/* 全局变量 */
:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.8);
    --bg-card-hover: rgba(30, 41, 59, 0.9);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-cyan: #06b6d4;
    --accent-pink: #ec4899;
    --gradient-primary: linear-gradient(135deg, #3b82f6, #8b5cf6);
    --gradient-secondary: linear-gradient(135deg, #06b6d4, #3b82f6);
    --border-color: rgba(59, 130, 246, 0.2);
    --border-hover: rgba(59, 130, 246, 0.5);
    --glow-blue: 0 0 20px rgba(59, 130, 246, 0.3);
    --glow-purple: 0 0 20px rgba(139, 92, 246, 0.3);
}

/* 全局重置 */
* {
    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;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* 背景粒子效果 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(6, 182, 212, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

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

ul {
    list-style: none;
}

/* 导航栏 */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 14, 26, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.logo-icon {
    font-size: 24px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-domain {
    font-size: 12px;
    color: var(--text-muted);
}

.nav-links {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.nav-link {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: rgba(59, 130, 246, 0.1);
}

.nav-search {
    flex: 1;
    max-width: 400px;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 10px 40px 10px 16px;
    background: rgba(17, 24, 39, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: all 0.3s;
}

.search-input:focus {
    border-color: var(--accent-blue);
    box-shadow: var(--glow-blue);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-btn {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    padding: 4px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.btn-submit {
    padding: 8px 16px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-submit:hover {
    background: rgba(59, 130, 246, 0.2);
    border-color: var(--border-hover);
}

.btn-login {
    padding: 8px 16px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-login:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.btn-register {
    padding: 8px 20px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-register:hover {
    transform: translateY(-1px);
    box-shadow: var(--glow-blue);
}

/* 主内容 */
.main-content {
    position: relative;
    z-index: 1;
    min-height: calc(100vh - 64px - 300px);
}

/* 加载动画 */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    gap: 16px;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-container p {
    color: var(--text-muted);
    font-size: 14px;
}

/* Hero区域 */
.hero {
    text-align: center;
    padding: 80px 24px 60px;
    position: relative;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 13px;
    color: var(--accent-cyan);
    margin-bottom: 24px;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
}

.hero-title .gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
}

.hero-search {
    max-width: 600px;
    margin: 0 auto 48px;
    position: relative;
}

.hero-search input {
    width: 100%;
    padding: 16px 120px 16px 24px;
    background: rgba(17, 24, 39, 0.8);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    color: var(--text-primary);
    font-size: 16px;
    outline: none;
    transition: all 0.3s;
}

.hero-search input:focus {
    border-color: var(--accent-blue);
    box-shadow: var(--glow-blue);
}

.hero-search button {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    padding: 10px 28px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.hero-search button:hover {
    transform: translateY(-50%) scale(1.02);
    box-shadow: var(--glow-blue);
}

/* 统计数字 */
.stats {
    display: flex;
    justify-content: center;
    gap: 64px;
    margin-top: 48px;
}

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

.stat-number {
    font-size: 40px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* 区块标题 */
.section {
    max-width: 1400px;
    margin: 0 auto;
    padding: 48px 24px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-title h2 {
    font-size: 24px;
    font-weight: 700;
}

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

.section-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.section-more {
    color: var(--accent-blue);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.section-more:hover {
    color: var(--accent-cyan);
}

/* 工具卡片网格 */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s;
}

.tool-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--glow-blue);
}

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

.tool-header {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
}

.tool-logo {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--gradient-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
    overflow: hidden;
}

.tool-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.tool-info {
    flex: 1;
    min-width: 0;
}

.tool-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tool-category {
    font-size: 12px;
    color: var(--accent-cyan);
}

.tool-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.tool-rating {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    color: #fbbf24;
}

.tool-tags {
    display: flex;
    gap: 6px;
}

.tool-tag {
    padding: 2px 8px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 4px;
    font-size: 11px;
    color: var(--accent-blue);
}

/* 分类网格 */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
}

.category-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

.category-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.category-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.category-name {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
}

.category-count {
    font-size: 12px;
    color: var(--text-muted);
}

/* 文章列表 */
.articles-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    cursor: pointer;
    transition: all 0.3s;
}

