/* ===== 足球直播 - 全站样式表 ===== */
/* 品牌色彩体系 */
:root {
    --primary-color: #1a237e;
    --primary-light: #283593;
    --secondary-color: #f9a825;
    --secondary-light: #fdd835;
    --accent-color: #2e7d32;
    --accent-light: #43a047;
    --dark-bg: #0d1117;
    --card-bg: #161b22;
    --card-hover: #1c2129;
    --text-primary: #ffffff;
    --text-secondary: #b0bec5;
    --text-muted: #78909c;
    --border-color: #30363d;
    --gradient-primary: linear-gradient(135deg, #1a237e 0%, #283593 50%, #1565c0 100%);
    --gradient-gold: linear-gradient(135deg, #f9a825 0%, #ff8f00 100%);
    --gradient-dark: linear-gradient(180deg, #0d1117 0%, #161b22 100%);
    --shadow-card: 0 4px 24px rgba(0,0,0,0.3);
    --shadow-hover: 0 8px 40px rgba(26,35,126,0.4);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

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

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

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

ul, ol {
    list-style: none;
}

/* ===== 头部导航 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-wrap img {
    height: 45px;
    width: auto;
}

.logo-wrap .brand-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--secondary-color);
    letter-spacing: 1px;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}

.main-nav a {
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--secondary-color);
    background: rgba(249, 168, 37, 0.1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

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

/* ===== 搜索框 ===== */
.search-bar {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 0;
    margin-top: 70px;
}

.search-bar .search-inner {
    max-width: 700px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    gap: 10px;
}

.search-bar input {
    flex: 1;
    padding: 10px 18px;
    border: 1px solid var(--border-color);
    border-radius: 25px;
    background: var(--dark-bg);
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition);
}

.search-bar input:focus {
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(249, 168, 37, 0.15);
}

.search-bar button {
    padding: 10px 24px;
    background: var(--gradient-gold);
    color: #000;
    border: none;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.search-bar button:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(249, 168, 37, 0.4);
}

/* ===== Banner轮播 ===== */
.hero-banner {
    position: relative;
    overflow: hidden;
    height: 500px;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease;
}

.banner-slide.active {
    opacity: 1;
}

.banner-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 60px 40px 40px;
    background: linear-gradient(transparent, rgba(13, 17, 23, 0.95));
}

.banner-overlay h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 12px;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.5);
}

.banner-overlay p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
}

/* ===== 通用容器 ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 60px 0;
}

.section-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--gradient-gold);
    border-radius: 2px;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 36px;
}

/* ===== 视频卡片 ===== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

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

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

.video-thumb {
    position: relative;
    padding-top: 56.25%;
    overflow: hidden;
}

.video-thumb img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 60px;
    height: 60px;
    background: rgba(249, 168, 37, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    box-shadow: 0 4px 20px rgba(249, 168, 37, 0.5);
}

.video-play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 18px solid #000;
    border-top: 11px solid transparent;
    border-bottom: 11px solid transparent;
    margin-left: 4px;
}

.video-card:hover .video-play-btn {
    transform: translate(-50%, -50%) scale(1);
}

.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.8);
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
}

.video-info {
    padding: 16px;
}

.video-info h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

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

.video-tag {
    display: inline-block;
    padding: 2px 8px;
    background: rgba(249, 168, 37, 0.15);
    color: var(--secondary-color);
    border-radius: 4px;
    font-size: 0.75rem;
    margin-top: 8px;
}

/* ===== 球队赛程 ===== */
.match-schedule {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
}

.match-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 20px;
    transition: var(--transition);
}

.match-card:hover {
    border-color: var(--accent-color);
    box-shadow: 0 4px 20px rgba(46, 125, 50, 0.2);
}

.match-time {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.match-teams {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.match-team {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    flex: 1;
}

.match-team .flag {
    width: 48px;
    height: 32px;
    border-radius: 4px;
    object-fit: cover;
    border: 1px solid var(--border-color);
}

.match-team .team-name {
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
}

.match-score {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--secondary-color);
    padding: 0 16px;
}

.match-status {
    text-align: center;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

.match-status .live-badge {
    display: inline-block;
    padding: 3px 10px;
    background: #c62828;
    color: #fff;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    animation: pulse 2s infinite;
}

.match-status .upcoming-badge {
    display: inline-block;
    padding: 3px 10px;
    background: var(--primary-light);
    color: #fff;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* ===== FAQ ===== */
.faq-list {
    max-width: 900px;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--secondary-color);
}

.faq-question {
    padding: 18px 24px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: rgba(249, 168, 37, 0.05);
}

.faq-question::after {
    content: '+';
    font-size: 1.4rem;
    color: var(--secondary-color);
    transition: var(--transition);
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    color: var(--text-secondary);
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    padding: 0 24px 18px;
    max-height: 500px;
}

