/* =================================================================
   西东智能官网 - 公共样式
   配色：白底 + 深蓝主色 + 少量亮色点缀
   字体：系统字体（无外网依赖，加载快）
   ================================================================= */

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
                 Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.65;
    color: #1a1a1a;
    background: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }

:root {
    --c-primary:        #1a1a1a;        /* 深炭黑（标题/文字主色） */
    --c-primary-light:  #666666;        /* 辅助灰（次要文字/边框） */
    --c-brand:          #FFB03B;        /* 品牌橙金（CTA按钮/强调/点缀） */
    --c-brand-dark:     #E89A20;        /* 深橙（hover态） */
    --c-brand-light:    #FFF3E0;        /* 浅橙底（标签/高亮块） */
    --c-accent:         #0EA5E9;        /* 点缀：科技蓝（少量使用） */
    --c-accent-warm:    #ff6b35;        /* 极少使用的暖色 */
    --c-bg:             #ffffff;
    --c-bg-soft:        #f8f8f8;        /* 浅灰底（偏暖） */
    --c-bg-dark:        #0f0f0f;        /* 深色块：深炭黑（非橙色） */
    --c-border:         #e6e6e6;
    --c-text:           #1a1a1a;
    --c-text-light:     #5a5a5a;
    --c-text-muted:     #8a8a8a;
    --maxw:             1200px;
    --pad-x:            24px;
    --radius:           8px;
    --radius-lg:        12px;
    --shadow-sm:        0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md:        0 8px 24px rgba(0, 0, 0, 0.08);
}

/* ----- 容器 ----- */
.container {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 var(--pad-x);
}

/* =================================================================
   HEADER / NAV — Apple 官网风格
   ================================================================= */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    background: rgba(22, 22, 23, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 100;
    transition: background .25s;
}
.header.scrolled {
    background: rgba(22, 22, 23, 0.92);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
    gap: 20px;
    max-width: 1200px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.logo-img {
    height: 32px;
    width: 32px;
    border-radius: 50%;
    object-fit: cover;
}
.logo-text {
    color: #fff;
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 0.02em;
    white-space: nowrap;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Helvetica Neue", sans-serif;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    gap: 44px;
}
.nav a {
    color: rgba(255, 255, 255, 0.85);
    font-size: 13px;
    font-weight: 400;
    letter-spacing: -0.01em;
    position: relative;
    white-space: nowrap;
    padding: 8px 0;
    transition: color .2s;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Helvetica Neue", sans-serif;
}
.nav a:hover { color: #fff; }
.nav a.active { color: #fff; }
.nav-item.active > a { color: #fff; }

.lang-switch {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
    font-size: 13px;
}
.lang-switch a {
    color: rgba(255, 255, 255, 0.6);
    padding: 4px 10px;
    border-radius: 4px;
    transition: all .2s;
    font-weight: 400;
}
.lang-switch a.active,
.lang-switch a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}
.menu-toggle span {
    display: block;
    width: 18px;
    height: 1.5px;
    background: rgba(255, 255, 255, 0.85);
    border-radius: 2px;
    transition: all .25s;
}

/* =================================================================
   BUTTONS
   ================================================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius);
    transition: all .2s;
    cursor: pointer;
    border: 1px solid transparent;
    white-space: nowrap;
}
.btn-primary {
    background: var(--c-brand);
    color: #fff;
}
.btn-primary:hover {
    background: var(--c-brand-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}
.btn-outline {
    background: transparent;
    color: var(--c-brand);
    border-color: var(--c-brand);
}
.btn-outline:hover {
    background: var(--c-brand);
    color: #fff;
}
.btn-ghost {
    background: transparent;
    color: var(--c-brand);
    padding: 8px 0;
}
.btn-ghost:hover { color: var(--c-brand-dark); }

/* =================================================================
   HERO (首页大标题)
   ================================================================= */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(180deg, #f8f8f8 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}
.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 64px;
    align-items: center;
}
.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(10, 37, 64, 0.06);
    color: var(--c-primary);
    border-radius: 100px;
    font-size: 0.82rem;
    font-weight: 500;
    margin-bottom: 24px;
}
.hero-eyebrow .dot {
    width: 6px; height: 6px;
    background: var(--c-accent);
    border-radius: 50%;
}
.hero h1 {
    font-size: clamp(2.2rem, 4.2vw, 3.4rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--c-primary);
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}
.hero h1 .accent { color: #fff; }
.hero p.lead {
    font-size: 1.1rem;
    color: var(--c-text-light);
    margin-bottom: 36px;
    max-width: 540px;
}
.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    padding-top: 32px;
    border-top: 1px solid var(--c-border);
    max-width: 540px;
}
.hero-stat .num {
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--c-primary);
    line-height: 1;
    margin-bottom: 6px;
}
.hero-stat .label {
    font-size: 0.85rem;
    color: var(--c-text-light);
}

.hero-visual {
    position: relative;
    aspect-ratio: 4 / 3;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.hero-visual .img-tag {
    position: absolute;
    bottom: 12px; right: 12px;
    background: rgba(255, 255, 255, 0.92);
    color: var(--c-text-muted);
    padding: 4px 10px;
    font-size: 0.75rem;
    border-radius: 4px;
    backdrop-filter: blur(6px);
}

/* =================================================================
   SECTIONS
   ================================================================= */
.section {
    padding: 96px 0;
}
.section-sm {
    padding: 64px 0;
}
.section-bg-soft {
    background: var(--c-bg-soft);
}
.section-bg-dark {
    background: var(--c-bg-dark);
    color: #fff;
}
.section-bg-dark h2,
.section-bg-dark h3 { color: #fff; }
.section-bg-dark .eyebrow { color: var(--c-accent); }
.section-bg-dark .lead { color: rgba(255,255,255,0.8); }

.section-header {
    text-align: center;
    margin-bottom: 56px;
}
.section-header.left {
    text-align: left;
}
.eyebrow {
    display: inline-block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--c-primary-light);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}
.section-header h2 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}
.section-header p {
    font-size: 1.05rem;
    color: var(--c-text-light);
    max-width: 640px;
    margin: 0 auto;
}

/* =================================================================
   PRODUCT CARDS
   ================================================================= */
.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.product-card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all .25s;
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
}
.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}
.product-card .arrow-link {
    margin-top: 16px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--c-primary-light);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.product-card:hover .arrow-link { gap: 10px; transition: gap .25s; }
.product-visual {
    position: relative;
    height: 240px; /* fallback：旧版浏览器不支持 aspect-ratio 时也有高度 */
    aspect-ratio: 4 / 3;
    background: linear-gradient(135deg, #eef2f7 0%, #dde4ee 100%);
    overflow: hidden;
}
@supports (aspect-ratio: 4 / 3) {
    .product-visual { height: auto; }
}
.product-visual svg { width: 100%; height: 100%; display: block; }
.product-visual img { display: block; width: 100%; height: 100%; object-fit: cover; }
.product-visual .img-tag {
    position: absolute;
    top: 12px; left: 12px;
    background: rgba(255,255,255,0.92);
    color: var(--c-text-muted);
    padding: 4px 10px;
    font-size: 0.72rem;
    border-radius: 4px;
}
.product-status {
    position: absolute;
    top: 12px; right: 12px;
    padding: 4px 10px;
    font-size: 0.72rem;
    border-radius: 100px;
    font-weight: 500;
}
.status-dev {
    background: rgba(0, 0, 0, 0.06);
    color: #555;
}
.status-plan {
    background: rgba(0, 0, 0, 0.04);
    color: #777;
}
.status-tbd {
    background: rgba(138, 147, 163, 0.18);
    color: var(--c-text-muted);
}

.product-info {
    padding: 28px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.product-info .cat {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--c-primary-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 10px;
}
.product-info h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--c-primary);
    margin-bottom: 12px;
}
.product-info .desc {
    color: var(--c-text-light);
    font-size: 0.92rem;
    margin-bottom: 16px;
    flex: 1;
}
.product-info .meta {
    font-size: 0.82rem;
    color: var(--c-text-muted);
    padding-top: 12px;
    border-top: 1px solid var(--c-border);
    display: flex;
    flex-wrap: wrap;
    gap: 6px 12px;
}
.product-info .meta strong {
    color: var(--c-text);
    font-weight: 500;
}

/* =================================================================
   FEATURE / STAT LIST
   ================================================================= */
.feature-list {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.feature-item {
    padding: 24px;
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--c-border);
}
.feature-item .num {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 8px;
}
.feature-item h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--c-primary);
    margin-bottom: 6px;
}
.feature-item p {
    font-size: 0.85rem;
    color: var(--c-text-light);
    line-height: 1.5;
}

/* =================================================================
   APPLICATION CARDS
   ================================================================= */
.app-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}
.app-card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all .25s;
}
.app-card:hover {
    border-color: var(--c-primary-light);
    box-shadow: var(--shadow-md);
}
.app-card .visual {
    aspect-ratio: 16 / 9;
    height: 220px; /* fallback */
    background: linear-gradient(135deg, #eef2f7 0%, #dde4ee 100%);
    position: relative;
    overflow: hidden;
}
@supports (aspect-ratio: 16 / 9) {
    .app-card .visual { height: auto; }
}
.app-card .visual img { display: block; width: 100%; height: 100%; object-fit: cover; }
.app-card .body {
    padding: 28px;
}
.app-card .stage {
    display: inline-block;
    padding: 4px 10px;
    background: var(--c-bg-soft);
    color: var(--c-primary);
    border-radius: 4px;
    font-size: 0.78rem;
    font-weight: 500;
    margin-bottom: 12px;
}
.app-card h3 {
    font-size: 1.15rem;
    color: var(--c-primary);
    margin-bottom: 10px;
}
.app-card p {
    color: var(--c-text-light);
    font-size: 0.92rem;
    margin-bottom: 14px;
}
.app-card .products {
    font-size: 0.85rem;
    color: var(--c-text-muted);
    border-top: 1px solid var(--c-border);
    padding-top: 12px;
}
.app-card .products strong {
    color: var(--c-primary);
}

/* =================================================================
   PLACEHOLDER CALLOUT - 待补充
   ================================================================= */
.tbd-banner {
    background: #fff8e6;
    border: 1px dashed #d4a73a;
    border-radius: var(--radius);
    padding: 14px 18px;
    color: #8a5a00;
    font-size: 0.88rem;
    margin: 24px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}
.tbd-banner::before {
    content: '!';
    flex-shrink: 0;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: #d4a73a;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
}

/* =================================================================
   CONTACT PAGE
   ================================================================= */
.contact-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 56px;
    align-items: start;
}
.contact-list {
    display: flex;
    flex-direction: column;
    gap: 28px;
}
.contact-item {
    display: flex;
    gap: 16px;
    padding: 20px 0;
    border-bottom: 1px solid var(--c-border);
}
.contact-item:last-child { border-bottom: none; }
.contact-icon {
    flex-shrink: 0;
    width: 44px; height: 44px;
    background: var(--c-bg-soft);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-primary);
}
.contact-icon svg { width: 22px; height: 22px; }
.contact-item .info h4 {
    font-size: 0.95rem;
    color: var(--c-primary);
    margin-bottom: 6px;
    font-weight: 600;
}
.contact-item .info p {
    color: var(--c-text-light);
    font-size: 0.92rem;
    line-height: 1.6;
}
.contact-item .info .tbd {
    color: var(--c-text-muted);
    font-style: italic;
}
.contact-form {
    background: var(--c-bg-soft);
    border-radius: var(--radius-lg);
    padding: 36px;
}
.contact-form h3 {
    font-size: 1.2rem;
    color: var(--c-primary);
    margin-bottom: 8px;
}
.contact-form p.form-note {
    color: var(--c-text-light);
    font-size: 0.85rem;
    margin-bottom: 24px;
}
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--c-text);
    font-weight: 500;
    margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    background: #fff;
    font: inherit;
    color: var(--c-text);
    transition: border-color .2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--c-primary-light);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.form-msg {
    background: #f0fbf7;
    border: 1px solid #b8e6d4;
    color: #008876;
    padding: 14px 18px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    margin-top: 12px;
    display: none;
}
.form-msg.show { display: block; }
.form-msg.error {
    background: #fef3f0;
    border: 1px solid #f5c4b3;
    color: #c44a1f;
}

