:root {
    /* v13.10.1：右侧参考主题——白/浅灰为主画布，亮橙承担重点品牌区块，黑灰仅作文字与页脚。 */
    --ink: #1F1F1F;
    --ink-2: #2F2F2F;
    --ink-3: #111111;
    --accent: #FF6700;
    --accent-dark: #E85D00;
    --accent-deep: #A83F00;
    --accent-soft: #FFF2E8;
    --accent-text: #C94D00;
    --accent-on-bright: #25140A;
    --accent-on-cyan: var(--accent-on-bright);
    --brand-bright: #FF6700;
    --paper: #ffffff;
    --surface: #F7F7F5;
    --surface-2: #EFEFED;
    --text: #2D2D2D;
    --muted: #666666;
    --line: rgba(31, 31, 31, .14);
    --shell: 1180px;
    --shadow: 0 20px 60px rgba(0, 0, 0, .12);
    --ease: cubic-bezier(.2, .75, .25, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--text); background: var(--paper); font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif; -webkit-font-smoothing: antialiased; }
body.is-locked { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
button { color: inherit; }
.shell { width: min(calc(100% - 48px), var(--shell)); margin-inline: auto; }
.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; overflow: hidden !important; padding: 0 !important; margin: -1px !important; border: 0 !important; clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 9999; padding: 12px 18px; background: var(--accent); color: var(--accent-on-cyan); transition: top .2s; }
.skip-link:focus { top: 16px; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; color: var(--accent-text); font-size: 12px; font-weight: 800; letter-spacing: .15em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 30px; height: 2px; background: currentColor; }
.section { padding: 112px 0; }
.section h2 { margin: 14px 0 0; color: var(--ink); font-size: clamp(34px, 4vw, 58px); line-height: 1.16; letter-spacing: -.04em; }
.section p { color: var(--muted); line-height: 1.85; }

.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 18px; padding: 0 24px; border: 0; border-radius: 2px; cursor: pointer; font-size: 14px; font-weight: 700; transition: transform .35s var(--ease), background .35s, color .35s, box-shadow .35s; }
.button:hover { transform: translateY(-3px); }
.button--small { min-height: 42px; padding-inline: 20px; }
.button--large { min-height: 58px; padding-inline: 30px; }
.button--dark { background: var(--ink); color: white; }
.button--dark:hover { background: var(--ink-2); box-shadow: 0 12px 30px rgba(0,0,0, .25); }
.button--accent { background: var(--accent); color: var(--accent-on-cyan); }
.button--accent:hover { background: var(--accent-dark); color: var(--accent-on-bright); box-shadow: 0 12px 30px rgba(232,93,0, .28); }
.button--light { background: white; color: var(--ink); }
.text-link { display: inline-flex; align-items: center; gap: 18px; padding: 4px 0 9px; border: 0; border-bottom: 1px solid currentColor; background: none; color: var(--ink); cursor: pointer; font-weight: 700; }
.text-link span { transition: transform .3s var(--ease); }
.text-link:hover span { transform: translateX(6px); }
.text-link--light { color: white; }

