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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #2d3748;
}

.nav-logo i {
    margin-right: 10px;
    color: #4299e1;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    text-decoration: none;
    color: #4a5568;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #4299e1;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #4299e1, #667eea);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* 管理后台图标特殊样式 */
.nav-link[href="admin.html"] {
    display: flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: 20px;
    background: rgba(66, 153, 225, 0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(66, 153, 225, 0.2);
}

.nav-link[href="admin.html"]:hover {
    background: rgba(66, 153, 225, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(66, 153, 225, 0.3);
}

.nav-link[href="admin.html"] i {
    font-size: 1.1rem;
    color: #4299e1;
    margin-right: 5px;
}

.nav-link[href="admin.html"]:hover i {
    color: #3182ce;
    transform: rotate(90deg);
    transition: transform 0.3s ease;
}

.nav-link[href="admin.html"] span {
    color: #4299e1;
    font-weight: 500;
}

.nav-link[href="admin.html"]:hover span {
    color: #3182ce;
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: #4a5568;
    margin: 3px 0;
    transition: 0.3s;
}

/* 主页区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(45deg, #ffd89b, #19547b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-bottom: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: #ffd89b;
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.cta-button {
    background: linear-gradient(45deg, #ffd89b, #19547b);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.floating-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.card-image {
    width: 300px;
    height: 200px;
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 15px;
}

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

.card-info h3 {
    color: white;
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.card-info p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 5px;
}

.date {
    color: #ffd89b;
    font-size: 0.9rem;
    font-weight: 500;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 30px;
    height: 30px;
    border: 2px solid white;
    border-top: none;
    border-left: none;
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* 相册区域 */
.gallery {
    padding: 100px 0;
    background: #f7fafc;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 15px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: #718096;
    max-width: 600px;
    margin: 0 auto;
}

/* 山的封面网格 */
.mountain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.mountain-card {
    position: relative;
    border-radius: 25px;
    overflow: hidden;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    transition: all 0.4s ease;
    cursor: pointer;
    background: white;
}

.mountain-card:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.2);
}

.mountain-cover {
    position: relative;
    height: 400px;
    overflow: hidden;
}

.mountain-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

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

.mountain-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.9), rgba(118, 75, 162, 0.9));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.4s ease;
}

.mountain-card:hover .mountain-overlay {
    opacity: 1;
}

.mountain-info {
    text-align: center;
    color: white;
    padding: 30px;
    transform: translateY(20px);
    transition: transform 0.4s ease;
}

.mountain-card:hover .mountain-info {
    transform: translateY(0);
}

.mountain-info h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.mountain-info p {
    font-size: 1.1rem;
    margin-bottom: 25px;
    opacity: 0.9;
    line-height: 1.6;
}

.mountain-stats {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.mountain-stats span {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    opacity: 0.9;
    background: rgba(255, 255, 255, 0.2);
    padding: 8px 12px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

.mountain-stats i {
    font-size: 0.8rem;
}

.view-mountain-btn {
    background: linear-gradient(45deg, #ffd89b, #19547b);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.view-mountain-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.view-mountain-btn i {
    transition: transform 0.3s ease;
}

.mountain-card:hover .view-mountain-btn i {
    transform: translateX(5px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .mountain-grid {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 0 20px;
    }
    
    .mountain-cover {
        height: 300px;
    }
    
    .mountain-info h3 {
        font-size: 1.5rem;
    }
    
    .mountain-info p {
        font-size: 1rem;
    }
    
    .mountain-stats {
        gap: 15px;
    }
    
    .mountain-stats span {
        font-size: 0.8rem;
        padding: 6px 10px;
    }
}

/* 关于区域 */
.about {
    padding: 100px 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    color: #4a5568;
    margin-bottom: 20px;
    line-height: 1.7;
}

.about-stats {
    margin-top: 40px;
}

.about-stat {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
    padding: 20px;
    background: #f7fafc;
    border-radius: 15px;
    transition: all 0.3s ease;
}

.about-stat:hover {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    transform: translateX(10px);
}

.about-stat i {
    font-size: 1.5rem;
    margin-right: 15px;
    color: #4299e1;
}

.about-stat:hover i {
    color: white;
}

.about-stat h4 {
    font-size: 1.1rem;
    margin-bottom: 5px;
    font-weight: 600;
}

.about-stat p {
    margin: 0;
    opacity: 0.8;
}

.about-image {
    display: flex;
    justify-content: center;
}

.image-container {
    width: 400px;
    height: 500px;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 页脚 */
.footer {
    background: #2d3748;
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 15px;
    color: #ffd89b;
}

.footer-section p {
    margin-bottom: 10px;
    opacity: 0.8;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: linear-gradient(45deg, #4299e1, #667eea);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.6;
}

/* 图片查看器 */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
}

.close-lightbox {
    position: absolute;
    top: -40px;
    right: 0;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    z-index: 2001;
}

.lightbox-image {
    max-width: 100%;
    max-height: 100%;
    border-radius: 10px;
}

.lightbox-info {
    position: absolute;
    bottom: -60px;
    left: 0;
    right: 0;
    color: white;
    text-align: center;
}

.lightbox-title {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.lightbox-description {
    margin-bottom: 5px;
    opacity: 0.8;
}

.lightbox-location {
    font-size: 0.9rem;
    opacity: 0.6;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .image-container {
        width: 100%;
        max-width: 350px;
        height: 400px;
    }
    
    .photo-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-container {
        gap: 10px;
    }
    
    .filter-btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .floating-card {
        width: 100%;
        max-width: 300px;
    }
    
    .card-image {
        width: 100%;
        height: 150px;
    }
}