:root {
    --primary: #22d3ee;
    --accent: #fb923c;
    --bg: #0f172a;
    --text: #e2e8f0;
    --card-bg: #1e293b;
    --radius-lg: 24px;
    --radius-md: 16px;
    --shadow-soft: 0 20px 40px -12px rgba(0,0,0,0.5), 0 8px 24px -8px rgba(34,211,238,0.15);
    --font-title: 'Inter', sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;
  }
  h1,h2,h3,h4,.display-font { font-weight: 800; letter-spacing: -0.02em; }
  .container { max-width: 1200px; }

  /* 渐变光晕装饰 */
  .glow-orbit {
    position: fixed;
    width: 600px; height: 600px;
    background: radial-gradient(circle at 30% 30%, rgba(34,211,238,0.15), transparent 70%);
    filter: blur(60px);
    border-radius: 50%;
    z-index: -1;
    top: -200px; left: -150px;
    pointer-events: none;
  }
  .glow-orbit-2 {
    position: fixed;
    bottom: -200px; right: -100px;
    width: 500px; height: 500px;
    background: radial-gradient(circle at 60% 60%, rgba(251,146,60,0.12), transparent 70%);
    filter: blur(80px);
    border-radius: 50%;
    z-index: -1;
    pointer-events: none;
  }

  /* 导航 */
  .navbar-custom {
    background: rgba(15,23,42,0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(34,211,238,0.2);
    padding: 0.8rem 0;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    box-shadow: 0 10px 30px -15px rgba(0,0,0,0.6);
  }
  .navbar-brand {
    font-weight: 900;
    font-size: 1.8rem;
    color: var(--primary) !important;
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: -0.02em;
  }
  .navbar-brand i { color: var(--accent); }
  .nav-link {
    color: var(--text) !important;
    font-weight: 500;
    margin: 0 12px;
    transition: 0.2s;
    border-radius: 30px;
    padding: 6px 16px !important;
  }
  .nav-link:hover { color: var(--primary) !important; background: rgba(34,211,238,0.1); }

  /* 打字机 Hero */
  .hero-title {
    font-size: clamp(2.5rem, 8vw, 5.5rem);
    font-weight: 900;
    line-height: 1.1;
  }
  .typewriter-cursor {
    border-right: 4px solid var(--accent);
    animation: blink 1s step-end infinite;
  }
  @keyframes blink { 50% { border-color: transparent; } }

  /* 时间线 / 步骤条 */
  .timeline-wrapper {
    position: relative;
    padding: 20px 0;
  }
  .timeline-line {
    position: absolute;
    left: 50%;
    top: 20px;
    bottom: 20px;
    width: 4px;
    background: linear-gradient(to bottom, var(--primary), var(--accent));
    transform: translateX(-50%);
    border-radius: 4px;
    opacity: 0.3;
  }
  .timeline-item {
    position: relative;
    width: 100%;
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(.22,.61,.36,1), transform 0.6s cubic-bezier(.22,.61,.36,1);
  }
  .timeline-item.visible { opacity: 1; transform: translateY(0); }
  .timeline-badge {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 48px; height: 48px;
    border-radius: 50%;
    background: var(--bg);
    border: 3px solid var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: var(--primary);
    font-family: var(--font-mono);
    z-index: 2;
  }
  .timeline-card {
    margin-left: calc(50% + 40px);
    background: var(--card-bg);
    padding: 28px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255,255,255,0.04);
    transition: transform 0.3s, box-shadow 0.3s;
  }
  .timeline-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 30px 60px -12px rgba(0,0,0,0.7), 0 12px 30px -6px rgba(34,211,238,0.2);
  }
  @media (max-width: 768px) {
    .timeline-line { left: 20px; }
    .timeline-badge { left: 20px; transform: none; }
    .timeline-card { margin-left: 70px; }
  }

  /* 对比表格 */
  .comparison-table {
    background: rgba(30,41,59,0.7);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255,255,255,0.05);
  }
  .comparison-table th {
    background: rgba(34,211,238,0.1);
    font-weight: 700;
    color: var(--primary);
    padding: 18px;
    font-size: 1.1rem;
  }
  .comparison-table td {
    padding: 18px;
    border-top: 1px solid rgba(255,255,255,0.05);
  }
  .comparison-table tr:hover td { background: rgba(251,146,60,0.04); }
  .table-mono { font-family: var(--font-mono); font-size: 1.2rem; }

  /* 手风琴 */
  .accordion-custom .accordion-item {
    background: var(--card-bg);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-md) !important;
    margin-bottom: 16px;
    overflow: hidden;
    transition: box-shadow 0.3s;
  }
  .accordion-custom .accordion-item:hover { box-shadow: 0 8px 20px -8px rgba(34,211,238,0.2); }
  .accordion-button {
    background: transparent;
    color: var(--text);
    font-weight: 600;
    padding: 20px 24px;
    font-size: 1.15rem;
  }
  .accordion-button:not(.collapsed) {
    color: var(--primary);
    background: rgba(34,211,238,0.08);
    box-shadow: none;
  }
  .accordion-button:focus { box-shadow: none; }
  .accordion-body { color: #cbd5e1; padding: 0 24px 24px; }

