/* ===================================================
   每日大赛影视传媒社区 - 主样式文件
   品牌：每日大赛 | 域名：hlmthd.cn
   设计理念：深邃影视感 + 温暖杏色调
   =================================================== */

/* ===== CSS变量 ===== */
:root {
    --primary: #e8612c;
    --primary-dark: #c44e1e;
    --primary-light: #f5a07a;
    --secondary: #1a1a2e;
    --accent: #f7c59f;
    --dark: #0d0d1a;
    --text-main: #1a1a2e;
    --text-light: #4a4a6a;
    --text-muted: #8a8aaa;
    --bg-light: #fdf6f0;
    --bg-card: #ffffff;
    --border: #ede8e3;
    --gradient-main: linear-gradient(135deg, #e8612c 0%, #f5a07a 100%);
    --gradient-dark: linear-gradient(135deg, #1a1a2e 0%, #2d2d4e 100%);
    --shadow-sm: 0 2px 8px rgba(232,97,44,0.08);
    --shadow-md: 0 8px 32px rgba(232,97,44,0.12);
    --shadow-lg: 0 20px 60px rgba(232,97,44,0.16);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 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: -apple-system, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', sans-serif;
    color: var(--text-main);
    background: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; }

/* ===== 容器 ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 顶部公告栏 ===== */
.top-bar {
    background: var(--gradient-main);
    color: #fff;
    text-align: center;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.3px;
}
.top-bar a { color: #fff; text-decoration: underline; margin-left: 4px; }
.top-bar a:hover { opacity: 0.8; }

/* ===== 导航栏 ===== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 16px rgba(0,0,0,0.06);
}
.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 24px;
    height: 64px;
}
.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.navbar-brand img {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    object-fit: contain;
}
.brand-text {
    font-size: 22px;
    font-weight: 900;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
}
.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    flex-wrap: wrap;
}
.nav-menu a {
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    white-space: nowrap;
    transition: var(--transition);
}
.nav-menu a:hover, .nav-menu a.active {
    background: var(--bg-light);
    color: var(--primary);
}
.nav-menu a.hot-tag {
    background: linear-gradient(135deg, #ff6b6b, #feca57);
    color: #fff !important;
    font-weight: 700;
}
.nav-menu a.hot-tag:hover { opacity: 0.9; }
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    margin-left: auto;
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== 搜索栏 ===== */
.search-bar {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 12px 0 10px;
}
.search-bar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    gap: 10px;
    align-items: center;
}
.search-input-wrap {
    position: relative;
    flex: 1;
    max-width: 600px;
}
.search-input {
    width: 100%;
    padding: 10px 40px 10px 16px;
    border: 1.5px solid var(--border);
    border-radius: 24px;
    font-size: 14px;
    outline: none;
    transition: var(--transition);
    background: var(--bg-light);
    color: var(--text-main);
}
.search-input:focus { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(232,97,44,0.1); }
.search-icon { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); font-size: 16px; pointer-events: none; }
.search-btn {
    padding: 10px 24px;
    background: var(--gradient-main);
    color: #fff;
    border: none;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}
.search-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.search-tags {
    max-width: 1200px;
    margin: 8px auto 0;
    padding: 0 20px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.search-tags span {
    padding: 3px 12px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 16px;
    font-size: 12px;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
}
.search-tags span:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ===== 面包屑 ===== */
.breadcrumb {
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px 20px;
    font-size: 13px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
    background: #fff;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--text-main); font-weight: 500; }

