* {
/* ===== Report download section ===== */
.report-section {
    position: relative;
}

.home-report-section,
.about-report-section {
    padding: 44px;
    border-radius: 24px;
    background: rgba(255, 255, 255, .92);
    border: 1px solid rgba(230, 237, 245, .95);
    box-shadow: var(--shadow-sm);
}

.about-report-section {
    margin-top: 28px;
}

.report-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.report-card {
    display: grid;
    grid-template-columns: 58px minmax(0, 1fr) auto;
    align-items: center;
    gap: 16px;
    padding: 22px;
    border-radius: 18px;
    background: linear-gradient(145deg, #ffffff 0%, #f8fcff 100%);
    border: 1px solid #eaf1f6;
    box-shadow: 0 10px 24px rgba(15, 23, 42, .055);
    transition: transform .24s ease, box-shadow .24s ease, border-color .24s ease;
}

.report-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 191, 165, .28);
    box-shadow: var(--shadow-md);
}

.report-icon {
    width: 58px;
    height: 58px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: linear-gradient(135deg, #ff6b6b, #ff9f43);
    color: #fff;
    font-size: 14px;
    font-weight: 950;
    letter-spacing: .02em;
}

.report-info {
    min-width: 0;
}

.report-info strong {
    display: block;
    margin-bottom: 6px;
    color: #111827;
    font-size: 17px;
    font-weight: 950;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.report-info p {
    color: #667085;
    font-size: 13px;
    line-height: 1.6;
    margin: 0;
}

.report-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    min-width: 74px;
    padding: 0 16px;
    border-radius: 999px;
    background: #ecfdf9;
    color: #00a896;
    text-decoration: none;
    font-size: 14px;
    font-weight: 900;
    transition: .22s;
}

.report-download:hover {
    background: #00bfa5;
    color: #fff;
    transform: translateY(-1px);
}

@media (max-width: 1240px) {
    .report-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 700px) {
    .home-report-section,
    .about-report-section {
        padding: 28px 18px;
    }

    .report-card {
        grid-template-columns: 48px 1fr;
    }

    .report-icon {
        width: 48px;
        height: 48px;
        border-radius: 14px;
        font-size: 12px;
    }

    .report-download {
        grid-column: 1 / -1;
        width: 100%;
    }
}
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
}

:root {
    --brand: #00bfa5;
    --brand-dark: #009b88;
    --brand-soft: #e9fbf7;
    --blue: #4aa8f0;
    --text: #101828;
    --muted: #667085;
    --line: #e6edf5;
    --card: #ffffff;
    --shadow-sm: 0 8px 24px rgba(15, 23, 42, .06);
    --shadow-md: 0 18px 46px rgba(15, 23, 42, .10);
}

html {
    scroll-behavior: smooth;
}

body {
    background: radial-gradient(circle at 12% 0, rgba(74, 168, 240, .12), transparent 30%),
    linear-gradient(180deg, #f8fbff 0%, #f7faf9 46%, #ffffff 100%);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

.nav {
    width: 1200px;
    margin: 20px auto;
    display: flex;
    align-items: center;
    padding: 14px 24px;
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.nav-logo {
    flex: 1;
}

.nav-logo img {
    height: 44px;
}

.nav-menu {
    display: flex;
    gap: 28px;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-size: 15px;
}

/* 导航选中高亮样式 */
.nav-menu a.active {
    color: #00bfa5; /* 和原有高亮颜色一致 */
    font-weight: bold;
    border-bottom: 2px solid #00bfa5; /* 可选：加底部下划线，更醒目 */
}

/* 鼠标悬浮样式（可选，增强体验） */
.nav-menu a:hover {
    color: #00a896;
}

.footer {
    background: #f5f5f5;
    padding: 20px 0;
    text-align: center;
    margin-top: 50px;
    font-size: 14px;
    color: #666;
}

/* 首页 banner 样式 */
.banner {
    width: 100%;
    height: 450px;
    /* 浅蓝渐变（清爽柔和，适配白色文字） */
    background: linear-gradient(to right, #64B5F6, #90CAF9);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.banner-inner {
    width: 1200px;
    margin: 0 auto;
    padding-left: 40px;
}

.banner h1 {
    font-size: 42px;
    color: #fff; /* 白色文字和浅蓝背景对比清晰 */
    margin-bottom: 16px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1); /* 轻微阴影增强可读性 */
}

.banner p {
    font-size: 18px;
    color: #fff;
    margin-bottom: 24px;
    opacity: 0.95;
}

.banner .tags {
    display: flex;
    gap: 18px;
    color: #fff;
    font-size: 14px;
}

.banner .tags span {
    background: rgba(255, 255, 255, 0.25); /* 浅透明白色标签，适配浅蓝背景 */
    padding: 6px 12px;
    border-radius: 20px;
}

.section {
    width: 1200px;
    margin: 60px auto;
}

.title {
    text-align: center;
    font-size: 28px;
    margin-bottom: 50px;
    color: #222;
}

