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

:root {
    --primary: #ff6b6b;
    --primary-dark: #ee5a24;
    --secondary: #2ed573;
    --accent: #ffa502;
    --bg: #ffffff;
    --bg-secondary: #f8f9fa;
    --text: #2d3436;
    --text-light: #636e72;
    --card-bg: #ffffff;
    --border: #dfe6e9;
    --shadow: 0 4px 15px rgba(0,0,0,0.1);
    --shadow-hover: 0 8px 25px rgba(0,0,0,0.15);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --bg: #1a1a2e;
    --bg-secondary: #16213e;
    --text: #f0f0f0;
    --text-light: #b0b0b0;
    --card-bg: #1e2a3a;
    --border: #2d3a4a;
    --shadow: 0 4px 15px rgba(0,0,0,0.3);
    --shadow-hover: 0 8px 25px rgba(0,0,0,0.4);
}

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

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

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

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.nav-link {
    color: var(--text);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-weight: 500;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-icon {
    background: none;
    border: 2px 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);
}

.btn-icon:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

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

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

/* Hero区域 */
.hero {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    padding: 80px 20px;
    text-align: center;
    color: white;
    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: heroGlow 10s ease-in-out infinite;
}

@keyframes heroGlow {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(20%, 20%); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 15px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.search-bar {
    display: flex;
    max-width: 600px;
    margin: 0 auto 20px;
    background: white;
    border-radius: 50px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.search-bar i {
    padding: 15px 20px;
    color: #999;
}

.search-bar input {
    flex: 1;
    border: none;
    padding: 15px;
    font-size: 1rem;
    outline: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    padding: 15px 30px;
    cursor: pointer;
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition);
}

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

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
}

.filter-tag {
    background: rgba(255,255,255,0.2);
    padding: 8px 20px;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    backdrop-filter: blur(5px);
}

.filter-tag:hover, .filter-tag.active {
    background: white;
    color: var(--primary);
}

.filter-extra {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 20px;
    flex-wrap: wrap;
}

.filter-select {
    padding: 10px 20px;
    border-radius: 50px;
    border: none;
    background: rgba(255,255,255,0.9);
    color: var(--text);
    font-weight: 500;
    cursor: pointer;
}

/* 宠物卡片网格 */
.pets-grid-section {
    padding: 60px 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 40px;
    color: var(--text);
}

.count-badge {
    background: var(--primary);
    color: white;
    padding: 5px 15px;
    border-radius: 50px;
    font-size: 1rem;
    vertical-align: middle;
    margin-left: 10px;
}

.pets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
    padding: 20px 0;
}

.pet-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

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

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

.pet-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.pet-category-tag {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--primary);
    color: white;
    padding: 5px 12px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.pet-card-body {
    padding: 20px;
}

.pet-card-body h3 {
    font-size: 1.3rem;
    margin-bottom: 5px;
    color: var(--text);
}

.pet-breed {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.pet-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 10px;
    font-size: 0.9rem;
    color: var(--text-light);
}

.pet-meta i {
    margin-right: 5px;
    color: var(--primary);
}

.pet-desc {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 15px;
}

.pet-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid var(--border);
}

.pet-status {
    padding: 5px 15px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
}

.pet-status.available {
    background: #d4edda;
    color: #155724;
}

.pet-status.adopted {
    background: #f8d7da;
    color: #721c24;
}

.btn-favorite {
    background: none;
    border: 2px solid var(--border);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
}

.btn-favorite:hover, .btn-favorite.active {
    color: #e74c3c;
    border-color: #e74c3c;
    background: #fce4ec;
}

.no-results {
    text-align: center;
    padding: 60px;
    color: var(--text-light);
}

.no-results i {
    font-size: 3rem;
    margin-bottom: 15px;
    color: var(--primary);
}

/* 热力图 */
.heatmap-section {
    background: var(--bg-secondary);
    padding: 60px 0;
}

.heatmap-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.heatmap-item {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    position: relative;
    transition: var(--transition);
    cursor: pointer;
}

.heatmap-item:hover {
    transform: scale(1.2);
    z-index: 10;
}

.heatmap-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.heatmap-item span {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.7);
    color: white;
    font-size: 0.7rem;
    text-align: center;
    padding: 2px;
}

/* 分享区域 */
.share-section {
    padding: 60px 0;
    text-align: center;
}

.share-section h2 {
    margin-bottom: 30px;
    font-size: 1.8rem;
}

.share-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    justify-content: center;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 25px;
    border-radius: 50px;
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.share-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.share-btn.facebook { background: #3b5998; }
.share-btn.twitter { background: #1da1f2; }
.share-btn.linkedin { background: #0077b5; }
.share-btn.whatsapp { background: #25d366; }

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3, .footer-section h4 {
    margin-bottom: 20px;
    color: var(--text);
}

.footer-section a {
    display: block;
    color: var(--text-light);
    text-decoration: none;
    margin-bottom: 10px;
    transition: var(--transition);
}

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

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

/* 内页通用样式 */
.page-content {
    max-width: 800px;
    margin: 60px auto;
    padding: 0 20px;
}

.page-content h1 {
    font-size: 2.2rem;
    margin-bottom: 30px;
    color: var(--primary);
}

.page-content h2 {
    font-size: 1.5rem;
    margin: 30px 0 15px;
    color: var(--text);
}

.page-content p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: var(--text-light);
}

/* 管理后台 */
.admin-body {
    background: var(--bg-secondary);
    min-height: 100vh;
}

.admin-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 40px 20px;
}

.login-form {
    max-width: 400px;
    margin: 100px auto;
    background: var(--card-bg);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

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

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.admin-header h1 {
    color: var(--primary);
}

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

.btn-danger {
    background: #e74c3c;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-secondary {
    background: var(--border);
    color: var(--text);
    border: none;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
}

.btn-secondary:hover {
    background: #b2bec3;
}

.alert {
    padding: 15px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.error-msg {
    color: #e74c3c;
    margin-bottom: 15px;
    text-align: center;
}

.admin-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 25px;
    border: 2px solid var(--border);
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    color: var(--text);
}

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

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

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

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text);
}

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

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(255,107,107,0.2);
}

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

.pet-list-item {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--card-bg);
    padding: 15px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
}

.pet-list-item img {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    object-fit: cover;
}

.pet-info {
    flex: 1;
}

.status-badge {
    padding: 3px 10px;
    border-radius: 50px;
    font-size: 0.8rem;
    margin-left: 10px;
}

.status-badge.available { background: #d4edda; color: #155724; }
.status-badge.adopted { background: #f8d7da; color: #721c24; }

.btn-sm {
    padding: 8px 12px;
    font-size: 0.9rem;
}

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

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

.stat-card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text);
}

.stat-label {
    color: var(--text-light);
    margin-top: 5px;
}

.info-text {
    color: var(--text-light);
    margin-bottom: 20px;
}

/* 响应式 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--card-bg);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
    }
    .nav-menu.active {
        display: flex;
    }
    .hamburger {
        display: flex;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .hero p {
        font-size: 1rem;
    }
    .pets-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    .filter-extra {
        flex-direction: column;
        align-items: center;
    }
    .filter-select {
        width: 100%;
        max-width: 300px;
    }
    .admin-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.6rem;
    }
    .pets-grid {
        grid-template-columns: 1fr;
    }
    .share-buttons {
        flex-direction: column;
        align-items: center;
    }
    .share-btn {
        width: 100%;
        justify-content: center;
    }
}