* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}

:root {
    --bg: #f0f2f5;
    --card-bg: #ffffff;
    --text: #1a1a2e;
    --primary: #2ecc71;
    --primary-dark: #27ae60;
    --shadow: 0 8px 30px rgba(0,0,0,0.12);
    --radius: 16px;
    --nav-bg: #ffffff;
    --footer-bg: #1a1a2e;
    --footer-text: #ccc;
}

body.dark {
    --bg: #121212;
    --card-bg: #1e1e1e;
    --text: #e0e0e0;
    --shadow: 0 8px 30px rgba(0,0,0,0.5);
    --nav-bg: #1e1e1e;
    --footer-bg: #0a0a0a;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 导航栏 */
.navbar {
    background: var(--nav-bg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0 20px;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.nav-links a {
    margin: 0 12px;
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    height: 2px;
    background: var(--primary);
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    transition: width 0.3s;
}

.nav-links a:hover::after {
    width: 100%;
}

.theme-toggle, .hamburger {
    background: none;
    border: none;
    font-size: 1.3rem;
    cursor: pointer;
    color: var(--text);
    padding: 8px;
}

.hamburger {
    display: none;
}

/* 搜索 */
.search-section {
    padding: 40px 20px 20px;
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

.search-container {
    display: flex;
    background: var(--card-bg);
    border-radius: 50px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.search-container input {
    flex: 1;
    border: none;
    padding: 14px 20px;
    font-size: 1rem;
    background: transparent;
    color: var(--text);
    outline: none;
}

.search-container button {
    background: var(--primary);
    border: none;
    padding: 0 24px;
    color: #fff;
    cursor: pointer;
    font-size: 1.2rem;
}

.search-container button:hover {
    background: var(--primary-dark);
}

/* 分类导航 */
.category-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    padding: 10px 20px 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.category-btn {
    background: var(--card-bg);
    border: none;
    padding: 10px 20px;
    border-radius: 30px;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    transition: all 0.3s;
}

.category-btn.active, .category-btn:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(46,204,113,0.4);
}

/* 卡片网格 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    padding: 0 20px 60px;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 20px;
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

.card-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 12px;
}

.card-body h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.card-body p {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 12px;
    line-height: 1.5;
}

.card-rating {
    margin-bottom: 14px;
}

.stars {
    color: #f1c40f;
    font-size: 1.1rem;
    letter-spacing: 2px;
}

.rating-value {
    margin-left: 6px;
    font-weight: 600;
    color: var(--text);
}

.card-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.btn-visit {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    color: #fff;
    padding: 10px 22px;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-visit:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(46,204,113,0.5);
}

.btn-fav {
    background: transparent;
    border: 2px solid #e74c3c;
    color: #e74c3c;
    padding: 8px 16px;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-fav.active {
    background: #e74c3c;
    color: #fff;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 30px;
    max-width: 420px;
    width: 90%;
    box-shadow: var(--shadow);
    text-align: center;
}

.close {
    float: right;
    font-size: 1.8rem;
    cursor: pointer;
    color: #999;
}

.modal-content h2 {
    margin-bottom: 16px;
    color: var(--primary);
}

.modal-content .warning {
    color: #e74c3c;
    font-weight: 600;
    margin: 16px 0;
}

.btn-confirm {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-confirm:hover {
    background: var(--primary-dark);
}

/* 页脚 */
.footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    text-align: center;
    padding: 30px 20px;
    margin-top: auto;
}

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

/* 管理后台 */
.admin-container {
    max-width: 800px;
    margin: 40px auto;
    padding: 0 20px;
}

.admin-form {
    background: var(--card-bg);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.admin-form input {
    width: 100%;
    padding: 12px;
    margin: 8px 0;
    border: 1px solid #ddd;
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
}

.admin-form button {
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    margin-top: 8px;
}

.admin-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.admin-item {
    background: var(--card-bg);
    padding: 12px 16px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-item button {
    background: #e74c3c;
    color: #fff;
    border: none;
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
}

.error { color: #e74c3c; }
.success { color: var(--primary); }

/* 响应式 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        background: var(--nav-bg);
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        padding: 20px;
        box-shadow: var(--shadow);
    }
    .nav-links.show {
        display: flex;
    }
    .hamburger {
        display: block;
    }
    .card-grid {
        grid-template-columns: 1fr;
    }
}