/* ==========================================================================
   About Us Page Styles
   Template: page/about-us.html
   ========================================================================== */

/* ==========================================================================
   Design Tokens / Named Constants
   ========================================================================== */
:root {
    --au-primary: #6246E8;
    --au-primary-dark: #16A34A;
    --au-primary-light: rgba(34, 197, 94, 0.1);
    --au-text-primary: #1E293B;
    --au-text-secondary: #747E91;
    --au-text-tertiary: #1E293B;
    --au-bg-light: #F7F9F8;
    --au-bg-white: #FFFFFF;
    --au-bg-green: #0B6E4F;
    --au-bg-dark: #1E293B;
    --au-border: #E2E8F0;
    --au-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --au-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --au-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --au-radius-sm: 6px;
    --au-radius-md: 12px;
    --au-radius-lg: 16px;
    --au-transition-fast: 0.2s ease;
    --au-transition-normal: 0.3s ease;
    --au-transition-slow: 0.5s ease;
    --au-container-max: 1280px;
    --au-section-padding: 60px 0;
    --au-font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* ==========================================================================
   General / Layout
   ========================================================================== */
.about-us-page {
    overflow-x: hidden;
    max-width: 100%;
    width: 100%;
    font-family: var(--au-font-base);
    color: var(--au-text-primary);
    line-height: 1.6;
}

.au-container {
    max-width: var(--au-container-max);
    width: 100%;
    margin: 0 auto;
    padding: 0 24px;
    box-sizing: border-box;
}

.au-section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--au-text-primary);
    text-align: center;
    margin-bottom: 60px; /* 标题与内容间距 60px */
    line-height: 1.3;
}

.au-section-title--light {
    color: var(--au-bg-white);
}

/* ==========================================================================
   Section 1: Banner
   参考 ourpartners.html 首屏参数
   ========================================================================== */

/* about-us 首屏：导航覆盖在 banner 之上，滚动后变白底 */
body.about-us-top-hero .header {
    background-color: transparent;
    backdrop-filter: none;
}

body.about-us-top-hero .header .menus-item-text,
body.about-us-top-hero .header .language-zh,
body.about-us-top-hero .header .header-right .iphone,
body.about-us-top-hero .header .header-right .iphone-number {
    color: #FFFFFF;
}

body.about-us-top-hero .header .menus-item-top,
body.about-us-top-hero .header .iphone-icon {
    filter: brightness(0) invert(1);
}

body.about-us-top-hero .header .header_logo-image-dark {
    display: none;
}

body.about-us-top-hero .header .header_logo-image-light {
    display: block;
}

body.about-us-top-hero .header.header-active {
    background-color: #FFFFFF;
    backdrop-filter: blur(10px);
}

body.about-us-top-hero .header.header-active .menus-item-text,
body.about-us-top-hero .header.header-active .language-zh,
body.about-us-top-hero .header.header-active .header-right .iphone,
body.about-us-top-hero .header.header-active .header-right .iphone-number {
    color: #1E293B;
}

body.about-us-top-hero .header.header-active .menus-item-top,
body.about-us-top-hero .header.header-active .iphone-icon {
    filter: none;
}

body.about-us-top-hero .header.header-active .header_logo-image-dark {
    display: block;
}

body.about-us-top-hero .header.header-active .header_logo-image-light {
    display: none;
}

.au-banner {
    background-color: rgb(26, 14, 80);
    background-image:
        url('/frontStatic/cn/image/about-us/abountustop.png'),
        linear-gradient(180deg, rgb(26, 14, 80) 0%, rgb(67, 44, 177) 40.507%, rgb(134, 115, 223) 66.996%, rgb(168, 136, 255) 100%);
    background-position: center top, center;
    background-size: cover, cover;
    background-repeat: no-repeat, no-repeat;
    height: 560px;
    margin-top: 0;
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    overflow: hidden;
}

