/**
 * SinPark CMS - 前台样式设计系统
 * 现代化深色主题设计
 */

/* ===== CSS 变量定义 ===== */
:root {
    /* 主色调 - 紫蓝渐变 */
    --primary: 250 95% 60%;
    --primary-foreground: 0 0% 100%;
    --primary-glow: 250 95% 70%;

    /* 次要色调 */
    --secondary: 210 40% 96%;
    --secondary-foreground: 222.2 47.4% 11.2%;

    /* 背景色 */
    --background: 222 47% 6%;
    --background-soft: 222 47% 8%;
    --background-card: 222 47% 11%;
    --foreground: 210 40% 98%;

    /* 文字颜色 */
    --text-primary: 0 0% 100%;
    --text-secondary: 215 20% 65%;
    --text-muted: 215 20% 45%;

    /* 边框和阴影 */
    --border: 217 33% 17%;
    --border-subtle: 217 33% 20%;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5), 0 4px 6px -4px rgb(0 0 0 / 0.5);
    --shadow-glow: 0 0 40px hsl(var(--primary) / 0.3);

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, hsl(250 95% 60%), hsl(280 95% 60%));
    --gradient-subtle: linear-gradient(180deg, hsl(222 47% 8%), hsl(222 47% 6%));
    --gradient-card: linear-gradient(145deg, hsl(222 47% 13%), hsl(222 47% 9%));

    /* 圆角 */
    --radius-sm: 6px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* 过渡 */
    --transition-fast: 150ms ease;
    --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    /* 间距 */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
}

/* ===== 基础重置 ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: hsl(var(--text-primary));
    background: hsl(var(--background));
    background-image: var(--gradient-subtle);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== 布局容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-5);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-4);
    }
}

/* ===== 头部导航 ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: hsl(var(--background) / 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid hsl(var(--border));
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) 0;
    gap: var(--space-4);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-link {
    position: relative;
    padding: var(--space-2) var(--space-4);
    color: hsl(var(--text-secondary));
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: hsl(var(--text-primary));
    background: hsl(var(--border));
}

.nav-link.active {
    color: hsl(var(--primary-foreground));
    background: var(--gradient-primary);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: hsl(var(--text-primary));
    cursor: pointer;
    padding: var(--space-2);
}

@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
    }

    .menu-toggle {
        display: block;
    }

    .main-nav {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: var(--space-2);
        padding-top: var(--space-4);
        border-top: 1px solid hsl(var(--border));
        margin-top: var(--space-4);
    }

    .main-nav.open {
        display: flex;
    }

    .nav-link {
        width: 100%;
        text-align: center;
        padding: var(--space-3);
    }
}

/* ===== 主内容区 ===== */
.main-content {
    padding: var(--space-12) 0;
    min-height: calc(100vh - 200px);
}

@media (max-width: 768px) {
    .main-content {
        padding: var(--space-8) 0;
    }
}

/* ===== 页面标题区 ===== */
.page-header {
    text-align: center;
    margin-bottom: var(--space-12);
    padding: var(--space-10) 0;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-4);
    letter-spacing: -0.02em;
}

.page-desc {
    color: hsl(var(--text-secondary));
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

@media (max-width: 768px) {
    .page-title {
        font-size: 1.75rem;
    }

    .page-desc {
        font-size: 1rem;
    }
}

/* ===== 文章列表 ===== */
.article-list {
    display: grid;
    gap: var(--space-8);
}

/* ===== 文章卡片 ===== */
.article-card {
    display: block;
    background: var(--gradient-card);
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
    position: relative;
}

.article-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, hsl(var(--primary) / 0.1), transparent);
    opacity: 0;
    transition: opacity var(--transition);
    pointer-events: none;
}

.article-card:hover {
    transform: translateY(-4px);
    border-color: hsl(var(--border-subtle));
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.article-card:hover::before {
    opacity: 1;
}

.article-card-cover {
    position: relative;
    overflow: hidden;
}

.article-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.article-card:hover .article-card-cover img {
    transform: scale(1.05);
}

.article-card-body {
    padding: var(--space-6);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.article-card-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--space-3);
    line-height: 1.4;
}

.article-card-title a {
    color: hsl(var(--text-primary));
    text-decoration: none;
    transition: color var(--transition-fast);
}

.article-card-title a:hover {
    color: hsl(var(--primary-glow));
}

.article-card-meta {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    color: hsl(var(--text-muted));
    font-size: 0.85rem;
    margin-bottom: var(--space-4);
}

.article-card-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.article-card-meta svg {
    width: 14px;
    height: 14px;
}

.article-card-summary {
    color: hsl(var(--text-secondary));
    line-height: 1.7;
    margin-bottom: var(--space-5);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: hsl(var(--primary-glow));
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: gap var(--transition-fast);
}

.read-more:hover {
    gap: var(--space-3);
}

.read-more svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.read-more:hover svg {
    transform: translateX(4px);
}

