/* 
 * 台球下注 - 体育赛事直播平台
 * 主样式文件 - 2026年SEO优化版
 * 移动端优先设计
 */

/* ========== CSS变量定义 ========== */
:root {
    --primary-color: #1565c0;
    --primary-dark: #0d47a1;
    --primary-light: #42a5f5;
    --secondary-color: #ff6f00;
    --secondary-dark: #e65100;
    --secondary-light: #ffab40;
    --accent-color: #00c853;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a6a;
    --text-light: #6c6c8a;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fc;
    --bg-dark: #0f1419;
    --bg-card: #ffffff;
    --border-color: #e8e8f0;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.16);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --font-primary: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --font-heading: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.75;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

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

ul, ol {
    list-style: none;
}

/* ========== 排版系统 ========== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

h1 { font-size: clamp(1.75rem, 5vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }
h4 { font-size: clamp(1.125rem, 2.5vw, 1.25rem); }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* ========== 容器布局 ========== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1rem;
}

@media (min-width: 768px) {
    .container {
        padding: 0 2rem;
    }
}

/* ========== 头部导航 ========== */
.site-header {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2332 100%);
    padding: 0.75rem 0;
    position: relative;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.5px;
}

.logo-text span {
    color: var(--secondary-color);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: #ffffff;
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* 主导航 */
.main-nav {
    display: none;
    width: 100%;
    padding-top: 1rem;
}

.main-nav.active {
    display: block;
}

.nav-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-list a {
    display: block;
    padding: 0.75rem 1rem;
    color: rgba(255,255,255,0.85);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav-list a:hover,
.nav-list a.active {
    background: rgba(255,255,255,0.1);
    color: var(--secondary-color);
}

@media (min-width: 992px) {
    .mobile-menu-btn {
        display: none;
    }
    
    .main-nav {
        display: block;
        width: auto;
        padding-top: 0;
    }
    
    .nav-list {
        flex-direction: row;
        gap: 0.25rem;
    }
    
    .nav-list a {
        padding: 0.5rem 1rem;
    }
}

/* CTA按钮 */
.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-dark) 100%);
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-xl);
    border: none;
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: 0 4px 15px rgba(255,111,0,0.35);
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255,111,0,0.45);
    color: #ffffff;
}

/* ========== Hero区域 ========== */
.hero-section {
    position: relative;
    min-height: 60vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15,20,25,0.92) 0%, rgba(21,101,192,0.75) 100%);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    padding: 3rem 0;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    color: #ffffff;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--accent-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(2rem, 6vw, 3.5rem);
    color: #ffffff;
    margin-bottom: 1rem;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.hero-title span {
    color: var(--secondary-color);
}

.hero-desc {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: rgba(255,255,255,0.85);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.hero-btn-primary {
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--secondary-color) 0%, #ff8f00 100%);
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 20px rgba(255,111,0,0.4);
    transition: var(--transition-normal);
}

.hero-btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255,111,0,0.5);
    color: #ffffff;
}

.hero-btn-secondary {
    padding: 1rem 2rem;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    color: #ffffff;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255,255,255,0.3);
    transition: var(--transition-normal);
}

.hero-btn-secondary:hover {
    background: rgba(255,255,255,0.25);
    color: #ffffff;
}

/* ========== 面包屑导航 ========== */
.breadcrumb {
    padding: 1rem 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-light);
}

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

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

.breadcrumb-item.active {
    color: var(--primary-color);
    font-weight: 500;
}

.breadcrumb-separator {
    color: var(--text-light);
}

/* ========== 内容区块 ========== */
.section {
    padding: 3rem 0;
}

.section-alt {
    background: var(--bg-primary);
}

.section-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-badge {
    display: inline-block;
    padding: 0.35rem 1rem;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: var(--radius-xl);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title {
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.section-desc {
    max-width: 700px;
    margin: 1.5rem auto 0;
    color: var(--text-secondary);
}

/* ========== 卡片组件 ========== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

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

.card-image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.card-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.35rem 0.75rem;
    background: var(--secondary-color);
    color: #ffffff;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
}

.card-body {
    padding: 1.25rem;
}

.card-title {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.card-title a {
    color: var(--text-primary);
}

.card-title a:hover {
    color: var(--primary-color);
}

.card-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ========== 特色卡片 ========== */
.feature-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
    border-radius: var(--radius-md);
    font-size: 2rem;
}

.feature-title {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
}

.feature-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ========== 作者信息 ========== */
.author-box {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin: 2rem 0;
}

