/**
 * 陈美娇 - 主样式文件
 * 品牌: 陈美娇 | 域名: ktpnlis.cn
 * 原创设计，全站深色主题
 */

/* ===== CSS变量 ===== */
:root {
    --primary: #EC4899;
    --primary-dark: #EC4899;
    --secondary: #F43F5E;
    --accent: #FFD166;
    --dark-1: #0D0D1A;
    --dark-2: #12121F;
    --dark-3: #1A1A2E;
    --card-bg: #161625;
    --border: rgba(255,255,255,0.08);
    --text-main: #E8EAF0;
    --text-muted: #9BA3B8;
    --gradient-1: linear-gradient(135deg, #EC4899 0%, #F43F5E 100%);
    --gradient-2: linear-gradient(135deg, #6C63FF 0%, #EC4899 100%);
    --radius: 14px;
    --radius-sm: 8px;
    --transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
    --shadow-card: 0 4px 20px rgba(0,0,0,0.3);
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--dark-1);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { opacity: 0.85; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1,h2,h3,h4,h5,h6 { line-height: 1.3; font-weight: 700; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

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

/* ===== 顶部公告栏 ===== */
.top-bar {
    background: var(--gradient-1);
    color: #fff;
    text-align: center;
    padding: 8px 20px;
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}
.top-bar a {
    color: #fff;
    background: rgba(255,255,255,0.2);
    padding: 2px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}
.top-bar a:hover { background: rgba(255,255,255,0.35); opacity: 1; }

/* ===== 导航栏 ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(13,13,26,0.96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow 0.3s;
}
.navbar-inner {
    display: flex;
    align-items: center;
    gap: 16px;
    height: 64px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}
.navbar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}
.navbar-brand .favicon { width: 32px; height: 32px; border-radius: 6px; }
.navbar-brand .logo-img { height: 34px; width: auto; }
.navbar-nav {
    display: flex;
    align-items: center;
    gap: 2px;
    flex: 1;
    overflow-x: auto;
    scrollbar-width: none;
}
.navbar-nav::-webkit-scrollbar { display: none; }
.nav-item a {
    display: block;
    padding: 6px 12px;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    white-space: nowrap;
    transition: var(--transition);
}
.nav-item a:hover, .nav-item a.active {
    color: #fff;
    background: rgba(255,255,255,0.08);
    opacity: 1;
}
.navbar-search {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.07);
    border: 1px solid var(--border);
    border-radius: 24px;
    overflow: hidden;
    transition: var(--transition);
    flex-shrink: 0;
}
.navbar-search:focus-within {
    border-color: rgba(236,72,153,0.5);
    background: rgba(255,255,255,0.1);
}
.search-input {
    background: none;
    border: none;
    outline: none;
    color: var(--text-main);
    font-size: 13px;
    padding: 8px 14px;
    width: 180px;
}
.search-input::placeholder { color: var(--text-muted); }
.search-btn {
    padding: 8px 14px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    transition: var(--transition);
}
.search-btn:hover { color: var(--primary); }
.navbar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.btn-login {
    padding: 7px 16px;
    color: var(--text-main);
    font-size: 13px;
    font-weight: 600;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.05);
    transition: var(--transition);
}
.btn-login:hover { border-color: rgba(236,72,153,0.4); color: var(--primary); }
.btn-join {
    padding: 7px 18px;
    background: var(--gradient-1);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    border-radius: 20px;
    transition: var(--transition);
}
.btn-join:hover { opacity: 0.9; transform: translateY(-1px); }
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    cursor: pointer;
}
.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== 移动端菜单 ===== */
.mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    z-index: 2000;
    backdrop-filter: blur(4px);
}
.mobile-menu.open { display: block; }
.mobile-menu-inner {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    background: var(--dark-3);
    padding: 24px 20px;
    overflow-y: auto;
    border-right: 1px solid var(--border);
}
.mobile-menu-close {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 24px;
    color: var(--text-muted);
    background: none;
    border: none;
    cursor: pointer;
}
.mobile-nav-links { display: flex; flex-direction: column; gap: 4px; }
.mobile-nav-links a {
    display: block;
    padding: 12px 16px;
    color: var(--text-main);
    font-size: 15px;
    border-radius: 10px;
    transition: var(--transition);
}
.mobile-nav-links a:hover { background: rgba(236,72,153,0.1); color: var(--primary); opacity: 1; }