/* Header */
.site-header { position: relative; z-index: 1000; height: 108px; background: white; transition: box-shadow .3s; }
.site-header.is-fixed { position: fixed; inset: 0 0 auto; height: 72px; box-shadow: 0 8px 30px rgba(0,0,0, .12); animation: header-in .45s var(--ease); }
.site-header.is-fixed + main { padding-top: 108px; }
@keyframes header-in { from { transform: translateY(-100%); } to { transform: none; } }
.topbar { height: 32px; color: var(--accent-on-bright); background: var(--accent); font-size: 11px; font-weight: 700; letter-spacing: .05em; }
.topbar__inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.topbar nav { display: flex; gap: 24px; }
.topbar a { transition: color .2s; }
.topbar a:hover { color: white; }
.nav-shell { position: relative; height: 76px; display: flex; align-items: center; gap: 32px; }
.site-header.is-fixed .topbar { display: none; }
.site-header.is-fixed .nav-shell { height: 72px; }
.brand { flex: 0 0 auto; display: flex; align-items: center; gap: 12px; }
.brand__mark { position: relative; width: 40px; height: 36px; display: grid; place-items: center; }
.brand__mark i { position: absolute; left: 3px; width: 29px; height: 8px; transform: skewX(-24deg); background: var(--ink); }
.brand__mark i:nth-child(1) { top: 3px; }
.brand__mark i:nth-child(2) { top: 14px; left: 7px; width: 27px; background: var(--accent); }
.brand__mark i:nth-child(3) { top: 25px; left: 11px; width: 25px; }
.brand__copy { display: flex; flex-direction: column; }
.brand__copy strong { color: var(--ink); font-size: 22px; letter-spacing: .06em; }
.brand__copy small { margin-top: 2px; color: #777777; font-size: 7px; letter-spacing: .13em; }
.primary-nav { flex: 1; align-self: stretch; display: flex; align-items: stretch; justify-content: center; gap: 25px; }
.nav-item { position: relative; display: flex; align-items: center; }
.nav-item > a { position: relative; display: flex; height: 100%; align-items: center; color: var(--ink); font-size: 14px; white-space: nowrap; }
.nav-item > a::after { content: ""; position: absolute; left: 50%; right: 50%; bottom: 0; height: 3px; background: var(--accent); transition: left .25s, right .25s; }
.nav-item:hover > a::after, .nav-item.is-active > a::after { left: 0; right: 0; }
.mega-menu { position: fixed; top: 108px; left: 50%; width: min(calc(100vw - 48px), var(--shell)); min-height: 260px; display: grid; grid-template-columns: 34% 66%; visibility: hidden; opacity: 0; transform: translate(-50%, 15px); background: white; box-shadow: var(--shadow); transition: opacity .25s, transform .3s var(--ease), visibility .25s; pointer-events: none; }
.site-header.is-fixed .mega-menu { top: 72px; }
.nav-item:hover .mega-menu, .nav-item:focus-within .mega-menu { visibility: visible; opacity: 1; transform: translate(-50%, 0); pointer-events: auto; }
.mega-menu__intro { padding: 44px; color: var(--ink); background: var(--surface-2); }
.mega-menu__intro > span { color: var(--accent); font-size: 10px; font-weight: 800; letter-spacing: .18em; }
.mega-menu__intro strong { display: block; margin-top: 16px; font-size: 30px; }
.mega-menu__intro p { max-width: 250px; color: var(--muted); font-size: 13px; line-height: 1.7; }
.mega-menu__intro a { display: inline-flex; gap: 16px; margin-top: 20px; padding-bottom: 6px; border-bottom: 1px solid currentColor; color: var(--accent-text); font-size: 13px; }
.mega-menu__links { display: grid; grid-template-columns: repeat(2, 1fr); align-content: center; padding: 32px 44px; }
.mega-menu__links a { display: flex; align-items: center; justify-content: space-between; padding: 18px 0; border-bottom: 1px solid var(--line); color: var(--ink); font-weight: 700; transition: color .2s, padding .25s; }
.mega-menu__links a:nth-last-child(-n+2) { border-bottom: 0; }
.mega-menu__links a:nth-child(odd) { margin-right: 32px; }
.mega-menu__links a:hover { padding-left: 8px; color: var(--accent-text); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-phone { display: flex; flex-direction: column; align-items: flex-end; gap: 2px; color: var(--ink); line-height: 1.1; white-space: nowrap; }
.nav-phone span { color: var(--muted); font-size: 9px; letter-spacing: .08em; }
.nav-phone strong { font-size: 13px; }
.icon-button { width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 50%; background: white; cursor: pointer; }
.icon-button svg { width: 19px; fill: none; stroke: var(--ink); stroke-width: 1.7; }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 0; border: 0; background: none; }
.menu-toggle span { display: block; width: 24px; height: 2px; margin: 7px auto; background: var(--ink); }
.global-search-band { background: var(--surface); border-bottom: 1px solid var(--line); }
.global-search-band__form { display: flex; align-items: center; gap: 22px; padding: 18px 0; }
.global-search-band__form label { flex: 0 0 auto; color: var(--ink); font-size: 14px; font-weight: 700; }
.global-search-band__controls { display: flex; flex: 1; min-width: 0; border: 2px solid var(--ink); border-radius: 10px; background: #fff; overflow: hidden; }
.global-search-band__controls:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(255,103,0,.2); }
.global-search-band__controls input { flex: 1; min-width: 0; padding: 12px 16px; border: 0; outline: 0; color: var(--text); font-size: 15px; }
.global-search-band__controls .button { border-radius: 0; padding: 0 30px; font-size: 15px; }
.mobile-drawer { display: none; }
@media (max-width: 900px) {
    .global-search-band__form { flex-direction: column; align-items: stretch; gap: 8px; padding: 12px 0; }
    .global-search-band__form label { font-size: 13px; }
    .global-search-band__controls .button { min-width: 48px; min-height: 48px; padding: 0 14px; font-size: 15px; }
}