.article-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.article-title {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-excerpt {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-muted);
}

.article-author {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Footer */
.footer {
    background: rgba(10, 14, 26, 0.9);
    border-top: 1px solid var(--border-color);
    padding: 48px 24px 24px;
    position: relative;
    z-index: 1;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 40px;
    margin-bottom: 32px;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
}

.footer-links-section {
    border-top: 1px solid var(--border-color);
    padding-top: 32px;
}

.footer-links-section h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.footer-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.footer-section h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: var(--accent-blue);
}

.friend-links {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 12px 16px;
}

.friend-links li {
    margin-bottom: 0 !important;
}

.friend-links li a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.3s;
    display: inline-block;
}

.friend-links li a:hover {
    color: var(--accent-blue);
}

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

/* 筛选栏 */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
    padding: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-label {
    font-size: 13px;
    color: var(--text-muted);
}

.filter-select {
    padding: 6px 12px;
    background: rgba(17, 24, 39, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
    cursor: pointer;
}

.filter-btn {
    padding: 6px 14px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s;
}

.filter-btn:hover,
.filter-btn.active {
    background: rgba(59, 130, 246, 0.2);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
}

.page-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.page-btn:hover,
.page-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
}

.page-ellipsis {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
}

/* 详情页 */
.detail-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px;
}

.detail-header {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
}

.detail-logo {
    width: 96px;
    height: 96px;
    border-radius: 20px;
    background: var(--gradient-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    flex-shrink: 0;
    overflow: hidden;
}

.detail-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.detail-info {
    flex: 1;
}

.detail-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.detail-category {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(6, 182, 212, 0.1);
    border-radius: 6px;
    font-size: 13px;
    color: var(--accent-cyan);
    margin-bottom: 12px;
}

.detail-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.detail-meta {
    display: flex;
    gap: 24px;
    margin-bottom: 20px;
}

.detail-meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-secondary);
}

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

.btn-primary {
    padding: 12px 32px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--glow-blue);
}

.btn-secondary {
    padding: 12px 24px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-secondary:hover {
    background: rgba(59, 130, 246, 0.2);
    border-color: var(--border-hover);
}

.detail-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
    margin-bottom: 32px;
}

.detail-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
}

.detail-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

/* 表单页面 */
.auth-page {
    max-width: 420px;
    margin: 64px auto;
    padding: 0 24px;
}

.auth-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
}

.auth-title {
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
}

.auth-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    text-align: center;
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(17, 24, 39, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: all 0.3s;
}

.form-input:focus {
    border-color: var(--accent-blue);
    box-shadow: var(--glow-blue);
}

.form-btn {
    width: 100%;
    padding: 14px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 8px;
}

.form-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--glow-blue);
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: var(--text-muted);
}

.auth-footer a {
    color: var(--accent-blue);
}

/* 响应式 */
@media (max-width: 1024px) {
    .nav-links {
        display: none;
    }
    
    .footer-top {
        grid-template-columns: 1fr 1fr;
    }
    
    .friend-links {
        grid-template-columns: repeat(5, 1fr);
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .stats {
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        gap: 12px;
        padding: 0 16px;
    }
    
    .nav-search {
        display: none;
    }
    
    .nav-actions .btn-submit {
        display: none;
    }
    
    .hero {
        padding: 48px 16px 40px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .section {
        padding: 32px 16px;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .articles-list {
        grid-template-columns: 1fr;
    }
    
    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
    
    .footer-section:first-child {
        grid-column: 1 / -1;
    }
    
    .footer-section h4 {
        font-size: 15px;
        margin-bottom: 12px;
    }
    
    .footer-section a {
        font-size: 13px;
        padding: 4px 0;
    }
    
    .friend-links {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .detail-header {
        flex-direction: column;
        padding: 24px;
    }
    
    .detail-logo {
        width: 72px;
        height: 72px;
        font-size: 36px;
    }
    
    .detail-title {
        font-size: 22px;
    }
    
    .detail-actions {
        flex-direction: column;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
    }
    
