/* === 基础样式与变量 === */
:root {
    --primary: #0a84ff;
    --primary-dark: #0066cc;
    --primary-light: #3d9eff;
    --secondary: #ff375f;
    --secondary-dark: #e02d52;
    --success: #30d158;
    --warning: #ffd60a;
    --danger: #ff453a;
    --dark: #121212;
    --darker: #0a0a0a;
    --light: #f5f5f7;
    --gray: #8e8e93;
    --gray-light: #a0a0a5;
    --gray-dark: #5c5c60;
    --border: #2c2c2e;
    --card-bg: #1c1c1e;
    --card-bg-hover: #222225;
    --text: #ffffff;
    --text-secondary: #e5e5ea;
    --text-tertiary: #a0a0a5;

    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;

    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --radius-full: 50%;

    --transition: all 0.3s ease;
    --transition-fast: all 0.15s ease;
    --transition-slow: all 0.5s ease;
    --shadow: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.25);
    --shadow-inset: inset 0 2px 4px rgba(0,0,0,0.1);

    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
    --z-top: 9999;
}

/* 关键CSS优化 */
/* 优化关键渲染路径 */
html, body { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; background-color: var(--darker); color: var(--text); line-height: 1.6; overflow-x: hidden; }

/* 优化图片加载 */
img { max-width: 100%; height: auto; display: block; }

/* 优化字体加载 */
@font-face { font-display: swap; }

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gray-dark);
    border-radius: 4px;
}

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

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

/* 优化焦点样式性能 */
*:focus {
    outline-offset: 2px;
    transition: outline 0.2s ease;
}

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

/* 选择文本样式 */
::selection {
    background: rgba(10, 132, 255, 0.25);
    color: var(--text);
}

/* 加载动画 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

.slide-in {
    animation: slideIn 0.5s ease-in-out;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--darker);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

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

button {
    cursor: pointer;
    border: none;
    font-family: inherit;
    transition: var(--transition);
}

/* === 头部与导航 === */
.header {
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    border-bottom: 1px solid var(--border);
    padding: var(--spacing-sm) 0;
    transition: var(--transition);
}

.top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-transform: uppercase;
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.05);
}

.search-bar {
    display: flex;
    flex: 1;
    max-width: 500px;
    margin: 0 var(--spacing-lg);
}

.search-bar input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255,255,255,0.08);
    border: 1px solid var(--border);
    border-right: none;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    color: var(--text);
    font-size: 0.9rem;
    transition: var(--transition);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255,255,255,0.12);
}

.search-bar button {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary);
    color: white;
    border: 1px solid var(--primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-weight: 600;
    transition: var(--transition);
}

.search-bar button:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.subscribe-btn {
    background: var(--secondary);
    color: white;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: var(--transition);
    border: 1px solid transparent;
}

.subscribe-btn:hover {
    background: var(--secondary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(255, 55, 95, 0.4);
    border-color: var(--secondary-dark);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 25px;
    background: transparent;
    padding: 0;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--text);
    border-radius: 3px;
    transition: var(--transition);
}

.main-nav {
    transition: max-height 0.3s ease;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1400px;
    margin: 0 auto;
    overflow-x: auto;
}

.main-nav a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    position: relative;
    white-space: nowrap;
    transition: var(--transition);
}

.main-nav a:hover,
.main-nav .active a {
    color: var(--text);
}

.main-nav .active a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary);
    border-radius: 3px;
    transition: var(--transition);
}

/* === 主容器 === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-xl);
    /* 使用transform3d提升渲染性能 */
    transform: translateZ(0);
    will-change: transform;
}

/* 确保主要内容区域占据第一列 */
.hero-carousel,
.featured-section,
.standard-feed {
    grid-column: 1;
}

.sidebar {
    grid-column: 2;
}

/* === 轮播区 === */
.hero-carousel {
    grid-column: 1 / -1;
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    height: 420px;
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--spacing-xl);
    background: var(--card-bg);
}

.carousel-container {
    position: relative;
    height: 100%;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease, transform 0.8s ease;
    transform: translateX(100%);
    display: flex;
    align-items: flex-end;
}

