/* 全局样式 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* 首页移动端专用布局（由 script.js 自动添加 body.is-mobile） */
body.is-mobile .header {
    max-width: none;
    height: 56px;
}

body.is-mobile .header-container {
    padding: 0 14px;
}

body.is-mobile .logo {
    width: auto;
}

body.is-mobile .logo-img {
    width: 28px;
    height: 40px;
}

body.is-mobile .company-name {
    font-size: 14px;
    line-height: 20px;
}

body.is-mobile .company-english {
    font-size: 10px;
    line-height: 14px;
}

body.is-mobile .nav-list {
    display: none !important;
}

body.is-mobile .hero {
    min-height: auto;
    padding-top: 56px;
}

body.is-mobile .hero-main {
    min-height: 320px;
    padding: 0;
    background-image: url(assets/image/phone/mn87l602-3dnc795_tel.svg);
    background-position: center top;
    background-size: cover;
}

/* 解决方案等页：stylesheet 内背景图由 body.is-mobile 换 phone/_tel（与 swapLocalImagesToTel 一致） */
body.is-mobile .solutions-banner {
    background-image: url(assets/image/phone/plan1_tel.svg);
}

body.is-mobile .solutions-banner-home {
    background-image: url(assets/image/phone/mni7s88u-hbvj4sm_tel.svg);
    min-height: 320px;
    padding: 24px 14px 20px;
    margin-top: 56px;
    align-items: flex-start;
    text-align: left;
    background-position: center top;
    background-size: cover;
}

body.is-mobile .solutions-banner-home .banner-content {
    max-width: 100%;
    width: 100%;
}

body.is-mobile .solutions-banner-home .banner-content {
    display: none;
}

body.is-mobile .solutions-banner-home .banner-title {
    font-size: 24px;
    line-height: 34px;
    margin-bottom: 12px;
    text-align: left;
}

body.is-mobile .solutions-banner-home .banner-text {
    font-size: 14px;
    line-height: 22px;
    margin-bottom: 8px;
    text-align: left;
}

/* 手机版 solutions-home.html 不显示「课程体系/方案价值」跳转栏 */
body.is-mobile .solutions-banner-home + .solutions-tabs {
    display: none;
}

body.is-mobile .solutions-home-page {
    padding: 0 !important;
}

body.is-mobile .solutions-home-page .scenarios-section[style] {
    padding: 14px 14px 0 !important;
}

/* 课程体系区块紧贴顶部图 */
body.is-mobile .solutions-home-page #courses.scenarios-section[style] {
    padding-top: 0 !important;
    margin-top: -80px;
}

body.is-mobile .solutions-home-page #values-home.scenarios-section[style] {
    padding-top: 14px !important;
    padding-bottom: 0 !important;
}

body.is-mobile .solutions-home-page .about-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin-bottom: 10px;
}

body.is-mobile .solutions-home-page .about-header .section-title {
    text-align: center;
    margin-left: 0;
    margin-right: 0;
}

body.is-mobile .solutions-home-page .about-header .section-divider {
    margin-left: 0;
    margin-top: 16px;
}

body.is-mobile .solutions-home-page .solution-item.solution-image-only {
    margin: 14px 0;
}

body.is-mobile .solutions-home-page .solution-image-only img {
    display: block;
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    border-radius: 8px;
}

body.is-mobile .athletics-solutions {
    background-image: url(assets/image/phone/plan3_tel.webp);
    min-height: 320px;
    padding: 0;
    margin-top: 56px;
    background-position: center top;
    background-size: cover;
}

/* 手机版 athletics-solutions.html：隐藏tab并恢复正常内容流 */
body.is-mobile .athletics-solutions + .solutions-tabs {
    display: none;
}

body.is-mobile .athletics-solutions-page {
    padding: 0 !important;
}

body.is-mobile .athletics-solutions-page .scenarios-section[style] {
    padding: 20px 14px 0 !important;
}

body.is-mobile .athletics-solutions-page #functions.scenarios-section[style] {
    padding-top: 14px !important;
}

body.is-mobile .athletics-solutions-page #values.scenarios-section[style] {
    padding-top: 14px !important;
}

body.is-mobile .athletics-solutions-page .about-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin-bottom: 10px;
}

body.is-mobile .athletics-solutions-page .about-header .section-title {
    text-align: center;
    margin-left: 0;
    margin-right: 0;
}

body.is-mobile .athletics-solutions-page .about-header .section-divider {
    margin-left: 0;
    margin-top: 16px;
}

body.is-mobile .athletics-solutions-page .solution-item.solution-image-only,
body.is-mobile .athletics-solutions-page .big-data-center {
    margin: 14px 0;
}

body.is-mobile .athletics-solutions-page .big-data-center {
    padding: 0;
}

body.is-mobile .athletics-solutions-page .solution-image-only img,
body.is-mobile .athletics-solutions-page .big-data-center img {
    display: block;
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    border-radius: 8px;
}

/* 健康校园解决方案页（手机）：按图二样式收紧布局，消除大面积空白 */
body.is-mobile .solutions-banner-campus {
    min-height: 320px;
    padding: 0;
    margin-top: 56px;
    background-position: center top;
    background-size: cover;
}

body.is-mobile .solutions-campus-page {
    padding: 0 !important;
}

body.is-mobile .solutions-campus-page .scenarios-section[style] {
    padding: 20px 14px 0 !important;
}

body.is-mobile .solutions-campus-page #functions.scenarios-section[style] {
    padding-top: 14px !important;
}

body.is-mobile .solutions-campus-page #values.scenarios-section {
    padding: 14px 14px 0 !important;
}

body.is-mobile .solutions-campus-page #values .about-header[style] {
    padding: 0 !important;
}

body.is-mobile .solutions-campus-page .about-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin-bottom: 10px;
}

body.is-mobile .solutions-campus-page .about-header .section-title {
    text-align: center;
    margin-left: 0;
    margin-right: 0;
}

body.is-mobile .solutions-campus-page .about-header .section-divider {
    margin-left: 0;
    margin-top: 16px;
}

body.is-mobile .solutions-campus-page .solution-item.solution-image-only {
    margin: 14px 0;
}

body.is-mobile .solutions-campus-page .video-container,
body.is-mobile .solutions-campus-page .image-grid,
body.is-mobile .solutions-campus-page .big-data-center {
    margin: 14px 0;
}

body.is-mobile .solutions-campus-page .big-data-center {
    padding: 0;
}

body.is-mobile .solutions-campus-page .image-grid {
    gap: 10px;
}

body.is-mobile .solutions-campus-page .big-data-center1 {
    margin: 10px 0 0;
    width: 100%;
    text-align: center;
}

body.is-mobile .solutions-campus-page .big-data-center1 img,
body.is-mobile .solutions-campus-page .big-data-center img,
body.is-mobile .solutions-campus-page .solution-image-only img {
    display: block;
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    border-radius: 8px;
}

body.is-mobile .solutions-campus-page .full-width-images {
    width: 100%;
    max-width: 100%;
    margin: 0;
}

body.is-mobile .solutions-campus-page .image-grid {
    justify-content: center;
    align-items: center;
}

body.is-mobile .solutions-campus-page .image-grid img {
    width: 100%;
    margin: 0 auto;
}

