/* ==========================================
   CSS 变量 - 深色主题配色
   ========================================== */
:root {
    /* 深色主题色 */
    --bg-primary: #0a0a0a;
    --bg-secondary: #111111;
    --bg-tertiary: #1a1a1a;
    --bg-elevated: #1e1e1e;
    
    /* 文字色 */
    --text-primary: #e5e5e5;
    --text-secondary: #a0a0a0;
    --text-tertiary: #6b6b6b;
    --text-inverse: #0a0a0a;
    
    /* 品牌色 - 简洁现代 */
    --accent-primary: #ffffff;
    --accent-secondary: #3b82f6;
    --accent-hover: #f5f5f5;
    
    /* 边框色 */
    --border-primary: #2a2a2a;
    --border-secondary: #1f1f1f;
    --border-focus: #3b82f6;
    
    /* 状态色 */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* 动画 */
    --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 字体 */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

/* ==========================================
   全局样式
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ==========================================
   导航栏
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-primary);
    z-index: 1000;
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-actions {
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    color: var(--accent-primary);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-item {
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.nav-item:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--accent-primary);
    color: var(--text-inverse);
    margin-left: var(--spacing-sm);
}

.nav-cta:hover {
    background: var(--accent-hover);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.mobile-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition);
    border-radius: 2px;
}

.mobile-cta-btn {
    display: none;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    height: 40px;
    padding: 0 var(--spacing-md);
    background: var(--accent-primary);
    color: #1f1f1f;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
    transition: all var(--transition);
}

.mobile-cta-btn:hover {
    background: var(--accent-hover);
    transform: translateX(2px);
}

.mobile-cta-text {
    font-size: 0.875rem;
}

.mobile-cta-btn i {
    font-size: 14px;
}

/* ==========================================
   英雄区域
   ========================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 64px;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-lg);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-2xl);
}

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

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-primary);
}

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

.hero-decoration {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    overflow: hidden;
    opacity: 0.03;
}

.decoration-grid {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--border-primary) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-primary) 1px, transparent 1px);
    background-size: 50px 50px;
}

/* ==========================================
   按钮
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.875rem 1.75rem;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent-primary);
    color: var(--text-inverse);
}

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

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

.btn-secondary:hover {
    background: var(--bg-elevated);
    border-color: var(--border-focus);
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.0625rem;
}

.btn-block {
    width: 100%;
    margin-top: var(--spacing-lg);
}

/* ==========================================
   区块样式
   ========================================== */
.section {
    padding: var(--spacing-3xl) 0;
    position: relative;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   特色功能卡片
   ========================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    transition: all var(--transition-slow);
}

.feature-card:hover {
    border-color: var(--border-focus);
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    font-size: 1.25rem;
    color: var(--text-primary);
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   资源分类
   ========================================== */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.category-card {
    padding: var(--spacing-xl);
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    transition: all var(--transition-slow);
}

.category-card:hover {
    border-color: var(--border-focus);
}

.category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.category-header i {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.category-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.category-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tag {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.tag:hover {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border-color: var(--border-primary);
}

/* ==========================================
   功能列表
   ========================================== */
.function-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.function-item {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-slow);
}

.function-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-focus);
}

.function-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    color: var(--text-primary);
}

.function-content {
    flex: 1;
}

.function-title {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.function-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ==========================================
   价格表
   ========================================== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto;
}

.pricing-card {
    position: relative;
    padding: var(--spacing-2xl);
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    transition: all var(--transition-slow);
}

.pricing-card:hover {
    transform: translateY(-4px);
}

.pricing-featured {
    border-color: var(--border-focus);
    background: var(--bg-secondary);
}

.pricing-badge {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gradient-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-md);
}

.pricing-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.pricing-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    font-size: 1.75rem;
    color: var(--text-primary);
}

.pricing-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.pricing-price {
    margin-top: var(--spacing-md);
}

.price-amount {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.pricing-features {
    display: grid;
    gap: var(--spacing-md);
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.pricing-features i {
    font-size: 0.875rem;
    color: var(--success);
}

