/* 定义CSS变量 */
:root {
    --custom-text-size0: 0.5rem;
    --custom-text-size1: 0.22rem;
    --custom-line-height-15: 1.5;
}

/* 全局样式 */
.quality_first {
    width: 100%;
    overflow: hidden;
}

.pc-pad {
    display: block;
}

.mb-only {
    display: none;
}

/* 通用部分样式 */
.quality_first section {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 80%;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}
.quality_first .part2{
   height: calc(100vh - 0.75rem);
}
/* 背景图片样式 */
.quality_first .bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

/* 内容容器样式 */
.quality_first .content {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 80%;
    /* padding: 0 2rem; */
    color: #fff;
    text-align: center;
}

/* 通用标题样式 */
.quality_first .title-large {
    font-size: var(--custom-text-size0);
    font-weight: bold;
    margin-bottom: 0.42rem;
    text-transform: uppercase;
    /* letter-spacing: 2px; */
}

/* 通用文本样式 */
.quality_first .text-small {
    font-size: var(--custom-text-size1);
    line-height: var(--custom-line-height-15);
    text-align: justify;
    /* max-width: 800px; */
    margin: 0 auto;
}

/* 文本容器样式 */
.quality_first .text-container {
    /* max-width: 800px; */
    margin: 0 auto;
    text-align: left;
    /* padding-left: 2rem; */
}

/* 文本项样式 */
.quality_first .text-item {
    /* margin-bottom: .1rem; */
    display: flex;

}

.quality_first .text-icon {
    font-size: var(--custom-text-size0);
    /* font-weight: bold; */
    margin-right: 0.1rem;
}



.quality_first .text-item p {
    font-size: var(--custom-text-size1);
    line-height: var(--custom-line-height-15);
}

/* 统计数据样式 */
.quality_first .stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.quality_first .stat-item {
    text-align: center;
}

.quality_first .number {
    font-size: var(--custom-text-size0);
    font-weight: bold;
    margin-bottom: .14rem;
}

.quality_first .label {
    font-size: var(--custom-text-size1);
    line-height: var(--custom-line-height-15);
}

/* 发动机图片样式 */
.quality_first .engine-image {
    max-width: 400px;
    margin-top: 2rem;
}

/* .part0 PC版样式调整 */

.quality_first .part0 {
    justify-content: flex-end;
}

.quality_first .part0 .content {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    text-align: left;
    width: 50%;
    max-width: 7rem;
    padding: 0 0.98rem;
    background: none;
}

.quality_first .part0 .title-large {
    font-size: var(--custom-text-size0);
    margin-bottom: 0.18rem;
    text-align: center;
    text-transform: uppercase;
    background: none;
}

.quality_first .part0 .text-small {
    font-size: var(--custom-text-size1);
    text-align: justify;
    line-height: var(--custom-line-height-15);
}

/* Part1 - Achievements Section */
.quality_first .part1 .content {
    width: 100%;
    max-width: 90%;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.quality_first .part1 .achievements-container {
    display: flex;
    justify-content: space-around;
    align-items: flex-start;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.quality_first .part1 .achievement-item {
    flex: 1;
    min-width: 2.5rem;
    max-width: 4rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.quality_first .part1 .achievement-icon {
    width: 100%;
    margin-bottom: 0.4rem;
}

.quality_first .part1 .achievement-icon img {
    width: 3.48rem;
    height: auto;
    object-fit: contain;
}

.quality_first .part1 .achievement-text {
    font-size: var(--custom-text-size1);
    line-height: var(--custom-line-height-15);
    text-align: left;
    position: relative;
}
.quality_first .part1 .achievement-text::after{
  position: absolute;
  content: '';
  display: block;
  right: -0.78rem;
  top:-0.1rem;
  height: 2rem;
  width: 1px;
  background: #fff;
}
.quality_first .part1 .achievement-item:last-child .achievement-text::after{
  display: none;
}

.quality_first .part1 .achievement-text p {
    margin: 0;
}

/* Part2 - Supplier & Dealer Section */
.quality_first .part2 .content {
    position: absolute;
    left: 0;
    top: 0;
    width: 50%;
    max-width: 8rem;
    padding: 0 0.98rem;
    background-color: rgba(104, 83, 60, 0.6);
    display: flex;
    height: 100%;
    align-items: center;
}