.carousel-slide.active {
    opacity: 1;
    transform: translateX(0);
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.7);
}

.carousel-content {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: calc(var(--spacing-xl) * 1.5) var(--spacing-xl);
    background: linear-gradient(to top, rgba(0,0,0,0.85), transparent);
    color: white;
    z-index: 2;
}

.carousel-content h2 {
    font-size: 2.2rem;
    margin: var(--spacing-xs) 0 var(--spacing-sm) 0;
    line-height: 1.2;
    font-weight: 800;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.carousel-content p {
    font-size: 1.1rem;
    max-width: 700px;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

.carousel-controls {
    position: absolute;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-sm);
    z-index: 10;
}

.carousel-controls button {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.2);
    backdrop-filter: blur(10px);
    color: white;
    font-size: 1.1rem;
    border: 1px solid rgba(255,255,255,0.1);
    transition: var(--transition);
}

.carousel-controls button:hover {
    background: rgba(255,255,255,0.3);
    transform: scale(1.1);
}

.carousel-indicators {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--spacing-sm);
    z-index: 10;
}

.carousel-indicator {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.4);
    border: none;
    transition: var(--transition);
}

.carousel-indicator.active {
    background: white;
    transform: scale(1.2);
}

/* === 特色文章区 === */
.featured-section {
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.featured-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 1px solid var(--border);
}

.featured-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255,255,255,0.1);
}

.featured-card .card-image {
    height: 220px;
    position: relative;
    overflow: hidden;
}

.featured-card .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.featured-card:hover .card-image img {
    transform: scale(1.05);
}

.featured-card .card-content {
    padding: var(--spacing-md);
    flex: 1;
    /* display: flex; */
    flex-direction: column;
}

.featured-card h4 {
    font-size: 1.3rem;
    margin: var(--spacing-xs) 0 var(--spacing-sm) 0;
    line-height: 1.3;
    flex: 1;
}

.featured-card p {
    color: var(--text-secondary);

    flex: 1;
    line-height: 1.5;
}

.featured-card .meta {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: auto;
}

/* === 标准文章流 === */
.feed-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.news-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 1px solid var(--border);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255,255,255,0.1);
}

.news-card .card-image {
    height: 220px;
    position: relative;
    overflow: hidden;
}

.news-card .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-card:hover .card-image img {
    transform: scale(1.05);
}

.news-card .card-content {
    padding: var(--spacing-md);
    flex: 1;
    /* display: flex; */
    flex-direction: column;
}

.news-card h4 {
    font-size: 1.1rem;
    margin: var(--spacing-xs) 0 var(--spacing-sm) 0;
    line-height: 1.4;
    font-weight: 600;
    flex: 1;
}

.news-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
    flex: 1;
    line-height: 1.5;
}

.news-card .meta {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin-top: auto;
}

/* 特殊卡片类型 */
.news-card.no-image {
    background: var(--card-bg-hover);
    border: 1px solid var(--border);
}

.news-card.no-image .card-image {
    display: none;
}

.news-card.no-image .card-content {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-card.video .card-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.3);
}

.video-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 50px;
    height: 50px;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(5px);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
    z-index: 2;
    transition: var(--transition);
}

.news-card:hover .video-indicator {
    background: rgba(0,0,0,0.8);
    transform: translate(-50%, -50%) scale(1.1);
}

/* 类别标签 */
.category-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
    transition: var(--transition);
    border: 1px solid transparent;
}

.category-tag.tech { background: var(--primary); }
.category-tag.politics { background: var(--secondary); }
.category-tag.business { background: var(--success); }
.category-tag.science { background: #bf5af2; }
.category-tag.culture { background: var(--warning); }
.category-tag.health { background: #ff9f0a; }

.category-tag:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

/* 加载更多 */
.load-more {
    text-align: center;
    margin: var(--spacing-xl) 0;
}

.load-more button {
    background: var(--card-bg);
    color: var(--text);
    padding: 12px 32px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
}

.load-more button:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(10, 132, 255, 0.4);
}

