/* ==========================================================================
   页面统一样式文件 - page.css
   适用于: about.html, contact.html, help.html, help_article.html, privacy.html, terms.html
   ========================================================================== */

/* ==========================================================================
   CSS 变量定义
   ========================================================================== */
:root {
    --primary-color: #35be70;
    --primary-dark: #2da85f;
    --primary-light: #4cd585;
    --primary-gradient: linear-gradient(135deg, #35be70 0%, #2da85f 100%);
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
    --shadow-green: 0 8px 32px rgba(53, 190, 112, 0.15);
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
    --transition-bounce: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
}

/* ==========================================================================
   暗色模式
   ========================================================================== */
[data-theme="dark"] {
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --border-color: #334155;
    --border-light: #475569;
}

@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f8fafc;
        --text-secondary: #cbd5e1;
        --text-muted: #94a3b8;
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        --border-color: #334155;
        --border-light: #475569;
        --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.3);
    }
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--bg-secondary);
    min-height: 100vh;
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
    transition: var(--transition);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==========================================================================
   顶部导航栏
   ========================================================================== */
.top-nav {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 16px 0;
    transition: var(--transition);
}

[data-theme="dark"] .top-nav {
    background: rgba(15, 23, 42, 0.9);
}

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

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
}

.back-link:hover {
    color: var(--primary-color);
    background: rgba(53, 190, 112, 0.05);
    transform: translateX(-2px);
}

.nav-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.theme-toggle {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-bounce);
    color: var(--text-secondary);
}

.theme-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: scale(1.1) rotate(10deg);
}

/* ==========================================================================
   页面头部 (Hero Section & Page Header)
   ========================================================================== */
.hero-section,
.page-header {
    background: var(--primary-gradient);
    color: white;
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before,
.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="20" height="20" patternUnits="userSpaceOnUse"><circle cx="10" cy="10" r="1.2" fill="white" opacity="0.15"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
    opacity: 0.6;
}

.hero-content,
.header-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title,
.page-header h1 {
    font-size: 3.8rem;
    font-weight: 800;
    margin-bottom: 24px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    background: linear-gradient(45deg, #ffffff 0%, rgba(255, 255, 255, 0.9) 100%);
    background-clip: text;
    -webkit-background-clip: text;
}

.hero-subtitle,
.page-header p {
    font-size: 1.4rem;
    opacity: 0.95;
    font-weight: 400;
    margin-bottom: 32px;
    line-height: 1.6;
}

.last-updated {
    background: rgba(255, 255, 255, 0.15);
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    margin-top: 32px;
    display: inline-block;
    font-size: 0.95rem;
    backdrop-filter: blur(10px);
}

/* ==========================================================================
   主要内容
   ========================================================================== */
.main-content {
    padding: 80px 0;
}

.section {
    margin-bottom: 80px;
}

.section:last-child {
    margin-bottom: 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    margin-top: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ==========================================================================
   通用卡片和内容容器
   ========================================================================== */
.content-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transition: var(--transition);
}

.content-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.content-body {
    padding: 48px;
}

/* ==========================================================================
   特色功能卡片 (Features Cards)
   ========================================================================== */
.features-grid,
.categories-grid,
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    margin: 60px 0;
}

.feature-card,
.category-card,
.info-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 40px 32px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before,
.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover,
.category-card:hover,
.info-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.feature-card:hover::before,
.category-card:hover::before {
    transform: scaleX(1);
}

.feature-icon,
.category-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(53, 190, 112, 0.1) 0%, rgba(53, 190, 112, 0.2) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 2rem;
    color: var(--primary-color);
    transition: var(--transition-bounce);
}

.feature-card:hover .feature-icon,
.category-card:hover .category-icon {
    transform: scale(1.1) rotate(5deg);
    background: var(--primary-gradient);
    color: white;
}

.feature-title,
.category-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.feature-description,
.category-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

.category-count {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
}

/* ==========================================================================
   统计信息 (Stats)
   ========================================================================== */
.hero-stats,
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.stat-item,
.stat-card {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    transition: var(--transition);
}