/* =================================================================
   PAGE HEADER (内页顶部)
   ================================================================= */
.page-hero {
    padding: 100px 0 50px;
    background: linear-gradient(180deg, #f8f8f8 0%, #ffffff 100%);
    text-align: center;
}
.page-hero .eyebrow { color: var(--c-primary-light); }
.page-hero h1 {
    font-size: clamp(2rem, 3.6vw, 2.8rem);
    color: var(--c-primary);
    margin-bottom: 16px;
    font-weight: 700;
    letter-spacing: -0.01em;
}
.page-hero p {
    font-size: 1.05rem;
    color: var(--c-text-light);
    max-width: 640px;
    margin: 0 auto;
}

/* =================================================================
   CTA SECTION
   ================================================================= */
.cta-section {
    background: var(--c-bg-dark);
    color: #fff;
    text-align: center;
    padding: 80px 0;
}
.cta-section h2 {
    font-size: clamp(1.6rem, 2.6vw, 2.1rem);
    margin-bottom: 16px;
    color: #fff;
}
.cta-section p {
    color: rgba(255,255,255,0.75);
    font-size: 1.02rem;
    max-width: 540px;
    margin: 0 auto 32px;
}
.cta-section .btn-primary {
    background: #fff;
    color: var(--c-brand);
}
.cta-section .btn-primary:hover {
    background: var(--c-brand);
    color: #fff;
}

/* =================================================================
   FOOTER
   ================================================================= */
.footer {
    background: var(--c-bg-dark);
    color: rgba(255,255,255,0.7);
    padding: 64px 0 24px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}
.footer-brand h3 {
    color: #fff;
    font-size: 1.05rem;
    margin-bottom: 12px;
    font-weight: 600;
}
.footer-brand p {
    font-size: 0.88rem;
    line-height: 1.7;
    margin-bottom: 16px;
    color: rgba(255,255,255,0.6);
}
.footer h4 {
    color: #fff;
    font-size: 0.92rem;
    margin-bottom: 16px;
    font-weight: 600;
}
.footer ul li {
    margin-bottom: 10px;
    font-size: 0.88rem;
}
.footer ul li a {
    color: rgba(255,255,255,0.6);
    transition: color .2s;
}
.footer ul li a:hover {
    color: #fff;
}
.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.12);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.82rem;
    color: rgba(255,255,255,0.5);
}

/* =================================================================
   UTILITIES
   ================================================================= */
.divider {
    height: 1px;
    background: var(--c-border);
    margin: 48px 0;
}
.text-muted { color: var(--c-text-light); }
.text-center { text-align: center; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }

/* =================================================================
   RESPONSIVE
   ================================================================= */
@media (max-width: 1024px) {
    .hero-grid { grid-template-columns: 1fr; gap: 48px; }
    .hero-visual { order: -1; max-width: 600px; margin: 0 auto; width: 100%; }
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-list { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; gap: 32px; }
    .app-grid { grid-template-columns: 1fr; }
}

@media (max-width: 992px) {
    .section { padding: 64px 0; }
    .section-sm { padding: 48px 0; }
    .hero { padding: 100px 0 48px; }
    .hero-stats { grid-template-columns: 1fr 1fr; }

    .header-inner {
        justify-content: space-between;
    }
    .nav {
        position: fixed;
        top: var(--mobile-header-height, 48px);
        left: 0;
        right: 0;
        bottom: auto;
        height: calc(100dvh - var(--mobile-header-height, 48px));
        max-height: calc(100dvh - var(--mobile-header-height, 48px));
        background: rgba(22, 22, 23, 0.98);
        backdrop-filter: saturate(180%) blur(20px);
        -webkit-backdrop-filter: saturate(180%) blur(20px);
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 8px 0 calc(32px + env(safe-area-inset-bottom));
        overflow-y: auto;
        overflow-x: hidden;
        overscroll-behavior: contain;
        -webkit-overflow-scrolling: touch;
        scrollbar-gutter: stable;
        transform: translateX(100%);
        transition: transform .3s ease;
    }
    .nav.open {
        transform: translateX(0);
    }
    .nav a {
        padding: 16px 32px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        font-size: 16px;
        font-weight: 400;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .nav a::after {
        content: '›';
        font-size: 20px;
        color: rgba(255, 255, 255, 0.4);
        font-weight: 300;
    }
    .nav a.active::after {
        content: '';
    }
    .lang-switch {
        border-left: none;
        padding-left: 32px;
        margin-left: 0;
        padding-top: 20px;
        margin-top: 16px;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        justify-content: flex-start;
    }
    .menu-toggle { display: flex; }
    body.nav-open { overflow: hidden; touch-action: none; }
    .menu-toggle span:nth-child(1) { transform: translateY(0); }
    .menu-toggle span:nth-child(2) { opacity: 1; }
    .menu-toggle span:nth-child(3) { transform: translateY(0); }
    .nav.open ~ .menu-toggle span:nth-child(1),
    .header.menu-open .menu-toggle span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
    .nav.open ~ .menu-toggle span:nth-child(2),
    .header.menu-open .menu-toggle span:nth-child(2) { opacity: 0; }
    .nav.open ~ .menu-toggle span:nth-child(3),
    .header.menu-open .menu-toggle span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

    .products-grid { grid-template-columns: 1fr; }
    .feature-list { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .form-row { grid-template-columns: 1fr; gap: 0; margin-bottom: 0; }
    .form-group { margin-bottom: 16px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .page-hero { padding: 80px 0 32px; }
    .contact-form { padding: 24px; }
    .hero-actions .btn { flex: 1; }
}

/* 手机横屏、分屏等低高度窗口：压缩导航项，让更多内容一次可见。 */
@media (max-width: 992px) and (max-height: 500px) {
    .nav { padding-top: 0; }
    .nav a { padding-top: 10px; padding-bottom: 10px; }
    .dropdown-menu a { padding-top: 8px; padding-bottom: 8px; }
    .mega-column h3 { padding-top: 9px; }
    .lang-switch { padding-top: 10px; margin-top: 8px; }
}

/* =================================================================
   FADE IN (轻微入场动画，不影响阅读)
   ================================================================= */
.fade-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity .6s ease, transform .6s ease;
}
.fade-up.in {
    opacity: 1;
    transform: translateY(0);
}
/* =================================================================
   CONTACT PAGE v2（参考 AgileX 联系我们布局）
   ================================================================= */
.cv2-hero {
    position: relative;
    padding: 120px 0 40px;
    background:
        radial-gradient(ellipse at 85% 20%, rgba(30, 77, 183, 0.08), transparent 60%),
        linear-gradient(180deg, #fbf9f4 0%, #ffffff 100%);
    overflow: hidden;
}
.cv2-hero-inner {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    align-items: center;
    gap: 24px;
    min-height: 360px;
}
.cv2-eyebrow {
    display: inline-block;
    font-family: Georgia, "Times New Roman", serif;
    font-style: italic;
    font-size: 1.25rem;
    color: #c0392b;
    margin-bottom: 28px;
}
.cv2-hero-text h1 {
    font-size: clamp(2.6rem, 5.5vw, 4.2rem);
    font-weight: 800;
    color: #1a1a1a;
    letter-spacing: 0.02em;
    line-height: 1.1;
}
.cv2-hero-art {
    display: flex;
    justify-content: center;
    align-items: center;
}
.cv2-hero-art svg {
    width: 100%;
    max-width: 460px;
    height: auto;
}

.cv2-body {
    background: #f2f3f5;
    padding: 40px 0 96px;
}
.cv2-section-title {
    text-align: center;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 700;
    color: #1a1a1a;
    margin: 24px 0 48px;
}
.cv2-grid {
    display: grid;
    grid-template-columns: 1.05fr 1.15fr;
    gap: 28px;
    align-items: stretch;
}

.cv2-info-card {
    background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
    color: #fff;
    border-radius: 16px;
    padding: 44px 40px;
    box-shadow: 0 12px 32px rgba(10, 37, 64, 0.18);
}
.cv2-info-card h3 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 10px;
}
.cv2-info-sub {
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.92rem;
    margin-bottom: 36px;
}
.cv2-info-block { margin-bottom: 28px; }
.cv2-info-label {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 600;
    margin-bottom: 10px;
    font-size: 1rem;
}
.cv2-info-label svg {
    width: 20px;
    height: 20px;
    stroke: rgba(255, 255, 255, 0.85);
}
.cv2-info-line {
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.98rem;
    line-height: 1.9;
    padding-left: 30px;
}
.cv2-info-line a {
    color: #fff;
    text-decoration: none;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.4);
}
.cv2-info-line a:hover { border-bottom-style: solid; }
.cv2-info-line .tbd {
    color: rgba(255, 255, 255, 0.55);
    font-style: italic;
}

.cv2-form-card {
    background: #fff;
    border-radius: 16px;
    padding: 44px 40px;
    box-shadow: 0 8px 28px rgba(15, 23, 42, 0.06);
}
.cv2-form-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 28px;
}
.cv2-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    margin-bottom: 18px;
}
.cv2-row-3 {
    grid-template-columns: 1fr 1fr 1fr;
}
.cv2-field input,
.cv2-field select,
.cv2-field textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    background: #fff;
    font: inherit;
    font-size: 0.95rem;
    color: #1a1a1a;
    transition: border-color .2s, box-shadow .2s;
    appearance: none;
    -webkit-appearance: none;
}
.cv2-field select {
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path d='M1 1.5L6 6.5L11 1.5' stroke='%23888' stroke-width='1.6' fill='none' stroke-linecap='round'/></svg>");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
    color: #6b7280;
}
.cv2-field input::placeholder,
.cv2-field textarea::placeholder { color: #9ca3af; }
.cv2-field input:focus,
.cv2-field select:focus,
.cv2-field textarea:focus {
    outline: none;
    border-color: var(--c-primary-light);
    box-shadow: 0 0 0 3px rgba(30, 77, 183, 0.12);
}
.cv2-field-block { position: relative; margin-bottom: 18px; }
.cv2-field-block textarea {
    min-height: 140px;
    resize: vertical;
    padding-bottom: 32px;
}
.cv2-count {
    position: absolute;
    right: 16px;
    bottom: 12px;
    font-size: 0.8rem;
    color: #9ca3af;
}
.cv2-agree {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.88rem;
    color: #4b5563;
    margin: 6px 0 20px;
    cursor: pointer;
}
.cv2-agree input { margin-top: 3px; accent-color: var(--c-primary-light); }
.cv2-agree a { color: var(--c-primary-light); text-decoration: none; }
.cv2-submit {
    width: 100%;
    justify-content: center;
    padding: 14px 20px;
    font-size: 1rem;
}

@media (max-width: 992px) {
    .cv2-hero { padding: 100px 0 24px; }
    .cv2-hero-inner { grid-template-columns: 1fr; text-align: left; }
    .cv2-hero-art { order: -1; max-width: 320px; margin: 0 auto; }
    .cv2-grid { grid-template-columns: 1fr; gap: 20px; }
    .cv2-info-card, .cv2-form-card { padding: 28px 22px; }
}
@media (max-width: 640px) {
    .cv2-row { grid-template-columns: 1fr; gap: 14px; margin-bottom: 14px; }
    .cv2-hero-text h1 { font-size: 2.4rem; }
}

