:root {
    --primary: #0891b2;
    --accent: #0ea5e9;
    --bg: #ecfeff;
    --text: #083344;
    --light-line: #c8e9f2;
    --card-bg: #ffffff;
    --radius: 8px;
    --shadow: 0 4px 12px rgba(8, 145, 178, 0.08);
  }
  html { scroll-behavior: smooth; }
  body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Inter', system-ui, sans-serif;
    line-height: 1.8;
    font-weight: 400;
    letter-spacing: 0.01em;
    overflow-x: hidden;
  }
  h1,h2,h3,h4,h5,.navbar-brand {
    font-weight: 800;
    letter-spacing: -0.01em;
    color: #0b3446;
  }
  h2 { font-size: 2rem; }
  .navbar {
    background: rgba(236, 254, 255, 0.85);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--light-line);
    padding: 0.8rem 0;
  }
  .navbar-brand {
    font-size: 1.6rem;
    font-weight: 900;
    display: flex;
    align-items: center;
    gap: 0.4rem;
  }
  .navbar-brand i { color: var(--accent); }
  .nav-link {
    font-weight: 500;
    color: var(--text) !important;
    margin: 0 0.5rem;
    transition: color 0.2s;
    border-radius: 20px;
  }
  .nav-link:hover { color: var(--primary) !important; }
  .btn-outline-accent {
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: 30px;
    font-weight: 600;
  }
  .btn-outline-accent:hover {
    background: var(--accent);
    color: white;
  }
  .hero-section {
    position: relative;
    background: linear-gradient(145deg, #e2f6fb 0%, #f0fcff 100%);
    padding: 6rem 0 5rem;
    overflow: hidden;
    border-bottom: 1px solid var(--light-line);
    isolation: isolate;
  }
  .hero-section::before {
    content: '';
    position: absolute;
    inset: -10% -20% -20% -10%;
    background-image: url('{随机图片}');
    background-size: cover;
    background-position: center 30%;
    opacity: 0.18;
    z-index: -1;
    animation: parallaxShift 20s ease-out infinite alternate;
    transform: scale(1.1);
  }
  @keyframes parallaxShift {
    0% { transform: scale(1.1) translateY(0); }
    100% { transform: scale(1.2) translateY(-2%); }
  }
  .hero-content {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
  }
  .hero-title {
    font-size: 3.4rem;
    font-weight: 900;
    line-height: 1.15;
    color: #0b3d4e;
    text-shadow: 0 2px 10px rgba(0,0,0,0.02);
    min-height: 4.5rem;
  }
  .typed-cursor {
    display: inline-block;
    width: 3px;
    background: var(--accent);
    margin-left: 5px;
    animation: blink 0.8s step-end infinite;
  }
  @keyframes blink { 50% { opacity: 0; } }
  .hero-sub {
    font-size: 1.2rem;
    color: #1a5a6b;
    font-weight: 400;
    margin-top: 1.2rem;
  }
  .hero-cta {
    margin-top: 2.5rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
  }
  .section {
    padding: 4.5rem 0;
  }
  .section-label {
    display: inline-block;
    background: rgba(14, 165, 233, 0.1);
    color: var(--primary);
    font-weight: 600;
    border-radius: 30px;
    padding: 0.2rem 1.2rem;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
  }
  .steps-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.8rem;
  }
  .step-item {
    background: white;
    border-radius: var(--radius);
    padding: 2rem 1.5rem;
    flex: 1 1 180px;
    max-width: 210px;
    border: 1px solid var(--light-line);
    box-shadow: var(--shadow);
    transition: all 0.2s;
  }
  .step-item:hover { transform: translateY(-5px); border-color: var(--accent); }
  .step-num {
    font-family: 'JetBrains Mono', 'Inter', monospace;
    font-size: 2.2rem;
    font-weight: 300;
    color: var(--accent);
    line-height: 1;
    display: block;
    margin-bottom: 0.8rem;
  }
  .grid-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--light-line);
    padding: 1.8rem 1.2rem;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    height: 100%;
    transition: all 0.2s;
    overflow: hidden;
    position: relative;
  }
  .grid-card:hover { border-color: var(--accent); box-shadow: 0 8px 20px rgba(8,145,178,0.1); }
  .grid-card i {
    font-size: 2.4rem;
    color: var(--primary);
    margin-bottom: 0.8rem;
  }
  .grid-card h5 { font-weight: 700; margin-top: 0.5rem; }
  .grid-card p { color: #45636e; font-size: 0.95rem; margin-bottom: 0; }
  .card-image-wrap {
    width: 100%;
    height: 140px;
    overflow: hidden;
    border-radius: 6px;
    margin-bottom: 1rem;
    background: #d6edf2;
  }
  .card-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
  }
  .grid-card:hover .card-image-wrap img { transform: scale(1.06); }
  .overlay-text {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: linear-gradient(0deg, rgba(8,145,178,0.85), transparent);
    color: white;
    padding: 1.5rem 1rem 0.8rem;
