/* 音创云图公司官网 - 主样式文件 */

/* ========== 全局重置和基础样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "微软雅黑", sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* ========== 容器和布局 ========== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 60px 0;
    background-color: #fff;
    margin-bottom: 20px;
}

.section-title {
    font-size: 2rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #C8102E, #E63946);
}

/* ========== 网格系统 ========== */
.grid {
    display: grid;
    gap: 20px;
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* ========== 卡片组件 ========== */
.card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-content {
    padding: 20px;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
}

.card-text {
    font-size: 0.95rem;
    color: #666;
    line-height: 1.6;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-block;
    padding: 10px 24px;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #C8102E, #E63946);
    color: #fff;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #A00D25, #C8102E);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(200, 16, 46, 0.3);
}

.btn-secondary {
    background: #f0f0f0;
    color: #333;
}

.btn-secondary:hover {
    background: #e0e0e0;
}

/* ========== 图片 ========== */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ========== 链接 ========== */
a {
    color: #C8102E;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #E63946;
}

/* ========== 列表 ========== */
ul, ol {
    list-style: none;
}

/* ========== 响应式布局 ========== */

/* 平板设备 (768px - 1024px) */
@media (max-width: 1024px) {
    .container {
        max-width: 960px;
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .section {
        padding: 40px 0;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
}

/* 移动设备 (最大 767px) */
@media (max-width: 767px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .section {
        padding: 30px 0;
        margin-bottom: 10px;
    }
    
    .section-title {
        font-size: 1.5rem;
        margin-bottom: 30px;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .card-image {
        height: 180px;
    }
}

/* 小型移动设备 (最大 480px) */
@media (max-width: 480px) {
    .section {
        padding: 20px 0;
    }
    
    .section-title {
        font-size: 1.25rem;
        margin-bottom: 20px;
    }
    
    .card-content {
        padding: 15px;
    }
    
    .btn {
        padding: 8px 20px;
        font-size: 0.9rem;
    }
}

/* ========== 工具类 ========== */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.mt-4 { margin-top: 40px; }

.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }
.mb-4 { margin-bottom: 40px; }

.p-1 { padding: 10px; }
.p-2 { padding: 20px; }
.p-3 { padding: 30px; }
.p-4 { padding: 40px; }

.d-none {
    display: none;
}

.d-block {
    display: block;
}

.d-flex {
    display: flex;
}

.justify-center {
    justify-content: center;
}

.align-center {
    align-items: center;
}

.flex-wrap {
    flex-wrap: wrap;
}