/* 水平网格线已移除 */
.au-banner::before {
    content: none;
}

/* 垂直网格线已移除 */
.au-banner::after {
    content: none;
}

.au-banner__content {
    position: absolute;
    z-index: 3;
    left: 50%;
    top: 120px;
    transform: translateX(-50%);
    width: 360px;
    min-height: 110px;
    text-align: center;
    padding: 0;
}

.au-banner__tag {
    display: inline-block;
    background: rgba(98, 70, 232, 0.1);
    border: 1px solid #6246E8;
    color: #6246E8;
    padding: 4px 16px;
    line-height: 20px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 20px;
}

.au-banner__title {
    font-size: 56px;
    font-weight: 600;
    line-height: 68px;
    color: #FFFFFF;
    margin: 0 0 8px 0;
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
}

.au-banner__subtitle2 {
    font-size: 20px;
    line-height: 28px;
    color: #FFFFFF;
    font-weight: 400;
    margin: 0;
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    letter-spacing: 0.04em;
}

/* ==========================================================================
   Section 2: Company Introduction
   ========================================================================== */
.au-intro {
    padding: 120px 0 120px;
    background: var(--au-bg-white);
}

.au-intro__container {
    max-width: 1440px;
}

.au-intro__panel {
    width: 100%;
    min-height: 388px;
    margin: 0 auto;
    /* Figma: padding-top=60px, padding-bottom=60px (cards bottom 60px from panel edge) */
    padding: 60px 64px 60px;
    background: url('/frontStatic/cn/image/about-us/aboutus2.png') center center / 100% 100% no-repeat;
    border-radius: 8px;
    overflow: hidden;
    box-sizing: border-box;
    text-align: center;
}

.au-intro__heading {
    /* width: fit-content 使渐变仅铺在文字宽度而非整个容器宽度上，修复渐变呈现为纯色的问题 */
    display: block;
    width: fit-content;
    margin: 0 auto;
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 36px;
    font-weight: 600;
    line-height: 44px;
    letter-spacing: 0;
    /* 使用 background-image 而非 background 简写，避免简写隐式重置 background-clip */
    background-image: linear-gradient(89.78deg, #519CFF 0%, #6E30FF 48.56%, #4D50F6 99.978%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.au-intro__desc {
    /* Figma: w-[1200px], 与标题间距40px，与卡片间距40px */
    max-width: 1200px;
    margin: 40px auto 40px;
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 16px;
    font-weight: 400;
    line-height: 24px;
    letter-spacing: 0;
    color: #2A323E;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    overflow: hidden;
    text-align: left;
}

.au-intro__stats {
    display: flex;
    justify-content: center;
    /* Figma: 3 cards × 200px + 2 gaps × 40px = 680px, centered in 1312px inner width */
    gap: 40px;
}

.au-intro__stat-card {
    width: 200px;
    height: 96px;
    padding: 12px 10px;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.9);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(98, 70, 232, 0.12);
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.au-intro__stat-number {
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 40px;
    font-weight: 600;
    line-height: 48px;
    letter-spacing: 0;
    color: #6246E8;
}

.au-intro__stat-label {
    /* Figma: number center at 32px, label center at 76px within 96px card → gap=8px */
    margin-top: 8px;
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 16px;
    font-weight: 400;
    line-height: 24px;
    letter-spacing: 0;
    color: #4E5969;
    opacity: 0.8;
}

/* ==========================================================================
   Section 3: Authority Certifications
   ========================================================================== */
.au-authority {
    padding: 0 0 72px;
    background: var(--au-bg-white);
}

.au-authority__container {
    max-width: 1440px;
}

.au-authority__title {
    margin: 0 0 60px;
    text-align: center;
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 36px;
    line-height: 44px;
    font-weight: 600;
    color: #181818;
}

.au-authority__grid {
    display: grid;
    grid-template-columns: repeat(4, 302px);
    gap: 16px;
    justify-content: center;
}

