/* ============================================
   全局样式和变量
============================================ */
:root {
    --primary-color: #2e7d32;
    --primary-dark: #1b5e20;
    --primary-light: #8bc34a;
    --accent-color: #ff9800;
    --light-bg: #f1f8e9;
    --dark-color: #333;
    --light-color: #fff;
    --gray-light: #f5f5f5;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #f9f9f9;
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* 隐藏所有radio和checkbox */
.hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   通用组件样式
============================================ */

/* 按钮 */
.btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 12px 30px;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
    text-align: center;
}

.btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

/* 部分标题 */
.section-title {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin: 2rem 0 1.5rem;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-light);
    display: inline-block;
}

.section-title-center {
    text-align: center;
    display: block;
}

/* ============================================
   头部和导航 - CSS-only移动菜单
============================================ */
.header {
    background-color: var(--primary-color);
    padding: 0.8rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

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

.logo h1 {
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.8rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* 导航菜单 */
.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-menu a {
    color: rgba(255,255,255,0.9);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: var(--transition);
    font-weight: 500;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: white;
    background-color: rgba(255,255,255,0.15);
}

.lang-switch {
    background-color: var(--primary-dark);
    padding: 0.5rem 1rem !important;
    margin-left: 0.5rem;
}

/* ============================================
   页面横幅
============================================ */
.page-header {
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), 
                url('https://p1.piqsels.com/preview/879/40/1/zhangjiajie-natural-beauty-mountain-stone-blue-sky-tourism.jpg');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 5rem 0;
    text-align: center;
    margin-bottom: 2rem;
}

.page-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.page-header p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0.9;
}

/* ============================================
   首页特定样式
============================================ */
.hero-banner {
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), 
                url('https://p1.piqsels.com/preview/879/40/1/zhangjiajie-natural-beauty-mountain-stone-blue-sky-tourism.jpg');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero-banner h2 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 6px rgba(0,0,0,0.5);
}

.hero-banner p {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.95;
}

/* 卡片网格 */
.featured-grid,
.attractions-grid,
.gallery-grid,
.theme-grid,
.transport-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

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

.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;
    display: block;
}

.card-content {
    padding: 1.5rem;
}

.card-title {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
}

/* 事实区块 */
.facts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.fact-box {
    background-color: var(--light-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
}

.fact-box:hover {
    background-color: var(--primary-light);
    transform: translateY(-5px);
}

.fact-number {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.fact-box:hover .fact-number {
    color: white;
}

/* ============================================
   景点页面样式
============================================ */
.attraction-card .card-img {
    height: 250px;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0.8rem 0;
}

.tag {
    background-color: var(--primary-light);
    color: var(--primary-dark);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.attraction-info {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #eee;
}

.attraction-info p {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.attraction-info strong {
    color: var(--primary-color);
}

/* ============================================
   画廊页面样式 - CSS-only过滤
============================================ */
.gallery-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin: 2rem 0;
    justify-content: center;
}

.filter-label {
    background-color: var(--light-bg);
    padding: 0.6rem 1.5rem;
    border-radius: 20px;
    color: var(--primary-color);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-label:hover {
    background-color: var(--primary-light);
    color: white;
}

/* CSS画廊过滤系统 */
#filter-all:checked ~ .gallery-container .gallery-item,
#filter-spring:checked ~ .gallery-container .gallery-item[data-category*="spring"],
#filter-summer:checked ~ .gallery-container .gallery-item[data-category*="summer"],
#filter-autumn:checked ~ .gallery-container .gallery-item[data-category*="autumn"],
#filter-winter:checked ~ .gallery-container .gallery-item[data-category*="winter"],
#filter-national-park:checked ~ .gallery-container .gallery-item[data-category*="national-park"] {
    display: block;
    animation: fadeIn 0.5s ease;
}

/* 默认显示所有，隐藏特定过滤器 */
.gallery-item {
    display: none;
}

#filter-all:checked ~ .gallery-container .gallery-item {
    display: block;
}

/* 激活的过滤器标签样式 */
#filter-all:checked ~ .gallery-filters label[for="filter-all"],
#filter-spring:checked ~ .gallery-filters label[for="filter-spring"],
#filter-summer:checked ~ .gallery-filters label[for="filter-summer"],
#filter-autumn:checked ~ .gallery-filters label[for="filter-autumn"],
#filter-winter:checked ~ .gallery-filters label[for="filter-winter"],
#filter-national-park:checked ~ .gallery-filters label[for="filter-national-park"] {
    background-color: var(--primary-color);
    color: white;
}

.gallery-img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

.gallery-item:hover .gallery-img {
    transform: scale(1.05);
}

.gallery-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: white;
    padding: 1.5rem;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
    transform: translateY(0);
}

.gallery-caption {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.gallery-category {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* ============================================
   行程页面样式 - CSS-only标签切换
============================================ */
.tabs {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.tab-label {
    background-color: var(--light-bg);
    padding: 0.8rem 1.8rem;
    border-radius: var(--border-radius);
    color: var(--primary-color);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.tab-label:hover {
    background-color: var(--primary-light);
    color: white;
}