.load-more button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* === 侧边栏 === */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.trending-widget,
.newsletter-widget,
.ad-widget {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.trending-widget:hover,
.newsletter-widget:hover,
.ad-widget:hover {
    box-shadow: var(--shadow);
    border-color: rgba(255,255,255,0.1);
}

.trending-widget h4,
.newsletter-widget h4 {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border);
}

.trending-widget ul {
    list-style: none;
}

.trending-widget li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border);
}

.trending-widget li:last-child {
    border-bottom: none;
}

.trending-widget a {
    color: var(--text-secondary);
    display: block;
    transition: var(--transition);
    padding: var(--spacing-xs) 0;
}

.trending-widget a:hover {
    color: var(--text);
    padding-left: var(--spacing-sm);
}

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

.newsletter-widget form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.newsletter-widget input {
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255,255,255,0.08);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    transition: var(--transition);
}

.newsletter-widget input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255,255,255,0.12);
}

.newsletter-widget button {
    background: var(--primary);
    color: white;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: var(--transition);
    border: 1px solid transparent;
}

.newsletter-widget button:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

.ad-widget .ad-placeholder {
    height: 250px;
    background: linear-gradient(135deg, var(--card-bg), var(--darker));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-weight: 600;
    border: 1px dashed var(--border);
    transition: var(--transition);
}

.ad-widget .ad-placeholder:hover {
    border-style: solid;
    border-color: var(--primary);
}

/* === 页脚 === */
.footer {
    background: var(--darker);

    padding: 10px;

}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-xl);
}

.footer-brand h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.footer-brand p {
    color: var(--text-secondary);
    max-width: 300px;
}

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
    grid-column: span 2;
}

.link-group h4 {
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.link-group ul {
    list-style: none;
}

.link-group li {
    margin-bottom: var(--spacing-sm);
}

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

.link-group a:hover {
    color: var(--text);
    text-decoration: underline;
}

.footer-bottom {
    max-width: 1400px;

    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    color: var(--text-secondary);
    font-size: 1rem;
    transition: var(--transition);

    border-radius: var(--radius-sm);
}

.social-links a:hover {
    color: var(--primary);
    transform: translateY(-3px);
    background: rgba(255,255,255,0.05);
}

/* === 移动端底部导航 === */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border);
    padding: var(--spacing-sm) 0;
    z-index: 1000;
}

.mobile-bottom-nav a {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.7rem;
    gap: 4px;
}

.mobile-bottom-nav a i {
    font-size: 1.2rem;
}

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

/* === 响应式设计 === */
@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr;
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .sidebar {
        display: none;
    }

    .featured-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .footer-links {
        grid-column: span 1;
        flex-direction: column;
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md) var(--spacing-sm);
    }

    .top-bar {
        padding: 0 var(--spacing-sm);
        flex-wrap: wrap;
    }

    .logo {
        font-size: 1.2rem;
        margin-bottom: var(--spacing-sm);
    }

    .search-bar {
        order: 3;
        width: 100%;
        max-width: 100%;
        margin: var(--spacing-sm) 0 0 0;
    }

    .header-actions {
        margin-left: auto;
    }

    .subscribe-btn {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--darker);
        border-bottom: 1px solid var(--border);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        z-index: var(--z-dropdown);
    }

    .main-nav.active {
        max-height: 500px;
    }

    .main-nav ul {
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-sm) 0;
    }

    .main-nav li {
        border-bottom: 1px solid var(--border);
    }

    .main-nav a {
        display: block;
        padding: var(--spacing-md) var(--spacing-md);
    }

    .main-nav .active a::after {
        display: none;
    }

    .hero-carousel {
        height: 280px;
        margin-bottom: var(--spacing-lg);
    }

    .carousel-content {
        padding: var(--spacing-md);
    }

    .carousel-content h2 {
        font-size: 1.4rem;
        margin: var(--spacing-xs) 0;
    }

    .carousel-content p {
        font-size: 0.9rem;
        margin-bottom: var(--spacing-sm);
    }

