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

:root {
    --bg-primary: #1a1a1e;
    --bg-secondary: #222228;
    --bg-card: #1e1e24;
    --border-color: #2a2a32;
    --text-primary: #b8bcc4;
    --text-secondary: #8a8f9a;
    --text-tertiary: #6a6e78;
    --text-accent: #7aa2a2;
    --border-line: #33333b;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    line-height: 1.7;
    min-height: 100vh;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航 */
.nav {
    border-bottom: 1px solid var(--border-line);
    padding: 24px 0;
    margin-bottom: 48px;
}

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

.nav-logo {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-accent);
}

/* 移动端菜单 */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 20px;
    cursor: pointer;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border-line);
    }
    
    .nav-links.active {
        display: flex;
    }
}

/* 页面标题 */
.page-title {
    margin-bottom: 48px;
}

.page-title h1 {
    font-size: 32px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.page-title p {
    color: var(--text-tertiary);
    font-size: 14px;
}

/* 首页 Hero */
.hero {
    text-align: center;
    padding: 48px 0 64px;
}

.hero h1 {
    font-size: 36px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.4;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-accent);
    margin-bottom: 48px;
}

/* 营业执照卡片 */
.license-card {
    background: var(--bg-card);
    border: 1px solid var(--border-line);
    border-radius: 8px;
    padding: 32px;
    max-width: 600px;
    margin: 0 auto 64px;
}

.license-title {
    font-size: 12px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.license-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.license-item:last-child {
    border-bottom: none;
}

.license-label {
    color: var(--text-tertiary);
    font-size: 14px;
}

.license-value {
    color: var(--text-primary);
    font-size: 14px;
}

/* 业务展示 */
.business-section {
    margin-bottom: 64px;
}

.section-title {
    font-size: 20px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 32px;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.business-card {
    background: var(--bg-card);
    border: 1px solid var(--border-line);
    border-radius: 8px;
    padding: 28px;
    transition: border-color 0.2s;
}

.business-card:hover {
    border-color: var(--text-accent);
}

.business-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 20px;
    opacity: 0.6;
}

.business-card h3 {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.business-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 平台列表 */
.platforms {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-bottom: 48px;
}

.platform-tag {
    background: var(--bg-secondary);
    border: 1px solid var(--border-line);
    border-radius: 20px;
    padding: 8px 20px;
    font-size: 14px;
    color: var(--text-secondary);
}

/* 内容页 */
.content-card {
    background: var(--bg-card);
    border: 1px solid var(--border-line);
    border-radius: 8px;
    padding: 48px;
    margin-bottom: 64px;
}

@media (max-width: 768px) {
    .content-card {
        padding: 24px;
    }
}

.content-card h2 {
    font-size: 20px;
    font-weight: 500;
    color: var(--text-primary);
    margin: 32px 0 16px;
}

.content-card h2:first-child {
    margin-top: 0;
}

.content-card h3 {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin: 24px 0 12px;
}

.content-card p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 15px;
}

.content-card ul {
    margin: 16px 0;
    padding-left: 24px;
}

.content-card li {
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-size: 15px;
}

/* 服务列表 */
.services-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.service-item {
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.service-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.service-item h3 {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.service-item p {
    color: var(--text-secondary);
    font-size: 15px;
}

/* 页脚 */
.footer {
    border-top: 1px solid var(--border-line);
    padding: 32px 0;
    margin-top: 64px;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: var(--text-tertiary);
    text-decoration: none;
    font-size: 13px;
}

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

.footer-beian {
    color: var(--text-tertiary);
    font-size: 13px;
}

.footer-beian a {
    color: var(--text-tertiary);
    text-decoration: none;
}

.footer-beian a:hover {
    color: var(--text-accent);
}

.footer-copyright {
    color: var(--text-tertiary);
    font-size: 12px;
}

/* 响应式 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .page-title h1 {
        font-size: 26px;
    }
    
    .business-grid {
        grid-template-columns: 1fr;
    }
    
    .license-card {
        padding: 20px;
    }
}