:root {
    --primary: #0891b2;
    --accent: #0ea5e9;
    --bg: #ecfeff;
    --text: #083344;
    --text-light: #155e75;
    --border-color: #083344;
    --shadow: 8px 8px 0px 0px rgba(8, 51, 68, 0.9);
    --shadow-sm: 4px 4px 0px 0px rgba(8, 51, 68, 0.7);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    border-radius: 0 !important;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    line-height: 1.8;
    overflow-x: hidden;
}

/* 几何背景装饰 */
.geo-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}
.geo-circle {
    position: absolute;
    width: 180px;
    height: 180px;
    border: 6px solid var(--primary);
    opacity: 0.08;
    top: 8%;
    left: 5%;
}
.geo-square {
    position: absolute;
    width: 120px;
    height: 120px;
    background: var(--accent);
    opacity: 0.06;
    bottom: 12%;
    right: 8%;
}
.geo-triangle {
    position: absolute;
    width: 0;
    height: 0;
    border-left: 80px solid transparent;
    border-right: 80px solid transparent;
    border-bottom: 140px solid var(--primary);
    opacity: 0.05;
    top: 60%;
    left: 15%;
    transform: rotate(15deg);
}
.geo-small-square {
    position: absolute;
    width: 60px;
    height: 60px;
    background: var(--text);
    opacity: 0.05;
    top: 20%;
    right: 15%;
}

/* 导航 */
.navbar-custom {
    background: rgba(236, 254, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 4px solid var(--border-color);
    padding: 1rem 0;
}
.navbar-brand-custom {
    font-weight: 900;
    font-size: 2rem;
    letter-spacing: -1px;
    color: var(--text);
    text-decoration: none;
    transition: all 0.2s ease;
}
.navbar-brand-custom:hover {
    color: var(--primary);
}
.nav-link-custom {
    font-weight: 600;
    color: var(--text) !important;
    margin: 0 0.75rem;
    padding: 0.35rem 0 !important;
    border-bottom: 3px solid transparent;
    transition: all 0.2s ease;
    font-size: 1rem;
}
.nav-link-custom:hover {
    border-bottom-color: var(--primary);
    color: var(--primary) !important;
}
.navbar-toggler {
    border: 3px solid var(--border-color);
    padding: 0.25rem 0.5rem;
}
.navbar-toggler:focus {
    box-shadow: none;
}

/* Hero */
.hero-section {
    padding: 120px 0 80px;
    text-align: center;
    position: relative;
}
.hero-badge {
    display: inline-block;
    background: var(--text);
    color: var(--bg);
    padding: 0.5rem 1.5rem;
    font-weight: 700;
    font-size: 0.9rem;
    letter-spacing: 1px;
    margin-bottom: 2rem;
    text-transform: uppercase;
}
.hero-title {
    font-size: clamp(2.8rem, 6vw, 5rem);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    color: var(--text);
}
.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto 2.5rem;
    font-weight: 400;
}
.btn-custom {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    padding: 1rem 2.5rem;
    text-decoration: none;
    border: 4px solid var(--border-color);
    box-shadow: var(--shadow);
    transition: all 0.2s ease;
    font-size: 1.1rem;
    margin: 0 0.5rem 1rem;
}
.btn-custom:hover {
    transform: translate(3px, 3px);
    box-shadow: 2px 2px 0px 0px rgba(8, 51, 68, 0.9);
    color: #fff;
    background: var(--accent);
}
.btn-outline-custom {
    background: transparent;
    color: var(--text);
    border-color: var(--border-color);
    box-shadow: var(--shadow-sm);
}
.btn-outline-custom:hover {
    background: var(--text);
    color: var(--bg);
}

/* 打字机 */
.typewriter-container {
    display: inline-block;
}
.typewriter-text {
    overflow: hidden;
    white-space: nowrap;
    border-right: 4px solid var(--primary);
    animation: typing 3.5s steps(20, end) forwards, blink-caret 0.75s step-end infinite;
    max-width: 0;
    animation-fill-mode: forwards;
}
@keyframes typing {
    0% { max-width: 0; }
    100% { max-width: 100%; }
}
@keyframes blink-caret {
    0%, 100% { border-color: transparent; }
    50% { border-color: var(--primary); }
}