.au-authority__card {
    width: 302px;
    height: 168px;
    /* Figma: Stroke #6246E8 20% Inside 1px */
    border: 1px solid rgba(98, 70, 232, 0.2);
    border-radius: 8px;
    background: #FFFFFF;
    box-sizing: border-box;
    padding: 20px 18px 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.au-authority__logo {
    width: auto;
    height: 42px;
    max-width: 170px;
    object-fit: contain;
    display: block;
    margin: 0 0 16px;
}

.au-authority__line {
    margin: 0;
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    /* Figma: font-size=18px, line-height=26px, color=#2A323E */
    font-size: 18px;
    line-height: 26px;
    font-weight: 400;
    color: #2A323E;
}

.au-authority__line + .au-authority__line {
    margin-top: 0;
}

/* ==========================================================================
   Section 3: Industry Data
   ========================================================================== */
.au-industry {
    padding: var(--au-section-padding);
    background: var(--au-bg-white);
}

.au-industry__inner {
    background: #6246E8;
    border-radius: var(--au-radius-lg);
    padding: 48px 40px;
    min-height: 398px;
    box-sizing: border-box;
}

.au-industry__title {
    font-size: 28px;
    font-weight: 700;
    color: var(--au-bg-white);
    margin-bottom: 32px;
    line-height: 1.3;
}

.au-industry__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
    gap: 40px;
    align-items: center;
    width: 100%;
}

.au-industry__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.au-industry__stat {
    text-align: left;
}

.au-industry__stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--au-bg-white);
    display: block;
    line-height: 1.2;
    white-space: nowrap;
}

.au-industry__stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.85);
    display: block;
    margin-top: 6px;
    line-height: 1.4;
}

.au-industry__carousel {
    position: relative;
    width: 100%;
    max-width: 100%;
}

.au-industry__carousel::before,
.au-industry__carousel::after {
    content: '';
    position: absolute;
    top: 0;
    height: calc(100% - 27px);
    width: 32px;
    z-index: 20;
    pointer-events: none;
}

.au-industry__carousel::before {
    left: 0;
    background: linear-gradient(to right, #6246E8 0%, rgba(98, 70, 232, 0.8) 50%, transparent 100%);
}

.au-industry__carousel::after {
    right: 0;
    background: linear-gradient(to left, #6246E8 0%, rgba(98, 70, 232, 0.8) 50%, transparent 100%);
}

.au-industry-swiper {
    width: 100%;
    overflow-x: hidden;
    overflow-y: visible;
    padding-bottom: 0;
    position: relative;
    min-height: auto;
}

.au-industry-swiper .swiper-wrapper {
    align-items: stretch;
    display: flex;
}

.au-industry-swiper .swiper-slide {
    height: auto;
    display: flex;
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

.au-industry__card {
    background: var(--au-bg-white);
    border-radius: var(--au-radius-md);
    padding: 0;
    text-align: center;
    display: flex;
    flex-direction: column;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.12);
    overflow: hidden;
    height: 100%;
    width: 100%;
    min-width: 0;
    flex: 1;
    transition: transform var(--au-transition-fast), box-shadow var(--au-transition-fast);
}

.au-industry__card:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
}

.au-industry__card-img {
    width: 100%;
    height: 111px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--au-bg-white);
    padding: 8px;
    box-sizing: border-box;
}

.au-industry__card img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.au-industry__card-text {
    font-size: 12px;
    color: var(--au-text-primary);
    line-height: 1.4;
    padding: 8px 10px;
    margin: 0;
}

.au-industry-pagination {
    text-align: center;
    position: static !important;
    width: 100%;
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0;
    height: 7px;
    margin-top: 20px;
}

.au-industry-pagination .swiper-pagination-bullet {
    background: #FFFFFF;
    opacity: 0.1;
    width: 35px;
    height: 7px;
    border-radius: 3.5px;
    margin: 0 4px;
}

