/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    background-color: #1E50B3;
    color: white;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.navbar-brand h1 {
    font-size: 24px;
    font-weight: bold;
}

.navbar-menu ul {
    display: flex;
    list-style: none;
}

.navbar-menu li {
    margin-left: 30px;
}

.navbar-menu a {
    color: white;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s;
}

.navbar-menu a:hover {
    color: #FF9800;
}

.navbar-toggle {
    display: none;
    cursor: pointer;
}

.navbar-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 5px 0;
    transition: all 0.3s;
}

/* Banner */
.banner {
    background-color: #1E50B3;
    color: white;
    text-align: center;
    padding: 150px 0 100px;
    margin-top: 70px;
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=Nanjing%20skyline%20with%20historical%20buildings%20and%20modern%20skyscrapers%2C%20professional%20travel%20photography&image_size=landscape_16_9');
    background-size: cover;
    background-position: center;
    position: relative;
}

/* 图片懒加载 */
img.lazy-load {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
}

img.lazy-load.loaded {
    opacity: 1;
}

.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(30, 80, 179, 0.7);
}

.banner .container {
    position: relative;
    z-index: 1;
}

.banner h2 {
    font-size: 48px;
    margin-bottom: 20px;
}

.banner p {
    font-size: 20px;
    margin-bottom: 30px;
}

.btn {
    display: inline-block;
    background-color: #FF9800;
    color: white;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 18px;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #e68a00;
}

/* 核心业务简介 */
.intro {
    padding: 80px 0;
    background-color: #f5f5f5;
}

.intro h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #1E50B3;
}

.intro-cards {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.card {
    flex: 1;
    min-width: 300px;
    background-color: white;
    padding: 30px;
    margin: 10px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

.card h4 {
    color: #1E50B3;
    font-size: 20px;
    margin-bottom: 15px;
}

/* 旅游线路 */
.routes {
    padding: 80px 0;
    background-color: #f5f5f5;
}

.routes h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 30px;
    color: #1E50B3;
}

.route-categories {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 50px;
}

.category-btn {
    background-color: white;
    border: 1px solid #1E50B3;
    color: #1E50B3;
    padding: 10px 20px;
    margin: 5px;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 14px;
}

.category-btn:hover {
    background-color: #1E50B3;
    color: white;
}

.category-btn.active {
    background-color: #1E50B3;
    color: white;
}

.route-cards {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.route-card {
    flex: 1;
    min-width: 300px;
    background-color: white;
    margin: 10px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: transform 0.3s;
}

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

.route-img {
    height: 200px;
    background-color: #f0f0f0;
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=Nanjing%20tourist%20attractions%2C%20scenic%20view%2C%20professional%20travel%20photography&image_size=landscape_4_3');
    background-size: cover;
    background-position: center;
}

.route-info {
    padding: 20px;
}

.route-info h4, .route-info h5 {
    color: #1E50B3;
    margin-bottom: 10px;
}

.route-info .price {
    font-size: 18px;
    font-weight: bold;
    color: #FF9800;
    margin-bottom: 5px;
}

.route-info .days {
    font-size: 14px;
    color: #666;
    margin-bottom: 10px;
}

.route-info .highlight {
    margin-bottom: 20px;
    color: #666;
}

.btn-sm {
    display: inline-block;
    background-color: #1E50B3;
    color: white;
    padding: 8px 20px;
    text-decoration: none;
    border-radius: 5px;
    font-size: 14px;
    transition: background-color 0.3s;
}

.btn-sm:hover {
    background-color: #184090;
}

/* 地接业务 */
.services {
    padding: 80px 0;
    background-color: #f5f5f5;
}

.services h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #1E50B3;
}

.service-section {
    margin-bottom: 60px;
}

.service-section h4 {
    font-size: 24px;
    margin-bottom: 30px;
    color: #1E50B3;
}

/* 关于我们 */
.about {
    padding: 80px 0;
}

.about h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #1E50B3;
}

.about-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.about-text {
    flex: 1;
    min-width: 300px;
    margin: 10px;
}

.about-text h4 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #1E50B3;
}

.about-text p {
    margin-bottom: 15px;
    line-height: 1.8;
}

/* 资质证书展示 */
.certificates {
    margin-top: 60px;
}

.certificates h4 {
    font-size: 20px;
    margin-bottom: 30px;
    color: #1E50B3;
    text-align: center;
}

.certificate-cards {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.certificate-card {
    flex: 1;
    min-width: 250px;
    background-color: white;
    margin: 10px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 20px;
    text-align: center;
    transition: transform 0.3s;
}

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

.certificate-img {
    height: 150px;
    background-color: #f0f0f0;
    margin-bottom: 15px;
    border-radius: 5px;
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=Business%20license%20certificate%2C%20official%20document%2C%20professional%20look&image_size=landscape_4_3');
    background-size: cover;
    background-position: center;
}

.certificate-card p {
    color: #333;
    font-weight: bold;
}

/* 接待优势 */
.advantages {
    padding: 80px 0;
    background-color: #f5f5f5;
}

.advantages h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #1E50B3;
}

.advantage-cards {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.advantage-card {
    flex: 1;
    min-width: 250px;
    background-color: white;
    margin: 10px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 30px;
    text-align: center;
    transition: transform 0.3s;
}

