/* ============================================================
   Catalog 页面
   ============================================================ */
.catalog-main {
    background: #fff;
}

/* 首屏 Catalog banner（1920×600） */
.first {
    position: relative;
    width: 100%;
    max-width: 19.2rem;
    margin: 0 auto;
    background: #000;
    overflow: hidden;
}

.first__viewport {
    position: relative;
    width: 100%;
    padding-top: 31.25%;
    /* 1920 x 600 比例 */
}

.first__bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.first__content {
    position: absolute;
    top: 3.91rem;
    left: 3.1rem;
    z-index: 2;
    color: #fff;
}

.first__title {
    color: #FFF;
    font-family: Gabarito;
    font-size: 0.56rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin-bottom: 0.1rem;
}

.first__desc {
    color: #CCC;
    font-family: Gabarito;
    font-size: 0.16rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    max-width: 5.6rem;
}

/* ============================================================
   第二屏：The Popular Products（与首页第三屏一致）
   ============================================================ */
.popular {
    position: relative;
    padding: 1rem 3.1rem ;
    background: #fff;
    overflow: hidden;
}

.popular__title {
    color: #333;
    text-align: center;
    font-family: Gabarito;
    font-size: 0.56rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin-bottom: 0.6rem;
}

.popular__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.24rem;
}

.popular__card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 4.12rem;
    height: 5.5rem;
    padding: 0.32rem;
    border-radius: 0.16rem;
    background: #F8F9FB;
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform;
}

.popular__card:hover {
    transform: translateY(-0.08rem);
    box-shadow: 0 0.2rem 0.48rem rgba(31, 45, 89, 0.1);
}

.popular__card-overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    border-radius: 0.16rem;
    cursor: pointer;
}

.popular__card-tag {
    color: #999;
    text-align: center;
    font-family: Gabarito;
    font-size: 0.16rem;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    margin-bottom: 0.08rem;
}

.popular__card-title {
    color: #333;
    text-align: center;
    font-family: Gabarito;
    font-size: 0.3rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    text-transform: capitalize;
    margin-bottom: 0.25rem;
}

.popular__card:hover .popular__card-title {
    color: transparent;
    background-image: linear-gradient(90deg, #00B8E2, #4D7CFE, #00B8E2);
    background-size: 200% auto;
    background-position: 0% center;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: popularTitleGradient 2.5s linear infinite;
}

@keyframes popularTitleGradient {
    to {
        background-position: 200% center;
    }
}

.popular__card-media {
    width: 2.6rem;
    height: 2.6rem;
    margin-bottom: 0.37rem;
}

.popular__card-media img {
    display: block;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: transform;
}

.popular__card:hover .popular__card-media img {
    transform: scale(1.05);
}

.popular__card-actions {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.popular__card-link {
    color: #666;
    font-family: Gabarito, sans-serif;
    font-size: 0.15rem;
    font-weight: 400;
    line-height: normal;
    text-decoration: underline;
    text-underline-offset: 0.04rem;
    transition: color 0.3s ease;
}

.popular__card-link:hover {
    color: #00B8E2;
}

.popular__card-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.06rem;
    padding: 0.1rem 0.2rem;
    border-radius: 0.3rem;
    background: #333;
    color: #fff;
    font-family: Gabarito, sans-serif;
    font-size: 0.14rem;
    font-weight: 500;
    line-height: normal;
    text-decoration: none;
    transition: background 0.3s ease, transform 0.3s ease;
}

.popular__card-btn::after {
    content: ">";
    font-size: 0.12rem;
}

.popular__card-btn:hover {
    background: #00B8E2;
    transform: translateY(-0.02rem);
}

.popular__more {
    display: block;
    width: max-content;
    margin: 0.5rem auto 0;
    padding: 0.12rem 0.4rem;
    border-radius: 0.3rem;
    border: 1px solid #CCC;
    background: transparent;
    color: #333;
    font-family: Gabarito, sans-serif;
    font-size: 0.16rem;
    font-weight: 500;
    line-height: normal;
    text-decoration: none;
    transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.popular__more:hover {
    background: #333;
    border-color: #333;
    color: #fff;
    transform: translateY(-0.02rem);
}

.popular__subtitle {
    color: #333;
    text-align: center;
    font-family: Gabarito;
    font-size: 0.56rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin-top: 0.7rem;
}

.popular.is-in-view .popular__title {
    animation: popularFadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0s both;
}

.popular.is-in-view .popular__card:nth-child(1) {
    animation: popularFadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.15s both;
}

.popular.is-in-view .popular__card:nth-child(2) {
    animation: popularFadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.22s both;
}

.popular.is-in-view .popular__card:nth-child(3) {
    animation: popularFadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.29s both;
}

.popular.is-in-view .popular__card:nth-child(4) {
    animation: popularFadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.36s both;
}

.popular.is-in-view .popular__card:nth-child(5) {
    animation: popularFadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.43s both;
}

.popular.is-in-view .popular__card:nth-child(6) {
    animation: popularFadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.5s both;
}

.popular.is-in-view .popular__more {
    animation: popularFadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.6s both;
}

.popular.is-in-view .popular__subtitle {
    animation: popularFadeUp 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.7s both;
}