.pricing-features li.disabled i {
    color: var(--error);
}

/* ==========================================
   安全保障
   ========================================== */
.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.security-item {
    padding: var(--spacing-xl);
    text-align: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    transition: all var(--transition-slow);
}

.security-item:hover {
    border-color: var(--border-focus);
    transform: translateY(-4px);
}

.security-item i {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.security-item h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.security-item p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

/* ==========================================
   CTA区域
   ========================================== */
.cta-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    border-bottom: 1px solid var(--border-primary);
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.cta-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* ==========================================
   页脚
   ========================================== */
.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    background: var(--bg-primary);
    border-top: 1px solid var(--border-primary);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.footer-tagline {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.footer-description {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    line-height: 1.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-column ul {
    display: grid;
    gap: var(--spacing-sm);
}

.footer-column a {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    transition: color var(--transition);
}

.footer-column a:hover {
    color: var(--text-primary);
}

.footer-column li {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.footer-link {
    color: var(--text-secondary);
    transition: color var(--transition);
}

.footer-link:hover {
    color: var(--text-primary);
}

/* ==========================================
   返回顶部
   ========================================== */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-focus);
    transform: translateY(-4px);
}

/* ==========================================
   响应式设计
   ========================================== */
@media (max-width: 768px) {
    .nav-actions {
        display: flex;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .mobile-cta-btn {
        display: flex;
    }
    
    .nav-right {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        padding: var(--spacing-lg);
        background: var(--bg-secondary);
        border-bottom: 1px solid var(--border-primary);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-slow);
    }
    
    .nav-right.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-item {
        width: 100%;
        text-align: center;
        padding: var(--spacing-md);
    }
    
    .nav-cta {
        margin-left: 0;
        margin-top: var(--spacing-sm);
    }
    
    .hero-stats {
        flex-direction: row;
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    .stat-item {
        flex: 0 0 calc(50% - var(--spacing-md) / 2);
        min-width: 0;
    }
    
    .stat-divider {
        display: none;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .feature-card {
        padding: var(--spacing-lg);
    }
    
    .feature-icon {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
    
    .feature-title {
        font-size: 1rem;
    }
    
    .feature-description {
        font-size: 0.875rem;
    }
    
    .categories-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .function-list {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .function-item {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-lg);
    }
    
    .function-number {
        font-size: 1.5rem;
    }
    
    .function-title {
        font-size: 0.9rem;
    }
    
    .function-description {
        font-size: 0.8rem;
    }
    
    .security-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .security-item {
        padding: var(--spacing-lg);
    }
    
    .security-icon {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
    
    .security-item h3 {
        font-size: 1rem;
    }
    
    .security-item p {
        font-size: 0.875rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
}

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

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bg-tertiary);
}

/* ==========================================
   选择文本样式
   ========================================== */
::selection {
    background: var(--accent-secondary);
    color: white;
}

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

/* ==========================================
   页面头部
   ========================================== */
.page-header {
    padding: calc(var(--spacing-3xl) + 64px) 0 var(--spacing-2xl);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    text-align: center;
}

.page-header-content {
    max-width: 700px;
    margin: 0 auto;
}

.page-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--text-primary);
}

.page-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.page-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

/* ==========================================
   内容包装器
   ========================================== */
.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

/* ==========================================
   FAQ样式
   ========================================== */
.faq-grid {
    display: grid;
    gap: var(--spacing-xl);
}

.faq-category {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.faq-category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-primary);
}

.faq-category-header i {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.faq-category-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.faq-item {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-secondary);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
}

.faq-question i {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.faq-question h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ==========================================
   帮助横幅
   ========================================== */
.help-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    margin-top: var(--spacing-2xl);
}

.help-banner-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.help-banner-content i {
    font-size: 2.5rem;
    color: var(--text-primary);
}

.help-banner-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.help-banner-content p {
    color: var(--text-secondary);
}

.help-banner-actions {
    display: flex;
    gap: var(--spacing-md);
}

/* ==========================================
   用户手册样式
   ========================================== */
.guide-grid {
    display: grid;
    gap: var(--spacing-xl);
}

.guide-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.guide-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-primary);
}

.guide-header i {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.guide-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.guide-content {
    padding: var(--spacing-lg);
}