/* 手机版 solutions.html 不显示「应用场景/系统功能/方案价值」跳转栏 */
body.is-mobile .solutions-banner-campus + .solutions-tabs {
    display: none;
}

body.is-mobile .footer {
    background-image: url(assets/image/phone/mn87km4w-wlnj28h_tel.png);
}

/* 手机版首图不显示“人人掌握...”文字 */
body.is-mobile .hero-title,
body.is-mobile .hero-subtitle,
body.is-mobile .hero-tagline {
    display: none;
}

body.is-mobile #products {
    margin-top: 20px !important;
    z-index: auto !important;
}

body.is-mobile #products > div[style] {
    height: auto !important;
    width: 100% !important;
}

body.is-mobile .product-title {
    margin-top: 0;
}

body.is-mobile .index-business {
    position: static;
    top: auto;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
    height: auto;
}

body.is-mobile .product-card,
body.is-mobile .edu-system,
body.is-mobile .ai-platform,
body.is-mobile .sports-platform {
    position: relative;
    top: auto;
    left: auto;
    width: 100%;
    max-width: 100%;
    height: auto;
    margin: 0;
    z-index: auto;
    padding: 0;
    box-sizing: border-box;
}

body.is-mobile .card-title {
    font-size: 22px;
    line-height: 32px;
}

body.is-mobile .card-description {
    font-size: 14px;
    line-height: 24px;
}

body.is-mobile .card-button {
    margin-top: 26px;
}

body.is-mobile .card-button .btn {
    width: 100%;
    text-align: center;
    padding: 10px 16px;
    font-size: 16px;
    line-height: 22px;
}

body.is-mobile .about,
body.is-mobile .news,
body.is-mobile .footer-content,
body.is-mobile .footer-bottom {
    padding-left: 14px;
    padding-right: 14px;
}

/* 关于我们：左右贴屏，方便统计图满宽 */
body.is-mobile section#about.about {
    padding-left: 0;
    padding-right: 0;
}

/* 手机版首页区块间距：关于我们/公司资质/新闻动态与上一项保持紧凑 */
body.is-mobile .about,
body.is-mobile .certificates,
body.is-mobile .news {
    margin-top: 20px !important;
}

body.is-mobile .about-content {
    padding: 18px 0;
}

body.is-mobile .about-text {
    padding-left: 20px;
    padding-right: 20px;
}

body.is-mobile .about-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
    margin-top: 14px;
    width: 100%;
    /* 与上方 about-text 左右边距一致 */
    padding-left: 20px;
    padding-right: 20px;
}

/* 手机版关于我们统计卡：用 icon_01/02/03_tel 图片替换纯文字（保留 SVG 原有阴影留白） */
body.is-mobile .about-stats .stat-item {
    width: 100%;
    min-width: 0;
    margin: 0;
    min-height: 0;
    height: auto;
    aspect-ratio: 662 / 266;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
    background-repeat: no-repeat;
    background-position: center;
    background-size: 100% 100%;
}

body.is-mobile .about-stats .stat-item:nth-child(1) {
    background-image: url(assets/image/phone/icon_01_tel.svg);
}

body.is-mobile .about-stats .stat-item:nth-child(2) {
    background-image: url(assets/image/phone/icon_02_tel.svg);
}

body.is-mobile .about-stats .stat-item:nth-child(3) {
    background-image: url(assets/image/phone/icon_03_tel.svg);
}

body.is-mobile .about-stats .stat-item .stat-number,
body.is-mobile .about-stats .stat-item .stat-label,
body.is-mobile .about-stats .stat-item .stat-description {
    display: none;
}

body.is-mobile .news-grid {
    flex-direction: column;
    gap: 22px;
}

body.is-mobile .news {
    background: #ffffff !important;
}

/* 新闻动态（手机）：图一 — 大图在上，标题、日期自上而下左对齐 */
body.is-mobile .news-item {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    min-height: 0;
    padding: 16px 14px 18px;
}

body.is-mobile .news-image {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    min-height: 160px;
    max-height: 220px;
    object-fit: cover;
    border-radius: 6px;
    margin: 0;
}

body.is-mobile .news-item .news-title {
    margin: 14px 0 0;
    width: 100%;
    height: auto;
    text-align: left;
    align-self: flex-start;
    font-size: 16px;
    line-height: 24px;
    font-weight: 600;
}

body.is-mobile .news-item .news-date {
    margin: 10px 0 0;
    width: 100%;
    text-align: left;
    align-self: flex-start;
    font-size: 14px;
    line-height: 20px;
    color: var(--text-secondary);
}

/* 手机端防横向溢出 */
html,
body.is-mobile {
    overflow-x: hidden;
}

body.is-mobile .header,
body.is-mobile .hero,
body.is-mobile .about,
body.is-mobile .certificates,
body.is-mobile .news,
body.is-mobile .footer {
    max-width: 100vw;
    overflow-x: clip;
}

/* 首页手机端页脚（仅 .home-footer，不影响其它页） */
body.is-mobile .home-footer .footer-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    gap: 12px;
}

body.is-mobile .home-footer .footer-logo {
    order: 1;
    width: 100%;
    min-width: 0;
    max-width: 100%;
    justify-content: flex-start;
    align-items: center;
    padding-top: 12px;
    height: auto;
}

body.is-mobile .home-footer .footer-logo-img {
    width: 40px;
    height: auto;
    flex-shrink: 0;
    margin-right: 10px;
}

body.is-mobile .home-footer .footer-logo-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    min-width: 0;
}

body.is-mobile .home-footer .footer-company-name {
    font-size: 15px;
    line-height: 22px;
    font-weight: 500;
}

body.is-mobile .home-footer .footer-company-english {
    font-size: 11px;
    line-height: 16px;
    margin-top: 2px;
}

body.is-mobile .home-footer .footer-divider {
    display: none;
}

body.is-mobile .home-footer .footer-social {
    order: 3;
    display: flex;
    flex-direction: row;
    /* 不换行：窄屏下「46% + margin-right」曾超过 100% 导致两码上下叠 */
    flex-wrap: nowrap;
    justify-content: center;
    align-items: flex-start;
    width: 100%;
    max-width: 100%;
    gap: 16px 20px;
    box-sizing: border-box;
}

body.is-mobile .home-footer .footer-social .social-item {
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-width: 0;
    max-width: none;
    margin-top: 30px;
    margin-right: 0;
}

body.is-mobile .home-footer .social-image {
    width: 120px;
    max-width: 100%;
    height: auto;
    aspect-ratio: 1;
    object-fit: contain;
    margin: 0 auto;
}

body.is-mobile .home-footer .social-text {
    margin-top: 10px;
    text-align: center;
    width: 100%;
}

body.is-mobile .home-footer .footer-contact {
    order: 2;
    align-items: stretch;
    margin-top: 0;
    width: 100%;
    max-width: 100%;
}

body.is-mobile .home-footer .contact-item {
    margin-bottom: 0;
    text-align: left;
    font-size: 13px;
    line-height: 20px;
}

body.is-mobile .home-footer .footer-contact-index {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px 12px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

body.is-mobile .home-footer .footer-contact-index .contact-item {
    min-width: 0;
    word-break: break-word;
}