@keyframes popularFadeUp {
    from {
        opacity: 0;
        transform: translateY(0.28rem);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 第六屏：FAQ（与 solutions.html 最后一屏一致） */
.catalog-main .sixth {
    position: relative;
    width: 19.2rem;
    max-width: 100%;
    margin: 0 auto;
    overflow: hidden;
    box-sizing: border-box;
}

.catalog-main .sixth .eighth__inner {
    width: 100%;
    height: 100%;
    padding: 0.7rem 3.1rem 0.6rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    box-sizing: border-box;
}

.catalog-main .sixth .eighth__head {
    text-align: center;
    margin-bottom: 0.62rem;
}

.catalog-main .sixth .eighth__title {
    color: #333;
    text-align: center;
    font-family: Gabarito;
    font-size: 0.48rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin: 0 0 0.1rem;
}

.catalog-main .sixth .eighth__subtitle {
    color: #666;
    text-align: center;
    font-family: Gabarito;
    font-size: 0.16rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
}

.catalog-main .sixth .eighth__list {
    width: 100%;
    max-width: 11.8rem;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.catalog-main .sixth .eighth__item {
    background: #fff;
    border-radius: 0.08rem;
    box-shadow: 0 0.02rem 0.08rem rgba(0, 0, 0, 0.06);
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.catalog-main .sixth .eighth__item:hover {
    box-shadow: 0 0.04rem 0.14rem rgba(0, 0, 0, 0.1);
}

.catalog-main .sixth .eighth__question {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.2rem;
    padding: 0.24rem 0.3rem;
    border: none;
    background: none;
    cursor: pointer;
    text-align: left;
    outline: none;
}

.catalog-main .sixth .eighth__qmark {
    flex-shrink: 0;
    width: 0.4rem;
    height: 0.4rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #00B8E2 0%, #0063C3 100%);
    color: #FFF;
    text-align: center;
    font-family: Gabarito;
    font-size: 0.2rem;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
}

.catalog-main .sixth .eighth__qtext {
    flex: 1;
    color: #333;
    font-family: Gabarito;
    font-size: 0.2rem;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
}

.catalog-main .sixth .eighth__item.is-open .eighth__qtext {
    font-weight: 700;
}

.catalog-main .sixth .eighth__arrow {
    flex-shrink: 0;
    width: 0.1rem;
    height: 0.1rem;
    position: relative;
    background: #333333;
    clip-path: polygon(0 0, 62% 50%, 0 100%, 18% 100%, 80% 50%, 18% 0);
    transform: rotate(0deg);
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    margin-right: 0.04rem;
}

.catalog-main .sixth .eighth__arrow::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, #00B8E2 0%, #0063C3 100%);
    opacity: 0;
    transition: opacity 0.35s ease;
}

.catalog-main .sixth .eighth__item.is-open .eighth__arrow {
    transform: rotate(90deg);
}

.catalog-main .sixth .eighth__item.is-open .eighth__arrow::after {
    opacity: 1;
}

.catalog-main .sixth .eighth__answer {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.catalog-main .sixth .eighth__item.is-open .eighth__answer {
    grid-template-rows: 1fr;
}

.catalog-main .sixth .eighth__answer-inner {
    overflow: hidden;
}

.catalog-main .sixth .eighth__answer-inner p {
    margin: 0;
    padding: 0.16rem 0.3rem 0.24rem 0.86rem;
    color: #666;
    font-family: Gabarito;
    font-size: 0.16rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    border-top: 1px solid #eee;
}

/* ---- 第六屏入场动画 ---- */
html.js .catalog-main .sixth .eighth__title {
    opacity: 1;
    transform: none;
}

html.js .catalog-main .sixth:not(.sixth--played) .eighth__head,
html.js .catalog-main .sixth:not(.sixth--played) .eighth__item {
    opacity: 0;
    transform: translateY(0.2rem);
    will-change: opacity, transform;
}

html.js .catalog-main .sixth.is-in-view .eighth__head,
html.js .catalog-main .sixth.is-in-view .eighth__item {
    animation-name: sixthFadeUp;
    animation-duration: 0.65s;
    animation-timing-function: cubic-bezier(0.22, 1, 0.36, 1);
    animation-fill-mode: both;
}

html.js .catalog-main .sixth.is-in-view .eighth__head {
    animation-delay: 0s;
}

html.js .catalog-main .sixth.is-in-view .eighth__item:nth-child(1) {
    animation-delay: 0.06s;
}

html.js .catalog-main .sixth.is-in-view .eighth__item:nth-child(2) {
    animation-delay: 0.12s;
}

html.js .catalog-main .sixth.is-in-view .eighth__item:nth-child(3) {
    animation-delay: 0.18s;
}

html.js .catalog-main .sixth.is-in-view .eighth__item:nth-child(4) {
    animation-delay: 0.24s;
}

html.js .catalog-main .sixth.is-in-view .eighth__item:nth-child(5) {
    animation-delay: 0.3s;
}

@keyframes sixthFadeUp {
    from {
        opacity: 0;
        transform: translateY(0.2rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 第五屏：Related Reading（与 index.html 倒数第二屏一致） */
.catalog-main .fifth {
    position: relative;
    padding: 0 0.6rem 0.5rem;
    overflow: hidden;
}

/* 标题 */
.catalog-main .fifth .sixth__title {
    position: relative;
    z-index: 1;
    margin: 0 auto 0.55rem;
    text-align: center;
    color: #1a1d23;
    font-family: "Gabarito", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.01rem;
    line-height: 1;
}