.hot-products-section {
    position: relative;
    width: 100%;
    margin: 70px auto 0;
    padding: 70px max(28px, calc((100% - 1200px) / 2)) 84px;
    background: linear-gradient(180deg, #fbfcfe 0%, #f5f7fa 100%);
}

.hot-products-section .title {
    position: relative;
    margin-bottom: 46px;
    padding-bottom: 18px;
    color: #111;
    font-size: 32px;
    font-weight: 900;
    letter-spacing: .02em;
}

.hot-products-section .title::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0;
    width: 72px;
    height: 5px;
    border-radius: 999px;
    background: linear-gradient(90deg, #73bdf0 0%, #00bfa5 100%);
    transform: translateX(-50%);
}

.hot-products-section .product-list {
    gap: 34px;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
}

.hot-products-section .product {
    position: relative;
    min-height: 430px;
    border: 1px solid rgba(226, 232, 240, .86);
    border-radius: 26px;
    background: rgba(255, 255, 255, .96);
    overflow: hidden;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.055);
    transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease;
}

.hot-products-section .product::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    border-radius: inherit;
    background: linear-gradient(135deg, rgba(255, 255, 255, .9), rgba(115, 189, 240, .08));
    opacity: 0;
    transition: opacity .28s ease;
}

.hot-products-section .product:hover {
    transform: translateY(-8px);
    border-color: rgba(115, 189, 240, .5);
    box-shadow: 0 28px 62px rgba(15, 23, 42, 0.105);
}

.hot-products-section .product:hover::before {
    opacity: 1;
}

.hot-products-section .product-card-link {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-rows: auto 1fr;
    height: 100%;
    color: inherit;
    text-decoration: none;
}

.hot-products-section .product-card-link:hover,
.hot-products-section .product-card-link:focus {
    color: inherit;
    text-decoration: none;
}

.hot-products-section .product img,
.hot-products-section .product-cover-placeholder {
    width: calc(100% - 36px);
    margin: 18px 18px 0;
    border-radius: 20px;
    aspect-ratio: 4 / 3;
    background: #f4f8fb;
}

.hot-products-section .product img {
    object-fit: cover;
    box-shadow: inset 0 0 0 1px rgba(226, 232, 240, .8);
    transition: transform .36s ease, filter .36s ease;
}

.hot-products-section .product-card-link:hover img {
    transform: scale(1.025);
    filter: saturate(1.05) contrast(1.02);
}

.hot-products-section .product .info {
    padding: 24px 28px 30px;
    align-items: center;
    text-align: center;
    background: transparent;
}

.hot-products-section .product .name {
    max-width: 100%;
    margin-bottom: 12px;
    font-size: 21px;
    line-height: 1.42;
    font-weight: 900;
    color: #111827;
    letter-spacing: .01em;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.hot-products-section .product .price {
    margin-bottom: 14px;
    color: #e60012;
    font-size: 24px;
    line-height: 1.1;
    font-weight: 900;
}

.hot-products-section .product .intro {
    color: #687385;
    font-size: 15px;
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.hot-products-section .product .intro::after {
    content: "";
    display: block;
    width: 42px;
    height: 3px;
    margin: 18px auto 0;
    border-radius: 999px;
    background: #dbeafe;
}

.features {
    display: flex;
    justify-content: space-between;
}

.feature {
    width: 22%;
    background: #fff;
    padding: 30px 20px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.feature .icon {
    font-size: 36px;
    margin-bottom: 14px;
    color: #00bfa5;
}

.feature h3 {
    font-size: 16px;
    margin-bottom: 6px;
}

.feature p {
    font-size: 13px;
    color: #666;
}

.product-list {
    display: grid;
    grid-template-columns:repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    align-items: stretch;
}

.product {
    background: #fff;
    border: 1px solid #edf1f5;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(15, 23, 42, 0.06);
    transition: 0.22s;
    display: grid;
    grid-template-rows:auto 1fr;
    min-height: 420px;
}

.product:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 28px rgba(15, 23, 42, 0.10);
}

.product-image-button {
    width: 100%;
    height: auto;
    padding: 0;
    margin: 0;
    border: 0;
    border-radius: 0;
    background: #f3f6f8;
    box-shadow: none;
    cursor: zoom-in;
    display: block;
    overflow: hidden;
}

.product img {
    width: 100%;
    aspect-ratio: 4 / 3;
    height: auto;
    object-fit: cover;
    display: block;
    transition: 0.25s;
}

.product-image-button:hover img {
    transform: scale(1.03);
}

.product-cover-placeholder {
    width: 100%;
    aspect-ratio: 4 / 3;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #eef4f7;
    color: #8a98a8;
    font-size: 14px;
}

.product .info {
    padding: 20px 22px 22px;
    display: flex;
    flex-direction: column;
}

.product .name {
    font-size: 18px;
    line-height: 1.45;
    margin-bottom: 8px;
    font-weight: 600;
    color: #222;
}

.product .price {
    color: #e53935;
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 10px;
}

.product .intro {
    color: #666;
    font-size: 14px;
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.empty-product {
    text-align: center;
    padding: 52px 20px;
    background: #fff;
    border: 1px dashed #d9e2ea;
    border-radius: 12px;
    color: #8a98a8;
}