/* Hero */
.hero { position: relative; min-height: calc(100vh - 108px); overflow: hidden; color: white; background: var(--ink); }
.hero__media, .page-hero__media { position: absolute; inset: 0; background-image: var(--hero-image); background-position: center; background-size: cover; transform: scale(1.04); animation: hero-scale 8s var(--ease) forwards; }
@supports (background-image: image-set(url("data:image/gif;base64,R0lGODlhAQABAAAAACw=") type("image/avif"))) {
    .hero__media, .page-hero__media { background-image: var(--hero-image-modern, var(--hero-image)); }
}
@keyframes hero-scale { to { transform: scale(1); } }
.hero--home { color: var(--ink); background: linear-gradient(135deg, #fff 0%, var(--surface) 72%, var(--accent-soft) 100%); }
.hero--home::before { content: ""; position: absolute; inset: 0; opacity: .38; background-image: linear-gradient(rgba(31,31,31,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(31,31,31,.06) 1px, transparent 1px); background-size: 54px 54px; mask-image: linear-gradient(90deg, transparent, #000 46%, #000); }
.hero--home .hero__media { background: radial-gradient(circle at 76% 44%, rgba(255,103,0,.18), transparent 29%), radial-gradient(circle at 92% 18%, rgba(255,103,0,.09), transparent 22%); transform: none; animation: none; }
.hero__device-stage { position: absolute; z-index: 1; top: 9%; right: max(3vw, calc((100vw - var(--shell))/2)); bottom: 9%; width: min(43vw, 620px); pointer-events: none; }
.hero-device { position: absolute; margin: 0; overflow: hidden; border: 1px solid var(--line); background: #fff; box-shadow: 0 28px 80px rgba(0,0,0,.14); }
.hero-device img { width: 100%; height: 100%; object-fit: contain; transform: scale(1.28); }
.hero-device figcaption { position: absolute; right: 0; bottom: 0; left: 0; padding: 11px 14px; background: rgba(17,17,17,.92); color: rgba(255,255,255,.82); font-size: 10px; font-weight: 700; letter-spacing: .08em; }
.hero-device--primary { top: 4%; right: 9%; width: 58%; height: 78%; transform: rotate(2deg); }
.hero-device--secondary { right: 0; bottom: 2%; width: 35%; height: 42%; transform: rotate(4deg); }
.hero-device--tertiary { bottom: 0; left: 0; width: 39%; height: 37%; transform: rotate(-3deg); }
.hero__overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(255,255,255,.97) 0%, rgba(255,255,255,.82) 48%, rgba(255,255,255,.08) 78%); }
.hero__overlay::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(255,255,255,.72), transparent 38%); }
.hero__content { position: relative; z-index: 1; display: flex; min-height: calc(100vh - 108px); flex-direction: column; align-items: flex-start; justify-content: center; padding-top: 26px; padding-bottom: 100px; }
.hero__eyebrow { color: var(--brand-bright); }
.hero h1 { max-width: 680px; margin: 26px 0 24px; font-size: clamp(48px, 5.5vw, 76px); line-height: 1.08; letter-spacing: -.055em; text-shadow: none; }
.hero p { max-width: 590px; margin: 0; color: var(--muted); font-size: 18px; line-height: 1.8; }
.hero__actions { display: flex; align-items: center; gap: 32px; margin-top: 42px; }
.hero [data-hero-item] { opacity: 0; transform: translateY(28px); animation: hero-copy .75s var(--ease) forwards; }
.hero [data-hero-item]:nth-child(2) { animation-delay: .12s; }
.hero [data-hero-item]:nth-child(3) { animation-delay: .22s; }
.hero [data-hero-item]:nth-child(4) { animation-delay: .32s; }
@keyframes hero-copy { to { opacity: 1; transform: none; } }
.hero__foot { position: absolute; z-index: 2; left: 50%; bottom: 26px; display: flex; align-items: center; gap: 16px; transform: translateX(-50%); color: var(--muted); font-size: 9px; letter-spacing: .16em; }
.hero__foot i { flex: 1; height: 1px; background: var(--line); }

.proof-strip { position: relative; z-index: 3; margin-top: -1px; color: var(--accent-on-bright); background: var(--accent); }
.proof-strip__grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.proof-item { position: relative; display: flex; min-height: 128px; flex-direction: column; justify-content: center; padding: 0 32px; border-left: 1px solid rgba(37,20,10,.18); }
.proof-item:last-child { border-right: 1px solid rgba(37,20,10,.18); }
.proof-item strong { font-size: 34px; letter-spacing: -.03em; }
.proof-item span { margin-top: 8px; color: rgba(37,20,10,.72); font-size: 12px; }

/* Shared headings */
.split-heading { display: grid; grid-template-columns: 1.15fr .85fr; align-items: end; gap: 100px; }
.split-heading > div:last-child { padding-bottom: 5px; }
.split-heading p { margin: 0 0 24px; font-size: 15px; }
.split-heading--light h2, .split-heading--light p { color: white; }
.split-heading--light p { color: rgba(255,255,255,.62); }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 42px; }
.section-heading h2 { font-size: clamp(34px, 3.4vw, 52px); }
.centered-heading { max-width: 900px; margin: 0 auto; text-align: center; }
.centered-heading .eyebrow { justify-content: center; }
.centered-heading p { max-width: 760px; margin: 24px auto 0; }