/* 手机版联系方式配对：
   第一行：粤ICP备13052207号-2 | TEL: 0755-83323488
   第二行：深圳市尔思电子有限公司 | 电话: 13823536986 */
body.is-mobile .home-footer .footer-contact-index .contact-item:nth-child(1) {
    order: 1;
}

body.is-mobile .home-footer .footer-contact-index .contact-item:nth-child(3) {
    order: 2;
}

body.is-mobile .home-footer .footer-contact-index .contact-item:nth-child(2) {
    order: 3;
}

body.is-mobile .home-footer .footer-contact-index .contact-item:nth-child(4) {
    order: 4;
}

body.is-mobile .home-footer .footer-bottom {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    text-align: center;
    padding-top: 12px;
    padding-bottom: 14px;
}

body.is-mobile .home-footer .footer-legal {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 100%;
    gap: 6px 10px;
    row-gap: 0;
}

body.is-mobile .home-footer .footer-beian-row {
    display: inline-flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 6px;
    flex-wrap: nowrap;
    flex-shrink: 0;
}

body.is-mobile .home-footer .footer-legal .legal-image {
    display: block;
    margin: 0;
    flex-shrink: 0;
    align-self: center;
}

body.is-mobile .home-footer .legal-beian-link {
    margin: 0;
    padding: 0;
    text-align: left;
    line-height: 20px;
    font-size: 13px;
}

body.is-mobile .home-footer .footer-visitor-count {
    display: inline;
    margin: 0;
    padding: 0;
    text-align: left;
    white-space: nowrap;
    font-size: 13px;
    line-height: 20px;
    align-self: center;
}

body.is-mobile .home-footer .footer-certs {
    display: none;
}

/* 手机：区块标题居中（产品介绍 / 关于我们 / 新闻动态） */
body.is-mobile #products .about-header,
body.is-mobile section#about > .about-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
}

body.is-mobile #products .about-header .section-title,
body.is-mobile section#about > .about-header .section-title {
    margin-left: 0;
    margin-right: 0;
    text-align: center;
}

body.is-mobile #products .about-header .section-divider,
body.is-mobile section#about > .about-header .section-divider {
    margin-left: 0;
    margin-top: 16px;
}

body.is-mobile .news-header {
    justify-content: center;
    width: 100%;
    margin-bottom: 28px;
}

body.is-mobile .news-header .section-header {
    width: 100%;
    align-items: center;
}

body.is-mobile .news-header .section-title {
    margin-left: 0;
    margin-right: 0;
    text-align: center;
}

/* 手机：产品介绍 — 整卡背景图（_tel）+ 左侧渐变压字 + 阴影 */
body.is-mobile .index-business .product-card {
    display: block;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
    height: auto;
    min-height: 200px;
    padding: 18px 16px 22px;
    padding-right: 24%;
    text-align: left;
    background-color: #ffffff;
    background-repeat: no-repeat, no-repeat;
    background-size: cover, auto 92%;
    background-position: 0 0, 100% 50%;
    border: none;
    border-radius: 8px;
    box-shadow: 0px 1px 8px 0px rgba(220, 228, 230, 0.55);
}

body.is-mobile .index-business .product-card.edu-system {
    background-image:
        linear-gradient(90deg, #ffffff 0%, #ffffff 52%, rgba(255, 255, 255, 0.92) 66%, rgba(255, 255, 255, 0.45) 76%, rgba(255, 255, 255, 0) 86%),
        url(assets/image/phone/mn86j8e7-i1tjmvb_tel.svg);
}

body.is-mobile .index-business .product-card.ai-platform {
    background-image:
        linear-gradient(90deg, #ffffff 0%, #ffffff 52%, rgba(255, 255, 255, 0.92) 66%, rgba(255, 255, 255, 0.45) 76%, rgba(255, 255, 255, 0) 86%),
        url(assets/image/phone/mn89zxzk-q1gjyfr_tel.svg);
}

body.is-mobile .index-business .product-card.sports-platform {
    background-image:
        linear-gradient(90deg, #ffffff 0%, #ffffff 52%, rgba(255, 255, 255, 0.92) 66%, rgba(255, 255, 255, 0.45) 76%, rgba(255, 255, 255, 0) 86%),
        url(assets/image/phone/sports_tel.svg);
}

body.is-mobile .index-business .product-card .card-content {
    position: relative;
    z-index: 1;
    max-width: 75%;
    width: 100%;
    text-align: left;
}

body.is-mobile .index-business .product-card .card-description {
    margin-bottom: 0;
}

body.is-mobile .index-business .card-button {
    margin-top: 14px;
    position: relative;
    z-index: 2;
}

body.is-mobile .index-business .card-button .btn {
    width: auto;
    align-self: flex-start;
    padding: 8px 18px;
    font-size: 14px;
    line-height: 20px;
}

body.is-mobile .index-business .card-button .btn::after {
    content: ' >';
    font-weight: 500;
}

body.is-mobile .index-business .product-card .icon,
body.is-mobile .index-business .product-card .icon1 {
    display: none !important;
}

/* 手机：公司资质两列，倒数第二与最后一项各占一行 */
body.is-mobile .certificates {
    padding-left: 14px;
    padding-right: 14px;
}

body.is-mobile .certificates-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

body.is-mobile .certificate-item {
    min-width: 0;
    max-width: 100%;
    padding: 10px 8px;
    box-sizing: border-box;
}

body.is-mobile .certificate-item .certificate-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    min-height: 0;
    object-fit: contain;
}

body.is-mobile .certificate-item-full {
    grid-column: 1 / -1;
    width: 100%;
    max-width: 100%;
}

body.is-mobile .certificate-dual-images {
    flex-direction: column;
    align-items: center;
    gap: 16px;
    width: 100%;
    max-width: 100%;
}

body.is-mobile .certificate-item-full .certificate-image {
    width: 100%;
    max-width: 100%;
    height: auto;
}

body.is-mobile .certificate-title {
    width: 100%;
    max-width: 100%;
    word-break: break-word;
}

/* 手机端头部：右侧菜单图标 */
.mobile-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 6px;
    border: none;
    background: transparent;
    cursor: pointer;
    flex-shrink: 0;
}

.mobile-menu-toggle-img {
    display: block;
    width: 26px;
    height: auto;
    max-height: 32px;
    object-fit: contain;
}

body.is-mobile .mobile-menu-toggle {
    display: inline-flex;
}

/* 手机端全屏导航抽屉 */
.mobile-nav-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.mobile-nav-overlay.is-open {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
}

.mobile-nav-panel {
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 100%;
    height: 100%;
    max-height: 100%;
    background: transparent;
    display: flex;
    flex-direction: column;
    box-shadow: none;
    overflow-y: auto;
    pointer-events: none;
}

.mobile-nav-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 18px 14px;
    border-bottom: 1px solid #e8e8e8;
    flex-shrink: 0;
    pointer-events: auto;
}

.mobile-nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.mobile-nav-logo {
    flex-shrink: 0;
    width: 28px;
    height: auto;
    object-fit: contain;
}

.mobile-nav-brand-text {
    min-width: 0;
}

.mobile-nav-company {
    font-size: 14px;
    font-weight: 600;
    line-height: 20px;
    color: #1a1919;
}

.mobile-nav-company-en {
    margin-top: 2px;
    font-size: 10px;
    line-height: 14px;
    color: #6d7278;
    letter-spacing: 0.02em;
}

