.first {
    position: relative;
    width: 100%;
    max-width: 19.2rem;
    height: 8rem;
    margin: 0 auto;
    background: #1a1a1a url('../assets/images/catalog/first-img.webp') no-repeat center / cover;
    box-sizing: border-box;
    padding: 0 1.6rem;
    color: #FFF;
    overflow: hidden;
    display: flex;
    align-items: center;
}

.first__content {
    flex: 1;
    min-width: 0;
}

.first__title {
    color: #FFF;
    font-family: Montserrat, sans-serif;
    font-size: 0.44rem;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    text-transform: capitalize;
    margin: 0 0 0.24rem;
}

.first__btn {
    padding: 0.18rem 0.4rem;
    background: var(--Style, #02347D);
    display: flex;
    align-items: center;
    color: #FFF;
    font-family: Inter;
    font-size: 0.18rem;
    font-style: normal;
    font-weight: 500;
    line-height: normal;
    text-transform: capitalize;
    width: max-content;
    margin-top: 0.68rem;
}

.first__btn img {
    position: relative;
    z-index: 1;
    width: 0.22rem;
    height: 0.22rem;
    margin-right: 0.1rem;
}

/* ---------- Download File 按钮：悬浮动效 ---------- */
/* 上浮 + 发光阴影 + 渐变底色铺满 + 高光扫过 + 图标弹动 */
.first__btn {
    position: relative;
    overflow: hidden;
    /* 建立独立层叠上下文，使 ::after（z-index:-1）浮于按钮背景之上、文字之下 */
    isolation: isolate;
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.35s ease;
}

/* 高光扫过层（默认停在左外侧） */
.first__btn::before {
    content: "";
    position: absolute;
    top: 0;
    left: -120%;
    z-index: 2;
    width: 60%;
    height: 100%;
    background: linear-gradient(120deg,
            transparent 0%,
            rgba(255, 255, 255, 0.45) 50%,
            transparent 100%);
    transform: skewX(-20deg);
    transition: left 0.75s cubic-bezier(0.22, 1, 0.36, 1);
    pointer-events: none;
}

/* 渐变底色层（悬浮时由左向右铺满） */
.first__btn::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(135deg, #00B8E2 0%, #0063C3 100%);
    transform: translateX(-101%);
    transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
    pointer-events: none;
}

.first__btn:hover {
    transform: translateY(-0.04rem);
    box-shadow:
        0 0 0 0.02rem rgba(2, 52, 125, 0.35),
        0 0.12rem 0.32rem rgba(0, 99, 195, 0.45);
}

.first__btn:hover::before {
    left: 120%;
}

.first__btn:hover::after {
    transform: translateX(0);
}

.first__btn:hover img {
    animation: firstBtnIcon 0.6s cubic-bezier(0.45, 0, 0.55, 1) 0s 2;
}

/* 按下回弹 */
.first__btn:active {
    transform: translateY(-0.01rem) scale(0.98);
    box-shadow: 0 0.04rem 0.12rem rgba(0, 99, 195, 0.35);
}

@keyframes firstBtnIcon {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(0.05rem) scale(1.08);
    }
}

.first__desc {
    color: #FFF;
    font-family: Montserrat, sans-serif;
    font-size: 0.16rem;
    font-style: normal;
    font-weight: 300;
    line-height: normal;
    text-transform: capitalize;
    margin: 0;
}

.first__breadcrumb {
    position: absolute;
    left: 1.6rem;
    bottom: 0.30rem;
    color: #FFF;
    font-family: Montserrat, sans-serif;
    font-size: 0.18rem;
    font-style: normal;
    font-weight: 300;
    line-height: normal;
    text-transform: capitalize;
    display: flex;
    align-items: center;
    gap: 0.10rem;
    margin: 0;
    padding: 0;
}

.first__breadcrumb a {
    color: #FFF;
    text-decoration: none;
    transition: opacity 0.25s ease;
}

.first__breadcrumb a:hover {
    opacity: 0.75;
}

.first__breadcrumb-sep {
    color: #FFF;
    opacity: 0.85;
}

.first__breadcrumb-current {
    color: #FFF;
}

/* ---------- H5 适配：首屏（与 about.css 首屏适配一致） ---------- */
html[data-mode="h5"] .first {
    height: 4.4rem;
    padding: 0 0.3rem;
}

html[data-mode="h5"] .first__title {
    font-size: 0.36rem;
    margin-bottom: 0.16rem;
}

html[data-mode="h5"] .first__btn {
    margin-top: 0.32rem;
    font-size: 0.2rem;
    padding: 0.14rem 0.32rem;
}

html[data-mode="h5"] .first__breadcrumb {
    left: 0.3rem;
    bottom: 0.20rem;
    font-size: 0.14rem;
    gap: 0.06rem;
}

.second {
    padding: 1rem 1.6rem 0;
    height: 9.69rem;
    position: relative;
    display: flex;
    justify-content: space-between;
}

.second img {
    width: 7.84rem;
    height: 4.87rem;
}

.second__inner {
    position: absolute;
    left: 1.92rem;
    bottom: 1rem;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #666;
    text-align: center;
    font-family: Inter;
    font-size: 0.18rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    text-transform: capitalize;
    width: 15.36rem;
    height: 4rem;
    background: url('../assets/images/catalog/second-img3.webp') no-repeat center / cover;
}

.second__inner h2 {
    color: #333;
    text-align: center;
    font-family: Inter;
    font-size: 0.4rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    text-transform: capitalize;
    margin-bottom: 0.14rem;
}

.second__inner p {
    margin-bottom: 0.5rem;
}

/* 正文段落：不沿用上方间距，保持原有版式 */
.second__inner .second__text {
    margin-bottom: 0;
    width: 13.17rem;
}

/* ---------- H5 适配：第二屏（PC 为「左右双图 + 居中叠层文案」） ---------- */
html[data-mode="h5"] .second {
    height: auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0.3rem;
    padding: 0.6rem 0.3rem;
    /* 入场动画的 translateX(±0.6rem) 在窄屏会形成瞬时横向溢出 */
    overflow: hidden;
}

