/* 40分钟调色大片高清视频 - 00678.hk 网站样式 */

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

:root {
    --primary-color: #8B5CF6;
    --secondary-color: #F59E0B;
    --accent-color: #EC4899;
    --dark-bg: #1F2937;
    --light-bg: #F9FAFB;
    --text-dark: #111827;
    --text-light: #6B7280;
    --border-color: #E5E7EB;
    --success-color: #10B981;
    --gradient: linear-gradient(135deg, #8B5CF6 0%, #EC4899 50%, #F59E0B 100%);
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #fff;
    overflow-x: hidden;
}

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

.section {
    padding: 80px 0;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 18px;
    text-align: center;
    color: var(--text-light);
    margin-bottom: 60px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ========== 头部导航 ========== */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

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

.logo-img {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width 0.3s;
}

.nav-menu a:hover::after {
    width: 100%;
}

/* ========== 搜索框 ========== */
.search-bar {
    background: var(--light-bg);
    padding: 24px 0;
    border-bottom: 1px solid var(--border-color);
}

.search-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 14px 50px 14px 20px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    font-size: 16px;
    transition: all 0.3s;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.1);
}

.search-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--gradient);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    color: #fff;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s;
}

.search-btn:hover {
    transform: translateY(-50%) scale(1.1);
}

/* ========== Hero Banner ========== */
.hero {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.05) 0%, rgba(236, 72, 153, 0.05) 100%);
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--text-dark);
}

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

.hero-text p {
    font-size: 20px;
    color: var(--text-light);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}

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

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 4px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

.btn {
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--gradient);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(139, 92, 246, 0.3);
}

.btn-secondary {
    background: #fff;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

/* ========== 视频卡片网格 ========== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.video-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: all 0.3s;
    cursor: pointer;
    position: relative;
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.15);
}

.video-thumbnail {
    position: relative;
    padding-top: 56.25%; /* 16:9 */
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    overflow: hidden;
}

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

.play-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

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

.play-button {
    width: 70px;
    height: 70px;
    background: rgba(255,255,255,0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--primary-color);
    transform: scale(0.8);
    transition: transform 0.3s;
}

.video-card:hover .play-button {
    transform: scale(1);
}

.video-duration {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background: rgba(0,0,0,0.8);
    color: #fff;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 600;
}

.video-info {
    padding: 20px;
}

.video-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--text-light);
}

.video-views,
.video-likes {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ========== 专家团队 ========== */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 40px;
}

.expert-card {
    text-align: center;
    background: #fff;
    border-radius: 20px;
    padding: 40px 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: all 0.3s;
}

.expert-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}

.expert-avatar {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 24px;
    border: 5px solid var(--light-bg);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.expert-name {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.expert-title {
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 16px;
    font-weight: 600;
}

.expert-bio {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.expert-stats {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

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

.expert-stat-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.expert-stat-label {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 4px;
}

/* ========== 用户评价 ========== */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.review-card {
    background: #fff;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: all 0.3s;
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.12);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.reviewer-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient);
}

.reviewer-info h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.reviewer-role {
    font-size: 13px;
    color: var(--text-light);
}

.review-rating {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
}

.star {
    color: #F59E0B;
    font-size: 18px;
}

.review-text {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-light);
}

/* ========== 页脚 ========== */
.footer {
    background: var(--dark-bg);
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.footer-logo img {
    width: 40px;
    height: 40px;
}

.footer-logo span {
    font-size: 20px;
    font-weight: 700;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    color: #9CA3AF;
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s;
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.footer-section h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 20px;
}

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

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

.footer-links a {
    color: #9CA3AF;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #fff;
}

.footer-qr {
    display: flex;
    gap: 20px;
}

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

.qr-item img {
    width: 100px;
    height: 100px;
    border-radius: 8px;
    margin-bottom: 8px;
}

.qr-label {
    font-size: 12px;
    color: #9CA3AF;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    font-size: 14px;
    color: #9CA3AF;
}

/* ========== 响应式设计 ========== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-text h1 {
        font-size: 36px;
    }
    
    .video-grid,
    .expert-grid,
    .reviews-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
}

/* ========== 动画效果 ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* ========== 懒加载占位符 ========== */
.lazy-load {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}