/* ==================== 首页样式 ==================== */

/* ==================== Banner轮播区 ==================== */
.banner {
    width: 100%;
    aspect-ratio: 16 / 9;
    position: relative;
    overflow: hidden;
}

.banner-slider {
    width: 100%;
    height: 100%;
    position: relative;
}

.banner-item {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    display: none;
}

.banner-item.active {
    display: block;
    position: relative;
}

.banner-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.banner-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    pointer-events: none;
}

/* 悬浮固定层 */
.banner-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10;
    pointer-events: none;
    width: clamp(200px, 19.44vw, 280px);
    max-width: 90vw;
}

.banner-overlay img {
    width: 100%;
    height: auto;
    max-width: 280px;
    max-height: 74px;
}

/* 切换指示器 */
.banner-indicators {
    position: absolute;
    bottom: clamp(16px, 1.94vw, 28px);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: clamp(8px, 0.83vw, 12px);
    z-index: 20;
}

.indicator {
    width: clamp(32px, 3.33vw, 48px);
    height: clamp(2px, 0.21vw, 3px);
    background-color: #ffffff;
    opacity: 0.2;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.indicator.active {
    opacity: 1;
}

.indicator:hover {
    opacity: 0.6;
}

/* ==================== 企业文化块 ==================== */
.culture {
    width: 100%;
    background-color: #f6f6f6;
    padding: clamp(40px, 4.44vw, 64px) 0;
    scroll-margin-top: clamp(60px, 5vw, 72px);
}

.culture-container {
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 clamp(20px, 5.14vw, 74px);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: clamp(30px, 4.17vw, 60px);
    min-height: clamp(400px, 44.44vw, 640px);
}

/* 左侧内容 */
.culture-left {
    flex: 1;
    min-width: clamp(300px, 35vw, 500px);
    display: flex;
    flex-direction: column;
    gap: clamp(30px, 2.78vw, 40px);
    justify-content: space-between;
}

.culture-header {
    display: flex;
    flex-direction: column;
    gap: clamp(8px, 0.83vw, 12px);
    width: 100%;
}

.culture-title {
    font-size: clamp(32px, 3.33vw, 48px);
    font-weight: 200;
    color: #666666;
    line-height: 1.33;
}

.culture-desc {
    font-size: clamp(16px, 1.39vw, 20px);
    color: #666666;
    line-height: 1.35;
}

/* 幻灯片大图 */
.culture-slide {
    width: 100%;
    max-width: clamp(350px, 38.54vw, 555px);
    aspect-ratio: 555 / 318;
    position: relative;
    overflow: hidden;
}

.slide-item {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
}

.slide-item.active {
    opacity: 1;
}

.slide-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slide-content {
    position: absolute;
    width: 100%;
    bottom: 0;
    left: 0;
    padding: clamp(16px, 1.94vw, 24px) clamp(25px, 2.57vw, 37px);
    display: flex;
    flex-direction: column;
    gap: clamp(6px, 0.56vw, 8px);
}

.slide-title {
    font-size: clamp(18px, 1.67vw, 24px);
    font-weight: 600;
    color: #000000;
    line-height: 1.33;
}

.slide-desc {
    font-size: clamp(14px, 1.11vw, 16px);
    color: #000000;
    line-height: 1.31;
    max-width: 90%;
}

/* 右侧田字块 */
.culture-right {
    flex: 1;
    min-width: clamp(300px, 35vw, 500px);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 当屏幕宽度小于900px时（换行后），左侧内容居中 */
@media (max-width: 900px) {
    .culture-left {
        align-items: center;
    }
    
    /* 换行后恢复正方形，避免高度过高 */
    .culture-grid {
        height: auto;
        aspect-ratio: 1;
    }
}

.culture-grid {
    width: 100%;
    max-width: clamp(350px, 44.44vw, 640px);
    height: 100%;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 0;
}

