/* --- 全局变量和样式重置 --- */
:root {
    --primary-color: #007BFF; /* 主色调，例如天空蓝 */
    --secondary-color: #f8f9fa; /* 背景色 */
    --text-color: #333;
    --light-text-color: #666;
    --border-color: #e0e0e0;
    --white-color: #ffffff;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    --font-family: 'Helvetica Neue', Arial, 'Hiragino Sans GB', 'Microsoft Yahei', sans-serif;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white-color);
}

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

h1, h2, h3 {
    margin-bottom: 1rem;
    font-weight: 600;
    line-height: 1.2;
}

h2 {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    margin: 0.8rem auto 0;
    border-radius: 2px;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease, transform 0.3s ease;
}

a:hover {
    color: #0056b3;
    transform: translateY(-2px);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* --- 页头 Header --- */
.site-header {
    background-color: var(--white-color);
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

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

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

.main-nav a {
    font-weight: 500;
    color: var(--text-color);
    padding-bottom: 5px;
    border-bottom: 2px solid transparent;
}

.main-nav a:hover, .main-nav a.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-color);
    margin: 3px 0;
    transition: 0.3s;
}

/* --- 主内容区 Main Content --- */

/* Hero Section */
.hero-section {
    background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url('https://picsum.photos/seed/hero-travel/1920/1080.jpg') no-repeat center center/cover;
    height: 80vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--white-color);
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.5);
}

.hero-content p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: 0 auto 2rem auto;
    text-shadow: 1px 1px 4px rgba(0,0,0,0.5);
}

.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--white-color);
    padding: 12px 30px;
    font-size: 1.1rem;
    border-radius: 50px;
    font-weight: bold;
    box-shadow: var(--shadow);
}

.cta-button:hover {
    background-color: #0056b3;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.1);
}

/* Content Sections */
.content-section {
    padding: 80px 0;
}

.alt-bg {
    background-color: var(--secondary-color);
}

/* Card Grid for Stories */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.card {
    background-color: var(--white-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.12);
}

.card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.card-content {
    padding: 1.5rem;
}

.card-content h3 a {
    color: var(--text-color);
    font-size: 1.3rem;
}

.card-content h3 a:hover {
    color: var(--primary-color);
}

.card-content p {
    color: var(--light-text-color);
    margin-bottom: 1rem;
}

.meta-info {
    font-size: 0.9rem;
    color: #999;
    display: flex;
    gap: 1.5rem;
}

.meta-info i {
    margin-right: 5px;
}

/* Destination Grid */
.destination-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.destination-card {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.destination-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.destination-card:hover img {
    transform: scale(1.1);
}

.destination-name {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    color: var(--white-color);
    padding: 1.5rem 1rem 1rem;
    font-size: 1.2rem;
    font-weight: bold;
}

/* --- 页脚 Footer --- */
.site-footer {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 60px 0 20px 0;
}

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

.footer-about h3, .footer-links h4, .footer-social h4 {
    color: var(--white-color);
    margin-bottom: 1rem;
}

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

.footer-links ul li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #bdc3c7;
}

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

.footer-social a {
    color: #bdc3c7;
    font-size: 1.5rem;
    margin-right: 1rem;
}

.footer-social a:hover {
    color: var(--white-color);
}

.footer-bottom {
    text-align: center;
    border-top: 1px solid #34495e;
    padding-top: 20px;
    font-size: 0.9rem;
    color: #95a5a6;
}

.footer-bottom a {
    color: #95a5a6;
}
.footer-bottom a:hover {
    color: var(--white-color);
}


/* --- 响应式设计 --- */
@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white-color);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .main-nav.is-active {
        left: 0;
    }

    .menu-toggle {
        display: flex;
    }
    
    .menu-toggle.is-active .bar:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.is-active .bar:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

    .menu-toggle.is-active .bar:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    h2 {
        font-size: 1.8rem;
    }

    .meta-info {
        flex-direction: column;
        gap: 0.5rem;
    }
}