/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 微软雅黑, sans-serif;
}

/* 头部 */
.head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 5%;
    background: #fff;
    box-shadow: 0 2px 5px #eee;
}

.logo {
    height: 50px;
}

/* 导航条 - 居中 + 浅蓝色 + 鼠标变深 */
.nav {
    background: #d1e7ff;
}

.nav ul {
    display: flex;
    list-style: none;
    max-width: 1200px;
    margin: 0 auto;
    justify-content: center;
}

.nav a {
    color: #333;
    padding: 16px 30px;
    display: block;
    text-decoration: none;
    transition: all 0.3s;
}

.nav a:hover {
    background: #8ab4f8;
    color: #fff;
}
/* 轮播图样式 */
.banner {
    position: relative;
    width: 100%;
    height: 500px;
    overflow: hidden;
}
.banner img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 1s ease;
}
.banner img.active {
    opacity: 1;
}
/* 通用内容区块 */
.box {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 0;
}

.title {
    text-align: center;
    margin-bottom: 30px;
    font-size: 24px;
}

.flex {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.item {
    flex: 1;
    min-width: 250px;
    text-align: center;
}

.item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    margin-bottom: 10px;
}

/* 底部 */
.foot {
    background: #222;
    color: #fff;
    padding: 30px 5%;
    text-align: center;
}

.foot a {
    color: #fff;
    margin: 0 10px;
    text-decoration: none;
}

/* ========== 🔥 企业介绍 · 大气高端版 ========== */
#about {
    background: #fff;
    padding: 80px 20px;
    position: relative;
}
#about .title {
    text-align: center;
    font-size: 42px;
    font-weight: 700;
    color: #1a5c36;
    margin-bottom: 50px;
    letter-spacing: 2px;
    position: relative;
}
#about .title::after {
    content: '';
    width: 80px;
    height: 5px;
    background: #2d9066;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: -18px;
    border-radius: 5px;
}
#about > div:nth-child(2) {
    max-width: 1000px;
    margin: 0 auto;
    font-size: 18px;
    line-height: 2.2;
    color: #333;
    text-align: justify;
    background: #ffffff;
    padding: 50px 60px;
    border-radius: 20px;
    box-shadow: 0 15px 40px rgba(0, 50, 20, 0.07);
    border-left: 6px solid #2d9066;
}