/* ===== 英雄区 ===== */
.hero {
    position: relative;
    height: 580px;
    overflow: hidden;
    background: var(--dark);
}
.hero-slider { position: absolute; inset: 0; }
.hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.8s ease;
}
.hero-slide.active { opacity: 1; }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(13,13,26,0.85) 0%, rgba(13,13,26,0.4) 60%, rgba(13,13,26,0.2) 100%);
    z-index: 1;
}
.hero-content {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 60px;
    max-width: 700px;
}
.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(232,97,44,0.2);
    border: 1px solid rgba(232,97,44,0.4);
    color: var(--accent);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
    width: fit-content;
}
.hero-content h1 {
    font-size: 52px;
    font-weight: 900;
    color: #fff;
    line-height: 1.15;
    margin-bottom: 16px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.hero-content h1 .highlight {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 16px;
    color: rgba(255,255,255,0.8);
    line-height: 1.7;
    margin-bottom: 28px;
    max-width: 520px;
}
.hero-actions { display: flex; gap: 12px; margin-bottom: 36px; flex-wrap: wrap; }
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--gradient-main);
    color: #fff;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(232,97,44,0.4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(232,97,44,0.5); color: #fff; }
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.5);
    border-radius: 30px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
}
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; color: #fff; }
.hero-stats { display: flex; gap: 32px; flex-wrap: wrap; }
.hero-stat .num { font-size: 28px; font-weight: 900; color: #fff; }
.hero-stat .label { font-size: 12px; color: rgba(255,255,255,0.6); margin-top: 2px; }
.hero-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    gap: 8px;
}
.hero-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: var(--transition);
}
.hero-dots span.active { background: var(--primary); width: 24px; border-radius: 4px; }

/* ===== 统计栏 ===== */
.stats-bar {
    background: var(--gradient-dark);
    padding: 24px 0;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}
.stat-item .num { font-size: 28px; font-weight: 900; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-item .label { font-size: 13px; color: rgba(255,255,255,0.6); margin-top: 4px; }

/* ===== 通用Section ===== */
.section { padding: 64px 0; }
.section-alt { background: var(--bg-light); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(232,97,44,0.1);
    color: var(--primary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 12px;
}
.section-title { font-size: 32px; font-weight: 900; color: var(--dark); margin-bottom: 12px; }
.section-title .brand { color: var(--primary); }
.section-desc { font-size: 15px; color: var(--text-light); max-width: 600px; margin: 0 auto; line-height: 1.7; }
.section-more { text-align: center; margin-top: 40px; }
.btn-more {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 32px;
    border: 2px solid var(--primary);
    color: var(--primary);
    border-radius: 30px;
    font-size: 15px;
    font-weight: 700;
    transition: var(--transition);
}
.btn-more:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* ===== 视频卡片网格 ===== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.video-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid var(--border);
}
.video-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.video-card.animate-in { opacity: 1 !important; animation: fadeInUp 0.5s ease forwards; }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.video-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--dark);
}
.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }

/* 播放按钮 - 鼠标悬停显示 */
.video-play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.3);
    opacity: 0;
    transition: var(--transition);
}
.video-card:hover .video-play-btn { opacity: 1; }
.play-icon {
    width: 52px;
    height: 52px;
    background: rgba(255,255,255,0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    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 var(--primary);
    margin-left: 4px;
}

.video-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: var(--gradient-main);
    color: #fff;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
}
.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
}
.video-info { padding: 12px; }
.video-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.video-meta { display: flex; justify-content: space-between; align-items: center; }
.video-stats { display: flex; gap: 10px; font-size: 12px; color: var(--text-muted); }
.video-author { font-size: 12px; color: var(--primary); font-weight: 500; }

/* ===== 功能卡片 ===== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.feature-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    border: 1px solid var(--border);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.feature-card.animate-in { opacity: 1 !important; animation: fadeInUp 0.5s ease forwards; }
.feature-icon { font-size: 36px; margin-bottom: 16px; }
.feature-title { font-size: 17px; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.feature-desc { font-size: 14px; color: var(--text-light); line-height: 1.7; margin-bottom: 14px; }
.feature-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.feature-tag {
    padding: 3px 10px;
    background: rgba(232,97,44,0.08);
    color: var(--primary);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

/* ===== 直播卡片 ===== */
.live-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.live-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.live-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.live-thumb {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}
.live-thumb img { width: 100%; height: 100%; object-fit: cover; }
.live-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: #ff4444;
    color: #fff;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
    animation: pulse 1.5s infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.7; } }
.live-viewers {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 12px;
}
.live-info { padding: 10px 12px; }
.live-title { font-size: 14px; font-weight: 600; color: var(--text-main); margin-bottom: 4px; }
.live-host { font-size: 12px; color: var(--text-muted); }