/* 双图固定 7.84rem，窄屏并排必然超宽，改为纵向铺满 */
html[data-mode="h5"] .second img {
    width: 100%;
    height: auto;
}

/* 叠层文案固定 15.36rem 宽会撑破屏幕，改为常规流内自适应 */
html[data-mode="h5"] .second__inner {
    position: static;
    width: 100%;
    height: auto;
    padding: 0.3rem 0.24rem;
    box-sizing: border-box;
    font-size: 0.24rem;
}

html[data-mode="h5"] .second__inner h2 {
    font-size: 0.36rem;
    margin-bottom: 0.16rem;
}

html[data-mode="h5"] .second__inner p {
    margin-bottom: 0.24rem;
    width: auto;
}

.fifth {
    height: 8.24rem;
    padding: 0 1.6rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: url('../assets/images/catalog/fourth-img.webp') no-repeat center / cover;
}

.fifth h2 {
    color: #333;
    font-family: Inter;
    font-size: 0.4rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    text-transform: capitalize;
    margin-bottom: 0.14rem;
    width: 4.8rem;
}

.fifth span {
    color: rgba(102, 102, 102, 0.80);
    font-family: Inter;
    font-size: 0.18rem;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    text-transform: capitalize;
    margin-bottom: 0.63rem;
    width: 4.63rem;
}

.fifth p {
    color: #666;
    font-family: Inter;
    font-size: 0.18rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    text-transform: capitalize;
    width: 5.77rem;
}

/* ============================================================
   第五屏：滚动入场动效（common.js 为 section 添加 .is-in-view 触发）
   标题 → 副标题 → 正文 错峰上浮
   ============================================================ */
html.js .fifth:not(.is-in-view) h2,
html.js .fifth:not(.is-in-view) span,
html.js .fifth:not(.is-in-view) p {
    opacity: 0;
    transform: translateY(0.2rem);
}

.fifth.is-in-view h2 {
    animation: fifthFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0s backwards;
}

.fifth.is-in-view span {
    animation: fifthFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.1s backwards;
}

.fifth.is-in-view p {
    animation: fifthFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.2s backwards;
}

@keyframes fifthFadeUp {
    from {
        opacity: 0;
        transform: translateY(0.2rem);
    }

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

/* ============================================================
   第二屏：滚动入场动效（common.js 为 section 添加 .is-in-view 触发）
   两张产品图左右对向滑入 → 文案底板缩放淡入 → 标题/副标题/正文错峰上浮
   ============================================================ */
html.js .second:not(.is-in-view)>img:nth-of-type(1),
html.js .second:not(.is-in-view)>img:nth-of-type(2),
html.js .second:not(.is-in-view) .second__inner,
html.js .second:not(.is-in-view) .second__inner h2,
html.js .second:not(.is-in-view) .second__inner p {
    opacity: 0;
}

html.js .second:not(.is-in-view)>img:nth-of-type(1) {
    transform: translateX(-0.6rem);
}

html.js .second:not(.is-in-view)>img:nth-of-type(2) {
    transform: translateX(0.6rem);
}

html.js .second:not(.is-in-view) .second__inner {
    transform: translateY(0.24rem) scale(0.96);
}

html.js .second:not(.is-in-view) .second__inner h2,
html.js .second:not(.is-in-view) .second__inner p {
    transform: translateY(0.2rem);
}

.second.is-in-view>img:nth-of-type(1) {
    animation: secondSlideInLeft 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0s backwards;
}

.second.is-in-view>img:nth-of-type(2) {
    animation: secondSlideInRight 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.12s backwards;
}

.second.is-in-view .second__inner {
    animation: secondZoomIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.2s backwards;
}

.second.is-in-view .second__inner h2 {
    animation: secondFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.45s backwards;
}

.second.is-in-view .second__inner>p:not(.second__text) {
    animation: secondFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.55s backwards;
}

.second.is-in-view .second__inner .second__text {
    animation: secondFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.65s backwards;
}

@keyframes secondSlideInLeft {
    from {
        opacity: 0;
        transform: translateX(-0.6rem);
    }

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

@keyframes secondSlideInRight {
    from {
        opacity: 0;
        transform: translateX(0.6rem);
    }

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

@keyframes secondZoomIn {
    from {
        opacity: 0;
        transform: translateY(0.24rem) scale(0.96);
    }

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

@keyframes secondFadeUp {
    from {
        opacity: 0;
        transform: translateY(0.2rem);
    }

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

/* ============================================================
   Catalog 第八屏：FAQ 手风琴（与 About 第八屏完全一致）
   - 高度由内容撑开（不写死），底部内边距 80px
   ============================================================ */
.eighth {
    position: relative;
    width: 100%;
    max-width: 19.2rem;
    margin: 0 auto;
    background: #FFF;
    box-sizing: border-box;
    padding: 0.8rem 2.4rem 0.8rem;
    overflow: hidden;
}

.eighth__inner {
    position: relative;
    max-width: 16.0rem;
    margin: 0 auto;
}

.eighth__title {
    color: #333;
    text-align: center;
    font-family: Inter, sans-serif;
    font-size: 0.40rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    text-transform: capitalize;
    margin: 0 0 0.5rem;
}

.eighth__accordion {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.eighth__item {
    border-radius: 0.1rem;
    background: #F9F9F9;
    padding: 0.3rem;
    transition: background-color 0.3s ease;
}

.eighth__item.is-active {
    background: #F2F9FF;
}

.eighth__question {
    display: flex;
    align-items: center;
    gap: 0.12rem;
    width: 100%;
    padding: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    text-align: left;
}

.eighth__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 0.2rem;
    height: 0.2rem;
    border-radius: 0.02rem;
    flex-shrink: 0;
}

.eighth__icon--q {
    background: #195BA1;
}

.eighth__icon--a {
    background: #B81C22;
}

.eighth__icon img {
    display: block;
    width: 0.1rem;
    object-fit: contain;
}