    .user-center,
    .admin-layout {
        flex-direction: column;
    }
    
    .user-sidebar,
    .admin-sidebar {
        width: 100%;
    }
    
    /* 移动端底部导航 */
    .mobile-bottom-nav {
        display: flex !important;
    }
    
    body {
        padding-bottom: 70px;
    }
    
    .footer {
        margin-bottom: 0;
    }
}

/* ========== 移动端底部导航 ========== */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: rgba(15, 20, 35, 0.98);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    z-index: 1000;
    padding: 0 8px;
    padding-bottom: env(safe-area-inset-bottom);
}

.mobile-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    text-decoration: none;
    color: var(--text-muted);
    transition: color 0.3s;
    padding: 6px 0;
}

.mobile-nav-item.active {
    color: var(--accent-blue);
}

.mobile-nav-icon {
    font-size: 20px;
    line-height: 1;
}

.mobile-nav-label {
    font-size: 11px;
    line-height: 1;
}

/* 移动端导航栏优化 */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 12px;
    }
    
    .nav-search {
        display: none !important;
    }
    
    .nav-actions .btn-submit {
        display: none !important;
    }
    
    .nav-links {
        display: none !important;
    }
    
    .hero {
        padding: 32px 16px 28px !important;
    }
    
    .hero-search {
        flex-direction: column;
        gap: 12px;
    }
    
    .hero-search input {
        width: 100%;
    }
    
    .hero-search button {
        width: 100%;
    }
    
    .stats {
        flex-direction: row !important;
        gap: 16px !important;
        flex-wrap: wrap;
    }
    
    .stat-item {
        flex: 1;
        min-width: 80px;
    }
    
    .stat-number {
        font-size: 24px !important;
    }
    
    .filter-bar {
        flex-direction: column;
        gap: 8px;
    }
    
    .filter-bar select,
    .filter-bar button {
        width: 100%;
    }
    
    .tools-grid {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 12px !important;
    }
    
    .tool-card {
        padding: 16px !important;
    }
    
    .tool-logo {
        width: 48px !important;
        height: 48px !important;
        font-size: 24px !important;
    }
    
    .tool-name {
        font-size: 14px !important;
    }
    
    .tool-desc {
        font-size: 12px !important;
        line-height: 1.4 !important;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    
    .categories-grid {
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 12px !important;
    }
    
    .category-card {
        padding: 16px 8px !important;
    }
    
    .category-icon {
        font-size: 28px !important;
    }
    
    .category-name {
        font-size: 13px !important;
    }
    
    .category-count {
        font-size: 11px !important;
    }
    
    .articles-list {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }
    
    .article-card {
        padding: 16px !important;
    }
    
    .article-title {
        font-size: 16px !important;
    }
    
    .article-excerpt {
        font-size: 13px !important;
    }
    
    .detail-content {
        padding: 20px 16px !important;
        font-size: 14px !important;
        line-height: 1.8 !important;
    }
    
    .comment-item {
        padding: 16px 0 !important;
    }
    
    .auth-card {
        margin: 24px 16px !important;
        padding: 24px !important;
    }
    
    .form-input,
    .form-textarea {
        font-size: 14px !important;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .section-more {
        align-self: flex-end;
    }
}

/* ========== 按钮通用 ========== */
.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
    border-radius: 6px;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
}

/* ========== 评论系统 ========== */
.comment-form {
    margin-bottom: 24px;
}

.comment-textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(17, 24, 39, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    resize: vertical;
    min-height: 80px;
    transition: all 0.3s;
}

.comment-textarea:focus {
    border-color: var(--accent-blue);
    box-shadow: var(--glow-blue);
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.comment-item {
    padding: 16px;
    background: rgba(17, 24, 39, 0.4);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.comment-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.comment-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--gradient-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
    overflow: hidden;
}

.comment-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.comment-avatar-default {
    background: var(--gradient-primary);
}

.comment-user-info {
    display: flex;
    flex-direction: column;
}

.comment-username {
    font-weight: 600;
    font-size: 14px;
}

.comment-time {
    font-size: 12px;
    color: var(--text-muted);
}

.comment-content {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

.comment-actions {
    display: flex;
    gap: 16px;
}

.comment-action-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 13px;
    cursor: pointer;
    transition: color 0.3s;
}