/* ===== 专家卡片 ===== */
.expert-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}
.expert-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    gap: 24px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.expert-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.expert-card.animate-in { opacity: 1 !important; animation: fadeInUp 0.5s ease forwards; }
.expert-avatar { position: relative; flex-shrink: 0; }
.expert-avatar img { width: 100px; height: 100px; border-radius: 50%; object-fit: cover; border: 3px solid var(--primary-light); }
.expert-badge {
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-main);
    color: #fff;
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 700;
    white-space: nowrap;
}
.expert-name { font-size: 20px; font-weight: 800; color: var(--dark); margin-bottom: 4px; }
.expert-title { font-size: 13px; color: var(--primary); font-weight: 600; margin-bottom: 10px; }
.expert-desc { font-size: 14px; color: var(--text-light); line-height: 1.7; margin-bottom: 12px; }
.expert-awards { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.award-tag {
    padding: 3px 10px;
    background: rgba(232,97,44,0.08);
    color: var(--primary);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}
.expert-actions { display: flex; gap: 10px; }
.btn-sm {
    padding: 7px 18px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}
.btn-sm-primary { background: var(--gradient-main); color: #fff; }
.btn-sm-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); color: #fff; }
.btn-sm-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary) !important; }
.btn-sm-outline:hover { background: var(--primary); color: #fff; }

/* ===== 合作品牌 ===== */
.partner-wall {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
}
.partner-logo {
    padding: 16px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 700;
    color: var(--text-muted);
    transition: var(--transition);
    cursor: default;
}
.partner-logo:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-sm); }

/* ===== 步骤卡片 ===== */
.how-to-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
}
.how-to-steps::before {
    content: '';
    position: absolute;
    top: 32px;
    left: 12%;
    right: 12%;
    height: 2px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    z-index: 0;
}
.step-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
    border: 1px solid var(--border);
    position: relative;
    z-index: 1;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.step-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.step-card.animate-in { opacity: 1 !important; animation: fadeInUp 0.5s ease forwards; }
.step-num {
    width: 52px;
    height: 52px;
    background: var(--gradient-main);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 900;
    margin: 0 auto 16px;
    box-shadow: 0 4px 16px rgba(232,97,44,0.3);
}
.step-title { font-size: 16px; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.step-desc { font-size: 13px; color: var(--text-light); line-height: 1.7; }

/* ===== 联系区域 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}
.contact-info h3 { font-size: 20px; font-weight: 700; color: var(--dark); margin-bottom: 20px; }
.contact-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}
.contact-icon { font-size: 20px; flex-shrink: 0; margin-top: 2px; }
.contact-label { font-size: 12px; color: var(--text-muted); margin-bottom: 2px; }
.contact-value { font-size: 14px; font-weight: 600; color: var(--text-main); }
.qrcode-section h3 { font-size: 20px; font-weight: 700; color: var(--dark); margin-bottom: 20px; }
.qrcode-grid { display: flex; gap: 24px; }
.qrcode-item { text-align: center; }
.qrcode-item img { width: 130px; height: 130px; border-radius: 12px; margin: 0 auto 8px; border: 2px solid var(--border); }
.qrcode-label { font-size: 13px; color: var(--text-muted); }

/* ===== 用户评价 ===== */
.review-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.review-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.review-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.review-card.animate-in { opacity: 1 !important; animation: fadeInUp 0.5s ease forwards; }
.review-header { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; }
.review-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-main);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    flex-shrink: 0;
}
.review-name { font-size: 15px; font-weight: 700; color: var(--dark); }
.review-date { font-size: 12px; color: var(--text-muted); }
.review-stars { color: #ffc107; font-size: 14px; margin-bottom: 10px; letter-spacing: 2px; }
.review-text { font-size: 14px; color: var(--text-light); line-height: 1.7; margin-bottom: 12px; }
.review-tag {
    display: inline-block;
    padding: 3px 12px;
    background: rgba(232,97,44,0.08);
    color: var(--primary);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}
.faq-item.open { border-color: var(--primary); box-shadow: var(--shadow-sm); }
.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 20px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    transition: var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-item.open .faq-question { color: var(--primary); }
.faq-icon { font-size: 20px; font-weight: 300; color: var(--primary); transition: var(--transition); flex-shrink: 0; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; }
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer-inner { padding: 0 20px 18px; font-size: 14px; color: var(--text-light); line-height: 1.8; }