@media (max-width: 768px) {
    .article-card-body {
        padding: var(--space-5);
    }

    .article-card-title {
        font-size: 1.2rem;
    }
}

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

.article-detail-header {
    text-align: center;
    margin-bottom: var(--space-10);
}

.article-detail-title {
    font-size: 2.25rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: var(--space-6);
    letter-spacing: -0.02em;
}

.article-detail-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-6);
    color: hsl(var(--text-secondary));
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.article-detail-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.article-detail-cover {
    width: 100%;
    max-height: 450px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-10);
    box-shadow: var(--shadow-lg);
}

.article-detail-body {
    font-size: 1.1rem;
    line-height: 1.8;
    color: hsl(var(--text-secondary));
}

.article-detail-body h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: hsl(var(--text-primary));
    margin: var(--space-10) 0 var(--space-5);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid hsl(var(--border));
}

.article-detail-body h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: hsl(var(--text-primary));
    margin: var(--space-8) 0 var(--space-4);
}

.article-detail-body p {
    margin-bottom: var(--space-5);
}

.article-detail-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    margin: var(--space-6) 0;
    box-shadow: var(--shadow);
}

.article-detail-body a {
    color: hsl(var(--primary-glow));
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.article-detail-body a:hover {
    border-color: hsl(var(--primary-glow));
}

.article-detail-body code {
    background: hsl(var(--background-card));
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-family: 'SF Mono', Monaco, monospace;
    font-size: 0.9em;
    color: hsl(var(--primary-glow));
}

.article-detail-body pre {
    background: hsl(var(--background-card));
    padding: var(--space-5);
    border-radius: var(--radius);
    overflow-x: auto;
    margin: var(--space-5) 0;
    border: 1px solid hsl(var(--border));
}

.article-detail-body pre code {
    background: none;
    padding: 0;
    color: hsl(var(--text-secondary));
}

.article-detail-body blockquote {
    border-left: 4px solid hsl(var(--primary));
    padding-left: var(--space-5);
    margin: var(--space-6) 0;
    color: hsl(var(--text-secondary));
    font-style: italic;
}

.article-detail-body ul,
.article-detail-body ol {
    margin: var(--space-5) 0;
    padding-left: var(--space-6);
}

.article-detail-body li {
    margin-bottom: var(--space-2);
}

.article-detail-body table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-5) 0;
    font-size: 0.95rem;
}

.article-detail-body th,
.article-detail-body td {
    padding: var(--space-3) var(--space-4);
    border: 1px solid hsl(var(--border));
    text-align: left;
}

.article-detail-body th {
    background: hsl(var(--background-card));
    font-weight: 600;
    color: hsl(var(--text-primary));
}

@media (max-width: 768px) {
    .article-detail-title {
        font-size: 1.6rem;
    }

    .article-detail-meta {
        gap: var(--space-4);
        font-size: 0.85rem;
    }

    .article-detail-body {
        font-size: 1rem;
    }

    .article-detail-body h2 {
        font-size: 1.4rem;
    }

    .article-detail-body h3 {
        font-size: 1.2rem;
    }
}

/* ===== 返回链接 ===== */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    color: hsl(var(--text-secondary));
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: var(--space-6);
    transition: color var(--transition-fast);
}

.back-link:hover {
    color: hsl(var(--text-primary));
}

.back-link svg {
    width: 16px;
    height: 16px;
    transition: transform var(--transition-fast);
}

.back-link:hover svg {
    transform: translateX(-4px);
}

/* ===== 相关文章 ===== */
.related-section {
    margin-top: var(--space-16);
    padding-top: var(--space-10);
    border-top: 1px solid hsl(var(--border));
}

.related-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-6);
    color: hsl(var(--text-primary));
}

.related-list {
    display: grid;
    gap: var(--space-4);
}

.related-item {
    padding: var(--space-5);
    background: hsl(var(--background-card));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    transition: all var(--transition-fast);
}

.related-item:hover {
    border-color: hsl(var(--border-subtle));
    transform: translateX(4px);
}

.related-item a {
    color: hsl(var(--text-primary));
    text-decoration: none;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.related-item a::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--gradient-primary);
    border-radius: 50%;
    flex-shrink: 0;
}

/* ===== 分页 ===== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-2);
    margin-top: var(--space-12);
    flex-wrap: wrap;
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 44px;
    padding: 0 var(--space-4);
    background: hsl(var(--background-card));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    color: hsl(var(--text-secondary));
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.pagination a:hover {
    background: hsl(var(--border));
    color: hsl(var(--text-primary));
    border-color: hsl(var(--border-subtle));
}

.pagination .current {
    background: var(--gradient-primary);
    border-color: transparent;
    color: hsl(var(--primary-foreground));
}

.pagination .disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ===== 空状态 ===== */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-6);
    background: hsl(var(--background-card));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius-lg);
}

.empty-state-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-6);
    color: hsl(var(--text-muted));
}

