.content-subnav {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    justify-content: center;
    gap: 40px;
    padding: 17px 20px;
    background: rgba(255, 255, 255, .96);
    border-bottom: 1px solid #dbe6f1;
    width: 100vw;
    margin-left: calc(50% - 50vw)
}

.content-subnav a {
    color: #334155;
    font-weight: 700
}

.content-subnav a:hover {
    color: #004b92
}

.content-heading {
    max-width: 820px
}

.content-heading>p:not(.section-kicker) {
    color: #64748b
}

.content-heading.split {
    max-width: none;
    display: grid;
    grid-template-columns: 1fr .8fr;
    gap: 80px;
    align-items: end
}

.content-heading.split>p {
    margin: 0;
    color: #64748b
}

.resource-featured,
.resource-faq,
.resource-guides,
.resource-downloads,
.brand-relationship,
.about-capabilities,
.about-future {
    padding: 88px 0
}

.resource-entry-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 38px
}

.resource-entry-grid article,
.guide-grid article {
    padding: 28px;
    background: #fff;
    border: 1px solid #dbe6f1;
    border-radius: 6px
}

.resource-entry-grid img {
    width: 44px;
    height: 44px;
    object-fit: contain;
    margin-bottom: 26px
}

.resource-entry-grid iconify-icon {
    font-size: 44px;
    margin-bottom: 26px
}

.resource-entry-grid span,
.guide-grid span,
.download-list span,
.relationship-grid span {
    color: #3e8ccf;
    font-size: 12px;
    font-weight: 800
}

.resource-entry-grid h3,
.guide-grid h3 {
    font-size: 21px;
    margin-top: 14px
}

.resource-entry-grid p,
.guide-grid p {
    color: #64748b;
    font-size: 14px
}

.resource-entry-grid a,
.guide-grid a,
.download-list a {
    color: #004b92;
    font-weight: 800
}

.resource-faq {
    background: #fff;
    box-shadow: 0 0 0 100vmax #fff;
    clip-path: inset(0 -100vmax)
}

.faq-list {
    margin-top: 40px;
    border-top: 1px solid #cbd8e5
}

.faq-list details {
    border-bottom: 1px solid #cbd8e5
}

.faq-list summary {
    position: relative;
    cursor: pointer;
    list-style: none;
    padding: 22px 48px 22px 0;
    color: #011f69;
    font-size: 18px;
    font-weight: 800
}

.faq-list summary::-webkit-details-marker {
    display: none
}

.faq-list summary::after {
    content: '+';
    position: absolute;
    right: 8px;
    top: 18px;
    color: #3e8ccf;
    font-size: 26px;
    font-weight: 400
}

.faq-list details[open] summary::after {
    content: '−'
}

.faq-list details p {
    max-width: 920px;
    margin: 0;
    padding: 0 48px 22px 0;
    color: #64748b
}

.resource-process {
    display: grid;
    grid-template-columns: .8fr 1.2fr;
    gap: 82px;
    padding: 82px 0;
    background: #011f69;
    color: #fff;
    box-shadow: 0 0 0 100vmax #011f69;
    clip-path: inset(0 -100vmax)
}

.process-copy h2 {
    color: #fff
}

.process-copy>p:not(.section-kicker) {
    color: #b9cce2
}

.process-copy .button {
    margin-top: 20px
}

.resource-steps {
    list-style: none;
    margin: 0;
    padding: 0;
    border-top: 1px solid rgba(255, 255, 255, .2)
}

.resource-steps li {
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: 16px;
    padding: 17px 0;
    border-bottom: 1px solid rgba(255, 255, 255, .2)
}

.resource-steps span {
    color: #78bfff;
    font-weight: 800
}

.resource-steps h3 {
    color: #fff;
    font-size: 17px;
    margin: 0 0 3px
}

.resource-steps p {
    color: #b9cce2;
    font-size: 13px;
    margin: 0
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 38px
}