.stat-card {
    background: var(--bg-primary);
    backdrop-filter: none;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    padding: 32px 24px;
}

.stat-item:hover,
.stat-card:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-4px);
}

.stat-card:hover {
    background: var(--bg-primary);
    box-shadow: var(--shadow-xl);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: white;
    font-size: 1.5rem;
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

/* ==========================================================================
   团队成员 (Team Members)
   ========================================================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin: 60px 0;
}

.team-member {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    text-align: center;
    transition: var(--transition);
}

.team-member:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.member-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 3rem;
    color: white;
    font-weight: 700;
    box-shadow: var(--shadow-green);
}

.member-name {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.member-role {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 16px;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.member-bio {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==========================================================================
   使命愿景 (Mission Vision)
   ========================================================================== */
.mission-vision {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 60px;
    margin: 60px 0;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

.mission-vision-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 48px;
}

.mission-item {
    text-align: center;
}

.mission-icon {
    width: 100px;
    height: 100px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 2.5rem;
    color: white;
    box-shadow: var(--shadow-green);
}

.mission-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.mission-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
}

/* ==========================================================================
   联系表单 (Contact Form)
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-bottom: 80px;
}

.contact-form-section {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

.form-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.form-subtitle {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 1.1rem;
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-control {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-primary);
    box-shadow: 0 0 0 3px rgba(53, 190, 112, 0.1);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
    padding-right: 48px;
}

.form-control.textarea {
    min-height: 120px;
    resize: vertical;
}

.submit-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 16px 32px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition-bounce);
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-green);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* ==========================================================================
   联系信息 (Contact Info)
   ========================================================================== */
.contact-info-section {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.info-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 32px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.info-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.info-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.info-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
}

.info-content {
    color: var(--text-secondary);
    line-height: 1.6;
}

.info-list {
    list-style: none;
    margin: 16px 0 0 0;
}

.info-list li {
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 12px;
}

.info-list i {
    color: var(--primary-color);
    width: 16px;
}

/* ==========================================================================
   搜索功能 (Search)
   ========================================================================== */
.search-container {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.search-box {
    position: relative;
    background: white;
    border-radius: var(--radius-lg);
    padding: 4px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

.search-input {
    width: 100%;
    padding: 20px 60px 20px 24px;
    border: none;
    outline: none;
    font-size: 1.1rem;
    border-radius: var(--radius-md);
    color: var(--text-primary);
    background: transparent;
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--radius-sm);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    transform: translateY(-50%) scale(1.05);
}

.search-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    margin-top: 8px;
    max-height: 300px;
    overflow-y: auto;
    z-index: 10;
    display: none;
}

.search-suggestion {
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-light);
    cursor: pointer;
    transition: var(--transition);
}

.search-suggestion:hover {
    background: var(--bg-tertiary);
}

.search-suggestion:last-child {
    border-bottom: none;
}

/* ==========================================================================
   快速标签 (Quick Tags)
   ========================================================================== */
.quick-tags {
    margin-top: 32px;
}

.quick-tags-title {
    font-size: 0.95rem;
    opacity: 0.9;
    margin-bottom: 16px;
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.tag {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.tag:hover {
    background: rgba(255, 255, 255, 0.25);
    color: white;
    transform: translateY(-2px);
}

/* ==========================================================================
   热门文章 (Popular Articles)
   ========================================================================== */
.popular-section {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 48px;
    margin-bottom: 80px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

.popular-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 32px;
    text-align: center;
}

.popular-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.popular-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    border: 2px solid transparent;
}

.popular-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary-color);
    color: inherit;
    text-decoration: none;
    transform: translateY(-2px);
}

.popular-number {
    background: var(--primary-gradient);
    color: white;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.popular-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    line-height: 1.4;
}

.popular-meta {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ==========================================================================
   最新文章 (Recent Articles)
   ========================================================================== */
.recent-section {
    margin-bottom: 60px;
}

.recent-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.recent-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
}

.recent-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    color: inherit;
    text-decoration: none;
}

.recent-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    flex-shrink: 0;
}

.recent-content h5 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    line-height: 1.4;
}