/* CSS标签系统 */
.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

/* 默认显示第一个标签 */
#tab-one-day:checked ~ .tab-content-one-day,
#tab-two-day:checked ~ .tab-content-two-day,
#tab-three-day:checked ~ .tab-content-three-day {
    display: block;
}

/* 激活的标签样式 */
#tab-one-day:checked ~ .tabs label[for="tab-one-day"],
#tab-two-day:checked ~ .tabs label[for="tab-two-day"],
#tab-three-day:checked ~ .tabs label[for="tab-three-day"] {
    background-color: var(--primary-color);
    color: white;
}

.itinerary-day {
    background-color: var(--light-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    border-left: 4px solid var(--primary-color);
}

.day-title {
    color: var(--primary-color);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.time-slot {
    margin-bottom: 1.2rem;
    padding-bottom: 1.2rem;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.time {
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.theme-card {
    background-color: var(--light-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
}

.theme-card:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-5px);
}

.theme-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.theme-card:hover .theme-icon {
    color: white;
}

/* ============================================
   交通页面样式
============================================ */
.transport-card {
    background-color: var(--light-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
}

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

.transport-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.map-container {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin: 2rem 0;
}

.map-image {
    width: 100%;
    max-width: 900px;
    height: auto;
    display: block;
    margin: 0 auto;
    border-radius: 6px;
}

.map-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 1.5rem;
    padding: 1.5rem;
    background-color: var(--light-bg);
    border-radius: var(--border-radius);
}

.legend-color {
    width: 20px;
    height: 20px;
    border-radius: 4px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.info-box {
    background-color: white;
    padding: 1.8rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border-left: 4px solid var(--primary-light);
}

.tips-container {
    background-color: var(--light-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 2rem 0;
}

.tip-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.tip-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

/* ============================================
   咨询页面样式 - CSS-only FAQ和表单
============================================ */
.consultation-form {
    background-color: white;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin: 2rem 0;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-check {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin: 1.5rem 0;
}

/* CSS-only FAQ系统 */
.faq-item {
    background-color: white;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.faq-question {
    padding: 1.2rem 1.5rem;
    background-color: var(--light-bg);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--primary-dark);
    transition: var(--transition);
}

.faq-question:hover {
    background-color: var(--primary-light);
    color: white;
}

.faq-answer {
    padding: 1.5rem;
    border-top: 1px solid #eee;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

/* 使用:checked控制FAQ展开 */
.faq-toggle:checked ~ .faq-answer {
    max-height: 500px;
    padding: 1.5rem;
}

.faq-toggle:checked ~ .faq-question {
    background-color: var(--primary-light);
    color: white;
}

.faq-toggle:checked ~ .faq-question .faq-icon::after {
    content: "▲";
}

.faq-toggle:not(:checked) ~ .faq-question .faq-icon::after {
    content: "▼";
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.contact-card {
    background-color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.hotline-card {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    margin-bottom: 1.5rem;
}

.hotline-number {
    font-size: 2rem;
    font-weight: 700;
    margin: 1rem 0;
}

/* CSS-only表单提交模拟 */
.form-submit-btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 12px 30px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    border: none;
    font-size: 1rem;
    transition: var(--transition);
}

.form-submit-btn:hover {
    background-color: var(--primary-dark);
}

/* 表单提交反馈 */
#form-submit:target .consultation-form {
    background-color: #e8f5e9;
    border: 2px solid var(--primary-color);
}

#form-submit:target .form-submit-btn {
    background-color: var(--primary-dark);
}

/* ============================================
   页脚
============================================ */
.footer {
    background-color: var(--primary-dark);
    color: white;
    padding: 3rem 0 1.5rem;
    margin-top: 4rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2.5rem;
}

.footer-section h4 {
    color: var(--primary-light);
    font-size: 1.2rem;
    margin-bottom: 1.2rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: rgba(255,255,255,0.8);
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.copyright {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 1.5rem;
    text-align: center;
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
}

/* ============================================
   动画和工具类
============================================ */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.alert {
    padding: 1.2rem 1.5rem;
    border-radius: var(--border-radius);
    margin: 1.5rem 0;
}

.alert-info {
    background-color: #e3f2fd;
    color: #1565c0;
    border-left: 4px solid #2196f3;
}

/* ============================================
   CSS-only移动菜单系统
============================================ */
.menu-toggle-checkbox {
    display: none;
}

.menu-toggle-label {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.8rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* 移动端响应式设计 */
@media (max-width: 768px) {
    .menu-toggle-label {
        display: block;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--primary-color);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
    }
    
    /* 使用:checked控制菜单展开 */
    .menu-toggle-checkbox:checked ~ .nav-menu {
        max-height: 500px;
    }
    
    .nav-menu ul {
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu a {
        display: block;
        padding: 1rem 1.5rem;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    
    /* 调整标题大小 */
    .hero-banner h2,
    .page-header h2 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    /* 调整网格列数 */
    .featured-grid,
    .attractions-grid,
    .gallery-grid,
    .theme-grid,
    .transport-grid,
    .contact-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-banner,
    .page-header {
        padding: 4rem 0;
    }
    
    .btn {
        padding: 10px 25px;
    }
    
    .gallery-filters,
    .tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .filter-label,
    .tab-label {
        width: 100%;
        max-width: 250px;
        text-align: center;
    }
}