/* =============================================
   黑丝 - 主样式文件
   原创设计 © 2025 黑丝
   域名: kemiqzvq.cn
   ============================================= */

/* CSS变量 - 原创配色方案 */
:root {
    --primary: #7C3AED;
    --primary-dark: #5B21B6;
    --primary-light: #A78BFA;
    --accent: #EC4899;
    --accent-dark: #BE185D;
    --accent-light: #F9A8D4;
    --gold: #F59E0B;
    --gold-light: #FDE68A;
    --dark: #0F0A1E;
    --dark-2: #1A1030;
    --dark-3: #241840;
    --dark-4: #2D1F52;
    --text-primary: #F3F0FF;
    --text-secondary: #C4B5FD;
    --text-muted: #8B7EC8;
    --border: rgba(124, 58, 237, 0.3);
    --card-bg: rgba(26, 16, 48, 0.85);
    --glass: rgba(124, 58, 237, 0.1);
    --shadow: 0 8px 32px rgba(124, 58, 237, 0.3);
    --shadow-accent: 0 8px 32px rgba(236, 72, 153, 0.3);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    background-color: var(--dark);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--accent-light);
}

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

ul, ol {
    list-style: none;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--dark-2);
}
::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 3px;
}

/* =============================================
   顶部公告栏
   ============================================= */
.top-bar {
    background: linear-gradient(90deg, var(--primary-dark), var(--accent-dark));
    color: #fff;
    text-align: center;
    padding: 8px 20px;
    font-size: 13px;
    letter-spacing: 0.5px;
}

.top-bar a {
    color: var(--gold-light);
    font-weight: 600;
}

/* =============================================
   头部导航
   ============================================= */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(15, 10, 30, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

.header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    gap: 20px;
}

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

.site-logo img {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary);
}

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

/* 主导航 */
.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    justify-content: center;
}

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

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

.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 1px;
}

/* 搜索框 */
.header-search {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 0 16px;
    height: 38px;
    gap: 8px;
    min-width: 200px;
    transition: var(--transition);
}

.header-search:focus-within {
    border-color: var(--primary);
    background: rgba(124, 58, 237, 0.1);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.header-search input {
    background: none;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 14px;
    width: 100%;
}

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

.search-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    padding: 0;
    transition: var(--transition);
}

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

/* 汉堡菜单 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    background: none;
    border: none;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: var(--transition);
}

/* =============================================
   搜索结果提示
   ============================================= */
.search-overlay {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(15,10,30,0.98);
    border-bottom: 1px solid var(--border);
    padding: 20px;
    z-index: 999;
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
}

/* =============================================
   面包屑
   ============================================= */
.breadcrumb {
    background: var(--dark-2);
    border-bottom: 1px solid var(--border);
    padding: 10px 0;
}

.breadcrumb-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
}

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

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

.breadcrumb-inner span {
    color: var(--text-secondary);
}

.bc-sep {
    color: var(--border);
}

/* =============================================
   Hero Banner
   ============================================= */
.hero-banner {
    position: relative;
    min-height: 580px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    filter: brightness(0.45);
    transform: scale(1.05);
    transition: transform 8s ease;
}

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

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(91,33,182,0.7) 0%, rgba(15,10,30,0.4) 50%, rgba(190,24,93,0.5) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1280px;
    margin: 0 auto;
    padding: 80px 20px;
    width: 100%;
}

.j2hq7e {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(124,58,237,0.3);
    border: 1px solid var(--primary);
    color: var(--primary-light);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
}

.j2hq7e::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-size: clamp(32px, 5vw, 60px);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 16px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

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

.hero-desc {
    font-size: clamp(15px, 2vw, 18px);
    color: rgba(255,255,255,0.85);
    max-width: 600px;
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    gap: 32px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

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

.hero-stat .num {
    font-size: 28px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--gold), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
}

.hero-stat .label {
    font-size: 12px;
    color: rgba(255,255,255,0.6);
}

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

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    padding: 14px 28px;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(124,58,237,0.5);
    color: #fff;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: #fff;
    padding: 13px 28px;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 600;
    border: 2px solid rgba(255,255,255,0.4);
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline:hover {
    border-color: var(--primary-light);
    background: rgba(124,58,237,0.2);
    color: var(--primary-light);
    transform: translateY(-2px);
}