/* Category stage */
.section--intro { overflow: hidden; background: var(--surface); }
.category-stage { margin-top: 74px; }
.category-tabs { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); }
.category-tabs button { position: relative; display: flex; min-height: 74px; align-items: center; gap: 16px; padding: 0 22px; border: 0; background: transparent; color: var(--muted); cursor: pointer; font-weight: 700; text-align: left; transition: color .25s; }
.category-tabs button span { font-size: 10px; font-weight: 500; }
.category-tabs button::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -1px; height: 3px; background: var(--accent); transition: right .35s var(--ease); }
.category-tabs button.is-active { color: var(--ink); }
.category-tabs button.is-active::after { right: 0; }
.category-visual { position: relative; min-height: 520px; background: white; box-shadow: var(--shadow); }
.category-panel { position: absolute; inset: 0; display: grid; grid-template-columns: 38% 62%; visibility: hidden; opacity: 0; transition: opacity .5s; pointer-events: none; }
.category-panel.is-active { visibility: visible; opacity: 1; pointer-events: auto; }
.category-panel__copy { display: flex; flex-direction: column; justify-content: center; padding: 70px; background: var(--accent); color: #fff; }
.category-panel__copy > span { color: #fff; font-size: 10px; letter-spacing: .16em; }
.category-panel__copy h3 { margin: 26px 0 18px; font-size: 38px; }
.category-panel__copy p { color: #fff; line-height: 1.8; }
.category-panel__copy i { margin-top: 34px; color: #fff; font-style: normal; font-weight: 700; }
.category-panel__image { position: relative; display: grid; place-items: center; overflow: hidden; background: linear-gradient(135deg, var(--surface), var(--surface-2)); }
.category-panel__image > span { position: absolute; right: -12px; bottom: -45px; color: rgba(0,0,0,.04); font-size: 230px; font-weight: 900; line-height: 1; }
.category-panel__image img { position: relative; z-index: 1; width: 72%; height: 74%; object-fit: contain; filter: drop-shadow(0 26px 32px rgba(0,0,0,.2)); transition: transform .8s var(--ease); }
.category-panel:hover .category-panel__image img { transform: translateY(-10px) scale(1.025); }

/* Product cards */
.section--products { overflow: hidden; }
.rail-controls { display: flex; gap: 8px; }
.rail-controls button { width: 48px; height: 48px; border: 1px solid var(--line); background: white; cursor: pointer; transition: .25s; }
.rail-controls button:hover { border-color: var(--accent); background: var(--accent); color: var(--accent-on-bright); }
.product-rail { display: grid; grid-auto-columns: minmax(260px, 1fr); grid-auto-flow: column; gap: 20px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; }
.product-rail::-webkit-scrollbar { display: none; }
.product-card { min-width: 0; scroll-snap-align: start; transition-delay: var(--delay, 0ms); }
.product-card > a { display: block; height: 100%; }
.product-card__visual { position: relative; display: grid; min-height: 350px; place-items: center; overflow: hidden; background: transparent; }
.product-card__visual::after { content: ""; position: absolute; inset: auto 0 0; height: 4px; transform: scaleX(0); transform-origin: left; background: var(--accent); transition: transform .45s var(--ease); }
.product-card__visual img { width: 94%; height: 310px; object-fit: contain; filter: drop-shadow(0 24px 22px rgba(0,0,0,.14)); transition: transform .6s var(--ease); }
.product-card:hover .product-card__visual img { transform: translateY(-10px) scale(1.035); }
.product-card:hover .product-card__visual::after { transform: scaleX(1); }
.product-card__badges { position: absolute; z-index: 2; top: 18px; left: 18px; display: flex; gap: 6px; }
.product-card__badges span { padding: 6px 9px; background: var(--accent); color: var(--accent-on-bright); font-size: 9px; font-weight: 800; letter-spacing: .08em; }
.product-card__badges .is-dark { background: var(--accent-text); }
.product-card__badges .is-dark { color: white; }
.product-card__arrow { position: absolute; right: 18px; bottom: 18px; width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; background: white; color: var(--ink); font-style: normal; opacity: 0; transform: translateY(8px); transition: .35s var(--ease); }
.product-card:hover .product-card__arrow { opacity: 1; transform: none; }
.product-card__body { padding: 22px 3px 6px; }
.product-card__body > span { color: var(--accent-text); font-size: 17px; font-weight: 800; letter-spacing: .04em; }
.product-card__body h3 { margin: 8px 0; color: var(--ink); font-size: 20px; }

/* Solutions */
.section--solutions { background: var(--accent); }
.solution-grid { display: grid; grid-template-columns: 1.15fr .85fr; grid-template-rows: repeat(2, 290px); gap: 18px; margin-top: 64px; }
.solution-card { position: relative; min-height: 290px; overflow: hidden; color: white; transition-delay: var(--delay, 0ms); }
.solution-card:first-child { grid-row: 1 / 3; }
.solution-card__media { position: absolute; inset: 0; background: var(--solution-image) center/cover; transition: transform .8s var(--ease); }
.solution-card__shade { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(17,17,17,.92), rgba(17,17,17,.05) 75%); }
.solution-card:hover .solution-card__media { transform: scale(1.055); }
.solution-card > span { position: absolute; top: 24px; right: 24px; color: rgba(255,255,255,.62); font-size: 11px; }
.solution-card > div:last-child { position: absolute; z-index: 1; inset: auto 30px 28px; }
.solution-card small { color: var(--accent-text); font-weight: 700; }
.solution-card h3 { margin: 8px 0; font-size: 28px; }
.solution-card p { max-width: 580px; margin: 0 0 14px; color: rgba(255,255,255,.62); font-size: 13px; line-height: 1.7; }
.solution-card i { font-style: normal; font-size: 12px; opacity: 0; transform: translateY(8px); transition: .35s; }
.solution-card:hover i { opacity: 1; transform: none; }

