/* FinTech Blog - 金融科技博客样式 */

/* 基础变量 */
:root {
    --primary-color: #7c3aed;
    --secondary-color: #06b6d4;
    --bg-color: #0f172a;
    --surface-color: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --gradient-primary: linear-gradient(135deg, #7c3aed 0%, #06b6d4 100%);
    --border-color: #334155;
    --hover-bg: rgba(124, 58, 237, 0.1);
}

/* 重置样式 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

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

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

img {
    max-width: 100%;
    height: auto;
}

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

/* 头部导航 */
.header {
    background: linear-gradient(180deg, var(--surface-color) 0%, rgba(30, 41, 59, 0.95) 100%);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 25px;
}

.nav-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.nav-menu a:hover {
    color: var(--text-primary);
    background: var(--hover-bg);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* 英雄区域 */
.hero {
    background: var(--gradient-primary);
    padding: 80px 20px;
    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,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.3;
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* 主内容区 */
.main-content {
    padding: 60px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* 分类卡片网格 */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 60px;
}

.category-card {
    background: var(--surface-color);
    border-radius: 12px;
    padding: 30px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(124, 58, 237, 0.15);
    border-color: var(--primary-color);
}

.category-card h2 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.category-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

.category-card .link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--secondary-color);
    font-weight: 500;
}

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

/* 文章列表 */
.article-list {
    margin-bottom: 60px;
}

.article-list h2 {
    font-size: 1.8rem;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.article-item {
    background: var(--surface-color);
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.article-item:hover {
    border-color: var(--primary-color);
    background: rgba(124, 58, 237, 0.05);
}

.article-item h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.article-item h3 a {
    color: var(--text-primary);
}

.article-item h3 a:hover {
    color: var(--primary-color);
}

.article-meta {
    display: flex;
    gap: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.article-excerpt {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 文章详情页 */
.article-detail {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

.article-detail h1 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    line-height: 1.4;
}

.article-detail .meta {
    display: flex;
    gap: 20px;
    color: var(--text-secondary);
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.article-detail .content {
    line-height: 1.9;
    font-size: 1.05rem;
}

.article-detail .content h2 {
    font-size: 1.6rem;
    margin: 35px 0 20px;
    color: var(--secondary-color);
}

.article-detail .content h3 {
    font-size: 1.3rem;
    margin: 25px 0 15px;
}

.article-detail .content p {
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.article-detail .content ul,
.article-detail .content ol {
    margin: 20px 0;
    padding-left: 25px;
    color: var(--text-secondary);
}

.article-detail .content li {
    margin-bottom: 10px;
}

.article-detail .content blockquote {
    border-left: 4px solid var(--primary-color);
    padding: 15px 20px;
    margin: 25px 0;
    background: var(--surface-color);
    border-radius: 0 8px 8px 0;
    color: var(--text-secondary);
}

/* 分类页面 */
.category-header {
    background: var(--surface-color);
    padding: 50px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.category-header h1 {
    font-size: 2.2rem;
    margin-bottom: 15px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.category-header .description {
    max-width: 700px;
    margin: 0 auto;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 面包屑导航 */
.breadcrumb {
    padding: 15px 20px;
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.breadcrumb-inner a {
    color: var(--text-secondary);
}

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

.breadcrumb-inner .separator {
    color: var(--border-color);
}

/* 外链区域 */
.external-links {
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 40px 20px;
    margin-top: 60px;
}

.external-links h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.links-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    max-width: 1200px;
    margin: 0 auto;
}

.links-grid a {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(124, 58, 237, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.links-grid a:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 页脚 */
.footer {
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 40px 20px;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

/* 标签 */
.tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(6, 182, 212, 0.15);
    color: var(--secondary-color);
    border-radius: 20px;
    font-size: 0.85rem;
    margin-right: 8px;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(124, 58, 237, 0.3);
}

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

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

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
    }

    .nav-menu {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 10px;
        padding-top: 15px;
    }

    .nav-menu.active {
        display: flex;
    }

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

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .category-grid {
        grid-template-columns: 1fr;
    }

    .article-detail h1 {
        font-size: 1.8rem;
    }

    .article-detail .meta {
        flex-direction: column;
        gap: 8px;
    }

    .links-grid {
        gap: 8px;
    }

    .links-grid a {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 50px 15px;
    }

    .hero h1 {
        font-size: 1.6rem;
    }

    .main-content {
        padding: 40px 15px;
    }

    .category-card {
        padding: 20px;
    }
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* 选择文本样式 */
::selection {
    background: var(--primary-color);
    color: white;
}