.image-viewer {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
}

.image-viewer.open {
    display: block;
}

.image-viewer-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, .78);
}

.image-viewer-panel {
    position: absolute;
    inset: 32px;
    display: grid;
    grid-template-rows:auto minmax(0, 1fr) auto;
    background: #111827;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 24px 70px rgba(0, 0, 0, .35);
}

.image-viewer-head {
    height: 54px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 0 18px 0 22px;
    color: #fff;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
}

.image-viewer-title {
    font-size: 16px;
    font-weight: 700;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.image-viewer-close,
.image-viewer-nav,
.image-viewer-thumbs button {
    width: auto;
    padding: 0;
    margin: 0;
    border: 0;
    box-shadow: none;
}

.image-viewer-close {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .12);
    color: #fff;
    font-size: 28px;
    line-height: 34px;
}

.image-viewer-stage {
    position: relative;
    min-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 18px 72px;
}

.image-viewer-stage img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 4px;
}

.image-viewer-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 64px;
    border-radius: 8px;
    background: rgba(255, 255, 255, .12);
    color: #fff;
    font-size: 44px;
    line-height: 58px;
}

.image-viewer-nav:hover,
.image-viewer-close:hover {
    background: rgba(255, 255, 255, .22);
}

.image-viewer-prev {
    left: 18px;
}

.image-viewer-next {
    right: 18px;
}

.image-viewer-foot {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 10px 18px 14px;
    border-top: 1px solid rgba(255, 255, 255, .08);
}

.image-viewer-count {
    min-width: 54px;
    color: rgba(255, 255, 255, .72);
    font-size: 13px;
    text-align: center;
}

.image-viewer-thumbs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    max-width: min(720px, 72vw);
}

.image-viewer-thumbs button {
    width: 62px;
    height: 46px;
    border-radius: 6px;
    overflow: hidden;
    background: transparent;
    opacity: .62;
    border: 2px solid transparent;
    flex: 0 0 auto;
}

.image-viewer-thumbs button.active {
    opacity: 1;
    border-color: #00bfa5;
}

.image-viewer-thumbs img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

@media (max-width: 900px) {
    .nav, .container, .section {
        width: calc(100% - 24px);
    }

    .nav {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
    }

    .nav-menu {
        flex-wrap: wrap;
        gap: 14px 20px;
    }

    .product-list {
        grid-template-columns:1fr;
    }

    .product {
        min-height: 0;
    }

    .image-viewer-panel {
        inset: 10px;
    }

    .image-viewer-stage {
        padding: 12px 52px;
    }

    .image-viewer-nav {
        width: 36px;
        height: 54px;
        font-size: 36px;
    }

    .image-viewer-prev {
        left: 10px;
    }

    .image-viewer-next {
        right: 10px;
    }

    .image-viewer-foot {
        flex-direction: column;
        gap: 8px;
    }
}

/* 内页卡片样式 */
.container {
    width: 1200px;
    margin: 60px auto;
}

.card {
    background: #fff;
    padding: 60px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.card h1 {
    font-size: 30px;
    margin-bottom: 30px;
    color: #222;
}

.card p {
    font-size: 16px;
    line-height: 2;
    color: #444;
    margin-bottom: 16px;
}

/* 关于我们页面 */
.about-page {
    margin-top: 42px;
}

.about-card {
    position: relative;
    overflow: hidden;
    padding: 0;
    border: 1px solid #edf1f5;
    background: linear-gradient(180deg, #ffffff 0%, #fbfefd 100%);
}

.about-card::before {
    content: "";
    position: absolute;
    top: -90px;
    right: -90px;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: rgba(0, 191, 165, .10);
}

.about-head {
    position: relative;
    padding: 54px 60px 28px;
    border-bottom: 1px solid #eef5f4;
}

.about-eyebrow {
    display: inline-flex;
    align-items: center;
    height: 28px;
    padding: 0 12px;
    margin-bottom: 14px;
    border-radius: 999px;
    background: #ecfdf9;
    color: #00a896;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .08em;
}

.about-head h1 {
    margin-bottom: 0;
    font-size: 32px;
    color: #111827;
}

.about-content {
    position: relative;
    margin: 34px 60px 60px;
    padding: 30px 34px;
    border-left: 5px solid #00bfa5;
    border-radius: 14px;
    background: linear-gradient(135deg, #f8fffd 0%, #ffffff 70%);
    box-shadow: 0 10px 28px rgba(15, 23, 42, .06);
    color: #3f4a56;
    font-size: 16px;
    line-height: 2.05;
    white-space: pre-wrap;
    word-break: break-word;
}

.about-content p {
    margin-bottom: 14px;
}

.about-content p:last-child {
    margin-bottom: 0;
}

@media (max-width: 700px) {
    .about-head {
        padding: 36px 24px 22px;
    }

    .about-head h1 {
        font-size: 26px;
    }

    .about-content {
        margin: 24px 20px 34px;
        padding: 22px 20px;
        font-size: 15px;
        line-height: 1.9;
    }
}