    opacity: 0;
    transition: opacity 0.3s;
    font-weight: 600;
    font-size: 0.9rem;
  }
  .grid-card:hover .overlay-text { opacity: 1; }
  .long-article {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: 12px;
    border: 1px solid var(--light-line);
    max-width: 900px;
    margin: 0 auto;
    box-shadow: 0 2px 15px rgba(0,0,0,0.02);
  }
  .long-article p { color: #1d4d5c; }
  .faq-item {
    background: white;
    border-radius: var(--radius);
    padding: 1.2rem 1.5rem;
    border: 1px solid var(--light-line);
    margin-bottom: 0.8rem;
    box-shadow: none;
  }
  .faq-question { font-weight: 600; font-size: 1.1rem; color: #084c5c; }
  .faq-answer { color: #345d69; margin-top: 0.3rem; }
  .cta-box {
    background: linear-gradient(120deg, #0e7490, #0891b2);
    color: white;
    border-radius: 16px;
    padding: 3rem 2rem;
    text-align: center;
  }
  .cta-box h2 { color: white; }
  .cta-box .btn-light { border-radius: 40px; padding: 0.6rem 2rem; font-weight: 600; }
  .friend-links {
    border-top: 1px solid var(--light-line);
    background: rgba(255,255,255,0.4);
  }
  footer {
    background: #0b3d4e;
    color: #b6e3ef;
    padding: 2rem 0;
  }
  footer a { color: #c0e8f2; text-decoration: none; }
  .number-counter { font-family: 'JetBrains Mono', monospace; font-size: 2rem; font-weight: 500; color: var(--primary); }
  @media (max-width: 768px) {
    .hero-title { font-size: 2.2rem; }
    .hero-section { padding: 4rem 0 3rem; }
    .steps-container { flex-direction: column; align-items: center; }
    .navbar-collapse { background: rgba(236,254,255,0.98); border-radius: 8px; padding: 1rem; margin-top: 0.5rem; }
  }

/* --- 子页面追加 --- */
/* 关于页专属微调 —— 与首页风格完全一致,仅补充个别组件细节 */
        .about-hero {
            background: linear-gradient(135deg, var(--bg) 0%, #d8f3fa 100%);
            border-bottom: 1px solid var(--light-line);
            padding: 5rem 0 3.5rem;
        }
.about-hero .hero-title {
            margin-bottom: 0.75rem;
        }
.about-hero .hero-sub {
            max-width: 720px;
            margin: 0 auto 1.5rem;
            font-size: 1.1rem;
            line-height: 1.8;
            color: var(--text);
            opacity: 0.85;
        }
.about-meta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem 2.5rem;
            justify-content: center;
            margin-top: 1.25rem;
            color: var(--text);
            font-size: 0.95rem;
            font-weight: 500;
        }
.about-meta-row i {
            color: var(--primary);
            margin-right: 0.35rem;
        }
.about-section {
            padding: 4rem 0;
        }
.about-section.alt-bg {
            background: rgba(8, 145, 178, 0.03);
            border-top: 1px solid var(--light-line);
            border-bottom: 1px solid var(--light-line);
        }
.about-card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.75rem;
            margin-top: 2.5rem;
        }
.about-card-item {
            background: var(--card-bg);
            border: 1px solid var(--light-line);
            border-radius: var(--radius);
            padding: 1.75rem 1.5rem;
            box-shadow: var(--shadow);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
.about-card-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(8, 145, 178, 0.15);
        }
.about-card-item .icon-circle {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg);
            color: var(--primary);
            font-size: 1.25rem;
            margin-bottom: 1rem;
            border: 1px solid var(--light-line);
        }
.about-card-item h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.6rem;
        }
.about-card-item p {
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text);
            opacity: 0.8;
            margin-bottom: 0;
        }
.timeline-wrap {
            margin-top: 2.5rem;
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
        }
.timeline-item {
            display: flex;
            gap: 1.25rem;
            align-items: flex-start;
        }
.timeline-dot {
            flex-shrink: 0;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--primary);
            border: 3px solid var(--bg);
            box-shadow: 0 0 0 2px var(--primary);
            margin-top: 0.4rem;
        }
.timeline-content {
            flex: 1;
        }
.timeline-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.25rem;
        }
.timeline-content p {
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text);
            opacity: 0.8;
            margin-bottom: 0.5rem;
        }
.timeline-year {
            font-weight: 800;