.mobile-nav-close {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    margin: -8px -10px -8px 8px;
    border: none;
    background: transparent;
    font-size: 28px;
    line-height: 1;
    color: #1a1919;
    cursor: pointer;
}

.mobile-nav-menu {
    flex: 0 0 auto;
    overflow: visible;
    padding: 0;
    background: #ffffff;
    pointer-events: auto;
}

.mobile-nav-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    min-height: 62px;
    padding: 20px 18px;
    font-size: 16px;
    font-weight: 500;
    line-height: 22px;
    color: #1a1919;
    text-decoration: none;
    border: none;
    border-bottom: 1px solid #ebebeb;
    background: #fff;
    text-align: left;
    font-family: inherit;
    cursor: pointer;
    box-sizing: border-box;
}

a.mobile-nav-row {
    font-weight: 500;
}

a.mobile-nav-row:link,
a.mobile-nav-row:visited,
a.mobile-nav-row:hover,
a.mobile-nav-row:active,
a.mobile-nav-row:focus {
    color: #1a1919;
    text-decoration: none;
}

.mobile-nav-accordion {
    border-bottom: 1px solid #ebebeb;
}

.mobile-nav-accordion .mobile-nav-row {
    border-bottom: none;
}

.mobile-nav-accordion-panel {
    padding: 0;
    background: #fafafa;
}

.mobile-nav-accordion-panel.is-collapsed {
    display: none;
}

.mobile-nav-subrow {
    display: block;
    min-height: 62px;
    padding: 20px 18px;
    font-size: 16px;
    line-height: 22px;
    color: #4a4a4a;
    text-decoration: none;
    border-top: 1px solid #ededed;
}

.mobile-nav-subrow:first-child {
    border-top: none;
}

.mobile-nav-chevron {
    display: inline-block;
    width: 8px;
    height: 8px;
    margin-left: 8px;
    border-right: 2px solid #1a1919;
    border-bottom: 2px solid #1a1919;
    transform: rotate(45deg);
    margin-bottom: 4px;
    transition: transform 0.2s ease;
}

.mobile-nav-accordion-btn.is-collapsed .mobile-nav-chevron {
    transform: rotate(-45deg);
    margin-bottom: 0;
}

.mobile-nav-panel-footer {
    flex-shrink: 0;
    padding: 0;
    font-size: 15px;
    line-height: 24px;
    color: #1a1919;
    border-top: 1px solid #ebebeb;
    background: #fff;
    pointer-events: auto;
}

.mobile-nav-panel-header {
    background: #ffffff;
}

.mobile-nav-panel-footer .mobile-nav-row {
    border-bottom: none;
    padding-bottom: calc(20px + env(safe-area-inset-bottom, 0px));
}

.mobile-nav-phone {
    color: #e02020;
    font-weight: 600;
    text-decoration: none;
}

@media (min-width: 769px) {
    .mobile-nav-overlay {
        display: none;
    }
}

/* 首页电脑端专用布局 */
body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    color: #000000;
    background-color: #ffffff;
    line-height: 1.5;
}

/* 颜色变量 */
:root {
    --primary-color: #0057ff;
    --secondary-color: #082676;
    --text-color: #0b0b0b;
    --text-secondary: #6d7278;
    --text-light: #b8c4cd;
    --background-light: #f6f8ff;
    --background-dark: #131b2a;
}

/* 通用样式 */
.section-title {
    font-size: 36px;
    font-weight: 600;
    line-height: 50px;
    margin-left: 28px;
    margin-right: 28px;
    color: var(--text-color);
}

.section-divider {
    margin-top: 16px;
    width: 200px;
    height: 11px;
}

.btn {
    display: inline-block;
    padding: 15px 80px;
    font-size: 24px;
    line-height: 34px;
    text-decoration: none;
    border-radius: 4px;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
    border: none;
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline-dark {
    background-color: transparent;
    color: #1d1d1d;
    border: 1px solid #1d1d1d;
    padding: 12px 39px;
    font-size: 20px;
    line-height: 28px;
}

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    max-width: 1920px;
    height: 60px;
    background-color: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(20px);
    z-index: 1200;
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 280px;
    height: 100%;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    width: 270px;
}

.logo-img {
    width: 38px;
    height: 54px;
}

.logo-text {
    margin-left: 10px;
}

.company-name {
    font-size: 20px;
    font-weight: 500;
    line-height: 28px;
    color: #1a1919;
}

.company-english {
    font-size: 12px;
    font-weight: 500;
    line-height: 17px;
    color: #1a1919;
    letter-spacing: 0.48px;
}

.nav-list {
    display: flex;
    list-style: none;
}

.nav-item {
    margin-left: 50px;
}

.nav-item:first-child {
    margin-left: 0;
}

.nav-item a {
    text-decoration: none;
    font-size: 16px;
    line-height: 22px;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.nav-item.active>a {
    color: var(--primary-color);
}

/* 下拉菜单 */
.nav-dropdown {
    position: relative;
}

.nav-dropdown .dropdown-menu {
    position: absolute;
    top: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(0);
    display: none;
    flex-direction: column;
    text-align: center;
    min-width: 280px;
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    padding: 10px 0;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    margin-top: 0;
}

/* 移除hover效果，改为点击触发 */
/* .nav-dropdown:hover .dropdown-menu {
    display: flex;
    opacity: 1;
    visibility: visible;
} */

.dropdown-item {
    display: block;
    padding: 12px 20px;
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    background-color: white;
    white-space: nowrap;
}

.dropdown-item:hover {
    color: var(--primary-color);
}

.dropdown-item.active {
    background-color: #ffffff;
    color: var(--primary-color);
    font-weight: 600;
}

/* 英雄区域 */
.hero {
    position: relative;
    width: 100%;
    max-width: 1920px;
    min-height: 1200px;
    padding-top: 60px;
    margin: 0 auto;
}

.hero-main {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 90px 280px 400px 252px;
    width: 100%;
    min-height: 800px;
    overflow: hidden;
    background-image: url(assets/image/hero-banner@2x.svg);
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
}

.hero-title {
    margin: 0 0 0 28px;
    line-height: 80px;
    letter-spacing: 0;
    color: #000000;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 57px;
    font-weight: 500;
}

.hero-subtitle {
    margin: 1px 0 0 28px;
    line-height: 62px;
    letter-spacing: 0;
    color: #000000;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 44px;
}

.hero-tagline {
    margin: 27px 0 0 28px;
    line-height: 34px;
    letter-spacing: 0;
    color: var(--primary-color);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 24px;
}

/* 产品介绍 */
.product-title {
    margin-top: 60px;
    margin-left: 28px;
    margin-right: 28px;
}

.index-business {
    position: relative;
    top: -230px;
    padding-left: 60px;
    padding-right: 60px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 40px;
    height: 600px;
    z-index: 3
}


/* 产品卡片通用样式 */
.product-card {
    /* background: #ffffff;
    border: 2px solid #ffffff;
    box-shadow: inset 0px 0px 30px 0px rgba(226, 241, 255, 0.5), 0px 4px 10px 0px rgba(194, 198, 221, 0.3);
    padding: 30px 46px;
    border-radius: 8px;
    height: 610px;
    align-items: center;
    overflow: hidden;
    transition: all 0.3s ease;
    position: absolute;
    top: 138px;
    left: 0;
    z-index: 1; */
    background: #ffffff;
    width: 690px;
    height: 480px;
    border: 2px solid #ffffff;
    box-shadow: inset 0px 0px 30px 0px rgba(226, 241, 255, 0.5), 0px 4px 10px 0px rgba(194, 198, 221, 0.3);
    box-sizing: border-box;
    padding: 44px;
    color: #fff;
    position: relative;
    -webkit-transition: all .25s ease;
    -moz-transition: all .25s ease;
    transition: all .25s ease
}