/* 留言板样式 */
.form-box {
    width: 520px;
    background: #fff;
    padding: 50px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.form-box h1 {
    font-size: 26px;
    margin-bottom: 30px;
    text-align: center;
}

.form-item {
    margin-bottom: 20px;
}

.form-item label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: #333;
}

.form-item input, .form-item textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
}

.form-item textarea {
    height: 120px;
    resize: none;
}

button {
    width: 100%;
    padding: 14px;
    background: #00bfa5;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 10px;
}

.success {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: #67c23a;
    color: #fff;
    padding: 12px 24px;
    border-radius: 6px;
    display: none;
    z-index: 999;
}

/* 联系我们 */
.contact-card {
    background: #fff;
    padding: 60px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.contact-card h1 {
    font-size: 30px;
    margin-bottom: 40px;
    color: #222;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 24px;
    font-size: 16px;
}

.contact-item .icon {
    font-size: 20px;
    width: 30px;
    color: #00bfa5;
}

.contact-item span {
    color: #333;
    font-weight: 500;
}

/* 工程案例专属样式（可选） */
.case-card {
    border: 1px solid #e8f4f8;
}

.case-card .info {
    padding: 16px;
    background: #f8fcff;
}

.case-hero {
    width: 1200px;
    margin: 36px auto 20px;
    background: linear-gradient(135deg, #73bdf0 0%, #7bc3f2 100%);
    border-radius: 18px;
    padding: 44px 48px;
    color: #fff;
    box-shadow: 0 16px 34px rgba(115, 189, 240, .22);
}

.case-hero h1 {
    font-size: 34px;
    margin-bottom: 10px;
}

.case-hero p {
    font-size: 16px;
    opacity: .92;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 22px rgba(15, 23, 42, .07);
    transition: .25s;
    border: 1px solid #eef2f7;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 14px 34px rgba(15, 23, 42, .12);
}

.case-card a {
    display: block;
    color: inherit;
    text-decoration: none;
}

.case-cover {
    height: 210px;
    background: #f3f4f6;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #98a2b3;
}

.case-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: .35s;
}

.case-card:hover .case-cover img {
    transform: scale(1.04);
}

.case-info {
    padding: 18px 18px 20px;
    background: #fff;
}

.case-name {
    font-size: 17px;
    font-weight: 800;
    color: #111827;
    margin-bottom: 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.empty-case {
    background: #fff;
    border-radius: 16px;
    padding: 70px 20px;
    text-align: center;
    color: #98a2b3;
    box-shadow: 0 4px 20px rgba(0, 0, 0, .05);
}

.back-btn {
    display: inline-block;
    margin-bottom: 16px;
    color: #00bfa5;
    text-decoration: none;
    font-weight: 700;
}

.product-hero {
    background: linear-gradient(135deg, #73bdf0 0%, #7bc3f2 100%);
}

.product-cover {
    height: 230px;
}

.product-card-info {
    min-height: 190px;
    display: flex;
    flex-direction: column;
}

.product-card-top {
    min-height: 62px;
}

.product-card-name {
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.product-card-price {
    color: #e60012;
    font-size: 22px;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 10px;
}

.product-card-intro {
    color: #667085;
    font-size: 14px;
    line-height: 1.75;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-card-more {
    margin-top: auto;
    padding-top: 16px;
    color: #00a896;
    font-size: 14px;
    font-weight: 800;
}

.product-detail-page {
    margin-top: 34px;
}

.product-detail {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 420px;
    gap: 26px;
    align-items: start;
}

.product-gallery,
.product-summary,
.product-detail-section {
    background: #fff;
    border: 1px solid #eef2f7;
    border-radius: 16px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, .06);
}

.product-gallery {
    padding: 18px;
}

.product-main-image {
    position: relative;
    aspect-ratio: 4 / 3;
    border-radius: 12px;
    overflow: hidden;
    background: #f6f8fb;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-main-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.product-detail-placeholder {
    color: #98a2b3;
}

.product-gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 58px;
    margin: 0;
    padding: 0;
    border: 0;
    border-radius: 10px;
    background: rgba(17, 24, 39, .55);
    color: #fff;
    font-size: 36px;
    line-height: 52px;
    cursor: pointer;
    z-index: 2;
}

.product-gallery-prev {
    left: 12px;
}

.product-gallery-next {
    right: 12px;
}

.product-thumbs {
    margin-top: 14px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(86px, 1fr));
    gap: 10px;
}

.product-thumbs button {
    width: 100%;
    aspect-ratio: 1 / 1;
    margin: 0;
    padding: 0;
    border: 2px solid transparent;
    border-radius: 10px;
    background: #f6f8fb;
    overflow: hidden;
    cursor: pointer;
}

.product-thumbs button.active {
    border-color: #00bfa5;
}

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

.product-summary {
    padding: 28px;
    position: sticky;
    top: 24px;
}

.product-badge {
    display: inline-flex;
    align-items: center;
    height: 28px;
    padding: 0 10px;
    border-radius: 999px;
    background: #ecfdf9;
    color: #00a896;
    font-size: 13px;
    font-weight: 800;
    margin-bottom: 14px;
}

