/* ============================================
   尚掣智能官网 - 样式表
   ============================================ */

:root {
    --brand: #0056B3;
    --card-bg: rgba(255, 255, 255, 0.85);
    --text: #1D1D1F;
    --dim: #424245;
    --apple-ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础重置 */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Source Han Sans SC", "Noto Sans SC", "Source Han Sans", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: #000;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* 背景随动系统层 */
#bg-container {
    position: fixed;
    inset: 0;
    z-index: -2;
    transition: 1.5s var(--apple-ease);
}

.bg-layer {
    position: absolute;
    inset: -10%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.5s var(--apple-ease), transform 1s linear;
    filter: brightness(0.65);
}

.bg-layer.active {
    opacity: 1;
}

.bg-layer-1 {
    background-image: url('../images/beijing.jpg');
}

.bg-layer-2 {
    background-image: url('../images/beijing.jpg');
}

.bg-layer-3 {
    background-image: url('../images/beijing.jpg');
}

.bg-layer-4 {
    background-image: url('../images/beijing.jpg');
}

.glass-overlay {
    position: fixed;
    inset: 0;
    z-index: -1;
    background: rgba(255, 255, 255, 0.55);
    /*    backdrop-filter: blur(50px) saturate(180%);
        -webkit-backdrop-filter: blur(50px) saturate(180%);*/
}

/* 顶部导航 */
header {
    position: fixed;
    top: 0;
    width: 100%;
    height: 72px;
    background: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(25px) saturate(180%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 2000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
}

.logo-box {
    height: 42px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-box img {
    height: 100%;
    width: auto;
    object-fit: contain;
}

.logo-text {
    color: var(--brand);
    font-size: 20px;
    font-weight: 1000;
    letter-spacing: 0.1em;
}

nav > a {
    text-decoration: none;
    color: var(--text);
    font-size: 20px;
    font-weight: 600;
    margin-left: 25px;
    opacity: 0.7;
    transition: 0.3s;
}

nav > a:first-child {
    margin-left: 0;
}

nav > a:hover {
    opacity: 1;
    color: var(--brand);
}

/* 确保下拉菜单容器与其他菜单项间距一致 */
.dropdown {
    margin-left: 25px;
}

/* 下拉菜单样式 */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    text-decoration: none;
    color: var(--text);
    font-size: 20px;
    font-weight: 600;
    opacity: 0.7;
    transition: 0.3s;
    display: inline-block;
}

.dropdown-toggle:hover {
    opacity: 1;
    color: var(--brand);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: none;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    padding: 8px 0;
    margin-top: 5px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    min-width: 120px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    pointer-events: auto;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.dropdown-menu {
    pointer-events: none;
}

.dropdown-item {
    display: block;
    padding: 8px 20px;
    color: var(--text);
    text-decoration: none;
    font-size: 16px;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.dropdown-item:hover {
    color: var(--brand);
    background: rgba(0, 86, 179, 0.05);
}

/* 标题样式 */
.section-header {
    padding: 120px 8% 40px;
    text-align: center;
}

.section-header h2 {
    font-size: 56px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.section-header p {
    color: var(--brand);
    font-size: 18px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* 首页 Anchor */
.hero-anchor {
    height: 88vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 10%;
}

.hero-anchor h1 {
    font-size: clamp(40px, 8vw, 88px);
    font-weight: 800;
    line-height: 1.05;
    margin: 24px 0;
}

.hero-anchor h1 span {
    color: var(--brand);
}

.hero-anchor p {
    margin: 0;
}

/* 三段叙事卡片 */
.story-section {
    min-height: 100vh;
    position: relative;
}

.sticky-box {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 90vh;
    overflow: hidden;
}

.apple-card {
    width: 80%;
    min-height: 70vh;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 48px;
    overflow: hidden;
    opacity: 1;
    transform: scale(1);
    transition: 0.1s;
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.1);
    position: relative;
}

.content-layer {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    flex-direction: column;
    background: linear-gradient(90deg, rgb(244, 244, 244, 0.7) 0%, rgb(244, 244, 244, 0.7) 100%);
}

.scroll-x-container {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    width: 100%;
    height: auto;
    min-height: 600px;
}

.scroll-x-container::-webkit-scrollbar {
    display: none;
}

.scroll-item {
    flex: 0 0 100%;
    width: 100%;
    scroll-snap-align: start;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 6%;
    gap: 50px;
}

