:root {
    /* Colors */
    --primary-color: #e60012;
    --primary-dark: #cc0010;
    --secondary-color: #ffd700;
    --text-color: #333;
    --text-light: #666;
    --background-color: #fff;
    --background-light: #f9f9f9;
    --background-dark: #f5f5f5;
    --border-color: #ddd;
    --success-color: #28a745;
    --error-color: #dc3545;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Typography */
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-xxl: 2rem;
    
    /* Layout */
    --border-radius: 8px;
    --border-radius-lg: 16px;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 6px rgba(0, 0, 0, 0.1);
    
    /* Z-index layers */
    --z-menu: 100;
    --z-overlay: 200;
    --z-modal: 300;
    --z-toast: 400;
    
    --grid-gap: 20px;
    --card-min-width: 300px;
    --section-padding: 60px;
    --container-width: 1200px;
    --transition: all 0.3s ease;
}

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: var(--z-modal);
    transition: top 0.3s;
}

.skip-link:focus {
    top: 0;
}

/* Mobile Menu */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--spacing-sm);
    cursor: pointer;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-color);
    position: relative;
    transition: background 0.3s;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    background: var(--text-color);
    transition: transform 0.3s;
}

.hamburger::before { top: -6px; }
.hamburger::after { bottom: -6px; }

.menu-toggle[aria-expanded="true"] .hamburger {
    background: transparent;
}

.menu-toggle[aria-expanded="true"] .hamburger::before {
    transform: rotate(45deg);
    top: 0;
}

.menu-toggle[aria-expanded="true"] .hamburger::after {
    transform: rotate(-45deg);
    bottom: 0;
}

/* Mobile Action Bar */
.mobile-action-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    padding: var(--spacing-sm);
    box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.1);
    z-index: var(--z-menu);
}

.action-button {
    background: none;
    border: none;
    padding: var(--spacing-sm);
    color: var(--text-color);
    cursor: pointer;
    transition: color 0.3s;
}

.action-button.primary {
    background: var(--primary-color);
    color: white;
    border-radius: var(--border-radius);
    padding: var(--spacing-sm) var(--spacing-lg);
}

.action-button:hover {
    color: var(--primary-color);
}

.action-button.primary:hover {
    background: var(--primary-dark);
    color: white;
}

/* Print Styles */
@media print {
    .mobile-action-bar,
    .nav-links,
    .menu-toggle {
        display: none !important;
    }
    
    .attraction-content {
        margin: 0;
        padding: 0;
    }
    
    .attraction-gallery img {
        max-height: 200px;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        padding: var(--spacing-md);
        box-shadow: var(--shadow);
        flex-direction: column;
        align-items: stretch;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .nav-links a {
        padding: var(--spacing-md);
        text-align: center;
    }
    
    .mobile-action-bar {
        display: flex;
        justify-content: space-around;
        align-items: center;
    }
    
    .attraction-header {
        margin-bottom: var(--spacing-xl);
    }
    
    main {
        margin-bottom: 60px; /* Space for mobile action bar */
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #c00;
        --text-color: #000;
        --background-color: #fff;
    }
    
    .attraction-meta span {
        border: 1px solid currentColor;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}

/* 重置和基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.nav-links {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    transition: background-color 0.3s;
}

.nav-links a:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

/* Hero区域 */
.hero {
    height: 70vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    margin-top: 70px;
    background: linear-gradient(rgba(0,0,0,0.3), rgba(0,0,0,0.3)), 
                url('../assets/images/hero-bg.jpg') no-repeat center center;
    background-size: cover;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 20px;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    margin-bottom: 30px;
    opacity: 0.9;
}

/* 搜索栏 */
.search-container {
    width: 100%;
    max-width: 600px;
    margin: 30px auto 0;
    padding: 0 20px;
}

.search-bar {
    display: flex;
    align-items: center;
    background: white;
    border-radius: var(--border-radius);
    padding: 15px 20px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.search-icon {
    color: var(--text-light);
    margin-right: var(--spacing-md);
}

.search-input {
    width: 100%;
    border: none;
    font-size: 1.1rem;
    padding: 0 10px;
}

