/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #2c3e50;
    background-color: #f8f9fa;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部导航 */
header {
    background-color: #1a365d;
    color: #fff;
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo {
    font-size: 28px;
    font-weight: bold;
    color: #4fd1c7;
    text-decoration: none;
    letter-spacing: 1px;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

nav ul li a:hover {
    color: #4fd1c7;
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: #4fd1c7;
    transition: width 0.3s ease;
}

nav ul li a:hover::after {
    width: 100%;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #1a365d 0%, #2d3748 100%);
    color: #fff;
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%" r="50%"><stop offset="0%" stop-color="rgba(79, 209, 199, 0.1)"></stop><stop offset="100%" stop-color="rgba(26, 54, 93, 0)"></stop></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"></circle><circle cx="800" cy="300" r="150" fill="url(%23a)"></circle><circle cx="400" cy="800" r="120" fill="url(%23a)"></circle><circle cx="900" cy="700" r="80" fill="url(%23a)"></circle></svg>');
    background-size: cover;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

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

.hero h1 {
    font-size: 42px;
    margin-bottom: 25px;
    line-height: 1.2;
    font-weight: bold;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-block;
    background-color: #4fd1c7;
    color: #1a365d;
    padding: 15px 40px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    font-size: 18px;
    transition: all 0.3s ease;
    margin: 0 15px;
    box-shadow: 0 4px 15px rgba(79, 209, 199, 0.3);
}

.cta-button:hover {
    background-color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(79, 209, 199, 0.4);
}

/* 内容区域 */
.content {
    padding: 80px 0;
    background-color: #fff;
}

.section-title {
    font-size: 36px;
    text-align: center;
    margin-bottom: 50px;
    color: #1a365d;
    font-weight: bold;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 80px;
    height: 4px;
    background-color: #4fd1c7;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

/* 特性卡片样式 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.feature-card {
    background-color: #f8f9fa;
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border-top: 4px solid #4fd1c7;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.feature-card h3 {
    color: #1a365d;
    margin-bottom: 20px;
    font-size: 24px;
    font-weight: bold;
}

.feature-card p {
    color: #4a5568;
    line-height: 1.7;
}

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

.download-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.download-card {
    background-color: #fff;
    padding: 40px 30px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.download-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
    border-color: #4fd1c7;
}

.download-card h3 {
    color: #1a365d;
    margin-bottom: 20px;
    font-size: 24px;
    font-weight: bold;
}

/* 教程步骤样式 */
.tutorial-steps {
    max-width: 900px;
    margin: 0 auto;
}

.step {
    background-color: #f8f9fa;
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 25px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
    padding-left: 70px;
}

.step:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.step::before {
    content: attr(data-step);
    position: absolute;
    left: 20px;
    top: 30px;
    width: 40px;
    height: 40px;
    background-color: #4fd1c7;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 18px;
}

.step h3 {
    color: #1a365d;
    margin-bottom: 15px;
    font-size: 22px;
    font-weight: bold;
}

/* 新闻列表样式 */
.news-list {
    max-width: 900px;
    margin: 0 auto;
}

.news-item {
    background-color: #f8f9fa;
    padding: 35px;
    border-radius: 15px;
    margin-bottom: 25px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.news-item h3 {
    color: #1a365d;
    margin-bottom: 15px;
    font-size: 24px;
    font-weight: bold;
}

.news-item .date {
    color: #718096;
    font-size: 14px;
    margin-bottom: 20px;
    display: block;
}

/* FAQ样式 */
.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background-color: #f8f9fa;
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.faq-item h3 {
    color: #1a365d;
    margin-bottom: 15px;
    font-size: 20px;
    font-weight: bold;
}

/* 社交媒体分享样式 */
.social-share {
    margin: 50px 0;
    text-align: center;
}

.social-share h4 {
    margin-bottom: 25px;
    color: #1a365d;
    font-size: 20px;
    font-weight: bold;
}

.social-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.social-btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    font-size: 16px;
}

.social-btn.weibo {
    background-color: #e6162d;
    color: #fff;
}

.social-btn.weixin {
    background-color: #07c160;
    color: #fff;
}

.social-btn.qq {
    background-color: #12b7f5;
    color: #fff;
}

.social-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
}

/* 页脚样式 */
footer {
    background-color: #1a365d;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    margin-bottom: 25px;
    color: #4fd1c7;
    font-size: 20px;
    font-weight: bold;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 15px;
}

.footer-section ul li a {
    color: #e2e8f0;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-section ul li a:hover {
    color: #4fd1c7;
    transform: translateX(5px);
}

.copyright {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: #a0aec0;
    font-size: 14px;
}

/* 网站地图样式 */
.sitemap {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
}

.sitemap-section h3 {
    color: #1a365d;
    margin-bottom: 25px;
    font-size: 20px;
    font-weight: bold;
    position: relative;
    padding-bottom: 10px;
}

.sitemap-section h3::after {
    content: '';
    position: absolute;
    width: 50px;
    height: 3px;
    background-color: #4fd1c7;
    bottom: 0;
    left: 0;
    border-radius: 2px;
}

.sitemap-section ul {
    list-style: none;
}

.sitemap-section ul li {
    margin-bottom: 15px;
}

.sitemap-section ul li a {
    color: #4a5568;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.sitemap-section ul li a:hover {
    color: #4fd1c7;
    transform: translateX(5px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
    }
    
    nav ul {
        margin-top: 25px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav ul li {
        margin: 0 15px;
        margin-bottom: 10px;
    }
    
    .hero h1 {
        font-size: 32px;
    }
    
    .hero p {
        font-size: 18px;
    }
    
    .cta-button {
        display: block;
        margin: 15px auto;
        width: 90%;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .download-options {
        grid-template-columns: 1fr;
    }
    
    .step {
        padding-left: 60px;
    }
    
    .step::before {
        width: 35px;
        height: 35px;
        font-size: 16px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .social-btn {
        width: 200px;
        text-align: center;
    }
}

/* 全球加速元素 */
.global-elements {
    position: relative;
    overflow: hidden;
}

.global-elements::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(79, 209, 199, 0.1), transparent);
    animation: slide 3s ease-in-out infinite;
}

@keyframes slide {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* 按钮动画 */
.btn-pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(79, 209, 199, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(79, 209, 199, 0); }
    100% { box-shadow: 0 0 0 0 rgba(79, 209, 199, 0); }
}