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

.advantage-icon {
    width: 80px;
    height: 80px;
    background-color: #1E50B3;
    border-radius: 50%;
    margin: 0 auto 20px;
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=Travel%20service%20icon%2C%20professional%20simple%20design&image_size=square');
    background-size: 50%;
    background-position: center;
    background-repeat: no-repeat;
}

.advantage-card h4 {
    color: #1E50B3;
    margin-bottom: 15px;
    font-size: 20px;
}

.advantage-card p {
    line-height: 1.6;
    color: #666;
}

/* 案例展示 */
.cases {
    padding: 80px 0;
    background-color: #ffffff;
}

.cases h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #1E50B3;
}

.case-cards {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.case-card {
    flex: 1;
    min-width: 300px;
    background-color: white;
    margin: 10px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 20px;
    text-align: center;
    transition: transform 0.3s;
}

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

.case-img {
    height: 200px;
    background-color: #f0f0f0;
    margin-bottom: 20px;
    border-radius: 5px;
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=Travel%20group%20photo%2C%20happy%20tourists%2C%20professional%20photography&image_size=landscape_4_3');
    background-size: cover;
    background-position: center;
}

.case-card h4 {
    color: #1E50B3;
    margin-bottom: 10px;
}

/* 在线咨询 */
.consultation {
    padding: 80px 0;
    background-color: #f5f5f5;
}

.consultation h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #1E50B3;
}

.consultation-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.consultation-info, .consultation-form {
    flex: 1;
    min-width: 300px;
    margin: 10px;
}

.consultation-info h4, .consultation-form h4 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #1E50B3;
}

.consultation-info p {
    margin-bottom: 15px;
    line-height: 1.6;
}

.consultation-info a {
    color: #1E50B3;
    text-decoration: none;
    font-weight: bold;
}

.consultation-info a:hover {
    text-decoration: underline;
}

.consultation-form form {
    display: flex;
    flex-direction: column;
}

.consultation-form input, .consultation-form textarea {
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.consultation-form textarea {
    height: 150px;
    resize: vertical;
}

/* 联系我们 */
.contact {
    padding: 80px 0;
}

.contact h3 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: #1E50B3;
}

.contact-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.contact-info, .contact-map, .contact-form {
    flex: 1;
    min-width: 300px;
    margin: 10px;
}

.contact-info h4, .contact-map h4, .contact-form h4 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #1E50B3;
}

.contact-info p {
    margin-bottom: 15px;
}

.contact-info a {
    color: #1E50B3;
    text-decoration: none;
    font-weight: bold;
}

.contact-info a:hover {
    text-decoration: underline;
}

.wechat-qr {
    width: 150px;
    height: 150px;
    background-color: #f0f0f0;
    margin-top: 10px;
    background-image: url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=WeChat%20QR%20code%20placeholder%2C%20simple%20design&image_size=square');
    background-size: cover;
    background-position: center;
}

.map-container {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.contact-form form {
    display: flex;
    flex-direction: column;
}

.contact-form input, .contact-form textarea {
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.contact-form textarea {
    height: 150px;
    resize: vertical;
}

.form-message {
    margin-top: 15px;
    padding: 10px;
    border-radius: 5px;
    text-align: center;
    display: none;
}

.form-message.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    display: block;
}

/* 底部 */
.footer {
    background-color: #1E50B3;
    color: white;
    padding: 50px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.footer-info, .footer-license, .footer-copyright {
    flex: 1;
    min-width: 250px;
    margin: 10px;
}

.footer-info h4 {
    font-size: 20px;
    margin-bottom: 15px;
}

.footer-license p, .footer-copyright p {
    margin-bottom: 10px;
    font-size: 14px;
}

.footer-copyright {
    text-align: center;
    margin-top: 30px;
    width: 100%;
    border-top: 1px solid rgba(255,255,255,0.2);
    padding-top: 20px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: #1E50B3;
        display: none;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }

    .navbar-menu.active {
        display: block;
    }

    .navbar-menu ul {
        flex-direction: column;
        padding: 20px;
    }

    .navbar-menu li {
        margin: 10px 0;
    }

    .navbar-toggle {
        display: block;
    }

    .banner h2 {
        font-size: 32px;
    }

    .banner p {
        font-size: 16px;
    }

    .intro-cards, .route-cards, .about-content, .advantage-cards, .case-cards, .consultation-content, .contact-content, .footer-content {
        flex-direction: column;
        align-items: center;
    }

    .card, .route-card, .about-text, .advantage-card, .case-card, .consultation-info, .consultation-form, .contact-info, .contact-map, .contact-form, .footer-info, .footer-license {
        width: 100%;
        max-width: 400px;
    }

    .route-categories {
        flex-direction: column;
        align-items: center;
    }

    .category-btn {
        width: 100%;
        max-width: 200px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .banner {
        padding: 120px 0 80px;
    }

    .banner h2 {
        font-size: 28px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 16px;
    }

    .intro, .routes, .services, .about, .cases, .contact {
        padding: 60px 0;
    }

    .intro h3, .routes h3, .services h3, .about h3, .cases h3, .contact h3 {
        font-size: 24px;
    }
}