/* 糖心vlog - 全新原创主题样式 */
/* 影视传媒视频社区专属设计 */

:root {
    --primary: #ff2d55;
    --primary-dark: #d91a40;
    --secondary: #5856d6;
    --accent: #ff9500;
    --dark: #1a1a2e;
    --darker: #0f0f1a;
    --light: #f8f9fa;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --success: #34c759;
    --gradient-primary: linear-gradient(135deg, #ff2d55 0%, #ff6b8a 100%);
    --gradient-dark: linear-gradient(180deg, #1a1a2e 0%, #0f0f1a 100%);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.2);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

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

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

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

/* 顶部导航 - 影视风格 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 26, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

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

.logo img {
    width: 44px;
    height: 44px;
    border-radius: 10px;
}

.logo-text {
    font-size: 1.4rem;
    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-menu a {
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    color: rgba(255,255,255,0.7);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #fff;
    background: rgba(255, 45, 85, 0.15);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: var(--transition);
}

/* 视频主横幅 - 影院风格 */
.video-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--darker);
    padding-top: 70px;
}

.video-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
}

.video-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(15,15,26,0.3) 0%, rgba(15,15,26,0.9) 100%);
}

.video-hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
    padding: 40px 20px;
}

.video-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 45, 85, 0.2);
    border: 1px solid rgba(255, 45, 85, 0.3);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--primary);
    margin-bottom: 24px;
}

.video-badge::before {
    content: '▶';
    font-size: 0.7rem;
}

.video-hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.8) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.video-hero h1 span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
}

.video-hero-desc {
    font-size: 1.2rem;
    color: rgba(255,255,255,0.7);
    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;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(255, 45, 85, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(255, 45, 85, 0.5);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.3);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.5);
}

/* 视频统计条 */
.video-stats-bar {
    background: var(--dark);
    border-top: 1px solid rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.05);
    padding: 30px 0;
}

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

.stat-item h3 {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-item p {
    color: rgba(255,255,255,0.6);
    font-size: 0.95rem;
}

/* 内容区块 */
.section {
    padding: 80px 0;
}

.section-dark {
    background: var(--dark);
}

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

.section-tag {
    display: inline-block;
    background: rgba(255, 45, 85, 0.15);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: #fff;
}

.section-header p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.6);
    max-width: 600px;
    margin: 0 auto;
}

/* 视频卡片网格 - 影视风格 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.video-card {
    background: rgba(255,255,255,0.03);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255,255,255,0.05);
}

.video-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 45, 85, 0.3);
}

.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);
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    width: 60px;
    height: 60px;
    background: rgba(255, 45, 85, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 18px solid #fff;
    border-top: 11px solid transparent;
    border-bottom: 11px solid transparent;
    margin-left: 4px;
}

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

.video-duration {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: rgba(0,0,0,0.8);
    color: #fff;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
}

.live-badge {
    background: var(--primary) !important;
    animation: pulse 2s infinite;
}

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

.video-info {
    padding: 16px;
}

.video-info h3 {
    font-size: 1rem;
    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;
    gap: 12px;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

.video-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.video-tag {
    background: rgba(255, 45, 85, 0.1);
    color: var(--primary);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
}

/* 模块卡片 - 多维度内容 */
.module-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.module-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
}

.module-card:hover {
    background: rgba(255,255,255,0.06);
    border-color: rgba(255, 45, 85, 0.3);
    transform: translateY(-4px);
}

.module-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 20px;
}

.module-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.module-card p {
    color: rgba(255,255,255,0.6);
    font-size: 0.95rem;
    line-height: 1.7;
}

.module-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.module-tags span {
    background: rgba(88, 86, 214, 0.15);
    color: var(--secondary);
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.8rem;
}

/* 专家团队展示 - EEAT */
.expert-section {
    background: linear-gradient(135deg, var(--dark) 0%, var(--darker) 100%);
    padding: 100px 0;
}

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

.expert-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    transition: var(--transition);
}

.expert-card:hover {
    background: rgba(255,255,255,0.06);
    border-color: rgba(255, 45, 85, 0.3);
}

.expert-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 20px;
    border: 3px solid var(--primary);
}

.expert-card h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.expert-role {
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 12px;
}

.expert-cert {
    background: rgba(52, 199, 89, 0.1);
    color: var(--success);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    margin-bottom: 12px;
    display: inline-block;
}

.expert-desc {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* 社区功能区 */
.community-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.community-item {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-md);
    padding: 24px 16px;
    text-align: center;
    transition: var(--transition);
}

.community-item:hover {
    background: rgba(255, 45, 85, 0.1);
    border-color: rgba(255, 45, 85, 0.3);
}

.community-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.community-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
}

/* AI工具展示 */
.ai-tools-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.ai-tool-card {
    background: linear-gradient(135deg, rgba(88, 86, 214, 0.1) 0%, rgba(255, 45, 85, 0.1) 100%);
    border: 1px solid rgba(88, 86, 214, 0.2);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
}

.ai-tool-card:hover {
    transform: translateY(-4px);
    border-color: var(--secondary);
}

.ai-tool-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.ai-tool-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.ai-tool-card p {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* 面包屑导航 */
.breadcrumb {
    background: var(--dark);
    padding: 15px 0;
    margin-top: 70px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 10px;
    list-style: none;
    font-size: 0.9rem;
}

.breadcrumb-list a {
    color: rgba(255,255,255,0.6);
}

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

.breadcrumb-list .current {
    color: var(--primary);
}

/* 页面标题区 */
.page-header {
    background: linear-gradient(135deg, var(--dark) 0%, var(--darker) 100%);
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.page-header p {
    color: rgba(255,255,255,0.6);
    font-size: 1.1rem;
}

/* 页脚 */
.footer {
    background: var(--darker);
    border-top: 1px solid rgba(255,255,255,0.05);
    padding: 60px 0 30px;
}

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

.footer-brand img {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    margin-bottom: 16px;
}

.footer-brand h4 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-links h5 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

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

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

.footer-links a {
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
}

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

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

.footer-qrcode img {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
}

.footer-qrcode span {
    display: block;
    color: rgba(255,255,255,0.5);
    font-size: 0.85rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.05);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    color: rgba(255,255,255,0.4);
    font-size: 0.85rem;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    color: rgba(255,255,255,0.5);
    font-size: 0.9rem;
}

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

/* 响应式设计 */
@media (max-width: 1200px) {
    .video-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .expert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .ai-tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .video-hero h1 {
        font-size: 2.5rem;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .module-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .community-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--darker);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .nav-menu.active {
        display: flex;
    }
    .mobile-menu-btn {
        display: flex;
    }
    .video-hero h1 {
        font-size: 2rem;
    }
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .section-header h2 {
        font-size: 1.8rem;
    }
    .module-grid,
    .expert-grid,
    .ai-tools-grid {
        grid-template-columns: 1fr;
    }
    .community-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

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