/* 列表 */
.catalog-main .fifth .sixth__list {
    position: relative;
    z-index: 1;
    list-style: none;
    margin: 0 auto;
    padding: 0;
    max-width: 16rem;
    display: flex;
    flex-direction: column;
}

/* 单条 */
.catalog-main .fifth .sixth__item {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.32rem 0.5rem;
    background: #ffffff;
    border-radius: 0.04rem;
    cursor: pointer;
    transition: transform 0.25s ease, background-color 0.25s ease;
}

.catalog-main .fifth .sixth__item+.sixth__item {
    margin-top: 0.04rem;
}

/* 悬浮选中效果：左侧主题色指示条 */
.catalog-main .fifth .sixth__item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0.04rem;
    border-radius: 0.04rem 0 0 0.04rem;
    background: linear-gradient(180deg, #22d3ee, #4f7cff);
    transform: scaleY(0);
    transform-origin: center;
    transition: transform 0.25s ease;
    will-change: transform;
}

.catalog-main .fifth .sixth__item:hover::before {
    transform: scaleY(1);
}

.catalog-main .fifth .sixth__item:hover {
    background: #ffffff;
    transform: translateY(-0.02rem);
    box-shadow: 0 0.1rem 0.32rem rgba(31, 45, 89, 0.1);
}

/* 整条卡片可点击跳转：绝对定位覆盖链接（与首页新闻一致） */
.catalog-main .fifth .sixth__link {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1;
}

/* 进入视口前隐藏内容 */
html.js .catalog-main .fifth:not(.is-in-view):not(.fifth--played) .sixth__title,
html.js .catalog-main .fifth:not(.is-in-view):not(.fifth--played) .sixth__item,
html.js .catalog-main .fifth:not(.is-in-view):not(.fifth--played) .sixth__more {
    opacity: 0;
}

/* 入场动画：进入视口加 .is-in-view 触发，播完移除并标记 fifth--played */
.catalog-main .fifth.is-in-view .sixth__title {
    animation: sixthFadeUp 0.6s ease 0s both;
}

.catalog-main .fifth.is-in-view .sixth__item:nth-child(1) {
    animation: sixthFadeUp 0.6s ease 0.06s both;
}

.catalog-main .fifth.is-in-view .sixth__item:nth-child(2) {
    animation: sixthFadeUp 0.6s ease 0.16s both;
}

.catalog-main .fifth.is-in-view .sixth__item:nth-child(3) {
    animation: sixthFadeUp 0.6s ease 0.26s both;
}

.catalog-main .fifth.is-in-view .sixth__more {
    animation: sixthFadeUp 0.5s ease 0.38s both;
}

/* 左侧日期 */
.catalog-main .fifth .sixth__date {
    flex: 0 0 1.6rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #1a1d23;
    line-height: 1;
}

.catalog-main .fifth .sixth__date-day {
    font-family: "Gabarito", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 0.62rem;
    font-weight: 700;
}

.catalog-main .fifth .sixth__date-year {
    margin-top: 0.1rem;
    font-size: 0.16rem;
    font-weight: 400;
    color: #6b7280;
    letter-spacing: 0.01rem;
}

/* 中间内容 */
.catalog-main .fifth .sixth__content {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.catalog-main .fifth .sixth__item-title {
    margin: 0;
    color: #1a1d23;
    font-family: "Gabarito", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 0.24rem;
    font-weight: 600;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.catalog-main .fifth .sixth__item-desc {
    margin: 0;
    color: #6b7280;
    font-size: 0.16rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 右侧图片 */
.catalog-main .fifth .sixth__media {
    flex: 0 0 auto;
    width: 2.4rem;
    height: 1.5rem;
    border-radius: 0.04rem;
    overflow: hidden;
    background: #d6dae0;
    position: relative;
}

.catalog-main .fifth .sixth__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.35s ease;
    will-change: transform;
}

.catalog-main .fifth .sixth__item:hover .sixth__img {
    transform: scale(1.06);
}

/* View More 按钮 */
.catalog-main .fifth .sixth__more {
    position: relative;
    z-index: 1;
    display: block;
    width: fit-content;
    margin: 0.45rem auto 0.3rem;
    padding: 0.12rem 0.42rem;
    color: #1a1d23;
    font-size: 0.18rem;
    font-weight: 500;
    text-decoration: none;
    border: 0.01rem solid #1a1d23;
    border-radius: 0.32rem;
    background: transparent;
    transition: transform 0.25s ease, background-color 0.25s ease, color 0.25s ease;
}

.catalog-main .fifth .sixth__more:hover {
    background: #1a1d23;
    color: #ffffff;
    transform: translateY(-0.02rem);
    box-shadow: 0 0.08rem 0.24rem rgba(20, 30, 60, 0.12);
}

.catalog-main .fifth .sixth__more:active {
    transform: translateY(0);
}

/* ============================================================
   第三屏：Products banner（4 屏全宽展示，与 product-detail 第四屏同风格）
   ============================================================ */
.third {
    position: relative;
    width: 100%;
    max-width: 19.2rem;
    height: 34.29rem; /* sticky 8.73rem + 3 段 × 8.52rem 滚动距离 */
    margin: 0 auto;
}

.third__sticky {
    position: sticky;
    top: 0;
    width: 100%;
    height: 8.73rem;
    overflow: hidden;
}

