/* 探花视频官网 - 主样式文件 */
/* rwdfry.cn */

:root {
    --primary: #FF4D7D;
    --primary-dark: #E0355F;
    --primary-light: #FF8FAD;
    --secondary: #7B2FBE;
    --secondary-light: #9B59D0;
    --accent: #FF6B35;
    --bg-dark: #0D0D1A;
    --bg-card: #1A1A2E;
    --bg-card2: #16213E;
    --text-main: #F0F0F5;
    --text-muted: #A0A0B8;
    --text-light: #FFFFFF;
    --border: rgba(255,77,125,0.2);
    --gradient-main: linear-gradient(135deg, #FF4D7D 0%, #7B2FBE 100%);
    --gradient-card: linear-gradient(145deg, #1A1A2E 0%, #16213E 100%);
    --shadow: 0 8px 32px rgba(255,77,125,0.15);
    --shadow-hover: 0 16px 48px rgba(255,77,125,0.3);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    background: var(--bg-dark);
    color: var(--text-main);
    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; }

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

/* ===== 导航栏 ===== */
.navbar {
    background: rgba(13,13,26,0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0 20px;
}

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

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

.nav-logo img.logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    border-radius: 8px;
}

.nav-logo .brand-name {
    font-size: 22px;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}

.nav-menu li a {
    display: block;
    padding: 8px 14px;
    font-size: 14px;
    color: var(--text-muted);
    border-radius: 8px;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    color: var(--primary);
    background: rgba(255,77,125,0.1);
}

/* 搜索框 */
.nav-search {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.07);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 6px 16px;
    gap: 8px;
    min-width: 180px;
    transition: var(--transition);
}

.nav-search:focus-within {
    border-color: var(--primary);
    background: rgba(255,77,125,0.08);
}

.nav-search input {
    background: none;
    border: none;
    outline: none;
    color: var(--text-main);
    font-size: 13px;
    width: 100%;
}

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

.nav-search button {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    font-size: 15px;
    transition: var(--transition);
}

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

.nav-btn {
    background: var(--gradient-main);
    color: #fff !important;
    padding: 8px 20px !important;
    border-radius: 24px !important;
    font-weight: 600;
    font-size: 13px !important;
    white-space: nowrap;
    box-shadow: 0 4px 15px rgba(255,77,125,0.3);
}

.nav-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(255,77,125,0.45) !important;
    background: rgba(255,77,125,0.1) !important;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

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

/* ===== 面包屑 ===== */
.breadcrumb {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 10px 20px;
    font-size: 13px;
    color: var(--text-muted);
}

.breadcrumb-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { opacity: 0.4; }
.breadcrumb .current { color: var(--primary); }

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

.section {
    padding: 70px 20px;
}

.section-inner {
    max-width: 1280px;
    margin: 0 auto;
}

/* 章节标题 */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-tag {
    display: inline-block;
    background: rgba(255,77,125,0.15);
    color: var(--primary);
    border: 1px solid rgba(255,77,125,0.3);
    border-radius: 20px;
    padding: 4px 16px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(24px, 4vw, 38px);
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 14px;
    color: var(--text-light);
}

.section-title span {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-desc {
    font-size: 15px;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ===== Hero 区域 ===== */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--bg-dark);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: url('../images/banner-hero.jpg') center/cover no-repeat;
    filter: brightness(0.3);
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(13,13,26,0.9) 0%, rgba(123,47,190,0.3) 50%, rgba(13,13,26,0.8) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1280px;
    margin: 0 auto;
    padding: 80px 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text .hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,77,125,0.15);
    border: 1px solid rgba(255,77,125,0.3);
    border-radius: 20px;
    padding: 6px 16px;
    font-size: 12px;
    color: var(--primary-light);
    margin-bottom: 20px;
    animation: fadeInUp 0.6s ease;
}

.hero-tag .dot {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: clamp(32px, 5vw, 58px);
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--text-light);
    animation: fadeInUp 0.7s ease;
}

.hero-title .highlight {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 30px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease;
}

.hero-stats {
    display: flex;
    gap: 30px;
    margin-bottom: 35px;
    animation: fadeInUp 0.9s ease;
}

.hero-stat .num {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.hero-stat .label {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

.hero-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--gradient-main);
    color: #fff;
    padding: 14px 28px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 15px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 6px 20px rgba(255,77,125,0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255,77,125,0.5);
    color: #fff;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--text-light);
    padding: 13px 28px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 15px;
    border: 1px solid rgba(255,255,255,0.2);
    cursor: pointer;
    transition: var(--transition);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(255,77,125,0.08);
}