/* 区块通用 */
.section-block {
    padding: 80px 0;
}
.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text);
    position: relative;
    display: inline-block;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 6px;
    background: var(--primary);
}
.section-subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
    margin-bottom: 3rem;
    max-width: 600px;
}
.text-center .section-title::after {
    left: 50%;
    transform: translateX(-50%);
}
.text-center .section-subtitle {
    margin-left: auto;
    margin-right: auto;
}

/* 对比表格 */
.compare-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    box-shadow: var(--shadow);
    border: 4px solid var(--border-color);
}
.compare-table th,
.compare-table td {
    border: 3px solid var(--border-color);
    padding: 1.2rem 1.5rem;
    text-align: center;
    font-weight: 500;
}
.compare-table thead th {
    background: var(--text);
    color: var(--bg);
    font-weight: 700;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.compare-table .highlight-col {
    background: rgba(8, 145, 178, 0.08);
}
.compare-table .fa-check {
    color: var(--primary);
    font-size: 1.3rem;
}
.compare-table .fa-xmark {
    color: #ef4444;
    font-size: 1.3rem;
}
.compare-table tbody tr:last-child td {
    border-bottom: none;
}

/* 特色卡片 */
.feature-card {
    background: #fff;
    border: 4px solid var(--border-color);
    box-shadow: var(--shadow);
    padding: 2rem;
    height: 100%;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    opacity: 0;
    transform: translateY(40px);
}
.feature-card.visible {
    opacity: 1;
    transform: translateY(0);
}
.feature-card:hover {
    transform: scale(1.02) !important;
    border-color: var(--accent);
    box-shadow: 12px 12px 0px 0px rgba(14, 165, 233, 0.6);
}
.feature-card .icon-wrapper {
    width: 70px;
    height: 70px;
    background: var(--bg);
    border: 4px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    color: var(--primary);
}
.feature-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
}
.feature-card p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.7;
    margin: 0;
}

/* 步骤条 */
.steps-wrapper {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}
.steps-wrapper::before {
    content: '';
    position: absolute;
    left: 35px;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary);
    opacity: 0.2;
}
.step-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    position: relative;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.step-item.visible {
    opacity: 1;
    transform: translateY(0);
}
.step-number {
    width: 70px;
    height: 70px;
    min-width: 70px;
    background: var(--primary);
    color: #fff;
    border: 4px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    font-weight: 800;
    z-index: 1;
}
.step-content {
    padding-top: 0.3rem;
}
.step-content h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}
.step-content p {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.8;
    max-width: 500px;
}

/* FAQ */
.faq-wrapper {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    background: #fff;
    border: 4px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
    transition: box-shadow 0.3s ease;
}
.faq-item:hover {
    box-shadow: var(--shadow);
}
.faq-question {
    padding: 1.2rem 1.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    user-select: none;
    background: rgba(8, 145, 178, 0.04);
}
.faq-question .fa-chevron-down {
    transition: transform 0.3s ease;
    color: var(--primary);
}
.faq-item.active .fa-chevron-down {
    transform: rotate(180deg);
}
.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    color: var(--text-light);
    line-height: 1.8;
}
.faq-item.active .faq-answer {
    padding: 0 1.5rem 1.2rem;
    max-height: 300px;
}

/* CTA */
.cta-section {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}
.cta-box {
    background: var(--text);
    color: var(--bg);
    border: 4px solid var(--text);
    box-shadow: var(--shadow);
    padding: 4rem 3rem;
    text-align: center;
    position: relative;
    z-index: 1;
}
.cta-box h2 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
}
.cta-box p {
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}
.cta-box .btn-custom {
    background: var(--accent);
    border-color: #fff;
    color: #fff;
}
.cta-box .btn-custom:hover {
    background: #fff;
    color: var(--text);
}

/* 友情链接 */
.friend-links {
    background: #fff;
    border-top: 4px solid var(--border-color);
    border-bottom: 4px solid var(--border-color);
    padding: 40px 0;
}
.friend-links h5 {
    font-weight: 800;
    font-size: 1.1rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}
.friend-links .friend-link-item {
    color: var(--text-light);
    text-decoration: none;
    display: inline-block;
    margin-right: 1.5rem;
    font-weight: 500;
    transition: color 0.2s ease;
}
.friend-links .friend-link-item:hover {
    color: var(--primary);
}