.eighth__qtext {
    flex: 1;
    min-width: 0;
    color: #333;
    font-family: "Avant Garde", "AvantGarde", sans-serif;
    font-size: 0.2rem;
    font-style: normal;
    font-weight: 700;
    line-height: 1.2;
}

.eighth__arrow {
    display: block;
    width: 0.08rem;
    height: 0.08rem;
    border-right: 0.02rem solid #333;
    border-bottom: 0.02rem solid #333;
    transform: rotate(45deg);
    transition: transform 0.3s ease, border-color 0.3s ease;
    flex-shrink: 0;
}

.eighth__item.is-active .eighth__arrow {
    transform: rotate(-135deg);
    border-color: #B81C22;
}

.eighth__answer {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.35s ease, margin-top 0.35s ease;
    margin-top: 0;
}

.eighth__item.is-active .eighth__answer {
    grid-template-rows: 1fr;
    margin-top: 0.16rem;
}

.eighth__answer-inner {
    display: flex;
    align-items: flex-start;
    gap: 0.12rem;
    overflow: hidden;
}

.eighth__atext {
    color: #999;
    font-family: "Avant Garde Gothic Itc L OT", "Avant Garde", sans-serif;
    font-size: 0.16rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    margin: 0;
    flex: 1;
}

/* ---------- 入场动效（common.js 加 .is-in-view 触发） ---------- */
html.js .eighth:not(.is-in-view) .eighth__title,
html.js .eighth:not(.is-in-view) .eighth__item {
    opacity: 0;
    transform: translateY(0.2rem);
}

.eighth.is-in-view .eighth__title {
    animation: eighthFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0s backwards;
}

.eighth.is-in-view .eighth__item:nth-child(1) {
    animation: eighthFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.1s backwards;
}

.eighth.is-in-view .eighth__item:nth-child(2) {
    animation: eighthFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.18s backwards;
}

.eighth.is-in-view .eighth__item:nth-child(3) {
    animation: eighthFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.26s backwards;
}

.eighth.is-in-view .eighth__item:nth-child(4) {
    animation: eighthFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.34s backwards;
}

.eighth.is-in-view .eighth__item:nth-child(5) {
    animation: eighthFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.42s backwards;
}

.eighth.is-in-view .eighth__item:nth-child(6) {
    animation: eighthFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.5s backwards;
}

@keyframes eighthFadeUp {
    from {
        opacity: 0;
        transform: translateY(0.2rem);
    }

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

/* ---------- H5 适配 ---------- */
html[data-mode="h5"] .eighth {
    padding: 0.6rem 0.3rem;
}

html[data-mode="h5"] .eighth__title {
    font-size: 0.32rem;
    margin-bottom: 0.4rem;
}

html[data-mode="h5"] .eighth__item {
    padding: 0.16rem 0.2rem;
}

html[data-mode="h5"] .eighth__qtext {
    font-size: 0.16rem;
}

html[data-mode="h5"] .eighth__atext {
    font-size: 0.14rem;
}

html[data-mode="h5"] .eighth__icon,
html[data-mode="h5"] .eighth__icon img {
    width: 0.18rem;
    height: 0.18rem;
}

html[data-mode="h5"] .eighth__arrow {
    width: 0.07rem;
    height: 0.07rem;
}

/* 系统开启“减少动态效果”时：直接显示 */
@media (prefers-reduced-motion: reduce) {

    html.js .second:not(.is-in-view)>img:nth-of-type(1),
    html.js .second:not(.is-in-view)>img:nth-of-type(2),
    html.js .second:not(.is-in-view) .second__inner,
    html.js .second:not(.is-in-view) .second__inner h2,
    html.js .second:not(.is-in-view) .second__inner p {
        opacity: 1;
        transform: none;
    }

    .second.is-in-view>img:nth-of-type(1),
    .second.is-in-view>img:nth-of-type(2),
    .second.is-in-view .second__inner,
    .second.is-in-view .second__inner h2,
    .second.is-in-view .second__inner p {
        animation: none;
    }

    html.js .fifth:not(.is-in-view) h2,
    html.js .fifth:not(.is-in-view) span,
    html.js .fifth:not(.is-in-view) p {
        opacity: 1;
        transform: none;
    }

    .fifth.is-in-view h2,
    .fifth.is-in-view span,
    .fifth.is-in-view p {
        animation: none;
    }

    .first__btn:hover,
    .first__btn:active {
        transform: none;
    }

    .first__btn:hover img {
        animation: none;
    }

    html.js .eighth:not(.is-in-view) .eighth__title,
    html.js .eighth:not(.is-in-view) .eighth__item {
        opacity: 1;
        transform: none;
    }

    .eighth.is-in-view .eighth__title,
    .eighth.is-in-view .eighth__item {
        animation: none;
    }
}

/* ============================================================
   Catalog 第四屏：Industries We Serve
   - 结构与 index.html 第四屏完全一致；额外在每个 slide 描述
     下方加了 3 张产品缩略图（.fourth__thumbs）
   ============================================================ */
.fourth {
    position: relative;
    width: 100%;
    max-width: 19.2rem;
    margin: 0 auto;
    height: 9.6rem;
    overflow: hidden;
    background: #0e1a2b;
}

.fourth__bg-layer {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.fourth__bg-slide {
    position: absolute;
    inset: 0;
    background: no-repeat center / cover;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.6s ease;
}

.fourth__bg-slide.is-active {
    opacity: 1;
    animation: fourthBgIn 1.8s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes fourthBgIn {
    from {
        opacity: 0;
        transform: scale(1.15) translateX(0.8rem);
    }

    to {
        opacity: 1;
        transform: scale(1.04) translateX(0);
    }
}

.fourth__shade {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(0, 0, 0, 0.55) 0%, rgba(0, 0, 0, 0.35) 50%, rgba(0, 0, 0, 0.2) 100%);
    pointer-events: none;
}

.fourth__inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 100%;
    max-width: 16.5rem;
    margin: 0 auto;
    box-sizing: border-box;
}