    .carousel-controls {
        bottom: var(--spacing-sm);
        right: var(--spacing-sm);
    }

    .featured-grid {
        gap: var(--spacing-md);
    }

    .featured-card .card-image {
        height: 180px;
    }

    .feed-grid {
        grid-template-columns: 1fr;
        gap: 5px;
    }

    .news-card .card-image {
        height: 200px;
    }

    .mobile-bottom-nav {
        display: flex;
    }

    .footer-content {
        padding: 0;
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 0;
    }

    .section-title {
        font-size: 1.3rem;
        margin-bottom: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .hero-carousel {
        height: 220px;
    }

    .carousel-content h2 {
        font-size: 1.2rem;
    }

    .carousel-content p {
        display: none;
    }

    .featured-card .card-image {
        height: 150px;
    }

    .news-card .card-image {
        height: 180px;
    }

    .header-actions {
        gap: var(--spacing-sm);
    }

    .search-bar input {
        padding: 8px;
        font-size: 0.85rem;
    }

    .search-bar button {
        padding: 8px 12px;
    }

    .section-title {
        font-size: 1.2rem;
    }
}
/* === 分类页面特定样式 === */
.category-header {
    background: linear-gradient(135deg, var(--darker), var(--dark));
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: var(--spacing-xl);
}

.category-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

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

.filter-btn {
    background: var(--card-bg);
    color: var(--text);
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid var(--border);
    font-size: 0.9rem;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.news-card.featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-md);
    background: linear-gradient(135deg, #1c1c1e, #151517);
}

.news-card.featured .card-image {
    height: 100%;
    min-height: 300px;
}

.news-card.featured .card-content {
    padding: var(--spacing-lg);
}

.news-card.featured h4 {
    font-size: 1.8rem;
    line-height: 1.3;
}

.breaking-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--secondary);
    color: white;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 1px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-xl) 0;
    flex-wrap: wrap;
}

.page-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--card-bg);
    color: var(--text);
    border: 1px solid var(--border);
    font-weight: 600;
    transition: var(--transition);
}

.page-btn:hover:not(.disabled) {
    background: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
}

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

.page-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.category-list-widget {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow);
}

.category-list-widget h4 {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border);
}

.category-list-widget ul {
    list-style: none;
}

.category-list-widget li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

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

.category-list-widget a {
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
}

.category-list-widget a:hover {
    color: var(--primary);
}

/* === 文本页面通用样式 === */
.page-header {
    background: linear-gradient(135deg, var(--darker), var(--dark));
    padding: var(--spacing-xl) 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: var(--spacing-xl);
}

.page-header h1 {
    font-size: 2.2rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 800;
}

.page-header .subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

.text-content-full {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
    max-width: 800px;
}

/* === 法律页面样式优化 === */
.legal-content {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow);
    max-width: 1000px;
    margin: 0 auto;
}

.legal-section {
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
    padding-bottom: var(--spacing-md);
}

.legal-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    cursor: pointer;
}

.section-header h3 {
    margin: 0;
    font-size: 1.2rem;
    color: var(--text);
}

.expand-toggle {
    background: var(--primary);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
}

.expand-toggle:hover {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.section-content {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    display: block;
}

.table-of-contents {
    background: rgba(10, 132, 255, 0.05);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin: var(--spacing-lg) 0;
    border-left: 3px solid var(--primary);
}

.table-of-contents h3 {
    color: var(--primary);
    margin-top: 0;
}

.table-of-contents ul {
    padding-left: var(--spacing-md);
}

.table-of-contents li {
    margin: var(--spacing-xs) 0;
}

.table-of-contents a {
    color: var(--primary-light);
    text-decoration: none;
    display: block;
    padding: var(--spacing-xs) 0;
    transition: var(--transition);
}

.table-of-contents a:hover {
    color: var(--primary);
    padding-left: var(--spacing-sm);
}

.text-content-full h2 {
    font-size: 1.6rem;
    margin: var(--spacing-lg) 0 var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border);
    color: var(--text);
    font-weight: 700;
}