/* ===== 首页"我们做什么"预览：仅露出开头，底部渐隐，详情见关于页 ===== */
.about-preview {
    position: relative;
    max-height: 7.6em;
    overflow: hidden;
}
.about-preview::after {
    content: "";
    position: absolute;
    left: 0; right: 0; bottom: 0;
    height: 2.6em;
    background: linear-gradient(to bottom, rgba(255,255,255,0), #ffffff);
    pointer-events: none;
}
@media (max-width: 768px) {
    .about-preview { max-height: 6.8em; }
}
/* =================================================================
   下拉导航：普通下拉 + “关于西东智能”横向大展开栏
   ================================================================= */
section[id] { scroll-margin-top: 64px; }

.nav-item { position: relative; }
.nav-item > a { display: inline-flex; align-items: center; gap: 5px; }
.nav-item > a::after {
    content: '▾';
    font-size: 10px;
    opacity: .65;
    transition: transform .2s ease;
    line-height: 1;
}
.nav-item:hover > a::after,
.nav-item.open > a::after { transform: rotate(180deg); }

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 190px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 14px 34px rgba(0,0,0,.16);
    border: 1px solid rgba(10,37,64,.06);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity .18s ease, transform .18s ease, visibility .18s;
    z-index: 200;
}
.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -10px; left: 0; right: 0;
    height: 10px;
}
.nav-item:hover .dropdown-menu,
.nav-item:focus-within .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(4px);
}
.dropdown-menu a {
    display: block;
    padding: 10px 24px;
    color: #333 !important;
    font-size: 13px;
    white-space: nowrap;
    transition: background .15s ease, color .15s ease;
}
.dropdown-menu a:hover {
    background: #f5f7fa;
    color: var(--c-primary) !important;
}
.dropdown-menu a.active { color: var(--c-primary) !important; font-weight: 500; }

.mega-menu {
    position: fixed;
    top: 48px;
    left: 50%;
    width: min(1120px, calc(100vw - 32px));
    padding: 0;
    border-radius: 0 0 14px 14px;
    transform: translateX(-50%) translateY(8px);
}
.nav-item:hover .mega-menu,
.nav-item:focus-within .mega-menu {
    transform: translateX(-50%) translateY(0);
}
.mega-menu-grid {
    display: grid;
    grid-template-columns: 1.15fr 1fr 1.2fr 1fr 1.1fr;
    gap: 36px;
    padding: 34px 42px 38px;
}
.mega-column h3 {
    color: var(--c-primary);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
}
.mega-column a {
    padding: 9px 0;
    white-space: normal;
    border-bottom: 0;
}
.mega-column a:hover { background: transparent; }
.mega-link-label,
.mega-link-desc { display: block; }
.mega-link-label {
    color: #253247;
    font-size: 14px;
    font-weight: 500;
}
.mega-link-desc {
    color: #7a8494;
    font-size: 12px;
    line-height: 1.5;
    margin-top: 2px;
}
.mega-column a:hover .mega-link-label,
.mega-column a.active .mega-link-label { color: var(--c-primary-light); }

/* 资源中心、定制服务页面共用 */
.portal-intro {
    max-width: 720px;
    margin: 0 auto 42px;
    text-align: center;
}
.portal-intro h2 { color: var(--c-primary); margin-bottom: 12px; }
.portal-intro p { color: var(--c-text-light); }
.portal-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}
.portal-card {
    display: flex;
    flex-direction: column;
    min-height: 220px;
    padding: 30px;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.portal-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: rgba(30, 77, 183, .24);
}
.portal-card-kicker {
    color: var(--c-primary-light);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .04em;
    margin-bottom: 12px;
}
.portal-card h3 { color: var(--c-primary); font-size: 22px; margin-bottom: 10px; }
.portal-card p { color: var(--c-text-light); margin-bottom: 24px; }
.portal-card .more-link { margin-top: auto; }
.process-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 16px;
    margin-top: 36px;
}
.process-step {
    padding: 24px 18px;
    background: var(--c-bg-soft);
    border-radius: var(--radius);
    border-top: 3px solid var(--c-primary-light);
}
.process-step span { color: var(--c-primary-light); font-weight: 700; font-size: 13px; }
.process-step h3 { color: var(--c-primary); font-size: 17px; margin: 9px 0 6px; }
.process-step p { color: var(--c-text-light); font-size: 14px; }
.faq-list { max-width: 820px; margin: 34px auto 0; }
.faq-item { padding: 22px 0; border-bottom: 1px solid var(--c-border); }
.faq-item h3 { color: var(--c-primary); font-size: 17px; margin-bottom: 8px; }
.faq-item p { color: var(--c-text-light); }

/* 移动端（<=992px）：点击展开/收起（手风琴式） */
@media (max-width: 992px) {
    .nav-item { width: 100%; }
    .nav-item > a::after { content: '›'; font-size: 20px; opacity: .4; transform: none; }
    .nav-item:hover > a::after { transform: none; }
    .nav-item.open > a::after { transform: rotate(90deg); }
    .dropdown-menu {
        position: static;
        transform: none;
        min-width: 0;
        background: rgba(255,255,255,.05);
        border: none;
        border-radius: 0;
        box-shadow: none;
        padding: 0;
        max-height: 0;
        overflow: hidden;
        opacity: 1;
        visibility: visible;
        transition: max-height .3s ease;
    }
    .nav-item.open .dropdown-menu { max-height: 400px; }
    .dropdown-menu a {
        color: rgba(255,255,255,.72) !important;
        padding: 12px 32px 12px 48px;
        font-size: 15px;
        border-bottom: 1px solid rgba(255,255,255,.06);
    }
    .dropdown-menu a:hover { color: #fff !important; background: rgba(255,255,255,.06); }
    .dropdown-menu a.active { color: #fff !important; }
    .mega-menu {
        position: static;
        width: auto;
        transform: none;
        border-radius: 0;
    }
    .nav-item:hover .mega-menu,
    .nav-item:focus-within .mega-menu { transform: none; }
    .nav-item.open .mega-menu { max-height: 900px; }
    .mega-menu-grid { display: block; padding: 0; }
    .mega-column h3 {
        color: rgba(255,255,255,.92);
        font-size: 13px;
        padding: 14px 32px 4px 48px;
        margin: 0;
    }
    .mega-column a { padding-left: 60px; }
    .mega-link-label { color: rgba(255,255,255,.76); font-size: 15px; }
    .mega-link-desc { display: none; }
    .portal-grid { grid-template-columns: 1fr; }
    .process-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
    .process-grid { grid-template-columns: 1fr; }
    .portal-card { min-height: 0; padding: 24px; }
}

/* =================================================================
   应用案例墙（参考松灵 AgileX 首页：左大右小网格，图上压字）
   ================================================================= */
.cases-section { background: #f8f8f8; }
.cases-grid {
    display: grid;
    grid-template-columns: 1.35fr 1fr 1fr;
    grid-auto-rows: 220px;
    gap: 16px;
    margin-top: 40px;
}
.case-card {
    position: relative;
    border-radius: 14px;
    overflow: hidden;
    display: block;
    text-decoration: none;
    color: #fff;
    box-shadow: 0 2px 12px rgba(10,37,64,0.08);
    transition: transform .3s ease, box-shadow .3s ease;
}
.case-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(10,37,64,0.16);
}
.case-card.case-lg { grid-row: span 2; }
.case-bg {
    position: absolute; inset: 0;
    background-size: cover;
    background-position: center;
    transition: transform .5s ease;
}
.case-card:hover .case-bg { transform: scale(1.05); }
.case-card::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0) 40%, rgba(0,0,0,0.45) 100%);
}
.case-label {
    position: absolute;
    left: 24px; bottom: 20px;
    z-index: 2;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.case-card.case-lg .case-label { font-size: 1.9rem; }
.case-sub {
    position: absolute;
    left: 24px; bottom: 56px;
    z-index: 2;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.85);
    letter-spacing: 0.5px;
}
@media (max-width: 900px) {
    .cases-grid { grid-template-columns: 1fr 1fr; grid-auto-rows: 180px; }
    .case-card.case-lg { grid-column: span 2; }
}
@media (max-width: 560px) {
    .cases-grid { grid-template-columns: 1fr; grid-auto-rows: 200px; }
    .case-card.case-lg { grid-column: span 1; }
}

/* ===== Hero 轮播（全宽大图） ===== */
.hero-carousel {
    position: relative;
    height: 520px;
    overflow: hidden;
    margin-top: 0;
}
.hero-slides {
    position: absolute;
    inset: 0;
}
.hero-slide {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 0.8s ease;
    display: flex;
    align-items: center;
}
.hero-slide.active {
    opacity: 1;
    z-index: 1;
}
.hero-slide-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg,
        rgba(8, 25, 45, 0.92) 0%,
        rgba(8, 25, 45, 0.72) 45%,
        rgba(8, 25, 45, 0.3) 100%);
}
.hero-slide .container {
    position: relative;
    z-index: 2;
}
.hero-slide-content {
    max-width: 620px;
    color: #fff;
}
.hero-badge {
    display: inline-block;
    padding: 8px 18px;
    background: var(--c-accent);
    color: #fff;
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 24px;
    letter-spacing: 0.02em;
}
.hero-slide-content h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin-bottom: 16px;
    color: #fff;
    line-height: 1.2;
    letter-spacing: -0.02em;
}
.hero-slide-content p {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 32px;
    line-height: 1.7;
}
.hero-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.35);
    background: rgba(0,0,0,0.25);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, border-color 0.2s;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    padding: 0;
}
.hero-arrow svg {
    display: block;
    margin: auto;
    flex-shrink: 0;
}
.hero-arrow:hover {
    background: rgba(255,255,255,0.18);
    border-color: rgba(255,255,255,0.7);
}
.hero-arrow.prev { left: 24px; }
.hero-arrow.next { right: 24px; }
.hero-dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 5;
    display: flex;
    gap: 10px;
}
.hero-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    padding: 0;
}
.hero-dots .dot.active {
    background: #fff;
    width: 28px;
    border-radius: 5px;
}

@media (max-width: 992px) {
    .hero-carousel { height: 440px; }
}
@media (max-width: 640px) {
    .hero-carousel { height: 400px; }
    .hero-slide-content h2 { font-size: 1.7rem; }
    .hero-slide-content p { font-size: 0.95rem; }
    .hero-arrow { width: 40px; height: 40px; }
    .hero-arrow svg { width: 16px; height: 16px; }
    .hero-arrow.prev { left: 12px; }
    .hero-arrow.next { right: 12px; }
}

/* ===== 解决方案卡片 ===== */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.solution-card {
    display: block;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #fff;
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s, box-shadow 0.25s;
    text-decoration: none;
    color: inherit;
}
.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.solution-img {
    height: 220px;
    background-size: cover;
    background-position: center;
}
.solution-body {
    padding: 24px;
}
.solution-body h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 10px;
}
.solution-body p {
    font-size: 0.95rem;
    color: var(--c-text-light);
    line-height: 1.7;
    margin-bottom: 14px;
}
.solution-link {
    font-size: 0.9rem;
    color: var(--c-primary-light);
    font-weight: 500;
}
@media (max-width: 768px) {
    .solutions-grid { grid-template-columns: 1fr; }
    .solution-img { height: 180px; }
}

