/* 国产视频 - 全新原创样式 v5 */
/* 域名: alikace.cn */

:root {
    --primary-color: #ff6b9d;
    --secondary-color: #c44569;
    --accent-color: #f8a5c2;
    --dark-color: #2d132c;
    --light-color: #ffeaa7;
    --text-color: #2d3436;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --card-shadow: 0 10px 40px rgba(0,0,0,0.15);
}

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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.8;
    color: var(--text-color);
    background: #fafafa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部导航 */
.header {
    background: linear-gradient(135deg, #2d132c 0%, #4a1942 100%);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo img {
    height: 50px;
    border-radius: 10px;
}

.logo-text {
    font-size: 26px;
    font-weight: bold;
    background: linear-gradient(90deg, #ff6b9d, #f8a5c2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.main-nav a {
    color: #fff;
    text-decoration: none;
    font-size: 15px;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
    background: var(--primary-color);
    color: #fff;
}

/* 搜索框 */
.search-box {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.15);
    border-radius: 25px;
    padding: 8px 15px;
}

.search-box input {
    background: transparent;
    border: none;
    color: #fff;
    outline: none;
    width: 150px;
    font-size: 14px;
}

.search-box input::placeholder {
    color: rgba(255,255,255,0.6);
}

.search-box button {
    background: transparent;
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 16px;
}

/* 英雄区域 */
.hero-section {
    background: var(--bg-gradient);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/hero-banner.jpg') center/cover;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: #fff;
}

.hero-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.3);
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.btn-primary {
    background: var(--primary-color);
    color: #fff;
    padding: 15px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(255,107,157,0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255,107,157,0.6);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    padding: 15px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: bold;
    border: 2px solid #fff;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: #fff;
    color: var(--dark-color);
}

/* 视频卡片区域 */
.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 36px;
    color: var(--dark-color);
    margin-bottom: 15px;
}

.section-title p {
    color: #666;
    font-size: 16px;
}

.video-section {
    padding: 80px 0;
    background: #fff;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.video-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: all 0.4s ease;
    position: relative;
}

.video-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.2);
}

.video-thumb {
    position: relative;
    padding-top: 56.25%;
    overflow: hidden;
}

.video-thumb img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.video-card:hover .video-thumb img {
    transform: scale(1.1);
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 70px;
    height: 70px;
    background: rgba(255,107,157,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.play-btn::after {
    content: '';
    border-style: solid;
    border-width: 12px 0 12px 20px;
    border-color: transparent transparent transparent #fff;
    margin-left: 5px;
}

.video-card:hover .play-btn {
    transform: translate(-50%, -50%) scale(1);
}

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.8);
    color: #fff;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.video-info {
    padding: 20px;
}

.video-info h3 {
    font-size: 16px;
    margin-bottom: 10px;
    color: var(--dark-color);
    line-height: 1.4;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    color: #999;
    font-size: 13px;
}

/* 特色功能区 */
.features-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-card {
    background: #fff;
    padding: 40px 25px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 36px;
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--dark-color);
}

.feature-card p {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
}

/* 创作者展示 */
.creators-section {
    padding: 80px 0;
    background: #fff;
}

.creators-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.creator-card {
    text-align: center;
    padding: 30px;
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    border-radius: 20px;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
}

.creator-card:hover {
    transform: translateY(-8px);
}

.creator-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--primary-color);
    margin-bottom: 20px;
}

.creator-card h3 {
    font-size: 20px;
    color: var(--dark-color);
    margin-bottom: 8px;
}

.creator-card .role {
    color: var(--primary-color);
    font-size: 14px;
    margin-bottom: 15px;
}

.creator-card p {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
}

/* 专家团队 */
.experts-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #2d132c 0%, #4a1942 100%);
    color: #fff;
}

.experts-section .section-title h2 {
    color: #fff;
}

.experts-section .section-title p {
    color: rgba(255,255,255,0.7);
}

.experts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.expert-card {
    display: flex;
    gap: 25px;
    background: rgba(255,255,255,0.1);
    padding: 30px;
    border-radius: 16px;
    backdrop-filter: blur(10px);
}

.expert-card img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-color);
}

.expert-info h3 {
    font-size: 20px;
    margin-bottom: 5px;
}

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

.expert-info p {
    font-size: 14px;
    opacity: 0.8;
    line-height: 1.6;
}

/* 页脚 */
.footer {
    background: #1a0a19;
    color: #fff;
    padding: 60px 0 30px;
}

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

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand p {
    color: rgba(255,255,255,0.7);
    font-size: 14px;
    line-height: 1.8;
}

.footer-links h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

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

.footer-qrcode {
    text-align: center;
}

.footer-qrcode img {
    width: 120px;
    border-radius: 10px;
    margin-bottom: 10px;
}

.footer-qrcode p {
    font-size: 13px;
    color: rgba(255,255,255,0.7);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 30px;
    text-align: center;
    color: rgba(255,255,255,0.5);
    font-size: 13px;
}

/* 面包屑导航 */
.breadcrumb {
    padding: 20px 0;
    background: #f8f9fa;
}

.breadcrumb-list {
    display: flex;
    list-style: none;
    gap: 10px;
    font-size: 14px;
}

.breadcrumb-list a {
    color: var(--primary-color);
    text-decoration: none;
}

.breadcrumb-list span {
    color: #999;
}

/* 内页横幅 */
.page-banner {
    padding: 60px 0;
    background: var(--bg-gradient);
    text-align: center;
    color: #fff;
}

.page-banner h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.page-banner p {
    font-size: 18px;
    opacity: 0.9;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        gap: 15px;
    }
    
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .creators-grid {
        grid-template-columns: 1fr;
    }
    
    .experts-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .expert-card {
        flex-direction: column;
        text-align: center;
    }
}

/* 懒加载动画 */
.lazy-load {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.lazy-load.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 20px rgba(255,107,157,0.4);
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top:hover {
    transform: translateY(-5px);
}

.back-to-top.show {
    display: flex;
}