/* =============================================
   海角 - TangXin Media 主样式文件
   版本: 1.0 | 域名: tnjfcmn.cn
   ============================================= */

/* CSS变量定义 */
:root {
    --primary: #E8336D;
    --primary-dark: #C4215A;
    --primary-light: #FF6B9D;
    --secondary: #1A1A2E;
    --accent: #F5A623;
    --accent-light: #FFD166;
    --bg-dark: #0F0F1A;
    --bg-card: #1E1E30;
    --bg-card-hover: #252540;
    --text-primary: #FFFFFF;
    --text-secondary: #B8B8CC;
    --text-muted: #7A7A9A;
    --border: rgba(255,255,255,0.08);
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
    --shadow-card: 0 4px 20px rgba(0,0,0,0.3);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
    --font-main: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
}

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

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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;
    outline: none;
    font-family: var(--font-main);
}

input, textarea, select {
    font-family: var(--font-main);
    outline: none;
}

/* 容器 */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-wide {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 20px;
}

/* =============================================
   顶部公告栏
   ============================================= */
.top-bar {
    background: linear-gradient(90deg, var(--primary-dark), var(--primary), var(--accent));
    background-size: 200% 100%;
    animation: gradientShift 4s ease infinite;
    padding: 8px 0;
    text-align: center;
    font-size: 13px;
    color: #fff;
    position: relative;
    z-index: 100;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.top-bar a {
    color: #fff;
    font-weight: 600;
    margin: 0 8px;
    text-decoration: underline;
}

/* =============================================
   头部导航
   ============================================= */
.site-header {
    background: rgba(15, 15, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 999;
    transition: var(--transition);
}

.site-header.scrolled {
    background: rgba(15, 15, 26, 0.98);
    box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    max-width: 1280px;
    margin: 0 auto;
    gap: 20px;
}

/* Logo */
.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.site-logo img {
    height: 44px;
    width: auto;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 22px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.logo-tagline {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 1px;
}

/* 主导航 */
.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.main-nav a {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
    position: relative;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--text-primary);
    background: rgba(232, 51, 109, 0.12);
}

.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}

/* 头部右侧操作区 */
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.btn-login {
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
    transition: var(--transition);
}

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

.btn-register {
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 15px rgba(232, 51, 109, 0.3);
    transition: var(--transition);
}

.btn-register:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(232, 51, 109, 0.4);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    padding: 6px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* =============================================
   搜索框
   ============================================= */
.search-bar-section {
    background: var(--secondary);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
}

.search-bar-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.search-form {
    flex: 1;
    max-width: 600px;
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 24px;
    padding: 0 16px;
    transition: var(--transition);
}

.search-form:focus-within {
    border-color: var(--primary);
    background: rgba(232, 51, 109, 0.06);
    box-shadow: 0 0 0 3px rgba(232, 51, 109, 0.1);
}

.search-form input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    padding: 10px 0;
}

.search-form input::placeholder {
    color: var(--text-muted);
}

.search-form button {
    background: none;
    color: var(--text-muted);
    padding: 4px;
    font-size: 16px;
    transition: var(--transition);
}

.search-form button:hover {
    color: var(--primary);
}

.search-hot-tags {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.search-hot-tags span {
    font-size: 12px;
    color: var(--text-muted);
}

.hot-tag {
    font-size: 12px;
    padding: 3px 10px;
    border-radius: 12px;
    background: rgba(255,255,255,0.06);
    color: var(--text-secondary);
    transition: var(--transition);
    cursor: pointer;
}

.hot-tag:hover {
    background: rgba(232, 51, 109, 0.15);
    color: var(--primary-light);
}

/* =============================================
   面包屑导航
   ============================================= */
.breadcrumb {
    padding: 12px 0;
    font-size: 13px;
    color: var(--text-muted);
}

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

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

.breadcrumb span {
    margin: 0 6px;
}

/* =============================================
   Hero 横幅区域
   ============================================= */
.hero-section {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('../images/hero_banner.jpg');
    background-size: cover;
    background-position: center;
    filter: brightness(0.4);
    transform: scale(1.05);
    transition: transform 8s ease;
}

.hero-section:hover .hero-bg {
    transform: scale(1.0);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15,15,26,0.8) 0%, rgba(232,51,109,0.15) 50%, rgba(15,15,26,0.6) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1280px;
    margin: 0 auto;
    padding: 80px 20px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(232, 51, 109, 0.2);
    border: 1px solid rgba(232, 51, 109, 0.4);
    border-radius: 20px;
    padding: 6px 16px;
    font-size: 13px;
    color: var(--primary-light);
    margin-bottom: 20px;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s ease infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
    font-size: clamp(36px, 5vw, 64px);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 16px;
}

.hero-title .brand {
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 32px;
    line-height: 1.7;
}