.third__panel {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    box-sizing: border-box;
    opacity: 0;
    pointer-events: none;
    will-change: opacity;
}

.third__panel--1 {
    background: #000 url('../assets/images/Catalog/second-img1.png') no-repeat center / cover;
    padding: 2.95rem 0 0 3.1rem;
}

.third__panel--2 {
    background: #000 url('../assets/images/Catalog/second-img2.png') no-repeat center / cover;
    padding: 1.22rem 0 0 3.1rem;
}

.third__panel--3 {
    background: #000;
    padding: 2.98rem 0 0 3.1rem;
}

.third__panel--3 .third__content {
    position: relative;
    z-index: 2;
}

.third__panel-img {
    position: absolute;
    right: 0;
    top: 0.91rem;
    width: 12.4rem;
    height: 7.38rem;
    object-fit: contain;
    z-index: 1;
}

.third__panel--4 {
    background: #000 url('../assets/images/Catalog/second-img4.png') no-repeat center / cover;
    padding: 0.97rem 0 0 0;
    align-items: center;
    text-align: center;
}

.third__content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    max-width: 6rem;
}

.third__panel--4 .third__content {
    align-items: center;
    text-align: center;
    max-width: 100%;
}

.third__num {
    font-family: Gabarito, sans-serif;
    font-size: 0.96rem;
    font-style: normal;
    font-weight: 700;
    line-height: 0.96rem;
    background: linear-gradient(180deg, #FFF 0%, #E6E6E6 25%, #A6A6A6 50%, #000 73%, #000 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.12rem;
}

.third__heading {
    color: #FFF;
    font-family: Gabarito, sans-serif;
    font-size: 0.48rem;
    font-style: normal;
    font-weight: 700;
    line-height: 150%;
    margin: 0 0 0.2rem;
}

.third__desc {
    color: #FFF;
    font-family: Gabarito, sans-serif;
    font-size: 0.2rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    margin: 0;
    max-width: 5.8rem;
}

.third__panel--4 .third__desc {
    max-width: none;
}

.third__buttons {
    display: flex;
    align-items: center;
    gap: 6.25rem;
    margin-top: 4rem;
}

.third__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.08rem;
    padding: 0.16rem 0.24rem;
    white-space: nowrap;
    border: none;
    border-radius: 0.32rem;
    color: #FFF;
    text-align: center;
    font-family: Gabarito, sans-serif;
    font-size: 0.2rem;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.third__btn--cold {
    background: linear-gradient(90deg, #00B8E2 0%, #0063C3 100%);
}

.third__btn--hot {
    background: linear-gradient(90deg, #D3B382 0%, #C69D67 100%);
}

.third__btn:hover {
    transform: translateY(-0.02rem);
    box-shadow: 0 0.04rem 0.12rem rgba(0, 0, 0, 0.3);
}

.third__btn img {
    width: 0.32rem;
    height: 0.32rem;
    flex-shrink: 0;
}

/* ============================================================
   第四屏：Core Specifications（与 product-detail 第五屏完全一致，仅扩展为 4 个产品列）
   ============================================================ */
.fourth {
    position: relative;
    width: 100%;
    max-width: 19.2rem;
    margin: 0 auto;
    padding: 1rem 3.1rem;
    box-sizing: border-box;
}

.fourth__title {
    color: #333;
    text-align: center;
    font-family: Gabarito, sans-serif;
    font-size: 0.48rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin: 0 0 0.69rem;
}

.fourth form {
    width: fit-content;
    height: 1.8rem;
    background: #F5F5F5;
    border-radius: 0.1rem;
    margin: 0 auto;
    display: flex;
    align-items: center;
    box-sizing: border-box;
}

.fourth form ul {
    width: 100%;
    display: flex;
    align-items: center;
    padding: 0;
    margin: 0;
    list-style: none;
}

.fourth form ul li {
    display: contents;
}

.fourth form li:first-child span {
    flex: 0 0 135px;
    width: 135px;
    max-width: 135px;
    padding: 0.25rem 0.2rem;
    box-sizing: border-box;
    color: #333;
    font-family: Gabarito, sans-serif;
    font-size: 0.2rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
}

.fourth form li input {
    flex: 0 0 250px;
    width: 250px;
    max-width: 250px;
    margin: 0 0.08rem;
    height: 0.6rem;
    padding: 0 0.12rem;
    box-sizing: border-box;
    border-radius: 0.1rem;
    border: 1px solid #D9D9D9;
    background: #FFF;
    outline: none;
    color: #333;
    text-align: center;
    font-family: Gabarito, sans-serif;
    font-size: 0.16rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.fourth form li input:focus {
    border-color: #CDA875;
    box-shadow: 0 0 0 0.02rem rgba(205, 168, 117, 0.25);
}

#fourthTable {
    display: block;
    width: fit-content;
    margin: 0 auto;
    background: #FFF;
    border-spacing: 0;
    border-collapse: collapse;
}

#fourthTable tbody {
    display: block;
    width: 100%;
}

#fourthTable tr {
    display: flex;
    align-items: center;
    border-bottom: 1px solid #EEE;
    opacity: 1;
    overflow: hidden;
    transition: max-height 0.35s ease, opacity 0.35s ease;
}