.au-industry-pagination .swiper-pagination-bullet-active {
    background: #FFFFFF;
    opacity: 1;
    width: 35px;
    height: 7px;
    border-radius: 3.5px;
}

/* ==========================================================================
   Section 4: Achievements / Certificates
   ========================================================================== */
.au-achievements {
    padding: var(--au-section-padding);
    background: var(--au-bg-white);
}

.au-achievements__carousel {
    position: relative;
}

.au-cert-swiper {
    overflow: hidden;
    padding: 0;
}

.au-cert-card {
    background: transparent;
    border-radius: 0;
    padding: 0;
    text-align: center;
    box-shadow: none;
    transition: transform var(--au-transition-normal);
}

.au-cert-card:hover {
    box-shadow: none;
    transform: translateY(-4px);
}

.au-cert-card__img-wrap {
    width: 100%;
    height: 269px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    box-sizing: border-box;
}

.au-cert-card__img-wrap img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.au-cert-card__label {
    font-size: 14px;
    color: var(--au-text-secondary);
    margin-top: 12px;
    line-height: 1.4;
}

.au-cert-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 32px;
    position: relative;
}

.au-cert-nav__btn {
    display: none;
}


.au-cert-pagination {
    position: relative;
    z-index: 1;
    overflow: visible;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    white-space: nowrap;
}

.au-cert-pagination .swiper-pagination-bullet {
    background: #6246E8;
    opacity: 0.1;
    width: 35px;
    height: 7px;
    border-radius: 3.5px;
    margin: 0 4px;
}

.au-cert-pagination .swiper-pagination-bullet-active {
    background: #6246E8;
    opacity: 1;
    width: 35px;
    height: 7px;
    border-radius: 3.5px;
}

/* ==========================================================================
   Section 5: Innovation（2×2交错布局，精确尺寸）
   ========================================================================== */
.au-innovation {
    padding: var(--au-section-padding);
    background: var(--au-bg-white);
    overflow: visible;
}

.au-innovation__grid {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    width: fit-content;
    margin: 0 auto;
    overflow: visible;
    justify-content: center;
}

/* 卡片基础样式 */
.au-innovation__card {
    border-radius: 8px;
    padding: 24px 20px;
    height: 166px;
    transition: box-shadow var(--au-transition-normal), transform var(--au-transition-normal);
    display: flex;
    flex-direction: column;
    gap: 10px;
    overflow: visible;
    position: relative;
}

/* 第1行第1个：286px 白色 */
.au-innovation__card:nth-child(1) {
    width: 286px;
}

/* 第1行第2个：480px 深色 */
.au-innovation__card:nth-child(2) {
    width: 480px;
}

/* 第2行第1个：480px 白色 */
.au-innovation__card:nth-child(3) {
    width: 480px;
}

/* 第2行第2个：286px 绿色 */
.au-innovation__card:nth-child(4) {
    width: 286px;
}

/* 白色底卡片 */
.au-innovation__card--light {
    background: var(--au-bg-white);
    border: 1px solid var(--au-border);
}

.au-innovation__card--light:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    transform: translateY(-4px);
    border-color: var(--au-primary);
}

/* 深色底 #1E293B */
.au-innovation__card--dark {
    background: #1E293B;
}

.au-innovation__card--dark:hover {
    box-shadow: 0 12px 32px rgba(30, 41, 59, 0.3);
    transform: translateY(-4px);
}

/* 绿色底 #6246E8 */
.au-innovation__card--green {
    background: #6246E8;
    overflow: hidden;
}

.au-innovation__card--green:hover {
    box-shadow: 0 12px 32px rgba(98, 70, 232, 0.4);
    transform: translateY(-4px);
}