.resource-downloads {
    background: #eef4fa;
    box-shadow: 0 0 0 100vmax #eef4fa;
    clip-path: inset(0 -100vmax)
}

.download-list {
    margin-top: 38px;
    border-top: 1px solid #cbd8e5
}

.download-list article {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    padding: 22px 0;
    border-bottom: 1px solid #cbd8e5
}

.download-list h3 {
    font-size: 20px;
    margin: 5px 0
}

.download-list p {
    margin: 0;
    color: #64748b;
    font-size: 14px
}

.download-list a {
    flex: 0 0 auto
}

.about-intro {
    display: grid;
    grid-template-columns: 1fr .9fr;
    gap: 80px;
    padding: 90px 0;
    align-items: center
}

.about-story>p:not(.section-kicker) {
    color: #64748b;
    font-size: 17px
}

.about-brand-visual {
    position: relative;
    min-height: 410px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: #eef4fa;
    border-radius: 6px
}

.endorsed-logo {
    position: relative;
    z-index: 2;
    width: min(76%, 420px);
    height: auto
}

.about-mesh {
    position: absolute;
    width: 110%;
    height: 110%;
    object-fit: contain;
    opacity: .35
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    background: #011f69;
    color: #fff;
    box-shadow: 0 0 0 100vmax #011f69;
    clip-path: inset(0 -100vmax);
    padding: 52px 0 34px
}

.about-stats > div {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 8px 16px;
    border-right: 1px solid rgba(255, 255, 255, .2)
}

.about-stats > div > iconify-icon {
    font-size: 48px;
    color: #3e8ccf;
    flex: 0 0 auto
}

.about-stats > div > div {
    flex: 1 1 auto;
    min-width: 0
}

.about-stats div:last-of-type {
    border-right: 0
}

.about-stats strong {
    display: block;
    color: #fff;
    font-size: 28px;
    line-height: 1.1
}

.about-stats span {
    display: block;
    color: #b9cce2;
    font-size: 13px;
    margin-top: 4px
}

.about-stats>p {
    grid-column: 1/-1;
    margin: 25px 24px 0;
    color: #8fa9c7;
    font-size: 12px
}

.relationship-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    margin-top: 40px;
    border-top: 1px solid #cbd8e5;
    border-left: 1px solid #cbd8e5
}

.relationship-grid article {
    padding: 28px;
    border-right: 1px solid #cbd8e5;
    border-bottom: 1px solid #cbd8e5
}

.relationship-grid h3 {
    font-size: 20px;
    margin-top: 24px
}

.relationship-grid p {
    color: #64748b;
    font-size: 14px
}

.about-capabilities {
    background: #fff;
    box-shadow: 0 0 0 100vmax #fff;
    clip-path: inset(0 -100vmax)
}

.about-capability-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 38px
}

.about-capability-grid article {
    padding: 26px;
    border-top: 3px solid #3e8ccf;
    background: #f8fafc
}

.about-capability-grid img {
    width: 42px;
    height: 42px;
    object-fit: contain
}

.about-capability-grid iconify-icon {
    font-size: 42px
}

.about-capability-grid h3 {
    font-size: 19px;
    margin-top: 24px
}

.about-capability-grid p {
    color: #64748b;
    font-size: 14px;
    margin-bottom: 0
}

.brand-standard {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    padding: 100px 0;
    background: #004b92;
    color: #fff;
    box-shadow: 0 0 0 100vmax #004b92;
    clip-path: inset(0 -100vmax)
}

.brand-standard blockquote {
    margin: 18px 0 0;
    color: #fff;
    font-size: 34px;
    font-weight: 800;
    line-height: 1.25
}

.brand-standard>p {
    color: #d8e9f8;
    font-size: 17px
}

.about-future {
    display: grid;
    grid-template-columns: .85fr 1.15fr;
    gap: 80px
}

