html { font-size: 16px; }
body { margin: 0; font-family: 'Microsoft YaHei', Arial, sans-serif; background: #f7f9fa; }

/* Banner轮播 */
#panel-banner{
    overflow: hidden;
}
.banner-swiper { 
    width: 100vw; 
    height: 48rem; 
    min-height: 400px; 
    position: relative; 
    overflow: hidden;
}
.banner-img { 
    width: 100%; 
    height: 100%; 
    object-fit: cover; 
}
.banner-caption {
    position: absolute; 
    left: 10%; 
    top: 40%;
    color: #fff; 
    font-size: 2.2rem; 
    font-weight: bold;
    text-shadow: 0 2px 16px rgba(0,0,0,0.3);
    letter-spacing: 0.1em;
}

/* 新闻区 */
.news-header {
    text-align: center;
    padding: 2rem 1rem;
}
.index-news { 
    justify-content: space-evenly;
    padding: 1rem 2rem;
    display: flex;
    gap: 1rem;
    max-width: 1400px;
    margin: 0 auto;
}

.news-left{
    width: 40rem;
    flex: 1;
}
.news-right { 
    min-width: 34rem;
    flex: 1;
}

/* 右侧新闻列表头部 */
.news-right-header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 1rem;
}

.news-more-link {
    color: #1a237e;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.news-more-link:hover {
    color: #ffd700;
    transform: translateX(3px);
}

.news-more-link:active {
    transform: translateX(0);
}

/* 新闻区优化 */
.news-section-title {
    font-size: 2rem;
    font-weight: bold;
    color: #1a237e;
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}
.news-section-subtitle {
    font-size: 1.1rem;
    color: #888;
    margin-bottom: 1rem;
    font-family: 'Arial', sans-serif;
    letter-spacing: 0.04em;
}
.news-section-divider {
    width: 3rem;
    height: 4px;
    background: #ffd700;
    border-radius: 2px;
    margin: 0 auto;
}

/* 左侧轮播样式 */
.news-swiper-left {
    width: 100%;
    height: 28rem;
}

.news-left-img-box {
    position: relative;
    width: 100%;
    height: 18rem;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.news-left-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.news-left-mask {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(0,0,0,0.25) 60%, rgba(0,0,0,0.5) 100%);
    pointer-events: none;
}

.news-left-caption {
    padding: 1.5rem 0;
}

.news-left-caption h3 {
    font-size: 1.4rem;
    margin: 0 0 0.8rem 0;
    color: #1a237e;
    line-height: 1.4;
}

.news-left-caption p {
    color: #555;
    font-size: 1.1rem;
    margin: 0;
    line-height: 1.6;
}

/* 右侧列表样式 */
.news-list-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid #f0f0f0;
    transition: all 0.2s;
    cursor: pointer;
}

.news-list-item:last-child { 
    border-bottom: none; 
}

.news-list-item:hover {
    background: #f5f7fa;
    transform: translateX(5px);
    padding-left: 0.5rem;
}

.news-list-item:hover .news-title {
    color: #1a237e;
}

.news-title {
    flex: 1;
    font-size: 1.1rem;
    text-decoration: none;
    color: #222;
    margin-right: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.news-date {
    color: #888;
    font-size: 0.9rem;
    margin: 0 1rem;
}

.news-list-arrow {
    color: #ffd700;
    font-size: 1.2rem;
    transition: transform 0.2s;
}

.news-list-item:hover .news-list-arrow {
    transform: translateX(5px);
}

/* 专题专栏 */
.special-topics { 
    background: #fff; 
    padding: 2rem 0; 
    text-align: center; 
}
.special-topics h2 { 
    font-size: 2rem; 
    margin-bottom: 1.5rem; 
}
.topics-grid { 
    display: flex; 
    flex-wrap: wrap; 
    gap: 1.5rem; 
    justify-content: center; 
}
.topic-card { 
    width: 14rem; 
    background: #f5f7fa; 
    border-radius: 1rem; 
    overflow: hidden; 
    box-shadow: 0 2px 8px rgba(0,0,0,0.04); 
}
.topic-card img { 
    width: 100%; 
    height: 8rem; 
    object-fit: cover; 
}
.topic-title { 
    padding: 1rem; 
    font-size: 1.1rem; 
    font-weight: bold; 
    color: #1a237e; 
}

/* 集团宣传片 */
.group-video {  
    color: #fff; 
    text-align: center; 
}
.video-title { 
    font-size: 2rem; 
    font-weight: bold; 
    margin-bottom: 1rem; 
}
.video-box { 
    position: relative; 
    display: inline-block; 
}
.video-cover { 
    width: 32rem; 
    border-radius: 1rem; 
}
.video-play-btn {
    position: absolute; 
    left: 50%; 
    top: 50%; 
    transform: translate(-50%,-50%);
    width: 4rem; 
    height: 4rem; 
    background: url('play-btn.png') no-repeat center/cover; 
    cursor: pointer;
}

/* Swiper自定义 */
.swiper-pagination-bullet { 
    background: rgba(255,255,255,0.7); 
    width: 16px; 
    height: 16px; 
    opacity: 1; 
    margin: 0 6px !important; 
}
.swiper-pagination-bullet-active { 
    background: #ffd700; 
}
.swiper-button-next, .swiper-button-prev {
    color: #ffd700; 
    width: 48px; 
    height: 48px; 
    background: rgba(255,255,255,0.7);
    border-radius: 50%; 
    top: 50%; 
    transform: translateY(-50%);
}
.swiper-button-next:after, .swiper-button-prev:after { 
    font-size: 28px; 
    font-weight: bold; 
}

/* 响应式调整 */
@media (max-width: 1002px) {
    .banner-swiper {
        height: 40rem;
    }
    