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

.section {
    padding: 70px 0;
}

.section-alt {
    background: var(--dark-2);
}

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

.pehyjcf {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(24px, 3.5vw, 38px);
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.3;
}

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

.section-desc {
    color: var(--text-muted);
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* =============================================
   视频卡片
   ============================================= */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

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

.video-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--dark-3);
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.play-overlay {
    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-overlay {
    opacity: 1;
}

.play-btn {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 30px rgba(124,58,237,0.6);
    transform: scale(0.8);
    transition: var(--transition);
}

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

.play-btn svg {
    width: 24px;
    height: 24px;
    fill: #fff;
    margin-left: 3px;
}

.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.8);
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.video-tag {
    position: absolute;
    top: 8px;
    left: 8px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
}

.video-info {
    padding: 16px;
}

.video-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.video-meta .views { color: var(--primary-light); }
.video-meta .likes { color: var(--accent-light); }
.video-meta .comments { color: var(--gold); }

/* =============================================
   分类导航标签
   ============================================= */
.cat-tabs {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.cat-tab {
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    transition: var(--transition);
}

.cat-tab:hover,
.cat-tab.active {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-color: transparent;
    color: #fff;
}

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

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

.expert-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.expert-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 16px;
    border: 3px solid var(--primary);
    overflow: hidden;
    background: var(--dark-3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.expert-name {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

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

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

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

.8d6k9gwq {
    background: rgba(245,158,11,0.15);
    border: 1px solid rgba(245,158,11,0.3);
    color: var(--gold);
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
}

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

.btn-sm {
    padding: 7px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
}

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

.btn-sm.primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-color: transparent;
    color: #fff;
}

/* =============================================
   FAQ 模块
   ============================================= */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

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

.faq-item.open {
    border-color: var(--primary);
}

.faq-question {
    padding: 18px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    gap: 12px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    user-select: none;
}

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

.faq-icon {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    color: var(--primary-light);
    font-size: 16px;
    font-weight: 700;
}

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

.faq-answer {
    display: none;
    padding: 0 20px 18px;
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.8;
    border-top: 1px solid var(--border);
    padding-top: 16px;
}

.faq-item.open .faq-answer {
    display: block;
}

/* =============================================
   用户评论
   ============================================= */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

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

.review-card:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
}

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

.review-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: 18px;
    flex-shrink: 0;
}

.review-user-info .name {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.review-user-info .game {
    font-size: 12px;
    color: var(--accent-light);
}

.review-stars {
    color: var(--gold);
    font-size: 14px;
    margin-bottom: 10px;
}

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

.review-date {
    font-size: 12px;
    color: var(--text-muted);
    opacity: 0.6;
}

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

.partner-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    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: var(--primary);
    color: var(--primary-light);
    transform: translateY(-2px);
}

/* =============================================
   AI赋能模块
   ============================================= */
.ai-features {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.ai-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.ai-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.ai-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.ai-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 18px;
}

.ai-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.ai-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
}

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

.community-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px 16px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.community-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-accent);
}

.community-icon {
    font-size: 40px;
    margin-bottom: 12px;
    display: block;
}

.community-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.community-count {
    font-size: 12px;
    color: var(--accent-light);
}

/* =============================================
   联系我们
   ============================================= */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.contact-info h3 {
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.contact-item {
    display: flex;
    gap: 14px;
    margin-bottom: 18px;
    align-items: flex-start;
}

.contact-icon {
    width: 40px;
    height: 40px;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.contact-text .label {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.contact-text .value {
    font-size: 15px;
    color: var(--text-primary);
    font-weight: 600;
}

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

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

.qr-box {
    width: 120px;
    height: 120px;
    background: #fff;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
    overflow: hidden;
}

.qr-box canvas {
    display: block;
}

.qr-label {
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
}

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

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--glass);
    color: var(--text-secondary);
    transition: var(--transition);
}