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

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 28px;
    font-size: 15px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 6px 24px rgba(232, 51, 109, 0.4);
    transition: var(--transition);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(232, 51, 109, 0.5);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 28px;
    font-size: 15px;
    font-weight: 600;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    color: #fff;
    backdrop-filter: blur(10px);
    transition: var(--transition);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.15);
    border-color: rgba(255,255,255,0.3);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 48px;
    flex-wrap: wrap;
}

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

.stat-num {
    font-size: 32px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* =============================================
   通用区块样式
   ============================================= */
.section {
    padding: 64px 0;
}

.section-sm {
    padding: 40px 0;
}

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

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(24px, 3vw, 36px);
    font-weight: 800;
    margin-bottom: 12px;
    line-height: 1.3;
}

.section-title .highlight {
    color: var(--primary);
}

.section-desc {
    font-size: 15px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

.section-header-flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    gap: 16px;
}

.section-header-flex .section-title {
    margin-bottom: 0;
}

.view-all {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--primary);
    white-space: nowrap;
    transition: var(--transition);
}

.view-all:hover {
    gap: 10px;
}

/* =============================================
   视频卡片
   ============================================= */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.video-grid-5 {
    grid-template-columns: repeat(5, 1fr);
}

.video-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

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

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

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: rgba(232, 51, 109, 0.3);
}

.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: #111;
}

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

.video-card:hover .video-thumb img {
    transform: scale(1.06);
}

.play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.3);
    opacity: 0;
    transition: var(--transition);
}

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

.play-icon {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: rgba(232, 51, 109, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(0.8);
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(232, 51, 109, 0.5);
}

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

.play-icon svg {
    width: 22px;
    height: 22px;
    fill: #fff;
    margin-left: 3px;
}

.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    font-size: 12px;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 600;
}

.video-quality {
    position: absolute;
    top: 8px;
    left: 8px;
    background: var(--primary);
    color: #fff;
    font-size: 11px;
    padding: 2px 7px;
    border-radius: 4px;
    font-weight: 700;
}

.video-info {
    padding: 14px;
}

.video-title {
    font-size: 14px;
    font-weight: 600;
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    color: var(--text-primary);
}

.video-card:hover .video-title {
    color: var(--primary-light);
}

.video-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}

.video-author {
    display: flex;
    align-items: center;
    gap: 6px;
}

.author-avatar {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

.video-stats {
    display: flex;
    gap: 10px;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 8px;
}

.video-stats span {
    display: flex;
    align-items: center;
    gap: 3px;
}

/* =============================================
   分类标签栏
   ============================================= */
.category-tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
    margin-bottom: 28px;
}

.category-tabs::-webkit-scrollbar {
    display: none;
}

.cat-tab {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    background: rgba(255,255,255,0.06);
    color: var(--text-secondary);
    border: 1px solid transparent;
    transition: var(--transition);
    cursor: pointer;
}

.cat-tab:hover,
.cat-tab.active {
    background: rgba(232, 51, 109, 0.15);
    color: var(--primary-light);
    border-color: rgba(232, 51, 109, 0.3);
}

/* =============================================
   图片展示卡片
   ============================================= */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
}

.photo-card {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    aspect-ratio: 3/4;
    cursor: pointer;
}

.photo-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

.photo-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
    opacity: 0;
    transition: var(--transition);
    display: flex;
    align-items: flex-end;
    padding: 12px;
}

.photo-card:hover .photo-overlay {
    opacity: 1;
}

.photo-title {
    font-size: 13px;
    font-weight: 600;
    color: #fff;
}

/* =============================================
   专家/团队卡片
   ============================================= */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 24px;
}

.expert-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.expert-card:hover {
    transform: translateY(-4px);
    border-color: rgba(232, 51, 109, 0.3);
    box-shadow: var(--shadow-card);
}

.expert-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    color: #fff;
    position: relative;
}

.expert-badge {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid var(--bg-card);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.expert-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 4px;
}

.expert-role {
    font-size: 13px;
    color: var(--primary-light);
    margin-bottom: 12px;
}

.expert-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.expert-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    margin-bottom: 16px;
}

.expert-tag {
    font-size: 11px;
    padding: 3px 10px;
    border-radius: 12px;
    background: rgba(232, 51, 109, 0.12);
    color: var(--primary-light);
}

.expert-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.btn-sm {
    padding: 7px 16px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
    transition: var(--transition);
}

.btn-outline {
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--text-secondary);
    background: transparent;
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary-light);
}

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

.btn-filled:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* =============================================
   合作品牌Logo墙
   ============================================= */
.partner-wall {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    align-items: center;
}

.partner-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px 24px;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-muted);
    transition: var(--transition);
    min-width: 120px;
    text-align: center;
}

