:root {
    --ink: #091527;
    --ink-soft: #42516a;
    --blue: #0867f2;
    --blue-dark: #0451c5;
    --blue-pale: #eaf3ff;
    --line: #dce4ef;
    --surface: #fff;
    --surface-soft: #f4f7fb;
    --safe-top: env(safe-area-inset-top, 0px);
    --header-height: calc(6.75rem + var(--safe-top));
    --radius: .75rem;
    --shadow: 0 1.25rem 3.75rem rgba(16, 45, 88, .09);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; color: var(--ink); background: var(--surface); font: 1rem/1.7 "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, a, input, select, textarea { -webkit-tap-highlight-color: transparent; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { line-height: 1.2; }

.skip-link { position: fixed; top: .5rem; left: .5rem; z-index: 100; padding: .6rem 1rem; color: #fff; background: var(--blue); border-radius: .35rem; transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
.page-shell, .nav-shell { width: min(100% - 2rem, 74rem); margin-inline: auto; }

.site-header { position: fixed; inset: 0 0 auto; z-index: 50; height: var(--header-height); padding-top: var(--safe-top); background: rgba(255,255,255,.94); border-bottom: 1px solid rgba(220,228,239,.9); backdrop-filter: blur(1rem); }
.nav-shell { height: 6.75rem; display: flex; flex-direction: column; align-items: stretch; justify-content: center; gap: .15rem; padding-block: .45rem; }
.brand { min-height: 2.4rem; display: inline-flex; align-items: center; flex: 0 0 auto; align-self: flex-start; }
.brand-logo, .footer-logo { position: relative; display: block; overflow: hidden; background: #fff; }
.brand-logo { width: 8.5rem; height: 2.55rem; }
.brand-logo img, .footer-logo img { position: absolute; top: 0; left: 0; width: 100%; height: auto; display: block; transform: translateY(-29%); }
.top-nav { min-width: 0; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); align-items: center; gap: .2rem; white-space: nowrap; }
.top-nav a { min-height: 2.55rem; display: inline-flex; align-items: center; justify-content: center; padding: .35rem .3rem; color: var(--ink-soft); border-radius: .4rem; font-size: .875rem; font-weight: 650; }
.top-nav a:hover, .top-nav a:focus-visible { color: var(--blue); background: var(--blue-pale); }
.top-nav .nav-contact { color: #fff; background: var(--blue); }

.hero, .section { scroll-margin-top: calc(var(--header-height) + 1rem); }
.hero { position: relative; min-height: 42rem; display: grid; align-items: start; overflow: hidden; padding: calc(var(--header-height) + 3rem) 0 4rem; background: linear-gradient(145deg,#fff 0%,#f8fbff 48%,#edf5ff 100%); }
.hero-grid { position: absolute; inset: 0; opacity: .48; background-image: linear-gradient(rgba(8,103,242,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(8,103,242,.06) 1px,transparent 1px); background-size: 2.5rem 2.5rem; mask-image: linear-gradient(to bottom,transparent,#000 25%,#000 75%,transparent); }
.hero-layout { position: relative; z-index: 1; display: grid; gap: 2.75rem; }
.eyebrow, .section-index { margin-bottom: 1.25rem; color: var(--blue); font-size: .78rem; font-weight: 800; letter-spacing: .15em; }
.eyebrow { white-space: nowrap; }
.hero h1 { max-width: 10em; margin-bottom: 1.35rem; font-size: clamp(2.35rem,10.5vw,5.2rem); letter-spacing: -.05em; word-break: keep-all; }
.hero-lead { margin-bottom: .8rem; font-size: clamp(1.05rem,4.6vw,1.55rem); font-weight: 650; line-height: 1.55; }
.hero-note { max-width: 37rem; margin-bottom: 2rem; color: var(--ink-soft); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; }
.button { min-height: 3rem; display: inline-flex; align-items: center; justify-content: center; padding: .7rem 1.25rem; border: 1px solid transparent; border-radius: .45rem; cursor: pointer; font-weight: 700; transition: color 180ms ease,background-color 180ms ease,border-color 180ms ease,transform 180ms ease; }
.button:hover { transform: translateY(-2px); }
.button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, a:focus-visible { outline: 3px solid rgba(8,103,242,.3); outline-offset: 3px; }
.button-primary { color: #fff; background: var(--blue); box-shadow: 0 .75rem 2rem rgba(8,103,242,.22); }
.button-primary:hover { background: var(--blue-dark); }
.button-secondary { background: #fff; border-color: var(--line); }