/* Hero 视频卡片展示 */
.hero-visual {
    position: relative;
    animation: fadeInRight 0.8s ease;
}

.hero-video-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

/* ===== 视频卡片 ===== */
.video-card {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-card);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

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

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

.video-card:hover .thumb img {
    transform: scale(1.05);
}

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

.video-card:hover .play-overlay {
    background: rgba(0,0,0,0.45);
}

.video-card .play-btn {
    width: 52px;
    height: 52px;
    background: var(--gradient-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: scale(0.7);
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(255,77,125,0.5);
}

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

.play-btn svg {
    width: 20px;
    height: 20px;
    fill: #fff;
    margin-left: 3px;
}

.video-card .duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    font-size: 11px;
    padding: 2px 7px;
    border-radius: 4px;
}

.video-card .card-info {
    padding: 12px;
}

.video-card .card-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}

.video-card .card-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 11px;
    color: var(--text-muted);
}

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

.video-card .tag-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    background: var(--gradient-main);
    color: #fff;
    font-size: 10px;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}

/* ===== 视频网格 ===== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
}

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

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

/* ===== 特性卡片 ===== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.feature-card {
    background: var(--gradient-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 22px;
    text-align: center;
    transition: var(--transition);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    background: rgba(255,77,125,0.15);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 24px;
}

.feature-card h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 8px;
}

.feature-card p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.7;
}

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

.expert-card {
    background: var(--gradient-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

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

.expert-card .expert-photo {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
}

.expert-card .expert-info {
    padding: 18px;
}

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

.expert-card .expert-role {
    font-size: 12px;
    color: var(--primary);
    margin-bottom: 10px;
    font-weight: 600;
}

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

.expert-card .expert-awards {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 14px;
}

.award-tag {
    background: rgba(255,77,125,0.1);
    border: 1px solid rgba(255,77,125,0.2);
    color: var(--primary-light);
    font-size: 10px;
    padding: 3px 8px;
    border-radius: 4px;
}

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

.btn-sm {
    flex: 1;
    padding: 7px 12px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-sm-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
}

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

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

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

.review-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

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

.reviewer-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-main);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

.reviewer-info .name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-light);
}

.reviewer-info .date {
    font-size: 11px;
    color: var(--text-muted);
}

.review-stars {
    color: #FFD700;
    font-size: 13px;
    margin-bottom: 10px;
}

.review-text {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.8;
}

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

.faq-item {
    background: var(--gradient-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);
}

.faq-question {
    padding: 18px 22px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    gap: 12px;
}

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

.faq-arrow {
    width: 24px;
    height: 24px;
    background: rgba(255,77,125,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
    font-size: 12px;
    color: var(--primary);
}

.faq-item.open .faq-arrow { transform: rotate(180deg); }

.faq-answer {
    padding: 0 22px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.open .faq-answer {
    padding: 0 22px 18px;
    max-height: 300px;
}

.faq-answer p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
}

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

.partner-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 24px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    transition: var(--transition);
    text-align: center;
    min-width: 120px;
}

.partner-item:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(255,77,125,0.05);
}

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

.contact-info-block {
    background: var(--gradient-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.contact-info-block h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 20px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.contact-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.contact-icon {
    width: 36px;
    height: 36px;
    background: rgba(255,77,125,0.15);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}

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

.contact-item .value {
    font-size: 14px;
    color: var(--text-main);
    font-weight: 500;
}

/* QR码区域 */
.qr-grid {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.qr-item {
    text-align: center;
    flex: 1;
    min-width: 120px;
}

.qr-item img {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: var(--radius);
    border: 2px solid var(--border);
    margin: 0 auto 8px;
}

.qr-item p {
    font-size: 12px;
    color: var(--text-muted);
}

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

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

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border);
    color: var(--text-muted);
    background: var(--bg-card);
}

.share-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(255,77,125,0.08);
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 50px 20px 20px;
}

.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
}

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

.footer-brand .brand-name {
    font-size: 24px;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.footer-brand p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-logo-img {
    width: 50px;
    height: 50px;
    object-fit: contain;
    margin-bottom: 12px;
    border-radius: 10px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 16px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 8px;
}

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

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

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

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

/* ===== 内页 Banner ===== */
.page-banner {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 50px 20px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(255,77,125,0.1) 0%, transparent 70%);
}

