/* 
 * sjzhongsu.com - 91视频在线观看18 
 * 全新设计的CSS样式
 */

/* CSS变量 */
:root {
    --primary-color: #e91e63;
    --primary-dark: #c2185b;
    --primary-light: #f48fb1;
    --secondary-color: #9c27b0;
    --accent-color: #ff4081;
    --dark-bg: #0a0a0f;
    --card-bg: #16161f;
    --card-hover: #1e1e2a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #666666;
    --border-color: #2a2a3a;
    --gradient-primary: linear-gradient(135deg, #e91e63 0%, #9c27b0 100%);
    --gradient-dark: linear-gradient(180deg, #0a0a0f 0%, #1a1a2e 100%);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.5);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
}

/* 重置样式 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

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

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

ul, ol {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

/* 容器 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
    color: white;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: var(--card-bg);
}

.header-search {
    display: flex;
    align-items: center;
    gap: 10px;
}

.search-input {
    width: 220px;
    padding: 10px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: var(--transition);
}

.search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(233, 30, 99, 0.2);
}

.search-btn {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Hero区域 */
.hero {
    padding: 120px 0 80px;
    background: var(--gradient-dark);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 20%, rgba(233, 30, 99, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(156, 39, 176, 0.1) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-lg);
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

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

.btn-outline {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

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

/* 搜索框区域 */
.search-section {
    padding: 30px 0;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
}

.search-box {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    gap: 12px;
}

.search-box input {
    flex: 1;
    padding: 16px 24px;
    background: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 16px;
    outline: none;
}

.search-box input:focus {
    border-color: var(--primary-color);
}

.search-box button {
    padding: 16px 32px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    color: white;
    font-size: 16px;
    font-weight: 600;
}

/* 区块标题 */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* 视频网格 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.video-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.video-card:hover .video-thumb img {
    transform: scale(1.08);
}

.video-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(233, 30, 99, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.video-play::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 20px solid white;
    border-top: 12px solid transparent;
    border-bottom: 12px solid transparent;
    margin-left: 4px;
}

.video-card:hover .video-play {
    opacity: 1;
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.8);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.video-info {
    padding: 16px;
}

.video-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* 分类标签 */
.category-tabs {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.category-tab {
    padding: 10px 24px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.category-tab:hover,
.category-tab.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
}

/* 特色功能 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
}

.feature-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 专家团队 */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.expert-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    transition: var(--transition);
}

.expert-card:hover {
    border-color: var(--primary-color);
}

.expert-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 16px;
    border: 3px solid var(--primary-color);
}

.expert-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.expert-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.expert-title {
    font-size: 14px;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.expert-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 用户评价 */
.review-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.review-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
}

.review-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.review-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
}

.review-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.review-user {
    flex: 1;
}

.review-name {
    font-size: 15px;
    font-weight: 600;
}

.review-date {
    font-size: 12px;
    color: var(--text-muted);
}

.review-stars {
    color: #ffc107;
    font-size: 14px;
}

.review-content {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 合作品牌 */
.partner-grid {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    opacity: 0.7;
}

.partner-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-secondary);
}

/* 联系我们 */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.contact-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 20px;
}

.contact-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

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

/* 页脚 */
.footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links a {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    padding: 6px 0;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-muted);
}

/* 面包屑 */
.breadcrumb {
    padding: 100px 0 20px;
    font-size: 14px;
    color: var(--text-secondary);
}

.breadcrumb a {
    color: var(--text-secondary);
}

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

.breadcrumb span {
    margin: 0 8px;
}

/* 内页标题 */
.page-header {
    padding: 40px 0 60px;
    text-align: center;
}

.page-title {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

.page-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .video-grid,
    .feature-grid,
    .expert-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .video-grid,
    .feature-grid,
    .expert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .review-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero h1 {
        font-size: 36px;
    }
}

@media (max-width: 768px) {
    .video-grid,
    .feature-grid,
    .expert-grid,
    .review-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .header-search {
        display: none;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-btns {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* 懒加载图片 */
img[data-src] {
    opacity: 0;
    transition: opacity 0.3s;
}

img[data-src].loaded {
    opacity: 1;
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}


/* 面包屑导航样式 */
.breadcrumb {
    padding: 15px 0;
    margin-bottom: 20px;
}

.breadcrumb ol {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0;
    flex-wrap: wrap;
}

.breadcrumb li {
    display: flex;
    align-items: center;
    color: #9CA3AF;
    font-size: 14px;
}

.breadcrumb li:not(:last-child)::after {
    content: ">";
    margin: 0 10px;
    color: #6B7280;
}

.breadcrumb a {
    color: #A855F7;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}