/* 页脚 */
.footer {
    background: var(--text);
    color: var(--bg);
    padding: 40px 0;
    text-align: center;
}
.footer .footer-brand {
    font-weight: 900;
    font-size: 2rem;
    color: #fff;
    margin-bottom: 0.5rem;
}
.footer p {
    opacity: 0.8;
    font-size: 0.9rem;
    margin: 0.3rem 0;
}
.footer a {
    color: var(--accent);
    text-decoration: none;
}
.footer a:hover {
    text-decoration: underline;
}

/* 滚动渐显 */
.reveal-block {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal-block.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式 */
@media (max-width: 768px) {
    .hero-section {
        padding: 80px 0 50px;
    }
    .section-block {
        padding: 60px 0;
    }
    .compare-table {
        font-size: 0.85rem;
    }
    .compare-table th,
    .compare-table td {
        padding: 0.8rem;
    }
    .feature-card {
        margin-bottom: 1.5rem;
    }
    .steps-wrapper::before {
        left: 25px;
    }
    .step-number {
        width: 50px;
        height: 50px;
        min-width: 50px;
        font-size: 1.2rem;
    }
    .step-item {
        gap: 1rem;
    }
    .cta-box {
        padding: 3rem 1.5rem;
    }
    .cta-box h2 {
        font-size: 1.8rem;
    }
}

@media (max-width: 576px) {
    .navbar-brand-custom {
        font-size: 1.5rem;
    }
    .hero-title {
        font-size: 2.2rem;
    }
    .compare-table {
        font-size: 0.75rem;
    }
    .compare-table th,
    .compare-table td {
        padding: 0.5rem;
    }
    .btn-custom {
        display: block;
        width: 100%;
        margin: 0.5rem 0;
    }
}

/* --- 子页面追加 --- */
/* 本页专属微调 —— 仅补充细节，不重复造轮子 */
        .about-hero {
            padding: 4rem 0 2.5rem;
        }
.about-section {
            padding: 3rem 0;
        }
.about-title {
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text);
        }
.about-subhead {
            color: var(--primary);
            font-weight: 600;
            font-size: 1.1rem;
            letter-spacing: 0.3px;
        }
.about-text {
            color: var(--text-light);
            line-height: 1.8;
        }
.feature-rule {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 1.2rem 0 1.8rem;
        }
.icon-circle {
            background: rgba(8, 145, 178, 0.08);
            border-radius: 50%;
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.2rem;
            margin-bottom: 1rem;
        }
.blueberry-card {
            background: var(--bg);
            border: 1px solid var(--border-color);
            border-radius: 1rem;
            padding: 1.8rem 1.5rem;
            box-shadow: var(--shadow-sm);
            height: 100%;
            transition: transform .2s ease;
        }
.blueberry-card:hover {
            transform: translateY(-3px);
        }
.stats-wrap {
            background: rgba(8, 145, 178, 0.04);
            border-radius: 1.5rem;
            padding: 2rem 1.5rem;
            border: 1px dashed var(--border-color);
        }
.stat-item {
            text-align: center;
            color: var(--text);
        }
.stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
        }
.stat-label {
            color: var(--text-light);
            font-size: .9rem;
            letter-spacing: .3px;
        }
.footer-link a {
            color: var(--text-light);
            text-decoration: none;
            margin-right: 1.5rem;
        }
.footer-link a:hover {
            color: var(--primary);
        }
/* 确保bootstrap不干扰 */
        .navbar, .navbar-brand, .nav-link {
            background: transparent !important;
            color: var(--text) !important;
        }
.nav-link-custom.active {
            color: var(--primary) !important;
            font-weight: 600;
        }

