/*
 * 抖音风 - 全局样式
 * 网站：rvkzcjz.cn
 * 主题：游戏解说 · 视频社区
 * 配色：深夜紫 + 糖果粉 + 电光青
 */

/* =============================================
   CSS 变量
   ============================================= */
:root {
    --primary: #e91e8c;
    --primary-dark: #b5156d;
    --primary-light: #ff6ec7;
    --accent: #7c3aed;
    --accent-light: #a78bfa;
    --cyan: #06b6d4;
    --cyan-light: #67e8f9;
    --bg-dark: #0d0d1a;
    --bg-card: #141428;
    --bg-section: #0f0f20;
    --bg-light: #1a1a35;
    --text-primary: #f0f0ff;
    --text-secondary: #a0a0c0;
    --text-muted: #6060a0;
    --border: rgba(124,58,237,0.25);
    --border-glow: rgba(233,30,140,0.4);
    --white: #ffffff;
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
    --shadow: 0 4px 24px rgba(0,0,0,0.4);
    --shadow-glow: 0 0 30px rgba(233,30,140,0.3);
    --shadow-hover: 0 8px 40px rgba(233,30,140,0.4);
    --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
    --font-main: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
}

/* =============================================
   重置与基础
   ============================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-main);
    background: var(--bg-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(--primary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: var(--font-main); }

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

/* =============================================
   布局工具
   ============================================= */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.section {
    padding: 80px 0;
}
.section-dark { background: var(--bg-section); }
.section-card { background: var(--bg-card); }
.section-title {
    font-size: 2rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 12px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}
.section-title span { color: var(--primary); }
.section-title .accent { color: var(--accent-light); }
.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 50px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
.section-header-line {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    margin: 0 auto 48px;
    border-radius: 2px;
}
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }

/* =============================================
   按钮
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 700;
    transition: var(--transition);
    cursor: pointer;
    white-space: nowrap;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--white);
    box-shadow: 0 4px 20px rgba(233,30,140,0.4);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(233,30,140,0.6);
    color: var(--white);
}
.btn-outline {
    border: 2px solid var(--primary);
    color: var(--primary-light);
    background: transparent;
}
.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}
.btn-ghost {
    border: 1px solid var(--border);
    color: var(--text-secondary);
    background: rgba(255,255,255,0.04);
}
.btn-ghost:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: rgba(233,30,140,0.08);
}
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn-lg { padding: 16px 40px; font-size: 1.05rem; }

/* =============================================
   徽章/标签
   ============================================= */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.03em;
}
.badge-primary {
    background: rgba(233,30,140,0.15);
    border: 1px solid rgba(233,30,140,0.35);
    color: var(--primary-light);
}
.badge-accent {
    background: rgba(124,58,237,0.15);
    border: 1px solid rgba(124,58,237,0.35);
    color: var(--accent-light);
}
.badge-cyan {
    background: rgba(6,182,212,0.15);
    border: 1px solid rgba(6,182,212,0.35);
    color: var(--cyan-light);
}
.badge-live {
    background: #e53e3e;
    color: #fff;
    animation: pulse-live 1.5s infinite;
}
@keyframes pulse-live {
    0%,100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* =============================================
   导航栏
   ============================================= */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(13,13,26,0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}
.site-header.scrolled {
    background: rgba(13,13,26,0.98);
    box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    gap: 20px;
}
.logo-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.logo-img {
    height: 40px;
    width: auto;
    object-fit: contain;
}
.logo-favicon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    object-fit: cover;
}
.logo-text {
    font-size: 1.3rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav-link {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
    color: var(--primary-light);
    background: rgba(233,30,140,0.1);
}
.header-search {
    flex: 1;
    max-width: 320px;
    position: relative;
}
.header-search input {
    width: 100%;
    padding: 9px 40px 9px 16px;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border);
    border-radius: 50px;
    color: var(--text-primary);
    font-size: 0.88rem;
    outline: none;
    transition: var(--transition);
    font-family: var(--font-main);
}
.header-search input::placeholder { color: var(--text-muted); }
.header-search input:focus {
    border-color: var(--primary);
    background: rgba(233,30,140,0.06);
    box-shadow: 0 0 0 3px rgba(233,30,140,0.12);
}
.header-search .search-btn {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.9rem;
    padding: 0;
}
.header-search .search-btn:hover { color: var(--primary); }
.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    cursor: pointer;
}
.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* =============================================
   搜索建议下拉
   ============================================= */
.search-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
    z-index: 200;
    box-shadow: var(--shadow);
}
.search-dropdown.show { display: block; }
.search-hot-title {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    font-weight: 600;
}
.search-hot-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.search-hot-tag {
    padding: 4px 10px;
    background: rgba(124,58,237,0.15);
    border: 1px solid rgba(124,58,237,0.25);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--accent-light);
    cursor: pointer;
    transition: var(--transition);
}
.search-hot-tag:hover {
    background: rgba(233,30,140,0.15);
    border-color: var(--primary);
    color: var(--primary-light);
}