.author-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-light);
}

.author-info {
    flex: 1;
    min-width: 200px;
}

.author-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.author-title {
    font-size: 0.9rem;
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.author-bio {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ========== 评论区域 ========== */
.review-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.review-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-size: 1.25rem;
    font-weight: 700;
}

.review-meta {
    flex: 1;
}

.review-name {
    font-weight: 600;
    font-size: 1rem;
}

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

.review-rating {
    display: flex;
    gap: 2px;
}

.star {
    color: #ffc107;
    font-size: 1rem;
}

.star.empty {
    color: #e0e0e0;
}

.review-content {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0.75rem;
}

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

/* ========== FAQ区域 ========== */
.faq-item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.faq-question {
    width: 100%;
    padding: 1.25rem 1.5rem;
    background: transparent;
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-fast);
}

.faq-question:hover {
    background: var(--bg-secondary);
}

.faq-icon {
    font-size: 1.25rem;
    color: var(--primary-color);
    transition: transform var(--transition-fast);
}

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

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

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer-inner {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ========== 支付方式 ========== */
.payment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.payment-item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.payment-item:hover {
    border-color: var(--primary-light);
    transform: translateY(-3px);
}

.payment-item img {
    max-height: 40px;
    margin: 0 auto 0.75rem;
}

.payment-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ========== 牌照信息 ========== */
.license-box {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    align-items: center;
    padding: 2rem;
    background: linear-gradient(135deg, #1a237e 0%, #0d47a1 100%);
    border-radius: var(--radius-lg);
    color: #ffffff;
}

.license-badge-img {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-md);
    object-fit: contain;
    background: rgba(255,255,255,0.1);
    padding: 0.5rem;
}

.license-info {
    flex: 1;
    min-width: 250px;
}

.license-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #ffffff;
}

.license-number {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 0.75rem;
}

.license-desc {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
}

/* ========== 客服支持 ========== */
.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.5rem;
}

.support-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition-normal);
}

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

.support-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent-color) 0%, #00a844 100%);
    border-radius: 50%;
    font-size: 1.5rem;
}

.support-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.support-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ========== 标签页面 ========== */
.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.tag-item {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.tag-item:hover {
    background: var(--primary-color);
    color: #ffffff;
    border-color: var(--primary-color);
}

/* ========== 页脚 ========== */
.site-footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,0.8);
    padding-top: 4rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 2rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand {
    grid-column: 1 / -1;
}

@media (min-width: 768px) {
    .footer-brand {
        grid-column: span 1;
    }
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.footer-logo img {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
}

.footer-logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: #ffffff;
}

.footer-desc {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.footer-social {
    display: flex;
    gap: 0.75rem;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    color: #ffffff;
    font-size: 1.1rem;
    transition: var(--transition-fast);
}

.social-link:hover {
    background: var(--primary-color);
    color: #ffffff;
}

.footer-title {
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 1.25rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    padding: 1.5rem 0;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: center;
    justify-content: space-between;
}

.footer-copyright {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

.footer-badges {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-badges img {
    height: 40px;
    width: auto;
}

.age-badge {
    width: 50px;
    height: 50px;
    border-radius: 50%;
}

/* ========== 响应式图片 ========== */
.responsive-img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
}

/* ========== 内容文章 ========== */
.article-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
}

@media (min-width: 768px) {
    .article-content {
        padding: 3rem;
    }
}

.article-content h2 {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.article-content h2:first-child {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.article-content p {
    text-align: justify;
}

.article-content img {
    margin: 1.5rem 0;
    border-radius: var(--radius-md);
}

.article-content ul,
.article-content ol {
    margin: 1rem 0 1.5rem 1.5rem;
}

.article-content li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.article-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* ========== 表格样式 ========== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tr:hover td {
    background: var(--bg-secondary);
}

/* ========== 负责任体育 ========== */
.responsible-box {
    background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
    border-radius: var(--radius-lg);
    padding: 2rem;
    border-left: 4px solid var(--secondary-color);
}

.responsible-title {
    color: var(--secondary-dark);
    margin-bottom: 1rem;
}

.responsible-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.responsible-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.responsible-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--secondary-color);
    color: #ffffff;
    border-radius: 50%;
    font-size: 0.75rem;
}

.responsible-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ========== 动画效果 ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

/* ========== 工具类 ========== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.py-2 { padding-top: 1rem; padding-bottom: 1rem; }
.py-3 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-4 { padding-top: 2rem; padding-bottom: 2rem; }

.hidden { display: none; }
.visible { display: block; }

/* ========== 打印样式 ========== */
@media print {
    .site-header,
    .site-footer,
    .cta-btn {
        display: none;
    }
    
    body {
        background: #ffffff;
        color: #000000;
    }
}