.share-btn:hover {
    transform: translateY(-2px);
}

.share-btn.wechat:hover { background: #07C160; border-color: #07C160; color: #fff; }
.share-btn.weibo:hover { background: #E6162D; border-color: #E6162D; color: #fff; }
.share-btn.douyin:hover { background: #000; border-color: #69C9D0; color: #69C9D0; }
.share-btn.bilibili:hover { background: #00A1D6; border-color: #00A1D6; color: #fff; }
.share-btn.qq:hover { background: #12B7F5; border-color: #12B7F5; color: #fff; }

/* =============================================
   页脚
   ============================================= */
.site-footer {
    background: var(--dark-2);
    border-top: 1px solid var(--border);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
    margin-bottom: 40px;
}

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

.footer-brand img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.footer-brand .brand-name {
    font-size: 18px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

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

.social-link {
    width: 36px;
    height: 36px;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--text-muted);
    transition: var(--transition);
}

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

.footer-col h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

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

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

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

.footer-bottom {
    background: var(--dark);
    border-top: 1px solid var(--border);
    padding: 20px;
    text-align: center;
}

.footer-bottom-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: var(--text-muted);
}

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

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

.update-time {
    color: var(--primary-light);
    font-size: 12px;
}

/* =============================================
   内页 Hero
   ============================================= */
.page-hero {
    background: linear-gradient(135deg, var(--dark-2), var(--dark-3));
    border-bottom: 1px solid var(--border);
    padding: 60px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(ellipse at center, rgba(124,58,237,0.15) 0%, transparent 60%);
    pointer-events: none;
}

.page-hero h1 {
    font-size: clamp(28px, 4vw, 48px);
    font-weight: 900;
    margin-bottom: 12px;
}

.page-hero p {
    color: var(--text-muted);
    font-size: 16px;
    max-width: 600px;
    margin: 0 auto;
}

/* =============================================
   加载动画
   ============================================= */
.lazy-img {
    opacity: 0;
    transition: opacity 0.5s ease;
}

.lazy-img.loaded {
    opacity: 1;
}

/* =============================================
   视频模态框
   ============================================= */
.video-modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.9);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

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

.modal-inner {
    background: var(--dark-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 800px;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.modal-video {
    aspect-ratio: 16/9;
    background: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
}

/* =============================================
   响应式
   ============================================= */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(15,10,30,0.98);
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border);
        gap: 4px;
    }

    .main-nav.open {
        display: flex;
    }

    .main-nav a {
        width: 100%;
        text-align: center;
        padding: 12px;
    }

    .menu-toggle {
        display: flex;
    }

    .header-search {
        display: none;
    }

    .hero-banner {
        min-height: 420px;
    }

    .hero-stats {
        gap: 20px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom-inner {
        flex-direction: column;
        text-align: center;
    }

    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    }
}

@media (max-width: 480px) {
    .hero-btns {
        flex-direction: column;
    }

    .hero-stats {
        gap: 16px;
    }

    .hero-stat .num {
        font-size: 22px;
    }
}

/* =============================================
   工具类
   ============================================= */
.text-center { text-align: center; }
.text-gradient {
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mb-4 { margin-bottom: 16px; }
.mb-8 { margin-bottom: 32px; }

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

.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* 发光效果 */
.glow {
    box-shadow: 0 0 20px rgba(124,58,237,0.4);
}

.glow-accent {
    box-shadow: 0 0 20px rgba(236,72,153,0.4);
}

/* =============================================
   通用按钮
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
}

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

.btn.primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-color: transparent;
    color: #fff;
    box-shadow: var(--shadow);
}

.btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(124,58,237,0.5);
    color: #fff;
}

/* =============================================
   AI功能标签
   ============================================= */
.ai-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.feature-tag {
    background: rgba(124,58,237,0.15);
    border: 1px solid var(--border);
    color: var(--primary-light);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

/* =============================================
   AI卡片网格
   ============================================= */
.ai-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

/* =============================================
   滚动动画初始状态
   ============================================= */
.video-card,
.ai-card,
.expert-card,
.review-card,
.community-card {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.3s, box-shadow 0.3s;
}

.video-card.visible,
.ai-card.visible,
.expert-card.visible,
.review-card.visible,
.community-card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* =============================================
   打印样式
   ============================================= */
@media print {
    .top-bar, .site-header, .site-footer, .video-modal { display: none; }
    body { background: #fff; color: #000; }
}