/* =============================================
   通知栏
   ============================================= */
.notice-bar {
    background: linear-gradient(90deg, var(--accent), var(--primary));
    padding: 8px 0;
    overflow: hidden;
}
.notice-bar-inner {
    display: flex;
    align-items: center;
    gap: 16px;
}
.notice-label {
    flex-shrink: 0;
    background: rgba(255,255,255,0.2);
    padding: 2px 10px;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 700;
    color: #fff;
}
.notice-scroll {
    overflow: hidden;
    flex: 1;
}
.notice-text {
    color: rgba(255,255,255,0.9);
    font-size: 0.85rem;
    white-space: nowrap;
    animation: marquee 30s linear infinite;
    display: inline-block;
}
@keyframes marquee {
    0% { transform: translateX(100vw); }
    100% { transform: translateX(-100%); }
}

/* =============================================
   Hero 首屏
   ============================================= */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/hero_banner.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(13,13,26,0.95) 0%,
        rgba(13,13,26,0.75) 50%,
        rgba(124,58,237,0.3) 100%
    );
}
.hero-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}
.hero-particles::before,
.hero-particles::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
}
.hero-particles::before {
    width: 600px;
    height: 600px;
    background: var(--accent);
    top: -200px;
    right: -100px;
    animation: float-orb 8s ease-in-out infinite;
}
.hero-particles::after {
    width: 400px;
    height: 400px;
    background: var(--primary);
    bottom: -100px;
    left: 10%;
    animation: float-orb 10s ease-in-out infinite reverse;
}
@keyframes float-orb {
    0%,100% { transform: translateY(0) scale(1); }
    50% { transform: translateY(-40px) scale(1.1); }
}
.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
    padding: 120px 0 80px;
}
.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(233,30,140,0.12);
    border: 1px solid rgba(233,30,140,0.3);
    color: var(--primary-light);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: 0.05em;
}
.hero-eyebrow .dot {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse-live 1.5s infinite;
}
.hero h1 {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--white);
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
}
.hero h1 .highlight {
    background: linear-gradient(135deg, var(--primary), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.75);
    margin-bottom: 36px;
    line-height: 1.8;
    max-width: 560px;
}
.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}
.hero-stats {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}
.hero-stat-item {
    text-align: center;
}
.hero-stat-num {
    font-size: 1.8rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 4px;
}
.hero-stat-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 600;
    letter-spacing: 0.05em;
}
.hero-scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
    font-size: 0.75rem;
    animation: bounce-down 2s infinite;
}
.hero-scroll-hint::after {
    content: '';
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--primary), transparent);
}
@keyframes bounce-down {
    0%,100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* =============================================
   数据统计横条
   ============================================= */
.stats-strip {
    background: linear-gradient(135deg, var(--bg-card), var(--bg-light));
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 0;
}
.stats-strip-inner {
    display: flex;
    align-items: stretch;
}
.stat-strip-item {
    flex: 1;
    padding: 28px 20px;
    text-align: center;
    border-right: 1px solid var(--border);
    transition: var(--transition);
}
.stat-strip-item:last-child { border-right: none; }
.stat-strip-item:hover { background: rgba(233,30,140,0.05); }
.stat-strip-num {
    font-size: 2rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    margin-bottom: 4px;
}
.stat-strip-label {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 600;
}