/* ===== Hero 区域 ===== */
.hero {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: 60px 0 100px;
}
.hero-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 60% 50%, rgba(236,72,153,0.18) 0%, transparent 60%),
                radial-gradient(ellipse at 20% 80%, rgba(108,99,255,0.12) 0%, transparent 50%),
                var(--dark-1);
}
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, var(--dark-1) 100%);
}
.hero .container { position: relative; z-index: 1; }
.hero-content { max-width: 680px; }
.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(236,72,153,0.15);
    border: 1px solid rgba(236,72,153,0.3);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}
.hero h1 {
    font-size: clamp(32px, 5vw, 52px);
    font-weight: 900;
    color: #fff;
    margin-bottom: 18px;
    letter-spacing: -0.5px;
    line-height: 1.2;
}
.hero h1 span {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero p {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 28px;
    line-height: 1.7;
    max-width: 560px;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--gradient-1);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    border-radius: 30px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    text-decoration: none;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(236,72,153,0.4); opacity: 1; }
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 13px 26px;
    border: 1.5px solid rgba(255,255,255,0.2);
    color: var(--text-main);
    font-size: 15px;
    font-weight: 600;
    border-radius: 30px;
    transition: var(--transition);
    text-decoration: none;
}
.btn-outline:hover { border-color: rgba(236,72,153,0.5); color: var(--primary); opacity: 1; }
.hero-stats {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(22,22,37,0.85);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: center;
    gap: 0;
}
.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px 48px;
    border-right: 1px solid var(--border);
}
.stat-item:last-child { border-right: none; }
.stat-item .num {
    font-size: 24px;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-item .label { font-size: 12px; color: var(--text-muted); margin-top: 2px; }

/* ===== 热门标签 ===== */
.hot-tags {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.hot-tags .label { font-size: 13px; color: var(--text-muted); white-space: nowrap; }
.tag {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 12px;
    border-radius: 20px;
    transition: var(--transition);
    white-space: nowrap;
}
.tag:hover { background: rgba(236,72,153,0.12); border-color: rgba(236,72,153,0.3); color: var(--primary); opacity: 1; }

/* ===== Section ===== */
.section { padding: 60px 0; }
.section-sm { padding: 32px 0; }
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    gap: 16px;
}
.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
}
.title-bar {
    width: 4px;
    height: 24px;
    background: var(--gradient-1);
    border-radius: 2px;
    flex-shrink: 0;
}
.title-icon { font-size: 22px; }
.section-title h2 {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
}
.view-all {
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    padding: 6px 14px;
    border: 1px solid rgba(236,72,153,0.3);
    border-radius: 20px;
    transition: var(--transition);
}
.view-all:hover { background: rgba(236,72,153,0.1); opacity: 1; }

/* ===== 分类标签 ===== */
.category-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 24px;
}
.cat-tab {
    padding: 7px 18px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 13px;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
}
.cat-tab:hover { color: var(--primary); border-color: rgba(236,72,153,0.3); }
.cat-tab.active {
    background: var(--gradient-1);
    border-color: transparent;
    color: #fff;
    font-weight: 600;
}

/* ===== 视频网格 ===== */
.video-grid { display: grid; gap: 20px; }
.video-grid-4 { grid-template-columns: repeat(4, 1fr); }
.video-grid-3 { grid-template-columns: repeat(3, 1fr); }

