/* 基础样式 */
    :root {
        --primary-color: #0B3C5D;
        --secondary-color: #1D7087;
        --accent-color: #4DA1A9;
        --light-color: #E8F1F2;
        --dark-accent: #1C2541;
        --warning-color: #E54B4B;
        --success-color: #2B9348;
        --grid-gap: 20px;
        --card-radius: 8px;
        --transition-normal: all 0.3s ease;
    }
    
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }
    
    body {
        font-family: 'Lato', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        line-height: 1.6;
        color: #333;
        background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
        padding: 0;
        overflow-x: hidden;
    }
    
    /* 排版 */
    h1, h2, h3, h4, h5, h6 {
        font-family: 'Roboto', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        font-weight: 700;
        margin-bottom: 1rem;
        color: var(--primary-color);
    }
    
    h1 {
        font-size: 2.5rem;
        background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
        margin-bottom: 1.5rem;
    }
    
    h2 {
        font-size: 2rem;
        position: relative;
        padding-bottom: 0.5rem;
    }
    
    h2::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 80px;
        height: 3px;
        background: linear-gradient(to right, var(--accent-color), var(--secondary-color));
        border-radius: 3px;
    }
    
    h3 {
        font-size: 1.5rem;
        color: var(--secondary-color);
    }
    
    p {
        margin-bottom: 1.2rem;
        font-size: 1rem;
        line-height: 1.7;
    }
    
    /* 容器 */
    .container {
        width: 100%;
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 20px;
    }
    
    /* 头部样式 */
    header {
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
        color: white;
        padding: 20px 0;
        position: relative;
        overflow: hidden;
    }
    
    header::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.05)"/></svg>');
        background-size: cover;
    }
    
    .header-content {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        text-align: center;
        min-height: 350px;
        position: relative;
        z-index: 2;
    }
    
    .logo {
        max-width: 180px;
        margin-bottom: 20px;
        animation: float 6s ease-in-out infinite;
    }
    
    @keyframes float {
        0% { transform: translateY(0px); }
        50% { transform: translateY(-10px); }
        100% { transform: translateY(0px); }
    }
    
    .header-subtitle {
        font-size: 1.2rem;
        max-width: 700px;
        margin-bottom: 30px;
        color: var(--light-color);
    }
    
    /* 网格布局 */
    .grid {
        display: grid;
        grid-template-columns: repeat(12, 1fr);
        gap: var(--grid-gap);
        margin: 40px 0;
    }
    
    /* 卡片样式 */
    .card {
        background: white;
        border-radius: var(--card-radius);
        padding: 25px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        transition: var(--transition-normal);
        height: 100%;
    }
    
    .card:hover {
        transform: translateY(-5px);
        box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    }
    
    .card-title {
        color: var(--primary-color);
        font-size: 1.25rem;
        margin-bottom: 15px;
        display: flex;
        align-items: center;
    }
    
    .card-icon {
        margin-right: 10px;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
        color: white;
        font-size: 1.2rem;
    }
    
    /* 特性部分 */
    .features-section {
        padding: 60px 0;
        background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    }
    
    .feature-card {
        grid-column: span 4;
        text-align: center;
        padding: 30px 20px;
    }
    
    @media (max-width: 968px) {
        .feature-card {
            grid-column: span 6;
        }
    }
    
    @media (max-width: 576px) {
        .feature-card {
            grid-column: span 12;
        }
    }
    
    .feature-icon {
        width: 80px;
        height: 80px;
        margin: 0 auto 20px;
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 2rem;
        color: white;
    }
    
    /* 动态安全层演示 */
    .security-layer {
        background: linear-gradient(135deg, var(--dark-accent) 0%, var(--primary-color) 100%);
        color: white;
        padding: 30px;
        border-radius: var(--card-radius);
        text-align: center;
        position: relative;
        overflow: hidden;
        margin: 40px 0;
    }
    
    .security-layer::before {
        content: '';
        position: absolute;
        top: -10px;
        left: -10px;
        right: -10px;
        bottom: -10px;
        background: linear-gradient(45deg, var(--primary-color), transparent, var(--primary-color));
        z-index: 0;
        animation: glowing 3s linear infinite;
        opacity: 0.3;
    }
    
    @keyframes glowing {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }
    
    .shield-icon {
        font-size: 3rem;
        margin-bottom: 15px;
        display: block;
    }
    