/* =============================================
   视频卡片
   ============================================= */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}
.video-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
}
.video-card:hover {
    transform: translateY(-6px);
    border-color: var(--primary);
    box-shadow: var(--shadow-hover);
}
.video-thumb {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
    background: var(--bg-dark);
}
.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); }
.video-play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0);
    transition: var(--transition);
    opacity: 0;
}
.video-card:hover .video-play-btn {
    opacity: 1;
    background: rgba(0,0,0,0.45);
}
.play-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 30px rgba(233,30,140,0.6);
    transform: scale(0.8);
    transition: var(--transition);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
    content: '';
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 10px 0 10px 18px;
    border-color: transparent transparent transparent #fff;
    margin-left: 4px;
}
.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 4px;
}
.video-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
}
.video-badge-hot {
    background: linear-gradient(135deg, #ff4500, #ff8c00);
}
.video-badge-new {
    background: linear-gradient(135deg, var(--cyan), #0ea5e9);
}
.video-info {
    padding: 14px;
}
.video-title {
    font-size: 0.92rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.video-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--text-muted);
}
.video-author {
    display: flex;
    align-items: center;
    gap: 6px;
}
.author-avatar {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    flex-shrink: 0;
}
.video-stats {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 8px;
}
.video-stats span {
    display: flex;
    align-items: center;
    gap: 3px;
}

/* =============================================
   分类标签
   ============================================= */
.cat-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 32px;
    justify-content: center;
}
.cat-tab {
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 0.88rem;
    font-weight: 600;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    background: rgba(255,255,255,0.03);
    transition: var(--transition);
    cursor: pointer;
}
.cat-tab:hover, .cat-tab.active {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(233,30,140,0.35);
}

/* =============================================
   今日热播排行榜
   ============================================= */
.rank-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
}
.rank-header {
    padding: 20px 24px;
    background: linear-gradient(135deg, rgba(233,30,140,0.15), rgba(124,58,237,0.15));
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.rank-title {
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}
.rank-list {
    padding: 8px 0;
}
.rank-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 24px;
    transition: var(--transition);
    cursor: pointer;
}
.rank-item:hover { background: rgba(233,30,140,0.06); }
.rank-num {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.78rem;
    font-weight: 900;
    flex-shrink: 0;
}
.rank-num.top1 { background: linear-gradient(135deg, #ffd700, #ff8c00); color: #fff; }
.rank-num.top2 { background: linear-gradient(135deg, #c0c0c0, #808080); color: #fff; }
.rank-num.top3 { background: linear-gradient(135deg, #cd7f32, #8b4513); color: #fff; }
.rank-num.other { background: var(--bg-light); color: var(--text-muted); }
.rank-info { flex: 1; min-width: 0; }
.rank-name {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 2px;
}
.rank-views {
    font-size: 0.75rem;
    color: var(--text-muted);
}
.rank-trend {
    font-size: 0.78rem;
    font-weight: 700;
}
.rank-trend.up { color: #22c55e; }
.rank-trend.hot { color: var(--primary); }

/* =============================================
   专家展示
   ============================================= */
.expert-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: 28px 24px;
    text-align: center;
    transition: var(--transition);
}
.expert-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}
.expert-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 auto 16px;
    border: 3px solid var(--primary);
    box-shadow: 0 0 20px rgba(233,30,140,0.3);
}
.expert-name {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4px;
}
.expert-title {
    font-size: 0.82rem;
    color: var(--primary-light);
    font-weight: 600;
    margin-bottom: 12px;
}
.expert-desc {
    font-size: 0.85rem;
    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 {
    padding: 3px 10px;
    background: rgba(124,58,237,0.15);
    border: 1px solid rgba(124,58,237,0.25);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--accent-light);
}
.expert-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
}

/* =============================================
   AI赋能模块
   ============================================= */
.ai-grid {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 20px;
}
.ai-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: 28px 24px;
    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));
    opacity: 0;
    transition: var(--transition);
}
.ai-card:hover::before { opacity: 1; }
.ai-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(124,58,237,0.25);
}
.ai-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, rgba(124,58,237,0.2), rgba(233,30,140,0.2));
    border: 1px solid rgba(124,58,237,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 16px;
}
.ai-title {
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.ai-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* =============================================
   社区功能
   ============================================= */
.community-grid {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 16px;
}
.community-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: 24px 16px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}
.community-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}
.community-icon {
    font-size: 2.5rem;
    margin-bottom: 12px;
    display: block;
}
.community-name {
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 6px;
}
.community-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.5;
}
.community-count {
    font-size: 0.78rem;
    color: var(--primary-light);
    font-weight: 700;
    margin-top: 8px;
}