/* Capabilities and insights */
.section--capability { background: var(--surface); }
.capability-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 110px; }
.capability-copy { position: sticky; top: 120px; align-self: start; }
.capability-copy p { margin: 24px 0 32px; }
.capability-list { border-top: 1px solid var(--line); }
.capability-row { display: grid; grid-template-columns: 70px 1fr; gap: 22px; padding: 32px 0; border-bottom: 1px solid var(--line); }
.capability-row > span { color: var(--accent); font-size: 11px; }
.capability-row h3 { margin: 0 0 8px; color: var(--ink); font-size: 23px; }
.capability-row p { margin: 0; }
.insight-list { border-top: 1px solid var(--line); }
.insight-row { display: grid; grid-template-columns: 55px 100px 1fr 110px 24px; align-items: center; gap: 18px; min-height: 105px; border-bottom: 1px solid var(--line); transition: padding .3s, background .3s; }
.insight-row:hover { padding-inline: 18px; background: var(--surface); }
.insight-row > span { color: var(--accent); font-size: 11px; }
.insight-row small { color: var(--muted); }
.insight-row h3 { margin: 0; color: var(--ink); font-size: 18px; }
.insight-row time { color: var(--muted); font-size: 12px; }
.insight-row i { font-style: normal; }

/* Industry news and FAQ */
.section--industry-news { border-top: 1px solid var(--line); background: white; }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 54px; }
.news-card { position: relative; min-height: 360px; display: flex; flex-direction: column; overflow: hidden; padding: 34px; border: 1px solid var(--line); background: white; transition: color .4s, background .4s, border-color .4s, transform .4s var(--ease); }
.news-card::after { content: ""; position: absolute; right: -70px; bottom: -90px; width: 210px; height: 210px; border: 1px solid rgba(255,255,255,.12); border-radius: 50%; opacity: 0; transform: scale(.6); transition: .55s var(--ease); }
.news-card:hover { border-color: var(--ink); background: var(--ink); color: white; transform: translateY(-8px); }
.news-card:hover::after { opacity: 1; transform: scale(1); }
.news-card__meta { position: relative; z-index: 1; display: flex; justify-content: space-between; gap: 20px; color: var(--muted); font-size: 11px; }
.news-card__meta span { color: var(--accent); font-weight: 800; letter-spacing: .08em; }
.news-card__number { margin: 52px 0 20px; color: rgba(0,0,0,.12); font-size: 54px; font-weight: 800; line-height: 1; transition: color .4s; }
.news-card h3 { position: relative; z-index: 1; margin: 0; color: var(--ink); font-size: 24px; line-height: 1.45; transition: color .4s; }
.news-card p { position: relative; z-index: 1; margin: 18px 0 28px; font-size: 13px; line-height: 1.8; }
.news-card > i { position: relative; z-index: 1; margin-top: auto; color: var(--accent); font-size: 12px; font-style: normal; font-weight: 700; }
.news-card:hover h3 { color: white; }
.news-card:hover p, .news-card:hover .news-card__meta { color: rgba(255,255,255,.62); }
.news-card:hover .news-card__number { color: rgba(255,255,255,.12); }

.section--faq { background: var(--surface); }
.faq-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 100px; }
.faq-heading { position: sticky; top: 120px; align-self: start; }
.faq-heading h2 { margin: 20px 0 22px; }
.faq-heading p { max-width: 440px; margin: 0 0 32px; font-size: 15px; line-height: 1.85; }
.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary { min-height: 104px; display: grid; grid-template-columns: 48px 1fr 30px; align-items: center; gap: 18px; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary > span { color: var(--accent); font-size: 11px; font-weight: 800; }
.faq-item summary strong { color: var(--ink); font-size: 19px; line-height: 1.5; }
.faq-item summary i { position: relative; width: 26px; height: 26px; border: 1px solid var(--line); border-radius: 50%; transition: border-color .25s, transform .35s; }
.faq-item summary i::before, .faq-item summary i::after { content: ""; position: absolute; top: 50%; left: 50%; width: 9px; height: 1px; background: var(--ink); transform: translate(-50%,-50%); }
.faq-item summary i::after { transform: translate(-50%,-50%) rotate(90deg); transition: transform .3s; }
.faq-item[open] summary i { border-color: var(--accent); transform: rotate(180deg); }
.faq-item[open] summary i::after { transform: translate(-50%,-50%) rotate(0); }
.faq-item > div { padding: 0 48px 30px 66px; }
.faq-item > div p { max-width: 700px; margin: 0; line-height: 1.9; }

