/**
 * Google Ads 合规金融落地页主题样式
 * 响应式设计 + Core Web Vitals 优化
 */

/* ========================================
   1. 基础样式与重置
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
}

:root {
    /* 主题色 */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --secondary-hover: #475569;
    
    /* 文本色 */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #0f172a;
    
    /* 风险提示色 (高对比度) */
    --risk-bg: #fef2f2;
    --risk-border: #dc2626;
    --risk-text: #991b1b;
    
    /* 边框与阴影 */
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    --font-mono: "SF Mono", Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 容器 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

/* 链接 */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--primary-hover);
}

a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 标题 */
h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--spacing-sm) 0;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

/* ========================================
   2. 导航栏
   ======================================== */
.site-header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.navbar {
    padding: var(--spacing-sm) 0;
}

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

.navbar-brand .logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.navbar-brand .logo:hover {
    color: var(--primary-color);
}

.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.navbar-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.navbar-nav {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-md);
}

.navbar-nav a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.navbar-nav a:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.lang-switcher select {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 0.9rem;
}

/* 移动端导航 */
@media (max-width: 768px) {
    .navbar-toggle {
        display: flex;
    }
    
    .navbar-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        border-top: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        flex-direction: column;
        padding: var(--spacing-md);
        display: none;
    }
    
    .navbar-menu.active {
        display: flex;
    }
    
    .navbar-nav {
        flex-direction: column;
        width: 100%;
    }
    
    .navbar-nav a {
        display: block;
        padding: 0.75rem 1rem;
    }
}

/* ========================================
   3. 主内容区
   ======================================== */
.site-main {
    min-height: 60vh;
    padding: var(--spacing-xl) 0;
}

/* 首屏区域 */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: white;
}

.hero-description {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.hero-disclaimer {
    opacity: 0.9;
}

.hero-disclaimer a {
    color: white;
    text-decoration: underline;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    transition: all 0.2s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

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

/* 内容区域 */
.content-section {
    padding: var(--spacing-xl) 0;
}

/* 文章列表 */
.article-list {
    display: grid;
    gap: var(--spacing-lg);
}

.article-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-lg);
    transition: all 0.3s ease;
}

.article-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.article-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.article-title a {
    color: var(--text-primary);
}

.article-title a:hover {
    color: var(--primary-color);
}

.article-meta {
    display: flex;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.article-excerpt {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.read-more {
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* 特色区块 */
.features-section {
    background: var(--bg-secondary);
    padding: var(--spacing-xl) 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: var(--spacing-xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.feature-icon {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.feature-title {
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--text-secondary);
}

/* 单页内容 */
.content-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

@media (min-width: 1024px) {
    .content-wrapper {
        grid-template-columns: 2fr 1fr;
    }
}

.article-single, .page-single {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.article-single-title, .page-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.article-single-meta {
    display: flex;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.article-single-content, .page-content {
    font-size: 1.1rem;
    line-height: 1.8;
}

.article-single-content h2,
.page-content h2 {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

.article-single-content p,
.page-content p {
    margin-bottom: var(--spacing-md);
}

.article-tags {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: 20px;
    font-size: 0.9rem;
    margin: 0.25rem;
}

/* 侧边栏 */
.sidebar {
    position: relative;
}

.sidebar-sticky {
    position: sticky;
    top: 100px;
}

.widget {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: 12px;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.widget-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
}

.compliance-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.compliance-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.compliance-list li:last-child {
    border-bottom: none;
}

/* ========================================
   4. 风险披露区块 (高对比度)
   ======================================== */
.risk-disclosure {
    background: var(--risk-bg);
    border-top: 4px solid var(--risk-border);
    border-bottom: 4px solid var(--risk-border);
    padding: var(--spacing-lg) 0;
    margin: var(--spacing-xl) 0 0 0;
}

.risk-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--risk-text);
    margin-bottom: var(--spacing-md);
}

.icon-warning {
    flex-shrink: 0;
}

.risk-content {
    color: var(--risk-text);
    font-size: 0.95rem;
    line-height: 1.8;
}

.risk-content p {
    margin-bottom: var(--spacing-sm);
}

.risk-content p:last-child {
    margin-bottom: 0;
}

/* ========================================
   5. 页脚 (透明度信息)
   ======================================== */
.site-footer {
    background: var(--bg-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.site-footer .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
    color: white;
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.company-details p {
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.company-name strong,
.company-license strong {
    color: white;
}

.icon {
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-list,
.legal-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.contact-list li,
.legal-list li {
    margin-bottom: var(--spacing-sm);
}

.contact-list a,
.legal-list a {
    color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-list a:hover,
.legal-list a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.footer-bottom .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.copyright,
.powered-by {
    margin: 0;
    font-size: 0.9rem;
}

.powered-by a {
    color: rgba(255, 255, 255, 0.8);
}

/* ========================================
   6. 响应式设计
   ======================================== */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .article-single-title,
    .page-title {
        font-size: 1.75rem;
    }
    
    .site-footer .container {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom .container {
        flex-direction: column;
        text-align: center;
    }
}

/* ========================================
   7. 法律页面样式 (隐私政策 & 服务条款)
   ======================================== */

/* 法律页面容器 */
.legal-page {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

/* 页面头部 */
.legal-header {
    text-align: center;
    padding-bottom: var(--spacing-xl);
    border-bottom: 3px solid var(--primary-color);
    margin-bottom: var(--spacing-xl);
}