/* =============================================
   合作品牌Logo墙
   ============================================= */
.partner-wall {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    align-items: center;
}
.partner-logo {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 28px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-secondary);
    transition: var(--transition);
    white-space: nowrap;
}
.partner-logo:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: rgba(233,30,140,0.06);
}

/* =============================================
   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: var(--primary);
    box-shadow: 0 0 20px rgba(233,30,140,0.15);
}
.faq-question {
    width: 100%;
    text-align: left;
    padding: 18px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
    background: none;
    font-family: var(--font-main);
    transition: var(--transition);
}
.faq-question:hover { color: var(--primary-light); }
.faq-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(233,30,140,0.15);
    border: 1px solid rgba(233,30,140,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.9rem;
    color: var(--primary-light);
    transition: var(--transition);
}
.faq-item.open .faq-icon {
    background: var(--primary);
    color: #fff;
    transform: rotate(45deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 20px;
}
.faq-item.open .faq-answer {
    max-height: 400px;
    padding: 0 20px 18px;
}
.faq-answer p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* =============================================
   用户评价
   ============================================= */
.review-grid {
    display: grid;
    grid-template-columns: repeat(3,1fr);
    gap: 20px;
}
.review-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: 24px;
    transition: var(--transition);
    position: relative;
}
.review-card:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
}
.review-card::before {
    content: '"';
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 3rem;
    color: rgba(233,30,140,0.15);
    font-family: Georgia, serif;
    line-height: 1;
}
.review-stars {
    display: flex;
    gap: 3px;
    margin-bottom: 12px;
}
.review-stars span { color: #fbbf24; font-size: 0.9rem; }
.review-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}
.review-user {
    display: flex;
    align-items: center;
    gap: 10px;
}
.review-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
}
.review-name {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-primary);
}
.review-date {
    font-size: 0.75rem;
    color: var(--text-muted);
}
.review-game-tag {
    font-size: 0.75rem;
    color: var(--primary-light);
    background: rgba(233,30,140,0.1);
    padding: 2px 8px;
    border-radius: 50px;
    margin-left: auto;
}

/* =============================================
   How-To 加入社区
   ============================================= */
.howto-steps {
    display: grid;
    grid-template-columns: repeat(4,1fr);
    gap: 20px;
    position: relative;
}
.howto-steps::before {
    content: '';
    position: absolute;
    top: 32px;
    left: 12%;
    right: 12%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0.3;
}
.howto-step {
    text-align: center;
    position: relative;
}
.step-num {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 900;
    color: #fff;
    margin: 0 auto 16px;
    box-shadow: 0 4px 20px rgba(233,30,140,0.4);
    position: relative;
    z-index: 1;
}
.step-title {
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.step-desc {
    font-size: 0.83rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* =============================================
   联系我们
   ============================================= */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}
.contact-info-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: 32px;
}
.contact-info-title {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}
.contact-item:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.contact-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: rgba(233,30,140,0.12);
    border: 1px solid rgba(233,30,140,0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}
.contact-label {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 3px;
}
.contact-value {
    font-size: 0.92rem;
    color: var(--text-primary);
    font-weight: 600;
}
.qr-group {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
}
.qr-item {
    text-align: center;
}
.qr-item img {
    width: 120px;
    height: 120px;
    border-radius: var(--radius);
    border: 2px solid var(--border);
    margin: 0 auto 8px;
}
.qr-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

/* =============================================
   社交分享
   ============================================= */
.share-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}
.share-label {
    font-size: 0.88rem;
    color: var(--text-muted);
    font-weight: 600;
}
.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 700;
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    background: rgba(255,255,255,0.03);
}
.share-btn:hover { transform: translateY(-2px); }
.share-wechat:hover { border-color: #07c160; color: #07c160; background: rgba(7,193,96,0.08); }
.share-weibo:hover { border-color: #e6162d; color: #e6162d; background: rgba(230,22,45,0.08); }
.share-douyin:hover { border-color: #fe2c55; color: #fe2c55; background: rgba(254,44,85,0.08); }
.share-bilibili:hover { border-color: #00a1d6; color: #00a1d6; background: rgba(0,161,214,0.08); }