#fourthTable tr:last-child {
    border-bottom: none;
}

#fourthTable td:first-child {
    flex: 0 0 135px;
    width: 135px;
    max-width: 135px;
    min-width: 0;
    overflow-wrap: anywhere;
    word-break: break-word;
    color: #303030;
    font-family: Gabarito, sans-serif;
    font-size: 0.2rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    padding: 0.25rem 0.2rem;
    box-sizing: border-box;
    height: max-content;
}

#fourthTable td:not(:first-child) {
    flex: 0 0 250px;
    width: 250px;
    margin: 0 0.08rem;
    color: #666;
    text-align: center;
    font-family: Gabarito, sans-serif;
    font-size: 0.16rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    padding: 0.25rem 0.2rem;
    box-sizing: border-box;
}

#fourthTable tr:first-child td:not(:first-child) {
    display: flex;
    justify-content: center;
    padding: 0.4rem 0.2rem;
}

#fourthTable td div {
    width: 250px;
    height: 250px;
    background: #F5F5F5;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#fourthTable td div img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 10px;
}

.fourth__more {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 0.4rem;
    margin: 0.4rem auto 0;
    padding: 0.1rem 0.14rem;
    border-radius: 0.2rem;
    background: #fff;
    border: 1px solid #D9D9D9;
    box-sizing: border-box;
    color: #333;
    font-family: Gabarito, sans-serif;
    font-size: 0.16rem;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    cursor: pointer;
}

.fourth__more-icon {
    width: 0.16rem;
    height: 0.16rem;
    margin-left: 0.1rem;
    transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.fourth__more.is-expanded .fourth__more-icon {
    transform: rotate(180deg);
}

/* 第四屏入场动画（与 product-detail 第五屏一致） */
html.js .fourth:not(.is-in-view):not(.fourth--played) .fourth__title,
html.js .fourth:not(.is-in-view):not(.fourth--played) .fourth form,
html.js .fourth:not(.is-in-view):not(.fourth--played) #fourthTable,
html.js .fourth:not(.is-in-view):not(.fourth--played) .fourth__more {
    opacity: 0;
    transform: translateY(0.3rem);
}

.fourth.is-in-view .fourth__title {
    animation: pdFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.1s both;
}

.fourth.is-in-view .fourth form {
    animation: pdFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.2s both;
}

.fourth.is-in-view #fourthTable {
    animation: pdFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.3s both;
}

.fourth.is-in-view .fourth__more {
    animation: pdFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.4s both;
}

@keyframes pdFadeUp {
    from {
        opacity: 0;
        transform: translateY(0.3rem);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .fourth {
        padding: 0.8rem 0.6rem;
    }

    .fourth__title {
        font-size: 0.32rem;
        margin-bottom: 0.4rem;
    }

    .fourth form,
    #fourthTable {
        width: 100%;
    }

    .fourth form li:first-child span,
    #fourthTable td:first-child {
        flex: 0 0 1.1rem;
        width: 1.1rem;
        min-width: 0;
        overflow-wrap: anywhere;
        word-break: break-word;
        font-size: 0.13rem;
        padding: 0.2rem 0.12rem;
    }

    .fourth form li input {
        flex: 1;
        width: auto;
        max-width: none;
        min-width: 0;
        font-size: 0.12rem;
        height: 0.48rem;
        margin: 0 0.04rem;
    }

    #fourthTable td:not(:first-child) {
        flex: 1;
        width: auto;
        margin: 0 0.04rem;
        font-size: 0.12rem;
        line-height: 1.35;
        padding: 0.2rem 0.1rem;
    }

    #fourthTable tr:first-child td:not(:first-child) {
        padding: 0.2rem 0.1rem;
    }

    #fourthTable td div {
        width: 1.2rem;
        height: 1.2rem;
    }

    .fourth__more {
        height: 0.36rem;
        font-size: 0.14rem;
        margin-top: 0.3rem;
    }

    .popular {
        padding: 0 0.24rem 0.5rem;
    }

    .popular__title,
    .popular__subtitle {
        font-size: 0.32rem;
        margin-bottom: 0.32rem;
    }

    .popular__subtitle {
        margin-top: 0.4rem;
        margin-bottom: 0;
    }

    .popular__grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.18rem;
    }

    .popular__card {
        width: 100%;
        height: auto;
        min-height: 3.6rem;
        padding: 0.2rem 0.18rem;
        border-radius: 0.12rem;
    }

    .popular__card-tag {
        font-size: 0.13rem;
        margin-bottom: 0.04rem;
    }

    .popular__card-title {
        font-size: 0.2rem;
        margin-bottom: 0.16rem;
    }

    .popular__card-media {
        width: 1.6rem;
        height: 1.6rem;
        margin-bottom: 0.2rem;
    }

    .popular__card-link {
        font-size: 0.13rem;
    }

    .popular__card-btn {
        padding: 0.08rem 0.16rem;
        font-size: 0.12rem;
    }

    .popular__more {
        margin-top: 0.3rem;
        padding: 0.1rem 0.28rem;
        font-size: 0.14rem;
    }
}

/* ============================================================
   H5 移动端适配
   ============================================================ */