.hero-status { position: relative; min-height: 17rem; display: grid; align-content: end; padding: 1.25rem; overflow: hidden; background: rgba(255,255,255,.75); border: 1px solid rgba(8,103,242,.18); border-radius: 1rem; box-shadow: var(--shadow); backdrop-filter: blur(.75rem); }
.signal-orbit { position: absolute; inset: 50% auto auto 50%; width: 15rem; aspect-ratio: 1; transform: translate(-50%,-58%); }
.signal-orbit span { position: absolute; inset: 50% auto auto 50%; aspect-ratio: 1; border: 1px solid rgba(8,103,242,.3); border-radius: 50%; transform: translate(-50%,-50%); }
.signal-orbit span:nth-child(1) { width: 5rem; }
.signal-orbit span:nth-child(2) { width: 9rem; }
.signal-orbit span:nth-child(3) { width: 13rem; }
.signal-orbit i { position: absolute; top: 50%; left: 50%; width: .65rem; aspect-ratio: 1; background: var(--blue); border-radius: 50%; box-shadow: 0 0 0 .6rem rgba(8,103,242,.12); transform: translate(-50%,-50%); }
.frequency-row { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
.frequency-row div { display: flex; align-items: baseline; gap: .25rem; padding: .75rem; background: rgba(255,255,255,.94); }
.frequency-row strong { font-size: 1.6rem; line-height: 1; }
.frequency-row span, .hero-status > p { color: var(--ink-soft); font-size: .75rem; font-weight: 700; letter-spacing: .1em; }
.hero-status > p { margin: .9rem 0 0; text-align: center; }

.section { padding: 5.5rem 0; }
.section-tint { background: var(--surface-soft); }
.section-heading { display: grid; gap: .5rem; margin-bottom: 2.5rem; }
.section-index span { display: inline-block; margin-right: .25rem; font-size: 1.45rem; letter-spacing: 0; }
.section h2 { margin-bottom: 1.25rem; font-size: clamp(2rem,8vw,3.35rem); letter-spacing: -.04em; }
.section-lead { max-width: 47rem; margin-bottom: 0; color: var(--ink-soft); font-size: 1.05rem; }
.solution-showcase { display: grid; gap: 1rem; margin-bottom: 2rem; }
.solution-showcase figure, .product-gallery figure, .capability-gallery figure { margin: 0; }
.solution-scene { position: relative; min-height: 16rem; overflow: hidden; border-radius: var(--radius); background: #dce8f8; }
.solution-scene img { width: 100%; height: 100%; min-height: 16rem; display: block; object-fit: cover; }
.solution-scene figcaption { position: absolute; inset: auto 0 0; display: grid; padding: 2.75rem 1.25rem 1.2rem; color: #fff; background: linear-gradient(transparent,rgba(4,18,38,.86)); }
.solution-scene figcaption span { color: #9bc5ff; font-size: .76rem; font-weight: 800; letter-spacing: .1em; }
.solution-scene figcaption strong { font-size: 1.05rem; }
.solution-product { display: grid; grid-template-columns: minmax(6rem,.65fr) minmax(0,1.35fr); gap: 1.25rem; align-items: center; padding: 1.25rem; background: var(--blue-pale); border: 1px solid #cfe2fb; border-radius: var(--radius); }
.solution-product > img { width: 100%; height: 17rem; display: block; object-fit: contain; }
.product-code { margin-bottom: .35rem; color: var(--blue); font-size: .75rem; font-weight: 800; letter-spacing: .1em; }
.solution-product h3 { margin-bottom: 1.15rem; font-size: 1.15rem; }
.fact-list { display: grid; gap: .75rem; margin: 0; padding: 0; list-style: none; }
.fact-list li { display: grid; padding-top: .7rem; border-top: 1px solid rgba(8,103,242,.18); }
.fact-list strong { font-size: .92rem; }
.fact-list span { color: var(--ink-soft); font-size: .75rem; }
.solution-grid { display: grid; gap: .85rem; }
.capability-card { min-height: 12.25rem; padding: 1.5rem; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); transition: border-color 180ms ease,box-shadow 180ms ease,transform 180ms ease; }
.capability-card:hover { border-color: rgba(8,103,242,.45); box-shadow: var(--shadow); transform: translateY(-.2rem); }
.card-number { display: block; margin-bottom: 2.25rem; color: var(--blue); font-size: .75rem; font-weight: 800; letter-spacing: .12em; }
.capability-card h3 { margin-bottom: .6rem; font-size: 1.2rem; }
.capability-card p { margin-bottom: 0; color: var(--ink-soft); font-size: .92rem; }
.delivery-flow { display: grid; grid-template-columns: 1fr; gap: .35rem; margin-top: 2rem; padding: 1.25rem; background: var(--ink); border-radius: var(--radius); }
.delivery-flow span { padding: .45rem .7rem; color: #fff; font-size: .9rem; font-weight: 650; }
.delivery-flow i { width: 1px; height: 1.25rem; margin-left: .75rem; background: rgba(255,255,255,.35); }

