/* ============================================
   足球预测分析平台 - 主样式文件
   版本：1.0
   最后更新：2026-03-07
   ============================================ */

/* CSS 变量定义 */
:root {
    /* 主色调 */
    --primary-color: #2ecc71;
    --primary-dark: #27ae60;
    --primary-light: #58d68d;
    
    /* 辅助色 */
    --secondary-color: #3498db;
    --secondary-dark: #2980b9;
    
    /* 强调色 */
    --accent-color: #f39c12;
    --accent-dark: #d35400;
    
    /* 中性色 */
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-light: #ecf0f1;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-dark: #1a252f;
    
    /* 状态色 */
    --success: #2ecc71;
    --warning: #f39c12;
    --danger: #e74c3c;
    --info: #3498db;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.2);
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* 重置样式 */
* {
    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", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* 通用标题样式 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }

p {
    margin-bottom: var(--spacing-sm);
}

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

a:hover {
    color: var(--primary-dark);
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: white;
}

.btn-outline {
    background-color: transparent;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.btn-secondary {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: var(--secondary-dark);
    border-color: var(--secondary-dark);
    color: white;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ============================================
   导航栏
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    background-color: rgba(255, 255, 255, 0.98);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    min-height: 70px;
}

.logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.auth-buttons {
    display: flex;
    gap: var(--spacing-sm);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ============================================
   主横幅区域
   ============================================ */
.hero {
    position: relative;
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/><circle cx="50" cy="50" r="30" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/><circle cx="50" cy="50" r="20" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></svg>');
    background-size: 100px 100px;
    opacity: 0.3;
    animation: rotate 60s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.hero-title .highlight {
    display: block;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.hero-title .subtitle {
    display: block;
    font-size: 1.5rem;
    font-weight: 400;
    opacity: 0.9;
}

.hero-description {
    font-size: 1.25rem;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    opacity: 0.95;
    animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease 0.4s backwards;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-color);
}

.stat-label {
    display: block;
    font-size: 1rem;
    opacity: 0.9;
    margin-top: var(--spacing-xs);
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.hero-cta .btn-outline {
    border-color: white;
    color: white;
}

.hero-cta .btn-outline:hover {
    background-color: white;
    color: var(--primary-color);
}

/* 淡入上滑动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   通用区块样式
   ============================================ */
section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.date-display {
    margin-top: var(--spacing-sm);
    font-size: 1rem;
    color: var(--primary-color);
    font-weight: 500;
}

/* ============================================
   今日预测模块
   ============================================ */
.predictions {
    background-color: var(--bg-secondary);
}

.filter-bar {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.filter-group label {
    font-weight: 500;
    color: var(--text-primary);
}

.filter-select {
    padding: 0.5rem 1rem;
    border: 1px solid #ddd;
    border-radius: var(--radius-md);
    background-color: white;
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.filter-select:hover,
.filter-select:focus {
    border-color: var(--primary-color);
    outline: none;
}

.predictions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.prediction-card {
    background-color: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    cursor: pointer;
}

.prediction-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.prediction-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid #eee;
}

.league-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

.confidence-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

.confidence-high {
    background-color: var(--success);
    color: white;
}

.confidence-medium {
    background-color: var(--warning);
    color: white;
}

.confidence-low {
    background-color: var(--text-secondary);
    color: white;
}

.match-teams {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.team {
    text-align: center;
    flex: 1;
}

.team-logo {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--bg-secondary);
    margin: 0 auto var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.team-name {
    font-weight: 500;
    font-size: 0.95rem;
}

.vs {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-secondary);
    padding: 0 var(--spacing-md);
}

.match-info {
    text-align: center;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.match-time {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.prediction-content {
    margin-top: var(--spacing-md);
}

.prediction-item {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid #f5f5f5;
}

.prediction-item:last-child {
    border-bottom: none;
}

.prediction-label {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.prediction-value {
    font-weight: 600;
    color: var(--primary-color);
}

.load-more-container {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* ============================================
   赛事数据模块
   ============================================ */
.matches {
    background-color: var(--bg-primary);
}

.tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.tab-btn {
    padding: 0.75rem 2rem;
    background-color: var(--bg-secondary);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    background-color: var(--primary-light);
    color: white;
}

.tab-btn.active {
    background-color: var(--primary-color);
    color: white;
}

.matches-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.match-card {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.match-card:hover {
    box-shadow: var(--shadow-md);
    background-color: white;
}

.match-status {
    width: 80px;
    text-align: center;
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: 0.875rem;
}

.status-live {
    background-color: var(--danger);
    color: white;
    animation: pulse 1.5s infinite;
}

.status-upcoming {
    background-color: var(--info);
    color: white;
}

.status-finished {
    background-color: var(--text-secondary);
    color: white;
}

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

.match-details {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.match-score {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 120px;
    text-align: center;
}

.match-meta {
    min-width: 150px;
}

.match-league {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.match-date {
    font-size: 0.875rem;
    color: var(--text-primary);
    font-weight: 500;
}

.match-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* ============================================
   专业分析模块
   ============================================ */
.analysis {
    background-color: var(--bg-secondary);
}

.analysis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.analysis-card {
    background-color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    text-align: center;
}

.analysis-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.analysis-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.analysis-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.analysis-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.analysis-features {
    list-style: none;
    text-align: left;
}

.analysis-features li {
    padding: var(--spacing-xs) 0;
    color: var(--text-primary);
    font-size: 0.95rem;
}

/* ============================================
   历史战绩模块
   ============================================ */
.history {
    background-color: var(--bg-primary);
}

.history-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.history-stat-card {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.stat-value {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
    margin-bottom: var(--spacing-xs);
}

.stat-trend {
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    display: inline-block;
}

.stat-trend.positive {
    background-color: rgba(255, 255, 255, 0.2);
}

.stat-trend.neutral {
    background-color: rgba(255, 255, 255, 0.1);
}

.history-table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    background-color: white;
}

.history-table thead {
    background-color: var(--primary-color);
    color: white;
}

.history-table th,
.history-table td {
    padding: var(--spacing-md);
    text-align: left;
}

.history-table th {
    font-weight: 600;
    font-size: 0.95rem;
}

.history-table tbody tr {
    border-bottom: 1px solid #eee;
    transition: background-color var(--transition-fast);
}

.history-table tbody tr:hover {
    background-color: var(--bg-secondary);
}

.history-table .result-win {
    color: var(--success);
    font-weight: 600;
}

.history-table .result-loss {
    color: var(--danger);
    font-weight: 600;
}

/* ============================================
   特性展示
   ============================================ */
.features {
    background-color: var(--bg-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.feature-item {
    text-align: center;
    padding: var(--spacing-lg);
}

.feature-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.feature-item h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-item p {
    color: var(--text-secondary);
}

/* ============================================
   CTA 区域
   ============================================ */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 100px 0;
}

.cta-content {
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.cta-buttons .btn-outline {
    border-color: white;
    color: white;
}

.cta-buttons .btn-outline:hover {
    background-color: white;
    color: var(--primary-color);
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background-color: var(--bg-dark);
    color: var(--text-light);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-column h4 {
    color: white;
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.footer-column p {
    opacity: 0.8;
    line-height: 1.8;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--text-light);
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--primary-light);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.social-icon {
    font-size: 1.5rem;
    display: inline-block;
    transition: transform var(--transition-fast);
}

.social-icon:hover {
    transform: scale(1.2);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    opacity: 0.8;
    margin-bottom: var(--spacing-xs);
}

.disclaimer-text {
    font-size: 0.875rem;
    opacity: 0.6;
}

/* ============================================
   回到顶部按钮
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-5px);
}

/* ============================================
   动画类
   ============================================ */
.fade-in {
    opacity: 0;
    transition: opacity var(--transition-base);
}

.fade-in.visible {
    opacity: 1;
}

.slide-up {
    transform: translateY(30px);
    opacity: 0;
    transition: all var(--transition-base);
}

.slide-up.visible {
    transform: translateY(0);
    opacity: 1;
}