.legal-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.legal-icon {
    color: var(--primary-color);
    flex-shrink: 0;
}

.legal-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--spacing-md);
}

.legal-meta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.legal-date,
.legal-update {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* 目录导航 */
.legal-toc {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-xl);
    border-left: 4px solid var(--primary-color);
}

.legal-toc-title {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.legal-toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
}

.legal-toc-list li {
    margin: 0;
}

.legal-toc-list a {
    display: block;
    padding: 0.5rem;
    color: var(--text-secondary);
    border-radius: 4px;
    transition: all 0.2s ease;
    font-size: 0.95rem;
}

.legal-toc-list a:hover {
    background: var(--bg-primary);
    color: var(--primary-color);
    transform: translateX(4px);
}

/* 内容区域 */
.legal-content {
    line-height: 1.8;
    color: var(--text-primary);
}

/* 引言 */
.legal-intro {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: var(--spacing-lg);
    border-radius: 8px;
    margin-bottom: var(--spacing-xl);
    border-left: 4px solid var(--primary-color);
}

/* 内容区块 */
.legal-section {
    margin-bottom: var(--spacing-xl);
    scroll-margin-top: 100px; /* 锚点滚动偏移 */
}

.legal-section-title {
    font-size: 1.75rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.legal-subsection-title {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin: var(--spacing-lg) 0 var(--spacing-md) 0;
}

.legal-text {
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
    color: var(--text-primary);
}

.legal-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* 列表样式 */
.legal-list {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
    list-style: disc;
}

.legal-list li {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-xs);
}

.legal-list li strong {
    color: var(--primary-color);
}

/* 高亮区块 */
.legal-highlight {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: var(--spacing-md);
    border-radius: 4px;
    margin: var(--spacing-md) 0;
}

.legal-highlight strong {
    color: #856404;
}

/* 通知区块 */
.legal-notice {
    background: #e0f2fe;
    border-left: 4px solid #0284c7;
    padding: var(--spacing-md);
    border-radius: 4px;
    margin: var(--spacing-md) 0;
}

.legal-notice strong {
    color: #0369a1;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.legal-notice p {
    margin: 0;
    color: var(--text-primary);
}

/* 免责声明区块 */
.legal-disclaimer {
    background: var(--risk-bg);
    border: 2px solid var(--risk-border);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin: var(--spacing-md) 0;
}

.legal-disclaimer .legal-subsection-title {
    color: var(--risk-text);
    margin-top: 0;
}

.legal-disclaimer .legal-text,
.legal-disclaimer .legal-list {
    color: var(--risk-text);
}

.legal-warning {
    font-weight: 600;
    padding: var(--spacing-md);
    background: #fef2f2;
    border-radius: 6px;
    border-left: 4px solid var(--risk-border);
}

/* 联系方式区块 */
.legal-contact {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin: var(--spacing-md) 0;
}

.legal-contact p {
    margin: 0.5rem 0;
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.legal-contact strong {
    color: var(--primary-color);
    min-width: 100px;
}

.legal-contact a {
    color: var(--primary-color);
    text-decoration: underline;
}

/* 页脚 */
.legal-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--border-color);
}

.legal-footer-notice {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
}

.legal-footer-notice p {
    margin: 0.5rem 0;
}

.legal-footer-notice strong {
    color: var(--primary-color);
}

.legal-footer-meta {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.legal-footer-meta p {
    margin: 0.25rem 0;
}

/* 移动端法律页面优化 */
@media (max-width: 768px) {
    .legal-page {
        padding: var(--spacing-md);
    }
    
    .legal-title {
        font-size: 1.75rem;
        flex-direction: column;
    }
    
    .legal-icon {
        width: 40px;
        height: 40px;
    }
    
    .legal-meta {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .legal-toc-list {
        grid-template-columns: 1fr;
    }
    
    .legal-section-title {
        font-size: 1.5rem;
    }
    
    .legal-list {
        padding-left: var(--spacing-md);
    }
    
    .legal-contact strong {
        min-width: auto;
    }
    
    .legal-contact p {
        flex-direction: column;
        gap: 0.25rem;
    }
}

/* 打印样式 - 法律文档 */
@media print {
    .legal-page {
        box-shadow: none;
        padding: 0;
    }
    
    .legal-toc,
    .legal-icon {
        display: none;
    }
    
    .legal-section {
        page-break-inside: avoid;
    }
    
    .legal-notice,
    .legal-disclaimer,
    .legal-highlight {
        border: 1px solid #000;
    }
}

/* ========================================
   8. 性能优化 (Core Web Vitals)
   ======================================== */

/* 减少重绘 */
.btn,
.article-card,
.feature-card {
    will-change: transform;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 加载动画 */
@media (prefers-reduced-motion: no-preference) {
    * {
        scroll-behavior: smooth;
    }
}

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

/* ========================================
   9. 无障碍优化 (WCAG 2.1 AA)
   ======================================== */

/* 聚焦状态 */
*:focus-visible {
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

/* 跳转链接 (屏幕阅读器) */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 10000;
}

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

/* 触摸目标最小尺寸 (移动端) */
@media (max-width: 768px) {
    a, button, .btn {
        min-height: 44px;
        min-width: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }
    
    .navbar-nav a {
        min-height: 48px;
    }
}

/* ========================================
   10. 打印样式
   ======================================== */
@media print {
    .site-header,
    .site-footer,
    .hero-section,
    .features-section,
    .sidebar,
    .navbar-toggle,
    .lang-switcher {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
        color: #666;
    }
}