.product-layout, .capability-layout { display: grid; gap: 1.5rem; }
.product-gallery, .capability-gallery { display: grid; gap: .75rem; }
.product-shot, .installed-shot, .lab-shot, .test-shot { position: relative; overflow: hidden; background: #eaf1fa; border-radius: var(--radius); }
.product-shot { min-height: 18rem; display: grid; place-items: center; padding: 1rem; }
.product-shot img { width: 100%; height: 18rem; display: block; object-fit: contain; }
.installed-shot img, .lab-shot img, .test-shot img { width: 100%; height: 100%; display: block; object-fit: cover; }
.installed-shot { aspect-ratio: 16/9; }
.lab-shot { min-height: 18rem; }
.lab-shot img { min-height: 18rem; }
.test-shot { aspect-ratio: 16/10; }
.product-gallery figcaption, .capability-gallery figcaption { position: absolute; inset: auto .65rem .65rem auto; padding: .3rem .6rem; color: #fff; background: rgba(9,21,39,.82); border-radius: .25rem; font-size: .72rem; font-weight: 650; }
.media-placeholder { position: relative; min-height: 20rem; display: grid; place-items: center; overflow: hidden; padding: 2rem; background: linear-gradient(135deg,transparent 49.7%,rgba(8,103,242,.12) 50%,transparent 50.3%),linear-gradient(45deg,#f7faff,#eaf3ff); border: 1px dashed rgba(8,103,242,.45); border-radius: var(--radius); text-align: center; }
.media-placeholder::before { content: ""; position: absolute; width: 13rem; aspect-ratio: 1; border: 1px solid rgba(8,103,242,.22); border-radius: 50%; box-shadow: 0 0 0 3rem rgba(8,103,242,.035),0 0 0 6rem rgba(8,103,242,.025); }
.media-placeholder > div { position: relative; z-index: 1; display: grid; justify-items: center; }
.placeholder-tag { margin-bottom: 1rem; padding: .25rem .6rem; color: var(--blue); background: rgba(255,255,255,.85); border: 1px solid rgba(8,103,242,.2); border-radius: 2rem; font-size: .7rem; font-weight: 800; letter-spacing: .12em; }
.media-placeholder strong { font-size: 1.25rem; }
.media-placeholder small { margin-top: .3rem; color: var(--ink-soft); font-size: .82rem; }
.placeholder-corners::before, .placeholder-corners::after { content: ""; position: absolute; width: 2.25rem; height: 2.25rem; border-color: var(--blue); border-style: solid; }
.placeholder-corners::before { top: 1rem; left: 1rem; border-width: 2px 0 0 2px; }
.placeholder-corners::after { right: 1rem; bottom: 1rem; border-width: 0 2px 2px 0; }
.proof-list { display: grid; align-content: center; }
.proof-list article { display: grid; grid-template-columns: 2.5rem 1fr; gap: .75rem; padding: 1.5rem 0; border-bottom: 1px solid var(--line); }
.proof-list article:first-child { border-top: 1px solid var(--line); }
.proof-list article > span { color: var(--blue); font-size: .75rem; font-weight: 800; }
.proof-list h3 { margin-bottom: .4rem; font-size: 1.2rem; }
.proof-list p { margin-bottom: 0; color: var(--ink-soft); font-size: .92rem; }
.product-specs { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; margin-top: 1.25rem; }
.product-specs div { min-height: 5.25rem; display: grid; align-content: center; padding: .75rem; background: #fff; border: 1px solid var(--line); border-radius: .45rem; }
.product-specs strong { color: var(--blue); font-size: 1.05rem; }
.product-specs span { color: var(--ink-soft); font-size: .75rem; }
.capability-placeholder { min-height: 22rem; background: radial-gradient(circle at center,rgba(8,103,242,.08) 0 1px,transparent 1px),linear-gradient(145deg,#f8fbff,#eaf2fd); background-size: 1.25rem 1.25rem,auto; }
.tech-stack { display: grid; grid-template-columns: 1fr 1fr; gap: .75rem; }
.tech-item { min-height: 7rem; display: flex; flex-direction: column; justify-content: space-between; padding: 1rem; background: var(--surface-soft); border-left: .18rem solid var(--blue); }
.tech-item span { color: var(--blue); font-size: .72rem; font-weight: 800; letter-spacing: .08em; }
.tech-item strong { font-size: .95rem; line-height: 1.35; }
.tech-frequency { grid-column: 1/-1; min-height: 8rem; color: #fff; background: var(--blue); border-left-color: var(--ink); }
.tech-frequency span { color: rgba(255,255,255,.72); }
.tech-frequency strong { font-size: 1.6rem; }
.pcba-showcase { margin-top: 3rem; padding-top: 2.5rem; border-top: 1px solid var(--line); }
.pcba-heading { max-width: 44rem; margin-bottom: 1.5rem; }
.pcba-heading > p { margin-bottom: .45rem; color: var(--blue); font-size: .75rem; font-weight: 800; letter-spacing: .14em; }
.pcba-heading h3 { margin-bottom: .65rem; font-size: clamp(1.55rem,6vw,2.25rem); letter-spacing: -.025em; }
.pcba-heading > span { display: block; color: var(--ink-soft); font-size: .92rem; }
.pcba-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: .65rem; }
.pcba-card { min-width: 0; margin: 0; overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.pcba-card img { width: 100%; height: 10.5rem; display: block; padding: .65rem; object-fit: contain; background: radial-gradient(circle at 50% 45%,#fff 0 20%,#f2f6fb 76%); }
.pcba-card figcaption { display: grid; gap: .1rem; min-height: 4.25rem; padding: .7rem .75rem .8rem; border-top: 1px solid var(--line); }
.pcba-card figcaption strong { font-size: .86rem; line-height: 1.35; }
.pcba-card figcaption span { color: var(--ink-soft); font-size: .72rem; line-height: 1.4; }
.pcba-featured { grid-column: 1/-1; }
.pcba-featured img { height: 13rem; }