/* Solution, industry and case hubs */
.content-hero { position: relative; min-height: 560px; display: flex; align-items: end; overflow: hidden; background: var(--ink); color: white; }
.content-hero__media, .content-detail-hero__media { position: absolute; inset: 0; background: var(--content-hero, var(--detail-image)) center/cover; transform: scale(1.035); animation: hero-scale 8s var(--ease) forwards; }
.content-hero__overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(17,17,17,.94), rgba(17,17,17,.36) 72%); }
.content-hero__inner { position: relative; z-index: 1; padding-top: 140px; padding-bottom: 86px; }
.breadcrumbs { display: flex; align-items: center; gap: 9px; margin-bottom: 56px; color: rgba(255,255,255,.48); font-size: 11px; }
.breadcrumbs a { color: inherit; }
.breadcrumbs strong { color: white; font-weight: 500; }
.content-hero h1 { max-width: 950px; margin: 24px 0 20px; font-size: clamp(50px, 6vw, 78px); line-height: 1.12; letter-spacing: -.055em; }
.content-hero p { max-width: 700px; margin: 0; color: rgba(255,255,255,.7); font-size: 17px; line-height: 1.85; }
.content-stats { background: var(--ink); color: white; }
.content-stats__grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.content-stat { min-height: 138px; display: grid; grid-template-columns: 38px 1fr; align-content: center; gap: 7px 14px; padding: 25px 38px; border-left: 1px solid rgba(255,255,255,.1); }
.content-stat:last-child { border-right: 1px solid rgba(255,255,255,.1); }
.content-stat > span { grid-row: 1 / 3; color: var(--accent); font-size: 10px; }
.content-stat strong { font-size: 21px; }
.content-stat small { color: rgba(255,255,255,.45); }
.content-hub { background: white; }
.content-card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 64px; }
.content-card { position: relative; min-height: 420px; overflow: hidden; color: white; }
.content-card:first-child { grid-column: 1 / -1; min-height: 560px; }
.content-card__media { position: absolute; inset: 0; background: var(--card-image) center/cover; transition: transform .9s var(--ease); }
.content-card__shade { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(17,17,17,.95), rgba(17,17,17,.04) 72%); }
.content-card:hover .content-card__media { transform: scale(1.055); }
.content-card__top { position: absolute; z-index: 1; inset: 28px 30px auto; display: flex; justify-content: space-between; color: rgba(255,255,255,.68); font-size: 10px; letter-spacing: .1em; }
.content-card__top small { color: var(--brand-bright); font-weight: 700; }
.content-card__body { position: absolute; z-index: 1; inset: auto 36px 34px; }
.content-card__body > small { color: var(--brand-bright); font-weight: 700; }
.content-card__body h2 { max-width: 760px; margin: 11px 0 12px; color: white; font-size: clamp(29px, 3.5vw, 48px); }
.content-card:not(:first-child) .content-card__body h2 { font-size: 30px; }
.content-card__body p { max-width: 710px; margin: 0 0 18px; color: rgba(255,255,255,.63); font-size: 13px; line-height: 1.75; }
.content-card__body i { display: inline-block; font-size: 12px; font-style: normal; opacity: 0; transform: translateY(8px); transition: .35s; }
.content-card:hover .content-card__body i { opacity: 1; transform: none; }
.delivery-path { background: var(--surface); }
.delivery-path__grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 58px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.delivery-step { min-height: 310px; padding: 34px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.delivery-step > span { color: var(--accent); font-size: 11px; }
.delivery-step h3 { margin: 90px 0 14px; color: var(--ink); font-size: 22px; }
.delivery-step p { margin: 0; font-size: 13px; line-height: 1.8; }

/* Content detail */
.content-detail-hero { position: relative; min-height: 690px; display: flex; align-items: end; overflow: hidden; background: var(--ink); color: white; }
.content-detail-hero__overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(17,17,17,.96), rgba(17,17,17,.3) 78%), linear-gradient(0deg, rgba(17,17,17,.7), transparent 55%); }
.content-detail-hero__inner { position: relative; z-index: 1; padding-top: 150px; padding-bottom: 94px; }
.content-detail-hero h1 { max-width: 980px; margin: 24px 0; font-size: clamp(48px, 6vw, 76px); line-height: 1.12; letter-spacing: -.05em; }
.content-detail-hero p { max-width: 720px; margin: 0; color: rgba(255,255,255,.7); font-size: 17px; line-height: 1.85; }
.content-challenges { background: var(--surface); }
.related-products { background: var(--surface); }
.related-product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 54px; }
.content-detail-faq { border-top: 1px solid var(--line); }