/* 绿色卡片右下角装饰圆环（88×88，#D9D9D9 30%透明度，内描边白色12px） */
.au-innovation__card--green::after {
    content: '';
    position: absolute;
    right: -16px;
    bottom: 4px;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    
    /* Figma Design: Inside stroke FFFFFF 8px, Opacity 30%，内环透明仅圆环描边可见 */
    background-color: transparent;
    border: 10px solid #FFFFFF;
    box-sizing: border-box;
    opacity: 0.3;
    
    pointer-events: none;
    z-index: 1;
}

/* 图标样式 */
.au-innovation__icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--au-radius-sm);
    flex-shrink: 0;
}

/* 白色卡片图标：绿色背景 */
.au-innovation__card--light .au-innovation__icon {
    background: rgba(98, 70, 232, 0.1);
}

.au-innovation__card--light .au-innovation__icon .iconfont {
    font-size: 18px;
    color: var(--au-primary);
}

/* 深色卡片图标：#6246E8绿色背景 */
.au-innovation__card--dark .au-innovation__icon {
    background: #6246E8;
}

.au-innovation__card--dark .au-innovation__icon .iconfont {
    font-size: 18px;
    color: var(--au-bg-white);
}

/* 绿色卡片图标：#ECF7EE浅绿背景 */
.au-innovation__card--green .au-innovation__icon {
    background: #ECF7EE;
}

.au-innovation__card--green .au-innovation__icon .iconfont {
    font-size: 18px;
    color: #6246E8;
}

/* 标题样式 */
.au-innovation__title {
    font-size: 16px;
    font-weight: 700;
    margin: 0;
    line-height: 1.3;
}

.au-innovation__card--light .au-innovation__title {
    color: var(--au-text-primary);
}

.au-innovation__card--dark .au-innovation__title,
.au-innovation__card--green .au-innovation__title {
    color: var(--au-bg-white);
}

/* 描述文本样式 */
.au-innovation__desc {
    font-size: 12px;
    line-height: 1.6;
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
}

.au-innovation__card--light .au-innovation__desc {
    color: var(--au-text-secondary);
}

.au-innovation__card--dark .au-innovation__desc {
    color: rgba(255, 255, 255, 0.85);
}

.au-innovation__card--green .au-innovation__desc {
    color: rgba(255, 255, 255, 0.9);
}

/* ==========================================================================
   Section 6: National Layout
   ========================================================================== */
.au-national {
    padding: var(--au-section-padding);
    background: var(--au-bg-white);
    padding-bottom: 100px; /* 距离 Footer 100px */
}

/* 1. 去掉副标题（用户要求隐藏） */
.au-national__subtitle {
    display: none;
}

/* 2. 缩小标题和地图的间距 */
.au-national .au-section-title {
    margin-bottom: 24px;
}

.au-national__grid {
    display: flex;
    flex-direction: column;
    gap: 24px; /* 2. 缩小地图和地址的间距（从48px改为24px） */
    align-items: center;
}

.au-national__map-wrap {
    position: relative;
    width: 100%;
    max-width: 1000px;
}

.au-national__map {
    position: relative;
    width: 100%;
    aspect-ratio: 6 / 5;
    overflow: hidden;
}

/* 背景地图缩放：1.3 倍（可手动改 scale 数值，如 1.3、1.8） */
.au-national__map-bg {
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 1;
    transform: scale(1.3);
    transform-origin: center center;
}

.au-national__map-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.au-map-line {
    stroke: var(--au-primary);
    stroke-width: 1.5;
    stroke-dasharray: 6 4;
    opacity: 0.4;
    animation: au-line-flow 3s linear infinite;
    /* 隐藏绿色虚线 */
    display: none;
}

/* Map Markers */
.au-map-marker {
    position: absolute;
    transform: translate(-50%, -50%);
    cursor: pointer;
    z-index: 3;
}