.grid-item {
    display: flex;
    flex-direction: column;
    gap: clamp(6px, 0.56vw, 8px);
    position: relative;
    padding: 0 0 clamp(20px, 2.08vw, 30px) clamp(25px, 2.92vw, 42px);
    justify-content: flex-end;
}

/* 使用伪元素绘制边框，不受opacity影响 */
.grid-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background-color: #CBCBCB;
}

/* 右侧第1个和第3个li添加右边框（中间竖线） */
.grid-item:nth-child(1)::after,
.grid-item:nth-child(3)::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 1px;
    background-color: #CBCBCB;
}

/* 后两个li（第3和第4个）取消底部padding，与底部对齐 */
.grid-item:nth-child(3),
.grid-item:nth-child(4) {
    padding-bottom: 0;
}

/* 内容区域的淡入淡出 */
.grid-item .grid-title,
.grid-item .grid-desc {
    opacity: 1;
    transition: opacity 0.8s ease-in-out;
}

.grid-item.fade-out .grid-title,
.grid-item.fade-out .grid-desc {
    opacity: 0;
}

.grid-title {
    font-size: clamp(18px, 1.67vw, 24px);
    font-weight: 600;
    color: #000000;
    line-height: 1.33;
}

.grid-desc {
    font-size: clamp(12px, 1.11vw, 16px);
    color: #666666;
    line-height: 1.31;
    height: calc(clamp(12px, 1.11vw, 16px) * 1.31 * 2);
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* ==================== 联系我们块 ==================== */
.contact {
    width: 100%;
    background-image: url('../images/contact_us_bg_01.jpg');
    background-size: 100% 100%;
    background-position: bottom center;
    background-repeat: no-repeat;
    padding: clamp(40px, 5vw, 72px) 0 clamp(50px, 5.56vw, 80px);
}

.contact-container {
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 clamp(20px, 5vw, 72px);
}

.contact-title {
    font-size: clamp(32px, 3.33vw, 48px);
    font-weight: 200;
    color: #666666;
    line-height: 1.33;
    margin-bottom: clamp(60px, 9.03vw, 130px);
}

.contact-content {
    display: flex;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: clamp(40px, 5.56vw, 80px);
    position: relative;
}

.contact-divider {
    width: 1px;
    height: clamp(80px, 8.33vw, 120px);
    background-color: #CBCBCB;
    flex-shrink: 0;
}

/* 当容器宽度小于800px时隐藏分隔线（内容换行时） */
@media (max-width: 800px) {
    .contact-divider {
        display: none;
    }
}

.contact-item {
    flex: 1;
    min-width: clamp(200px, 25vw, 300px);
    display: flex;
    flex-direction: column;
    gap: clamp(12px, 1.11vw, 16px);
    margin-left: clamp(40px, 11.8vw, 170px);
}

.contact-subtitle {
    font-size: clamp(18px, 1.67vw, 24px);
    font-weight: 600;
    color: #000000;
    line-height: 1.33;
    margin-bottom: clamp(6px, 0.56vw, 8px);
}

.contact-email,
.contact-phone {
    font-size: clamp(16px, 1.39vw, 20px);
    font-weight: 400;
    color: #000000;
    line-height: 1.35;
    display: flex;
    align-items: center;
}

.copy-icon {
    width: clamp(20px, 1.67vw, 24px);
    height: clamp(20px, 1.67vw, 24px);
    margin-left: clamp(12px, 1.11vw, 16px);
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.copy-icon:hover {
    opacity: 0.7;
}

/* 复制成功提示 */
.copy-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: #ffffff;
    padding: clamp(10px, 0.83vw, 12px) clamp(18px, 1.67vw, 24px);
    border-radius: clamp(3px, 0.28vw, 4px);
    font-size: clamp(12px, 0.97vw, 14px);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 10000;
    pointer-events: none;
}

.copy-toast.show {
    opacity: 1;
}