/* ===== 视频卡片 ===== */
.video-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}
.video-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: rgba(236,72,153,0.25);
}
.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 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.video-play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0);
    transition: background 0.25s;
    opacity: 0;
}
.video-card:hover .video-play-btn { opacity: 1; background: rgba(0,0,0,0.35); }
.play-icon {
    width: 52px;
    height: 52px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(236,72,153,0.5);
    transition: transform 0.2s;
}
.play-icon:hover { transform: scale(1.1); }
.play-icon svg {
    width: 20px;
    height: 20px;
    fill: #fff;
    margin-left: 3px;
}
.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}
.video-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
    letter-spacing: 0.5px;
}
.video-badge.hot { background: var(--primary); color: #fff; }
.video-badge.new { background: #06D6A0; color: #fff; }
.video-badge.vip { background: var(--accent); color: #1A1A2E; }
.video-info { padding: 14px; }
.video-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}
.video-meta {
    display: flex;
    gap: 12px;
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 8px;
}
.video-author {
    display: flex;
    align-items: center;
    gap: 8px;
}
.author-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}
.author-name { font-size: 12px; color: var(--text-muted); }

/* ===== 直播标签 ===== */
.live-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(236,72,153,0.9);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 4px;
}
.live-dot {
    width: 6px;
    height: 6px;
    background: #fff;
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

/* ===== AI 卡片 ===== */
.ai-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ai-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: var(--transition);
}
.ai-card:hover {
    border-color: rgba(236,72,153,0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}
.ai-icon { font-size: 36px; margin-bottom: 14px; }
.ai-card h3 { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.ai-card p { font-size: 13px; color: var(--text-muted); line-height: 1.7; }

/* ===== 功能卡片 ===== */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: var(--transition);
}
.feature-card:hover { border-color: rgba(236,72,153,0.3); transform: translateY(-3px); }
.feature-icon { font-size: 32px; margin-bottom: 12px; }
.feature-card h3 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.feature-card p { font-size: 13px; color: var(--text-muted); line-height: 1.7; }

/* ===== 步骤卡片 ===== */
.join-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.step-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    transition: var(--transition);
}
.step-card:hover { border-color: rgba(236,72,153,0.3); transform: translateY(-3px); }
.step-num {
    width: 44px;
    height: 44px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 900;
    color: #fff;
    margin: 0 auto 14px;
}
.step-card h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.step-card p { font-size: 12px; color: var(--text-muted); line-height: 1.6; }

/* ===== 专家卡片 ===== */
.expert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.expert-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}
.expert-card:hover { border-color: rgba(236,72,153,0.3); transform: translateY(-4px); box-shadow: var(--shadow-card); }
.expert-photo { width: 100%; aspect-ratio: 1/1; object-fit: cover; }
.expert-info { padding: 18px; }
.expert-name { font-size: 16px; font-weight: 800; color: #fff; margin-bottom: 4px; }
.expert-role { font-size: 12px; color: var(--primary); font-weight: 600; margin-bottom: 10px; }
.expert-desc { font-size: 12px; color: var(--text-muted); line-height: 1.6; margin-bottom: 12px; }
.expert-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.expert-tag {
    padding: 3px 10px;
    background: rgba(236,72,153,0.1);
    border: 1px solid rgba(236,72,153,0.2);
    color: var(--primary);
    font-size: 11px;
    border-radius: 20px;
}
.expert-btns { display: flex; gap: 8px; }
.btn-sm {
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
}
.btn-sm-primary { background: var(--gradient-1); color: #fff; }
.btn-sm-outline { border: 1px solid var(--border); color: var(--text-muted); }
.btn-sm-outline:hover { border-color: rgba(236,72,153,0.3); color: var(--primary); opacity: 1; }

/* ===== 合作伙伴 ===== */
.partners-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}
.partner-item {
    padding: 14px 28px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    transition: var(--transition);
}
.partner-item:hover { border-color: rgba(236,72,153,0.3); color: var(--primary); }

