/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3b82f6;
    --secondary-color: #10b981;
    --dark-color: #1f2937;
    --light-color: #f9fafb;
    --text-color: #374151;
    --border-color: #e5e7eb;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: 15px 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo {
    height: 40px;
    width: 40px;
    /* border-radius: 8px; */
}

.brand-name {
    font-size: 20px;
    font-weight: 600;
    color: var(--dark-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--dark-color);
    transition: all 0.3s;
}

/* 英雄区域 */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.btn-outline {
    border: 2px solid white;
    color: white;
}

.btn-outline:hover {
    background: white;
    color: var(--primary-color);
}

.hero-image .mockup {
    width: 100%;
    max-width: 500px;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
}

/* 功能区域 */
.features {
    padding: 80px 0;
    background: var(--light-color);
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-color);
    margin-bottom: 50px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.feature-card p {
    color: var(--text-color);
    line-height: 1.6;
}

/* 使用场景 */
.scenarios {
    padding: 80px 0;
}

.scenario-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.scenario-card {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.scenario-card:hover {
    transform: translateY(-5px);
}

.scenario-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.scenario-content {
    padding: 25px;
    background: white;
}

.scenario-content h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.scenario-content p {
    color: var(--text-color);
}

/* 下载区域 */
.download {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.download h2 {
    font-size: 36px;
    margin-bottom: 15px;
}

.download p {
    font-size: 18px;
    margin-bottom: 30px;
}

.qrcode-wrapper {
    display: inline-block;
    background: white;
    padding: 30px;
    border-radius: 16px;
    margin-bottom: 30px;
}

.qrcode {
    width: 200px;
    height: 200px;
    display: block;
}

.qrcode-tip {
    margin-top: 15px;
    color: var(--text-color);
    font-weight: 500;
}

.platform-info {
    font-size: 16px;
}

.platform-info p {
    margin: 10px 0;
}

/* 页脚 */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 18px;
    margin-bottom: 20px;
}

.footer-col ul {
    list-style: none;
}

.footer-col li {
    margin-bottom: 10px;
}

.footer-col a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-col a:hover {
    color: white;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    transition: background 0.3s;
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.2);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    margin: 5px 0;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
}

.footer-bottom a:hover {
    color: white;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .scenario-grid {
        grid-template-columns: 1fr;
    }
}

/* ==================== 补充样式 - 添加到 style.css 末尾 ==================== */

/* 页面头部通用样式 */
.page-header {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

/* 法律文档内容样式 */
.legal-content {
    padding: 60px 0;
    background: white;
}

.legal-section {
    margin-bottom: 50px;
}

.legal-section h2 {
    font-size: 28px;
    color: var(--dark-color);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.legal-section h3 {
    font-size: 20px;
    color: var(--dark-color);
    margin: 25px 0 15px;
}

.legal-section p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: var(--text-color);
}

.legal-section ul {
    margin: 15px 0;
    padding-left: 30px;
}

.legal-section li {
    margin-bottom: 10px;
    line-height: 1.8;
    color: var(--text-color);
}

.legal-section strong {
    color: var(--dark-color);
    font-weight: 600;
}

.legal-section a {
    color: var(--primary-color);
    text-decoration: none;
}

.legal-section a:hover {
    text-decoration: underline;
}

/* 关于页面样式 */
.about-content {
    padding: 60px 0;
}

.about-section {
    margin-bottom: 60px;
}

.about-section h2 {
    font-size: 32px;
    color: var(--dark-color);
    margin-bottom: 20px;
}

.about-section p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 15px;
}

.vision-list {
    list-style: none;
    padding: 0;
    margin: 20px 0;
}

.vision-list li {
    padding: 15px 0;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-color);
}

.vision-list strong {
    color: var(--dark-color);
}

/* 时间轴样式 */
.timeline {
    position: relative;
    padding: 20px 0;
    margin: 30px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 30px;
}

.timeline-dot {
    position: absolute;
    left: 11px;
    top: 5px;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 0 3px var(--border-color);
}

.timeline-content h3 {
    font-size: 20px;
    color: var(--dark-color);
    margin-bottom: 8px;
}

.timeline-content p {
    color: var(--text-color);
    line-height: 1.6;
}

.cta-text {
    margin-top: 30px;
}

/* 导航栏滚动效果 */
.navbar.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

/* 移动端导航菜单 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: left 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
        gap: 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        margin: 15px 0;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: #2563eb;
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
}

/* 淡入动画 */
.fade-in {
    animation: fadeInUp 0.6s ease-out forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* 图片占位符 */
img[data-src] {
    background: var(--light-color);
    min-height: 200px;
}

/* 选择文本颜色 */
::selection {
    background: var(--primary-color);
    color: white;
}

::-moz-selection {
    background: var(--primary-color);
    color: white;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--light-color);
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* 焦点样式 */
button:focus,
a:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 禁用状态 */
button:disabled,
input:disabled,
select:disabled,
textarea:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* 打印样式 */
@media print {
    .navbar,
    .footer,
    .back-to-top,
    .hero-buttons,
    .download {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
    }

    a {
        text-decoration: underline;
    }

    .container {
        max-width: 100%;
    }
}

/* 响应式图片 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 视频响应式 */
video {
    max-width: 100%;
    height: auto;
}

/* 表格响应式 */
@media (max-width: 768px) {
    table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
}

/* 小屏幕优化 */
@media (max-width: 480px) {
    .page-header h1 {
        font-size: 28px;
    }

    .section-title {
        font-size: 28px;
    }

    .hero-title {
        font-size: 28px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }

    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
    }
}

/* 横屏优化 */
@media (max-height: 600px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 100px 0 60px;
    }
}

/* 高分辨率屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* 可以在这里添加高分辨率图片 */
}

/* 深色模式支持（可选） */
@media (prefers-color-scheme: dark) {
    /* 如果需要支持深色模式，可以在这里添加相关样式 */
}

/* 动画偏好设置 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 辅助功能 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* 跳过导航链接 */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-to-content:focus {
    top: 0;
}