/* ===== 为什么选择我们 ===== */
.why-us {
    background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
    padding: 80px 0;
}
.why-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 44px 28px;
    max-width: 1080px;
    margin: 0 auto;
}
.why-item {
    grid-column: span 2;
    text-align: center;
    padding: 0 16px;
}
.why-item:nth-child(-n + 2) {
    grid-column: span 3;
}
.why-item h3 {
    color: #fff;
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
}
.why-item p {
    color: rgba(255,255,255,0.7);
    font-size: 0.92rem;
    line-height: 1.7;
}
@media (max-width: 768px) {
    .why-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px 20px; }
    .why-item,
    .why-item:nth-child(-n + 2) { grid-column: span 1; }
    .why-item:last-child {
        grid-column: 1 / -1;
        width: min(100%, 420px);
        justify-self: center;
    }
}
@media (max-width: 560px) {
    .why-grid { grid-template-columns: 1fr; }
    .why-item,
    .why-item:nth-child(-n + 2),
    .why-item:last-child {
        grid-column: auto;
        width: auto;
    }
    .why-us { padding: 56px 0; }
}

/* ===== 卡片轮播（解决方案/新闻） ===== */
.card-carousel {
    position: relative;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}
.card-track {
    display: flex;
    gap: 24px;
    overflow: hidden;
    scroll-behavior: smooth;
    scroll-snap-type: x mandatory;
}
.card-item {
    flex: 0 0 calc((100% - 72px) / 4);
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    text-decoration: none;
    color: inherit;
    transition: transform 0.25s, box-shadow 0.25s;
    scroll-snap-align: start;
}
.card-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}
.card-thumb {
    height: 200px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}
.card-body {
    padding: 20px;
}
.card-body h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}
.card-body p {
    font-size: 0.88rem;
    color: var(--c-text-light);
    line-height: 1.6;
    margin-bottom: 12px;
}
.card-date {
    font-size: 0.8rem;
    color: #9aa5b5;
}
.card-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: #fff;
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
    color: var(--c-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 5;
    transition: background 0.2s;
}
.card-arrow:hover {
    background: var(--c-accent);
    color: #fff;
}
.card-arrow.prev { left: 0; }
.card-arrow.next { right: 0; }
.more-link {
    color: var(--c-brand);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
}
.more-link:hover { text-decoration: underline; }

@media (max-width: 1024px) {
    .card-item { flex: 0 0 calc((100% - 48px) / 3); }
}
@media (max-width: 768px) {
    .card-item { flex: 0 0 calc((100% - 24px) / 2); }
    .card-thumb { height: 160px; }
}
@media (max-width: 560px) {
    .card-item { flex: 0 0 100%; }
    .card-arrow { display: none; }
}

/* =================================================================
   教育产品与解决方案门户
   ================================================================= */
.education-page {
    --edu-ink: #1a1a1a;
    --edu-blue: #FFB03B;
    --edu-cyan: #E89A20;
    --edu-mint: #C2740A;
    --edu-paper: #f8f8f8;
    background: #fff;
}
.education-page section[id] { scroll-margin-top: 112px; }
.edu-hero {
    position: relative;
    min-height: 650px;
    display: flex;
    align-items: stretch;
    overflow: hidden;
    background: #0f0f0f;
    color: #fff;
}
.edu-hero-bg,
.edu-hero-overlay { position: absolute; inset: 0; }
.edu-hero-bg {
    background: url('../images/cases/edu.jpg') center 58% / cover no-repeat;
    transform: scale(1.015);
}
.edu-hero-overlay {
    background:
        linear-gradient(90deg, rgba(15,15,15,.96) 0%, rgba(15,15,15,.82) 42%, rgba(15,15,15,.22) 78%, rgba(15,15,15,.08) 100%),
        linear-gradient(0deg, rgba(15,15,15,.52) 0%, transparent 48%);
}
.edu-hero-inner {
    position: relative;
    z-index: 1;
    min-height: 650px;
    padding-top: 118px;
    padding-bottom: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
}
.edu-hero-copy { width: 100%; min-width: 0; max-width: 720px; }
.edu-kicker {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: rgba(255,255,255,0.6);
    font-size: 12px;
    line-height: 1;
    letter-spacing: .18em;
    font-weight: 700;
    text-transform: uppercase;
}
.edu-kicker::before { content: ''; width: 28px; height: 2px; background: currentColor; }
.edu-kicker.dark { color: #666; }
.edu-hero h1 {
    max-width: 680px;
    margin: 24px 0 22px;
    color: #fff;
    font-size: clamp(3rem, 6vw, 5.7rem);
    line-height: 1.03;
    letter-spacing: -.055em;
    overflow-wrap: anywhere;
}
.edu-hero-copy > p {
    max-width: 690px;
    color: rgba(255,255,255,.83);
    font-size: clamp(1rem, 1.7vw, 1.22rem);
    line-height: 1.85;
    overflow-wrap: anywhere;
}
.edu-hero-actions,
.edu-inline-actions,
.edu-final-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 14px; }
.edu-hero-actions { margin-top: 34px; }
.edu-btn-light { background: #fff; color: var(--edu-ink); border: 1px solid #fff; }
.edu-btn-light:hover { background: #e9f5ff; border-color: #e9f5ff; color: var(--edu-ink); }
.edu-btn-outline { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.45); }
.edu-btn-outline:hover { background: rgba(255,255,255,.1); border-color: #fff; color: #fff; }
.edu-hero-note {
    align-self: flex-end;
    width: 340px;
    margin-bottom: 8px;
    padding: 22px 24px;
    border: 1px solid rgba(255,255,255,.24);
    background: rgba(5,20,37,.54);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.edu-hero-note span,
.edu-hero-note strong,
.edu-hero-note p { display: block; }
.edu-hero-note span { color: rgba(255,255,255,0.5); font-size: 12px; letter-spacing: .12em; }
.edu-hero-note strong { margin: 8px 0 5px; color: #fff; font-size: 15px; }
.edu-hero-note p { color: rgba(255,255,255,.65); font-size: 13px; }

.edu-site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: #fff;
    box-shadow: 0 1px 0 rgba(16,32,57,.1);
}
.edu-site-brandbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    gap: 26px;
}
.edu-site-brand { display: inline-flex; flex: 0 0 auto; align-items: center; gap: 12px; color: var(--edu-ink); }
.edu-site-brand img { width: 38px; height: 38px; border-radius: 50%; object-fit: cover; }
.edu-wordmark { display: inline-flex; align-items: baseline; gap: 0; line-height: 1; }
.edu-wordmark b {
    position: relative;
    display: inline-block;
    color: var(--edu-ink);
    font-family: "Arial Rounded MT Bold", "Avenir Next", "Trebuchet MS", sans-serif;
    font-size: 25px;
    font-weight: 800;
    font-style: normal;
    letter-spacing: -.09em;
}
.edu-wordmark b:nth-child(1) { color: #f09a2a; transform: rotate(-7deg); }
.edu-wordmark b:nth-child(2) { color: #123d6a; transform: translateY(-1px); }
.edu-wordmark b:nth-child(3) { color: #20a6a5; }
.edu-wordmark b:nth-child(4) { color: #2367d8; transform: rotate(5deg); }
.edu-wordmark b:nth-child(5) { color: #f09a2a; }
.edu-wordmark b:nth-child(6) { color: #123d6a; transform: translateY(-2px); }
.edu-wordmark b:nth-child(7) { color: #20a6a5; }
.edu-wordmark b:nth-child(8) { color: #2367d8; }
.edu-wordmark b:nth-child(9) { color: #123d6a; }
.edu-wordmark b:nth-child(7)::before { content: ''; position: absolute; width: 5px; height: 5px; left: 50%; top: -7px; border-radius: 50%; background: #f09a2a; transform: translateX(-50%); }
.edu-site-actions { display: flex; flex: 0 0 auto; align-items: center; gap: 16px; }
.edu-site-actions a { font-size: 12px; font-weight: 650; }
.edu-corporate-link { color: #617086; }
.edu-corporate-link::before { content: '←'; margin-right: 7px; }
.edu-language-link { color: var(--edu-blue); }
.edu-consult-link { padding: 9px 16px; color: #fff; background: var(--edu-blue); border-radius: 3px; }
.edu-site-actions a:hover { color: var(--edu-blue); }
.edu-site-actions .edu-consult-link:hover { color: #fff; background: #1858bd; }

.edu-subnav {
    position: static;
    flex: 1 1 auto;
    min-width: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
}
.edu-subnav-inner { display: flex; align-items: center; justify-content: center; gap: clamp(18px, 2.3vw, 34px); overflow-x: auto; scrollbar-width: none; }
.edu-subnav-inner::-webkit-scrollbar { display: none; }
.edu-subnav a { position: relative; flex: 0 0 auto; padding: 26px 0 24px; color: #425369; font-size: 13px; font-weight: 650; white-space: nowrap; }
.edu-subnav a::after { content: ''; position: absolute; left: 0; right: 100%; bottom: 0; height: 3px; background: var(--edu-blue); transition: right .22s ease; }
.edu-subnav a:hover,
.edu-subnav a.active { color: var(--edu-blue); }
.edu-subnav a:hover::after,
.edu-subnav a.active::after { right: 0; }
.education-page .edu-hero-inner { padding-top: 72px; }

.edu-section { padding: 104px 0; }
.edu-section-soft { background: var(--edu-paper); }
.edu-heading { max-width: 800px; margin: 0 auto 48px; text-align: center; }
.edu-heading h2 { margin: 18px 0 16px; color: var(--edu-ink); font-size: clamp(2rem, 4vw, 3.25rem); line-height: 1.16; letter-spacing: -.035em; }
.edu-heading p { color: #627087; font-size: 1.02rem; line-height: 1.85; }
.edu-heading-split { max-width: none; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr); align-items: end; gap: 56px; text-align: left; }
.edu-heading-split p { padding-bottom: 6px; }
.edu-heading.light h2 { color: #fff; }
.edu-heading.light p { color: rgba(255,255,255,.68); }

.edu-pathway-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid #dce3ed; border-left: 1px solid #dce3ed; }
.edu-pathway-card { position: relative; min-height: 355px; padding: 32px 28px; border-right: 1px solid #dce3ed; border-bottom: 1px solid #dce3ed; overflow: hidden; transition: background .22s ease, transform .22s ease; }
.edu-pathway-card::before { content: ''; position: absolute; top: 0; left: 0; right: 100%; height: 4px; background: #ddd; transition: right .25s ease; }
.edu-pathway-card:hover { background: #f8fbff; transform: translateY(-4px); }
.edu-pathway-card:hover::before,
.edu-pathway-card.is-current::before { right: 0; }
.edu-card-index { display: block; color: #a6b1c0; font-size: 13px; font-weight: 700; }
.edu-card-status { display: inline-block; margin: 54px 0 14px; padding: 5px 9px; color: #176e5c; background: #dff6ef; border-radius: 999px; font-size: 11px; font-weight: 700; }
.edu-card-status.secondary { color: #4f617a; background: #edf1f6; }
.edu-pathway-card h3 { margin-bottom: 14px; color: var(--edu-ink); font-size: 1.35rem; line-height: 1.35; }
.edu-pathway-card p { color: #647187; font-size: .93rem; line-height: 1.75; }
.edu-text-link { display: inline-flex; align-items: center; gap: 8px; color: var(--edu-blue); font-size: 14px; font-weight: 650; }
.edu-pathway-card .edu-text-link { position: absolute; left: 28px; bottom: 30px; }
.edu-text-link span { transition: transform .2s ease; }
.edu-text-link:hover span { transform: translateX(4px); }

