/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", sans-serif;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

/* 顶部导航栏 */
.site-header {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    z-index: 99;
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}

.logo img {
    height: 36px;
}

.main-nav ul {
    display: flex;
    gap: 48px;
}

.main-nav a {
    font-size: 16px;
    color: #333;
    transition: color 0.25s ease;
}

.main-nav a:hover {
    color: #d81e06;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-switch {
    display: flex;
    align-items: center;
    font-size: 14px;
    color: #666;
}

.lang-switch a {
    margin: 0 8px;
}

.lang-switch a.active {
    color: #d81e06;
    font-weight: 600;
}

.search-icon {
    width: 20px;
    height: 20px;
    background: url('data:image/svg+xml;utf8,<svg viewBox="0 0 24 24" fill="%23333"><path d="M15.5 14h-.79l-.28-.27A6.471 6.471 0 0 0 16 9.5 6.5 6.5 0 0 0 9.5 3 6.5 6.5 0 0 0 3 9.5 6.5 6.5 0 0 0 9.5 16c1.61 0 3.09-.59 4.23-1.57l.27.28v.79l5 4.99L20.49 19l-4.99-5zm-6 0C7.01 14 5 11.99 5 9.5S7.01 5 9.5 5 14 7.01 14 9.5 11.99 14 9.5 14z"/></svg>') no-repeat center;
    background-size: contain;
    cursor: pointer;
}

/* 顶部大图区域 */
.hero-banner {
    position: relative;
    width: 100%;
    height: 500px;
    overflow: hidden;
}

.banner-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.tab-nav {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255,255,255,0.9);
    display: flex;
    justify-content: center;
    padding: 0 24px;
}

.tab-item {
    display: inline-block;
    padding: 16px 32px;
    font-size: 15px;
    color: #666;
    transition: all 0.25s ease;
    border-bottom: 2px solid transparent;
}

.tab-item.active {
    color: #d81e06;
    border-bottom-color: #d81e06;
    font-weight: 600;
}

.breadcrumb {
    position: absolute;
    bottom: 24px;
    right: 40px;
    font-size: 14px;
    color: #333;
}

.breadcrumb a {
    color: #666;
}

.breadcrumb span {
    margin: 0 6px;
}

/* 公司简介内容区 */
.about-content {
    max-width: 1400px;
    margin: 60px auto;
    padding: 0 24px;
}

.content-inner {
    width: 100%;
}

.section-title {
    margin-bottom: 32px;
}

.section-title h2 {
    font-size: 32px;
    color: #d81e06;
    font-weight: 700;
    margin-bottom: 8px;
}

.en-title {
    font-size: 18px;
    color: #666;
    font-weight: 500;
}

.intro-text {
    margin-bottom: 48px;
    font-size: 16px;
    color: #333;
    line-height: 1.8;
}

.intro-text p {
    margin-bottom: 12px;
    text-indent: 2em;
}

/* 数据统计区 */
.stats-row {
    display: flex;
    background-color: #f8f8f8;
    margin-bottom: 48px;
}

.stat-item {
    flex: 1;
    padding: 32px 16px;
    text-align: center;
    border-right: 1px solid #eee;
}

.stat-item:last-child {
    border-right: none;
}

.stat-item.highlight {
    background-color: #d81e06;
    color: #fff;
}

.stat-value {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 8px;
}

.stat-value span {
    font-size: 24px;
}

.stat-label {
    font-size: 14px;
    color: inherit;
}

/* 使命愿景区 */
.mission-row {
    display: flex;
    gap: 24px;
}

.mission-card {
    flex: 1;
    background-color: #f8f8f8;
    padding: 40px 24px;
    text-align: center;
    border-radius: 4px;
}

.mission-card .icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 24px;
}

.mission-card .icon svg {
    width: 100%;
    height: 100%;
    fill: #d81e06;
}

.mission-card h4 {
    font-size: 20px;
    color: #333;
    margin-bottom: 16px;
}

.mission-card p {
    font-size: 15px;
    color: #666;
}

/* 页脚 */
.site-footer {
    background-color: #222;
    color: #fff;
    padding: 40px 20px 20px;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-col {
    flex: 1;
    min-width: 200px;
}

.footer-col h5 {
    font-size: 16px;
    margin-bottom: 15px;
    color: #fff;
}

.footer-col p,
.footer-col a {
    font-size: 14px;
    color: #ccc;
    line-height: 1.6;
    text-decoration: none;
}

.footer-col a:hover {
    color: #fff;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-bottom {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #444;
    font-size: 13px;
    color: #999;
}

/* 响应式适配 */
@media (max-width: 900px) {
    .main-nav ul {
        gap: 24px;
        font-size: 14px;
    }
    .hero-banner {
        height: 320px;
    }
    .tab-item {
        padding: 12px 16px;
        font-size: 14px;
    }
    .stats-row {
        flex-wrap: wrap;
    }
    .stat-item {
        flex: 1 1 33.33%;
        border-bottom: 1px solid #eee;
    }
    .mission-row {
        flex-direction: column;
    }
}