/* 重置样式和基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮样式 */
.btn-primary {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0056b3, #004085);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 123, 255, 0.3);
}

.btn-large {
    padding: 16px 32px;
    font-size: 18px;
}

.btn-secondary {
    background: transparent;
    color: #007bff;
    border: 2px solid #007bff;
    padding: 12px 24px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: #007bff;
    color: white;
}

.btn-login {
    background: transparent;
    color: #333;
    border: 1px solid #ddd;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    margin-right: 10px;
    transition: all 0.3s ease;
}

.btn-login:hover {
    background: #f8f9fa;
}

/* 导航栏 */
.navbar {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand h2 {
    color: #007bff;
    font-size: 24px;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #007bff;
}

.nav-actions {
    display: flex;
    align-items: center;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 优惠横幅 */
.promo-banner {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white;
    text-align: center;
    padding: 10px 0;
    margin-top: 70px;
}

.promo-text {
    font-weight: 600;
    font-size: 14px;
}

/* 主横幅区域 */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 100px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.hero-features span {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 3rem;
}

.stat {
    text-align: center;
}

.stat strong {
    display: block;
    font-size: 2rem;
    font-weight: 700;
}

.stat span {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 地球动画 */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.globe-animation {
    position: relative;
    width: 300px;
    height: 300px;
}

.globe {
    width: 200px;
    height: 200px;
    background: radial-gradient(circle at 30% 30%, #4facfe, #00f2fe);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: rotate 20s linear infinite;
}

.connection-dots {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.dot {
    position: absolute;
    width: 8px;
    height: 8px;
    background: #fff;
    border-radius: 50%;
    animation: pulse 2s infinite;
    animation-delay: var(--delay);
}

.dot:nth-child(1) { top: 20%; left: 10%; }
.dot:nth-child(2) { top: 80%; left: 30%; }
.dot:nth-child(3) { top: 40%; left: 90%; }
.dot:nth-child(4) { top: 70%; left: 70%; }

@keyframes rotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.7; }
    50% { transform: scale(1.5); opacity: 1; }
}

/* 下载区域 */
.download-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.download-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.download-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.download-card:hover {
    transform: translateY(-5px);
}

.platform-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.download-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.version, .size, .support {
    margin-bottom: 0.5rem;
    color: #666;
}

/* 对比区域 */
.comparison-section {
    padding: 80px 0;
}

.comparison-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.comparison-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.tab-btn {
    padding: 0.8rem 1.5rem;
    border: 2px solid #007bff;
    background: transparent;
    color: #007bff;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: #007bff;
    color: white;
}

.comparison-table {
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: center;
    border-bottom: 1px solid #eee;
}

.comparison-table th {
    background: #007bff;
    color: white;
    font-weight: 600;
}

.comparison-table tr:nth-child(even) {
    background: #f8f9fa;
}

/* 功能特性 */
.features-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.features-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #333;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* 快速指南 */
.guide-section {
    padding: 80px 0;
}

.guide-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step {
    text-align: center;
    padding: 2rem;
}

.step-number {
    width: 60px;
    height: 60px;
    background: #007bff;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.step h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.step p {
    color: #666;
}

/* 全球服务器覆盖 */
.servers-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.servers-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.servers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.server-region {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.server-region:hover {
    transform: translateY(-5px);
}

.region-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.server-region h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.server-count {
    font-size: 1.2rem;
    font-weight: 600;
    color: #007bff;
    margin-bottom: 0.5rem;
}

.latency {
    color: #666;
    margin-bottom: 1rem;
}

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

.server-list li {
    padding: 0.3rem 0;
    color: #666;
    border-bottom: 1px solid #f0f0f0;
}

.server-list li:last-child {
    border-bottom: none;
}

/* 用户评价 */
.testimonials-section {
    padding: 80px 0;
}

.testimonials-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.testimonial-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-5px);
}

.testimonial-content {
    font-style: italic;
    color: #555;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    position: relative;
}

.testimonial-content::before {
    content: '"';
    font-size: 3rem;
    color: #007bff;
    position: absolute;
    top: -10px;
    left: -10px;
    opacity: 0.3;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar {
    width: 50px;
    height: 50px;
    background: #f0f0f0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-info strong {
    color: #333;
    font-weight: 600;
}

.author-info span {
    color: #666;
    font-size: 0.9rem;
}

/* FAQ区域 */
.faq-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.faq-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.faq-categories {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.category-btn {
    padding: 0.8rem 1.5rem;
    border: 2px solid #007bff;
    background: transparent;
    color: #007bff;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.category-btn.active {
    background: #007bff;
    color: white;
}

.faq-category {
    display: none;
}

.faq-category.active {
    display: block;
}

.faq-item {
    background: white;
    margin-bottom: 1rem;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.faq-question {
    padding: 1.5rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: #666;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

/* 价格套餐 */
.pricing-section {
    padding: 80px 0;
}

.pricing-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.pricing-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: relative;
    transition: transform 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-5px);
}

.pricing-card.popular {
    border: 2px solid #007bff;
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: #ff6b6b;
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.price {
    font-size: 3rem;
    font-weight: 700;
    color: #007bff;
    margin-bottom: 1rem;
}

.price span {
    font-size: 1rem;
    color: #666;
}

.pricing-card ul {
    list-style: none;
    margin-bottom: 2rem;
}

.pricing-card li {
    padding: 0.5rem 0;
    color: #666;
}

/* 页脚 */
.footer {
    background: #333;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #fff;
}

.footer-section a {
    display: block;
    color: #ccc;
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #007bff;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #555;
    color: #ccc;
}

/* 友情链接 */
.friendship-links {
    background: #f8f9fa;
    padding: 60px 0;
}

.friendship-links h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: #333;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.link-category {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.link-category h4 {
    color: #007bff;
    font-size: 1.2rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid #007bff;
    padding-bottom: 0.5rem;
}

.links-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.links-list a {
    color: #666;
    text-decoration: none;
    transition: all 0.3s ease;
    padding: 0.5rem 0;
    border-bottom: 1px solid #f0f0f0;
}

.links-list a:hover {
    color: #007bff;
    transform: translateX(5px);
}

.links-list a:last-child {
    border-bottom: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        padding: 1rem 0;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .comparison-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .faq-categories {
        flex-direction: column;
        align-items: center;
    }
    
    .pricing-card.popular {
        transform: none;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .download-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .guide-steps {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
}