.product-summary h1 {
    font-size: 26px;
    line-height: 1.35;
    color: #111827;
    margin-bottom: 18px;
}

.product-summary-price {
    color: #e60012;
    font-size: 34px;
    line-height: 1;
    font-weight: 900;
    margin-bottom: 18px;
}

.product-summary-intro {
    color: #475467;
    font-size: 15px;
    line-height: 1.9;
    padding: 18px 0;
    border-top: 1px solid #eef2f7;
    border-bottom: 1px solid #eef2f7;
    white-space: pre-wrap;
}

.product-service-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 20px 0;
}

.product-service-list span {
    padding: 8px 12px;
    border-radius: 8px;
    background: #f3f9f8;
    color: #00a896;
    font-size: 13px;
    font-weight: 800;
}

.product-contact-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px;
    background: #f8fafc;
    border-radius: 12px;
}

.product-contact-panel strong {
    display: block;
    color: #667085;
    font-size: 13px;
    margin-bottom: 6px;
}

.product-contact-panel p {
    color: #111827;
    font-size: 20px;
    font-weight: 900;
}

.product-contact-panel a {
    flex: 0 0 auto;
    min-width: 112px;
    height: 42px;
    line-height: 42px;
    border-radius: 8px;
    background: #00bfa5;
    color: #fff;
    text-align: center;
    text-decoration: none;
    font-weight: 800;
}

.product-detail-section {
    margin-top: 26px;
    padding: 30px;
}

.product-detail-section h2 {
    font-size: 22px;
    margin-bottom: 14px;
    color: #111827;
}

.product-detail-section p {
    color: #475467;
    font-size: 16px;
    line-height: 2;
    white-space: pre-wrap;
}

@media (max-width: 1240px) {
    .case-hero, .container {
        width: calc(100% - 32px);
    }

    .case-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .product-detail {
        grid-template-columns: 1fr;
    }

    .product-summary {
        position: static;
    }
}

@media (max-width: 700px) {
    .case-grid {
        grid-template-columns: 1fr;
    }

    .case-hero {
        padding: 32px 24px;
    }

    .case-hero h1 {
        font-size: 28px;
    }

    .product-summary,
    .product-gallery,
    .product-detail-section {
        padding: 16px;
    }

    .product-contact-panel {
        align-items: stretch;
        flex-direction: column;
    }
}

/* ===== Docx content optimization: product system / engineering strength ===== */
.section-head {
    text-align: center;
    margin-bottom: 34px;
}

.section-head span {
    display: inline-block;
    margin-bottom: 10px;
    color: #00a896;
    font-size: 12px;
    font-weight: 900;
    letter-spacing: .16em;
}

.section-head h2 {
    font-size: 30px;
    color: #111827;
    margin-bottom: 12px;
}

.section-head p {
    max-width: 760px;
    margin: 0 auto;
    color: #667085;
    line-height: 1.9;
}

.system-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.system-card {
    min-height: 150px;
    padding: 24px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid #eaf1f6;
    box-shadow: 0 10px 26px rgba(15, 23, 42, .055);
    transition: .25s;
}

.system-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 18px 36px rgba(15, 23, 42, .09);
    border-color: rgba(0, 191, 165, .28);
}

.system-card strong {
    display: block;
    margin-bottom: 10px;
    color: #111827;
    font-size: 18px;
}

.system-card p {
    color: #667085;
    line-height: 1.85;
    font-size: 14px;
}

.strength-section {
    padding: 54px 46px;
    border-radius: 24px;
    background: linear-gradient(135deg, #effafa 0%, #f8fbff 100%);
    border: 1px solid #e4f3f2;
}

.strength-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.strength-grid div {
    padding: 28px 16px;
    text-align: center;
    border-radius: 16px;
    background: rgba(255, 255, 255, .88);
    box-shadow: 0 8px 20px rgba(15, 23, 42, .045);
}

.strength-grid b {
    display: block;
    margin-bottom: 8px;
    color: #00a896;
    font-size: 26px;
    font-weight: 900;
}

.strength-grid span {
    color: #475467;
    font-size: 14px;
}

.product-solution-bar,
.case-scene-bar,
.case-filter-bar {
    width: 1200px;
    margin: 0 auto 28px;
    padding: 22px 24px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid #eaf1f6;
    box-shadow: 0 8px 24px rgba(15, 23, 42, .055);
}

.solution-title {
    margin-bottom: 14px;
    color: #111827;
    font-size: 17px;
    font-weight: 900;
}

.solution-tags,
.case-scene-bar,
.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.solution-tags span,
.case-scene-bar span,
.filter-tags a,
.product-card-tags span,
.case-tag-row span,
.case-detail-tags span {
    display: inline-flex;
    align-items: center;
    padding: 7px 11px;
    border-radius: 999px;
    background: #ecfdf9;
    color: #00a896;
    font-size: 13px;
    font-weight: 800;
}

