/* 全局样式 - 已移除外部字体，使用系统字体加快加载 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #DC143C;
    --primary-dark: #B91224;
    --accent-color: #FFD700;
    --text-color: #2C3E50;
    --text-light: #6B7280;
    --bg-color: #F8F9FA;
    --border-color: #E5E7EB;
    --white: #FFFFFF;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', '微软雅黑', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    color: var(--text-color);
    background: #FFFFFF;
    line-height: 1.6;
    min-height: 100vh;
    margin: 0;
    padding: 0;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'PingFang SC', 'Microsoft YaHei', '微软雅黑', 'STSong', '华文宋体', serif;
    font-weight: 600;
    line-height: 1.3;
    color: #1C1C1E;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
}

.btn-link {
    background: transparent;
    color: var(--text-light);
    padding: 8px 16px;
}

.btn-link:hover {
    color: var(--primary-color);
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

/* 导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    z-index: 1000;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
}

.logo-icon {
    font-size: 28px;
}

.nav {
    display: flex;
    gap: 32px;
    flex: 1;
    margin: 0 48px;
}

.nav-link {
    color: var(--text-color);
    font-size: 15px;
    transition: color 0.3s;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.header-actions {
    display: flex;
    gap: 12px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 20px;
    z-index: 999;
}

.mobile-menu a {
    display: block;
    padding: 12px 0;
    color: var(--text-color);
}

.mobile-menu hr {
    margin: 12px 0;
    border: none;
    border-top: 1px solid var(--border-color);
}

/* Hero区域 */
.hero {
    margin-top: 64px;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 80px 24px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.hero-content {
    max-width: 600px;
}

.hero-title {
    font-size: 48px;
    margin-bottom: 24px;
}

.highlight {
    color: var(--primary-color);
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 8px;
    background: var(--accent-color);
    opacity: 0.3;
    z-index: -1;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 32px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    font-family: 'Noto Serif SC', serif;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 4px;
}

.hero-illustration {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.illustration-circle {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, rgba(220, 20, 60, 0.1), rgba(255, 215, 0, 0.1));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 120px;
}

/* 区块标题 */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 36px;
    margin-bottom: 12px;
}

.section-header p {
    font-size: 16px;
    color: var(--text-light);
}

/* 功能特色 */
.features {
    padding: 80px 0;
    background: transparent;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.feature-card {
    text-align: center;
    padding: 32px 24px;
    background: #FAFAFA;
    border-radius: 12px;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 18px;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* 文化主题展示 */
.culture-highlight {
    padding: 80px 0;
    background: var(--bg-color);
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.culture-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.culture-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.12);
}

.culture-image {
    position: relative;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.culture-emoji {
    font-size: 60px;
}

.culture-tag {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    color: white;
}

.culture-tag.philosophy {
    background: #8B4513;
}

.culture-tag.arts {
    background: #DC143C;
}

.culture-tag.architecture {
    background: #B8860B;
}

.culture-content {
    padding: 24px;
}

.culture-content h3 {
    font-size: 16px;
    margin-bottom: 8px;
    line-height: 1.4;
}

.culture-cn {
    font-size: 14px;
    color: var(--primary-color);
    font-family: 'Noto Serif SC', serif;
    margin-bottom: 12px;
}

.culture-desc {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

/* 页脚 */
.footer {
    background: #1C1C1E;
    color: #E5E7EB;
    padding: 60px 0 20px;
    margin-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer h3 {
    color: white;
    font-size: 18px;
    margin-bottom: 20px;
}

.footer p {
    color: #9CA3AF;
    line-height: 1.8;
    margin-bottom: 8px;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 12px;
}

.footer a {
    color: #9CA3AF;
    transition: color 0.3s;
}

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

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid #374151;
    text-align: center;
}

.footer-bottom p {
    margin: 4px 0;
    font-size: 14px;
    color: #6B7280;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav,
    .header-actions .btn-link,
    .header-actions .btn-primary {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .hero {
        flex-direction: column;
        text-align: center;
        padding: 48px 24px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-illustration {
        display: none;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .hero-stats {
        gap: 24px;
        justify-content: center;
    }

    .stat-number {
        font-size: 28px;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .features,
    .culture-highlight {
        padding: 60px 0;
    }

    .footer {
        padding: 40px 0 20px;
    }
}

@media (max-width: 1024px) {
    .header-actions .btn-link {
        display: none;
    }
}