/* ---------- 汉堡菜单按钮（与其他页面一致） ---------- */
/* 桌面端默认隐藏，仅移动端显示 */
.menu-btn {
    display: none;
}

html[data-mode="h5"] .menu-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.09rem;
    width: 0.44rem;
    height: 0.44rem;
    margin-left: auto;
    padding: 0;
    border: none;
    border-radius: 0.1rem;
    background: rgba(255, 255, 255, 0.24);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

html[data-mode="h5"] .menu-btn span {
    display: block;
    width: 0.22rem;
    height: 0.03rem;
    border-radius: 0.03rem;
    background: #fff;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

html[data-mode="h5"] .header.is-scrolled .menu-btn {
    background: rgba(51, 51, 51, 0.08);
}

html[data-mode="h5"] .header.is-scrolled .menu-btn span {
    background: #333;
}

html[data-mode="h5"] .menu-btn.is-open span:nth-child(1) {
    transform: translateY(0.12rem) rotate(45deg);
}

html[data-mode="h5"] .menu-btn.is-open span:nth-child(2) {
    opacity: 0;
}

html[data-mode="h5"] .menu-btn.is-open span:nth-child(3) {
    transform: translateY(-0.12rem) rotate(-45deg);
}

/* 移动端：隐藏桌面导航，保留搜索与 Get a Quote 等右侧按钮 */
html[data-mode="h5"] .header__inner-nav {
    display: none;
}

/* 移动端：导航栏紧凑布局 */
html[data-mode="h5"] .header__inner {
    justify-content: space-between;
}

html[data-mode="h5"] .logo {
    order: 1;
    margin-left: 0;
    flex-shrink: 0;
}

html[data-mode="h5"] .logo img {
    width: 1.1rem;
    height: auto;
}

html[data-mode="h5"] .header__inner-right {
    order: 2;
    margin-right: 0;
    margin-left: auto;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.08rem;
}

html[data-mode="h5"] .menu-btn {
    order: 3;
    width: 0.4rem;
    height: 0.4rem;
    margin-left: 0.08rem;
    margin-right: 0;
    flex-shrink: 0;
}

/* 右侧按钮统一不换行 */
html[data-mode="h5"] .header__inner-right-search,
html[data-mode="h5"] .header__inner-right-language,
html[data-mode="h5"] .header__inner-right-msg,
html[data-mode="h5"] .header__inner-right > a:last-child {
    flex-shrink: 0;
    white-space: nowrap;
}

html[data-mode="h5"] .header__inner-right-search {
    width: 0.36rem;
    height: 0.36rem;
    margin-right: 0;
}

html[data-mode="h5"] .header__inner-right-language {
    width: auto;
    min-width: 0.62rem;
    height: 0.36rem;
    padding: 0 0.08rem;
    margin-right: 0;
    font-size: 0.2rem;
}

html[data-mode="h5"] .header__inner-right-msg {
    height: 0.36rem;
    padding: 0 0.14rem;
    margin-right: 0;
    font-size: 0.2rem;
}

html[data-mode="h5"] .header__inner-right > a:last-child {
    height: 0.36rem;
    padding: 0 0.14rem;
    margin-right: 0;
    font-size: 0.2rem;
}

/* 移动端：展开后的全屏下拉菜单 */
html[data-mode="h5"] .header__inner-nav.is-open {
    position: fixed;
    top: 0.8rem;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 7.5rem;
    height: calc(100vh - 0.8rem);
    z-index: 99;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 0.3rem 0.6rem 0.6rem;
    box-sizing: border-box;
    background: #fff;
    overflow-y: auto;
    animation: h5NavFadeIn 0.25s ease both;
}

@keyframes h5NavFadeIn {
    from {
        opacity: 0;
        transform: translate(-50%, -0.2rem);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

html[data-mode="h5"] .header__inner-nav.is-open .header__inner-nav-item {
    width: 100%;
    padding: 0.22rem 0;
    border-bottom: 0.01rem solid #f0f2f5;
}

html[data-mode="h5"] .header__inner-nav.is-open .header__inner-nav-item a {
    color: #333;
    font-size: 0.3rem;
}

html[data-mode="h5"] .header__inner-nav.is-open .header__inner-nav-item:active a,
html[data-mode="h5"] .header__inner-nav.is-open .header__inner-nav-item a:active {
    color: #00B8E2;
}

/* 当前页在 H5 菜单中与其他项保持一致 */
html[data-mode="h5"] .header__inner-nav.is-open .header__inner-nav-item.is-active a {
    color: #333;
    background: none;
    -webkit-background-clip: unset;
    background-clip: unset;
    -webkit-text-fill-color: initial;
}

html[data-mode="h5"] .header__inner-nav.is-open .header__inner-nav-item.is-active::after {
    display: none;
}

/* ---------- 首屏 Banner（与 oem-odm 页高度对齐：背景铺满，内容撑起高度） ---------- */
html[data-mode="h5"] .first {
    height: auto;
    min-height: 5.85rem;
}

html[data-mode="h5"] .first__viewport {
    position: absolute;
    inset: 0;
    height: 100%;
    padding-top: 0;
}

html[data-mode="h5"] .first__viewport .first__bg{
    display: none;
}

html[data-mode="h5"] .first__content {
    position: relative;
    top: auto;
    left: auto;
    right: auto;
    padding: 3.4rem 0.4rem 0.6rem;
    max-width: 100%;
    box-sizing: border-box;
}

html[data-mode="h5"] .first__title {
    font-size: 0.42rem;
    line-height: 1.2;
    margin-bottom: 0.1rem;
}

html[data-mode="h5"] .first__desc {
    font-size: 0.26rem;
    line-height: 1.6;
    max-width: 100%;
}

