* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', 'Segoe UI', Arial, sans-serif;
}

body {
    background: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

/* 顶部导航栏 */
header {
    background: linear-gradient(135deg, #1e88e5 0%, #43a047 100%);
    padding: 20px 5%;
    box-shadow: 0 4px 15px rgba(30, 136, 229, 0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 15px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo-img {
    width: 60px;
    height: 60px;
    object-fit: contain;
    background: white;
    border-radius: 12px;
    padding: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.logo-img:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.logo-text {
    display: flex;
    flex-direction: column;
    color: white;
}

.logo-title {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: 2px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
    line-height: 1.2;
}

.logo-subtitle {
    font-size: 0.85rem;
    font-weight: 400;
    opacity: 0.95;
    letter-spacing: 1px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

/* 主要内容区 */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    padding-top: 40px;
}

/* 介绍区域 */
.intro-section {
    background: white;
    border-radius: 15px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    text-align: center;
}

.intro-section h1 {
    font-size: 2.5rem;
    color: #1e88e5;
    margin-bottom: 20px;
    font-weight: 700;
}

.intro-section p {
    font-size: 1.1rem;
    color: #555;
    line-height: 1.8;
    max-width: 900px;
    margin: 0 auto 30px;
}

.highlight {
    color: #43a047;
    font-weight: 600;
}

.intro-btn {
    display: inline-block;
    background: linear-gradient(135deg, #1e88e5 0%, #43a047 100%);
    color: white;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

.intro-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(30, 136, 229, 0.3);
}

/* 两大板块 */
.sections-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

.section-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.section-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.15);
}

.section-card.blue {
    border-top: 5px solid #1e88e5;
}

.section-card.green {
    border-top: 5px solid #43a047;
}

.section-header {
    padding: 25px 30px;
    text-align: center;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.section-card.blue .section-header {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
}

.section-card.green .section-header {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
}

.section-header h2 {
    font-size: 2rem;
    margin-bottom: 8px;
}

.section-card.blue .section-header h2 {
    color: #1565c0;
}

.section-card.green .section-header h2 {
    color: #2e7d32;
}

.section-header p {
    color: #666;
    font-size: 0.95rem;
}

.section-content {
    padding: 25px 30px;
}

.section-btn {
    display: inline-block;
    width: 100%;
    background: #1e88e5;
    color: white;
    padding: 12px;
    text-align: center;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    margin-bottom: 20px;
    transition: background 0.3s;
}

.section-card.green .section-btn {
    background: #43a047;
}

.section-btn:hover {
    opacity: 0.9;
}

.exhibitions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.exhibition-item {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.exhibition-item:hover {
    background: #e3f2fd;
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.section-card.green .exhibition-item:hover {
    background: #e8f5e9;
}

.exhibition-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 15px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.section-card.blue .exhibition-icon {
    color: #1e88e5;
}

.section-card.green .exhibition-icon {
    color: #43a047;
}

.exhibition-item h4 {
    font-size: 1rem;
    color: #333;
    font-weight: 600;
}

/* 平台链接区 */
.platform-section {
    background: linear-gradient(135deg, #1e88e5 0%, #43a047 100%);
    border-radius: 15px;
    padding: 30px;
    text-align: center;
    margin-bottom: 40px;
    box-shadow: 0 10px 30px rgba(30, 136, 229, 0.2);
}

.platform-section h3 {
    color: white;
    font-size: 1.8rem;
    margin-bottom: 15px;
}

.platform-section p {
    color: rgba(255,255,255,0.9);
    margin-bottom: 20px;
}

.platform-btn {
    display: inline-block;
    background: white;
    color: #1e88e5;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s, box-shadow 0.3s;
}

.platform-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

/* 页脚 */
footer {
    background: #2c3e50;
    color: #ecf0f1;
    text-align: center;
    padding: 30px 20px;
}

.copyright {
    color: #8a9ba8;
    font-size: 0.95rem;
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

footer a {
    color: #3498db;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .sections-container {
        grid-template-columns: 1fr;
    }
    .exhibitions {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    /* 顶部导航栏 */
    header {
        padding: 15px 4%;
    }

    .logo-container {
        gap: 12px;
    }

    .logo-img {
        width: 50px;
        height: 50px;
        padding: 6px;
    }

    .logo-title {
        font-size: 1.4rem;
        letter-spacing: 1.5px;
    }

    .logo-subtitle {
        font-size: 0.75rem;
        letter-spacing: 0.8px;
    }

    /* 主内容区 */
    .main-content {
        padding: 20px 15px;
    }

    /* 介绍区域 */
    .intro-section {
        padding: 25px 20px;
        margin-bottom: 25px;
    }
    .intro-section h1 {
        font-size: 1.8rem;
        line-height: 1.3;
        margin-bottom: 15px;
    }
    .intro-section p {
        font-size: 1rem;
        margin-bottom: 20px;
    }

    /* 两大板块容器 */
    .sections-container {
        gap: 20px;
        margin-bottom: 25px;
    }

    /* 卡片头部 */
    .section-header {
        padding: 20px 15px;
    }
    .section-header h2 {
        font-size: 1.25rem;
        line-height: 1.4;
        margin-bottom: 5px;
        word-break: keep-all;
        overflow-wrap: break-word;
    }

    /* 卡片内容区 */
    .section-content {
        padding: 20px 15px;
    }

    /* 进入官网按钮 */
    .section-btn {
        padding: 10px;
        font-size: 0.95rem;
        margin-bottom: 15px;
    }

    /* 展览项网格 */
    .exhibitions {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    /* 单个展览项 */
    .exhibition-item {
        padding: 15px;
        display: flex;
        align-items: center;
        text-align: left;
        gap: 12px;
    }

    /* 展览项图标 */
    .exhibition-icon {
        width: 45px;
        height: 45px;
        margin: 0;
        font-size: 1.2rem;
        flex-shrink: 0;
    }

    /* 展览项文字 */
    .exhibition-item h4 {
        font-size: 0.9rem;
        line-height: 1.3;
        flex: 1;
    }

    /* 平台区域 */
    .platform-section {
        padding: 25px 20px;
        margin-bottom: 25px;
    }
    .platform-section h3 {
        font-size: 1.5rem;
        margin-bottom: 12px;
    }
    .platform-section p {
        font-size: 0.95rem;
        margin-bottom: 15px;
    }

    /* 页脚 */
    footer {
        padding: 25px 20px;
    }
    .copyright {
        font-size: 0.85rem;
    }
}