/* ===== 联系我们 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info h3 { font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 24px; }
.contact-item { display: flex; gap: 14px; margin-bottom: 20px; }
.contact-icon { font-size: 20px; flex-shrink: 0; margin-top: 2px; }
.contact-label { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.contact-value { font-size: 14px; color: var(--text-main); font-weight: 500; }
.qrcode-row { display: flex; gap: 24px; flex-wrap: wrap; }
.qrcode-item { text-align: center; }
.qrcode-item img { border-radius: 10px; border: 2px solid var(--border); }
.qrcode-item p { font-size: 12px; color: var(--text-muted); margin-top: 8px; }

/* ===== 用户评价 ===== */
.reviews-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.review-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: var(--transition);
}
.review-card:hover { border-color: rgba(236,72,153,0.2); }
.review-header { display: flex; gap: 12px; align-items: center; margin-bottom: 10px; }
.review-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}
.review-name { font-size: 13px; font-weight: 600; color: var(--text-main); }
.review-date { font-size: 11px; color: var(--text-muted); }
.review-stars { color: var(--accent); font-size: 13px; margin-bottom: 8px; }
.review-text { font-size: 12px; color: var(--text-muted); line-height: 1.6; }

/* ===== FAQ ===== */
.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: rgba(236,72,153,0.3); }
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
    gap: 12px;
}
.faq-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(236,72,153,0.15);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 300;
    flex-shrink: 0;
    transition: transform 0.3s;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer-inner { padding: 0 20px 18px; font-size: 13px; color: var(--text-muted); line-height: 1.7; }

/* ===== 分页 ===== */
.pagination { display: flex; gap: 8px; justify-content: center; margin-top: 36px; }
.page-btn {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 14px;
    border-radius: 8px;
    transition: var(--transition);
    text-decoration: none;
}
.page-btn:hover { border-color: rgba(236,72,153,0.4); color: var(--primary); opacity: 1; }
.page-btn.active { background: var(--gradient-1); border-color: transparent; color: #fff; font-weight: 700; }

/* ===== 侧边栏布局 ===== */
.sidebar-layout { display: grid; grid-template-columns: 1fr 280px; gap: 28px; align-items: start; }
.sidebar-widget {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}
.widget-title { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.rank-list { display: flex; flex-direction: column; gap: 12px; }
.rank-item { display: flex; align-items: center; gap: 10px; }
.rank-num {
    width: 22px;
    height: 22px;
    border-radius: 4px;
    background: rgba(236,72,153,0.15);
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.rank-item:nth-child(1) .rank-num { background: var(--primary); color: #fff; }
.rank-item:nth-child(2) .rank-num { background: rgba(236,72,153,0.6); color: #fff; }
.rank-item:nth-child(3) .rank-num { background: rgba(236,72,153,0.3); color: #fff; }
.rank-title { font-size: 12px; color: var(--text-muted); flex: 1; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.rank-views { font-size: 11px; color: var(--text-muted); white-space: nowrap; }
.tag-cloud { display: flex; gap: 8px; flex-wrap: wrap; }

/* ===== 公告栏 ===== */
.notice-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(236,72,153,0.08);
    border: 1px solid rgba(236,72,153,0.2);
    border-radius: 8px;
    padding: 10px 16px;
    margin-bottom: 24px;
    font-size: 13px;
    color: var(--text-muted);
}
.notice-tag {
    background: var(--primary);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
    flex-shrink: 0;
}

/* ===== 页面Hero ===== */
.page-hero {
    background: linear-gradient(135deg, var(--dark-3) 0%, var(--dark-2) 100%);
    border-bottom: 1px solid var(--border);
    padding: 40px 20px;
    text-align: center;
}
.page-hero h1 { font-size: 28px; font-weight: 900; color: #fff; margin-bottom: 8px; }
.page-hero p { font-size: 14px; color: var(--text-muted); }

