/* 前端样式 - 现代化高大上界面 */
:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --accent-color: #e74c3c;
    --text-color: #2c3e50;
    --light-text: #ecf0f1;
    --background: #f9f9f9;
    --card-bg: #ffffff;
    --shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Noto Sans SC', sans-serif;
    color: var(--text-color);
    background-color: var(--background);
    line-height: 1.6;
}

.container {
    width: 100%;
    min-height: 100vh;
}

/* 前端部分 */
.frontend {
    width: 100%;
    min-height: 100vh;
    background-color: var(--background);
}

/* 头部导航 */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background-color: var(--card-bg);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo i {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

nav ul li a i {
    font-size: 1.2rem;
}

nav ul li a:hover {
    color: var(--primary-color);
}

nav ul li.active a {
    color: var(--primary-color);
}

/* 英雄区域 */
.hero {
    height: 70vh;
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://source.unsplash.com/1600x900/?china,landscape');
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--light-text);
}

.hero-content {
    max-width: 800px;
    padding: 2rem;
}

.hero h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    background-color: #2980b9;
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

/* 特性区域 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 5rem 5%;
    background-color: var(--card-bg);
}

.feature {
    text-align: center;
    padding: 2rem;
    border-radius: 10px;
    transition: var(--transition);
}

.feature:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow);
}

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

.feature h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.feature p {
    color: #7f8c8d;
}

/* 热门景点 */
.popular-spots {
    padding: 5rem 5%;
}

.popular-spots h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    position: relative;
}

.popular-spots h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.spots-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.spot {
    background-color: var(--card-bg);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.spot:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.spot-image {
    height: 200px;
    background-size: cover;
    background-position: center;
}

.spot-info {
    padding: 1.5rem;
}

.spot-info h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.spot-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    color: #7f8c8d;
}

.spot-meta span {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.spot-meta i {
    color: var(--primary-color);
}

.spot-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.5rem;
}

.price {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--accent-color);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.btn-secondary:hover {
    background-color: #27ae60;
}

/* 页脚 */
footer {
    background-color: #2c3e50;
    color: var(--light-text);
    padding: 4rem 5% 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    position: relative;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-section p {
    margin-bottom: 1rem;
    opacity: 0.8;
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: var(--transition);
}

.social-icons a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.social-icons i {
    color: var(--light-text);
    font-size: 1.2rem;
}

.copyright {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h2 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.2rem;
    }
    
    nav ul {
        gap: 1rem;
    }
    
    .spots-container {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    header {
        flex-direction: column;
        padding: 1rem;
    }
    
    nav ul {
        margin-top: 1rem;
    }
    
    .btn-primary {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
}