body {
    background: #fff;
}
/* 顶部Banner + 锚点子导航 */
.top-banner {
    width: 100%;
    height: 32vw;
    text-align: center;
    background: #222;
    margin-top: 5.3vw;
    position: relative;
}
.about-anchor-nav {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    background: #fff;
    border-radius: 0.5vw 0.5vw 0 0;
    overflow: hidden;
}
.anchor-item {
    padding: 1vw 2vw;
    font-size: 1.05vw;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.3s;
}
.anchor-item.active {
    color: #e62e2e;
    border-bottom: 0.1vw solid #e62e2e;
}

/* 通用容器 */
.wrap {width: 66.77vw;margin: 0 auto;padding: 2vw 0;}
.sec-title {
    text-align: center;
    font-size: 1.125vw;
    font-weight: bold;
    margin-bottom: 0.6vw;
}
.sec-en {
    text-align: center;
    font-size: 1.05vw;
    color: #e62e2e;
    margin-bottom: 2.5vw;
}

/* 公司简介 */
#intro {background: #fff;}
.intro-text {
    font-size: 1.05vw;
    color: #666;
    text-align: center;
    margin-bottom: 3vw;
}
.intro-img {
    width: 100%;
    height: 38vw;
    /*background: #eee;*/
    border-radius: 0.6vw;
}

.intro-img>img {
    display: block;
    width: 100%;
}

/* 发展历程 */
#history {background: #f8f9fa;}
.timeline {
    display: flex;
    justify-content: space-between;
    position: relative;
    margin: 3vw 0;
}
.timeline::before {
    content: '';
    position: absolute;
    top: 0.4vw;
    left: 0;
    width: 100%;
    height: 0.105vw;
    background: #ddd;
    z-index: 1;
}
.timeline-year {
    position: relative;
    z-index: 2;
    text-align: center;
}
.timeline-year::before {
    content: '';
    width: 0.7vw;
    height: 0.7vw;
    border-radius: 50%;
    background: #fff;
    border: 0.1vw solid #ccc;
    display: block;
    margin: 0 auto 0.7vw;;
}
.timeline-year.active::before {
    background: #e62e2e;
    border-color: #e62e2e;
}
.history-card-list {
    display: flex;
    gap: 2.3vw;
}
.history-card {
    flex: 1;
    background: #fff;
    padding: 1.9vw;
    border-radius: 0.6vw;
    box-shadow: 0 0.1vw 0.7vw rgba(0,0,0,0.05);
}
.history-card h3 {
    font-size: 1.125vw;
    margin-bottom: 1.4vw;
    color: #e62e2e;
}
.history-card p {
    font-size: 1.125vw;
    color: #666;
    text-align: justify;
}

/* 品牌文化 */
#culture {background: #fff;}
.culture-item {
    margin-bottom: 2.5vw;
}
.culture-item h4 {
    font-size: 1.125vw;
    border-left: 0.3vw solid #e62e2e;
    padding-left: 0.9vw;
    margin-bottom: 0.9vw;
}
.culture-item p {
    font-size: 1.05vw;
    color: #666;
    margin-bottom: 1.4vw;
}
.culture-img {
    width: 100%;
    height: 19.5vw;
    background: #eee;
    border-radius: 0.6vw;
}

/* 品牌特色 + 右侧小轮播 */
#feature {background: #f8f9fa;}
.feature-box {
    display: flex;
    gap: 3.75vw;
    align-items: center;
}
.feature-left {flex: 1;}
.feature-tab-wrap {
    display: flex;
    gap: 2.25vw;
    margin-bottom: 1.875vw;
}
.feature-tab {
    font-size: 1.05vw;
    padding-bottom: 0.45vw;
    border-bottom: 0.15vw solid transparent;
    cursor: pointer;
}
.feature-tab.active {
    color: #e62e2e;
    border-color: #e62e2e;
}
.feature-content p {
    font-size: 1.05vw;
    color: #666;
    margin-bottom: 0.75vw;
}

/* 右侧小轮播容器 */
.feature-swiper {
    width: 24vw;
    height: 27vw;
    position: relative;
    overflow: hidden;
    border-radius: 0.6vw;
}
.swiper-list {
    width: 100%;
    height: 100%;
    position: relative;
}
.swiper-item {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    opacity: 0;
    transition: opacity 0.6s;
    background: #eee;
}
.swiper-item.active {opacity: 1;}
.swiper-dots {
    position: absolute;
    bottom: 1.125vw;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 1.125vw;
}
.swiper-dots span {
    width: 0.6vw;
    height: 0.6vw;
    border-radius: 50%;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
}
.swiper-dots span.active {background: #fff;}

/* 商务合作 */
#cooper {background: #fff;}
.cooper-card {
    width: 24vw;
    margin: 0 auto;
    padding: 2.25vw;
    background: #fff;
    box-shadow: 0 0.15vw 1.125vw rgba(0,0,0,0.08);
    border-radius: 0.6vw;
    text-align: center;
}
.cooper-card h4 {
    font-size: 1.2vw;
    color: #e62e2e;
    margin-bottom: 1.125vw;
}
.cooper-card p {
    font-size: 1.05vw;
    color: #666;
    line-height: 2;
}