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

:root {
    --primary-color: #1a5276; /* 深蓝色，代表水与金属质感 */
    --secondary-color: #7fb3d5; /* 浅蓝色，辅助色 */
    --accent-color: #f39c12; /* 橙色，强调色，代表金属光泽 */
    --light-color: #f8f9fa;
    --dark-color: #2c3e50;
    --gray-color: #95a5a6;
    --text-color: #333;
    --text-light: #666;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Noto Sans SC', 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f5f7fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

/* 头部样式 */
header {
    background: linear-gradient(135deg, var(--primary-color), #154360);
    color: white;
    padding: 1.5rem 0;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%230a3d62' fill-opacity='0.1' fill-rule='evenodd'/%3E%3C/svg%3E");
    opacity: 0.1;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.logo {
    display: inline-block;
    transition: var(--transition);
    animation: logo-float 3s ease-in-out infinite;
}

.logo img {
    width: 120px;
    height: 120px;
    object-fit: contain;
    border-radius: 50%;
    border: 3px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
}

.logo:hover img {
    transform: scale(1.1) rotate(5deg);
    border-color: var(--accent-color);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
}

.header-text {
    text-align: left;
    max-width: 600px;
}

header h1 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    position: relative;
    display: inline-block;
    animation: text-glow 2s ease-in-out infinite alternate;
}

header h1 i {
    margin-right: 15px;
    color: var(--accent-color);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    font-weight: 300;
    max-width: 600px;
    margin: 0;
    animation: fade-in-up 1s ease-out;
}

@keyframes logo-float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes text-glow {
    0% {
        text-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
    }
    100% {
        text-shadow: 0 0 15px rgba(255, 255, 255, 0.8), 0 0 20px rgba(243, 156, 18, 0.6);
    }
}

@keyframes fade-in-up {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 0.9;
        transform: translateY(0);
    }
}

/* 主要内容区域 */
main {
    flex: 1;
    padding: 2rem 0;
}

.intro {
    text-align: center;
    margin-bottom: 2.5rem;
    padding: 1.5rem;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.intro p {
    font-size: 1.1rem;
    color: var(--text-light);
}

/* 分类网格 */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 3rem;
}

.category-card {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    height: 280px;
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 25px rgba(0, 0, 0, 0.15);
}

.category-card:hover .category-image {
    transform: scale(1.03);
}

.category-image {
    height: 70%;
    width: 100%;
    object-fit: contain;
    transition: var(--transition);
    background-color: white;
    padding: 5px;
}

.category-info {
    padding: 1.2rem;
    height: 30%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.category-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.category-info p {
    color: var(--gray-color);
    font-size: 0.9rem;
}

/* 图库部分 */
.gallery-section {
    margin-top: 2rem;
}

.gallery-header {
    display: flex;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 20px;
}

.back-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 50px;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

.back-btn:hover {
    background-color: #154360;
    transform: translateX(-5px);
}

#gallery-title {
    font-size: 2rem;
    color: var(--primary-color);
    flex: 1;
}

.gallery-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
}

.gallery-item {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    height: 220px;
    background-color: #f8f9fa;
}

.gallery-item:hover {
    transform: scale(1.03);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
}

.gallery-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: var(--transition);
    background-color: white;
    padding: 5px;
}

.gallery-item:hover .gallery-img {
    filter: brightness(1.05);
    transform: scale(1.02);
}

/* 模态框样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 1000px;
    max-height: 90vh;
    background-color: transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.close-modal {
    position: absolute;
    top: -50px;
    right: 0;
    background: transparent;
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    transition: var(--transition);
    z-index: 1001;
}

.close-modal:hover {
    color: var(--accent-color);
    transform: scale(1.2);
}

.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
}

.nav-btn:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-50%) scale(1.1);
}

.prev-btn {
    left: 20px;
}

.next-btn {
    right: 20px;
}

.modal-image-container {
    width: 100%;
    height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 8px;
}

#modal-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.image-info {
    color: white;
    text-align: center;
    margin-top: 20px;
    width: 100%;
}

#image-caption {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

#image-counter {
    font-size: 1rem;
    opacity: 0.8;
}

/* 页脚样式 */
footer {
    background-color: var(--dark-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-top: auto;
}

footer p {
    margin-bottom: 0.5rem;
}

.contact {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* 工具类 */
.hidden {
    display: none !important;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .categories-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: 20px;
    }
    
    .gallery-container {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
    
    .header-text {
        text-align: center;
    }
    
    .logo img {
        width: 100px;
        height: 100px;
    }
    
    header h1 {
        font-size: 2.2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .categories-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: 15px;
    }
    
    .category-card {
        height: 250px;
    }
    
    .gallery-container {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 15px;
    }
    
    .gallery-item {
        height: 180px;
    }
    
    .modal-image-container {
        height: 60vh;
    }
    
    .nav-btn {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
}

@media (max-width: 576px) {
    .categories-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
    
    .category-card {
        height: 220px;
    }
    
    .gallery-container {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
    
    .gallery-item {
        height: 160px;
    }
    
    .gallery-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    #gallery-title {
        font-size: 1.8rem;
    }
    
    .modal-content {
        width: 95%;
    }
    
    .modal-image-container {
        height: 50vh;
    }
    
    .prev-btn {
        left: 10px;
    }
    
    .next-btn {
        right: 10px;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 50px;
    height: 50px;
    border: 3px solid rgba(26, 82, 118, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}