.contact-section { color: #fff; background: var(--ink); }
.contact-layout { display: grid; gap: 2.5rem; }
.section-index-light { color: #77aefa; }
.contact-copy h2 { margin-bottom: 1.25rem; }
.contact-copy > p:not(.section-index) { max-width: 31rem; color: #b9c5d7; }
.contact-copy .company-name { margin-bottom: .2rem; color: #fff; font-size: 1.15rem; font-weight: 750; }
.contact-copy .company-name-en { margin-bottom: 1.5rem; color: #8fa1b9; font-size: .8rem; line-height: 1.45; }
.contact-details { display: grid; gap: .8rem; margin-top: 1.5rem; font-style: normal; }
.contact-details div { display: grid; grid-template-columns: 5.5rem minmax(0,1fr); gap: .65rem; padding-bottom: .8rem; border-bottom: 1px solid rgba(255,255,255,.12); }
.contact-details span { color: #8fa1b9; font-size: .82rem; }
.contact-details strong, .contact-details a { color: #fff; font-size: .9rem; font-weight: 650; overflow-wrap: anywhere; }
.contact-details a:hover { color: #77aefa; }
.wechat-card { width: min(100%,16rem); margin: 0; overflow: hidden; justify-self: start; color: var(--ink); background: #fff; border: 1px solid rgba(255,255,255,.18); border-radius: var(--radius); box-shadow: 0 1.25rem 3.5rem rgba(0,0,0,.16); }
.wechat-qr-window { aspect-ratio: 880/830; overflow: hidden; background: #fff; }
.wechat-card img { width: 100%; height: auto; display: block; transform: translateY(-21.82%); }
.wechat-card figcaption { padding: .8rem 1rem 1rem; text-align: center; border-top: 1px solid var(--line); }
.wechat-card figcaption strong { font-size: .92rem; }
.contact-prompt { display: grid; gap: .45rem; margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,.16); }
.contact-prompt span { color: #77aefa; font-size: .75rem; font-weight: 800; letter-spacing: .12em; }
.site-footer { padding: 1.5rem 0; color: #9eacc0; background: #050d19; border-top: 1px solid rgba(255,255,255,.08); font-size: .78rem; }
.site-footer .page-shell { display: flex; flex-direction: column; gap: .25rem; }
.footer-brand-row { align-items: flex-start; }
.footer-logo { width: 7.25rem; height: 2.2rem; flex: 0 0 auto; border-radius: .2rem; }
.footer-company { display: grid; gap: .05rem; }
.footer-company span:first-child { color: #fff; font-weight: 700; }
.site-footer .footer-sub { margin-top: .45rem; padding-top: .7rem; border-top: 1px solid rgba(255,255,255,.08); }
.site-footer .footer-record { margin-top: .55rem; }
.footer-record a { color: #b8c5d8; }
.footer-record a:hover { color: #fff; }