.recent-date {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ==========================================================================
   FAQ 常见问题
   ========================================================================== */
.faq-section {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    margin-top: 60px;
}

.faq-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 32px;
    text-align: center;
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.faq-item {
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 2px solid transparent;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.faq-question {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.faq-answer {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ==========================================================================
   目录导航 (TOC)
   ========================================================================== */
.toc-section {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    padding: 32px;
    border-bottom: 1px solid var(--border-light);
}

[data-theme="dark"] .toc-section {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.toc-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toc-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 12px;
    list-style: none;
}

.toc-item {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

[data-theme="dark"] .toc-item {
    background: var(--bg-primary);
}

.toc-link {
    display: block;
    padding: 16px 20px;
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
}

.toc-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.toc-item:hover .toc-link {
    color: var(--primary-color);
}

/* ==========================================================================
   面包屑导航 (Breadcrumb)
   ========================================================================== */
.breadcrumb-section {
    padding: 32px 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 0.9rem;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.breadcrumb-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
}

.breadcrumb-separator {
    color: var(--text-muted);
}

/* ==========================================================================
   文章内容 (Article Content)
   ========================================================================== */
.content-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 60px;
}

.article-content {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

.article-header {
    margin-bottom: 40px;
    padding-bottom: 32px;
    border-bottom: 2px solid var(--border-light);
}

.article-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.3;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 24px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-body {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4,
.article-body h5,
.article-body h6 {
    color: var(--text-primary);
    margin: 32px 0 16px 0;
    font-weight: 600;
}

.article-body h2 {
    font-size: 1.8rem;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--primary-color);
}

.article-body h3 {
    font-size: 1.5rem;
}

.article-body p {
    margin-bottom: 20px;
}

.article-body ul,
.article-body ol {
    margin: 20px 0;
    padding-left: 24px;
}

.article-body li {
    margin-bottom: 8px;
}

.article-body code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', Consolas, monospace;
    font-size: 0.9em;
    color: var(--primary-dark);
}

.article-body pre {
    background: var(--bg-tertiary);
    padding: 20px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 24px 0;
    border: 1px solid var(--border-color);
}

.article-body blockquote {
    background: rgba(53, 190, 112, 0.05);
    border-left: 4px solid var(--primary-color);
    padding: 16px 20px;
    margin: 24px 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: 24px 0;
    box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   侧边栏 (Sidebar)
   ========================================================================== */
.sidebar {
    position: sticky;
    top: 120px;
    height: fit-content;
}

.sidebar-section {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: 32px;
    margin-bottom: 32px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
}

.sidebar-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.related-list {
    list-style: none;
}

.related-item {
    margin-bottom: 16px;
}

.related-link {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    line-height: 1.5;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    border: 2px solid transparent;
}

.related-link:hover {
    color: var(--primary-color);
    background: rgba(53, 190, 112, 0.05);
    border-color: rgba(53, 190, 112, 0.2);
    text-decoration: none;
    transform: translateX(4px);
}

/* ==========================================================================
   通知样式 (Alerts)
   ========================================================================== */
.alert {
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
    border: 1px solid;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--success-color);
    color: var(--success-color);
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--error-color);
    color: var(--error-color);
}

.alert.hidden {
    display: none;
}

/* ==========================================================================
   高亮框和警告框 (Highlight & Warning Boxes)
   ========================================================================== */
.highlight-box {
    background: linear-gradient(135deg, rgba(53, 190, 112, 0.05) 0%, rgba(53, 190, 112, 0.1) 100%);
    border: 2px solid rgba(53, 190, 112, 0.2);
    border-radius: var(--radius-md);
    padding: 24px;
    margin: 32px 0;
    position: relative;
    overflow: hidden;
}

.highlight-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary-gradient);
}

.highlight-box h4 {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 12px;
    font-size: 1.2rem;
}

.warning-box {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.05) 0%, rgba(239, 68, 68, 0.1) 100%);
    border: 2px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-md);
    padding: 24px;
    margin: 32px 0;
    position: relative;
    overflow: hidden;
}