.edu-filter { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 28px; }
.edu-filter button { padding: 11px 20px; border: 1px solid #d6deea; border-radius: 999px; background: #fff; color: #55647a; font: inherit; font-size: 14px; cursor: pointer; transition: .2s ease; }
.edu-filter button:hover { border-color: var(--edu-blue); color: var(--edu-blue); }
.edu-filter button.active { border-color: var(--edu-ink); background: var(--edu-ink); color: #fff; }
.edu-solution-panel { display: grid; grid-template-columns: 1fr 1.12fr; min-height: 470px; background: #fff; box-shadow: 0 18px 50px rgba(18,40,72,.09); }
.edu-solution-panel[hidden] { display: none; }
.edu-solution-copy { padding: clamp(38px, 5vw, 70px); align-self: center; }
.edu-number { color: #999; font-size: 12px; font-weight: 700; letter-spacing: .12em; }
.edu-solution-copy h3 { margin: 18px 0; color: var(--edu-ink); font-size: clamp(1.75rem, 3vw, 2.55rem); line-height: 1.22; }
.edu-solution-copy > p { color: #647187; line-height: 1.8; }
.edu-check-list { margin-top: 24px; }
.edu-check-list li { position: relative; margin-top: 10px; padding-left: 25px; color: #44536a; font-size: 14px; }
.edu-check-list li::before { content: '✓'; position: absolute; left: 0; color: var(--edu-mint); font-weight: 800; }
.edu-solution-media { min-height: 420px; background-size: cover; background-position: center; }

.edu-product-grid { display: grid; grid-template-columns: 1.12fr .88fr .88fr; gap: 22px; }
.edu-product-card { display: flex; flex-direction: column; min-height: 520px; background: #fff; border: 1px solid #e0e6ef; overflow: hidden; transition: transform .25s ease, box-shadow .25s ease; }
.edu-product-card:hover { transform: translateY(-5px); box-shadow: 0 18px 42px rgba(18,40,72,.11); }
.edu-product-image,
.edu-product-graphic { height: 275px; background-size: cover; background-position: center; }
.edu-product-featured .edu-product-image { height: 320px; }
.edu-product-graphic { position: relative; overflow: hidden; background: radial-gradient(circle at 50% 35%, #eaf8ff 0, #dfeaf5 48%, #cbd9e8 100%); }
.robot-head,
.robot-body,
.robot-wheel { position: absolute; display: block; }
.robot-head { width: 88px; height: 70px; left: calc(50% - 44px); top: 52px; border: 4px solid var(--edu-ink); border-radius: 26px; background: #fff; box-shadow: inset 0 -10px 0 #eef3f8; }
.robot-head::before,
.robot-head::after { content: ''; position: absolute; top: 25px; width: 9px; height: 9px; border-radius: 50%; background: #ccc; }
.robot-head::before { left: 22px; }
.robot-head::after { right: 22px; }
.robot-body { width: 150px; height: 86px; left: calc(50% - 75px); top: 128px; border: 4px solid var(--edu-ink); border-radius: 28px 28px 18px 18px; background: #fff; }
.robot-body::before { content: ''; position: absolute; left: 28px; right: 28px; top: 24px; height: 12px; border-radius: 6px; background: #ddd; }
.robot-wheel { width: 37px; height: 37px; top: 196px; border: 6px solid var(--edu-ink); border-radius: 50%; background: #90a3b9; }
.robot-wheel.left { left: calc(50% - 82px); }
.robot-wheel.right { right: calc(50% - 82px); }
.edu-product-body { display: flex; flex-direction: column; flex: 1; padding: 28px; }
.edu-product-body > span { color: #999; font-size: 12px; font-weight: 700; letter-spacing: .08em; }
.edu-product-body h3 { margin: 11px 0 12px; color: var(--edu-ink); font-size: 1.35rem; }
.edu-product-body p { color: #647187; font-size: .92rem; line-height: 1.75; }
.edu-product-body .edu-text-link { margin-top: auto; padding-top: 22px; }

.edu-curriculum { position: relative; background: linear-gradient(135deg, #071a31 0%, #0d3154 64%, #114f70 100%); overflow: hidden; }
.edu-curriculum::before { content: ''; position: absolute; width: 620px; height: 620px; right: -160px; top: -240px; border: 1px solid rgba(86,196,234,.2); border-radius: 50%; box-shadow: 0 0 0 90px rgba(86,196,234,.035), 0 0 0 180px rgba(86,196,234,.025); }
.edu-curriculum .container { position: relative; z-index: 1; }
.edu-curriculum-grid { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid rgba(255,255,255,.15); }
.edu-curriculum-grid article { min-height: 260px; padding: 38px; border-right: 1px solid rgba(255,255,255,.15); }
.edu-curriculum-grid article:last-child { border-right: none; }
.edu-curriculum-grid span { color: #65ccf4; font-size: 12px; font-weight: 700; letter-spacing: .13em; }
.edu-curriculum-grid h3 { margin: 58px 0 14px; color: #fff; font-size: 1.5rem; }
.edu-curriculum-grid p { color: rgba(255,255,255,.65); font-size: .93rem; line-height: 1.75; }
.edu-curriculum-footer { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 34px; color: rgba(255,255,255,.78); }

.edu-platform-layout { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: clamp(46px, 7vw, 96px); }
.edu-platform-copy h2 { margin: 18px 0; color: var(--edu-ink); font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.15; }
.edu-platform-copy > p { color: #647187; line-height: 1.85; }
.edu-platform-features { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 24px; margin: 30px 0; }
.edu-platform-features div { padding-top: 15px; border-top: 1px solid #dce3ed; }
.edu-platform-features strong,
.edu-platform-features span { display: block; }
.edu-platform-features strong { color: var(--edu-ink); font-size: 14px; }
.edu-platform-features span { margin-top: 4px; color: #7b8798; font-size: 12px; }
.edu-platform-preview { border: 1px solid #cfd9e6; border-radius: 14px; background: #fff; overflow: hidden; box-shadow: 0 28px 70px rgba(18,40,72,.16); transform: perspective(1400px) rotateY(-4deg) rotateX(1deg); }
.edu-browser-bar { display: flex; align-items: center; gap: 6px; height: 38px; padding: 0 14px; background: #eaf0f6; }
.edu-browser-bar i { width: 8px; height: 8px; border-radius: 50%; background: #a9b7c8; }
.edu-browser-bar span { margin-left: 8px; color: #718097; font-size: 10px; }
.edu-platform-screen { display: grid; grid-template-columns: 138px 1fr; min-height: 360px; }
.edu-platform-screen aside { display: flex; flex-direction: column; gap: 8px; padding: 24px 16px; background: #10233d; color: #91a3bc; font-size: 11px; }
.edu-platform-screen aside strong { margin-bottom: 22px; color: #fff; font-size: 13px; }
.edu-platform-screen aside span { padding: 9px 10px; border-radius: 5px; }
.edu-platform-screen aside span.active { color: #fff; background: #2367d8; }
.edu-platform-content { padding: 26px; background: #f6f8fb; }
.edu-platform-title { display: flex; justify-content: space-between; margin-bottom: 22px; color: var(--edu-ink); font-weight: 700; }
.edu-platform-title small { color: #999; font-weight: 600; }
.edu-mini-course { padding: 20px; margin-bottom: 14px; background: #fff; border: 1px solid #e2e7ee; box-shadow: 0 4px 12px rgba(20,43,72,.05); }
.edu-mini-course b,
.edu-mini-course span { display: block; }
.edu-mini-course b { color: var(--edu-ink); font-size: 13px; }
.edu-mini-course span { margin: 16px 0 7px; color: #8793a4; font-size: 10px; }
.edu-mini-course i { display: block; height: 5px; border-radius: 4px; background: #e6ebf1; overflow: hidden; }
.edu-mini-course em { display: block; width: 68%; height: 100%; background: #ddd; }

.edu-delivery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.edu-delivery-grid article { min-height: 235px; padding: 28px; background: #fff; border-top: 3px solid #eee; box-shadow: 0 8px 24px rgba(0,0,0,.06); }
.edu-delivery-grid span { color: #9ba8b9; font-size: 12px; font-weight: 700; }
.edu-delivery-grid h3 { margin: 52px 0 10px; color: var(--edu-ink); font-size: 1.15rem; }
.edu-delivery-grid p { color: #6d798b; font-size: .88rem; line-height: 1.7; }
.edu-service-bridge { display: flex; align-items: center; justify-content: space-between; gap: 30px; margin-top: 24px; padding: 36px 40px; background: var(--edu-ink); color: #fff; }
.edu-service-bridge span { color: #65ccf4; font-size: 12px; font-weight: 700; letter-spacing: .09em; }
.edu-service-bridge h3 { margin: 7px 0; color: #fff; font-size: 1.45rem; }
.edu-service-bridge p { color: rgba(255,255,255,.64); font-size: .9rem; }

.edu-partner-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: #dce3ed; border: 1px solid #dce3ed; }
.edu-partner-grid article, .edu-partner-grid > a.edu-partner-card { min-height: 200px; padding: 38px; background: #fff; display: block; text-decoration: none; color: inherit; transition: background .2s ease; cursor: pointer; }
.edu-partner-grid > a.edu-partner-card:hover { background: #f3f7fc; }
.edu-partner-grid h3 { margin-bottom: 12px; color: var(--edu-ink); font-size: 1.3rem; }
.edu-partner-grid p { color: #6c788b; line-height: 1.75; }
.edu-final-cta { padding: 80px 0; background: linear-gradient(110deg, #1156bc, #168bd3); color: #fff; }
.edu-final-cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 50px; }
.edu-final-cta h2 { margin: 17px 0 8px; color: #fff; font-size: clamp(2rem, 3.6vw, 3rem); }
.edu-final-cta p { color: rgba(255,255,255,.75); }
.edu-final-actions { flex: 0 0 auto; justify-content: flex-end; }

/* ---- 课程体系：学科 × 学段 ---- */
.edu-curriculum .edu-curriculum-subjects,
.edu-curriculum .edu-curriculum-stages { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.edu-curriculum .edu-curriculum-subjects { margin-bottom: 16px; }
.edu-curriculum .edu-curriculum-stages { margin-bottom: 34px; }
.edu-curriculum button {
    padding: 10px 20px; border: 1px solid rgba(255,255,255,.22); border-radius: 999px;
    background: rgba(255,255,255,.06); color: rgba(255,255,255,.74); font: inherit; font-size: 14px;
    cursor: pointer; transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.edu-curriculum button:hover { border-color: rgba(255,255,255,.5); color: #fff; }
.edu-curriculum button.active { border-color: #43b9ed; background: #43b9ed; color: #fff; }
.edu-curriculum .edu-curriculum-subjects button { font-weight: 650; }
.edu-curriculum-view {
    min-height: 300px; padding: clamp(28px, 4vw, 46px);
    background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.14); border-radius: 14px;
    transition: background .2s ease;
}
.edu-curriculum-view-head { max-width: 720px; }
.edu-curriculum-status {
    display: inline-block; padding: 5px 10px; margin-bottom: 14px;
    color: #65ccf4; background: rgba(101,204,244,.12); border-radius: 999px;
    font-size: 11px; font-weight: 700; letter-spacing: .08em;
}
.edu-curriculum-view-head h3 { margin: 0 0 10px; color: #fff; font-size: clamp(1.4rem, 2.6vw, 1.9rem); }
.edu-curriculum-view-head p { color: rgba(255,255,255,.68); line-height: 1.75; }
.edu-curriculum-points {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 28px; padding: 0; list-style: none;
}
.edu-curriculum-points li {
    position: relative; padding: 20px 20px 20px 44px; background: rgba(255,255,255,.07);
    border-radius: 10px; color: rgba(255,255,255,.86); font-size: .92rem; line-height: 1.65;
}
.edu-curriculum-points li::before {
    content: ''; position: absolute; left: 20px; top: 27px; width: 9px; height: 9px;
    border-radius: 50%; background: var(--edu-cyan); box-shadow: 0 0 0 4px rgba(34,167,232,.18);
}