/* 城市卡片网格 */
.city-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(var(--card-min-width), 1fr));
    gap: var(--grid-gap);
    padding: var(--section-padding) 20px;
}

.card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

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

.card-content {
    padding: 20px;
}

/* 特色体验区块 */
.experiences {
    background: var(--background-dark);
    padding: var(--section-padding) 0;
}

.experiences-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--grid-gap);
    padding: 0 20px;
    max-width: var(--container-width);
    margin: 0 auto;
}

/* 响应式设计 */
@media (max-width: 768px) {
    :root {
        --section-padding: 40px;
    }

    .nav-container {
        height: auto;
        padding: 15px 20px;
        flex-direction: column;
    }

    .nav-links {
        margin-top: 15px;
        flex-direction: column;
        gap: 10px;
    }

    .hero {
        height: 60vh;
        margin-top: 110px;
    }

    .search-bar {
        padding: 10px 15px;
    }

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

@media (max-width: 480px) {
    .hero {
        height: 50vh;
    }

    .card img {
        height: 150px;
    }

    .search-container {
        padding: 0 10px;
    }

    .city-cards {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: var(--section-padding) 10px;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.card {
    animation: fadeIn 0.6s ease-out;
}

/* 工具类 */
.text-center { text-align: center; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }

/* Section Styles */
section {
    padding: var(--spacing-xl) var(--spacing-md);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--text-color);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Footer */
footer {
    background-color: var(--background-dark);
    padding: var(--spacing-xl) var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.footer-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

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

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

.footer-bottom {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid #ddd;
}

/* Itinerary Page Specific Styles */
.itinerary-page h1 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.itinerary-controls {
    background: #f5f5f5;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
}

.add-day-form {
    max-width: 600px;
    margin: 0 auto;
}

.add-day-form h3 {
    margin-bottom: var(--spacing-md);
}

.add-day-form select,
.attraction-input {
    width: 100%;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.attraction-inputs {
    margin-bottom: var(--spacing-md);
}

.add-attraction-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    padding: var(--spacing-sm) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.primary-button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    cursor: pointer;
    width: 100%;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: background-color 0.3s;
}

.primary-button:hover {
    background-color: #cc0010;
}

.itinerary-container {
    display: grid;
    gap: var(--spacing-md);
}

.day-card {
    background: white;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    position: relative;
}

.day-card h3 {
    margin-bottom: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.day-card ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.day-card li {
    padding: var(--spacing-sm);
    background: #f9f9f9;
    margin-bottom: var(--spacing-sm);
    border-radius: var(--border-radius);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.delete-btn {
    background: none;
    border: none;
    color: #dc3545;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.delete-btn:hover {
    color: #bd2130;
}

.itinerary-summary {
    background: #f5f5f5;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-lg);
}

.itinerary-summary h3 {
    margin-bottom: var(--spacing-md);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.day-card {
    animation: fadeIn 0.3s ease-out;
}

/* Attraction Detail Page Styles */
.attraction-detail-page {
    max-width: 1200px;
    margin: var(--spacing-lg) auto;
    padding: 0 var(--spacing-md);
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.loading-overlay.active {
    display: flex;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.attraction-not-found {
    text-align: center;
    padding: var(--spacing-lg);
}

.breadcrumb {
    margin-bottom: var(--spacing-lg);
    color: #666;
}

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

.breadcrumb a:hover {
    text-decoration: underline;
}

.attraction-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
}

.attraction-info h1 {
    margin-bottom: var(--spacing-sm);
    font-size: 2.5rem;
}

.attraction-meta {
    display: flex;
    gap: var(--spacing-sm);
}

.city-tag,
.category-tag {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
}

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

.category-tag {
    background: #f0f0f0;
    color: #666;
}

.add-to-itinerary-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: background-color 0.3s;
}

.add-to-itinerary-btn:hover {
    background-color: #cc0010;
}

.attraction-gallery {
    margin-bottom: var(--spacing-lg);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.attraction-gallery img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    cursor: pointer;
    transition: transform 0.3s;
}