.warning-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
}

.warning-box h4 {
    color: #ef4444;
    font-weight: 700;
    margin-bottom: 12px;
    font-size: 1.2rem;
}

/* ==========================================================================
   CTA 和支持区域 (CTA & Support Sections)
   ========================================================================== */
.cta-section,
.support-section,
.contact-section {
    background: var(--primary-gradient);
    color: white;
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before,
.support-section::before,
.contact-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="dots" width="15" height="15" patternUnits="userSpaceOnUse"><circle cx="7.5" cy="7.5" r="0.8" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23dots)"/></svg>');
}

.contact-section {
    border-radius: var(--radius-lg);
    margin-top: 48px;
    padding: 48px;
}

.cta-content,
.support-content,
.contact-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
    margin: 0 auto;
}

.cta-title,
.support-title,
.contact-section h3 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.cta-description,
.support-subtitle,
.contact-section p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 40px;
    line-height: 1.6;
}

.cta-button,
.support-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: white;
    color: var(--primary-color);
    padding: 16px 32px;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: var(--transition-bounce);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.cta-button:hover,
.support-btn:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    color: var(--primary-color);
    text-decoration: none;
}

.support-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.support-btn.secondary {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    backdrop-filter: blur(10px);
}

.support-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    color: white;
}

.support-card {
    background: var(--primary-gradient);
    color: white;
    text-align: center;
}

.support-icon {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 1.5rem;
}

.support-card .sidebar-title {
    color: white;
}

.support-description {
    margin-bottom: 24px;
    opacity: 0.9;
    line-height: 1.6;
}

.support-button {
    background: white;
    color: var(--primary-color);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.support-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    color: var(--primary-color);
    text-decoration: none;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.15);
    padding: 16px 24px;
    border-radius: var(--radius-sm);
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

/* ==========================================================================
   文章反馈和导航 (Article Feedback & Navigation)
   ========================================================================== */
.article-footer {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 2px solid var(--border-light);
}

.feedback-section {
    margin-bottom: 40px;
}

.feedback-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.feedback-buttons {
    display: flex;
    gap: 16px;
}

.feedback-btn {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
}

.feedback-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    text-decoration: none;
}

.feedback-btn.positive:hover {
    background: #10b981;
    border-color: #10b981;
}

.feedback-btn.negative:hover {
    background: #ef4444;
    border-color: #ef4444;
}

.nav-buttons {
    display: flex;
    justify-content: space-between;
    gap: 16px;
}

.nav-btn {
    flex: 1;
    max-width: 300px;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    text-decoration: none;
    color: var(--text-secondary);
    transition: var(--transition);
    display: block;
}

.nav-btn:hover {
    border-color: var(--primary-color);
    background: rgba(53, 190, 112, 0.05);
    color: var(--text-primary);
    text-decoration: none;
    transform: translateY(-2px);
}

.nav-btn-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-btn-title {
    font-weight: 600;
    font-size: 1rem;
    line-height: 1.4;
}

/* ==========================================================================
   内容样式增强 (Content Style Enhancements)
   ========================================================================== */
.section-content {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.section-content p {
    margin-bottom: 20px;
}

.section-content ul,
.section-content ol {
    margin: 20px 0;
    padding-left: 24px;
}

.section-content li {
    margin-bottom: 12px;
    position: relative;
}

.section-content li::marker {
    color: var(--primary-color);
    font-weight: 600;
}

.section-content h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 32px 0 16px 0;
}

.info-card h5 {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ==========================================================================
   响应式设计
   ========================================================================== */
@media (max-width: 968px) {
    .contact-grid,
    .content-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    .hero-section,
    .page-header {
        padding: 80px 0;
    }

    .hero-title,
    .page-header h1 {
        font-size: 2.8rem;
    }

    .content-body {
        padding: 32px 24px;
    }

    .toc-section {
        padding: 24px;
    }

    .toc-list,
    .features-grid,
    .categories-grid,
    .team-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .mission-vision {
        padding: 40px 24px;
    }

    .mission-vision-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .section-title {
        font-size: 2rem;
    }