/* ---- 教学平台：功能详情 ---- */
.edu-platform-detail {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 56px;
}
.edu-platform-detail article {
    padding: 26px 26px 30px; background: var(--edu-paper); border-top: 3px solid var(--edu-blue);
    box-shadow: 0 8px 24px rgba(18,40,72,.06);
}
.edu-platform-detail span { color: #999; font-size: 13px; font-weight: 750; }
.edu-platform-detail p { margin: 12px 0 0; color: #647187; font-size: .9rem; line-height: 1.75; }
.edu-btn-dark { background: var(--edu-ink); color: #fff; border: 1px solid var(--edu-ink); }
.edu-btn-dark:hover { background: #1a2f52; border-color: #1a2f52; }

/* ---- 教师发展 ---- */
.edu-teacher-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.edu-teacher-grid article {
    min-height: 210px; padding: 30px; background: #fff; border: 1px solid #e0e6ef;
    transition: transform .22s ease, box-shadow .22s ease;
}
.edu-teacher-grid article:hover { transform: translateY(-4px); box-shadow: 0 14px 34px rgba(18,40,72,.09); }
.edu-teacher-tag {
    display: inline-block; padding: 5px 10px; color: #176e5c; background: #dff6ef;
    border-radius: 999px; font-size: 11px; font-weight: 700;
}
.edu-teacher-tag.tag-planned { color: #4f617a; background: #edf1f6; }
.edu-teacher-tag.tag-custom { color: #2367d8; background: #e8f0fd; }
.edu-teacher-grid h3 { margin: 20px 0 10px; color: var(--edu-ink); font-size: 1.22rem; }
.edu-teacher-grid p { color: #647187; font-size: .9rem; line-height: 1.75; }

/* ---- 客户案例 ---- */
.edu-case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.edu-case-card {
    display: flex; flex-direction: column; background: #fff; border: 1px solid #e0e6ef; overflow: hidden;
    transition: transform .22s ease, box-shadow .22s ease;
}
.edu-case-card:hover { transform: translateY(-4px); box-shadow: 0 16px 38px rgba(18,40,72,.1); }
.edu-case-image { height: 210px; background-size: cover; background-position: center; }
.edu-case-body { display: flex; flex-direction: column; flex: 1; padding: 26px 26px 28px; }
.edu-case-body > span { color: #999; font-size: 12px; font-weight: 700; letter-spacing: .08em; }
.edu-case-body h3 { margin: 12px 0 10px; color: var(--edu-ink); font-size: 1.3rem; }
.edu-case-body p { color: #647187; font-size: .9rem; line-height: 1.7; }
.edu-case-body .edu-text-link { margin-top: auto; padding-top: 20px; }

/* ---- 常见问题 ---- */
.edu-faq-list { max-width: 860px; margin: 0 auto; }
.edu-faq-item {
    background: #fff; border: 1px solid #dde4ee; border-radius: 12px; margin-bottom: 12px;
    box-shadow: 0 4px 14px rgba(18,40,72,.04);
}
.edu-faq-item summary {
    position: relative; padding: 22px 54px 22px 26px; color: var(--edu-ink); font-size: 1.02rem;
    font-weight: 650; cursor: pointer; list-style: none;
}
.edu-faq-item summary::-webkit-details-marker { display: none; }
.edu-faq-item summary::after {
    content: '+'; position: absolute; right: 24px; top: 50%; transform: translateY(-50%);
    color: var(--edu-blue); font-size: 1.5rem; font-weight: 400; transition: transform .22s ease;
}
.edu-faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.edu-faq-item p { margin: 0; padding: 0 26px 24px; color: #647187; font-size: .94rem; line-height: 1.8; }

@media (max-width: 1100px) {
    .edu-pathway-grid { grid-template-columns: 1fr 1fr; }
    .edu-product-grid { grid-template-columns: 1fr 1fr; }
    .edu-product-featured { grid-column: span 2; display: grid; grid-template-columns: 1.1fr .9fr; min-height: 360px; }
    .edu-product-featured .edu-product-image { height: auto; }
    .edu-delivery-grid { grid-template-columns: 1fr 1fr; }
    .edu-teacher-grid,
    .edu-case-grid,
    .edu-platform-detail { grid-template-columns: 1fr 1fr; }
    .edu-curriculum-points { grid-template-columns: 1fr; }
    .edu-curriculum-points li { padding-left: 44px; }
}
@media (max-width: 820px) {
    .edu-hero,
    .edu-hero-inner { min-height: 610px; }
    .edu-hero-inner { align-items: flex-end; }
    .edu-hero-note { display: none; }
    .edu-hero-overlay { background: linear-gradient(90deg, rgba(6,22,41,.94), rgba(6,22,41,.64)), linear-gradient(0deg, rgba(6,22,41,.6), transparent); }
    .edu-heading-split { grid-template-columns: 1fr; gap: 10px; }
    .edu-solution-panel { grid-template-columns: 1fr; }
    .edu-solution-media { order: -1; min-height: 300px; }
    .edu-platform-layout { grid-template-columns: 1fr; }
    .edu-platform-preview { transform: none; }
    .edu-curriculum-grid { grid-template-columns: 1fr; }
    .edu-curriculum-grid article { min-height: 0; border-right: none; border-bottom: 1px solid rgba(255,255,255,.15); }
    .edu-curriculum-grid article:last-child { border-bottom: none; }
    .edu-curriculum-grid h3 { margin-top: 26px; }
    .edu-final-cta-inner { display: block; }
    .edu-final-actions { justify-content: flex-start; margin-top: 28px; }
}
@media (max-width: 640px) {
    .education-page section[id] { scroll-margin-top: 102px; }
    .edu-hero,
    .edu-hero-inner { min-height: 560px; }
    .edu-hero-inner { padding-top: 58px; padding-bottom: 46px; }
    .edu-hero-copy { flex: 0 0 calc(100vw - 48px); width: calc(100vw - 48px); max-width: calc(100vw - 48px); }
    .edu-hero-bg { background-position: 40% center; }
    .edu-hero h1 { max-width: 100%; font-size: clamp(2.15rem, 10.5vw, 2.65rem); word-break: break-all; }
    .edu-hero-copy > p { max-width: 100%; font-size: .96rem; line-height: 1.7; word-break: break-all; }
    .edu-hero-actions .btn { width: 100%; justify-content: center; text-align: center; }
    .edu-site-brandbar { position: relative; display: grid; grid-template-columns: 1fr auto; gap: 0 16px; min-height: 56px; padding-top: 8px; }
    .edu-site-brand img { width: 34px; height: 34px; }
    .edu-wordmark b { font-size: 22px; }
    .edu-corporate-link,
    .edu-consult-link { display: none; }
    .edu-site-actions { position: absolute; top: 10px; right: 16px; gap: 0; }
    .edu-language-link { padding: 8px; }
    .edu-subnav { grid-column: 1 / -1; grid-row: 2; width: calc(100% + 48px); margin: 8px -24px 0; border-top: 1px solid #e6ebf0; }
    .edu-subnav-inner { justify-content: flex-start; gap: 28px; padding: 0 24px; }
    .edu-subnav a { padding: 14px 0 13px; font-size: 13px; }
    .edu-section { padding: 72px 0; }
    .edu-heading { margin-bottom: 34px; text-align: left; }
    .edu-pathway-grid,
    .edu-product-grid,
    .edu-delivery-grid,
    .edu-partner-grid { grid-template-columns: 1fr; }
    .edu-pathway-card { min-height: 320px; }
    .edu-product-featured { grid-column: auto; display: flex; min-height: 520px; }
    .edu-product-featured .edu-product-image { height: 275px; }
    .edu-filter { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; }
    .edu-filter button { flex: 0 0 auto; }
    .edu-solution-copy { padding: 32px 24px; }
    .edu-solution-media { min-height: 230px; }
    .edu-platform-features { grid-template-columns: 1fr; }
    .edu-platform-screen { grid-template-columns: 92px 1fr; min-height: 300px; }
    .edu-platform-screen aside { padding: 18px 8px; }
    .edu-platform-content { padding: 16px; }
    .edu-curriculum-footer,
    .edu-service-bridge { align-items: flex-start; flex-direction: column; }
    .edu-service-bridge { padding: 28px 24px; }
    .edu-final-actions { align-items: stretch; flex-direction: column; }
    .edu-final-actions .btn { text-align: center; }
    .edu-teacher-grid,
    .edu-case-grid,
    .edu-platform-detail { grid-template-columns: 1fr; }
    .edu-curriculum-view { padding: 26px 20px; }
    .edu-curriculum-points { margin-top: 22px; }
    .edu-curriculum .edu-curriculum-subjects,
    .edu-curriculum .edu-curriculum-stages { justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; }
    .edu-curriculum button { flex: 0 0 auto; }
    .edu-faq-item summary { padding: 18px 46px 18px 20px; font-size: .96rem; }
    .edu-faq-item p { padding: 0 20px 20px; }
}

/* =================================================================
   新闻动态列表页
   ================================================================= */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}
.news-row {
    display: flex;
    gap: 28px;
    background: #fff;
    border-radius: 12px;
    padding: 28px 32px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    text-decoration: none;
    color: inherit;
    transition: transform 0.25s, box-shadow 0.25s;
}
.news-thumb {
    flex: 0 0 240px;
    height: 136px;
    border-radius: 10px;
    background-size: cover;
    background-position: center;
    overflow: hidden;
}
.news-row:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}
.news-date {
    flex: 0 0 auto;
    min-width: 96px;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--c-accent);
    padding-top: 4px;
}
.news-body h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 10px;
    line-height: 1.45;
}
.news-body p {
    font-size: 0.92rem;
    color: var(--c-text-light);
    line-height: 1.75;
    margin-bottom: 12px;
}
.news-source {
    font-size: 0.82rem;
    color: #9aa5b5;
}
@media (max-width: 560px) {
    .news-row { flex-direction: column; gap: 10px; padding: 22px 20px; }
    .news-date { min-width: 0; }
    .news-thumb { flex: 0 0 auto; width: 100%; height: 150px; }
}