/* --- 子页面追加 --- */
/* 本页专属补充样式 */
        .disclaimer-section {
            padding: 3rem 0;
        }
.disclaimer-card {
            background: var(--bg);
            border: 2px solid var(--border-color);
            border-radius: 12px;
            padding: 2rem;
            margin-bottom: 1.5rem;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.3s ease;
        }
.disclaimer-card:hover {
            box-shadow: var(--shadow);
        }
.disclaimer-card h2 {
            color: var(--primary);
            font-weight: 700;
            font-size: 1.5rem;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
.disclaimer-card h2 i {
            font-size: 1.25rem;
            color: var(--accent);
        }
.disclaimer-card p, .disclaimer-card li {
            color: var(--text);
            line-height: 1.8;
            font-size: 0.95rem;
        }
.disclaimer-card ul {
            padding-left: 1.25rem;
            margin-bottom: 0.5rem;
        }
.disclaimer-card li {
            margin-bottom: 0.5rem;
        }
.disclaimer-highlight {
            background: rgba(14, 165, 233, 0.1);
            border-left: 4px solid var(--accent);
            padding: 1rem 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
.disclaimer-highlight p {
            margin-bottom: 0;
            font-weight: 500;
            color: var(--text-light);
        }
.disclaimer-meta {
            color: var(--text-light);
            font-size: 0.9rem;
            border-top: 1px solid rgba(8, 51, 68, 0.2);
            padding-top: 1.5rem;
            margin-top: 2rem;
            text-align: center;
        }
.disclaimer-meta i {
            color: var(--accent);
            margin-right: 0.5rem;
        }
.breadcrumb-area {
            background: var(--bg);
            padding: 1rem 0;
            border-bottom: 1px solid rgba(8, 51, 68, 0.1);
        }
.breadcrumb-area a {
            color: var(--primary);
            text-decoration: none;
        }
.breadcrumb-area a:hover {
            color: var(--accent);
        }
.breadcrumb-area .separator {
            color: var(--text-light);
            margin: 0 0.5rem;
        }
.last-updated {
            display: inline-block;
            background: rgba(8, 51, 68, 0.1);
            padding: 0.25rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 1.5rem;
        }
.disclaimer-card {
                padding: 1.5rem;
            }
.disclaimer-card h2 {
                font-size: 1.25rem;
            }

/* --- 子页面追加 --- */
.privacy-content {
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
        }
.privacy-section {
            background: rgba(255,255,255,0.85);
            border: 2px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: var(--shadow-sm);
        }
.privacy-section h2 {
            color: var(--primary);
            font-weight: 700;
            font-size: 1.6rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 12px;
            border-bottom: 3px solid var(--accent);
        }
.privacy-section h3 {
            color: var(--text);
            font-weight: 600;
            font-size: 1.2rem;
            margin-top: 20px;
            margin-bottom: 10px;
        }
.privacy-section p {
            color: var(--text-light);
            margin-bottom: 15px;
        }
.privacy-section ul {
            padding-left: 20px;
            margin-bottom: 15px;
        }
.privacy-section li {
            color: var(--text-light);
            margin-bottom: 8px;
        }
.privacy-badge {
            background: var(--primary);
            color: #fff;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 20px;
        }
.privacy-section {
                padding: 20px;
            }
.privacy-section h2 {
                font-size: 1.3rem;
            }

/* --- 子页面追加 --- */
/* 覆盖Bootstrap组件默认白底黑字——本页主要用栅格，但以防万一 */
        .card, .card-body, .card-header, .card-footer {
            background: var(--bg);
            color: var(--text);
            border-color: var(--border-color);
        }
.list-group-item {
            background: var(--bg);
            color: var(--text);
            border-color: var(--border-color);
        }
/* 导航高亮当前页 */
        .nav-link-custom.active {
            color: var(--primary) !important;
            font-weight: 700;
        }
/* 地图区块间距 */
        .sitemap-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }
.sitemap-grid { grid-template-columns: 1fr; }
.sitemap-card {
            background: rgba(236, 254, 255, 0.7);
            border: 2px solid var(--border-color);
            border-radius: 12px;
            padding: 1.25rem 1.5rem;
            box-shadow: var(--shadow-sm);
            transition: transform .2s;
        }
.sitemap-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
.sitemap-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: .75rem;
            border-left: 5px solid var(--accent);
            padding-left: .6rem;
        }
.sitemap-card ul {
            list-style: none;
            padding-left: 0;
            margin-bottom: .5rem;
        }
.sitemap-card li {
            margin-bottom: .4rem;
        }
.sitemap-card a {
            color: var(--text);
            text-decoration: none;
            font-weight: 500;
            border-bottom: 1px dashed var(--border-color);
            transition: color .15s;
        }
.sitemap-card a:hover {
            color: var(--primary);
            border-bottom-style: solid;
        }
.footer-links a {
            color: var(--text-light);
            text-decoration: none;
            margin: 0 .75rem;
            font-weight: 500;
        }
.footer-links a:hover { color: var(--primary); }
/* 小图标间距 */
        .sitemap-card i {
            color: var(--accent);
            margin-right: 6px;
            width: 1.2rem;
        }