.filter-row {
    display: grid;
    grid-template-columns: 86px 1fr;
    gap: 14px;
    align-items: flex-start;
    margin-bottom: 16px;
}

.filter-label {
    padding-top: 7px;
    color: #111827;
    font-size: 14px;
    font-weight: 900;
}

.filter-tags a {
    text-decoration: none;
    transition: .2s;
}

.filter-tags a:hover,
.filter-tags a.active {
    background: #00bfa5;
    color: #fff;
}

.case-search-form {
    display: flex;
    gap: 10px;
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid #eef2f7;
}

.case-search-form input[type="text"] {
    flex: 1;
    height: 42px;
    padding: 0 14px;
    border: 1px solid #d0d5dd;
    border-radius: 10px;
    outline: none;
    font-size: 14px;
}

.case-search-form input[type="text"]:focus {
    border-color: #00bfa5;
    box-shadow: 0 0 0 3px rgba(0, 191, 165, .12);
}

.case-search-form button,
.filter-reset {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 42px;
    padding: 0 18px;
    border: 0;
    border-radius: 10px;
    background: #00bfa5;
    color: #fff;
    font-weight: 900;
    cursor: pointer;
    text-decoration: none;
}

.filter-reset {
    background: #f2f4f7;
    color: #475467;
}

.filter-result {
    margin-top: 14px;
    color: #667085;
    font-size: 14px;
}

.filter-result span {
    margin-right: 10px;
}

.filter-result b {
    color: #00a896;
}

.product-card-tags,
.case-tag-row,
.case-detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 12px 0;
}

.detail-feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}

.detail-feature-grid div,
.case-project-panel div,
.case-project-info div,
.about-strength-cards div {
    padding: 20px;
    border-radius: 14px;
    background: #f8fafc;
    border: 1px solid #eef2f7;
}

.detail-feature-grid h3 {
    color: #111827;
    font-size: 17px;
    margin-bottom: 8px;
}

.process-steps {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 12px 0 18px;
}

.process-steps span {
    position: relative;
    padding: 10px 16px;
    border-radius: 10px;
    background: linear-gradient(135deg, #73bdf0, #00bfa5);
    color: #fff;
    font-weight: 800;
    font-size: 14px;
}

.case-project-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin: 18px 0 24px;
}

.case-project-info strong {
    display: block;
    margin-bottom: 8px;
    color: #111827;
    font-size: 14px;
}

.case-project-info span {
    color: #475467;
    line-height: 1.7;
    font-weight: 700;
}

.case-card-meta {
    margin: -2px 0 9px;
    color: #667085;
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.case-project-panel {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin: 18px 0 24px;
}

.case-project-panel strong,
.about-strength-cards strong {
    display: block;
    margin-bottom: 8px;
    color: #111827;
    font-size: 17px;
}

.case-project-panel p,
.about-strength-cards p {
    color: #667085;
    line-height: 1.8;
    margin: 0;
}

.about-strength-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    margin-top: 24px;
}

.contact-card-enhanced {
    position: relative;
    overflow: hidden;
}

.contact-subtitle {
    max-width: 760px;
    margin: -24px 0 34px;
    color: #667085;
    line-height: 1.9;
}

.contact-actions {
    display: flex;
    gap: 14px;
    margin: 28px 0 20px;
}

.contact-actions a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 140px;
    height: 44px;
    padding: 0 18px;
    border-radius: 10px;
    background: #00bfa5;
    color: #fff;
    text-decoration: none;
    font-weight: 900;
}

.contact-actions a + a {
    background: #eef8f7;
    color: #00a896;
}

.contact-tips {
    padding: 18px 20px;
    border-radius: 12px;
    background: #f8fafc;
    border-left: 4px solid #00bfa5;
    color: #475467;
    line-height: 1.8;
}

/* ===== Home selected cases ===== */
.section-head-with-action {
    position: relative;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 24px;
    text-align: center;
}

.section-head-with-action > div {
    width: 100%;
}

.section-head-with-action p {
    margin: 0 auto;
}

.section-more {
    position: absolute;
    right: 0;
    bottom: 2px;
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 42px;
    padding: 0 18px;
    border-radius: 999px;
    background: #ecfdf9;
    color: #00a896;
    text-decoration: none;
    font-weight: 900;
    transition: .25s;
}

.section-more:hover {
    background: #00bfa5;
    color: #fff;
    transform: translateY(-2px);
}

.home-case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.home-case-card {
    display: block;
    overflow: hidden;
    border-radius: 18px;
    background: #fff;
    border: 1px solid #eef2f7;
    box-shadow: 0 10px 26px rgba(15, 23, 42, .065);
    color: inherit;
    text-decoration: none;
    transition: .25s;
}

.home-case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 16px 36px rgba(15, 23, 42, .12);
}

.home-case-cover {
    height: 220px;
    background: #f3f4f6;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #98a2b3;
    overflow: hidden;
}