/* =================================================================
   服务定制页 — 大图首屏 / 服务矩阵 / 深色流程
   ================================================================= */
.custom-service-page {
    --cs-ink: #1a1a1a;
    --cs-blue: #FFB03B;
    --cs-cyan: #E89A20;
    --cs-pale: #f8f8f8;
    background: #fff;
}
.cs-hero {
    position: relative;
    min-height: 720px;
    padding: 130px 0 88px;
    overflow: hidden;
    background:
        radial-gradient(circle at 12% 12%, rgba(33,197,199,.12), transparent 30%),
        linear-gradient(135deg, #f8fbff 0%, #fff 48%, #eef6fb 100%);
}
.cs-hero::before {
    content: '';
    position: absolute;
    width: 520px;
    height: 520px;
    right: -280px;
    top: 20px;
    border: 1px solid rgba(21,87,213,.12);
    border-radius: 50%;
    box-shadow: 0 0 0 72px rgba(21,87,213,.025), 0 0 0 144px rgba(21,87,213,.018);
}
.cs-hero-grid {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, .86fr) minmax(520px, 1.14fr);
    align-items: center;
    gap: 72px;
    z-index: 1;
}
.cs-kicker {
    display: inline-block;
    color: #999;
    font-size: 12px;
    font-weight: 750;
    letter-spacing: .15em;
    text-transform: uppercase;
}
.cs-hero-copy h1 {
    max-width: 620px;
    margin: 18px 0 24px;
    color: var(--cs-ink);
    font-size: clamp(48px, 6vw, 78px);
    line-height: 1.04;
    letter-spacing: -.045em;
}
.cs-hero-copy p {
    max-width: 570px;
    color: #52657a;
    font-size: 18px;
    line-height: 1.9;
}
.cs-hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 38px; }
.cs-hero-actions .btn { min-height: 50px; padding: 0 30px; border-radius: 3px; }
.cs-text-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--cs-blue);
    font-size: 14px;
    font-weight: 700;
}
.cs-text-link span { transition: transform .2s ease; }
.cs-text-link:hover span { transform: translateX(4px); }
.cs-hero-visual {
    position: relative;
    min-height: 500px;
    border-radius: 4px;
}
.cs-hero-visual > img {
    width: calc(100% - 54px);
    height: 465px;
    margin-left: 54px;
    object-fit: cover;
    filter: saturate(.72) contrast(1.03);
    box-shadow: 0 28px 70px rgba(9,36,61,.18);
}
.cs-hero-visual::after {
    content: '';
    position: absolute;
    inset: 0 0 35px 54px;
    background: linear-gradient(130deg, rgba(8,35,59,.02), rgba(8,35,59,.42));
    pointer-events: none;
}
.cs-hero-panel {
    position: absolute;
    left: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 300px;
    min-height: 150px;
    padding: 30px 34px;
    color: #fff;
    background: #1a1a1a;
    z-index: 2;
}
.cs-hero-panel span { margin-bottom: 12px; font-size: 10px; font-weight: 700; letter-spacing: .12em; opacity: .76; }
.cs-hero-panel strong { font-size: 26px; line-height: 1.25; letter-spacing: -.025em; }
.cs-hero-orbit {
    position: absolute;
    right: -18px;
    top: -22px;
    width: 96px;
    height: 96px;
    border: 1px solid rgba(33,197,199,.72);
    border-radius: 50%;
}
.cs-hero-orbit::before,
.cs-hero-orbit::after { content: ''; position: absolute; left: 50%; top: 50%; background: rgba(33,197,199,.68); transform: translate(-50%,-50%); }
.cs-hero-orbit::before { width: 130px; height: 1px; }
.cs-hero-orbit::after { width: 1px; height: 130px; }
.cs-hero-orbit i { position: absolute; width: 7px; height: 7px; background: var(--cs-cyan); border-radius: 50%; }
.cs-hero-orbit i:nth-child(1) { left: 10px; top: 15px; }
.cs-hero-orbit i:nth-child(2) { right: 6px; top: 42px; }
.cs-hero-orbit i:nth-child(3) { left: 40px; bottom: -4px; }

.cs-subnav {
    position: sticky;
    top: 48px;
    z-index: 50;
    border-top: 1px solid #e7edf3;
    border-bottom: 1px solid #e7edf3;
    background: rgba(255,255,255,.94);
    backdrop-filter: blur(14px);
}
.cs-subnav .container { display: flex; justify-content: center; gap: 50px; overflow-x: auto; }
.cs-subnav a { position: relative; flex: 0 0 auto; padding: 17px 0; color: #536578; font-size: 13px; font-weight: 600; }
.cs-subnav a::after { content: ''; position: absolute; left: 0; right: 100%; bottom: -1px; height: 2px; background: var(--cs-blue); transition: right .2s ease; }
.cs-subnav a:hover { color: var(--cs-blue); }
.cs-subnav a:hover::after { right: 0; }

.cs-core-section { padding: 92px 0 100px; scroll-margin-top: 102px; background: #fff; }
.cs-core-layout { display: grid; grid-template-columns: minmax(340px, .78fr) minmax(0, 1.42fr); gap: 0; align-items: stretch; }
.cs-core-intro { min-width: 0; padding: 0 54px 0 0; border-right: 1px solid #e3e8ed; }
.cs-core-label { padding: 12px 16px; border-radius: 7px; color: #666; background: #f5f5f5; font-size: 12px; font-weight: 750; }
.cs-core-title-row { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; padding: 12px 0 0; }
.cs-core-title-row h2 { color: #071d31; font-size: 31px; line-height: 1.2; letter-spacing: -.035em; }
.cs-core-title-row span { color: #8a96a2; font-size: 12px; white-space: nowrap; }
.cs-core-illustration { display: grid; place-items: center; min-height: 294px; margin: 14px 0 10px; }
.cs-core-illustration svg { width: 100%; max-height: 280px; }
.cs-core-notes { display: grid; width: 100%; gap: 8px; color: #4f5e6d; font-size: 13px; line-height: 1.65; overflow-wrap: anywhere; }
.cs-core-notes li { position: relative; padding-left: 16px; }
.cs-core-notes li::before { content: ''; position: absolute; left: 0; top: .72em; width: 5px; height: 5px; border-radius: 50%; background: #1d3347; }
.cs-core-notes strong { color: #152d42; }
.cs-tech-panel { display: flex; min-width: 0; flex-direction: column; padding-left: 54px; }
.cs-tech-panel > h2 { margin: -12px 0 20px; padding: 0 0 22px; border-bottom: 1px solid #dfe5ea; color: #071d31; font-size: 30px; text-align: center; letter-spacing: -.03em; }
.cs-tech-table { flex: 1; }
.cs-tech-row { display: grid; grid-template-columns: 185px minmax(0, 1fr); align-items: center; min-height: 112px; border-bottom: 1px solid #e3e8ed; }
.cs-tech-row h3 { color: #102c43; font-size: 15px; }
.cs-tech-items { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.cs-tech-items span { display: inline-flex; align-items: center; min-height: 38px; padding: 8px 14px; border: 1px solid #d7e1e8; border-radius: 5px; color: #536579; background: #f9fbfc; font-size: 12px; font-weight: 650; }
.cs-tech-items--text span { width: 100%; border: 0; padding-left: 0; background: transparent; font-weight: 500; }
.cs-core-cta { align-self: center; min-height: 46px; margin-top: 26px; padding: 0 28px; border-radius: 24px; color: #1a1a1a; background: #FFB03B; }
.cs-core-cta:hover { color: #fff; background: #E89A20; transform: translateY(-1px); }

.cs-section { padding: 112px 0; scroll-margin-top: 102px; }
.cs-section-head { max-width: 720px; margin: 0 auto 50px; text-align: center; }
.cs-section-head h2 { margin: 15px 0 16px; color: var(--cs-ink); font-size: clamp(32px, 4vw, 48px); line-height: 1.18; letter-spacing: -.035em; }
.cs-section-head p { color: #637286; font-size: 16px; line-height: 1.85; }

.cs-service-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; }
.cs-service-card {
    display: grid;
    grid-template-rows: 210px 1fr;
    min-height: 520px;
    overflow: hidden;
    border: 1px solid #e1e8ef;
    background: #fff;
    transition: transform .25s ease, box-shadow .25s ease;
}
.cs-service-card:hover { transform: translateY(-5px); box-shadow: 0 24px 54px rgba(9,36,61,.1); }
.cs-service-card--wide { grid-template-columns: minmax(230px, .85fr) minmax(0, 1.15fr); grid-template-rows: 1fr; min-height: 360px; }
.cs-card-visual { position: relative; overflow: hidden; background: #0b2b49; }
.cs-card-visual::before,
.cs-card-visual::after { content: ''; position: absolute; }
.cs-card-visual::before {
    width: 180px;
    height: 180px;
    right: -30px;
    top: -25px;
    border: 1px solid rgba(255,255,255,.24);
    border-radius: 50%;
    box-shadow: 0 0 0 30px rgba(255,255,255,.035), 0 0 0 60px rgba(255,255,255,.025);
}
.cs-card-visual::after { left: 12%; right: 12%; bottom: 22%; height: 1px; background: rgba(255,255,255,.34); box-shadow: 0 -38px 0 rgba(255,255,255,.1), 0 38px 0 rgba(255,255,255,.1); }
.cs-card-visual span { position: absolute; left: 28px; top: 25px; color: rgba(255,255,255,.8); font-size: 13px; font-weight: 700; letter-spacing: .12em; z-index: 1; }
.cs-card-visual--scene { background: linear-gradient(145deg, #0e5582, #08243e); }
.cs-card-visual--prototype { background: linear-gradient(145deg, #178f97, #083b52); }
.cs-card-visual--delivery { background: linear-gradient(145deg, #2a2a2a, #0f0f0f); }
.cs-card-body { display: flex; flex-direction: column; padding: 34px 36px 36px; }
.cs-card-kicker { color: #999; font-size: 11px; font-weight: 750; letter-spacing: .11em; text-transform: uppercase; }
.cs-card-body h3 { margin: 13px 0 12px; color: var(--cs-ink); font-size: 25px; line-height: 1.3; letter-spacing: -.025em; }
.cs-card-body p { margin-bottom: 28px; color: #677688; font-size: 14px; line-height: 1.8; }
.cs-card-body .cs-text-link { margin-top: auto; }

.cs-process-section { overflow: hidden; background: var(--cs-ink); }
.cs-section-head--light h2 { color: #fff; }
.cs-section-head--light p { color: rgba(255,255,255,.62); }
.cs-section-head--light .cs-kicker { color: #6cdfe0; }
.cs-process-grid { position: relative; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); }
.cs-process-grid::before { content: ''; position: absolute; left: 8%; right: 8%; top: 29px; height: 1px; background: rgba(255,255,255,.18); }
.cs-process-step { position: relative; min-height: 240px; padding: 0 24px 26px; border-right: 1px solid rgba(255,255,255,.1); color: #fff; }
.cs-process-step:last-child { border-right: 0; }
.cs-process-step > span { position: relative; display: grid; place-items: center; width: 58px; height: 58px; margin-bottom: 34px; border: 1px solid rgba(108,223,224,.65); border-radius: 50%; color: #8cf3f3; background: var(--cs-ink); font-size: 12px; font-weight: 700; z-index: 1; }
.cs-process-step h3 { margin-bottom: 12px; font-size: 19px; }
.cs-process-step p { color: rgba(255,255,255,.56); font-size: 13px; line-height: 1.75; }

.cs-cases-section { background: var(--cs-pale); }
.cs-case-placeholder {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    min-height: 330px;
    padding: 46px;
    overflow: hidden;
    color: #fff;
    background: linear-gradient(125deg, #143b60, #0b253f 55%, #126675);
}
.cs-case-placeholder::before { content: ''; position: absolute; width: 420px; height: 420px; right: -70px; top: -190px; border: 1px solid rgba(255,255,255,.18); border-radius: 50%; box-shadow: 0 0 0 55px rgba(255,255,255,.025), 0 0 0 110px rgba(255,255,255,.02); }
.cs-case-placeholder span { position: relative; font-size: 11px; font-weight: 700; letter-spacing: .15em; color: #82e9e9; }
.cs-case-placeholder strong { position: relative; margin-top: 8px; font-size: clamp(28px, 5vw, 52px); letter-spacing: -.04em; }
.cs-case-placeholder i { position: absolute; right: 50px; bottom: 48px; width: 54px; height: 54px; border: 1px solid rgba(255,255,255,.42); border-radius: 50%; }
.cs-case-placeholder i::before { content: '→'; position: absolute; inset: 0; display: grid; place-items: center; color: #fff; font-style: normal; }

.cs-inquiry { padding: 78px 0; scroll-margin-top: 102px; background: #0f0f0f; color: #fff; }
.cs-inquiry-inner { display: flex; align-items: center; justify-content: space-between; gap: 54px; }
.cs-inquiry .cs-kicker { color: rgba(255,255,255,0.5); }
.cs-inquiry h2 { margin: 10px 0 8px; font-size: clamp(30px, 4vw, 46px); letter-spacing: -.035em; }
.cs-inquiry p { max-width: 760px; color: rgba(255,255,255,.72); }
.cs-btn-light { min-height: 50px; padding: 0 30px; border-radius: 2px; color: #1a1a1a; background: #FFB03B; }
.cs-btn-light:hover { color: #fff; background: #E89A20; }

