:root {
    --primary: #ff4757;
    --primary-dark: #c0392b;
    --secondary: #ffa502;
    --bg: #ffffff;
    --bg-secondary: #f8f9fa;
    --text: #2f3542;
    --text-secondary: #636e72;
    --border: #dfe6e9;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: 0.3s ease;
    --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

[data-theme="dark"] {
    --bg: #1a1a2e;
    --bg-secondary: #16213e;
    --text: #ecf0f1;
    --text-secondary: #bdc3c7;
    --border: #2d3436;
    --shadow: 0 4px 20px rgba(0,0,0,0.3);
    --primary: #ff6b81;
    --primary-dark: #ff4757;
}

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

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: background var(--transition), color var(--transition);
}

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

/* 导航 */
.header {
    background: var(--bg);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    height: 70px;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.brand-icon { font-size: 1.8rem; }

.nav-links {
    display: flex;
    list-style: none;
    gap: 20px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-links a:hover, .nav-links a.active {
    background: var(--primary);
    color: #fff;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text);
    border-radius: 3px;
    transition: all var(--transition);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    font-size: 0.95rem;
}

.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 4px 15px rgba(255,71,87,0.3); }
.btn-outline { background: transparent; border: 2px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-sm { padding: 6px 14px; font-size: 0.85rem; }
.btn-lg { padding: 14px 32px; font-size: 1.1rem; }
.btn-block { width: 100%; justify-content: center; }
.btn-icon { background: none; border: none; font-size: 1.3rem; color: var(--text); cursor: pointer; padding: 8px; border-radius: 50%; transition: all var(--transition); }
.btn-icon:hover { background: var(--bg-secondary); }
.btn-danger { background: #e74c3c; color: #fff; }
.btn-danger:hover { background: #c0392b; }

/* Hero */
.hero {
    text-align: center;
    padding: 80px 20px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="rgba(255,255,255,0.05)"/></svg>') repeat;
    opacity: 0.1;
}

.hero-content { position: relative; z-index: 1; }

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    font-weight: 800;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 40px;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    display: block;
}

.stat-label { font-size: 1rem; opacity: 0.85; }

.hero-actions { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }

.hero-actions .btn-outline { border-color: #fff; color: #fff; }
.hero-actions .btn-outline:hover { background: #fff; color: var(--primary); }

/* 卡片网格 */
.section-title {
    font-size: 2rem;
    margin: 60px 0 30px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.card {
    background: var(--bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: all var(--transition);
    border: 1px solid var(--border);
}

.card:hover { transform: translateY(-8px); box-shadow: 0 12px 40px rgba(0,0,0,0.12); }

.card-image {
    position: relative;
    overflow: hidden;
    height: 200px;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

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

.status-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-badge.online { background: #2ed573; color: #fff; }
.status-badge.offline { background: #a4b0be; color: #fff; }

.card-body { padding: 20px; }

.card-body h3 { font-size: 1.2rem; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }

.age { color: var(--primary); font-weight: 600; font-size: 0.9rem; }

.location { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 8px; }

.bio { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }

.tag {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    border: 1px solid var(--border);
}

.card-actions { display: flex; gap: 10px; }

/* 特色卡片 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.feature-card {
    text-align: center;
    padding: 40px 20px;
    background: var(--bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: all var(--transition);
    border: 1px solid var(--border);
}

.feature-card:hover { transform: translateY(-5px); }

.feature-icon { font-size: 3rem; color: var(--primary); margin-bottom: 20px; }

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

.feature-card p { color: var(--text-secondary); font-size: 0.95rem; }

/* 热力图 */
.heatmap {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(40px, 1fr));
    gap: 4px;
    margin-bottom: 60px;
}

.heatmap-cell {
    aspect-ratio: 1;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.heatmap-cell:hover { transform: scale(1.1); }

/* 页脚 */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 20px 20px;
    margin-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 { margin-bottom: 20px; color: var(--primary); font-size: 1.1rem; }

.footer-section ul { list-style: none; }

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

.footer-section a { text-decoration: none; color: var(--text-secondary); transition: color var(--transition); }

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

.social-links { display: flex; gap: 15px; margin-top: 20px; }

.social-links a { font-size: 1.5rem; color: var(--text-secondary); transition: all var(--transition); }

.social-links a:hover { color: var(--primary); transform: translateY(-3px); }

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-bottom a { color: var(--primary); text-decoration: none; }

/* 表单 */
.login-form {
    max-width: 400px;
    margin: 80px auto;
    padding: 40px;
    background: var(--bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.login-form h2 { text-align: center; margin-bottom: 30px; color: var(--primary); }

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

.form-group label { display: block; margin-bottom: 8px; font-weight: 500; color: var(--text); }

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    background: var(--bg);
    color: var(--text);
    transition: border-color var(--transition);
}

.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

/* 管理后台 */
.admin-main { min-height: 80vh; padding: 40px 0; }

.admin-dashboard h1 { margin-bottom: 30px; font-size: 2rem; display: flex; align-items: center; gap: 10px; }

.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.stat-card {
    text-align: center;
    padding: 30px;
    background: var(--bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.stat-card i { font-size: 2.5rem; color: var(--primary); margin-bottom: 10px; }

.stat-card span { font-size: 2rem; font-weight: 800; display: block; color: var(--text); }

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

.admin-section { margin-bottom: 40px; }

.admin-section h2 { margin-bottom: 20px; display: flex; align-items: center; gap: 10px; }

.ai-result {
    margin-top: 20px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--primary);
}

.table-wrapper { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

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

th { background: var(--primary); color: #fff; font-weight: 600; }

tr:hover { background: var(--bg-secondary); }

/* 内页通用 */
.page-header {
    text-align: center;
    padding: 60px 20px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
}

.page-header h1 { font-size: 2.5rem; margin-bottom: 10px; }

.page-content { padding: 40px 0; min-height: 60vh; }

/* 搜索页 */
.search-filters {
    background: var(--bg);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    border: 1px solid var(--border);
}

.filter-row { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 20px; }

.filter-group { flex: 1; min-width: 150px; }

.filter-group label { display: block; margin-bottom: 6px; font-weight: 500; }

.filter-group input, .filter-group select {
    width: 100%;
    padding: 10px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text);
}

/* 主题模板页 */
.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin: 40px 0;
}

.template-card {
    text-align: center;
    padding: 30px 20px;
    background: var(--bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: all var(--transition);
    border: 3px solid transparent;
}

.template-card:hover { border-color: var(--primary); transform: scale(1.02); }

.template-card i { font-size: 3rem; color: var(--primary); margin-bottom: 15px; }

.template-card.active { border-color: var(--primary); background: var(--bg-secondary); }

/* 分享按钮 */
.share-buttons { display: flex; gap: 10px; flex-wrap: wrap; margin: 20px 0; }

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    color: #fff;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
}

.share-btn:hover { transform: translateY(-2px); opacity: 0.9; }
.share-btn.weixin { background: #07c160; }
.share-btn.weibo { background: #e6162d; }
.share-btn.qq { background: #12b7f5; }
.share-btn.copy { background: var(--text-secondary); }

/* 响应式 */
@media (max-width: 768px) {
    .hamburger { display: flex; }

    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
        border-bottom: 2px solid var(--border);
    }

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

    .nav-actions { display: none; }

    .hero h1 { font-size: 1.8rem; }
    .hero-stats { gap: 30px; flex-wrap: wrap; }
    .stat-number { font-size: 1.8rem; }

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

    .filter-row { flex-direction: column; }
    .filter-group { min-width: 100%; }

    .footer-content { grid-template-columns: 1fr; }
}