.about-future>div:last-child p {
    color: #64748b
}

.about-future>div:last-child p:first-child {
    margin-top: 0
}

@media(max-width:1050px) {

    .content-heading.split,
    .resource-process,
    .about-intro,
    .brand-standard,
    .about-future {
        grid-template-columns: 1fr;
        gap: 34px
    }

    .resource-entry-grid,
    .guide-grid,
    .relationship-grid {
        grid-template-columns: 1fr 1fr
    }

    .about-capability-grid {
        grid-template-columns: 1fr 1fr
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr)
    }

    .about-stats div:nth-child(3n) {
        border-right: 0
    }

    .about-stats div:nth-child(-n+3) {
        border-bottom: 1px solid rgba(255, 255, 255, .2)
    }

    .content-subnav {
        justify-content: flex-start;
        overflow-x: auto;
        white-space: nowrap
    }
}

@media(max-width:720px) {
    .content-subnav {
        gap: 24px
    }

    .resource-featured,
    .resource-faq,
    .resource-guides,
    .resource-downloads,
    .brand-relationship,
    .about-capabilities,
    .about-future {
        padding: 64px 0
    }

    .resource-entry-grid,
    .guide-grid,
    .relationship-grid,
    .about-capability-grid,
    .about-stats {
        grid-template-columns: 1fr
    }

    .relationship-grid {
        border-left: 0
    }

    .relationship-grid article {
        border-left: 1px solid #cbd8e5
    }

    .about-stats div,
    .about-stats div:nth-child(2) {
        border-right: 0;
        border-bottom: 1px solid rgba(255, 255, 255, .2)
    }

    .about-stats div:last-of-type {
        border-bottom: 0
    }

    .resource-process {
        padding: 64px 0
    }

    .download-list article {
        align-items: flex-start
    }

    .download-list p {
        max-width: none
    }

    .about-intro {
        padding: 64px 0
    }

    .about-brand-visual {
        min-height: 280px
    }

    .brand-standard {
        padding: 60px 0
    }

    .brand-standard blockquote {
        font-size: 24px
    }

    .about-naming {
        padding: 60px 0
    }

    .naming-grid {
        grid-template-columns: 1fr
    }
}

/* ---------- 命名寓意区块 ---------- */
.about-naming {
    padding: 84px 0;
    border-top: 1px solid var(--line);
    background: #fff;
    box-shadow: 0 0 0 100vmax #fff;
    clip-path: inset(0 -100vmax)
}

.about-naming .content-heading {
    max-width: 100%
}

.about-naming .content-heading h2 {
    font-size: 32px;
    margin: 10px 0 0;
    white-space: nowrap
}

.naming-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-top: 40px
}

.naming-grid article {
    padding: 28px 26px;
    background: var(--cloud);
    border: 1px solid var(--line);
    border-radius: 8px;
    border-top: 3px solid var(--sky)
}

.naming-grid .naming-part {
    display: inline-block;
    color: var(--brand);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .04em;
    background: var(--pale);
    border: 1px solid var(--line);
    padding: 4px 12px;
    border-radius: 4px
}

.naming-grid h3 {
    font-size: 19px;
    margin: 14px 0 10px
}

.naming-grid p {
    font-size: 14px;
    color: var(--muted);
    margin: 0;
    line-height: 1.6
}

/* 第三项（CELSKY=苍穹）强调，与前两项同行（不跨整行） */
.naming-grid .naming-whole {
    background: var(--pale);
    border-top-color: var(--brand)
}

.naming-grid .naming-whole .naming-part {
    background: var(--brand);
    color: #fff;
    border-color: var(--brand)
}

.naming-grid .naming-whole p {
    color: var(--ink)
}

@media(max-width:1050px) {
    .naming-grid {
        grid-template-columns: 1fr
    }

    .about-naming .content-heading h2 {
        font-size: 28px;
        white-space: normal
    }
}