.partner-item:hover {
    border-color: rgba(232, 51, 109, 0.3);
    color: var(--text-primary);
    background: var(--bg-card-hover);
}

/* =============================================
   FAQ 手风琴
   ============================================= */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.open {
    border-color: rgba(232, 51, 109, 0.3);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    gap: 16px;
}

.faq-question:hover {
    color: var(--primary-light);
}

.faq-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(232, 51, 109, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
    font-size: 16px;
    color: var(--primary);
}

.faq-item.open .faq-icon {
    background: var(--primary);
    color: #fff;
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.open .faq-answer {
    max-height: 300px;
}

.faq-answer-inner {
    padding: 0 20px 18px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    border-top: 1px solid var(--border);
    padding-top: 14px;
}

/* =============================================
   用户评价
   ============================================= */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

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

.review-card:hover {
    border-color: rgba(232, 51, 109, 0.2);
    box-shadow: var(--shadow-card);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.reviewer-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

.reviewer-info {
    flex: 1;
}

.reviewer-name {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 2px;
}

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

.review-stars {
    color: var(--accent);
    font-size: 14px;
    letter-spacing: 1px;
}

.review-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.review-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}

.review-likes {
    display: flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.review-likes:hover {
    color: var(--primary);
}

/* =============================================
   联系我们 / 社区入口
   ============================================= */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
}

.contact-card:hover {
    border-color: rgba(232, 51, 109, 0.3);
    transform: translateY(-2px);
}

.contact-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, rgba(232, 51, 109, 0.2), rgba(245, 166, 35, 0.2));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 16px;
}

.contact-title {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
}

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

.contact-info a {
    color: var(--primary-light);
}

.contact-info a:hover {
    text-decoration: underline;
}

/* QR码展示 */
.qr-section {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
}

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

.qr-item img {
    width: 140px;
    height: 140px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin: 0 auto 10px;
    border: 2px solid var(--border);
}

.qr-label {
    font-size: 13px;
    color: var(--text-secondary);
}

/* =============================================
   社交分享
   ============================================= */
.share-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.share-label {
    font-size: 14px;
    color: var(--text-muted);
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
}

.share-wechat { background: rgba(9, 187, 7, 0.15); color: #09BB07; border: 1px solid rgba(9,187,7,0.3); }
.share-weibo { background: rgba(230, 22, 45, 0.15); color: #E6162D; border: 1px solid rgba(230,22,45,0.3); }
.share-douyin { background: rgba(0, 0, 0, 0.3); color: #fff; border: 1px solid rgba(255,255,255,0.2); }
.share-bilibili { background: rgba(0, 161, 214, 0.15); color: #00A1D6; border: 1px solid rgba(0,161,214,0.3); }

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

/* =============================================
   AI赋能区块
   ============================================= */
.ai-features {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}

.ai-card {
    background: linear-gradient(135deg, var(--bg-card), rgba(232, 51, 109, 0.05));
    border: 1px solid rgba(232, 51, 109, 0.15);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.ai-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(232, 51, 109, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.ai-card:hover {
    transform: translateY(-4px);
    border-color: rgba(232, 51, 109, 0.4);
    box-shadow: 0 8px 32px rgba(232, 51, 109, 0.15);
}

.ai-icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.ai-title {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 10px;
}

.ai-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* =============================================
   社区功能区块
   ============================================= */
.community-features {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.community-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 20px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.community-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(232, 51, 109, 0.3);
    transform: translateY(-3px);
}

.community-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.community-name {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 6px;
}

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

.community-count {
    display: inline-block;
    margin-top: 8px;
    font-size: 12px;
    color: var(--primary-light);
    background: rgba(232, 51, 109, 0.1);
    padding: 2px 8px;
    border-radius: 10px;
}

/* =============================================
   直播区块
   ============================================= */
.live-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

.live-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
}

.live-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card);
}

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

.live-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.live-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: #FF3B30;
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.live-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: #fff;
    border-radius: 50%;
    animation: pulse 1.5s ease infinite;
}

.live-viewers {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    font-size: 11px;
    padding: 2px 7px;
    border-radius: 4px;
}

.live-info {
    padding: 12px;
}

.live-title {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

/* =============================================
   How-To 加入指南
   ============================================= */
.howto-steps {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    position: relative;
}

.howto-step {
    text-align: center;
    padding: 28px 20px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    position: relative;
    transition: var(--transition);
}

.howto-step:hover {
    border-color: rgba(232, 51, 109, 0.3);
    transform: translateY(-3px);
}

.step-num {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    font-size: 20px;
    font-weight: 900;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    box-shadow: 0 4px 16px rgba(232, 51, 109, 0.3);
}

.step-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}

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

/* =============================================
   数据统计横幅
   ============================================= */
.stats-banner {
    background: linear-gradient(135deg, var(--primary-dark), #6B1E3A);
    padding: 48px 0;
    position: relative;
    overflow: hidden;
}