/* ===== 标签云 ===== */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.tag-item {
    padding: 8px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 14px;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
}
.tag-item:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }
.tag-item.hot { background: rgba(232,97,44,0.1); color: var(--primary); border-color: var(--primary-light); font-weight: 600; }

/* ===== 分享栏 ===== */
.share-bar { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.share-label { font-size: 14px; font-weight: 600; color: var(--text-main); }
.share-btns { display: flex; gap: 10px; flex-wrap: wrap; }
.share-btn {
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}
.share-wechat { background: #07c160; color: #fff; }
.share-weibo { background: #e6162d; color: #fff; }
.share-douyin { background: #000; color: #fff; }
.share-bilibili { background: #00a1d6; color: #fff; }
.share-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }

/* ===== 底部 ===== */
.footer {
    background: var(--gradient-dark);
    color: rgba(255,255,255,0.8);
    padding: 60px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand .logo-wrap { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-brand .logo-wrap img { width: 44px; height: 44px; border-radius: 10px; }
.footer-brand .brand-name { font-size: 22px; font-weight: 900; background: var(--gradient-main); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.footer-brand p { font-size: 13px; line-height: 1.8; margin-bottom: 16px; opacity: 0.7; }
.footer-social { display: flex; gap: 10px; }
.social-link {
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: rgba(255,255,255,0.7);
    transition: var(--transition);
}
.social-link:hover { background: var(--primary); color: #fff; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-links a { font-size: 13px; color: rgba(255,255,255,0.6); transition: var(--transition); }
.footer-links a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-top: 1px solid rgba(255,255,255,0.08);
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    flex-wrap: wrap;
    gap: 12px;
}
.footer-icp { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-icp a { color: rgba(255,255,255,0.5); font-size: 13px; }
.footer-icp a:hover { color: var(--primary-light); }

/* ===== 返回顶部 ===== */
.back-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    background: var(--gradient-main);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(232,97,44,0.4);
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}
.back-top.visible { opacity: 1; transform: translateY(0); }
.back-top:hover { transform: translateY(-4px); box-shadow: 0 8px 32px rgba(232,97,44,0.5); }

/* ===== 内页通用 ===== */
.page-hero {
    background: var(--gradient-dark);
    padding: 60px 0;
    text-align: center;
}
.page-hero-content h1 { font-size: 36px; font-weight: 900; color: #fff; margin-bottom: 12px; }
.page-hero-content p { font-size: 16px; color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto; }
.content-layout {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 32px;
    align-items: start;
}
aside { position: sticky; top: 80px; }
.sidebar-widget {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 20px;
    border: 1px solid var(--border);
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}
.sidebar-widget h3 { font-size: 15px; font-weight: 700; color: var(--dark); margin-bottom: 14px; padding-bottom: 10px; border-bottom: 2px solid var(--primary); }

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .video-grid { grid-template-columns: repeat(3, 1fr); }
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .live-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .how-to-steps::before { display: none; }
    .how-to-steps { grid-template-columns: repeat(2, 1fr); }
    .expert-grid { grid-template-columns: 1fr; }
    .review-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 8px 32px rgba(0,0,0,0.1);
        gap: 4px;
    }
    .nav-menu.open { display: flex; }
    .nav-menu a { padding: 10px 16px; border-radius: 8px; }
    .hero { height: 480px; }
    .hero-content { padding: 0 24px; }
    .hero-content h1 { font-size: 36px; }
    .hero-stats { gap: 20px; }
    .hero-stat .num { font-size: 22px; }
    .video-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-grid { grid-template-columns: 1fr; }
    .live-grid { grid-template-columns: repeat(2, 1fr); }
    .how-to-steps { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .content-layout { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .section-title { font-size: 24px; }
    .section { padding: 48px 0; }
    .expert-card { flex-direction: column; }
    .review-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .video-grid { grid-template-columns: 1fr; }
    .live-grid { grid-template-columns: 1fr; }
    .hero { height: 420px; }
    .hero-content h1 { font-size: 28px; }
    .hero-actions { flex-direction: column; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .search-bar-inner { flex-direction: column; }
    .search-input-wrap { max-width: 100%; }
    .page-hero-content h1 { font-size: 26px; }
    .qrcode-grid { flex-direction: column; }
}

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }