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

:root {
    --primary-color: #c41e3a;
    --secondary-color: #1a1a1a;
    --accent-color: #d4af37;
    --text-color: #333333;
    --bg-color: #ffffff;
    --border-color: #e0e0e0;
    --hover-color: #a01729;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    line-height: 1.8;
    color: var(--text-color);
    background-color: var(--bg-color);
    font-size: 16px;
}

/* 容器布局 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.wide-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
}

/* 头部导航 */
header {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #2d2d2d 100%);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    position: relative;
    z-index: 100;
}

.header-top {
    background-color: var(--primary-color);
    padding: 10px 0;
    text-align: center;
    color: white;
    font-size: 14px;
}

.header-main {
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-section img {
    height: 60px;
    width: auto;
}

.site-title {
    color: white;
    font-size: 28px;
    font-weight: bold;
    letter-spacing: 2px;
}

/* 导航菜单 */
nav {
    background-color: rgba(0,0,0,0.3);
    padding: 0;
}

.nav-menu {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 5px;
    padding: 15px 0;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    padding: 12px 25px;
    display: block;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
    border-radius: 5px;
}

.nav-menu a:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

/* 英雄区域 */
.hero-section {
    position: relative;
    height: 500px;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.4), rgba(0,0,0,0.7));
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 40px;
}

.hero-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.8);
    line-height: 1.3;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 30px;
    text-shadow: 1px 1px 4px rgba(0,0,0,0.8);
}

.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(196, 30, 58, 0.4);
}

.cta-button:hover {
    background-color: var(--hover-color);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(196, 30, 58, 0.6);
}

/* 内容区块 */
.content-section {
    padding: 60px 0;
}

.section-title {
    font-size: 36px;
    color: var(--secondary-color);
    margin-bottom: 15px;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    font-size: 18px;
    color: #666;
    margin-bottom: 50px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* 视频网格 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.video-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

.video-thumbnail {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    overflow: hidden;
}

.video-thumbnail img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 70px;
    height: 70px;
    opacity: 0.9;
    transition: all 0.3s ease;
}

.video-card:hover .play-overlay {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.1);
}

.video-info {
    padding: 20px;
}

.video-title {
    font-size: 18px;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 10px;
    line-height: 1.4;
}

.video-description {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    margin-top: 15px;
    font-size: 13px;
    color: #999;
}

/* 面包屑导航 */
.breadcrumb {
    padding: 20px 0;
    background-color: #f8f8f8;
}

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

.breadcrumb-list li {
    display: flex;
    align-items: center;
}

.breadcrumb-list li:not(:last-child)::after {
    content: '›';
    margin-left: 10px;
    color: #999;
}

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

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

/* 关于我们区块 */
.about-section {
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    padding: 80px 0;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    padding: 50px;
    border-radius: 15px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

.about-content h3 {
    font-size: 28px;
    color: var(--primary-color);
    margin-top: 30px;
    margin-bottom: 15px;
}

.about-content p {
    font-size: 17px;
    line-height: 2;
    margin-bottom: 20px;
    text-align: justify;
}

/* 认证徽章 */
.certification-section {
    text-align: center;
    padding: 60px 0;
    background-color: #fafafa;
}

.badge-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
    margin-top: 40px;
}

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

.badge-item img {
    width: 200px;
    height: 200px;
    object-fit: contain;
    margin-bottom: 15px;
}

.badge-item p {
    font-size: 16px;
    color: #666;
    font-weight: 500;
}

/* FAQ区块 */
.faq-section {
    padding: 80px 0;
    background-color: white;
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: #f9f9f9;
    border-left: 4px solid var(--primary-color);
    padding: 25px 30px;
    margin-bottom: 20px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.faq-item:hover {
    background: #f0f0f0;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.faq-question {
    font-size: 19px;
    font-weight: bold;
    color: var(--secondary-color);
    margin-bottom: 12px;
}

.faq-answer {
    font-size: 16px;
    color: #555;
    line-height: 1.8;
}

/* 评论区块 */
.reviews-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #fff5f5 0%, #ffe8e8 100%);
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.review-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.reviewer-name {
    font-size: 18px;
    font-weight: bold;
    color: var(--secondary-color);
}

.review-rating {
    color: var(--accent-color);
    font-size: 20px;
}

.reviewer-location {
    font-size: 14px;
    color: #999;
    margin-bottom: 15px;
}

.review-text {
    font-size: 15px;
    line-height: 1.8;
    color: #555;
    margin-bottom: 15px;
}

.review-date {
    font-size: 13px;
    color: #999;
    text-align: right;
}

/* 页脚 */
footer {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #0d0d0d 100%);
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: var(--accent-color);
}

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

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 30px;
    text-align: center;
    color: #999;
    font-size: 14px;
}

/* 视频播放器 */
.video-player-section {
    background-color: #000;
    padding: 40px 0;
    margin: 40px 0;
}

.video-player-container {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    padding-top: 56.25%;
    background-color: #1a1a1a;
    border-radius: 10px;
    overflow: hidden;
}

.video-player-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    color: white;
}

.video-player-placeholder img {
    width: 100px;
    height: 100px;
    margin-bottom: 20px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-main {
        flex-direction: column;
        text-align: center;
    }
    
    .nav-menu {
        flex-direction: column;
        align-items: stretch;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu a {
        padding: 15px;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .video-grid {
        grid-template-columns: 1fr;
    }
    
    .reviews-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .about-content {
        padding: 30px 20px;
    }
}

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* 辅助类 */
.text-center {
    text-align: center;
}

.mt-20 {
    margin-top: 20px;
}

.mt-40 {
    margin-top: 40px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mb-40 {
    margin-bottom: 40px;
}