.guide-content h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.guide-content h3:first-child {
    margin-top: 0;
}

.guide-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

.guide-content ul {
    list-style: disc;
    padding-left: var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.8;
}

.guide-content ul li {
    margin-bottom: 0.5rem;
}

.guide-content a {
    color: var(--accent-secondary);
}

.guide-content a:hover {
    text-decoration: underline;
}

/* ==========================================
   技术支持样式
   ========================================== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.contact-card {
    position: relative;
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    text-align: center;
}

.contact-card.highlight {
    border-color: var(--accent-secondary);
    background: var(--bg-tertiary);
}

.vip-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    padding: 0.25rem 0.75rem;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    border-radius: var(--radius-md);
}

.contact-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--text-primary);
}

.contact-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.contact-card > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.contact-info {
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    text-align: left;
}

.contact-info p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.contact-info p:last-child {
    margin-bottom: 0;
}

.contact-info strong {
    color: var(--text-primary);
}

.support-content {
    display: grid;
    gap: var(--spacing-2xl);
}

.support-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
}

.support-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.support-header i {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.support-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

.support-item h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.support-item h3 i {
    font-size: 0.875rem;
    color: var(--success);
}

.support-item ul {
    list-style: none;
    padding-left: var(--spacing-lg);
}

.support-item li {
    position: relative;
    padding-left: var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 0.5rem;
}

.support-item li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--text-tertiary);
}

.timeline {
    display: grid;
    gap: var(--spacing-lg);
}

.timeline-item {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
}

.timeline-item.highlight {
    border-color: var(--accent-secondary);
    background: var(--bg-tertiary);
}

.timeline-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.timeline-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0.25rem;
}

.timeline-content strong {
    color: var(--text-primary);
}

.tips-list {
    display: grid;
    gap: var(--spacing-md);
}

.tip-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
}

.tip-item i {
    flex-shrink: 0;
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-top: 0.25rem;
}

.tip-item h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.tip-item p {
    color: var(--text-secondary);
    line-height: 1.7;
}

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

.schedule-item {
    padding: var(--spacing-lg);
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
}

.schedule-item.highlight {
    border-color: var(--accent-secondary);
    background: var(--bg-tertiary);
}

.schedule-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.schedule-item p {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.schedule-item .note {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-top: var(--spacing-sm);
}

/* ==========================================
   反馈页面样式
   ========================================== */
.feedback-types {
    margin-bottom: var(--spacing-2xl);
}

.feedback-types h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.feedback-type-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
}

.feedback-type-card {
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition);
}

.feedback-type-card:hover {
    border-color: var(--border-focus);
    transform: translateY(-4px);
}

.feedback-type-card i {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.feedback-type-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.feedback-type-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.feedback-form-demo {
    margin-bottom: var(--spacing-2xl);
}

.feedback-form-demo h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.form-tips {
    display: grid;
    gap: var(--spacing-lg);
}

.form-tip {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
}

.tip-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
}

.tip-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.tip-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.tip-content ul {
    list-style: disc;
    padding-left: var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.8;
}

.feedback-examples {
    margin-bottom: var(--spacing-2xl);
}

.feedback-examples h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.example-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.example-item {
    position: relative;
    padding: var(--spacing-lg);
    border: 2px solid;
    border-radius: var(--radius-lg);
}

.example-item.good {
    background: rgba(16, 185, 129, 0.05);
    border-color: var(--success);
}

.example-item.bad {
    background: rgba(239, 68, 68, 0.05);
    border-color: var(--error);
}

.example-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.example-badge.good {
    background: var(--success);
    color: white;
}

.example-badge.bad {
    background: var(--error);
    color: white;
}

.example-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.example-content {
    font-size: 0.9375rem;
}

.example-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.example-content strong {
    color: var(--text-primary);
}

.example-content ul {
    list-style: none;
    padding-left: var(--spacing-md);
    margin: var(--spacing-sm) 0;
}

.example-content li {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 0.25rem;
}

.process-section {
    margin-bottom: var(--spacing-2xl);
}

.process-section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.process-timeline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-xl);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
}