.stats-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Ccircle cx='30' cy='30' r='20'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
}

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

.stats-num {
    font-size: 42px;
    font-weight: 900;
    color: #fff;
    line-height: 1;
    margin-bottom: 8px;
}

.stats-num span {
    color: var(--accent-light);
}

.stats-label {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
}

/* =============================================
   页脚
   ============================================= */
.site-footer {
    background: #0A0A14;
    border-top: 1px solid var(--border);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

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

.footer-logo-text {
    font-size: 20px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-desc {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 10px;
}

.social-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: var(--transition);
    cursor: pointer;
}

.social-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text-primary);
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 28px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    font-size: 13px;
    color: var(--text-muted);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-copyright {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-copyright a {
    color: var(--primary-light);
}

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

.footer-links-bottom a {
    font-size: 12px;
    color: var(--text-muted);
    transition: var(--transition);
}

.footer-links-bottom a:hover {
    color: var(--text-secondary);
}

/* =============================================
   通知/弹幕效果
   ============================================= */
.danmu-bar {
    background: rgba(0,0,0,0.4);
    border-radius: 24px;
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    overflow: hidden;
    max-width: 500px;
}

.danmu-icon {
    font-size: 16px;
    flex-shrink: 0;
}

.danmu-text {
    font-size: 13px;
    color: rgba(255,255,255,0.8);
    white-space: nowrap;
    animation: scrollText 20s linear infinite;
}

@keyframes scrollText {
    0% { transform: translateX(100%); }
    100% { transform: translateX(-100%); }
}

/* =============================================
   内页Banner
   ============================================= */
.page-banner {
    background: linear-gradient(135deg, var(--secondary), var(--bg-dark));
    padding: 60px 0;
    border-bottom: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(232, 51, 109, 0.1) 0%, transparent 70%);
}

.page-banner-title {
    font-size: clamp(28px, 4vw, 48px);
    font-weight: 900;
    margin-bottom: 12px;
}

.page-banner-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
}

/* =============================================
   加载动画
   ============================================= */
.skeleton {
    background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-hover) 50%, var(--bg-card) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease infinite;
    border-radius: var(--radius-sm);
}

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

/* =============================================
   响应式设计
   ============================================= */
@media (max-width: 1200px) {
    .video-grid-5 { grid-template-columns: repeat(4, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
    .video-grid-5, .video-grid-4 { grid-template-columns: repeat(3, 1fr); }
    .main-nav { display: none; }
    .menu-toggle { display: flex; }
    .header-actions .btn-login { display: none; }
}

@media (max-width: 768px) {
    .section { padding: 48px 0; }
    .video-grid-5, .video-grid-4, .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .hero-section { min-height: 480px; }
    .hero-stats { gap: 24px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-brand { max-width: 100%; }
    .search-hot-tags { display: none; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .expert-grid { grid-template-columns: repeat(2, 1fr); }
    .howto-steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 576px) {
    .video-grid, .video-grid-5, .video-grid-4, .video-grid-3 { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; }
    .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
    .expert-grid { grid-template-columns: 1fr; }
    .howto-steps { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .reviews-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
}

/* =============================================
   移动端菜单
   ============================================= */
.mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.8);
    z-index: 9998;
    backdrop-filter: blur(10px);
}

.mobile-menu.open {
    display: flex;
}

.mobile-menu-panel {
    background: var(--secondary);
    width: 280px;
    height: 100%;
    padding: 20px;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.mobile-menu.open .mobile-menu-panel {
    transform: translateX(0);
}

.mobile-menu-close {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 20px;
}

.mobile-menu-close button {
    background: none;
    color: var(--text-primary);
    font-size: 24px;
    padding: 4px;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mobile-nav-links a {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    display: block;
    transition: var(--transition);
}

.mobile-nav-links a:hover,
.mobile-nav-links a.active {
    background: rgba(232, 51, 109, 0.12);
    color: var(--primary-light);
}

/* =============================================
   视频播放模态框
   ============================================= */
.video-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.9);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.video-modal.open {
    display: flex;
}

.video-modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 20px;
    width: 90%;
    max-width: 900px;
    position: relative;
}

.video-modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    color: #fff;
    font-size: 28px;
    cursor: pointer;
}

.video-player-placeholder {
    aspect-ratio: 16/9;
    background: #000;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 16px;
    color: var(--text-muted);
}

/* =============================================
   滚动条样式
   ============================================= */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: rgba(232, 51, 109, 0.4);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* =============================================
   工具类
   ============================================= */
.text-primary { color: var(--primary) !important; }
.text-accent { color: var(--accent) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.w-full { width: 100%; }
.hidden { display: none !important; }
.visible { display: block !important; }