/* Unified site search */
.search-hero { padding: 104px 0 92px; color: white; background: linear-gradient(125deg, var(--ink) 0%, var(--ink-2) 100%); }
.search-hero__inner { display: grid; grid-template-columns: 1fr minmax(380px, .85fr); align-items: end; gap: 26px 90px; }
.search-hero .eyebrow, .search-hero h1, .search-hero p { grid-column: 1; }
.search-hero h1 { max-width: 720px; margin: 8px 0 0; font-size: clamp(46px, 5vw, 68px); line-height: 1.12; letter-spacing: -.045em; }
.search-hero p { margin: 0; color: rgba(255,255,255,.65); line-height: 1.8; }
.site-search-form { grid-column: 2; grid-row: 1 / span 3; display: flex; align-self: end; border-bottom: 2px solid rgba(255,255,255,.85); }
.site-search-form input { min-width: 0; flex: 1; padding: 18px 2px; border: 0; outline: 0; background: transparent; color: white; font-size: 17px; }
.site-search-form input::placeholder { color: rgba(255,255,255,.42); }
.site-search-form button { flex: 0 0 auto; padding: 0 4px 0 24px; border: 0; background: none; color: white; cursor: pointer; font-weight: 700; }
.site-search-form button span { display: inline-block; margin-left: 12px; color: var(--accent); transition: transform .25s; }
.site-search-form button:hover span { transform: translateX(5px); }
.search-results { min-height: 520px; background: var(--surface); }
.search-summary { display: flex; align-items: end; justify-content: space-between; gap: 40px; padding-bottom: 44px; border-bottom: 1px solid var(--line); }
.search-summary h2 { font-size: clamp(32px, 4vw, 48px); }
.search-summary > strong { flex: 0 0 auto; color: var(--accent); font-size: 42px; }
.search-summary > strong small { color: var(--muted); font-size: 12px; font-weight: 400; }
.search-group { margin-top: 62px; }
.search-group > header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.search-group > header h3 { margin: 0; color: var(--ink); font-size: 22px; }
.search-group > header span { color: var(--muted); font-size: 12px; }
.search-result-list { border-top: 1px solid var(--line); }
.search-result { display: grid; grid-template-columns: 170px minmax(0, 1fr) 38px; align-items: center; gap: 34px; min-height: 164px; padding: 18px 4px 18px 0; border-bottom: 1px solid var(--line); transition: padding .3s var(--ease), background .3s; }
.search-result:hover { padding-left: 14px; background: white; }
.search-result__image { height: 126px; display: grid; place-items: center; overflow: hidden; background: white; }
.search-result__image img { width: 100%; height: 100%; object-fit: contain; transition: transform .4s var(--ease); }
.search-result:hover .search-result__image img { transform: scale(1.04); }
.search-result__copy { min-width: 0; }
.search-result__copy > span { color: var(--accent); font-size: 10px; font-weight: 800; letter-spacing: .09em; }
.search-result__copy h4 { margin: 9px 0 8px; overflow: hidden; color: var(--ink); font-size: 24px; text-overflow: ellipsis; white-space: nowrap; }
.search-result__copy p { max-width: 760px; margin: 0; display: -webkit-box; overflow: hidden; color: var(--muted); font-size: 13px; line-height: 1.75; -webkit-box-orient: vertical; -webkit-line-clamp: 2; }
.search-result > i { color: var(--accent); font-size: 19px; font-style: normal; transition: transform .3s; }
.search-result:hover > i { transform: translate(4px, -4px); }
.search-empty { padding: 96px 24px; border: 1px solid var(--line); background: white; text-align: center; }
.search-empty > span { color: var(--accent); font-size: 10px; font-weight: 800; letter-spacing: .16em; }
.search-empty h2 { margin-top: 18px; font-size: 38px; }
.search-empty p { margin-bottom: 30px; }