.page-banner h1 {
    font-size: clamp(28px, 5vw, 44px);
    font-weight: 900;
    color: var(--text-light);
    position: relative;
    margin-bottom: 12px;
}

.page-banner p {
    font-size: 15px;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    line-height: 1.8;
}

/* ===== 内页内容 ===== */
.page-content {
    padding: 60px 20px;
}

.page-content-inner {
    max-width: 1280px;
    margin: 0 auto;
}

/* ===== 统计数字 ===== */
.stats-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin: 40px 0;
}

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

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

.stat-card .num {
    font-size: 36px;
    font-weight: 900;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 6px;
}

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

/* ===== 加入指南 ===== */
.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

.guide-step {
    background: var(--gradient-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px 20px;
    text-align: center;
    position: relative;
    transition: var(--transition);
}

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

.step-num {
    width: 40px;
    height: 40px;
    background: var(--gradient-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 800;
    color: #fff;
    margin: 0 auto 14px;
}

.guide-step h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-light);
    margin-bottom: 8px;
}

.guide-step p {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* ===== 标签 ===== */
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0;
}

.tag {
    background: rgba(255,77,125,0.1);
    border: 1px solid rgba(255,77,125,0.2);
    color: var(--primary-light);
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
}

.tag:hover, .tag.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

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

/* ===== 动画 ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.3); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .hero-content { grid-template-columns: 1fr; }
    .hero-visual { display: none; }
    .footer-top { grid-template-columns: 1fr 1fr; }
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .video-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-menu { display: none; position: absolute; top: 70px; left: 0; right: 0; background: var(--bg-dark); padding: 16px; flex-direction: column; border-bottom: 1px solid var(--border); }
    .nav-menu.open { display: flex; }
    .hamburger { display: flex; }
    .nav-search { display: none; }
    .section { padding: 50px 16px; }
    .footer-top { grid-template-columns: 1fr; }
    .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .video-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .hero-stats { gap: 20px; }
    .hero-stat .num { font-size: 22px; }
    .stats-row { grid-template-columns: repeat(2, 1fr); }
    .expert-grid { grid-template-columns: repeat(2, 1fr); }
    .guide-steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .video-grid, .video-grid-3, .video-grid-4 { grid-template-columns: 1fr; }
    .expert-grid { grid-template-columns: 1fr; }
    .guide-steps { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .hero-actions { flex-direction: column; }
    .btn-primary, .btn-outline { width: 100%; justify-content: center; }
}

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

/* ===== 选中颜色 ===== */
::selection { background: rgba(255,77,125,0.3); color: var(--text-light); }

/* ===== 图片懒加载占位 ===== */
img[data-src] { opacity: 0; transition: opacity 0.3s ease; }
img.loaded { opacity: 1; }

/* ===== 内页文章内容 ===== */
.article-content {
    font-size: 15px;
    line-height: 1.9;
    color: var(--text-muted);
}

.article-content h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-light);
    margin: 30px 0 14px;
}

.article-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-main);
    margin: 24px 0 10px;
}

.article-content p { margin-bottom: 16px; }

.article-content ul {
    padding-left: 20px;
    margin-bottom: 16px;
}

.article-content ul li { margin-bottom: 6px; }

/* ===== 高亮文字 ===== */
.text-primary { color: var(--primary); }
.text-gradient {
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===== 分隔线 ===== */
.divider {
    height: 1px;
    background: var(--border);
    margin: 40px 0;
}

/* ===== 视频播放模态框 ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 20px;
    max-width: 800px;
    width: 100%;
    position: relative;
}

.modal-close {
    position: absolute;
    top: -16px;
    right: -16px;
    width: 36px;
    height: 36px;
    background: var(--primary);
    border-radius: 50%;
    border: none;
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-video {
    width: 100%;
    aspect-ratio: 16/9;
    background: #000;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
}

/* ===== 直播标签 ===== */
.live-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: #FF0000;
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
}

.live-dot {
    width: 5px;
    height: 5px;
    background: #fff;
    border-radius: 50%;
    animation: pulse 1.5s infinite;
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--gradient-main);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 500;
    box-shadow: 0 4px 16px rgba(255,77,125,0.4);
    border: none;
    color: #fff;
    font-size: 18px;
}
.back-to-top.visible {
    opacity: 1;
    transform: translateY(0);
}
.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(255,77,125,0.5);
}

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

/* ===== 选中颜色 ===== */
::selection { background: rgba(255,77,125,0.3); color: var(--text-light); }