@media (max-width: 1040px) {
    .cs-hero { min-height: auto; }
    .cs-hero-grid { grid-template-columns: 1fr 1fr; gap: 42px; }
    .cs-hero-visual > img { width: calc(100% - 30px); margin-left: 30px; }
    .cs-process-grid { grid-template-columns: repeat(3, 1fr); row-gap: 42px; }
    .cs-process-grid::before { display: none; }
    .cs-process-step { min-height: 210px; }
    .cs-core-layout { grid-template-columns: minmax(300px, .8fr) minmax(0, 1.2fr); }
    .cs-core-intro { padding-right: 34px; }
    .cs-tech-panel { padding-left: 34px; }
    .cs-tech-row { grid-template-columns: 145px minmax(0, 1fr); }
}
@media (max-width: 760px) {
    .cs-hero { padding: 100px 0 58px; }
    .cs-hero-grid { grid-template-columns: 1fr; gap: 52px; }
    .cs-hero-copy h1 { font-size: 48px; }
    .cs-hero-copy p { font-size: 16px; }
    .cs-hero-visual { min-height: 390px; }
    .cs-hero-visual > img { width: calc(100% - 22px); height: 350px; margin-left: 22px; }
    .cs-hero-panel { width: 245px; min-height: 122px; padding: 24px; }
    .cs-hero-panel strong { font-size: 22px; }
    .cs-hero-orbit { right: 0; }
    .cs-subnav .container { justify-content: flex-start; gap: 30px; }
    .cs-section { padding: 78px 0; }
    .cs-service-grid { grid-template-columns: 1fr; }
    .cs-service-card,
    .cs-service-card--wide { grid-template-columns: 1fr; grid-template-rows: 180px 1fr; min-height: 470px; }
    .cs-process-grid { grid-template-columns: 1fr 1fr; }
    .cs-process-step { min-height: 190px; padding-left: 12px; }
    .cs-inquiry-inner { align-items: flex-start; flex-direction: column; }
    .cs-case-placeholder { min-height: 280px; padding: 32px 26px; }
    .cs-core-section { padding: 68px 0 74px; }
    .cs-core-layout { grid-template-columns: 1fr; gap: 64px; }
    .cs-core-intro { padding-right: 0; padding-bottom: 58px; border-right: 0; border-bottom: 1px solid #e3e8ed; }
    .cs-tech-panel { padding-left: 0; }
    .cs-tech-panel > h2 { margin-top: 0; text-align: left; }
    .cs-tech-row { grid-template-columns: 130px minmax(0, 1fr); min-height: 105px; }
}
@media (max-width: 480px) {
    .cs-hero-actions { align-items: flex-start; flex-direction: column; gap: 20px; }
    .cs-hero-copy h1 { font-size: 42px; }
    .cs-process-grid { grid-template-columns: 1fr; }
    .cs-process-step { min-height: 0; padding: 0 0 28px; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.1); }
    .cs-process-step:last-child { border-bottom: 0; }
    .cs-process-step > span { margin-bottom: 18px; }
    .cs-card-body { padding: 28px 24px 30px; }
    .cs-case-placeholder i { right: 24px; bottom: 30px; }
    .cs-core-title-row { align-items: flex-start; flex-direction: column; gap: 6px; }
    .cs-core-title-row h2 { font-size: 28px; }
    .cs-core-illustration { min-height: 230px; }
    .cs-tech-row { grid-template-columns: 1fr; align-items: start; gap: 14px; padding: 24px 0; }
}

/* ========== 教育页：基础教育"做中学"六大主题 ========== */
.edu-theme-panel { display: block; padding: clamp(32px, 4vw, 56px); }
.edu-theme-panel .edu-solution-copy { padding: 0 0 28px; }
.edu-theme-panel .edu-solution-copy h3 { margin: 14px 0 10px; font-size: clamp(1.5rem, 2.4vw, 2rem); }
.edu-theme-panel .edu-solution-copy > p { max-width: 880px; }
.edu-theme-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; margin-top: 12px; }
.edu-theme-card { position: relative; padding: 22px 20px 20px; background: #f7f9fc; border: 1px solid #e6ecf4; border-radius: 14px; transition: all .2s ease; }
.edu-theme-card:hover { background:#fff; border-color: #1a1a1a; transform: translateY(-2px); box-shadow: 0 10px 28px rgba(18,40,72,.08); }
.edu-theme-no { display: inline-block; font-size: 12px; font-weight: 800; letter-spacing: .1em; color: #9aa8bd; margin-bottom: 10px; }
.edu-theme-card h4 { margin: 0 0 8px; font-size: 1.15rem; color: #17233b; }
.edu-theme-card > p { font-size: .86rem; color: #5b6b84; line-height: 1.65; margin-bottom: 12px; }
.edu-theme-card ul { margin: 0 0 14px; padding: 0; list-style: none; }
.edu-theme-card ul li { position: relative; padding-left: 16px; font-size: .84rem; color: #38485f; line-height: 1.9; }
.edu-theme-card ul li::before { content: '·'; position: absolute; left: 4px; color: #176e5c; font-weight: 800; }
.edu-theme-tag { display: inline-block; padding: 4px 10px; font-size: .72rem; color: #176e5c; background: #dff6ef; border-radius: 999px; font-weight: 600; }
.edu-theme-cta { display: flex; align-items: center; gap: 22px; margin-top: 28px; padding-top: 22px; border-top: 1px dashed #d6deea; }
@media (max-width: 900px) {
  .edu-theme-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .edu-theme-grid { grid-template-columns: 1fr; }
  .edu-theme-cta { flex-direction: column; align-items: flex-start; gap: 12px; }
}

/* ========== 教育页：顶部导航 hover 下拉 ========== */
.edu-dropdown { position: relative; flex: 0 0 auto; }
.edu-dropdown > a { display: inline-flex; align-items: center; gap: 5px; }
.edu-caret { font-size: 10px; opacity: .7; transition: transform .2s ease; }
.edu-dropdown:hover .edu-caret { transform: rotate(180deg); }
.edu-dropdown-menu {
  position: absolute; top: 100%; left: 50%; transform: translateX(-50%) translateY(6px);
  min-width: 170px; background: #fff; border-radius: 12px;
  box-shadow: 0 14px 38px rgba(18,40,72,.16);
  padding: 8px 0; display: none; z-index: 200;
  border: 1px solid #eef2f7;
}
.edu-dropdown-menu::before {
  content: ''; position: absolute; top: -8px; left: 0; right: 0; height: 8px;
}
.edu-dropdown:hover .edu-dropdown-menu { display: block; animation: eduDrop .18s ease; }
@keyframes eduDrop { from { opacity: 0; transform: translateX(-50%) translateY(-2px); } to { opacity: 1; transform: translateX(-50%) translateY(6px); } }
.edu-dropdown-menu a {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 10px 18px !important; margin: 0;
  color: #33415a !important; font-size: 13px !important; font-weight: 500 !important;
  white-space: nowrap; border-radius: 0 !important;
}
.edu-dropdown-menu a::after { display: none !important; }
.edu-dropdown-menu a:hover { background: #f4f7fb; color: var(--edu-blue) !important; }
.edu-dropdown-menu a.disabled { color: #9aa8bd !important; cursor: not-allowed; }
.edu-dropdown-menu a.disabled:hover { background: #f4f7fb; }
.edu-dropdown-menu em {
  font-style: normal; font-size: 10px; color: #d98a1f;
  background: #fff4e0; padding: 2px 7px; border-radius: 999px; font-weight: 600;
}
@media (max-width: 900px) {
  .edu-dropdown-menu { position: static; transform: none; box-shadow: none; border: none; padding-left: 12px; }
  .edu-dropdown:hover .edu-dropdown-menu { display: block; }
}

/* 修复：subnav overflow 裁剪下拉菜单 */
@media (min-width: 901px) {
  .edu-subnav-inner { overflow: visible !important; }
}

/* edu-theme-card 作为 <a> 标签时重置 */
a.edu-theme-card { display: block; text-decoration: none; color: inherit; }
a.edu-theme-card:hover { text-decoration: none; }

/* ========== 教育 hero：产品发布风格 ========== */
.edu-hero h1 { font-weight: 400 !important; letter-spacing: -0.02em !important; line-height: 1.15 !important; }
.edu-hero-copy > p { font-weight: 400 !important; }
.edu-hero .edu-kicker { font-weight: 400 !important; letter-spacing: .15em !important; opacity: .9; }
.edu-hero-bg { background-image: url('../images/cases/edu-course.jpg') !important; background-position: center !important; }

/* ========== 教育 hero：对齐乐高比例 ========== */
.edu-hero { min-height: 640px; display: flex; align-items: flex-end; }
.edu-hero-inner { padding-bottom: 64px !important; padding-top: 120px; }
.edu-hero-copy { display: flex; flex-direction: column; gap: 24px; }
.edu-hero .edu-kicker { font-size: 16px !important; font-weight: 400 !important; letter-spacing: 0.02em !important; line-height: 1.5; margin: 0 !important; }
.edu-hero h1 {
  font-size: clamp(2.2rem, 4.2vw, 3.8rem) !important;  /* ~61px */
  font-weight: 400 !important;
  line-height: 1.15 !important;
  letter-spacing: 0 !important;
  max-width: 780px !important;
  margin: 0 !important;
}
.edu-hero-copy > p {
  font-size: clamp(0.95rem, 1.3vw, 1.125rem) !important;
  font-weight: 400 !important;
  line-height: 1.6 !important;
  max-width: 640px !important;
  margin: 0 !important;
}
.edu-hero-actions { margin-top: 8px !important; }
.edu-hero-overlay { background: linear-gradient(90deg, rgba(0,0,0,.65) 0%, rgba(0,0,0,.35) 50%, rgba(0,0,0,.1) 100%) !important; }
.edu-hero-note { display: none !important; }
@media (max-width: 900px) {
  .edu-hero { min-height: 520px; }
  .edu-hero-inner { padding-bottom: 40px !important; padding-top: 80px; }
}

/* 教育 hero：h1 放大占满宽度 */
.edu-hero h1 {
  font-size: clamp(2.6rem, 6vw, 5.5rem) !important;
  max-width: 100% !important;
  width: 100% !important;
}
.edu-hero-copy > p { max-width: 720px !important; }

/* 教育 hero：严格对齐乐高比例 */
.edu-hero { min-height: 720px; }
.edu-hero-inner { padding-left: 80px !important; padding-right: 80px !important; padding-bottom: 80px !important; justify-content: flex-start; }
.edu-hero h1 {
  font-size: clamp(2.2rem, 4vw, 3.75rem) !important;  /* ~60px */
  max-width: 900px !important;
  width: auto !important;
  line-height: 1.15 !important;
}
.edu-hero-copy > p { max-width: 780px !important; }
.edu-hero-overlay { background: linear-gradient(90deg, rgba(0,0,0,.45) 0%, rgba(0,0,0,.15) 60%, rgba(0,0,0,0) 100%) !important; }
@media (max-width: 900px) {
  .edu-hero { min-height: 560px; }
  .edu-hero-inner { padding-left: 24px !important; padding-right: 24px !important; padding-bottom: 48px !important; }
}

/* 教育 hero：kicker 放大，背景换回原机器人图 */
.edu-hero .edu-kicker { font-size: 20px !important; }
.edu-hero-bg { background-image: url('../images/cases/edu.jpg') !important; }