/* =============================================
   面包屑
   ============================================= */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    padding: 12px 0;
    flex-wrap: wrap;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb .sep { color: var(--text-muted); opacity: 0.4; }
.breadcrumb .current { color: var(--text-secondary); }

/* =============================================
   内页Hero
   ============================================= */
.page-hero {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-light) 100%);
    border-bottom: 1px solid var(--border);
    padding: 100px 0 48px;
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(124,58,237,0.2) 0%, transparent 70%);
    pointer-events: none;
}
.page-hero-title {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}
.page-hero-title span { color: var(--primary); }
.page-hero-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 560px;
    line-height: 1.7;
    margin-bottom: 16px;
}
.page-update-time {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--text-muted);
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    padding: 4px 12px;
    border-radius: 50px;
}

/* =============================================
   标签云
   ============================================= */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}
.tag-item {
    padding: 6px 14px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    transition: var(--transition);
    cursor: pointer;
}
.tag-item:hover {
    background: rgba(233,30,140,0.1);
    border-color: var(--primary);
    color: var(--primary-light);
}

/* =============================================
   加载更多
   ============================================= */
.load-more-wrap {
    text-align: center;
    margin-top: 40px;
}

/* =============================================
   页脚
   ============================================= */
.site-footer {
    background: var(--bg-card);
    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 .logo-text {
    font-size: 1.4rem;
    margin-bottom: 12px;
    display: block;
}
.footer-desc {
    font-size: 0.88rem;
    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: var(--radius-sm);
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: var(--transition);
    cursor: pointer;
}
.social-btn:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: rgba(233,30,140,0.1);
}
.footer-col-title {
    font-size: 0.9rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: 0.03em;
}
.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-links a {
    font-size: 0.85rem;
    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: 0.82rem;
    color: var(--text-muted);
}
.footer-copyright a { color: var(--text-muted); }
.footer-copyright a:hover { color: var(--primary-light); }
.footer-icp {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}
.footer-icp a { color: var(--text-muted); }
.footer-icp a:hover { color: var(--primary-light); }
.footer-update {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* =============================================
   滚动动画
   ============================================= */
.js-loaded .fade-up {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.js-loaded .fade-up.visible,
.fade-up {
    opacity: 1;
    transform: translateY(0);
}

/* =============================================
   响应式 - 平板
   ============================================= */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2,1fr); }
    .ai-grid { grid-template-columns: repeat(2,1fr); }
    .community-grid { grid-template-columns: repeat(2,1fr); }
    .howto-steps { grid-template-columns: repeat(2,1fr); }
    .howto-steps::before { display: none; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .hero h1 { font-size: 2.8rem; }
}

/* =============================================
   响应式 - 手机
   ============================================= */
@media (max-width: 768px) {
    .section { padding: 56px 0; }
    .section-title { font-size: 1.6rem; }
    .hero h1 { font-size: 2rem; }
    .hero-desc { font-size: 0.95rem; }
    .hero-stats { gap: 20px; }
    .hero-stat-num { font-size: 1.4rem; }
    .main-nav { display: none; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: var(--bg-card); border-bottom: 1px solid var(--border); padding: 16px; gap: 4px; }
    .main-nav.open { display: flex; }
    .mobile-menu-btn { display: flex; }
    .header-search { display: none; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .ai-grid { grid-template-columns: 1fr; }
    .community-grid { grid-template-columns: repeat(2,1fr); }
    .review-grid { grid-template-columns: 1fr; }
    .howto-steps { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .stats-strip-inner { flex-wrap: wrap; }
    .stat-strip-item { flex: 0 0 50%; border-bottom: 1px solid var(--border); }
    .video-grid { grid-template-columns: repeat(2,1fr); gap: 12px; }
    .page-hero { padding: 90px 0 36px; }
    .page-hero-title { font-size: 1.6rem; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; justify-content: center; }
}
@media (max-width: 480px) {
    .video-grid { grid-template-columns: 1fr; }
    .community-grid { grid-template-columns: 1fr; }
    .cat-tabs { gap: 6px; }
    .cat-tab { padding: 6px 14px; font-size: 0.82rem; }
    .hero h1 { font-size: 1.7rem; }
}