flex;
            align-items: center;
            gap: 10px;
            background: rgba(167,139,250,0.1);
            border: 1px solid rgba(167,139,250,0.2);
            padding: 14px 20px;
            border-radius: 12px;
            margin-top: 30px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
.update-note i {
            color: var(--accent);
            font-size: 1.2rem;
        }
.privacy-hero h1 {
                font-size: 2rem;
            }
.privacy-card {
                padding: 24px 20px;
            }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.accordion-header { background:transparent !important; }