/* ===== 面包屑 ===== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 10px 20px;
    font-size: 13px;
    color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); opacity: 1; }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--text-main); }

/* ===== 底部 ===== */
footer {
    background: var(--dark-3);
    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: 40px; }
.footer-brand .brand-name {
    font-size: 24px;
    font-weight: 900;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 14px;
}
.footer-brand p { font-size: 13px; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; }
.footer-social { display: flex; gap: 10px; }
.social-icon {
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.07);
    border: 1px solid var(--border);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-muted);
    transition: var(--transition);
}
.social-icon:hover { background: rgba(236,72,153,0.15); border-color: rgba(236,72,153,0.3); color: var(--primary); opacity: 1; }
.footer-col h4 { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.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); opacity: 1; padding-left: 4px; }
.divider { border: none; border-top: 1px solid var(--border); margin: 24px 0; }
.footer-bottom {
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
}
.footer-bottom a { color: var(--text-muted); }
.footer-bottom a:hover { color: var(--primary); opacity: 1; }
.update-time {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
    font-size: 12px;
}

/* ===== 分享栏 ===== */
.share-bar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.share-label { font-size: 13px; color: var(--text-muted); }
.share-btn {
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    transition: var(--transition);
    border: 1px solid var(--border);
    color: var(--text-muted);
    text-decoration: none;
}
.share-wechat:hover { background: #07C160; border-color: #07C160; color: #fff; opacity: 1; }
.share-weibo:hover { background: #E6162D; border-color: #E6162D; color: #fff; opacity: 1; }
.share-douyin:hover { background: #000; border-color: #000; color: #fff; opacity: 1; }
.share-bilibili:hover { background: #00A1D6; border-color: #00A1D6; color: #fff; opacity: 1; }

/* ===== 模态框 ===== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    z-index: 9000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(8px);
}
.modal-overlay.open { display: flex; }
.modal-content {
    background: var(--dark-3);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 28px;
    width: 90%;
    max-width: 680px;
    position: relative;
}
.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 24px;
    color: var(--text-muted);
    background: none;
    border: none;
    cursor: pointer;
    line-height: 1;
}
.modal-video {
    background: var(--dark-1);
    border-radius: 12px;
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

/* ===== 滚动动画 ===== */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.5s ease, transform 0.5s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
    .video-grid-4 { grid-template-columns: repeat(3, 1fr); }
    .expert-grid { grid-template-columns: repeat(3, 1fr); }
    .reviews-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 992px) {
    .video-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .ai-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .join-steps { grid-template-columns: repeat(2, 1fr); }
    .expert-grid { grid-template-columns: repeat(2, 1fr); }
    .reviews-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .sidebar-layout { grid-template-columns: 1fr; }
    .navbar-nav { display: none; }
    .hamburger { display: flex; }
    .navbar-search { display: none; }
    .stat-item { padding: 14px 24px; }
}

@media (max-width: 768px) {
    .hero { padding: 40px 0 80px; min-height: 400px; }
    .hero h1 { font-size: 28px; }
    .video-grid-4, .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .ai-grid, .feature-grid { grid-template-columns: 1fr; }
    .join-steps { grid-template-columns: 1fr; }
    .expert-grid { grid-template-columns: repeat(2, 1fr); }
    .reviews-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .stat-item { padding: 12px 16px; }
    .stat-item .num { font-size: 18px; }
    .section { padding: 40px 0; }
    .btn-login { display: none; }
}

@media (max-width: 480px) {
    .video-grid-4, .video-grid-3 { grid-template-columns: 1fr; }
    .expert-grid { grid-template-columns: 1fr; }
    .hero-btns { flex-direction: column; }
    .hero-stats { flex-wrap: wrap; }
    .stat-item { flex: 1 1 50%; border-right: none; border-bottom: 1px solid var(--border); }
}