.au-map-marker__dot {
    display: block;
    width: 10px;
    height: 10px;
    background: var(--au-primary);
    border-radius: 50%;
    border: 2px solid var(--au-bg-white);
    box-shadow: 0 0 6px rgba(98, 70, 232, 0.5);
    transition: transform var(--au-transition-fast);
    /* 隐藏圆点 */
    display: none;
}

.au-map-marker:hover .au-map-marker__dot {
    transform: scale(1.3);
}

.au-map-marker--primary .au-map-marker__dot {
    width: 14px;
    height: 14px;
    background: var(--au-primary-dark);
}

.au-map-marker__pulse {
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    /* #6246E8 20% 浅紫色底 */
    background: rgba(98, 70, 232, 0.30);
    animation: au-pulse 2s ease-out infinite;
    /* 隐藏脉冲动画（由JS按需开启） */
    display: none;
}

/* 节点名称：无白底，直接显示文字，轻微描边保证可读 */
.au-map-marker__label {
    position: absolute;
    left: 50%;
    top: calc(100% + 0px);
    transform: translateX(-50%);
    font-size: 12px;
    color: var(--au-text-primary);
    white-space: nowrap;
    font-weight: 500;
    opacity: 1;
    pointer-events: none;
    background: none;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
    text-shadow: 0 0 1px #fff, 0 0 2px #fff, 0 1px 2px rgba(0,0,0,0.15);
}

.au-map-marker:hover .au-map-marker__label,
.au-map-marker--primary .au-map-marker__label {
    opacity: 1;
}

/* City Cards */
.au-national__cities {
    display: grid;
    grid-template-columns: repeat(4, 1fr); /* 修正为4列布局（3行4列，共12个城市） */
    gap: 20px;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.au-national__city-card {
    background: transparent; /* 3. 卡片背景透明 */
    padding: 20px 0; /* 3. 去掉左右padding，只保留上下 */
    border: none; /* 3. 去掉边框 */
    border-bottom: 1px solid var(--au-border); /* 3. 地址下方添加分割线 */
    transition: border-bottom-color var(--au-transition-fast);
    cursor: default;
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: center;
}

.au-national__city-card:hover,
.au-national__city-card.au-active {
    border-bottom-color: var(--au-primary); /* 3. 悬停时分割线变绿色 */
}

.au-national__city-name {
    /* Figma: Microsoft YaHei Bold 24px / line-height 24px / #6246E8 */
    font-family: "Microsoft YaHei", "微软雅黑", sans-serif;
    font-size: 24px;
    font-weight: 700;
    line-height: 24px;
    color: var(--au-primary);
    margin-bottom: 0;
    text-align: center;
}

.au-national__city-info {
    /* Figma: 14px / #1E293B */
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 14px;
    line-height: 17px;
    color: #1E293B;
    margin-bottom: 0;
    text-align: center;
}

.au-national__city-address {
    /* Figma: 12px / #747E91 */
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 12px;
    color: #747E91;
    line-height: 1.6;
    margin-bottom: 0;
}

/* 联系我们按钮已移除（用户要求） */
.au-national__cta-wrap {
    display: none;
}

.au-national__cta {
    display: none;
}

.au-national__cta:hover {
    display: none;
}

.au-national__cta:focus-visible {
    display: none;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes au-pulse {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.6;
    }
    100% {
        transform: translate(-50%, -50%) scale(2.5);
        opacity: 0;
    }
}

@keyframes au-line-flow {
    0% {
        stroke-dashoffset: 0;
    }
    100% {
        stroke-dashoffset: -20;
    }
}

@keyframes au-fade-up {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Animation Classes */
.au-animate {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.au-animate.au-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Reduced Motion Preference */
@media (prefers-reduced-motion: reduce) {
    .au-map-marker__pulse,
    .au-map-line,
    .au-animate {
        animation: none;
    }

    .au-animate {
        opacity: 1;
        transform: none;
        transition: none;
    }