.empty-state-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: hsl(var(--text-primary));
    margin-bottom: var(--space-3);
}

.empty-state-desc {
    color: hsl(var(--text-secondary));
}

/* ===== 页脚 ===== */
.site-footer {
    background: hsl(var(--background-soft));
    border-top: 1px solid hsl(var(--border));
    padding: var(--space-10) 0;
    margin-top: var(--space-16);
}

.footer-content {
    text-align: center;
}

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

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--space-6);
    margin-bottom: var(--space-4);
}

.footer-links a {
    color: hsl(var(--text-secondary));
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

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

.icp-link {
    display: inline-block;
    margin-top: var(--space-3);
    color: hsl(var(--text-muted));
    text-decoration: none;
    font-size: 0.85rem;
    transition: color var(--transition-fast);
}

.icp-link:hover {
    color: hsl(var(--text-secondary));
}

/* ===== 文章分享 ===== */
.article-share-section {
    margin-top: var(--space-12);
    padding: var(--space-8);
    background: hsl(var(--background-card));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius-lg);
}

.share-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 1.2rem;
    font-weight: 600;
    color: hsl(var(--text-primary));
    margin-bottom: var(--space-6);
}

.share-title svg {
    width: 24px;
    height: 24px;
    color: hsl(var(--primary-glow));
}

.share-content {
    display: grid;
    gap: var(--space-6);
}

.share-summary h4,
.share-short-link h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: hsl(var(--text-secondary));
    margin-bottom: var(--space-3);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.summary-text {
    color: hsl(var(--text-secondary));
    line-height: 1.7;
    font-size: 0.95rem;
    padding: var(--space-4);
    background: hsl(var(--background-soft));
    border-radius: var(--radius);
    border-left: 4px solid hsl(var(--primary));
}

.short-link-box {
    display: flex;
    gap: var(--space-3);
}

.short-link-input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    background: hsl(var(--background-soft));
    border: 1px solid hsl(var(--border));
    border-radius: var(--radius);
    color: hsl(var(--text-primary));
    font-size: 0.95rem;
    font-family: monospace;
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius);
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.copy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px hsl(var(--primary) / 0.4);
}

.copy-btn svg {
    width: 16px;
    height: 16px;
}

.copy-success {
    display: none;
    color: #10b981;
    font-size: 0.85rem;
    margin-top: var(--space-2);
}

.share-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
    border: none;
    cursor: pointer;
}

.share-btn svg {
    width: 18px;
    height: 18px;
}

.share-btn.weibo {
    background: #e6162d;
    color: white;
}

.share-btn.weibo:hover {
    background: #c41227;
}

.share-btn.twitter {
    background: #1da1f2;
    color: white;
}

.share-btn.twitter:hover {
    background: #0d8ecf;
}

.share-btn.facebook {
    background: #4267b2;
    color: white;
}

.share-btn.facebook:hover {
    background: #365899;
}

.share-btn.wechat {
    background: #07c160;
    color: white;
}

.share-btn.wechat:hover {
    background: #06ad56;
}

@media (max-width: 768px) {
    .article-share-section {
        padding: var(--space-5);
    }

    .short-link-box {
        flex-direction: column;
    }

    .copy-btn {
        width: 100%;
        justify-content: center;
    }

    .share-buttons {
        justify-content: center;
    }

    .share-btn {
        flex: 1;
        min-width: 100px;
        justify-content: center;
    }
}

/* ===== 分类标签 ===== */
.category-tag {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    background: hsl(var(--primary) / 0.15);
    color: hsl(var(--primary-glow));
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.category-tag:hover {
    background: hsl(var(--primary) / 0.25);
}

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

.animate-fade-in {
    animation: fadeIn 0.6s ease-out forwards;
}

/* ===== AI 横幅 ===== */
.ai-banner {
    background: var(--gradient-primary);
    color: white;
    padding: 12px 0;
    position: relative;
    z-index: 1000;
}

.ai-banner-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 14px;
}

.ai-banner-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
}

.ai-banner-icon svg {
    width: 20px;
    height: 20px;
}

.ai-banner-text {
    text-align: center;
}

.ai-banner-close {
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.ai-banner-close:hover {
    background: rgba(255, 255, 255, 0.3);
}

.ai-banner-close svg {
    width: 16px;
    height: 16px;
}

@media (max-width: 768px) {
    .ai-banner-content {
        font-size: 12px;
        padding: 0 50px 0 20px;
    }

    .ai-banner-close {
        right: 15px;
    }
}

/* ===== 安全状态 ===== */
.security-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: hsl(var(--background-card));
    border: 1px solid hsl(var(--border));
    border-radius: 20px;
    font-size: 12px;
    color: hsl(var(--text-secondary));
}

.security-status[data-level="high"] {
    border-color: #10b981;
    color: #10b981;
}

.security-status[data-level="medium"] {
    border-color: #f59e0b;
    color: #f59e0b;
}

/* ===== 工具类 ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}