.home-case-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: .35s;
}

.home-case-card:hover .home-case-cover img {
    transform: scale(1.04);
}

.home-case-info {
    padding: 18px 18px 20px;
}

.home-case-name {
    margin-bottom: 10px;
    color: #111827;
    font-size: 17px;
    font-weight: 900;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.home-case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 10px;
}

.home-case-tags span {
    display: inline-flex;
    padding: 6px 10px;
    border-radius: 999px;
    background: #ecfdf9;
    color: #00a896;
    font-size: 12px;
    font-weight: 900;
}

.home-case-address {
    color: #667085;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.home-case-address::before {
    content: "📍";
    margin-right: 4px;
}

@media (max-width: 1240px) {
    .product-solution-bar,
    .case-scene-bar,
    .case-filter-bar {
        width: calc(100% - 32px);
    }

    .system-grid,
    .detail-feature-grid,
    .home-case-grid,
    .case-project-info {
        grid-template-columns: repeat(2, 1fr);
    }

    .strength-grid,
    .about-strength-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 700px) {
    .system-grid,
    .strength-grid,
    .detail-feature-grid,
    .case-project-panel,
    .case-project-info,
    .about-strength-cards,
    .home-case-grid {
        grid-template-columns: 1fr;
    }

    .strength-section {
        padding: 34px 20px;
    }

    .contact-actions,
    .section-head-with-action,
    .case-search-form {
        flex-direction: column;
        align-items: flex-start;
    }

    .case-search-form input[type="text"],
    .case-search-form button,
    .filter-reset {
        width: 100%;
    }

    .filter-row {
        grid-template-columns: 1fr;
        gap: 8px;
    }
}

/* ===== Modern UI polish ===== */
.nav {
    position: sticky;
    top: 14px;
    z-index: 50;
    backdrop-filter: blur(16px);
    background: rgba(255, 255, 255, .88);
    border: 1px solid rgba(230, 237, 245, .9);
    border-radius: 18px;
    box-shadow: 0 12px 36px rgba(15, 23, 42, .08);
}

.nav-menu a {
    position: relative;
    padding: 9px 2px;
    color: #344054;
    font-weight: 700;
    transition: color .22s ease;
}

.nav-menu a.active {
    color: var(--brand);
    border-bottom: 0;
}

.nav-menu a::after {
    content: "";
    position: absolute;
    left: 50%;
    right: 50%;
    bottom: 2px;
    height: 3px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--brand), var(--blue));
    transition: left .22s ease, right .22s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    left: 0;
    right: 0;
}

.banner,
.case-hero,
.product-hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #149ed8 0%, #35c5b1 100%) !important;
    box-shadow: 0 22px 55px rgba(20, 158, 216, .22) !important;
}

.banner::before,
.case-hero::before,
.product-hero::before {
    content: "";
    position: absolute;
    inset: -35% -10% auto auto;
    width: 520px;
    height: 520px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .18);
}

.banner-inner,
.case-hero h1,
.case-hero p,
.product-hero h1,
.product-hero p {
    position: relative;
    z-index: 1;
}

.case-hero h1,
.product-hero h1,
.banner h1 {
    letter-spacing: -.03em;
    font-weight: 950;
}

.case-card,
.product-card,
.home-case-card,
.system-card,
.feature,
.card,
.case-detail,
.product-gallery,
.product-summary,
.product-detail-section,
.contact-card,
.form-box,
.case-filter-bar,
.product-filter-bar,
.product-solution-bar {
    border-color: rgba(230, 237, 245, .95) !important;
    box-shadow: var(--shadow-sm) !important;
}

.case-card:hover,
.product-card:hover,
.home-case-card:hover,
.system-card:hover,
.feature:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md) !important;
}

.case-filter-bar,
.product-filter-bar,
.product-solution-bar {
    width: 1200px;
    margin: 0 auto 28px;
    padding: 24px;
    border-radius: 22px;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(12px);
}

.filter-tags a,
.solution-tags span,
.case-tag-row span,
.case-detail-tags span,
.product-card-tags span,
.home-case-tags span {
    border: 1px solid rgba(0, 191, 165, .12);
    transition: transform .18s ease, background .18s ease, color .18s ease, box-shadow .18s ease;
}

.filter-tags a:hover,
.filter-tags a.active {
    transform: translateY(-1px);
    box-shadow: 0 8px 18px rgba(0, 191, 165, .18);
}

.case-search-form input[type="text"] {
    height: 46px;
    border-radius: 14px;
    background: #fbfdff;
}

.case-search-form button,
.filter-reset {
    height: 46px;
    border-radius: 14px;
    box-shadow: 0 10px 20px rgba(0, 191, 165, .16);
}

.filter-reset {
    box-shadow: none;
}

.pager {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin: 34px 0 0;
}

.pager a {
    min-width: 42px;
    height: 42px;
    padding: 0 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: #fff;
    border: 1px solid var(--line);
    color: #475467;
    text-decoration: none;
    font-weight: 900;
    box-shadow: 0 6px 16px rgba(15, 23, 42, .045);
    transition: .2s;
}

.pager a:hover,
.pager a.active {
    background: var(--brand);
    color: #fff;
    border-color: var(--brand);
    transform: translateY(-2px);
}