    .au-cert-card,
    .au-intro__value-card,
    .au-innovation__card,
    .au-national__city-card {
        transition: none;
    }
}

/* ==========================================================================
   Responsive: Tablet (max-width: 1024px)
   ========================================================================== */
@media screen and (max-width: 1024px) {
    :root {
        --au-section-padding: 60px 0;
    }

    .au-section-title {
        font-size: 28px;
        margin-bottom: 36px;
    }

    .au-banner__title {
        font-size: 40px;
    }

    .au-banner__subtitle2 {
        font-size: 15px;
    }

    .au-banner__content {
        left: 50%;
        top: 140px;
        transform: translateX(-50%);
        width: auto;
        min-height: 0;
        text-align: center;
    }

    .au-intro {
        padding: 52px 0 60px;
    }

    .au-intro__panel {
        min-height: 388px;
        padding: 34px 28px 32px;
        background-size: cover;
    }

    .au-intro__heading {
        font-size: 32px;
        line-height: 40px;
    }

    .au-intro__desc {
        margin: 20px auto 24px;
        font-size: 15px;
        line-height: 23px;
    }

    .au-intro__stats {
        gap: 16px;
        flex-wrap: wrap;
    }

    .au-authority {
        padding: 56px 0 64px;
    }

    .au-authority__title {
        font-size: 32px;
        line-height: 40px;
    }

    .au-authority__grid {
        grid-template-columns: repeat(2, 302px);
    }

    .au-industry__inner {
        padding: 36px 28px;
    }

    .au-industry__inner {
        height: auto;
    }

    .au-industry__grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .au-industry__stats {
        grid-template-columns: repeat(4, 1fr);
        gap: 16px;
    }

    .au-industry__stat-number {
        font-size: 28px;
    }

    .au-industry__stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px 24px;
    }

    .au-industry__carousel::before,
    .au-industry__carousel::after {
        width: 20px;
    }

    .au-innovation__grid {
        flex-direction: column;
        gap: 16px;
        width: 100%;
    }
    
    .au-innovation__card {
        padding: 20px;
        height: auto;
        min-height: 140px;
    }
    
    .au-innovation__card:nth-child(1),
    .au-innovation__card:nth-child(2),
    .au-innovation__card:nth-child(3),
    .au-innovation__card:nth-child(4) {
        width: 100% !important;
    }

    .au-national .au-section-title {
        margin-bottom: 20px;
    }

    .au-national__grid {
        gap: 20px;
    }

    .au-national__cities {
        grid-template-columns: repeat(3, 1fr); /* 平板端3列 */
        gap: 16px;
    }
}

/* ==========================================================================
   Responsive: Mobile (max-width: 768px)
   ========================================================================== */
@media screen and (max-width: 768px) {
    :root {
        --au-section-padding: 48px 0;
    }

    .au-container {
        padding: 0 16px;
    }

    .au-section-title {
        font-size: 24px;
        margin-bottom: 28px;
    }

    .au-banner {
        height: 240px;
    }

    .au-banner__content {
        left: 50%;
        top: 96px;
        transform: translateX(-50%);
        width: auto;
        min-height: 0;
        text-align: center;
    }

    .au-banner__title {
        font-size: 32px;
    }

    .au-banner__subtitle2 {
        font-size: 14px;
    }

    .au-intro {
        padding: 40px 0 48px;
    }

    .au-intro__panel {
        min-height: auto;
        padding: 28px 16px 24px;
        background-size: cover;
    }

    .au-intro__heading {
        font-size: 28px;
        line-height: 36px;
    }

    .au-intro__desc {
        font-size: 14px;
        line-height: 22px;
        margin: 16px auto 20px;
    }

    .au-intro__stats {
        gap: 12px;
    }

    .au-intro__stat-card {
        width: calc(50% - 6px);
        max-width: 200px;
    }

    .au-intro__stat-number {
        font-size: 34px;
        line-height: 42px;
    }