.fourth__left {
    flex: 1;
    max-width: 6.5rem;
}

.fourth__slides {
    position: relative;
}

.fourth__slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    transform: translateY(0.2rem);
    pointer-events: none;
    transition: opacity 0.5s ease, transform 0.5s ease;
    display: flex;
    flex-direction: column;
}

.fourth__slide.is-active {
    position: relative;
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.fourth__title {
    color: #FFF;
    font-family: Inter, sans-serif;
    font-size: 0.4rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin: 0;
}

.fourth__line {
    width: 0.8rem;
    height: 0.06rem;
    background: #B81C22;
    margin: 0.14rem 0;
}

.fourth__desc {
    color: #FFF;
    font-family: Inter, sans-serif;
    font-size: 0.18rem;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    margin: 0 0 0.75rem;
}

/* —— 3 张产品缩略图（catalog 独有） —— */
.fourth__thumbs {
    display: flex;
    gap: 0.16rem;
    margin-bottom: 0.32rem;
}

.fourth__thumb {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 2.48rem;
    flex-shrink: 0;
}

.fourth__thumb img {
    display: block;
    width: 2.48rem;
    height: 1.48rem;
    object-fit: cover;
    background: #FFF;
    border-radius: 0.04rem;
}

.fourth__thumb-name {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.48rem;
    height: 0.6rem;
    background: #FFF;
    color: #666;
    font-family: Inter, sans-serif;
    font-size: 0.14rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    margin: 0;
    text-align: center;
    box-sizing: border-box;
}

.fourth__btn {
    width: max-content;
    position: relative;
    overflow: hidden;
    display: inline-flex;
    padding: 0.18rem 0.4rem;
    justify-content: center;
    align-items: center;
    gap: 0.1rem;
    background: var(--Style, #02347D);
    background-image: linear-gradient(100deg, #0A4BA8 0%, #014ADC 100%);
    background-repeat: no-repeat;
    background-size: 0% 100%;
    background-position: 0 0;
    color: #FFF;
    font-family: Inter, sans-serif;
    font-size: 0.18rem;
    font-style: normal;
    font-weight: 500;
    line-height: normal;
    text-decoration: none;
    transition: background-size 0.45s cubic-bezier(0.22, 0.61, 0.36, 1),
        transform 0.3s cubic-bezier(0.22, 0.61, 0.36, 1),
        box-shadow 0.3s ease,
        border-color 0.3s ease,
        color 0.3s ease;
}

/* 高光扫过层：半透明白色斜条，掠过按钮表面 */
.fourth__btn::after {
    content: "";
    position: absolute;
    top: -30%;
    left: 0;
    width: 34%;
    height: 160%;
    background: linear-gradient(100deg,
            rgba(255, 255, 255, 0) 0%,
            rgba(255, 255, 255, 0.38) 50%,
            rgba(255, 255, 255, 0) 100%);
    transform: translateX(-220%) skewX(-18deg);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.65s cubic-bezier(0.22, 0.61, 0.36, 1), opacity 0.25s ease;
}

.fourth__btn:hover {
    background-size: 100% 100%;
    transform: translateY(-0.02rem);
    box-shadow: 0 0.05rem 0.14rem rgba(2, 52, 125, 0.22);
    filter: none;
    width: max-content;
}

.fourth__btn:hover::after {
    transform: translateX(320%) skewX(-18deg);
    opacity: 1;
}

.fourth__btn:active {
    transform: translateY(0);
    box-shadow: 0 0.01rem 0.04rem rgba(2, 52, 125, 0.16);
    transition-duration: 0.12s;
}

.fourth__right {
    position: relative;
    flex-shrink: 0;
    height: 100%;
    display: flex;
    align-items: center;
}

.fourth__nav-line {
    position: absolute;
    left: 0.065rem;
    width: 0.01rem;
    background: rgba(255, 255, 255, 0.25);
    height: 100%;
}

.fourth__nav {
    list-style: none;
    margin: 0;
    padding: 0;
}

.fourth__nav li {
    display: flex;
    align-items: center;
    gap: 0.18rem;
    padding: 0.24rem 0;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.fourth__nav li:not(.is-active) {
    opacity: 0.6;
}

.fourth__nav li.is-active {
    opacity: 1;
}

.fourth__dot {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 0.14rem;
    height: 0.14rem;
    border-radius: 50%;
    background: #FFF;
    flex-shrink: 0;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.fourth__nav li:not(.is-active) .fourth__dot {
    opacity: 0;
}

.fourth__dot span {
    display: block;
    width: 0.06rem;
    height: 0.06rem;
    border-radius: 50%;
    background: var(--Style, #02347D);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.fourth__nav li.is-active .fourth__dot span {
    opacity: 1;
}

.fourth__nav-text {
    color: #FFF;
    font-family: Inter, sans-serif;
    font-size: 0.22rem;
    font-style: normal;
    font-weight: 600;
    line-height: normal;
    white-space: nowrap;
}

/* ---------- 入场动效 ---------- */
.fourth.is-in-view .fourth__left {
    animation: fourthFadeIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0s backwards;
}

.fourth.is-in-view .fourth__right {
    animation: fourthFadeIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.18s backwards;
}

@keyframes fourthFadeIn {
    from {
        opacity: 0;
        transform: translateY(0.2rem);
    }

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

@media (prefers-reduced-motion: reduce) {

    html.js .fourth:not(.is-in-view) .fourth__left,
    html.js .fourth:not(.is-in-view) .fourth__right {
        opacity: 1;
        transform: none;
    }

    .fourth.is-in-view .fourth__left,
    .fourth.is-in-view .fourth__right {
        animation: none;
    }
}

/* ============================================================
   Catalog 第六屏：Certifications（与 About-Factory 第七屏完全一致）
   - 背景：浅灰 #F5F5F5
   - 左侧图：factory/seventh-img6.webp（542×336）
   - 右侧轮播：320×412，点击左右按钮切换上一张 / 下一张
   ============================================================ */
.sixth {
    position: relative;
    width: 100%;
    max-width: 19.2rem;
    height: 8.68rem;
    margin: 0 auto;
    background: #F5F5F5 url('../assets/images/catalog/sixth-img.webp') no-repeat center / cover;
    box-sizing: border-box;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sixth__inner {
    width: 19.2rem;
    padding-left: 1.6rem;
}

