/* TradingView 官网样式文件 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* 头部导航 */
header {
    background: linear-gradient(135deg, #1e88e5 0%, #1565c0 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 0.8;
}

/* 主内容区 */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* 首页横幅 */
.hero {
    background: linear-gradient(135deg, #1e88e5 0%, #1565c0 100%);
    color: white;
    padding: 4rem 2rem;
    text-align: center;
    border-radius: 10px;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

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

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: white;
    color: #1e88e5;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* 功能卡片 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

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

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.feature-card h3 {
    color: #1e88e5;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-card p {
    color: #666;
    line-height: 1.8;
}

/* 内容区域 */
.content-section {
    background: white;
    padding: 3rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.content-section h2 {
    color: #1e88e5;
    margin-bottom: 1.5rem;
    font-size: 2rem;
    border-bottom: 3px solid #1e88e5;
    padding-bottom: 0.5rem;
}

.content-section h3 {
    color: #333;
    margin: 1.5rem 0 1rem;
    font-size: 1.5rem;
}

.content-section p {
    margin-bottom: 1rem;
    line-height: 1.8;
    color: #555;
}

/* FAQ 样式 */
.faq-item {
    background: #f9f9f9;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    border-left: 4px solid #1e88e5;
}

.faq-item h3 {
    color: #1e88e5;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.faq-item ol {
    margin-left: 1.5rem;
    line-height: 2;
}

.faq-item li {
    margin-bottom: 0.5rem;
    color: #555;
}

/* 下载按钮 */
.download-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.download-btn {
    display: block;
    padding: 1.5rem;
    background: linear-gradient(135deg, #1e88e5 0%, #1565c0 100%);
    color: white;
    text-align: center;
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(30, 136, 229, 0.4);
}

.download-btn .icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* 页脚 */
footer {
    background: #2c3e50;
    color: white;
    padding: 3rem 2rem 1rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: #1e88e5;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #bbb;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #444;
    color: #888;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .content-section {
        padding: 1.5rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* 面包屑导航 */
.breadcrumb {
    background: white;
    padding: 1rem 2rem;
    border-radius: 5px;
    margin-bottom: 2rem;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.breadcrumb a {
    color: #1e88e5;
    text-decoration: none;
}

.breadcrumb span {
    color: #999;
    margin: 0 0.5rem;
}

/* 表格样式 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background: #1e88e5;
    color: white;
    font-weight: bold;
}

tr:hover {
    background: #f9f9f9;
}