    .au-intro__stat-label {
        font-size: 14px;
        line-height: 20px;
    }

    .au-authority {
        padding: 44px 0 52px;
    }

    .au-authority__title {
        font-size: 28px;
        line-height: 36px;
        margin-bottom: 24px;
    }

    .au-authority__grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .au-authority__card {
        width: min(302px, 100%);
        margin: 0 auto;
    }

    .au-industry__inner {
        padding: 28px 20px;
        height: auto;
    }

    .au-industry__title {
        font-size: 24px;
        margin-bottom: 24px;
    }

    .au-industry__stats {
        grid-template-columns: 1fr 1fr;
        gap: 16px 24px;
    }

    .au-industry__stat-number {
        font-size: 28px;
    }

    .au-industry__stat-label {
        font-size: 13px;
    }

    .au-industry__stats {
        grid-template-columns: 1fr 1fr;
        gap: 16px 24px;
    }

    .au-industry__carousel::before,
    .au-industry__carousel::after {
        width: 20px;
    }

    .au-cert-card__img-wrap {
        height: 160px;
    }

    .au-innovation__grid {
        width: 100%;
    }
    
    .au-innovation__card {
        padding: 18px 16px;
        height: auto;
        min-height: 130px;
    }
    
    .au-innovation__icon {
        width: 32px;
        height: 32px;
    }
    
    .au-innovation__icon .iconfont {
        font-size: 16px;
    }
    
    .au-innovation__title {
        font-size: 14px;
    }
    
    .au-innovation__desc {
        font-size: 11px;
        -webkit-line-clamp: 4;
    }
    
    .au-innovation__card--green::after {
        width: 52px;
        height: 52px;
        right: -12px;
        bottom: 2px;
    }

    .au-national__subtitle {
        margin-top: -16px;
        margin-bottom: 32px;
    }

    .au-national .au-section-title {
        margin-bottom: 16px;
    }

    .au-national__grid {
        gap: 16px;
    }

    .au-national__cities {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
}

/* ==========================================================================
   Responsive: Small Mobile (max-width: 480px)
   ========================================================================== */
@media screen and (max-width: 480px) {
    .au-intro__panel {
        padding: 24px 12px 20px;
    }

    .au-intro__heading {
        font-size: 24px;
        line-height: 32px;
    }

    .au-intro__stats {
        flex-direction: column;
        align-items: center;
    }

    .au-intro__stat-card {
        width: 200px;
    }

    .au-authority__title {
        font-size: 24px;
        line-height: 32px;
    }

    .au-authority__card {
        height: 158px;
        padding: 16px 12px 12px;
    }

    .au-authority__logo {
        height: 36px;
        margin-bottom: 12px;
    }

    .au-authority__line {
        font-size: 14px;
        line-height: 22px;
    }

    .au-banner__content {
        left: 50%;
        top: 90px;
        transform: translateX(-50%);
        width: auto;
        min-height: 0;
        text-align: center;
    }

    .au-banner__title {
        font-size: 28px;
    }

    .au-banner__subtitle2 {
        font-size: 13px;
    }

    .au-intro__heading {
        font-size: 24px;
    }

    .au-national .au-section-title {
        margin-bottom: 12px;
    }

    .au-national__grid {
        gap: 16px;
    }

    .au-national__cities {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .au-national__city-name {
        font-size: 16px;
    }
    
    .au-national__city-info,
    .au-national__city-address {
        font-size: 11px;
    }

    .au-national__map {
        aspect-ratio: 4 / 3;
    }
}

/* ==========================================================================
   Focus Styles (Keyboard Accessibility)
   ========================================================================== */
.au-national__cta:focus-visible,
.au-cert-nav__btn:focus-visible {
    outline: 2px solid var(--au-primary);
    outline-offset: 3px;
}

a:focus-visible {
    outline: 2px solid var(--au-primary);
    outline-offset: 2px;
}