    .security-layer p {
        margin-bottom: 20px;
        position: relative;
        z-index: 1;
    }
    
    .security-layer progress {
        width: 100%;
        height: 12px;
        border-radius: 6px;
        background-color: rgba(255, 255, 255, 0.2);
        position: relative;
        z-index: 1;
    }
    
    .security-layer progress::-webkit-progress-bar {
        background-color: rgba(255, 255, 255, 0.2);
        border-radius: 6px;
    }
    
    .security-layer progress::-webkit-progress-value {
        background: linear-gradient(to right, var(--success-color), var(--accent-color));
        border-radius: 6px;
    }
    
    /* 主题选项 */
    .theme-options {
        display: flex;
        flex-wrap: wrap;
        gap: 15px;
        margin: 20px 0;
    }
    
    .theme-option {
        display: flex;
        align-items: center;
        background: white;
        padding: 10px 15px;
        border-radius: 20px;
        box-shadow: 0 3px 6px rgba(0, 0, 0, 0.1);
    }
    
    /* 设备适配表格 */
    table {
        width: 100%;
        border-collapse: collapse;
        margin: 20px 0;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        border-radius: var(--card-radius);
        overflow: hidden;
    }
    
    thead {
        background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
        color: white;
    }
    
    th, td {
        padding: 12px 15px;
        text-align: left;
        border-bottom: 1px solid #ececec;
    }
    
    tbody tr:hover {
        background-color: rgba(77, 161, 169, 0.05);
    }
    
    /* 功能亮点 */
    .feature-highlight {
        background: white;
        padding: 30px;
        border-radius: var(--card-radius);
        margin: 30px 0;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    }
    
    .highlight-item {
        margin-bottom: 20px;
        padding-bottom: 20px;
        border-bottom: 1px solid #ececec;
    }
    
    .highlight-item:last-child {
        margin-bottom: 0;
        padding-bottom: 0;
        border-bottom: none;
    }
    
    /* 加载动画 */
    .spinner-container {
        text-align: center;
        margin: 30px 0;
    }
    
    @keyframes loading {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }
    
    .spinner {
        border: 4px solid #f3f3f3;
        border-top: 4px solid var(--secondary-color);
        border-radius: 50%;
        width: 40px;
        height: 40px;
        animation: loading 1s linear infinite;
        margin: 0 auto;
    }
    
    /* 用户评价 */
    .testimonials {
        padding: 60px 0;
        background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    }
    
    .testimonial-card {
        grid-column: span 6;
        padding: 30px;
        background: white;
        border-radius: var(--card-radius);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        position: relative;
    }
    
    @media (max-width: 768px) {
        .testimonial-card {
            grid-column: span 12;
        }
    }
    
    .testimonial-card::before {
        content: '"';
        position: absolute;
        top: 10px;
        left: 20px;
        font-size: 5rem;
        color: rgba(29, 112, 135, 0.1);
        font-family: serif;
        line-height: 1;
    }
    
    .testimonial-text {
        font-style: italic;
        margin-bottom: 20px;
        padding-left: 40px;
    }
    
    .testimonial-author {
        font-weight: bold;
        color: var(--secondary-color);
    }
    
    /* 响应式图片库 */
    .image-gallery {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 20px;
        margin: 40px 0;
    }
    
    .gallery-item {
        border-radius: var(--card-radius);
        overflow: hidden;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        position: relative;
        transition: var(--transition-normal);
    }
    
    .gallery-item:hover {
        transform: scale(1.03);
        box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
    }
    
    .gallery-item img {
        width: 100%;
        height: auto;
        display: block;
        transition: var(--transition-normal);
    }
    
    .gallery-item:hover img {
        transform: scale(1.1);
    }
    
    /* 页脚样式 */
    footer {
        background: linear-gradient(135deg, var(--dark-accent) 0%, var(--primary-color) 100%);
        color: white;
        padding: 60px 0 30px;
        margin-top: 60px;
    }
    
    .footer-grid {
        display: grid;
        grid-template-columns: repeat(12, 1fr);
        gap: var(--grid-gap);
    }
    
    .footer-col {
        grid-column: span 4;
    }
    
    @media (max-width: 768px) {
        .footer-col {
            grid-column: span 6;
        }
    }
    
    @media (max-width: 576px) {
        .footer-col {
            grid-column: span 12;
        }
    }
    
    .footer-title {
        color: white;
        margin-bottom: 20px;
        font-size: 1.2rem;
    }
    