.sixth__body {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    width: 100%;
}

/* ---------- 左栏：标题/描述 + 主图 ---------- */
.sixth__left {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.sixth__header {
    margin-bottom: 0.6rem;
}

.sixth__title {
    color: #333;
    text-align: left;
    font-family: Inter, sans-serif;
    font-size: 0.4rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    text-transform: capitalize;
    margin: 0 0 0.14rem;
}

.sixth__desc {
    color: #666;
    text-align: left;
    font-family: Inter, sans-serif;
    font-size: 0.18rem;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    text-transform: capitalize;
    margin: 0;
}

.sixth__left-img {
    width: 5.42rem;
    height: 3.36rem;
    overflow: hidden;
    /* background: #fff; */
    /* box-shadow: 0 0.02rem 0.08rem rgba(0, 0, 0, 0.06); */
}

.sixth__left-img img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
    will-change: transform;
}

.sixth__left-img:hover img {
    transform: scale(1.06);
}

/* ---------- 右栏：左右切换按钮 + 轮播 ---------- */
.sixth__right {
    position: relative;
    flex: 1;
    min-width: 0;
}

.sixth__nav {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 0.3rem;
    gap: 0.16rem;
    padding-right: 1.6rem;
}

.sixth__nav-btn {
    width: 0.5rem;
    height: 0.5rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: #333;
    cursor: pointer;
    transition: background 0.3s ease, color 0.3s ease, transform 0.2s ease;
}

.sixth__nav-btn svg {
    display: block;
    width: 0.24rem;
    height: 0.24rem;
}

.sixth__nav-btn:hover,
.sixth__nav-btn:focus-visible {
    background: var(--Style, #02347D);
    color: #FFF;
}

.sixth__carousel {
    position: relative;
    width: 100%;
    height: 3.2rem;
    overflow: hidden;
}

.sixth__track {
    display: flex;
    gap: 0.2rem;
    transition: transform 0.5s ease;
}

.sixth__slide {
    position: relative;
    width: 4.12rem;
    height: 3.2rem;
    flex-shrink: 0;
    overflow: hidden;
    transition: transform 0.35s ease, box-shadow 0.35s ease;
}

.sixth__slide img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1);
    transition: transform 0.6s ease;
    will-change: transform;
}

.sixth__slide:hover {
    transform: translateY(-0.04rem);
    box-shadow: 0 0.14rem 0.32rem rgba(2, 52, 125, 0.16);
}

.sixth__slide:hover img {
    transform: scale(1.08);
}

.sixth__slide.is-active {
    box-shadow: 0 0.14rem 0.32rem rgba(2, 52, 125, 0.2);
}

/* ---------- 滚动入场动效（common.js 为 section 添加 .is-in-view 触发） ---------- */
html.js .sixth:not(.is-in-view) .sixth__header,
html.js .sixth:not(.is-in-view) .sixth__left-img,
html.js .sixth:not(.is-in-view) .sixth__right {
    opacity: 0;
    transform: translateY(0.2rem);
}

.sixth.is-in-view .sixth__header {
    animation: sixthFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0s both;
}

.sixth.is-in-view .sixth__left-img {
    animation: sixthFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.1s both;
}

.sixth.is-in-view .sixth__right {
    animation: sixthFadeUp 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.15s both;
}

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

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

/* ---------- H5 适配 ---------- */
html[data-mode="h5"] .sixth {
    height: auto;
    padding: 0.6rem 0.3rem;
}

html[data-mode="h5"] .sixth__inner {
    width: 100%;
    /* 清掉 PC 端的 1.6rem 左内边距，否则窄屏内容被挤出视口 */
    padding-left: 0;
}

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

html[data-mode="h5"] .sixth__title {
    font-size: 0.32rem;
    margin-bottom: 0.1rem;
}

html[data-mode="h5"] .sixth__desc {
    font-size: 0.14rem;
}

html[data-mode="h5"] .sixth__body {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
}

html[data-mode="h5"] .sixth__left {
    width: 100%;
}

html[data-mode="h5"] .sixth__left-img {
    width: 100%;
    height: auto;
    aspect-ratio: 542 / 336;
}

html[data-mode="h5"] .sixth__right {
    width: 100%;
}

html[data-mode="h5"] .sixth__nav {
    position: static;
    margin-bottom: 0.2rem;
    padding-right: 0;
    justify-content: center;
}

html[data-mode="h5"] .sixth__carousel {
    height: 4.12rem;
}

html[data-mode="h5"] .sixth__slide:hover,
html[data-mode="h5"] .sixth__left-img:hover img {
    transform: none;
    box-shadow: 0 0.02rem 0.08rem rgba(0, 0, 0, 0.06);
}

html[data-mode="h5"] .sixth__slide:hover img {
    transform: none;
}

/* 系统开启"减少动态效果"时：直接显示 */
@media (prefers-reduced-motion: reduce) {

    html.js .sixth:not(.is-in-view) .sixth__header,
    html.js .sixth:not(.is-in-view) .sixth__left-img,
    html.js .sixth:not(.is-in-view) .sixth__right {
        opacity: 1;
        transform: none;
    }
}

/* ============================================================
   Catalog 第七屏：Why Source Steel Plate From Xin Wugang Steel
   - 高度 9.6rem，内容垂直居中，背景复用 sixth-img.webp
   - 中间 4.95rem × 4.95rem 钢卷图，两侧文字向图片对齐（间距 1.32rem）
   - 默认：Gabarito 标题 0.24rem / 描述 0.16rem，横线 #E4E4E4 3.4rem × 0.04rem
   - 悬浮 / 选中：标题上方显示图标（0.43rem，距标题 0.2rem），标题与横线变 #02347D
   ============================================================ */
.seventh {
    position: relative;
    width: 100%;
    max-width: 19.2rem;
    height: 9.6rem;
    margin: 0 auto;
    background: #F5F5F5 url('../assets/images/catalog/sixth-img.webp') no-repeat center / cover;
    box-sizing: border-box;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.seventh__inner {
    width: 100%;
    padding: 0 1.6rem;
    box-sizing: border-box;
}