/* ===== 用户评论 ===== */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

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

.review-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card);
}

.review-stars {
    color: var(--secondary-color);
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.review-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.review-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.review-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.review-date {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ===== 专家展示 ===== */
.experts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.expert-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    transition: var(--transition);
}

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

.expert-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 16px;
    background: var(--gradient-gold);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    color: #000;
}

.expert-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.expert-title {
    color: var(--secondary-color);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.expert-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.expert-btn {
    display: inline-block;
    padding: 8px 20px;
    background: var(--gradient-gold);
    color: #000;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
}

.expert-btn:hover {
    transform: scale(1.05);
    color: #000;
}

/* ===== 合作品牌 ===== */
.brand-wall {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    align-items: center;
}

.brand-item {
    width: 140px;
    height: 70px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    transition: var(--transition);
    font-weight: 700;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.brand-item:hover {
    border-color: var(--secondary-color);
    background: rgba(249, 168, 37, 0.05);
    color: var(--secondary-color);
}

/* ===== 社区功能 ===== */
.community-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

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

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

.community-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.community-card h4 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.community-card p {
    color: var(--text-muted);
    font-size: 0.85rem;
    line-height: 1.6;
}

/* ===== 联系我们 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.contact-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
}

.contact-card h4 {
    font-size: 1rem;
    margin-bottom: 12px;
    color: var(--secondary-color);
}

.contact-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
}

/* ===== 页脚 ===== */
.site-footer {
    background: #080b10;
    border-top: 1px solid var(--border-color);
    padding: 50px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--secondary-color);
}

.footer-col p,
.footer-col a {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 2;
    display: block;
}

.footer-col a:hover {
    color: var(--secondary-color);
}

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

.footer-qr img {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-sm);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-bottom p {
    margin-bottom: 6px;
}

/* ===== 分享按钮 ===== */
.share-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

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

/* ===== 面包屑 ===== */
.breadcrumb {
    padding: 16px 0;
    color: var(--text-muted);
    font-size: 0.85rem;
}

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

.breadcrumb a:hover {
    color: var(--secondary-color);
}

.breadcrumb span {
    margin: 0 8px;
}

/* ===== 内页布局 ===== */
.page-hero {
    height: 300px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.page-hero img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
}

.page-hero-content {
    position: relative;
    z-index: 2;
}

.page-hero h1 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.page-hero p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 600px;
}

.page-content {
    padding: 50px 0;
}

.content-text {
    max-width: 900px;
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.9;
    margin-bottom: 40px;
}

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

/* ===== How-To指南 ===== */
.howto-steps {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
}

.howto-step {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    position: relative;
}

.howto-step .step-num {
    position: absolute;
    top: -12px;
    left: 20px;
    width: 32px;
    height: 32px;
    background: var(--gradient-gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #000;
    font-size: 0.9rem;
}

.howto-step h4 {
    margin-top: 8px;
    margin-bottom: 8px;
    font-size: 1rem;
}

.howto-step p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .header-inner {
        height: 60px;
    }
    .logo-wrap img {
        height: 36px;
    }
    .hero-banner {
        height: 380px;
    }
    .banner-overlay h1 {
        font-size: 1.8rem;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    .main-nav {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: rgba(13, 17, 23, 0.98);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition);
        border-bottom: 1px solid var(--border-color);
    }
    .main-nav.active {
        transform: translateY(0);
        opacity: 1;
    }
    .main-nav a {
        padding: 12px 16px;
        font-size: 1rem;
    }
    .hero-banner {
        height: 280px;
    }
    .banner-overlay h1 {
        font-size: 1.4rem;
    }
    .banner-overlay p {
        font-size: 0.9rem;
    }
    .section {
        padding: 40px 0;
    }
    .section-title {
        font-size: 1.4rem;
    }
    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    }
    .match-schedule {
        grid-template-columns: 1fr;
    }
    .page-hero {
        height: 220px;
    }
    .page-hero h1 {
        font-size: 1.6rem;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .hero-banner {
        height: 220px;
    }
    .video-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .search-bar .search-inner {
        flex-direction: column;
    }
}

/* ===== 懒加载 ===== */
img[data-src] {
    opacity: 0;
    transition: opacity 0.5s ease;
}

img[data-src].loaded {
    opacity: 1;
}

/* ===== 动画 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
    animation: fadeInFallback 0.8s ease forwards;
    animation-delay: 0.5s;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
    animation: none;
}

@keyframes fadeInFallback {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 国旗SVG图片样式 */
img.flag {
    display: inline-block;
    width: 48px;
    height: 32px;
    border-radius: 4px;
    object-fit: cover;
    vertical-align: middle;
    border: 1px solid rgba(255,255,255,0.2);
}