.item-text {
    flex: 1;
    min-width: 0;
    text-align: left;
}

.item-image {
    flex: 0 0 44%;
    max-width: 520px;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.item-image img {
    width: 100%;
    height: auto;
    display: block;
}


.chapter-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 86, 179, 0.1);
    color: var(--brand);
    border-radius: 100px;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.card-dots {
    position: absolute;
    bottom: 40px;
    left: 8%;
    display: flex;
    gap: 12px;
    z-index: 10;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.1);
    transition: 0.4s var(--apple-ease);
}

.dot.active {
    background: var(--brand);
    width: 24px;
    border-radius: 4px;
}

.content-layer h2 {
    font-size: clamp(28px, 3.5vw, 48px);
    margin-bottom: 24px;
    font-weight: 800;
    line-height: 1.2;
}

.section-title {
    color: inherit;
    text-decoration: none;
    display: block;
}

.section-title:hover {
    color: var(--brand);
}

.content-layer p {
    font-size: 20px;
    color: var(--dim);
    max-width: 680px;
    line-height: 1.6;
    margin-bottom: 15px;
}

.scroll-item h3 {
    font-size: 32px;
    margin-bottom: 16px;
    color: var(--brand);
    font-weight: 700;
}

/* 货架卡片 */
.shelf {
    display: flex;
    overflow-x: auto;
    gap: 30px;
    padding: 20px 8% 120px;
    scrollbar-width: none;
}

.shelf-card {
    flex: 0 0 400px;
    background: rgba(255, 255, 255, 0.85);
    border-radius: 36px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
    transition: 0.5s var(--apple-ease);
}

.shelf-card:hover {
    transform: translateY(-15px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.1);
}

.shelf-img {
    width: 100%;
    height: 260px;
    overflow: hidden;
}

.shelf-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.shelf-info {
    padding: 40px;
}

.shelf-info h3 {
    color: var(--brand);
    margin-bottom: 12px;
    font-size: 30px;
}

.shelf-info p {
    font-size: 17px;
    color: var(--dim);
    line-height: 1.6;
}

/* 合作伙伴网格 */
.partner-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 30px;    /*格子间距*/
    padding: 0 8% 80px;  /*图片高度*/
}

.partner-grid img {
    width: 100%;
    height: 100px;  /*底部间距：120px*/
    object-fit: contain;
    background: rgba(255, 255, 255, 0.85);
    border-radius: 12px;
    padding: 10px;  /* 图片内边距：10px → 8px*/
}

/* 业绩案例网格 */
.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(450px, 1fr));
    gap: 30px;
    padding: 0 8% 150px;
}

.case-tile {
    height: 550px;
    border-radius: 44px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    transition: 0.7s var(--apple-ease);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.case-tile:hover {
    transform: scale(1.03);
}

.case-tile img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: 1.5s;
}

.case-overlay {
    position: absolute;
    inset: 0;
    padding: 40px;
    background: linear-gradient(to top, rgba(255, 255, 255, 1) 0%, transparent 60%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
}

.case-tag {
    font-size: 14px;
    font-weight: 700;
    color: var(--brand);
    letter-spacing: 2px;
}

/* 下钻详情层 */
#detailCanvas {
    position: fixed;
    inset: 0;
    background: #FFFFFF;
    z-index: 5000;
    display: none;
    overflow-y: auto;
    opacity: 0;
    transform: translateY(100px);
    transition: all 0.6s var(--apple-ease);
}

#detailCanvas.active {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.canvas-nav {
    position: sticky;
    top: 0;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 5%;
    z-index: 5100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(30px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.canvas-close {
    width: 44px;
    height: 44px;
    padding: 0;
    background: #F5F5F7;
    border-radius: 50%;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font: inherit;
    font-weight: bold;
}

.canvas-close:hover {
    background: #E8E8ED;
}

.canvas-hero {
    width: 100%;
    height: 75vh;
    overflow: hidden;
    background: #000;
    position: relative;
}

.canvas-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.8;
}

.hero-title-box {
    position: absolute;
    bottom: 80px;
    left: 8%;
    color: #FFF;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.hero-title-box h1 {
    font-size: 68px;
    font-weight: 800;
    letter-spacing: -2px;
    margin-bottom: 15px;
}

.hero-title-box p {
    font-size: 24px;
    opacity: 0.9;
}

.canvas-body {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px 5% 200px;
}