.seventh__title {
    color: #333;
    text-align: center;
    font-family: Inter, sans-serif;
    font-size: 0.4rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    text-transform: capitalize;
    margin-bottom: 0.14rem;
}

.seventh__desc {
    color: #666;
    text-align: center;
    font-family: Inter, sans-serif;
    font-size: 0.18rem;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    text-transform: capitalize;
    margin-bottom: 0.62rem;
}

.seventh__body {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.32rem;
}

.seventh__col {
    flex-shrink: 0;
    width: 3.4rem;
    display: flex;
    flex-direction: column;
    gap: 1.4rem;
}

.seventh__col--left .seventh__item {
    text-align: right;
}

.seventh__col--right .seventh__item {
    text-align: left;
}

.seventh__item {
    position: relative;
    cursor: pointer;
}

.seventh__item-title {
    position: relative;
    color: #333;
    font-family: Gabarito, Inter, sans-serif;
    font-size: 0.24rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    margin-bottom: 0.08rem;
    transition: color 0.3s ease;
}

/* 标题上方绝对定位图标：默认隐藏，悬浮 / 选中后显示 */
.seventh__icon {
    position: absolute;
    bottom: calc(100% + 0.2rem);
    width: 0.43rem;
    height: 0.43rem;
    opacity: 0;
    transform: translateY(0.1rem);
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
}

.seventh__col--left .seventh__icon {
    right: 0;
}

.seventh__col--right .seventh__icon {
    left: 0;
}

.seventh__item-desc {
    color: #333;
    font-family: Gabarito, Inter, sans-serif;
    font-size: 0.16rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    transition: color 0.3s ease;
}

.seventh__line {
    display: block;
    width: 3.4rem;
    height: 0.04rem;
    background: #E4E4E4;
    margin-top: 0.18rem;
    transition: background-color 0.3s ease;
}

/* ---------- 悬浮 / 选中态 ---------- */
.seventh__item:hover .seventh__item-title,
.seventh__item.is-active .seventh__item-title {
    color: #02347D;
}

.seventh__item:hover .seventh__icon,
.seventh__item.is-active .seventh__icon {
    opacity: 1;
    transform: translateY(0);
}

.seventh__item:hover .seventh__line,
.seventh__item.is-active .seventh__line {
    background: #02347D;
}

/* 中间图片悬浮动效 */
.seventh__pic {
    flex-shrink: 0;
    width: 4.95rem;
    height: 4.95rem;
}

.seventh__pic img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.seventh__pic:hover img {
    transform: scale(1.04) rotate(6deg);
}

/* ---------- 滚动入场动效（common.js 为 section 添加 .is-in-view 触发） ---------- */
html.js .seventh:not(.is-in-view) .seventh__title,
html.js .seventh:not(.is-in-view) .seventh__desc,
html.js .seventh:not(.is-in-view) .seventh__pic,
html.js .seventh:not(.is-in-view) .seventh__item {
    opacity: 0;
    transform: translateY(0.2rem);
}

.seventh.is-in-view .seventh__title {
    animation: seventhFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0s both;
}

.seventh.is-in-view .seventh__desc {
    animation: seventhFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.1s both;
}

.seventh.is-in-view .seventh__pic {
    animation: seventhFadeUp 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.15s both;
}

.seventh.is-in-view .seventh__col--left .seventh__item:nth-child(1) {
    animation: seventhFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.25s both;
}

.seventh.is-in-view .seventh__col--left .seventh__item:nth-child(2) {
    animation: seventhFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.35s both;
}

.seventh.is-in-view .seventh__col--right .seventh__item:nth-child(1) {
    animation: seventhFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.25s both;
}

.seventh.is-in-view .seventh__col--right .seventh__item:nth-child(2) {
    animation: seventhFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.35s both;
}

@keyframes seventhFadeUp {
    from {
        opacity: 0;
        transform: translateY(0.2rem);
    }

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

/* 系统开启"减少动态效果"时：直接显示 */
@media (prefers-reduced-motion: reduce) {

    html.js .seventh:not(.is-in-view) .seventh__title,
    html.js .seventh:not(.is-in-view) .seventh__desc,
    html.js .seventh:not(.is-in-view) .seventh__pic,
    html.js .seventh:not(.is-in-view) .seventh__item {
        opacity: 1;
        transform: none;
    }

    .seventh.is-in-view .seventh__title,
    .seventh.is-in-view .seventh__desc,
    .seventh.is-in-view .seventh__pic,
    .seventh.is-in-view .seventh__item {
        animation: none;
    }
}

/* ---------- H5 适配 ---------- */
html[data-mode="h5"] .seventh {
    height: auto;
    padding: 0.6rem 0.3rem;
}

html[data-mode="h5"] .seventh__inner {
    padding: 0;
}

html[data-mode="h5"] .seventh__title {
    font-size: 0.32rem;
}

html[data-mode="h5"] .seventh__desc {
    font-size: 0.14rem;
    margin-bottom: 0.4rem;
}

html[data-mode="h5"] .seventh__body {
    flex-direction: column;
    gap: 0.4rem;
}

html[data-mode="h5"] .seventh__pic {
    order: -1;
    width: 100%;
    height: auto;
    aspect-ratio: 1 / 1;
}

html[data-mode="h5"] .seventh__col {
    width: 100%;
    gap: 0.5rem;
}

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

html[data-mode="h5"] .seventh__item-desc {
    font-size: 0.14rem;
}

html[data-mode="h5"] .seventh__line {
    width: 100%;
}

html[data-mode="h5"] .seventh__pic:hover img {
    transform: none;
}

/* ============================================================
   Catalog 第三屏：Browse Our Steel Plate & Sheet Categories
   - 顶部标题/描述，下方 3×2 卡片网格
   - 卡片：固定 7.85rem × 3.98rem，padding 0.4rem，圆角 0.1rem
   - 卡片左侧：标题 + 描述 + 标签；右侧：产品图；底部：Learn More
   - 按钮悬浮采用首页 .first__btn 同款渐变铺满 + 高光扫过 + 发光阴影
   ============================================================ */
.third {
    position: relative;
    width: 100%;
    max-width: 19.2rem;
    margin: 0 auto;
    box-sizing: border-box;
    padding: 0.8rem 1.6rem;
    background: #FFF;
    overflow: hidden;
}