.attraction-gallery img:hover {
    transform: scale(1.02);
}

.attraction-details {
    display: grid;
    gap: var(--spacing-lg);
}

.detail-section {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.detail-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-color);
    font-size: 1.5rem;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.info-item {
    text-align: center;
    padding: var(--spacing-md);
    background: #f9f9f9;
    border-radius: var(--border-radius);
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.info-item h4 {
    margin-bottom: var(--spacing-sm);
    color: #666;
}

.location-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.location-info i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.attraction-map {
    height: 300px;
    background: #f0f0f0;
    border-radius: var(--border-radius);
    margin-top: var(--spacing-md);
}

.tips-list {
    list-style: none;
    padding: 0;
}

.tips-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid #eee;
}

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

.tips-list i {
    color: var(--primary-color);
}

.related-attractions {
    margin-top: var(--spacing-lg);
}

.related-attractions h3 {
    margin-bottom: var(--spacing-md);
}

.attractions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.attraction-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

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

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

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

.attraction-card h4 {
    margin-bottom: var(--spacing-sm);
}

.attraction-card p {
    color: #666;
    margin-bottom: var(--spacing-md);
}

.view-more-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
    text-decoration: none;
}

.view-more-btn:hover {
    text-decoration: underline;
}

/* Notification Styles */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: var(--spacing-md);
    background: white;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transform: translateX(120%);
    transition: transform 0.3s ease-out;
    z-index: 1000;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    border-left: 4px solid #28a745;
}

.notification.error {
    border-left: 4px solid #dc3545;
}

.notification i {
    font-size: 1.2rem;
}

.notification.success i {
    color: #28a745;
}

.notification.error i {
    color: #dc3545;
}

/* Responsive Design */
@media (max-width: 768px) {
    .attraction-header {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .add-to-itinerary-btn {
        width: 100%;
        justify-content: center;
    }
    
    .attraction-gallery img {
        height: 300px;
    }
    
    .info-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .attraction-info h1 {
        font-size: 2rem;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .attraction-gallery img {
        height: 200px;
    }
}

/* Breadcrumb Styles */
.breadcrumb ol {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb li:not(:last-child)::after {
    content: "›";
    margin: 0 var(--spacing-sm);
    color: #666;
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s;
}

.breadcrumb a:hover {
    color: #cc0010;
}

/* Article Structure */
.attraction-content {
    max-width: 1200px;
    margin: 0 auto;
}

.attraction-content > * + * {
    margin-top: var(--spacing-lg);
}

/* Map Styles */
.map-container {
    margin: var(--spacing-md) 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: #f5f5f5;
}

.static-map {
    position: relative;
    width: 100%;
    height: 300px;
    background: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
}

.static-map img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.map-container figcaption {
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.9);
    font-size: 0.9rem;
    color: #666;
    text-align: center;
}

/* Transportation Info */
.transportation-info {
    background: #f9f9f9;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    margin-top: var(--spacing-lg);
}

.transport-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.transport-option {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.transport-option i {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.transport-option h3 {
    margin: var(--spacing-sm) 0;
    color: var(--text-color);
}

/* Semantic Headings */
.attraction-content h2 {
    font-size: 1.5rem;
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
}

.attraction-content h3 {
    font-size: 1.2rem;
    color: var(--text-color);
    margin-bottom: var(--spacing-sm);
}

/* Address Element */
address {
    font-style: normal;
    line-height: 1.6;
    color: #666;
}

/* Figure Elements */
figure {
    margin: 0;
}

figcaption {
    font-size: 0.9rem;
    color: #666;
    padding: var(--spacing-sm) 0;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .breadcrumb {
        font-size: 0.9rem;
    }
    
    .transport-options {
        grid-template-columns: 1fr;
    }
    
    .static-map {
        height: 250px;
    }
}

@media (max-width: 480px) {
    .breadcrumb ol {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .breadcrumb li {
        margin: 2px 0;
    }
    
    .breadcrumb li:not(:last-child)::after {
        display: none;
    }
    
    .static-map {
        height: 200px;
    }
}