/* Base Components */
:root {
    --search-height: 180px;
    --search-padding: 30px;
    --card-margin: 30px;
    --mobile-padding: 20px;
}

/* Search Area */
.search-area {
    background-color: var(--background-color);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

/* 搜索区域优化 */
.search-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 30px var(--spacing-lg); /* 增加内边距 */
    height: 180px; /* 增加高度 */
    margin-bottom: 40px; /* 增加底部间距 */
    position: relative;
    z-index: 10; /* 确保在卡片上方 */
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: var(--font-size-lg);
    background-color: white;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(230, 0, 18, 0.1);
    outline: none;
}

/* Main Content Area */
.main-content {
    padding-top: var(--spacing-xl);
    background-color: var(--background-light);
    min-height: calc(100vh - var(--header-height));
}

/* 城市卡片容器优化 */
.city-cards-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    margin-top: 30px; /* 增加上边距 */
    position: relative;
    z-index: 5;
}

/* 热门城市展示区域 */
.featured-cities {
    padding: 60px 0;
    background-color: var(--background-light);
}

.featured-cities .section-header {
    text-align: center;
    margin-bottom: 40px;
}

.featured-cities .section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--text-color);
}

.featured-cities .section-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* 城市卡片网格 */
#featuredCities {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 城市卡片样式 */
.city-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    position: relative;
}

.city-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.city-image-container {
    position: relative;
    height: 240px;
    overflow: hidden;
}

.city-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.city-content {
    padding: 25px;
}

.city-name {
    font-size: 1.8rem;
    font-weight: 600;
    margin: 0 0 10px 0;
    color: var(--text-color);
}

.city-description {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.6;
    margin: 0 0 20px 0;
}

.city-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

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

.attractions-count {
    color: var(--text-light);
    font-size: 0.9rem;
    background-color: var(--background-light);
    padding: 6px 12px;
    border-radius: 20px;
}

/* 旅行贴士区域 */
.travel-tips {
    padding: 60px 0;
    background-color: white;
}

.tips-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.tip-card {
    background: var(--background-light);
    padding: 25px;
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}

.tip-title {
    font-size: 1.3rem;
    margin: 0 0 15px 0;
    color: var(--text-color);
    font-weight: 600;
}

.tip-content {
    color: var(--text-light);
    line-height: 1.6;
    margin: 0;
}

/* 特色体验区域 */
.experiences {
    padding: 60px 0;
    background-color: var(--background-light);
}

.experiences-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.experience-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

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

.experience-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.experience-card h3 {
    font-size: 1.5rem;
    margin: 0 0 15px 0;
    color: var(--text-color);
}

.experience-card p {
    color: var(--text-light);
    line-height: 1.6;
    margin: 0;
}

.city-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    padding-top: var(--spacing-xl);
}

/* City Card */
.city-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.city-hero-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.city-card-content {
    padding: var(--spacing-lg);
}

.city-card-title {
    margin: 0 0 var(--spacing-sm);
    font-size: var(--font-size-xl);
    color: var(--text-color);
}

.city-card-description {
    margin: 0 0 var(--spacing-md);
    color: var(--text-light);
}

.city-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

/* Loading States */
.city-card.loading {
    pointer-events: none;
}

.city-card.loading .city-card-image {
    background: linear-gradient(110deg, #ececec 8%, #f5f5f5 18%, #ececec 33%);
    background-size: 200% 100%;
    animation: shimmer 1.5s linear infinite;
}

.city-card.loading .city-card-title,
.city-card.loading .city-card-description {
    background: #ececec;
    border-radius: 4px;
    height: 20px;
    margin-bottom: 10px;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .search-area {
        padding: var(--spacing-md);
        background-color: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(8px);
    }

    .search-container {
        height: auto;
        padding: 20px 15px;
    }
    
    .city-cards-container {
        margin-top: 20px;
    }
    
    /* 移动端城市卡片优化 */
    #featuredCities {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 15px;
    }
    
    .city-card {
        border-radius: 12px;
    }
    
    .city-image-container {
        height: 200px;
    }
    
    .city-content {
        padding: 20px;
    }
    
    .city-name {
        font-size: 1.5rem;
    }
    
    .city-actions {
        flex-direction: column;
        gap: 10px;
        align-items: stretch;
    }
    
    .btn {
        text-align: center;
    }
    
    .attractions-count {
        text-align: center;
    }
    
    .featured-cities .section-header h2 {
        font-size: 2rem;
    }
    
    .tips-container {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 15px;
    }
    
    .experiences-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 15px;
    }

    .search-input {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-base);
    }

    .city-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        padding-top: var(--spacing-lg);
    }

    .main-content {
        padding-top: var(--spacing-lg);
    }

    .city-card-image {
        height: 150px;
    }

    .city-card-content {
        padding: var(--mobile-padding);
    }
}

/* High Contrast & Accessibility */
@media (prefers-contrast: high) {
    .city-card {
        border: 2px solid currentColor;
    }

    .search-input {
        border: 2px solid currentColor;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .city-card {
        transition: none;
    }

    .city-card:hover {
        transform: none;
    }
}

/* Loading Animation */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Print Styles */
@media print {
    .search-container {
        display: none;
    }

    .city-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #000;
    }
}

/* Card Component */
.card {
    background: var(--background-light);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-content {
    padding: var(--spacing-md);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-color);
}

.card-description {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

/* Badge Component */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-right: var(--spacing-sm);
}

.badge-primary {
    background-color: var(--primary-color);
    color: white;
}

.badge-secondary {
    background-color: var(--secondary-color);
    color: var(--text-color);
}

/* List Component */
.list-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid #eee;
}

.list-item:last-child {
    border-bottom: none;
}

.list-item-icon {
    margin-right: var(--spacing-md);
    color: var(--primary-color);
}

/* Form Components */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

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

/* Alert Component */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.alert-success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border: 1px solid #c8e6c9;
}

.alert-error {
    background-color: #ffebee;
    color: #c62828;
    border: 1px solid #ffcdd2;
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}