.process-step {
    flex: 1;
    text-align: center;
}

.process-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.process-step h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.process-step p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.time-label {
    display: inline-block;
    margin-top: var(--spacing-xs);
    padding: 0.25rem 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.process-arrow {
    font-size: 1.25rem;
    color: var(--text-tertiary);
    padding: 0 var(--spacing-md);
}

.scenarios-section {
    margin-bottom: var(--spacing-2xl);
}

.scenarios-section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.scenario-card {
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
}

.scenario-card h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.scenario-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.scenario-card ul {
    list-style: disc;
    padding-left: var(--spacing-lg);
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.8;
}

.feedback-notice {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.feedback-notice i {
    flex-shrink: 0;
    font-size: 1.5rem;
    color: var(--accent-secondary);
    margin-top: 0.25rem;
}

.feedback-notice h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.feedback-notice ul {
    list-style: disc;
    padding-left: var(--spacing-lg);
    color: var(--text-secondary);
    line-height: 1.8;
}

.submit-section {
    text-align: center;
}

.submit-note {
    margin-top: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* ==========================================
   法律文档样式
   ========================================== */
.legal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
}

.legal-section {
    margin-bottom: var(--spacing-2xl);
}

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

.legal-section h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.legal-section h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.legal-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.legal-section ul,
.legal-section ol {
    padding-left: var(--spacing-xl);
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.legal-section li {
    margin-bottom: 0.5rem;
}

.legal-section strong {
    color: var(--text-primary);
}

.legal-meta {
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.legal-meta p {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-bottom: 0.5rem;
}

.legal-meta p:last-child {
    margin-bottom: 0;
}

.legal-meta strong {
    color: var(--text-secondary);
}

/* ==========================================
   文章资讯样式
   ========================================== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.article-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-slow);
}

.article-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-focus);
}

.article-link {
    display: block;
    padding: var(--spacing-xl);
    color: inherit;
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.article-date {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.article-date i {
    font-size: 0.75rem;
}

.article-tag {
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.article-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-excerpt {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-footer {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-secondary);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--accent-secondary);
    transition: all var(--transition);
}

.article-card:hover .read-more {
    gap: var(--spacing-sm);
}

.read-more i {
    font-size: 0.875rem;
}

/* 文章内页样式 */
.article-header {
    padding: calc(var(--spacing-3xl) + 64px) 0 var(--spacing-2xl);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
}

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

.article-category {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.article-header h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.article-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) 0;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.article-info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.article-info-item i {
    font-size: 0.875rem;
}

.article-body {
    max-width: 800px;
    margin: 0 auto;
}

.article-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    line-height: 1.8;
}

.article-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: var(--spacing-xl) 0 var(--spacing-md);
}

.article-content h2:first-child {
    margin-top: 0;
}

.article-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.article-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.article-content ul,
.article-content ol {
    padding-left: var(--spacing-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.article-content li {
    margin-bottom: 0.5rem;
}

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

.article-content a {
    color: var(--accent-secondary);
    text-decoration: underline;
}

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

.article-content blockquote {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-tertiary);
    border-left: 4px solid var(--accent-secondary);
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
    color: var(--text-secondary);
}

.article-content code {
    padding: 0.25rem 0.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-primary);
}

.article-content pre {
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: var(--spacing-md) 0;
}

.article-content pre code {
    padding: 0;
    background: none;
    border: none;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--border-primary);
    margin-top: var(--spacing-xl);
}

.article-tag-item {
    padding: 0.375rem 0.875rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.article-tag-item:hover {
    background: var(--bg-elevated);
    border-color: var(--border-focus);
    color: var(--text-primary);
}

/* ==========================================
   响应式调整
   ========================================== */
@media (max-width: 768px) {
    .help-banner {
        flex-direction: column;
        text-align: center;
    }
    
    .help-banner-content {
        flex-direction: column;
        text-align: center;
    }
    
    .help-banner-actions {
        width: 100%;
        flex-direction: column;
    }
    
    .help-banner-actions .btn {
        width: 100%;
    }
    
    .process-timeline {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .process-arrow {
        transform: rotate(90deg);
    }
    
    .example-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid,
    .support-list,
    .schedule,
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
}