.comment-action-btn:hover {
    color: var(--accent-blue);
}

.comment-replies {
    margin-top: 16px;
    margin-left: 52px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.reply-form-container {
    margin-top: 12px;
    margin-left: 52px;
}

.reply-textarea {
    width: 100%;
    padding: 10px 12px;
    background: rgba(17, 24, 39, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
    resize: vertical;
    min-height: 60px;
}

.reply-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 8px;
}

/* ========== 用户中心 ========== */
.user-center {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px;
    display: flex;
    gap: 24px;
}

.user-sidebar {
    width: 240px;
    flex-shrink: 0;
}

.user-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    margin-bottom: 16px;
}

.user-avatar-large {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 700;
    color: white;
    margin: 0 auto 12px;
    overflow: hidden;
}

.user-avatar-large img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-card h3 {
    font-size: 18px;
    margin-bottom: 4px;
}

.vip-badge {
    display: inline-block;
    margin-top: 8px;
    padding: 4px 12px;
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    border-radius: 20px;
    font-size: 12px;
    color: #1a1a1a;
    font-weight: 600;
}

.user-nav {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.user-nav-item {
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.user-nav-item:hover,
.user-nav-item.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--text-primary);
}

.user-content {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    min-height: 500px;
}

.profile-form {
    max-width: 500px;
}

.ratings-list,
.submissions-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.rating-item,
.submission-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    background: rgba(17, 24, 39, 0.4);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s;
}

.rating-item:hover,
.submission-item:hover {
    background: rgba(59, 130, 246, 0.1);
}

.status-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.status-pending { background: rgba(251, 191, 36, 0.2); color: #fbbf24; }
.status-approved { background: rgba(34, 197, 94, 0.2); color: #22c55e; }
.status-rejected { background: rgba(239, 68, 68, 0.2); color: #ef4444; }
.status-active { background: rgba(34, 197, 94, 0.2); color: #22c55e; }
.status-disabled { background: rgba(239, 68, 68, 0.2); color: #ef4444; }

/* ========== 后台管理 ========== */
.admin-layout {
    max-width: 1400px;
    margin: 0 auto;
    padding: 32px 24px;
    display: flex;
    gap: 24px;
}

.admin-sidebar {
    width: 220px;
    flex-shrink: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 8px;
}

.admin-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.admin-nav-item {
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.admin-nav-item:hover,
.admin-nav-item.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--text-primary);
}

.admin-content {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    min-height: 600px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}

.stat-card {
    background: rgba(17, 24, 39, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
}

.stat-card-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

.stat-card-number {
    font-size: 28px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-card-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
}

.admin-table-container {
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.admin-table th,
.admin-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.admin-table th {
    background: rgba(59, 130, 246, 0.1);
    color: var(--text-primary);
    font-weight: 600;
}

.admin-table tr:hover {
    background: rgba(59, 130, 246, 0.05);
}

.admin-table a {
    color: var(--accent-blue);
}

.settings-tabs {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0;
}

.settings-tab {
    padding: 10px 20px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
}

.settings-tab:hover,
.settings-tab.active {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
}

.settings-form {
    margin-top: 24px;
}

/* ========== 树洞 ========== */
.treehole-form {
    margin-bottom: 24px;
}

.treehole-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.treehole-item {
    padding: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s;
}

.treehole-item:hover {
    border-color: var(--border-hover);
}

.treehole-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.treehole-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--gradient-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    color: white;
}

.treehole-content {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

.treehole-actions {
    display: flex;
    gap: 16px;
    font-size: 13px;
    color: var(--text-muted);
}

/* ========== 提交工具表单 ========== */
.submit-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
}

/* ========== 标签页按钮 ========== */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
}

.tab-btn {
    flex: 1;
    padding: 10px;
    background: rgba(17, 24, 39, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.tab-btn:hover,
.tab-btn.active {
    background: rgba(59, 130, 246, 0.2);
    border-color: var(--accent-blue);
    color: var(--text-primary);
}