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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #7c3aed;
    --accent: #f59e0b;
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --radius: 12px;
    --transition: all 0.3s ease;
}

body.dark {
    --bg: #0f172a;
    --bg-card: #1e293b;
    --text: #f1f5f9;
    --text-light: #94a3b8;
    --border: #334155;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: var(--transition);
}

a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* 导航栏 */
.navbar {
    background: var(--bg-card);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

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

.nav-brand a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-menu {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-menu a {
    padding: 8px 16px;
    border-radius: var(--radius);
    color: var(--text);
    font-weight: 500;
    transition: var(--transition);
}

.nav-menu a:hover, .nav-menu a.active {
    background: var(--primary);
    color: white;
}

.theme-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
}

#themeToggle {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text);
    transition: var(--transition);
}

#themeToggle:hover {
    background: var(--primary);
    color: white;
}

.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: var(--transition);
}

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

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

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

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    font-weight: 800;
}

.hero p {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 30px;
    opacity: 0.9;
}

.hero-search {
    display: flex;
    max-width: 500px;
    margin: 0 auto;
    gap: 0;
}

.hero-search input {
    flex: 1;
    padding: 15px 20px;
    border: none;
    border-radius: var(--radius) 0 0 var(--radius);
    font-size: 1rem;
    outline: none;
}

.hero-search button {
    padding: 15px 25px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 0 var(--radius) var(--radius) 0;
    cursor: pointer;
    transition: var(--transition);
}

.hero-search button:hover { background: #d97706; }

/* 筛选区域 */
.filter-section {
    background: var(--bg-card);
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: center;
}

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

.filter-group label {
    font-weight: 500;
    color: var(--text-light);
    white-space: nowrap;
}

.filter-group select, .filter-group input {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}

.filter-group select:focus, .filter-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.filter-group input[type="number"] {
    width: 100px;
}

.btn-primary {
    background: var(--primary);
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

/* 评测卡片网格 */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    padding: 40px 0;
}

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

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

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

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

.review-card:hover .card-image img {
    transform: scale(1.1);
}

.card-category {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--primary);
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.card-content {
    padding: 20px;
}

.card-content h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--text);
}

.card-content p {
    color: var(--text-light);
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.rating {
    color: var(--accent);
    font-weight: 600;
}

.price {
    color: var(--primary);
    font-weight: 700;
    font-size: 1.1rem;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 15px;
}

.tag {
    background: var(--bg);
    color: var(--text-light);
    padding: 3px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
    border: 1px solid var(--border);
}

.btn-readmore {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--primary);
    font-weight: 500;
}

.btn-readmore:hover { gap: 10px; }

/* 热力图区域 */
.heatmap-section {
    background: var(--bg-card);
    padding: 60px 0;
    border-top: 1px solid var(--border);
}

.heatmap-section h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.heatmap-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg);
    border-radius: var(--radius);
    padding: 20px;
}

/* 统计区域 */
.stats-section {
    padding: 60px 0;
}

.stats-section h2 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

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

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.stat-card h3 {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 10px;
}

.stat-card p {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text);
}

/* 页脚 */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 60px 0 20px;
}

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

.footer-col h4 {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-col p, .footer-col a {
    color: var(--text-light);
    margin-bottom: 10px;
    display: block;
}

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

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

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text);
    transition: var(--transition);
}

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

.admin-link {
    margin-top: 10px;
    padding: 8px 15px;
    background: var(--bg);
    border-radius: 8px;
    display: inline-block;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    color: var(--text-light);
}

/* 响应式 */
@media (max-width: 768px) {
    .hamburger { display: flex; }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg-card);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active { display: flex; }
    
    .hero h1 { font-size: 1.8rem; }
    .hero p { font-size: 1rem; }
    
    .filter-bar { flex-direction: column; }
    
    .reviews-grid {
        grid-template-columns: 1fr;
    }
}

/* 管理后台样式 */
.admin-login-body {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.admin-login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.login-card h1 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--text);
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.error-msg {
    color: #ef4444;
    text-align: center;
    margin-bottom: 20px;
}

.back-link {
    display: block;
    text-align: center;
    margin-top: 20px;
    color: var(--text-light);
}

.admin-body {
    background: var(--bg);
}

.admin-nav {
    background: var(--bg-card);
    box-shadow: var(--shadow);
    padding: 0 20px;
}

.admin-container {
    display: flex;
    min-height: calc(100vh - 70px);
}

.admin-sidebar {
    width: 250px;
    background: var(--bg-card);
    padding: 30px 20px;
    border-right: 1px solid var(--border);
}

.admin-sidebar h3 {
    margin-bottom: 20px;
    color: var(--text);
}

.admin-sidebar ul {
    list-style: none;
}

.admin-sidebar li {
    margin-bottom: 10px;
}

.admin-sidebar a {
    display: block;
    padding: 10px 15px;
    border-radius: 8px;
    color: var(--text);
    transition: var(--transition);
}

.admin-sidebar a:hover {
    background: var(--bg);
    color: var(--primary);
}

.admin-main {
    flex: 1;
    padding: 30px;
}

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

.admin-main h2 {
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stats-cards .stat-card {
    padding: 20px;
}

.admin-form {
    background: var(--bg-card);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-top: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.reviews-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
}

.reviews-table th, .reviews-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.reviews-table th {
    background: var(--bg);
    font-weight: 600;
}

.btn-delete {
    color: #ef4444;
    padding: 5px 10px;
    border-radius: 5px;
    transition: var(--transition);
}

.btn-delete:hover {
    background: #fef2f2;
}

.alert {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.settings-card {
    background: var(--bg-card);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.settings-card p {
    margin-bottom: 10px;
}

@media (max-width: 768px) {
    .admin-container { flex-direction: column; }
    .admin-sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border); }
}