@media (min-width: 36rem) {
    :root { --header-height: calc(4.75rem + var(--safe-top)); }
    .nav-shell { height: 4.75rem; flex-direction: row; align-items: center; justify-content: space-between; gap: .75rem; padding-block: 0; }
    .brand { min-height: 0; align-self: auto; }
    .top-nav { display: flex; }
    .top-nav { gap: .35rem; }
    .top-nav a { padding-inline: .7rem; font-size: .88rem; }
    .solution-grid { grid-template-columns: repeat(2,1fr); }
    .solution-showcase { grid-template-columns: minmax(0,1.35fr) minmax(15rem,.65fr); }
    .solution-scene, .solution-scene img { min-height: 24rem; }
    .solution-product { grid-template-columns: 1fr; align-content: center; }
    .solution-product > img { height: 18rem; }
    .delivery-flow { grid-template-columns: auto 1fr auto 1fr auto 1fr auto; align-items: center; }
    .delivery-flow i { width: auto; height: 1px; margin: 0; }
    .pcba-grid { grid-template-columns: repeat(3,minmax(0,1fr)); gap: .85rem; }
    .pcba-featured { grid-column: span 2; }
    .pcba-card img { height: 14rem; }
    .pcba-featured img { height: 14rem; }
    .site-footer .page-shell { flex-direction: row; justify-content: space-between; }
    .site-footer .footer-brand-row { align-items: center; justify-content: flex-start; gap: 1rem; }
    .site-footer .footer-record { justify-content: flex-end; }
}

@media (min-width: 52rem) {
    .page-shell, .nav-shell { width: min(100% - 4rem,74rem); }
    .brand-logo { width: 9.5rem; height: 2.85rem; }
    .top-nav a { padding-inline: 1rem; }
    .hero { min-height: 48rem; align-items: center; padding-top: calc(var(--header-height) + 4.5rem); }
    .hero-layout { grid-template-columns: minmax(0,1.4fr) minmax(18rem,.75fr); align-items: center; }
    .hero-status { min-height: 25rem; }
    .section { padding: 7.5rem 0; }
    .section-heading { grid-template-columns: minmax(10rem,.35fr) minmax(0,1fr); gap: 2rem; margin-bottom: 3.5rem; }
    .solution-grid { grid-template-columns: repeat(3,1fr); }
    .product-layout, .capability-layout { grid-template-columns: minmax(0,1.15fr) minmax(18rem,.85fr); gap: 3rem; align-items: stretch; }
    .pcba-showcase { margin-top: 4rem; padding-top: 3.5rem; }
    .pcba-grid { grid-template-columns: repeat(4,minmax(0,1fr)); gap: 1rem; }
    .pcba-card img, .pcba-featured img { height: 15rem; padding: 1rem; }
    .pcba-card figcaption { padding: .85rem 1rem 1rem; }
    .product-layout .media-placeholder, .capability-placeholder { min-height: 30rem; }
    .contact-layout { grid-template-columns: minmax(0,1fr) minmax(16rem,.55fr); gap: 5rem; align-items: start; }
    .wechat-card { justify-self: end; }
    .product-shot, .product-shot img { height: 22rem; }
    .lab-shot, .lab-shot img { min-height: 22rem; }
}

@media (max-width: 22rem) {
    .page-shell, .nav-shell { width: min(100% - 1.5rem,74rem); }
    .brand-logo { width: 7.75rem; height: 2.35rem; }
    .top-nav a { font-size: .82rem; }
    .hero { padding-top: calc(var(--header-height) + 2.25rem); }
    .eyebrow { font-size: .72rem; letter-spacing: .1em; }
    .hero h1 { font-size: 2.25rem; }
    .hero-actions { display: grid; grid-template-columns: 1fr; }
    .tech-stack { grid-template-columns: 1fr; }
    .tech-frequency { grid-column: auto; }
}

@media (orientation: landscape) and (max-height: 32rem) {
    .hero { min-height: auto; padding-top: calc(var(--header-height) + 2.5rem); }
    .hero-layout { gap: 2rem; }
    .hero-status { min-height: 14rem; }
}

@media (min-width: 70rem) {
    .hero-layout { gap: 7rem; }
    .hero-status { transform: translateY(1.5rem); }
    .capability-card { padding: 1.8rem; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}