.canvas-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin: 60px 0 100px;
    border-top: 1px solid #E8E8ED;
    border-bottom: 1px solid #E8E8ED;
    padding: 50px 0;
}

.stat-item span {
    display: block;
    font-size: 14px;
    color: var(--dim);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.stat-item b {
    font-size: 36px;
    color: var(--brand);
    font-weight: 800;
}

.article-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
    margin-bottom: 150px;
}

.article-section.reverse {
    direction: rtl;
}

.article-section.reverse .text-wrap {
    direction: ltr;
}

.img-wrap {
    border-radius: 40px;
    overflow: hidden;
    box-shadow: 0 50px 100px rgba(0, 0, 0, 0.1);
    position: relative;
}

.img-wrap img {
    width: 100%;
    height: auto;
    display: block;
}

.text-wrap h3 {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 30px;
    line-height: 1.2;
}

.text-wrap p {
    font-size: 20px;
    color: var(--dim);
    line-height: 1.8;
}

/* 页脚 */
footer {
    padding: 120px 8% 60px;
    background: #000;
    color: #FFF;
    position: relative;
    z-index: 10;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 80px;
    justify-items: center;
    align-items: center;
}

.brand-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.contact-link {
    font-size: 24px;
    color: var(--brand);
    text-decoration: none;
    font-weight: 700;
    display: block;
    margin-top: 10px;
}

.contact-p {
    font-size: 16px;
    text-decoration: none;
    font-weight: 700;
    display: block;
    margin-top: 10px;
}

.contact-link:hover {
    text-decoration: underline;
}

/* Hero 按钮 */
.hero-cta {
    display: flex;
    gap: 16px;
    margin-top: 32px;
    flex-wrap: wrap;
    justify-content: center;
}

.cta-primary,
.cta-secondary {
    padding: 14px 32px;
    border-radius: 100px;
    font-size: 16px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s var(--apple-ease);
}

.cta-primary {
    background: var(--brand);
    color: #FFF;
}

.cta-primary:hover {
    background: #004494;
    transform: translateY(-2px);
}

.cta-secondary {
    background: rgba(255, 255, 255, 0.8);
    color: var(--brand);
    border: 2px solid var(--brand);
}

.cta-secondary:hover {
    background: var(--brand);
    color: #FFF;
}

/* 优势项 */
.advantage-items {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 24px;
}

.advantage-item {
    padding: 20px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.advantage-item h4 {
    color: var(--brand);
    font-size: 18px;
    margin-bottom: 8px;
    font-weight: 700;
}

.advantage-item p {
    font-size: 14px !important;
    line-height: 1.5;
    margin-bottom: 0;
}

/* 英文站副标题 */
.section-subtitle {
    color: var(--dim);
    font-size: 16px;
    max-width: 700px;
    margin: 16px auto 0;
    line-height: 1.6;
}

/* 角色标签 */
.role {
    color: var(--brand);
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 12px;
}

.copyright {
    margin-top: 100px;
    padding-top: 40px;
    border-top: 1px solid #1c1c1e;
    color: #444;
    font-size: 12px;
    text-align: center;
}

/* 汉堡菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    gap: 5px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: all 0.3s var(--apple-ease);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端导航 */
.mobile-nav {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    padding: 20px;
    flex-direction: column;
    gap: 0;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    z-index: 1999;
    transform: translateY(-100%);
    opacity: 0;
    transition: all 0.3s var(--apple-ease);
    pointer-events: none;
}

.mobile-nav.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav a {
    display: block;
    padding: 16px 0;
    color: var(--text);
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: color 0.2s;
}

.mobile-nav a:last-child {
    border-bottom: none;
}

.mobile-nav a:hover {
    color: var(--brand);
}

/* 响应式 */
@media (max-width: 1024px) {
    .footer-grid,
    .canvas-stats,
    .article-section {
        grid-template-columns: 1fr;
    }

    .scroll-item {
        flex-direction: column;
        align-items: center;
        justify-content: center;
        text-align: center;
        padding: 40px 5%;
        gap: 40px;
    }

    .item-image {
        flex: 0 0 auto;
        width: 100%;
        max-width: 100%;
    }

    .item-text {
        max-width: 100%;
        text-align: center;
    }


    .hero-title-box h1 {
        font-size: 42px;
    }
}

/* 平板设备 */
@media (max-width: 768px) {
    header {
        height: 60px;
        padding: 0 4%;
    }