.product-card:hover {
    transform: translateY(-2px);
    box-shadow: inset 0px 0px 30px 0px rgba(226, 241, 255, 0.5), 0px 8px 20px 0px rgba(194, 198, 221, 0.5);
}

/* 产品卡片hover时按钮变色效果 - 尔思数字科教系统和AI智慧运动技能平台 */
.product-card.edu-system:hover .btn-outline,
.product-card.ai-platform:hover .btn-outline ,
.product-card.sports-platform:hover .btn-outline {
    background-color: var(--primary-color);
    color: #ffffff;
    border: 1px solid var(--primary-color);
}

/* 竞技体育运动平台hover时按钮不变色 - 因为"了解更多"功能尚未实现 */
/* .product-card.sports-platform:hover .btn-outline {
    background-color: var(--primary-color);
    color: #ffffff;
    border: 1px solid var(--primary-color);
} */

.card-content {
    flex: 1;
    position: relative;
    z-index: 2;
    max-width: 500px;
}

.card-title {
    line-height: 49px;
    letter-spacing: 0;
    color: #000000;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 30px;
    font-weight: 500;
    margin-bottom: 12px;
}

.card-description {
    margin: 8px 0 24px;
    line-height: 36px;
    letter-spacing: 0.6px;
    color: #000000;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 16px;
}

.card-button {
    display: inline-block;
    margin-top: 60px;
}

.card-button .btn {
    padding: 15px 80px;
    font-size: 24px;
    line-height: 34px;
    border-radius: 4px;
}

.card-image {
    height: 300px;
    object-fit: contain;
    z-index: 1;
    margin-left: 40px;
}

.index-business .product-card .icon {
    position: absolute;
    bottom: -0px;
    right: -60px;
    width: 260px;
    height: 440px;
    background-size: auto 440px !important
}

.index-business .product-card .icon1 {
    position: absolute;
    bottom: 100px;
    right: -60px;
    width: 350px;
    height: 300px;
    background-size: auto 300px !important
}

/* 尔思数字科教系统 */
.edu-system {
    grid-area: 1 / 1 / 3 / 2;
    align-self: center;
    z-index: 3;
}

.edu-system .card-button .btn-primary {
    background: var(--primary-color);
    color: #ffffff;
}

.edu-system .card-image {
    height: 250px;
}

/* AI智慧运动技能平台 */
.ai-platform {
    grid-area: 1 / 2 / 2 / 3;
    z-index: 2;
}

/* 竞技体育运动平台 */
.sports-platform {
    grid-area: 2 / 2 / 3 / 3;
    z-index: 1;
}

/* 关于我们 */
.about {
    position: relative;
    width: 100%;
    max-width: 1920px;
    margin-top: 100px;
    margin-left: auto;
    margin-right: auto;
    /* background: var(--background-light); */
    padding: 60px 280px;
}

.about-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 20px;
    width: fit-content;
}

.about-content {
    background: #ffffff;
    box-shadow: 0px 1px 8px 0px rgba(220, 228, 230, 0.5);
    padding: 57px 88px 60px 138px;
    width: 100%;
    min-height: 591px;
    margin-top: 10px;
}

.about-text {
    width: 100%;
    min-height: 304px;
}

.about-text p {
    line-height: 22px;
    letter-spacing: 0.47px;
    color: var(--secondary-color);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 16px;
    margin-bottom: 15px;
}

.about-stats {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 40px;
    flex-wrap: wrap;
    gap: 30px;
}

.stat-item {
    padding: 20px;
    border-radius: 4px;
    background: #ffffff;
    flex: 1;
    min-width: 250px;
    text-align: left;
}

.stat-header {
    display: flex;
    align-items: flex-end;
    flex-wrap: nowrap;
}

.stat-number {
    letter-spacing: 1.76px;
    color: var(--primary-color);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 60px;
    font-weight: 600;
    line-height: 1;
    flex-shrink: 0;
}

.stat-label {
    margin-left: 10px;
    line-height: 25px;
    letter-spacing: 0.53px;
    color: #000000;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 15px;
    font-weight: 500;
}

.stat-description {
    margin: 20px 0 0;
    line-height: 20px;
    letter-spacing: 0.41px;
    color: var(--secondary-color);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 14px;
}

/* 解决方案banner */
.solutions-banner {
    position: relative;
    width: 100%;
    max-width: 1920px;
    min-height: 712px;
    margin: 0 auto;
    padding: 90px 280px 189px;
    display: flex;
    align-items: center;
    gap: 60px;
     background-image: url('./assets/image/banner2.svg');
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    overflow: hidden;
}
.athletics-solutions{

 background-image: url('./assets/image/banner4.svg');

}

.solutions-banner-home {
    background-image: url('./assets/image/banner3.svg');
    padding: 90px 280px 316px;
}

/* 功能切换tab栏 */
.solutions-tabs {
    position: sticky;
    top: 60px;
    z-index: 1100;
    background: #ffffff;
    border-top: 1px solid rgba(0, 87, 255, 0.2);
    border-bottom: 1px solid rgba(0, 87, 255, 0.2);
}

.tabs-container {
    display: flex;
    max-width: 1920px;
    margin: 0 auto;
    padding: 0 280px;
    width: 100%;
    box-sizing: border-box;
}

.tab-item {
    flex: 1;
    /* max-width: 450px; */
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align:center;
    text-decoration: none;
    font-size: 20px;
    font-weight: 500;
    color: #0057ff;
    transition: all 0.3s ease;
    border-right: 1px solid rgba(0, 87, 255, 0.2);
}

.tab-item:last-child {
    border-right: none;
}

.tab-item.active {
    background: #0057ff;
    color: #ffffff;
    text-align: center;
}

.tab-item:hover:not(.active) {
    background: rgba(0, 87, 255, 0.05);
}

.banner-content {
    flex: 1;
}

.solutions-banner-home .banner-content {
    max-width: 1085px;
}

.banner-title {
    line-height: 80px;
    font-size: 57px;
    font-weight: 500;
    color: #000000;
    margin-bottom: 52px;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
}

.banner-text {
    font-size: 26px;
    line-height: 36px;
    color: #1d1d1d;
    margin-bottom: 20px;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
}

.banner-text {
    font-size: 20px;
    color: #1d1d1d;
    margin-bottom: 20px;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
}

.banner-image {
    flex: 1;
    max-width: 500px;
}

.banner-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
}

/* 解决方案 */
.solutions {
    position: relative;
    margin-top: 100px;
    width: 100%;
    max-width: 1920px;
    margin-left: auto;
    margin-right: auto;
    padding: 60px 280px;
}

.solutions-page {
    position: relative;
    margin-top: 0;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding: 0;
}

/* 场景、功能、价值部分的容器 */
.scenarios-section {
    /* padding: 60px 280px; */
    max-width: 1920px;
    margin: 0 auto;
}