    .article-title {
        font-size: 2rem;
    }

    .cta-title,
    .support-title {
        font-size: 2rem;
    }

    .popular-grid,
    .faq-grid,
    .info-grid {
        grid-template-columns: 1fr;
    }

    .support-buttons {
        flex-direction: column;
        align-items: center;
    }

    .tags-list {
        justify-content: flex-start;
    }

    .nav-buttons {
        flex-direction: column;
    }

    .nav-btn {
        max-width: none;
    }

    .sidebar {
        position: static;
    }

    .breadcrumb {
        flex-wrap: wrap;
    }

    .contact-info {
        flex-direction: column;
        align-items: center;
    }

    .contact-section,
    .support-section {
        padding: 32px 24px;
    }

    .contact-form-section,
    .faq-section {
        padding: 32px 24px;
    }

    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    .nav-content {
        flex-wrap: wrap;
        gap: 12px;
    }

    .nav-actions {
        order: 3;
        width: 100%;
        justify-content: flex-end;
    }

    .lang-dropdown {
        right: 0;
    }
}

@media (max-width: 480px) {
    .hero-title,
    .page-header h1 {
        font-size: 2.2rem;
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

    .stat-item,
    .feature-card,
    .team-member {
        padding: 16px;
    }

    .mission-vision {
        padding: 32px 20px;
    }

    .content-body {
        padding: 24px 16px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .article-title {
        font-size: 1.8rem;
    }

    .article-content {
        padding: 24px 16px;
    }

    .sidebar-section {
        padding: 24px 20px;
    }

    .cta-title,
    .support-title {
        font-size: 1.8rem;
    }
}

/* ==========================================================================
   滚动行为和性能优化
   ========================================================================== */
html {
    scroll-behavior: smooth;
}

.feature-card,
.team-member,
.stat-item,
.category-card,
.info-card,
.toc-item,
.content-card,
.popular-item,
.recent-item,
.feedback-btn,
.nav-btn,
.related-link {
    will-change: transform;
}

/* ==========================================================================
   可访问性优化
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==========================================================================
   其他辅助样式
   ========================================================================== */
.highlight {
    background: rgba(53, 190, 112, 0.2);
    color: var(--primary-dark);
    padding: 2px 4px;
    border-radius: 4px;
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ==========================================================================
   打印样式
   ========================================================================== */
@media print {
    .top-nav,
    .toc-section,
    .cta-section,
    .support-section,
    .contact-section,
    .feedback-section,
    .nav-buttons,
    .sidebar {
        display: none !important;
    }

    .hero-section,
    .page-header {
        background: none !important;
        color: #000 !important;
    }

    .content-card {
        box-shadow: none;
        border: 1px solid #000;
    }

    .content-layout {
        grid-template-columns: 1fr;
    }
}


/* 语言选择器样式 */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.language-selector {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.lang-btn:hover {
    background: var(--bg-secondary);
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    min-width: 140px;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
}

.lang-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    font-size: 14px;
}

.lang-option:first-child {
    border-radius: 12px 12px 0 0;
}

.lang-option:last-child {
    border-radius: 0 0 12px 12px;
}

.lang-option:hover {
    background: var(--bg-secondary);
}

.lang-option .flag {
    font-size: 16px;
}

/* 过滤器区域 */
.filters-section {
    padding: 32px;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-bottom: 1px solid var(--border-light);
}

[data-theme="dark"] .filters-section {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.filters-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.filters-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.filter-label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.filter-select {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(53, 190, 112, 0.1);
    transform: translateY(-1px);
}

/* 现代化表格设计 */
.table-container {
    overflow: hidden;
}

.subscriptions-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

.subscriptions-table th {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 20px 24px;
    text-align: left;
    position: sticky;
    top: 0;
    z-index: 10;
}

.subscriptions-table th:first-child {
    border-top-left-radius: 0;
}

.subscriptions-table th:last-child {
    border-top-right-radius: 0;
}

.subscriptions-table td {
    padding: 24px;
    border-bottom: 1px solid var(--border-light);
    vertical-align: top;
    transition: var(--transition-fast);
}