  /* 特色图标卡 */
  .feature-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 30px 20px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 12px 24px -12px rgba(0,0,0,0.6);
    height: 100%;
  }
  .feature-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 24px 48px -16px rgba(0,0,0,0.8), 0 0 0 1px rgba(34,211,238,0.2);
  }
  .feature-icon {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 20px;
  }

  /* 数字滚动 */
  .stat-number {
    font-family: var(--font-mono);
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
  }

  /* CTA */
  .cta-glow {
    background: linear-gradient(145deg, rgba(34,211,238,0.15), rgba(251,146,60,0.1));
    border-radius: calc(var(--radius-lg) * 2);
    padding: 4rem 2rem;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.1);
  }
  .btn-glow {
    background: var(--accent);
    border: none;
    color: #0f172a;
    font-weight: 700;
    padding: 14px 36px;
    border-radius: 60px;
    font-size: 1.2rem;
    transition: all 0.3s;
    box-shadow: 0 8px 20px -6px rgba(251,146,60,0.6);
  }
  .btn-glow:hover { transform: scale(1.05); background: #ffa15c; color: #0f172a; }

  footer {
    border-top: 1px solid rgba(255,255,255,0.05);
    background: #0b1220;
  }
  .friend-links {
    background: rgba(255,255,255,0.02);
    border-radius: var(--radius-lg);
    padding: 30px;
    border: 1px dashed rgba(34,211,238,0.2);
  }
  .friend-links a { color: var(--text); margin: 0 12px; text-decoration: none; transition: 0.2s; }
  .friend-links a:hover { color: var(--primary); }

  /* 通用淡入 */
  .fade-section { opacity: 0; transform: translateY(40px); transition: opacity 0.7s ease, transform 0.7s ease; }
  .fade-section.visible { opacity: 1; transform: translateY(0); }

/* --- 子页面追加 --- */
.about-hero { padding: 120px 0 60px; position: relative; }
.about-hero .hero-title { font-size: 2.8rem; font-weight: 900; letter-spacing: -0.02em; margin-bottom: 1.5rem; }
.about-hero .lead-text { font-size: 1.2rem; line-height: 1.8; color: var(--text); opacity: 0.85; max-width: 800px; }
.story-card { background: var(--card-bg); border-radius: var(--radius-lg); padding: 40px; margin-bottom: 30px; box-shadow: var(--shadow-soft); border: 1px solid rgba(34,211,238,0.1); }
.story-card h3 { color: var(--primary); font-weight: 700; margin-bottom: 20px; font-size: 1.6rem; }
.story-card p { line-height: 1.9; color: var(--text); opacity: 0.9; }
.feature-list { list-style: none; padding: 0; }
.feature-list li { padding: 10px 0; border-bottom: 1px solid rgba(34,211,238,0.1); display: flex; align-items: center; gap: 12px; }
.feature-list li:last-child { border-bottom: none; }
.feature-list i { color: var(--accent); font-size: 1.2rem; width: 24px; text-align: center; }
.value-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin: 40px 0; }
.value-item { background: var(--card-bg); border-radius: var(--radius-md); padding: 30px; border: 1px solid rgba(251,146,60,0.1); transition: transform 0.3s ease; }
.value-item:hover { transform: translateY(-4px); }
.value-item h4 { color: var(--accent); font-weight: 700; margin-bottom: 15px; font-size: 1.2rem; }
.value-item p { font-size: 0.95rem; line-height: 1.7; opacity: 0.85; }
.milestone-tag { display: inline-block; background: rgba(34,211,238,0.1); color: var(--primary); padding: 6px 16px; border-radius: 20px; font-size: 0.85rem; font-weight: 600; margin-bottom: 15px; }
.about-footer-note { background: var(--card-bg); border-radius: var(--radius-lg); padding: 40px; margin-top: 50px; text-align: center; border: 1px solid rgba(34,211,238,0.15); }
.about-footer-note h3 { color: var(--primary); font-size: 1.4rem; margin-bottom: 15px; }
.section-title { font-size: 2rem; font-weight: 800; margin-bottom: 30px; color: var(--text); position: relative; display: inline-block; }
.section-title::after { content: ''; position: absolute; bottom: -10px; left: 0; width: 60%; height: 3px; background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 2px; }
.faq-q { color: var(--primary); font-weight: 600; }
.about-hero .hero-title { font-size: 2rem; }
.story-card { padding: 25px; }
.value-grid { grid-template-columns: 1fr; }
.about-footer-note { padding: 25px; }