/* ---------- 第二屏 热门产品（卡片尺寸与 products 页产品列表一致：2 列网格） ---------- */
html[data-mode="h5"] .popular {
    padding: 0.6rem 0.4rem 0.7rem;
}

html[data-mode="h5"] .popular__title {
    font-size: 0.4rem;
    margin-bottom: 0.4rem;
}

html[data-mode="h5"] .popular__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.24rem;
}

html[data-mode="h5"] .popular__card {
    width: 100%;
    height: auto;
    min-height: 4.6rem;
    padding: 0.26rem 0.2rem 0.3rem;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
}

html[data-mode="h5"] .popular__card-tag {
    font-size: 0.2rem;
    line-height: 1.4;
    margin-bottom: 0.12rem;
}

html[data-mode="h5"] .popular__card-title {
    font-size: 0.27rem;
    line-height: 1.3;
    margin-bottom: 0.14rem;
}

html[data-mode="h5"] .popular__card-media {
    width: 2.1rem;
    height: 2.1rem;
    margin-bottom: 0.2rem;
}

html[data-mode="h5"] .popular__card-actions {
    margin-top: auto;
    gap: 0.1rem;
}

html[data-mode="h5"] .popular__card-link {
    font-size: 0.2rem;
}

html[data-mode="h5"] .popular__card-btn {
    padding: 0.12rem 0.18rem;
    font-size: 0.2rem;
    border-radius: 0.24rem;
}

html[data-mode="h5"] .popular__more {
    margin-top: 0.4rem;
    padding: 0.12rem 0.4rem;
    font-size: 0.22rem;
}

html[data-mode="h5"] .popular__subtitle {
    font-size: 0.4rem;
    margin-top: 0.4rem;
}

/* ---------- 第三屏：H5 平铺展示（无滚动切换） ---------- */
html[data-mode="h5"] .third {
    height: auto;
}

html[data-mode="h5"] .third__sticky {
    position: static;
    width: 100%;
    height: auto;
}

html[data-mode="h5"] .third__panel {
    position: relative;
    inset: auto;
    width: 100%;
    min-height: 7.2rem;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.3rem;
    padding: 0.4rem;
    box-sizing: border-box;
    z-index: auto;
    opacity: 1 !important;
}

html[data-mode="h5"] .third__panel--3 {
    padding: 0.4rem;
}

html[data-mode="h5"] .third__content {
    position: relative;
    z-index: 2;
    align-items: center;
    text-align: center;
    max-width: 100%;
}

html[data-mode="h5"] .third__num {
    font-size: 0.7rem;
    line-height: 0.7rem;
    margin-bottom: 0.12rem;
}

html[data-mode="h5"] .third__heading {
    font-size: 0.34rem;
    margin-bottom: 0.14rem;
}

html[data-mode="h5"] .third__desc {
    font-size: 0.22rem;
    line-height: 1.6;
    max-width: 5.8rem;
}

html[data-mode="h5"] .third__panel-img {
    position: static;
    width: 4.2rem;
    height: auto;
    margin-bottom: 0.2rem;
}

html[data-mode="h5"] .third__buttons {
    gap: 0.4rem;
    margin-top: 0.3rem;
}

html[data-mode="h5"] .third__btn {
    padding: 0.16rem 0.28rem;
    font-size: 0.22rem;
}

html[data-mode="h5"] .third__btn img {
    width: 0.3rem;
    height: 0.3rem;
}

/* ---------- 第四屏 规格表 ---------- */
html[data-mode="h5"] .fourth {
    padding: 0.6rem 0.4rem;
}

html[data-mode="h5"] .fourth__title {
    font-size: 0.4rem;
    margin-bottom: 0.4rem;
}

html[data-mode="h5"] .fourth form {
    width: 100%;
    height: auto;
    padding: 0.2rem;
    box-sizing: border-box;
}

html[data-mode="h5"] .fourth form ul {
    flex-wrap: wrap;
    gap: 0.12rem;
}

html[data-mode="h5"] .fourth form li:first-child span {
    flex: 0 0 100%;
    width: 100%;
    max-width: 100%;
    padding: 0 0 0.1rem;
    font-size: 0.24rem;
}

html[data-mode="h5"] .fourth form li input {
    flex: 1 1 2.6rem;
    width: auto;
    max-width: none;
    min-width: 2.6rem;
    height: 0.7rem;
    margin: 0;
    font-size: 0.2rem;
}

html[data-mode="h5"] #fourthTable {
    width: 100%;
    overflow: auto;
}

html[data-mode="h5"] #fourthTable td:first-child {
    flex: 0 0 1.5rem;
    width: 1.5rem;
    max-width: 1.5rem;
    font-size: 0.14rem;
    padding: 0.16rem 0.1rem;
}

html[data-mode="h5"] #fourthTable td:not(:first-child) {
    flex: 1;
    width: auto;
    min-width: 0;
    margin: 0;
    font-size: 0.13rem;
    line-height: 1.4;
    padding: 0.16rem 0.08rem;
}

html[data-mode="h5"] #fourthTable tr:first-child td:not(:first-child) {
    padding: 0.12rem 0.08rem;
}

html[data-mode="h5"] #fourthTable td div {
    width: 1.1rem;
    height: 1.1rem;
}

html[data-mode="h5"] .fourth__more {
    height: 0.6rem;
    font-size: 0.22rem;
    margin-top: 0.4rem;
    padding: 0.1rem 0.3rem;
}