    .footer-links {
        list-style: none;
    }
    
    .footer-links li {
        margin-bottom: 10px;
    }
    
    .footer-links a {
        color: rgba(255, 255, 255, 0.7);
        text-decoration: none;
        transition: color 0.3s ease;
    }
    
    .footer-links a:hover {
        color: white;
    }
    
    .copyright {
        text-align: center;
        padding-top: 30px;
        margin-top: 30px;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        color: rgba(255, 255, 255, 0.7);
        font-size: 0.9rem;
    }
    
    /* 代码样式 */
    pre {
        background-color: var(--dark-accent);
        color: #f8f8f2;
        padding: 20px;
        border-radius: var(--card-radius);
        overflow-x: auto;
        margin: 20px 0;
        position: relative;
    }
    
    code {
        font-family: 'Source Code Pro', monospace;
        font-size: 0.9rem;
        line-height: 1.5;
    }
    
    pre::before {
        content: 'Code';
        position: absolute;
        top: 0;
        right: 0;
        background: var(--secondary-color);
        color: white;
        padding: 4px 8px;
        font-size: 0.7rem;
        border-radius: 0 var(--card-radius) 0 var(--card-radius);
    }
    
    /* 自适应调整 */
    @media (max-width: 1200px) {
        .container {
            padding: 0 40px;
        }
    }
    
    @media (max-width: 992px) {
        h1 {
            font-size: 2.2rem;
        }
        
        h2 {
            font-size: 1.8rem;
        }
        
        h3 {
            font-size: 1.4rem;
        }
    }
    
    @media (max-width: 768px) {
        .header-content {
            min-height: 300px;
        }
        
        h1 {
            font-size: 2rem;
        }
        
        h2 {
            font-size: 1.6rem;
        }
    }
    
    @media (max-width: 576px) {
        .container {
            padding: 0 20px;
        }
        
        .header-content {
            min-height: 250px;
        }
        
        h1 {
            font-size: 1.8rem;
        }
        
        h2 {
            font-size: 1.4rem;
        }
        
        h3 {
            font-size: 1.2rem;
        }
    }
    
    /* 悬浮按钮动画 */
    .btn {
        display: inline-block;
        padding: 12px 24px;
        background: linear-gradient(to right, var(--secondary-color), var(--accent-color));
        color: white;
        border-radius: 30px;
        text-decoration: none;
        font-weight: bold;
        letter-spacing: 0.5px;
        transition: var(--transition-normal);
        box-shadow: 0 4px 10px rgba(77, 161, 169, 0.3);
    }
    
    .btn:hover {
        transform: translateY(-3px);
        box-shadow: 0 6px 15px rgba(77, 161, 169, 0.4);
        background: linear-gradient(to right, var(--accent-color), var(--secondary-color));
    }
    
    /* 警告样式容器 */
    .warning-box {
        background-color: rgba(229, 75, 75, 0.1);
        border-left: 4px solid var(--warning-color);
        padding: 15px;
        border-radius: 0 var(--card-radius) var(--card-radius) 0;
        margin: 20px 0;
    }
    
    /* 隐私政策样式 */
    .privacy-summary {
        background-color: rgba(11, 60, 93, 0.05);
        padding: 25px;
        border-radius: var(--card-radius);
        margin: 30px 0;
        border: 1px solid rgba(11, 60, 93, 0.1);
    }
    
    /* 文章样式 */
    .article {
        padding: 40px;
        background: white;
        border-radius: var(--card-radius);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        margin: 30px 0;
    }
    
    .article h2 {
        margin-top: 0;
    }
    
    .article h3 {
        margin-top: 30px;
    }
    
    .article ul, .article ol {
        margin-left: 20px;
        margin-bottom: 20px;
    }
    
    .article li {
        margin-bottom: 10px;
    }
    
    .article table {
        width: 100%;
        margin: 20px 0;
    }
    
    /* 设计提示横幅 */
    .design-notice {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        background-color: var(--primary-color);
        color: white;
        padding: 10px 0;
        text-align: center;
        z-index: 1000;
        font-size: 0.9rem;
    }
    
    /* 水波纹动画 */
    .ripple {
        position: absolute;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.4);
        transform: scale(0);
        animation: ripple 1s linear;
    }
    
    @keyframes ripple {
        to {
            transform: scale(4);
            opacity: 0;
        }
    }