.third__inner {
    width: 100%;
    max-width: 16.0rem;
    margin: 0 auto;
}

/* ---------- 顶部：标题 + 描述 ---------- */
.third__head {
    text-align: center;
    margin-bottom: 0.5rem;
}

.third__title {
    color: #333;
    text-align: center;
    font-family: Inter, sans-serif;
    font-size: 0.4rem;
    font-style: normal;
    font-weight: 700;
    line-height: normal;
    text-transform: capitalize;
    margin: 0 0 0.14rem;
}

.third__desc {
    color: #666;
    text-align: center;
    font-family: Inter, sans-serif;
    font-size: 0.18rem;
    font-style: normal;
    font-weight: 400;
    line-height: normal;
    text-transform: capitalize;
    margin: 0 0 0.5rem;
}

/* ---------- 卡片网格 3×2 ---------- */
.third__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.3rem;
}

/* ---------- 单张卡片 ---------- */
.third__card {
    position: relative;
    padding: 0.4rem;
    width: 100%;
    height: 3.98rem;
    box-sizing: border-box;
    border-radius: 0.1rem;
    background: #F1F1F1;
    overflow: hidden;
    isolation: isolate;
    transition:
        transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.45s cubic-bezier(0.22, 1, 0.36, 1),
        background-color 0.45s ease;
    will-change: transform, box-shadow;
}

/* 卡片入场前的初始隐藏态 */
html.js .third:not(.is-in-view) .third__card {
    opacity: 0;
    transform: translateY(0.24rem) scale(0.98);
}

/* 卡片悬浮：上浮 + 柔和阴影 + 微微加亮，避免突兀的大阴影 */
.third__card:hover {
    transform: translateY(-0.06rem);
    box-shadow:
        0 0.04rem 0.12rem rgba(2, 52, 125, 0.08),
        0 0.18rem 0.4rem rgba(2, 52, 125, 0.12);
    background-color: #FAFAFA;
}

/* 卡片内容容器：占据左半部分 */
.third__card-body {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
}

.third__card-title {
    color: #000;
    font-family: Inter, sans-serif;
    font-size: 0.26rem;
    font-style: normal;
    font-weight: 600;
    line-height: 150%;
    text-transform: capitalize;
    margin: 0 0 0.1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.third__card-text {
    color: #666;
    font-family: Inter, sans-serif;
    font-size: 0.14rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    text-transform: capitalize;
    margin: 0 0 0.14rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ---------- 标签组 ---------- */
.third__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.1rem;
    max-height: 1.3rem;
    overflow: hidden;
    align-content: flex-start;
}

.third__tag {
    display: inline-flex;
    align-items: center;
    max-width: 100%;
    border-radius: 0.02rem;
    background: #D9E1EC;
    padding: 0.05rem 0.2rem;
    color: #02347D;
    font-family: Inter, sans-serif;
    font-size: 0.14rem;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    white-space: nowrap;
    transition:
        background-color 0.3s ease,
        color 0.3s ease;
}

.third__card:hover .third__tag {
    background: #C5D1E6;
}

/* ---------- 卡片背景图 ---------- */
/* 图片为整卡背景层：铺满卡片、置于最底层，悬浮时缓慢放大 */
.third__card-img {
    position: absolute;
    inset: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    pointer-events: none;
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

/* 背景图上的浅色渐变遮罩：左侧保持 #F1F1F1 实色保证文字可读，右侧透出图片 */
.third__card::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(90deg,
            #F1F1F1 0%,
            rgba(241, 241, 241, 0.96) 38%,
            rgba(241, 241, 241, 0.55) 62%,
            rgba(241, 241, 241, 0.12) 100%);
    pointer-events: none;
    transition: opacity 0.45s ease;
}

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

/* 悬浮时遮罩略微变淡，让背景图更清晰 */
.third__card:hover::before {
    opacity: 0.85;
}

/* ---------- Learn More 按钮（绝对定位） ---------- */
/* 与首页 .first__btn 同款：渐变铺满 + 高光扫过 + 上浮发光 */
.third__btn {
    position: absolute;
    left: 0.4rem;
    bottom: 0.4rem;
    z-index: 3;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.16rem 0.32rem;
    background: var(--Style, #02347D);
    color: #FFF;
    font-family: Inter, sans-serif;
    font-size: 0.16rem;
    font-style: normal;
    font-weight: 500;
    line-height: 1;
    text-decoration: none;
    text-transform: capitalize;
    overflow: hidden;
    isolation: isolate;
    transition:
        transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.35s ease;
}

/* 高光扫过层 */
.third__btn::before {
    content: "";
    position: absolute;
    top: 0;
    left: -120%;
    z-index: 2;
    width: 60%;
    height: 100%;
    background: linear-gradient(120deg,
            transparent 0%,
            rgba(255, 255, 255, 0.45) 50%,
            transparent 100%);
    transform: skewX(-20deg);
    transition: left 0.75s cubic-bezier(0.22, 1, 0.36, 1);
    pointer-events: none;
}

/* 渐变底色（默认藏于左侧外，悬浮时铺满） */
.third__btn::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(135deg, #00B8E2 0%, #0063C3 100%);
    transform: translateX(-101%);
    transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
    pointer-events: none;
}

.third__btn:hover {
    transform: translateY(-0.02rem);
    box-shadow: 0 0.04rem 0.1rem rgba(0, 99, 195, 0.22);
}

.third__btn:hover::before {
    left: 120%;
}

.third__btn:hover::after {
    transform: translateX(0);
}

.third__btn:active {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 0.02rem 0.06rem rgba(0, 99, 195, 0.18);
}