/* 响应式调整 */
@media (max-width: 1200px) {
    .scenarios-section {
        padding: 60px 100px;
    }

    .full-width-images {
        margin: 0 -100px;
        width: calc(100% + 200px);
    }
}

@media (max-width: 480px) {
    .scenarios-section {
        padding: 60px 20px;
    }

    .full-width-images {
        margin: 0 -20px;
        width: calc(100% + 40px);
    }
}

.solutions-home-page {
    position: relative;
    margin-top: 0;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding: 0;
}

.solutions-header {
    text-align: center;
    margin-bottom: 40px;
}

.solutions-header .section-title {
    font-size: 32px;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 20px;

}

/* 解决方案导航 */
.solutions-nav {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 40px 0;
    padding: 20px 0;
    border-bottom: 1px solid #e0e0e0;
}

.solutions-nav-item {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.solutions-nav-item:hover {
    color: var(--primary-color);
    background: rgba(0, 87, 255, 0.1);
}

.solutions-nav-item.active {
    color: var(--primary-color);
    background: rgba(0, 87, 255, 0.1);
    font-weight: 600;
}

.solutions-intro {
    max-width: 1000px;
    margin: 0 auto 60px;
    text-align: center;
}

.solutions-desc {
    font-size: 18px;
    line-height: 32px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.solutions-section-title {
    text-align: center;
    margin: 60px 0 40px;
}

.solutions-section-title h4 {
    font-size: 28px;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 15px;
}

.section-divider-small {
    width: 120px;
    height: 11px;
}

/* 解决方案项目 */
.solution-item {
    display: flex;
    align-items: center;
    /* padding: 60px 280px; */
    justify-content: space-between;
    margin-bottom: 60px;
    gap: 60px;
}

.solution-item-reverse {
    flex-direction: row-reverse;
}

.solution-image-only {
    display: block;
    width: 100%;
    text-align: center;
    margin: 40px 0;
}

.solution-image-only img {
    width: 100%;
    height: auto;
    border-radius: 8px;
}

.video-container {
    position: relative;
    width: 100%;
    border-radius: 8px;
    overflow: hidden;
}

.video-container video {
    width: 100%;
    height: auto;
    display: block;
}

.image-grid {
    display: flex;
    /* padding: 60px 280px; */
    gap: 20px;
    margin: 40px 0;
    width: 100%;
}

.image-grid img {
    flex: 1;
    width: 48%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0px 4px 15px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
    .image-grid {
        flex-direction: column;
    }

    .image-grid img {
        width: 100%;
        margin-bottom: 20px;
    }
}

.solution-content {
    flex: 1;
    max-width: 500px;
}

.solution-title {
    font-size: 36px;
    font-weight: 500;
    color: #1d1d1d;
    margin-bottom: 20px;
}

.solution-line {
    width: 107px;
    height: 2px;
    background: #0057ff;
    margin-bottom: 30px;
}

.solution-points {
    display: flex;
    flex-direction: column;
    gap: 45px;
    margin-bottom: 20px;
}

.solution-dot {
    width: 6px;
    height: 6px;
    background: #666666;
    border-radius: 50%;
}

.solution-texts {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.solution-texts p {
    font-size: 20px;
    line-height: 30px;
    color: #1d1d1d;
}

.solution-image {
    flex: 1;
    max-width: 700px;
}

.solution-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
}

/* 系统功能 */
.system-functions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.function-card {
    background: #ffffff;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0px 1px 8px 0px rgba(220, 228, 230, 0.5);
}

.function-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
}

.function-header h5 {
    font-size: 24px;
    font-weight: 500;
    color: #1d1d1d;
}

.function-tag {
    font-size: 14px;
    color: var(--primary-color);
    background: rgba(0, 87, 255, 0.1);
    padding: 5px 10px;
    border-radius: 4px;
}

.function-desc {
    font-size: 16px;
    line-height: 26px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.function-subtitle {
    font-size: 20px;
    font-weight: 500;
    color: #1d1d1d;
    margin-bottom: 20px;
}

.function-content {
    display: flex;
    gap: 20px;
    align-items: center;
}

.function-content img {
    width: 120px;
    height: auto;
}

.function-content p {
    font-size: 16px;
    line-height: 26px;
    color: var(--text-secondary);
}

/* 大数据中心 */
.big-data-center {
    /* background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%); */
    border-radius: 8px;
    /* padding: 40px; */
    /* padding: 60px 280px; */
    text-align: center;
    margin-bottom: 60px;
}

.big-data-center h5 {
    font-size: 24px;
    font-weight: 500;
    color: #ffffff;
    margin-bottom: 20px;
}

.big-data-center p {
    font-size: 16px;
    line-height: 28px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 30px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.big-data-center1 {
    width: 100vw;
    text-align: center;
    margin: 40px 0;
}

.big-data-center1 img {
    width: 100%;
    height: auto;
    display: block;
    margin: 0;
}


.big-data-center img {
    width: 100%;
    /* max-width: 900px; */
    height: auto;
    border-radius: 8px;
}

/* 方案价值 */
.value-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.value-card {
    background: #ffffff;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0px 1px 8px 0px rgba(220, 228, 230, 0.5);
    display: flex;
    flex-direction: column;
}

.value-card h5 {
    font-size: 20px;
    font-weight: 500;
    color: #1d1d1d;
    margin-bottom: 15px;
    line-height: 28px;
}

.value-card p {
    font-size: 16px;
    line-height: 26px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    flex: 1;
}

.value-card img {
    width: 100%;
    max-width: 200px;
    height: auto;
    align-self: flex-end;
}

/* AI智能居家运动方案页面 */
.solutions-home-page {
    position: relative;
    margin-top: 100px;
    width: 100%;
    max-width: 1920px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 20px;
}

.solutions-home-header {
    text-align: center;
    margin-bottom: 60px;
    padding: 60px 0;
    background: linear-gradient(135deg, #f5f9ff 0%, #e6f0ff 100%);
    border-radius: 12px;
}

.solutions-home-header .section-title {
    font-size: 36px;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 30px;
}

.solutions-home-desc {
    font-size: 18px;
    line-height: 32px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.solutions-home-section-title {
    text-align: center;
    margin: 80px 0 40px;
}

.solutions-home-section-title h4 {
    font-size: 28px;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 15px;
}

/* 课程体系 */
.course-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 80px;
}

.course-item {
    background: #ffffff;
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    box-shadow: 0px 4px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.course-item:hover {
    transform: translateY(-5px);
    box-shadow: 0px 8px 25px rgba(0, 0, 0, 0.12);
}

.course-item img {
    width: 100%;
    max-width: 300px;
    height: auto;
    margin-bottom: 20px;
    border-radius: 8px;
}

.course-title {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-color);
    line-height: 26px;
}

/* 方案价值 */
.value-grid-home {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-bottom: 80px;
}

.value-item-home {
    display: flex;
    align-items: flex-start;
    gap: 30px;
    background: #ffffff;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0px 4px 15px rgba(0, 0, 0, 0.08);
}

.value-item-home img {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
}

.value-content-home {
    flex: 1;
}

.value-content-home h5 {
    font-size: 22px;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 15px;
}

.value-content-home p {
    font-size: 16px;
    line-height: 26px;
    color: var(--text-secondary);
}

/* 公司资质 */
.certificates {
    position: relative;
    margin-top: 100px;
    width: 100%;
    max-width: 1360px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 20px;
}