            color: var(--primary);
            margin-right: 0.5rem;
        }
.about-cta {
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius);
            padding: 3rem 2rem;
            text-align: center;
            margin: 3rem 0 0;
        }
.about-cta h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            color: #fff;
        }
.about-cta p {
            font-size: 1.05rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 1.5rem;
            color: #fff;
        }
.about-cta .btn-outline-accent {
            border-color: #fff;
            color: #fff;
        }
.about-cta .btn-outline-accent:hover {
            background: #fff;
            color: var(--primary);
        }
/* 页脚区域保持与首页一致 */
        .footer-links a {
            color: var(--text);
            opacity: 0.75;
            text-decoration: none;
            margin: 0 0.75rem;
            font-size: 0.9rem;
        }
.footer-links a:hover {
            opacity: 1;
            color: var(--primary);
        }

/* --- 子页面追加 --- */
/* 本页专属少量样式 —— 条款页排版优化 */
        .terms-hero {
            background: linear-gradient(135deg, var(--bg) 0%, #d7f3fb 100%);
            border-bottom: 1px solid var(--light-line);
        }
.terms-section {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 2rem 2rem 1.5rem;
            margin-bottom: 1.8rem;
            border: 1px solid var(--light-line);
        }
.terms-section h2 {
            color: var(--primary);
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 1.2rem;
            padding-bottom: 0.6rem;
            border-bottom: 2px solid var(--light-line);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
.terms-section h2 i {
            color: var(--accent);
            font-size: 1.2rem;
        }
.terms-section h3 {
            color: var(--text);
            font-size: 1.1rem;
            font-weight: 600;
            margin-top: 1.4rem;
            margin-bottom: 0.6rem;
        }
.terms-section p, .terms-section li {
            color: var(--text);
            line-height: 1.8;
            font-size: 0.95rem;
        }
.terms-section ul {
            padding-left: 1.2rem;
            margin-bottom: 1rem;
        }
.terms-section ul li {
            margin-bottom: 0.4rem;
            position: relative;
        }
.terms-section ul li::marker {
            color: var(--accent);
        }
.terms-highlight {
            background: var(--bg);
            border-left: 4px solid var(--accent);
            padding: 0.8rem 1rem;
            border-radius: 0 var(--radius) var(--radius) 0;
            margin: 1.2rem 0;
            font-size: 0.95rem;
        }
.terms-date {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            font-size: 0.8rem;
            margin-bottom: 0.5rem;
        }
.terms-toc {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 1.2rem 1.5rem;
            margin-bottom: 2rem;
            border: 1px solid var(--light-line);
        }
.terms-toc a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            display: inline-block;
            margin: 0.2rem 1rem 0.2rem 0;
        }
.terms-toc a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
.terms-section {
                padding: 1.5rem 1rem 1rem;
            }
.terms-section h2 {
                font-size: 1.2rem;
            }

/* --- 子页面追加 --- */
.disclaimer-hero { background: linear-gradient(135deg, var(--bg) 0%, #f0f9ff 100%); padding: 80px 0 40px; border-bottom: 1px solid var(--light-line); }
.disclaimer-hero h1 { font-weight: 800; color: var(--primary); margin-bottom: 16px; }
.disclaimer-hero p { color: var(--text); font-size: 1.05rem; max-width: 720px; }
.legal-section { padding: 48px 0; border-bottom: 1px solid var(--light-line); }
.legal-section:last-of-type { border-bottom: none; }
.legal-section h2 { color: var(--primary); font-weight: 700; font-size: 1.5rem; margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }
.legal-section h2 i { font-size: 1.2rem; }
.legal-section p, .legal-section li { color: var(--text); line-height: 1.8; font-size: 0.98rem; }
.legal-section ul { padding-left: 20px; margin-bottom: 16px; }
.legal-section li { margin-bottom: 8px; }
.legal-section .note-box { background: var(--card-bg); border: 1px solid var(--light-line); border-radius: var(--radius); padding: 20px 24px; margin: 20px 0; box-shadow: var(--shadow); }
.legal-section .note-box p { margin-bottom: 8px; }
.legal-section .note-box p:last-child { margin-bottom: 0; }
.highlight-accent { color: var(--accent); font-weight: 600; }
.last-updated { color: #64748b; font-size: 0.9rem; margin-top: 24px; }