    .logo-box img {
        height: 32px;
    }

    .logo-text {
        font-size: 16px;
    }

    nav > a,
    .dropdown-toggle {
        font-size: 14px;
        margin-left: 12px;
    }

    .dropdown {
        margin-left: 12px;
    }

    /* 移动端菜单 */
    nav {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .mobile-nav {
        display: flex;
    }

    .section-header {
        padding: 80px 4% 30px;
    }

    .section-header h2 {
        font-size: 36px;
    }

    .section-header p {
        font-size: 14px;
    }

    .hero-anchor {
        height: auto;
        min-height: 70vh;
        padding: 80px 5% 40px;
    }

    .hero-anchor > p:first-child {
        font-size: 11px;
        letter-spacing: 0.5px;
    }

    .hero-anchor h1 {
        font-size: clamp(28px, 9vw, 48px);
    }

    .hero-anchor > p:nth-of-type(2) {
        font-size: 14px;
        line-height: 1.4;
        max-width: 90%;
    }

    .apple-card {
        width: 90%;
        border-radius: 32px;
    }

    .scroll-x-container {
        min-height: auto;
    }

    .scroll-item {
        padding: 24px 5%;
        gap: 20px;
    }

    .scroll-item h3 {
        font-size: 22px;
    }

    .content-layer p {
        font-size: 15px;
        line-height: 1.5;
    }

    /* 英文版移动端额外适配 */
    html[lang="en"] .hero-anchor {
        min-height: 65vh;
        padding-top: 70px;
    }

    html[lang="en"] .hero-anchor h1 {
        font-size: clamp(26px, 8vw, 44px);
    }

    html[lang="en"] .hero-anchor > p:nth-of-type(2) {
        font-size: 13px;
        max-width: 95%;
    }

    html[lang="en"] .scroll-item h3 {
        font-size: 20px;
    }

    html[lang="en"] .content-layer p {
        font-size: 14px;
    }

    .shelf {
        gap: 20px;
        padding: 20px 4% 80px;
    }

    .shelf-card {
        flex: 0 0 300px;
    }

    .shelf-img {
        height: 200px;
    }

    .shelf-info {
        padding: 24px;
    }

    .shelf-info h3 {
        font-size: 22px;
    }

    .shelf-info p {
        font-size: 14px;
    }

    .partner-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 15px;
        padding: 0 4% 60px;
    }

    .partner-grid img {
        height: 60px;
    }

    .case-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 4% 80px;
    }

    .case-tile {
        height: 350px;
        border-radius: 28px;
    }

    .canvas-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        padding: 30px 0;
        margin: 40px 0 60px;
    }

    .stat-item b {
        font-size: 28px;
    }

    .article-section {
        gap: 40px;
        margin-bottom: 80px;
    }

    .text-wrap h3 {
        font-size: 28px;
        margin-bottom: 20px;
    }

    .text-wrap p {
        font-size: 16px;
    }

    footer {
        padding: 60px 4% 40px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .brand-info {
        justify-content: center;
    }

    .contact-link {
        font-size: 18px;
    }

    .copyright {
        margin-top: 60px;
        font-size: 11px;
    }

    /* Hero 按钮移动端适配 */
    .hero-cta {
        margin-top: 24px;
        gap: 12px;
    }

    .cta-primary,
    .cta-secondary {
        padding: 12px 24px;
        font-size: 14px;
    }

    /* 优势项移动端适配 */
    .advantage-items {
        grid-template-columns: 1fr;
        gap: 16px;
        margin-top: 16px;
    }

    .advantage-item {
        padding: 16px;
    }

    .advantage-item h4 {
        font-size: 16px;
    }

    .section-subtitle {
        font-size: 14px;
        margin-top: 12px;
    }

    /* 英文版手机端额外适配 */
    html[lang="en"] .hero-cta {
        margin-top: 16px;
        gap: 10px;
    }

    html[lang="en"] .cta-primary,
    html[lang="en"] .cta-secondary {
        padding: 10px 20px;
        font-size: 13px;
    }

    html[lang="en"] .advantage-item h4 {
        font-size: 15px;
    }

    html[lang="en"] .advantage-item p {
        font-size: 13px !important;
        line-height: 1.4;
    }

    html[lang="en"] .advantage-items {
        gap: 12px;
        margin-top: 12px;
    }

    html[lang="en"] .advantage-item {
        padding: 14px;
    }

    html[lang="en"] .section-subtitle {
        font-size: 13px;
    }
}

/* 手机设备 */
@media (max-width: 480px) {
    header {
        height: 56px;
        justify-content: space-between;
    }