.certificates-header {
    position: relative;
    width: 100%;
    height: 45px;
    overflow: hidden;
    text-align: center;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.certificates-header .section-title {
    position: relative;
    height: 45px;
    line-height: 45px;
    letter-spacing: 0;
    color: var(--text-color);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 32px;
    font-weight: 500;
    margin: 0;
    background: #ffffff;
    padding: 0 30px;
    z-index: 10;
}

.certificates-header .section-divider {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 1px;
    margin: 0;
    transform: translateY(-50%);
    z-index: 5;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 10px;
    margin: 38px 0 0;
    width: 100%;
}

.certificate-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background: #ffffff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0px 1px 8px 0px rgba(220, 228, 230, 0.5);
    /* border: 2px solid #FFD700; */
}

.certificate-item-full {
    grid-column: 1 / -1;
    align-items: stretch;
    padding: 0;
    overflow: hidden;
}

.certificate-dual-images {
    width: 100%;
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    gap: 0;
}

.certificate-item-full .certificate-image {
    display: block;
    width: auto;
    flex: 0 0 auto;
    max-width: none;
    height: auto;
    object-fit: contain;
}

.certificate-image {
    width: 250px;
    height: 180px;
    object-fit: contain;
}

.certificate-image-previewable {
    cursor: zoom-in;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.certificate-item:hover .certificate-image-previewable {
    transform: translateY(-2px);
}

.certificate-title {
    margin: 14px 0 0;
    line-height: 22px;
    letter-spacing: 0;
    color: #515151;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 16px;
    text-align: center;
    width: 240px;
}

.certificate-lightbox {
    position: fixed;
    inset: 0;
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px;
    background: rgba(13, 21, 34, 0.72);
    backdrop-filter: blur(3px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.certificate-lightbox.is-open {
    opacity: 1;
    visibility: visible;
}

.certificate-lightbox-content {
    position: relative;
    width: min(92vw, 1180px);
    max-height: 92vh;
    padding: 14px 14px 10px;
    border-radius: 12px;
    background: #ffffff;
    box-shadow: 0px 12px 36px rgba(0, 0, 0, 0.25);
}

.certificate-lightbox-image {
    display: block;
    width: 100%;
    max-height: calc(92vh - 88px);
    object-fit: contain;
    border-radius: 8px;
}

.certificate-lightbox-caption {
    margin: 10px 0 2px;
    text-align: center;
    line-height: 20px;
    color: #515151;
    font-size: 14px;
}

.certificate-lightbox-close {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 50%;
    background: rgba(17, 24, 39, 0.75);
    color: #ffffff;
    font-size: 14px;
    line-height: 32px;
    text-align: center;
    cursor: pointer;
    transition: background 0.2s ease;
}

.certificate-lightbox-close:hover {
    background: rgba(17, 24, 39, 0.92);
}

.footer-qr-previewable {
    cursor: zoom-in;
    transition: transform 0.2s ease;
}

.footer-qr-previewable:hover {
    transform: translateY(-1px);
}

.qr-lightbox {
    position: fixed;
    inset: 0;
    z-index: 3200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(13, 21, 34, 0.72);
    backdrop-filter: blur(3px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.qr-lightbox.is-open {
    opacity: 1;
    visibility: visible;
}

.qr-lightbox-content {
    position: relative;
    width: min(92vw, 420px);
    border-radius: 12px;
    padding: 16px 16px 14px;
    background: #ffffff;
    text-align: center;
    box-shadow: 0px 12px 36px rgba(0, 0, 0, 0.25);
}

.qr-lightbox-image {
    display: block;
    width: 100%;
    max-height: 62vh;
    object-fit: contain;
    border-radius: 8px;
}

.qr-lightbox-caption {
    margin: 10px 0 12px;
    color: #515151;
    font-size: 14px;
    line-height: 20px;
}

.qr-lightbox-download {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 112px;
    height: 36px;
    padding: 0 14px;
    border-radius: 18px;
    background: #0057ff;
    color: #ffffff;
    text-decoration: none;
    font-size: 14px;
    line-height: 20px;
}

.qr-lightbox-close {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 50%;
    background: rgba(17, 24, 39, 0.75);
    color: #ffffff;
    font-size: 18px;
    line-height: 32px;
    text-align: center;
    cursor: pointer;
}

/* 新闻动态 */
.news {
    position: relative;
    margin-top: 100px;
    width: 100%;
    max-width: 1920px;
    min-height: 343px;
    margin-left: auto;
    margin-right: auto;
    background: var(--background-light);
    padding: 60px 280px;
}

.news-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 60px;
}

.news-header .section-header {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.news-grid {
    display: flex;
    justify-content: space-between;
    gap: 30px;
    width: 100%;
}

.news-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 33%;
    min-height: 352px;
    overflow: hidden;
    background: #ffffff;
    text-decoration: none;
    /* 核心代码：去掉下划线 */
    box-shadow: 0px 1px 8px 0px rgba(220, 228, 230, 0.5);
    padding: 20px;
    border-radius: 8px;
    justify-content: space-between;
}

.news-image {
    width: 100%;
    height: 240px;
    object-fit: cover;
    border-radius: 4px;
}

.news-title {
    margin: 20px 0 0;
    width: 100%;
    letter-spacing: 0;
    color: var(--text-color);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 20px;
    font-weight: 600;
    text-align: left;
    height: 80px;
    display: flex;
    align-items: flex-start;
}

.news-date {
    margin: 14px 0 0;
    width: 100%;
    letter-spacing: 0;
    color: var(--text-color);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 16px;
    text-align: left;
    margin-top: auto;
}

/* 页脚 */
.footer {
    position: relative;
    margin-top: 100px;
    width: 100%;
    max-width: 1920px;
    min-height: 320px;
    background-image: url(https://earthpublic.oss-cn-shenzhen.aliyuncs.com/website/mn87km4w-wlnj28h.png);
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    margin-left: auto;
    margin-right: auto;
    /* padding-bottom: 120px; */
}

.footer-content {
    padding: 36px 280px;
    height: 100%;
}

.footer-info {
    display: flex;
    position: relative;
    left: 0;
    align-items: flex-start;
    width: 100%;
    min-height: 188px;
    gap: 40px;
    justify-content: space-between;
    flex-wrap: wrap;
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-top: 17px;
    width: 328px;
    min-width: 328px;
    height: 74px;
    overflow: hidden;
}

.footer-logo-img {
    width: 52px;
    height: 74px;
    margin-right: 5px;
}

/* .footer-logo-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    align-self: stretch;
} */

.footer-company-name {
    line-height: 34px;
    letter-spacing: 0.36px;
    color: #fff;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 24px;
    font-weight: 500;
}

.footer-company-english {
    margin: 3px 0 0;
    line-height: 21px;
    letter-spacing: 0.23px;
    color: #fff;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 15px;
    font-weight: 500;
}

.footer-divider {
    margin-top: 4px;
    width: 1px;
    height: 130px;
    background: rgba(255, 255, 255, 0.3);
}

.footer-social {
    display: flex;
    align-items: flex-start;
    gap: 40px;
}

.social-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    align-self: stretch;
    margin-top: 2px;
}

