/* 黑兽 - 主样式表 */
/* 2026年SEO优化版本 - 移动端优先设计 */

:root {
    --primary-color: #8B5CF6;
    --secondary-color: #EC4899;
    --accent-color: #06B6D4;
    --dark-bg: #0F0F23;
    --card-bg: #1A1A2E;
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%);
    --gradient-dark: linear-gradient(180deg, #0F0F23 0%, #1A1A2E 100%);
    --shadow-glow: 0 0 30px rgba(139, 92, 246, 0.3);
    --border-radius: 12px;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.8;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 响应式容器 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 16px;
}

@media (min-width: 768px) {
    .container {
        padding: 0 24px;
    }
}

/* 导航栏 - 非sticky设计 */
.site-header {
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.2);
    padding: 12px 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.site-name {
    font-size: 1.25rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 移动端导航菜单 */
.nav-toggle {
    display: block;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    margin: 5px 0;
    transition: var(--transition-smooth);
}

.main-nav {
    width: 100%;
    display: none;
}

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

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-list a {
    display: block;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    border-radius: 8px;
    transition: var(--transition-smooth);
}

.nav-list a:hover,
.nav-list a.active {
    color: var(--text-primary);
    background: rgba(139, 92, 246, 0.15);
}

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }
    
    .main-nav {
        width: auto;
        display: block;
    }
    
    .nav-list {
        flex-direction: row;
        gap: 4px;
    }
    
    .nav-list a {
        padding: 8px 16px;
    }
}

/* CTA按钮 */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-glow);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.5);
}

/* Hero区域 */
.hero-section {
    position: relative;
    min-height: 60vh;
    display: flex;
    align-items: center;
    padding: 40px 0;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
    z-index: -1;
}

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

.hero-title {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.3;
}

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

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 24px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 768px) {
    .hero-section {
        min-height: 70vh;
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .hero-desc {
        font-size: 1.25rem;
    }
}

/* 视频播放模块 */
.video-player-section {
    padding: 40px 0;
    background: var(--card-bg);
}

.video-wrapper {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-glow);
}

.video-placeholder {
    position: relative;
    padding-top: 56.25%;
    background: linear-gradient(135deg, #1A1A2E 0%, #2D2D44 100%);
}

.video-placeholder img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: 0 0 40px rgba(139, 92, 246, 0.5);
}

.play-button:hover {
    transform: translate(-50%, -50%) scale(1.1);
}

.play-button::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 24px solid white;
    border-top: 14px solid transparent;
    border-bottom: 14px solid transparent;
    margin-left: 6px;
}

/* 内容区块 */
.content-section {
    padding: 48px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

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

.section-desc {
    color: var(--text-secondary);
    font-size: 1rem;
    max-width: 600px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .content-section {
        padding: 64px 0;
    }
    
    .section-title {
        font-size: 2.25rem;
    }
}

/* 视频卡片网格 */
.video-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 480px) {
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .video-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
}

@media (min-width: 1024px) {
    .video-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.video-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition-smooth);
    border: 1px solid rgba(139, 92, 246, 0.1);
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
    border-color: rgba(139, 92, 246, 0.3);
}

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

.video-card-thumb img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

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

.video-card-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    padding: 4px 10px;
    background: var(--gradient-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
}

.video-card-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    padding: 2px 8px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    font-size: 0.75rem;
    border-radius: 4px;
}

.video-card-info {
    padding: 16px;
}

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

.video-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.video-card-rating {
    display: flex;
    align-items: center;
    gap: 4px;
    color: #FBBF24;
}

/* 作者信息区块 - E-E-A-T */
.author-section {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    margin: 32px 0;
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.author-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.author-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-color);
}

.author-info h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

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

.author-bio {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* 用户评论区块 */
.reviews-section {
    padding: 48px 0;
}

.reviews-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 768px) {
    .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .reviews-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.review-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    border: 1px solid rgba(139, 92, 246, 0.1);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.reviewer-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.reviewer-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
}

.reviewer-name {
    font-weight: 600;
    margin-bottom: 2px;
}

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

.review-rating {
    display: flex;
    gap: 2px;
    color: #FBBF24;
}

.review-content {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 12px;
}

.review-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
    opacity: 0.7;
}

/* FAQ区块 */
.faq-section {
    padding: 48px 0;
    background: rgba(26, 26, 46, 0.5);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    margin-bottom: 12px;
    border: 1px solid rgba(139, 92, 246, 0.1);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    background: none;
    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-smooth);
}

.faq-question:hover {
    background: rgba(139, 92, 246, 0.1);
}

.faq-icon {
    width: 24px;
    height: 24px;
    position: relative;
    flex-shrink: 0;
}

.faq-icon::before,
.faq-icon::after {
    content: '';
    position: absolute;
    background: var(--primary-color);
    transition: var(--transition-smooth);
}

.faq-icon::before {
    width: 14px;
    height: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.faq-icon::after {
    width: 2px;
    height: 14px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.faq-item.active .faq-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
    opacity: 0;
}

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

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

.faq-answer-content {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 支付方式区块 */
.payment-section {
    padding: 48px 0;
}

.payment-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
}

.payment-item {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border: 1px solid rgba(139, 92, 246, 0.1);
}