.pager a.disabled {
    pointer-events: none;
    opacity: .46;
    box-shadow: none;
}

.footer {
    background: #0f172a;
    color: rgba(255, 255, 255, .72);
    padding: 28px 0;
}

@media (max-width: 1240px) {
    .product-filter-bar {
        width: calc(100% - 32px);
    }
}

@media (max-width: 700px) {
    .nav {
        position: static;
        border-radius: 16px;
    }

    .banner {
        height: auto;
        min-height: 420px;
        padding: 58px 0;
    }

    .banner-inner {
        width: calc(100% - 32px);
        padding-left: 0;
    }

    .banner h1 {
        font-size: 32px;
    }

    .banner .tags {
        flex-wrap: wrap;
    }

    .product-filter-bar {
        width: calc(100% - 32px);
    }
}

/* ===== About strength cards polish 2026052806 ===== */
.about-strength-cards {
    gap: 22px;
    margin-top: 32px;
}

.about-strength-cards div {
    position: relative;
    min-height: 150px;
    padding: 28px 26px 26px;
    overflow: hidden;
    border: 1px solid rgba(230, 237, 245, .95);
    border-radius: 22px;
    background: linear-gradient(145deg, rgba(255, 255, 255, .96) 0%, rgba(248, 252, 255, .94) 58%, rgba(236, 253, 249, .78) 100%);
    box-shadow: 0 14px 36px rgba(15, 23, 42, .065);
    transition: transform .24s ease, box-shadow .24s ease, border-color .24s ease;
}

.about-strength-cards div::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--brand), var(--blue));
    opacity: .86;
}

.about-strength-cards div::after {
    content: "";
    position: absolute;
    right: -34px;
    bottom: -42px;
    width: 118px;
    height: 118px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 191, 165, .14), rgba(74, 168, 240, .06) 58%, transparent 70%);
    pointer-events: none;
}

.about-strength-cards div:hover {
    transform: translateY(-7px);
    border-color: rgba(0, 191, 165, .24);
    box-shadow: 0 24px 52px rgba(15, 23, 42, .11);
}

.about-strength-cards strong {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    color: #111827;
    font-size: 20px;
    line-height: 1.35;
    font-weight: 950;
    letter-spacing: -.02em;
}

.about-strength-cards strong::before {
    content: "";
    width: 36px;
    height: 36px;
    flex: 0 0 36px;
    border-radius: 13px;
    background: linear-gradient(135deg, rgba(0, 191, 165, .16), rgba(74, 168, 240, .14));
    box-shadow: inset 0 0 0 1px rgba(0, 191, 165, .12);
}

.about-strength-cards div:nth-child(1) strong::before {
    content: "研";
}

.about-strength-cards div:nth-child(2) strong::before {
    content: "设";
}

.about-strength-cards div:nth-child(3) strong::before {
    content: "景";
}

.about-strength-cards div:nth-child(4) strong::before {
    content: "服";
}

.about-strength-cards div:nth-child(n) strong::before {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--brand-dark);
    font-size: 16px;
    font-weight: 950;
}

.about-strength-cards p {
    position: relative;
    color: #667085;
    font-size: 16px;
    line-height: 1.9;
    margin: 0;
}

@media (max-width: 700px) {
    .about-strength-cards {
        gap: 14px;
        margin-top: 20px;
    }

    .about-strength-cards div {
        min-height: auto;
        padding: 24px 22px;
    }
}

.case-filter-bar + .container,
.product-filter-bar + .container {
    margin-top: 28px;
}

.case-search-form {
    display: grid;
    grid-template-columns: minmax(240px, 340px) minmax(220px, 1fr) auto;
    align-items: stretch;
    gap: 14px;
    margin-top: 22px;
    padding-top: 22px;
}

.case-search-form input[type="text"],
.case-search-form button,
.case-search-form .filter-reset {
    width: auto;
    min-width: 0;
    height: 46px;
    margin: 0;
    line-height: 1;
}

.case-search-form button {
    width: auto;
    min-width: 180px;
    padding: 0 34px;
    white-space: nowrap;
}

.case-search-form .filter-reset {
    min-width: 116px;
    padding: 0 24px;
    white-space: nowrap;
    word-break: keep-all;
}

.product-filter-bar .case-search-form:not(:has(.filter-reset)) {
    grid-template-columns: minmax(240px, 340px) minmax(220px, 1fr);
}

@supports not selector(:has(*)) {
    .product-filter-bar .case-search-form {
        grid-template-columns: minmax(240px, 340px) minmax(220px, 1fr) auto;
    }
}

@media (max-width: 700px) {
    .case-filter-bar + .container,
    .product-filter-bar + .container {
        margin-top: 22px;
    }

    .case-search-form,
    .product-filter-bar .case-search-form,
    .product-filter-bar .case-search-form:not(:has(.filter-reset)) {
        display: grid;
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .case-search-form input[type="text"],
    .case-search-form button,
    .case-search-form .filter-reset {
        width: 100%;
    }
}