.social-image {
    width: 130px;
    height: 128px;
}

.social-text {
    margin: 16px 0 0;
    line-height: 20px;
    letter-spacing: 0;
    color: #ffffff;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 14px;
    font-weight: 300;
}

/* 官方抖音号：桌面显示，手机端隐藏（与此前手机去掉抖音一致） */
body.is-mobile .social-item-douyin {
    display: none !important;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-top: 17px;
}

.contact-item {
    line-height: 22px;
    letter-spacing: 0;
    color: #ffffff;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 30px;
}

.footer-bottom {
    display: flex;
    position: relative;
    align-items: center;
    background: #131b2a;
    /* padding: 34px 280px 26px; */
    width: 100%;
    min-height: 100px;
    justify-content: space-between;
    margin-top: 20px;
}

.footer-legal {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-start;
    gap: 8px 14px;
}

.footer-beian-row {
    display: inline-flex;
    flex-direction: row;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.legal-image {
    margin: 0;
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    display: block;
    object-fit: contain;
    align-self: center;
}

.legal-beian-link {
    margin: 0;
    padding: 0;
    text-decoration: none;
    color: var(--text-light);
    line-height: 20px;
    white-space: nowrap;
}

.footer-beian-row .legal-beian-link,
.footer-beian-row .legal-text {
    margin: 0;
}

.footer-visitor-count {
    margin: 0;
    padding: 0;
    line-height: 20px;
    letter-spacing: 0;
    color: var(--text-light);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    align-self: center;
}

.footer-legal .footer-visitor-count.legal-text {
    margin: 0;
}

/* 子页：备案区为图标 + 段落（无 footer-beian-row）时与图标同一行对齐 */
.footer-legal > p.legal-text {
    margin: 0;
    margin-left: 8px;
    line-height: 20px;
    display: inline-flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px 10px;
}

.legal-text {
    margin: 8px 0 0 11px;
    line-height: 20px;
    letter-spacing: 0;
    color: var(--text-light);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
}

.footer-certs {
    display: flex;
    align-items: center;
    gap: 40px;
}

.cert-item {
    margin-left: 0;
}

.cert-text {
    line-height: 20px;
    letter-spacing: 0;
    color: var(--text-light);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", SimHei, Arial, Helvetica, sans-serif;
    font-size: 14px;
    text-align: center;
}

/* 响应式设计 */
@media (max-width: 1200px) {

    .header-container,
    .hero-main,
    .product-section,
    .about,
    .news,
    .footer-content,
    .footer-bottom {
        padding: 0 100px;
    }

    .product-card {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }

    .card-content {
        max-width: 100%;
    }

    .card-image {
        max-width: 80%;
    }

    .ai-platform,
    .sports-platform {
        flex-direction: column;
    }

    .news-grid {
        flex-direction: column;
        align-items: center;
    }

    .news-item {
        width: 100%;
        max-width: 430px;
        text-decoration: none;
        /* 核心代码：去掉下划线 */
    }

    .certificates-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-info {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-contact {
        align-items: center;
    }
}

@media (max-width: 768px) {

    .header-container,
    .hero-main,
    .product-section,
    .about,
    .news,
    .footer-content,
    .footer-bottom {
        padding: 0 50px;
    }

    .hero-title {
        font-size: 36px;
        line-height: 48px;
    }

    .hero-subtitle {
        font-size: 24px;
        line-height: 36px;
    }

    .hero-tagline {
        font-size: 18px;
        line-height: 24px;
    }

    .section-title {
        font-size: 28px;
        line-height: 36px;
    }

    .about-content {
        padding: 30px;
    }

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

    .nav-list {
        display: none;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 20px;
    }

    /* 解决方案响应式 */
    .solution-item {
        flex-direction: column;
        gap: 30px;
    }

    .solution-item-reverse {
        flex-direction: column;
    }

    .solution-content {
        max-width: 100%;
    }

    .solution-title {
        font-size: 28px;
    }

    .solution-texts p {
        font-size: 18px;
    }

    .system-functions {
        grid-template-columns: 1fr;
    }

    .value-grid {
        grid-template-columns: 1fr;
    }

    /* AI智能居家运动方案响应式 */
    .course-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .value-grid-home {
        grid-template-columns: 1fr;
    }

    .value-item-home {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
}

@media (max-width: 480px) {

    .header-container,
    .hero-main,
    .product-section,
    .about,
    .news,
    .footer-content,
    .footer-bottom {
        padding: 0 20px;
    }

    .hero-title {
        font-size: 28px;
        line-height: 36px;
        margin-left: 0;
    }

    .hero-subtitle {
        font-size: 20px;
        line-height: 28px;
        margin-left: 0;
    }

    .hero-tagline {
        font-size: 16px;
        line-height: 20px;
        margin-left: 0;
    }

    .section-title {
        font-size: 24px;
        line-height: 32px;
    }

    .card-description {
        font-size: 16px;
        line-height: 24px;
    }

    .certificates-grid {
        grid-template-columns: 1fr;
    }

    .btn {
        padding: 10px 40px;
        font-size: 18px;
        line-height: 24px;
    }

    /* 解决方案小屏幕响应式 */
    .solutions,
    .solutions-page,
    .solutions-home-page {
        padding: 60px 100px;
    }

    .tabs-container {
        padding: 0 100px;
    }

    .solutions-header .section-title {
        font-size: 24px;
    }

    .solutions-desc {
        font-size: 16px;
        line-height: 28px;
    }

    .solutions-section-title h4 {
        font-size: 22px;
    }

    .solution-title {
        font-size: 24px;
    }

    .solution-texts p {
        font-size: 16px;
        line-height: 26px;
    }

    .function-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .function-content {
        flex-direction: column;
    }

    .big-data-center {
        padding: 20px;
    }

    .big-data-center h5 {
        font-size: 20px;
    }

    /* AI智能居家运动方案小屏幕响应式 */
    .solutions-home-header .section-title {
        font-size: 24px;
    }

    .solutions-home-desc {
        font-size: 16px;
        line-height: 28px;
    }

    .solutions-home-section-title h4 {
        font-size: 22px;
    }

    .course-grid {
        grid-template-columns: 1fr;
    }

    .course-item img {
        max-width: 250px;
    }

    .course-title {
        font-size: 16px;
    }

    .value-item-home {
        padding: 20px;
    }

    .value-item-home img {
        width: 100px;
        height: 100px;
    }

    .value-content-home h5 {
        font-size: 20px;
    }

    /* 解决方案banner响应式 */
    .solutions-banner {
        flex-direction: column;
        padding: 60px 20px 120px;
        text-align: center;
    }

    .solutions-banner-home {
        padding: 60px 20px 180px;
    }

    .banner-title {
        font-size: 36px;
        line-height: 48px;
        margin-bottom: 30px;
    }

    .banner-text {
        font-size: 18px;
        line-height: 28px;
    }

    .banner-content {
        max-width: 100%;
    }

    .banner-image {
        max-width: 100%;
    }

    /* 解决方案页面小屏幕响应式 */
    .solutions,
    .solutions-page,
    .solutions-home-page {
        padding: 60px 20px;
    }

    .tabs-container {
        flex-direction: column;
        padding: 0 20px;
    }

    .tab-item {
        max-width: 100%;
        border-right: none;
        border-bottom: 1px solid rgba(0, 87, 255, 0.2);
    }

    .tab-item:last-child {
        border-bottom: none;
    }


}