/* ---------- 滚动入场动效（common.js 加 .is-in-view 触发） ---------- */
.third.is-in-view .third__head {
    animation: thirdFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0s backwards;
}

/* 6 张卡片错峰入场：每张间隔 0.08s */
.third.is-in-view .third__card:nth-child(1) {
    animation: thirdFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.10s backwards;
}

.third.is-in-view .third__card:nth-child(2) {
    animation: thirdFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.18s backwards;
}

.third.is-in-view .third__card:nth-child(3) {
    animation: thirdFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.26s backwards;
}

.third.is-in-view .third__card:nth-child(4) {
    animation: thirdFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.34s backwards;
}

.third.is-in-view .third__card:nth-child(5) {
    animation: thirdFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.42s backwards;
}

.third.is-in-view .third__card:nth-child(6) {
    animation: thirdFadeUp 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.50s backwards;
}

@keyframes thirdFadeUp {
    from {
        opacity: 0;
        transform: translateY(0.24rem) scale(0.98);
    }

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

/* ============================================================
   H5 移动端适配
   - 网格降为单列
   - 卡片高度自适应，图片显示在内容下方
   - 简化悬浮效果（避免移动端抖动）
   ============================================================ */
html[data-mode="h5"] .third {
    padding: 0.6rem 0.3rem;
}

html[data-mode="h5"] .third__title {
    font-size: 0.32rem;
    margin-bottom: 0.1rem;
}

html[data-mode="h5"] .third__desc {
    font-size: 0.14rem;
    margin-bottom: 0.3rem;
}

html[data-mode="h5"] .third__grid {
    grid-template-columns: 1fr;
    gap: 0.2rem;
}

html[data-mode="h5"] .third__card {
    height: auto;
    min-height: 3.6rem;
    padding: 0.24rem;
    display: flex;
    flex-direction: column;
}

html[data-mode="h5"] .third__card-body {
    width: 100%;
    max-width: 100%;
}

html[data-mode="h5"] .third__card-title {
    font-size: 0.22rem;
    white-space: normal;
}

html[data-mode="h5"] .third__card-text {
    font-size: 0.13rem;
    -webkit-line-clamp: 2;
    line-clamp: 2;
}

html[data-mode="h5"] .third__tag {
    font-size: 0.12rem;
    padding: 0.04rem 0.14rem;
}

/* H5：卡片改为纵向布局，背景图仍做底层铺满，遮罩整体压暗保证可读 */
html[data-mode="h5"] .third__card::before {
    background: linear-gradient(180deg,
            rgba(241, 241, 241, 0.97) 0%,
            rgba(241, 241, 241, 0.88) 55%,
            rgba(241, 241, 241, 0.6) 100%);
}

html[data-mode="h5"] .third__btn {
    z-index: 3;
    align-self: flex-start;
    margin-top: 0.16rem;
    font-size: 0.14rem;
    padding: 0.12rem 0.24rem;
}

html[data-mode="h5"] .third__card:hover {
    transform: none;
    box-shadow: none;
    background-color: #F1F1F1;
}

html[data-mode="h5"] .third__card:hover .third__card-img {
    transform: none;
}

/* ============================================================
   H5 适配：第四屏 Industries We Serve
   - 与 index.css 第四屏适配一致；额外处理 catalog 独有的
     3 张产品缩略图（等分一行，防止固定宽度溢出）
   ============================================================ */
html[data-mode="h5"] .fourth {
    height: auto;
    min-height: 10rem;
    padding: 0.6rem 0.4rem;
}

html[data-mode="h5"] .fourth__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
    padding: 0;
}

html[data-mode="h5"] .fourth__left {
    max-width: none;
    width: 100%;
}

html[data-mode="h5"] .fourth__title {
    font-size: 0.32rem;
}

html[data-mode="h5"] .fourth__line {
    margin: 0.12rem 0;
}

html[data-mode="h5"] .fourth__desc {
    font-size: 0.22rem;
    margin-bottom: 0.4rem;
}

/* 缩略图：3 张等分一行，去掉固定宽度 */
html[data-mode="h5"] .fourth__thumbs {
    gap: 0.16rem;
    margin-bottom: 0.32rem;
}

html[data-mode="h5"] .fourth__thumb {
    width: calc((100% - 0.32rem) / 3);
}

html[data-mode="h5"] .fourth__thumb img {
    width: 100%;
    height: 1.3rem;
}

html[data-mode="h5"] .fourth__thumb-name {
    width: 100%;
    height: auto;
    padding: 0.08rem 0.06rem;
    font-size: 0.16rem;
}

html[data-mode="h5"] .fourth__btn {
    font-size: 0.2rem;
    padding: 0.14rem 0.32rem;
}

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

html[data-mode="h5"] .fourth__nav li {
    padding: 0.18rem 0;
}

/* ============================================================
   H5 适配：第五屏 Browse Our Steel Plate & Sheet Categories
   - 固定宽高改自适应；<br> 强制换行在窄屏取消
   ============================================================ */
html[data-mode="h5"] .fifth {
    height: auto;
    min-height: 6rem;
    padding: 0.7rem 0.4rem;
    box-sizing: border-box;
}

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

html[data-mode="h5"] .fifth h2 {
    width: auto;
    font-size: 0.32rem;
    margin-bottom: 0.12rem;
}

html[data-mode="h5"] .fifth span {
    width: auto;
    font-size: 0.2rem;
    margin-bottom: 0.4rem;
}

html[data-mode="h5"] .fifth p {
    width: auto;
    font-size: 0.2rem;
}

/* ============================================================
   系统开启"减少动态效果"：直接显示，不做入场/悬浮变换
   ============================================================ */
@media (prefers-reduced-motion: reduce) {

    html.js .third:not(.is-in-view) .third__card,
    html.js .third:not(.is-in-view) .third__head {
        opacity: 1;
        transform: none;
    }

    .third.is-in-view .third__head,
    .third.is-in-view .third__card {
        animation: none;
    }

    .third__card:hover,
    .third__card:hover .third__card-img {
        transform: none;
    }

    .third__btn:hover,
    .third__btn:active {
        transform: none;
    }
}