.payment-item img {
    height: 32px;
    width: auto;
}

.payment-item span {
    font-size: 0.95rem;
    font-weight: 500;
}

.payment-pix {
    background: linear-gradient(135deg, rgba(0, 189, 174, 0.2) 0%, rgba(0, 189, 174, 0.1) 100%);
    border-color: rgba(0, 189, 174, 0.3);
}

/* 牌照信息区块 */
.license-section {
    padding: 48px 0;
    background: var(--card-bg);
}

.license-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    text-align: center;
}

.license-badge {
    width: 120px;
    height: auto;
}

.license-info h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.license-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

@media (min-width: 768px) {
    .license-content {
        flex-direction: row;
        text-align: left;
    }
    
    .license-badge {
        width: 150px;
    }
}

/* 客户支持区块 */
.support-section {
    padding: 48px 0;
}

.support-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 768px) {
    .support-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.support-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    text-align: center;
    border: 1px solid rgba(139, 92, 246, 0.1);
    transition: var(--transition-smooth);
}

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

.support-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;
}

.support-card h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

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

/* 页脚 */
.site-footer {
    background: #0A0A14;
    padding: 48px 0 24px;
    border-top: 1px solid rgba(139, 92, 246, 0.2);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 32px;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-logo img {
    width: 36px;
    height: 36px;
}

.footer-logo span {
    font-size: 1.1rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-section h5 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

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

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

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

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

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

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(139, 92, 246, 0.1);
    text-align: center;
}

.footer-legal {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-bottom: 16px;
}

.footer-legal a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: var(--transition-smooth);
}

.footer-legal a:hover {
    color: var(--primary-color);
}

.age-restriction {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 8px;
    color: #EF4444;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 16px;
}

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

/* 面包屑导航 */
.breadcrumb {
    padding: 16px 0;
    font-size: 0.9rem;
}

.breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.breadcrumb-list li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb-list a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-smooth);
}

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

.breadcrumb-list .current {
    color: var(--text-primary);
}

.breadcrumb-separator {
    color: var(--text-secondary);
    opacity: 0.5;
}

/* 标签页面 */
.tags-section {
    padding: 48px 0;
}

.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
}

.tag-link {
    display: inline-block;
    padding: 10px 20px;
    background: var(--card-bg);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 50px;
    font-size: 0.95rem;
    border: 1px solid rgba(139, 92, 246, 0.2);
    transition: var(--transition-smooth);
}

.tag-link:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* APP下载页面 */
.app-section {
    padding: 64px 0;
    text-align: center;
}

.app-preview {
    max-width: 300px;
    margin: 0 auto 32px;
}

.app-preview img {
    width: 100%;
    height: auto;
    border-radius: 24px;
    box-shadow: var(--shadow-glow);
}

.app-features {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin: 32px 0;
    text-align: left;
}

@media (min-width: 768px) {
    .app-features {
        grid-template-columns: repeat(3, 1fr);
    }
}

.app-feature {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 24px;
    text-align: center;
}

.app-feature-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.app-download-buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
    margin-top: 32px;
}

@media (min-width: 480px) {
    .app-download-buttons {
        flex-direction: row;
        justify-content: center;
    }
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 14px 28px;
    background: var(--card-bg);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition-smooth);
}

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

.download-btn-icon {
    font-size: 1.5rem;
}

.download-btn-text {
    text-align: left;
}

.download-btn-text small {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.download-btn-text span {
    font-weight: 600;
    font-size: 1rem;
}

/* 内容页面样式 */
.article-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 32px 0;
}

.article-header {
    margin-bottom: 32px;
}

.article-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.4;
}

@media (min-width: 768px) {
    .article-title {
        font-size: 2.25rem;
    }
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.article-body {
    font-size: 1.05rem;
    line-height: 1.9;
}

.article-body h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 32px 0 16px;
    color: var(--text-primary);
}

.article-body h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 24px 0 12px;
    color: var(--text-primary);
}

.article-body p {
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.article-body img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin: 24px 0;
}

.article-body ul,
.article-body ol {
    margin: 16px 0;
    padding-left: 24px;
    color: var(--text-secondary);
}

.article-body li {
    margin-bottom: 8px;
}

/* 关于我们页面 */
.about-hero {
    padding: 64px 0;
    text-align: center;
    background: linear-gradient(180deg, rgba(139, 92, 246, 0.1) 0%, transparent 100%);
}

.about-content {
    padding: 48px 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
}

@media (min-width: 768px) {
    .about-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.about-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 32px;
    border: 1px solid rgba(139, 92, 246, 0.1);
}

.about-card h3 {
    font-size: 1.25rem;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 响应式图片 */
.responsive-img {
    width: 100%;
    height: auto;
    display: block;
}

/* 懒加载占位符 */
.lazy-placeholder {
    background: linear-gradient(90deg, var(--card-bg) 25%, rgba(139, 92, 246, 0.1) 50%, var(--card-bg) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

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

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.mt-4 {
    margin-top: 16px;
}

.mb-4 {
    margin-bottom: 16px;
}

.hidden {
    display: none;
}

/* 打印样式 */
@media print {
    .site-header,
    .site-footer,
    .cta-button {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}