.quality_first .part2 .stats-container {
    display: flex;
    margin-bottom: 1.04rem;
}

.quality_first .part2 .stat-block {
    text-align: left;
    width: 50%;
}

.quality_first .part2 .stat-title {
    font-size: var(--custom-text-size1);
    font-weight: bold;
    /* margin-bottom: 0.1rem; */
    text-align: center;
}
.quality_first .part2 .stat-title b {
    font-size: var(--custom-text-size0);
    font-weight: bold;
}

.quality_first .part2 .stat-subtitle {
    font-size: var(--custom-text-size1);
    line-height: var(--custom-line-height-15);
    text-align: center;
}

.quality_first .part2 .text-container {
    width: 100%;
    margin: 0;
    padding: 0;
}

.quality_first .part2 .text-container .text-item {
    margin-bottom: 0.2rem;
}

.quality_first .part2 .text-container p {
    padding-bottom: 0.32rem;
}
.quality_first .part3 .content{
    width: 8.1rem;
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
}
.quality_first .part3 .stats{
    justify-content: left;
}
.quality_first .part3 .text-container{
   width: 80%;
   margin:0;
}
.quality_first .part3 .text-container p{
    padding-bottom: 0.32rem;
}
/* 动画效果 - 仅保留过渡类，移除初始隐藏状态 */
.fade-in {
    /* 移除初始隐藏状态，让元素默认显示 */
    opacity: 1;
    transform: translateY(0);
}

/* 保留transition类但不再使用它们 */
.delay-1, .delay-2 {
    /* 这些类现在不产生任何效果，但保留以避免引用错误 */
    display: block;
}

/* 整合的响应式设计 - 移动设备样式 */
@media (max-width: 768px) {

    /* .part0 手机版样式 */
    .quality_first section {
        width: 100%;
        height: auto;
        min-height: 100vh;
    }

    .quality_first .stats {
        flex-direction: column;
        /* gap: 2rem; */
    }

    .quality_first .number,
    .quality_first .number.decimal {
        font-size: var(--custom-text-size0)
    }

    .quality_first .text-container {
        padding-left: 0;
    }

    .quality_first .engine-image {
        max-width: 250px;
    }

    .quality_first .part0 {
        flex-direction: column;
        justify-content: flex-end;
        height: 15rem;
        background-color: black;
    }
    .quality_first .part0 .bg{
        height: auto;

    }

    .quality_first .part0 .content {
        width: 100%;
        max-width: 90%;
        left: 50%;
        right: auto;
        top: auto;
        bottom: 0.3rem;
        transform: translateX(-50%);
        padding: 0 0.5rem;
    }
    .quality_first .part1 .content {
        width: 100%;
        max-width: 90%;
        left: 50%;
        right: auto;
        transform: translate(-50%, -50%);
    }

    .quality_first .part1 .achievements-container {
        flex-direction: column;
        align-items: center;
        gap: 0.4rem;
    }

    .quality_first .part1 .achievement-item {
        max-width: 100%;
        width: 100%;
    }

    .quality_first .part2 .content {
        width: 100%;
        max-width: 90%;
        left: 50%;
        top: -20%;
        right: auto;
        transform: translateX(-50%);
        padding: 0 0.5rem;
        background: transparent;
    }

    .quality_first .part2 .stats-container {
        margin-bottom: 0.3rem;
    }

    .quality_first .part2 .text-container {
        padding: 0;
    }

    .quality_first .part3 .stats {
        flex-direction: row;
        justify-content: center;
    }
.quality_first .part3 .content{
    width: 100%;
    left: 50%;
    top: 7.5rem;
    right: auto;
    transform: translateX(-50%);
}
.quality_first .part3 .text-container{
    width: 100%;
}

    /* 通用响应式样式 */



    /* 显示/隐藏不同设备的图片 */
    .pc-pad {
        display: none;
    }

    .mb-only {
        display: block;
    }
}

/* 非移动设备默认显示/隐藏样式 */