    .logo-box {
        height: 36px;
    }

    .logo-text {
        font-size: 15px;
    }

    .menu-toggle {
        width: 40px;
        height: 40px;
    }

    .mobile-nav {
        top: 56px;
    }

    .hero-anchor {
        height: auto;
        min-height: 100vh;
        padding: 70px 4% 30px;
    }

    .hero-anchor > p:first-child {
        font-size: 10px;
        letter-spacing: 0.3px;
    }

    .hero-anchor h1 {
        font-size: clamp(24px, 10vw, 40px);
        margin: 12px 0;
    }

    .hero-anchor > p:nth-of-type(2) {
        font-size: 13px;
        line-height: 1.4;
    }

    /* 英文版手机端额外适配 */
    html[lang="en"] .hero-anchor {
        min-height: 100vh;
        padding-top: 60px;
    }

    html[lang="en"] .hero-anchor > p:first-child {
        font-size: 9px;
    }

    html[lang="en"] .hero-anchor h1 {
        font-size: clamp(22px, 9vw, 36px);
    }

    html[lang="en"] .hero-anchor > p:nth-of-type(2) {
        font-size: 12px;
    }

    html[lang="en"] .scroll-item {
        padding: 20px 4%;
    }

    html[lang="en"] .scroll-item h3 {
        font-size: 18px;
    }

    html[lang="en"] .content-layer p {
        font-size: 13px;
        line-height: 1.45;
    }

    html[lang="en"] .advantage-item h4 {
        font-size: 14px;
    }

    html[lang="en"] .advantage-item p {
        font-size: 12px !important;
        line-height: 1.35;
    }

    html[lang="en"] .advantage-items {
        gap: 10px;
        margin-top: 10px;
    }

    html[lang="en"] .advantage-item {
        padding: 12px;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .apple-card {
        width: 95%;
        border-radius: 24px;
    }

    .scroll-item {
        padding: 24px 4%;
        gap: 20px;
    }

    .scroll-item h3 {
        font-size: 20px;
        margin-bottom: 12px;
    }

    .content-layer p {
        font-size: 14px;
    }

    .shelf-card {
        flex: 0 0 260px;
    }

    .shelf-img {
        height: 170px;
    }

    .shelf-info h3 {
        font-size: 18px;
    }

    .shelf-info p {
        font-size: 13px;
    }

    .partner-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .partner-grid img {
        height: 50px;
        padding: 6px;
    }

    .case-tile {
        height: 280px;
        border-radius: 20px;
    }

    .case-overlay {
        padding: 24px;
    }

    .canvas-stats {
        grid-template-columns: 1fr 1fr;
        gap: 15px;
        padding: 20px 0;
    }

    .stat-item b {
        font-size: 24px;
    }

    .article-section {
        margin-bottom: 60px;
    }

    .img-wrap {
        border-radius: 24px;
    }

    .text-wrap h3 {
        font-size: 24px;
    }

    .text-wrap p {
        font-size: 15px;
    }

    .canvas-body {
        padding: 60px 4% 100px;
    }

    .hero-title-box {
        bottom: 40px;
        left: 4%;
    }

    .hero-title-box h1 {
        font-size: 32px;
    }

    .hero-title-box p {
        font-size: 16px;
    }

    footer {
        padding: 40px 4% 30px;
    }

    .copyright {
        margin-top: 40px;
        padding-top: 20px;
    }

    /* Hero 按钮手机端适配 */
    .hero-cta {
        margin-top: 20px;
        gap: 10px;
    }

    .cta-primary,
    .cta-secondary {
        padding: 10px 20px;
        font-size: 13px;
    }

    /* 优势项手机端适配 */
    .advantage-items {
        gap: 12px;
        margin-top: 12px;
    }

    .advantage-item {
        padding: 12px;
    }

    .advantage-item h4 {
        font-size: 15px;
    }

    .advantage-item p {
        font-size: 13px !important;
    }

    .section-subtitle {
        font-size: 13px;
        margin-top: 10px;
    }
}