.subscriptions-table tbody tr {
    transition: var(--transition);
    cursor: pointer;
}

.subscriptions-table tbody tr:hover {
    background: linear-gradient(135deg, rgba(53, 190, 112, 0.02) 0%, rgba(53, 190, 112, 0.05) 100%);
    transform: scale(1.005);
    box-shadow: inset 0 0 0 1px rgba(53, 190, 112, 0.1);
}

/* 现代化状态徽章 */
.status-badge,
.payment-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

.status-badge::before,
.payment-badge::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.status-badge:hover::before,
.payment-badge:hover::before {
    left: 100%;
}

.status-badge.active {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.status-badge.expired {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.status-badge.cancelled {
    background: linear-gradient(135deg, #6b7280 0%, #4b5563 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(107, 114, 128, 0.3);
}

.payment-badge.paid {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.payment-badge.pending {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.payment-badge.failed {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.payment-badge.refunded {
    background: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

/* 套餐徽章 */
.plan-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 16px;
    font-size: 13px;
    font-weight: 600;
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-green);
}

/* 价格和日期样式 */
.price-text {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 16px;
}

.date-text {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 400;
}

.date-highlight {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 15px;
}

.order-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.order-no {
    font-weight: 600;
    color: var(--text-primary);
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    font-size: 13px;
}

.plan-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

/* 操作按钮 */
.action-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.btn-action {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-bounce);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 12px rgba(53, 190, 112, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(53, 190, 112, 0.4);
    color: white;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* 现代化分页 */
.pagination-section {
    padding: 32px;
    border-top: 1px solid var(--border-light);
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

[data-theme="dark"] .pagination-section {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
}

.pagination-info {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

.pagination {
    display: flex;
    gap: 4px;
}

.page-btn {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    font-weight: 500;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.page-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.page-btn.active {
    background: var(--primary-gradient);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-green);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* 空状态设计 */
.empty-state {
    text-align: center;
    padding: 80px 32px;
    background: linear-gradient(135deg, #f8fafc 0%, white 100%);
}

[data-theme="dark"] .empty-state {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

.empty-icon {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 32px;
    font-size: 48px;
    color: var(--text-muted);
    position: relative;
    overflow: hidden;
}

.empty-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent 30%, rgba(53, 190, 112, 0.1) 50%, transparent 70%);
    transform: rotate(45deg);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
    100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.empty-state h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.empty-state p {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 32px;
}

.empty-action {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--primary-gradient);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: var(--transition-bounce);
    box-shadow: var(--shadow-green);
}

.empty-action:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(53, 190, 112, 0.4);
    color: white;
}

/* 加载状态 */
.loading-state {
    text-align: center;
    padding: 80px 32px;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-light);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 24px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 订阅页面响应式设计 */
@media (max-width: 768px) {
    .filters-section {
        padding: 24px;
    }

    .filters-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .subscriptions-table {
        font-size: 14px;
    }

    .subscriptions-table th,
    .subscriptions-table td {
        padding: 16px 12px;
    }

    .subscriptions-table th:nth-child(n+4),
    .subscriptions-table td:nth-child(n+4) {
        display: none;
    }

    .pagination-section {
        flex-direction: column;
        gap: 16px;
        padding: 24px;
    }

    .pagination {
        justify-content: center;
        flex-wrap: wrap;
    }

    .action-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn-action {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .subscriptions-table th:nth-child(n+3),
    .subscriptions-table td:nth-child(n+3) {
        display: none;
    }

    .plan-badge,
    .status-badge,
    .payment-badge {
        font-size: 11px;
        padding: 4px 8px;
    }

    .empty-icon {
        width: 80px;
        height: 80px;
        font-size: 32px;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    .subscriptions-table tbody tr:hover {
        transform: none;
    }

    .btn-action:hover,
    .page-btn:hover {
        transform: none;
    }
}

/* 高性能动画 */
.subscriptions-table tbody tr,
.btn-action,
.page-btn {
    will-change: transform;
}

/* 打印样式 */
@media print {
    .filters-section,
    .pagination-section,
    .action-buttons {
        display: none !important;
    }
}