.text-content-full h3 {
    font-size: 1.3rem;
    margin: var(--spacing-md) 0 var(--spacing-sm);
    color: var(--text);
    font-weight: 600;
}

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

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

.text-content-full li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

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

.text-content-full a {
    color: var(--primary);
    text-decoration: underline;
}

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

.text-content-full blockquote {
    border-left: 4px solid var(--primary);
    padding-left: var(--spacing-md);
    margin: var(--spacing-md) 0;
    font-style: italic;
    color: var(--text-secondary);
    background: rgba(10, 132, 255, 0.05);
    padding: var(--spacing-md);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.policy-section, .terms-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.policy-section:last-child, .terms-section:last-child {
    border-bottom: none;
}

.contact-info {
    background: rgba(10, 132, 255, 0.05);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    margin: var(--spacing-md) 0;
    border-left: 3px solid var(--primary);
}

.contact-info p {
    margin-bottom: var(--spacing-xs);
}

.policy-actions, .terms-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
}

.print-policy, .download-policy, .print-terms, .accept-terms {
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: var(--transition);
}

.print-policy, .print-terms {
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text);
}

.download-policy, .accept-terms {
    background: var(--primary);
    color: white;
}

.print-policy:hover, .print-terms:hover {
    background: var(--border);
}

.download-policy:hover, .accept-terms:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.quick-links-widget, .help-widget, .version-widget {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-lg);
}

.quick-links-widget h4, .help-widget h4, .version-widget h4 {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border);
}

.quick-links-widget ul, .help-widget ul {
    list-style: none;
}

.quick-links-widget li {
    margin-bottom: var(--spacing-sm);
}

.quick-links-widget a {
    color: var(--text-secondary);
    display: block;
    padding: 6px 0;
}

.quick-links-widget a.active,
.quick-links-widget a:hover {
    color: var(--primary);
    padding-left: var(--spacing-sm);
}

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

.contact-link {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.contact-link:hover {
    background: var(--primary-dark);
}

.version-widget p {
    margin-bottom: 5px;
    color: var(--text-secondary);
}

.version-widget p:first-of-type {
    color: var(--text);
    font-weight: 600;
}

/* === 移动端优化 === */
@media (max-width: 768px) {
    .category-header {
        padding: var(--spacing-lg) 0;
    }

    .category-header h1 {
        font-size: 1.8rem;
    }

    .category-filters {
        overflow-x: auto;
        padding-bottom: 5px;
    }

    .news-card.featured {
        grid-template-columns: 1fr;
    }

    .news-card.featured .card-image {
        height: 200px;
    }

    .news-card.featured h4 {
        font-size: 1.4rem;
    }

    .text-content-full {
        padding: var(--spacing-md);
    }

    .text-content-full h2 {
        font-size: 1.4rem;
    }

    .text-content-full h3 {
        font-size: 1.2rem;
    }

    .page-header h1 {
        font-size: 1.8rem;
    }

    .policy-actions, .terms-actions {
        flex-direction: column;
    }

    .policy-actions button, .terms-actions button {
        width: 100%;
    }

    /* 确保所有边距不超过5px */
    .container, .text-content-full, .category-header{
        margin-left: 5px !important;
        margin-right: 5px !important;
        padding-left: 5px !important;
        padding-right: 5px !important;
        gap: 0;
    }
    .news-card .card-content,.featured-card .card-content{
        padding: 5px;
    }
    p,h4{
        margin: 0 !important;
    }
    .featured-section,.hero-carousel{
        margin-bottom: 0 !important;
    }
    
    /* 法律页面移动端优化 */
    .legal-content {
        padding: var(--spacing-md);
        margin: 0 5px;
    }
    
    .legal-section {
        margin-bottom: var(--spacing-md);
    }
    
    .section-header h3 {
        font-size: 1.1rem;
    }
}

/* === 动画 === */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* 优化动画性能 */
.animate-out {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.animate-in {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

/* 使用transform3d优化动画性能 */
.animate-out {
    transform: translate3d(0, 20px, 0);
}

.animate-in {
    transform: translate3d(0, 0, 0);
}