/* ---------- 第五屏 Related Reading ---------- */
html[data-mode="h5"] .catalog-main .fifth {
    padding: 0.6rem 0.4rem;
}

html[data-mode="h5"] .catalog-main .fifth .sixth__title {
    font-size: 0.4rem;
    margin-bottom: 0.4rem;
}

html[data-mode="h5"] .catalog-main .fifth .sixth__list {
    flex-direction: column;
    gap: 0.3rem;
}

html[data-mode="h5"] .catalog-main .fifth .sixth__item {
    flex-direction: row;
    gap: 0.2rem;
    padding: 0.28rem 0.24rem;
}

html[data-mode="h5"] .catalog-main .fifth .sixth__date {
    flex: 0 0 1.2rem;
}

html[data-mode="h5"] .catalog-main .fifth .sixth__date-day {
    font-size: 0.44rem;
}

html[data-mode="h5"] .catalog-main .fifth .sixth__date-year {
    font-size: 0.14rem;
    margin-top: 0.06rem;
}

html[data-mode="h5"] .catalog-main .fifth .sixth__content {
    gap: 0.08rem;
}

html[data-mode="h5"] .catalog-main .fifth .sixth__item-title {
    font-size: 0.22rem;
}

html[data-mode="h5"] .catalog-main .fifth .sixth__item-desc {
    font-size: 0.18rem;
}

html[data-mode="h5"] .catalog-main .fifth .sixth__media {
    width: 1.8rem;
    height: 1.3rem;
}

html[data-mode="h5"] .catalog-main .fifth .sixth__more {
    margin: 0.4rem auto 0.2rem;
    padding: 0.12rem 0.32rem;
    font-size: 0.22rem;
}

/* ---------- 第六屏 FAQ ---------- */
html[data-mode="h5"] .catalog-main .sixth {
    height: auto;
    padding: 0.6rem 0.4rem;
}

html[data-mode="h5"] .catalog-main .sixth .eighth__inner {
    padding: 0;
    gap: 0.4rem;
}

html[data-mode="h5"] .catalog-main .sixth .eighth__head {
    margin-bottom: 0;
}

html[data-mode="h5"] .catalog-main .sixth .eighth__title {
    font-size: 0.4rem;
    margin-bottom: 0.1rem;
}

html[data-mode="h5"] .catalog-main .sixth .eighth__subtitle {
    font-size: 0.2rem;
}

html[data-mode="h5"] .catalog-main .sixth .eighth__list {
    gap: 0.16rem;
}

html[data-mode="h5"] .catalog-main .sixth .eighth__question {
    padding: 0.22rem 0.24rem;
    gap: 0.16rem;
}

html[data-mode="h5"] .catalog-main .sixth .eighth__qmark {
    width: 0.4rem;
    height: 0.4rem;
}

html[data-mode="h5"] .catalog-main .sixth .eighth__qtext {
    font-size: 0.22rem;
}

html[data-mode="h5"] .catalog-main .sixth .eighth__answer-inner p {
    font-size: 0.2rem;
    padding: 0.16rem 0.24rem 0.24rem;
}

/* ---------- 页脚 ---------- */
html[data-mode="h5"] .footer__main {
    padding: 0.4rem 0.4rem 0.3rem;
}

html[data-mode="h5"] .footer__links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.3rem 0.3rem;
}

html[data-mode="h5"] .footer__col {
    min-width: 0;
    gap: 0.1rem;
}

html[data-mode="h5"] .footer__title {
    font-size: 0.24rem;
    margin-bottom: 0.12rem;
    padding-bottom: 0.08rem;
}

html[data-mode="h5"] .footer__link {
    font-size: 0.22rem;
}

html[data-mode="h5"] .footer__contact-item {
    font-size: 0.22rem;
    gap: 0.1rem;
    margin-bottom: 0.14rem;
}

html[data-mode="h5"] .footer__contact-icon {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 0.5rem;
}

html[data-mode="h5"] .footer__contact-icon img {
    width: 0.24rem;
    height: 0.24rem;
}

html[data-mode="h5"] .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
    margin-top: 0.3rem;
    padding-top: 0.2rem;
}

html[data-mode="h5"] .footer__bottom .footer__logo {
    width: 2rem;
    height: auto;
}

html[data-mode="h5"] .footer__social {
    flex-direction: row;
    align-items: center;
    gap: 0.2rem;
}

html[data-mode="h5"] .footer__social-label {
    font-size: 0.22rem;
}

html[data-mode="h5"] .footer__social-icon {
    width: 0.5rem;
    height: 0.5rem;
}

html[data-mode="h5"] .footer__social-icon img {
    width: 0.24rem;
    height: 0.24rem;
}

html[data-mode="h5"] .footer__bar {
    flex-direction: column;
    height: auto;
    padding: 0.18rem 0.4rem;
    gap: 0.1rem;
}

/* ---------- 浮动侧边栏 ---------- */
html[data-mode="h5"] .float-bar {
    right: 0.2rem;
    bottom: 1.2rem;
    gap: 0.16rem;
    padding: 0.14rem 0.12rem;
}

html[data-mode="h5"] .float-bar__btn {
    width: 0.8rem;
    height: 0.8rem;
}

html[data-mode="h5"] .float-bar__btn img {
    width: 0.38rem;
    height: 0.38rem;
}