/* --- 子页面追加 --- */
/* 本页仅覆盖必要的 Bootstrap 组件配色，防止白块 */
        .navbar-custom {
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(34, 211, 238, 0.15);
        }
.navbar-brand, .nav-link {
            color: var(--text) !important;
        }
.nav-link:hover, .nav-link.active {
            color: var(--primary) !important;
        }
.disclaimer-hero {
            padding: 3rem 0 2rem;
        }
.disclaimer-title {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -0.02em;
        }
.disclaimer-sub {
            color: var(--text);
            opacity: 0.8;
            max-width: 720px;
            margin: 1rem auto 0;
        }
.section-title-custom {
            font-size: 1.75rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 1.5rem;
            position: relative;
            display: inline-block;
        }
.section-title-custom::after {
            content: '';
            display: block;
            width: 40%;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin-top: 0.4rem;
            opacity: 0.7;
        }
.disclaimer-card {
            background: var(--card-bg);
            border: 1px solid rgba(34, 211, 238, 0.15);
            border-radius: var(--radius-md);
            padding: 2rem 1.8rem;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            height: 100%;
        }
.disclaimer-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-soft);
        }
.disclaimer-card i {
            color: var(--primary);
            font-size: 2rem;
            margin-bottom: 1rem;
        }
.disclaimer-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
.disclaimer-card p {
            font-size: 0.95rem;
            line-height: 1.7;
            opacity: 0.9;
        }
.info-list {
            list-style: none;
            padding-left: 0;
        }
.info-list li {
            padding-left: 1.8rem;
            position: relative;
            margin-bottom: 0.8rem;
            line-height: 1.6;
        }
.info-list li::before {
            content: '◆';
            color: var(--accent);
            position: absolute;
            left: 0;
            font-size: 0.8rem;
            top: 0.2rem;
        }
.footer-link-inline {
            color: var(--primary);
            text-decoration: none;
        }
.footer-link-inline:hover {
            text-decoration: underline;
        }
.disclaimer-note {
            background: rgba(251, 146, 60, 0.08);
            border-left: 4px solid var(--accent);
            padding: 1rem 1.5rem;
            border-radius: 0 12px 12px 0;
            margin-top: 2rem;
        }
.disclaimer-title {
                font-size: 2rem;
            }
.section-title-custom {
                font-size: 1.4rem;
            }
.disclaimer-card {
                padding: 1.5rem;
            }

/* --- 子页面追加 --- */
.privacy-section {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            margin-bottom: 2rem;
            border: 1px solid rgba(34,211,238,0.15);
            box-shadow: var(--shadow-soft);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
.privacy-section:hover {
            transform: translateY(-4px);
            box-shadow: 0 24px 48px -12px rgba(34,211,238,0.25);
        }
.privacy-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 1.5rem;
            display: inline-block;
            background: rgba(34,211,238,0.1);
            border-radius: 16px;
            padding: 1rem;
            width: 64px;
            height: 64px;
            text-align: center;
            line-height: 1.2;
        }
.privacy-section h2 {
            color: var(--primary);
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            padding-bottom: 0.75rem;
            border-bottom: 2px solid rgba(34,211,238,0.2);
        }
.privacy-section h3 {
            color: var(--accent);
            font-size: 1.15rem;
            font-weight: 600;
            margin-top: 1.5rem;
            margin-bottom: 0.75rem;
        }
.privacy-section p, .privacy-section li {
            color: var(--text);
            line-height: 1.8;
            font-size: 0.95rem;
        }
.privacy-section ul, .privacy-section ol {
            padding-left: 1.5rem;
            margin-bottom: 1rem;
        }
.privacy-section li {
            margin-bottom: 0.5rem;
        }
.privacy-highlight {
            background: rgba(34,211,238,0.05);
            border-left: 3px solid var(--primary);
            padding: 1rem 1.5rem;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 1.5rem 0;
        }
.privacy-highlight p {
            margin-bottom: 0.5rem;
        }
.last-updated {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(251,146,60,0.1);
            color: var(--accent);
            padding: 0.5rem 1rem;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 2rem;
        }
.contact-email {
            color: var(--primary);
            text-decoration: none;
            font-weight: 600;
            border-bottom: 1px dashed var(--primary);
            transition: all 0.3s ease;
        }
.contact-email:hover {
            color: var(--accent);
            border-bottom-color: var(--accent);
            text-decoration: none;
        }
.privacy-section {
                padding: 1.5rem;
                border-radius: var(--radius-md);
            }
.privacy-icon {
                width: 52px;
                height: 52px;
                font-size: 1.5rem;
                padding: 0.75rem;
            }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.table { color:#e2e8f0 !important; border-color:rgba(255,255,255,.12) !important; --bs-table-bg:transparent !important; --bs-table-color:#e2e8f0 !important; }
.accordion-header { background:transparent !important; }