    .banner-caption {
        font-size: 2rem;
    }
    
    .index-news {
        padding: 1rem;
        flex-direction: column;
        gap: 2rem;
    }
    
    .news-left, .news-right { 
        width: 100%; 
        min-width: auto;
    }
    
    .news-swiper-left { 
        height: 26rem; 
    }
    
    .news-left-img-box { 
        height: 16rem; 
    }
    
    .news-left-caption h3 { 
        font-size: 1.3rem; 
    }
    
    .news-left-caption p { 
        font-size: 1rem; 
    }
    
    .news-more-link { 
        font-size: 0.95rem; 
    }
    
    .video-cover {
        width: 100%;
        max-width: 32rem;
    }

    /* 移动端新闻列表样式优化 */
    .news-list-item {
        padding: 1.2rem 0;
    }

    .news-title {
        font-size: 1.1rem;
        line-height: 1.4;
        margin-right: 0.8rem;
    }

    .news-date {
        font-size: 0.9rem;
        white-space: nowrap;
    }
}

@media (max-width: 900px) {
    .banner-swiper {
        height: 32rem;
    }
    
    .banner-caption {
        font-size: 1.8rem;
        left: 5%;
    }
    
    .index-news { 
        padding: 1.5rem;
        gap: 2rem;
    }
    
    .news-swiper-left { 
        height: 24rem; 
    }
    
    .news-left-img-box { 
        height: 14rem; 
    }
    
    .news-left-caption h3 { 
        font-size: 1.2rem; 
    }
    
    .news-left-caption p { 
        font-size: 1rem; 
    }
    
    .news-more-link { 
        font-size: 0.9rem; 
    }
    
    .video-cover {
        width: 100%;
        max-width: 32rem;
    }

    /* 移动端新闻列表样式优化 */
    .news-list-item {
        padding: 1.2rem 0;
    }

    .news-title {
        font-size: 1.1rem;
        line-height: 1.4;
        margin-right: 0.8rem;
    }

    .news-date {
        font-size: 0.9rem;
        white-space: nowrap;
    }
}

@media (max-width: 600px) {
    .banner-swiper {
        height: 24rem;
    }
    
    .banner-caption {
        font-size: 1.4rem;
        top: 50%;
        transform: translateY(-50%);
    }
    
    .index-news { 
        padding: 1rem; 
        gap: 1.5rem;
    }
    
    .news-swiper-left { 
        height: 20rem; 
    }
    
    .news-left-img-box { 
        height: 12rem; 
    }
    
    .news-left-caption h3 { 
        font-size: 1.1rem; 
    }
    
    .news-left-caption p { 
        font-size: 0.9rem; 
    }
    
    .news-title { 
        font-size: 1rem; 
    }
    
    .news-more-link { 
        font-size: 0.85rem; 
    }
    
    .news-section-title {
        font-size: 1.6rem;
    }
    
    .news-section-subtitle {
        font-size: 1rem;
    }
    
    .swiper-button-next, .swiper-button-prev {
        display: none;
    }
    
    .swiper-pagination-bullet {
        width: 12px;
        height: 12px;
        margin: 0 4px !important;
    }

    /* 移动端新闻列表进一步优化 */
    .news-list-item {
        padding: 1rem 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .news-title {
        width: 100%;
        margin-right: 0;
        margin-bottom: 0.3rem;
    }

    .news-date {
        font-size: 0.85rem;
        color: #666;
    }

    .news-list-arrow {
        display: none;
    }
}

@media (max-width: 400px) {
    .banner-swiper {
        height: 20rem;
    }
    
    .banner-caption {
        font-size: 1.2rem;
    }
    
    .news-swiper-left {
        height: 18rem;
    }
    
    .news-left-img-box {
        height: 10rem;
    }
    
    .news-left-caption h3 {
        font-size: 1rem;
    }
    
    .news-left-caption p {
        font-size: 0.85rem;
    }
    
    .news-title {
        font-size: 0.9rem;
    }
    
    .news-date {
        font-size: 0.8rem;
    }

    /* 小屏幕新闻列表最终优化 */
    .news-list-item {
        padding: 0.8rem 0;
    }

    .news-title {
        font-size: 0.9rem;
        line-height: 1.3;
    }

    .news-date {
        font-size: 0.75rem;
    }
}
/* 主要产品 */


/* 专题专栏 */
.special-topics { background: #fff; padding: 2rem 0; text-align: center; }
.special-topics h2 { font-size: 2rem; margin-bottom: 1.5rem; }
.topics-grid { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: center; }
.topic-card { width: 14rem; background: #f5f7fa; border-radius: 1rem; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.04); }
.topic-card img { width: 100%; height: 8rem; object-fit: cover; }
.topic-title { padding: 1rem; font-size: 1.1rem; font-weight: bold; color: #1a237e; }

/* 集团宣传片 */
.group-video {  color: #fff; text-align: center; }
.video-title { font-size: 2rem; font-weight: bold; margin-bottom: 1rem; }
.video-box { position: relative; display: inline-block; }
.video-cover { width: 32rem; border-radius: 1rem; }
.video-play-btn {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%);
  width: 4rem; height: 4rem; background: url('play-btn.png') no-repeat center/cover; cursor: pointer;
}

/* Swiper自定义 */
.swiper-pagination-bullet { background: rgba(255,255,255,0.7); width: 16px; height: 16px; opacity: 1; margin: 0 6px !important; }
.swiper-pagination-bullet-active { background: #ffd700; }
.swiper-button-next, .swiper-button-prev {
  color: #ffd700; width: 48px; height: 48px; background: rgba(255,255,255,0.7);
  border-radius: 50%; top: 50%; transform: translateY(-50%);
}
.swiper-button-next:after, .swiper-button-prev:after { font-size: 28px; font-weight: bold; }