/* Product center */
.page-hero { position: relative; min-height: 430px; display: flex; align-items: center; overflow: hidden; color: white; background: var(--ink); }
.page-hero__overlay { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(17,17,17,.92), rgba(17,17,17,.28) 70%); }
.page-hero__content { position: relative; z-index: 1; padding-top: 20px; }
.page-hero h1 { margin: 20px 0 18px; font-size: clamp(44px, 5vw, 68px); letter-spacing: -.04em; }
.page-hero p { max-width: 600px; margin: 0; color: rgba(255,255,255,.78); font-size: 17px; line-height: 1.75; }
.product-intro { padding-bottom: 130px; background: var(--surface); }
.product-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 70px; padding: 0 0 18px; border-bottom: 1px solid var(--line); }
.filter-scroll { display: flex; align-items: center; gap: 8px; overflow-x: auto; scrollbar-width: none; }
.filter-scroll::-webkit-scrollbar { display: none; }
.filter-scroll a { flex: 0 0 auto; padding: 11px 18px; border: 1px solid transparent; color: var(--muted); font-size: 13px; transition: .25s; }
.filter-scroll a:hover, .filter-scroll a.is-active { border-color: var(--accent); background: var(--accent); color: var(--accent-on-bright); }
.product-search { flex: 0 0 260px; display: flex; border-bottom: 1px solid var(--ink); }
.product-search input { min-width: 0; flex: 1; padding: 10px 2px; border: 0; outline: 0; background: transparent; }
.product-search button { border: 0; background: none; color: var(--ink); font-size: 22px; cursor: pointer; }
.product-card--grid .product-card__visual { min-height: 390px; background: transparent; }
.product-card--grid .product-card__visual img { width: 94%; height: 340px; }
.empty-state { padding: 90px 0; text-align: center; }
.empty-state strong { color: var(--ink); font-size: 28px; }
.empty-state p { margin-bottom: 26px; color: var(--muted); }
.selection-guide { padding: 78px 0; color: white; background: var(--ink); }
.selection-guide__grid { display: flex; align-items: center; justify-content: space-between; gap: 48px; }
.selection-guide h2 { margin: 14px 0 10px; font-size: 42px; }
.selection-guide p { max-width: 700px; margin: 0; color: rgba(255,255,255,.62); line-height: 1.8; }

/* Product detail */
@keyframes product-float { 50% { transform: translateY(-10px); } }
.spec-table { margin: 0; border-top: 1px solid var(--line); }
.spec-table > div { display: grid; grid-template-columns: 32% 68%; border-bottom: 1px solid var(--line); }
.spec-table dt, .spec-table dd { margin: 0; padding: 22px 24px; }
.spec-table dt { color: var(--muted); }
.spec-table dd { border-left: 1px solid var(--line); color: var(--ink); font-weight: 700; }

/* Contact, footer, modal */
.contact-band { padding: 92px 0; color: var(--accent-on-bright); background: linear-gradient(125deg, var(--accent) 0%, #FF7A1A 100%); }
.contact-band__inner { display: flex; align-items: end; justify-content: space-between; gap: 50px; }
.contact-band span { font-size: 10px; font-weight: 800; letter-spacing: .16em; }
.contact-band h2 { margin: 16px 0 0; font-size: clamp(34px, 4vw, 54px); line-height: 1.24; letter-spacing: -.04em; }
.site-footer { padding-top: 82px; color: white; background: var(--ink-3); }
.footer-grid { display: grid; grid-template-columns: minmax(280px, 1.2fr) .55fr .7fr minmax(390px, 1.35fr); gap: 36px; padding-bottom: 64px; }
.brand--inverse .brand__copy strong { color: white; }
.brand--inverse .brand__mark i { background: white; }
.brand--inverse .brand__mark i:nth-child(2) { background: var(--accent); }
.footer-brand .brand__copy strong { font-size: 24px; }
.footer-brand p { max-width: 440px; margin-top: 24px; color: rgba(255,255,255,.62); font-size: 17px; line-height: 1.85; }
.footer-brand .brand__copy small { font-size: 14px; letter-spacing: .12em; }
.footer-brand .footer-brand__slogan { position: relative; margin-top: 28px; padding-top: 18px; max-width: none; color: #fff; font-size: 34px; font-weight: 800; letter-spacing: .08em; line-height: 1.3; }
.footer-brand .footer-brand__slogan::before { content: ""; position: absolute; top: 0; left: 0; width: 46px; height: 3px; background: var(--accent); }
.footer-links, .footer-contact { display: flex; flex-direction: column; gap: 13px; }
.footer-links h3, .footer-contact h3 { margin: 0 0 12px; font-size: 21px; }
.footer-links a, .footer-contact a, .footer-contact p { margin: 0; color: rgba(255,255,255,.7); font-size: 19px; line-height: 1.65; overflow-wrap: anywhere; transition: color .2s; }
.footer-links a:hover, .footer-contact a:hover { color: white; }
.footer-phones { display: flex; flex-direction: column; gap: 9px; margin-bottom: 4px; }
.footer-contact .footer-phone { display: flex; flex-direction: column; gap: 3px; color: white; font-size: 32px; font-weight: 800; line-height: 1.15; overflow-wrap: anywhere; }
.footer-contact .footer-phone small { color: rgba(255,255,255,.58); font-size: 14px; font-weight: 600; letter-spacing: .08em; }
.footer-contact .footer-phone--secondary { font-size: 26px; }
.footer-contact__details { display: grid; grid-template-columns: minmax(0, 1fr) 142px; gap: 22px; align-items: start; }
.footer-wechat-qr { align-self: start; margin: 0; padding: 7px; border-radius: 8px; background: #fff; color: var(--accent-on-bright); text-align: center; }
.footer-wechat-qr img { width: 100%; height: auto; aspect-ratio: 600 / 596; object-fit: contain; }
.footer-wechat-qr figcaption { padding: 8px 3px 4px; }
.footer-wechat-qr figcaption strong, .footer-wechat-qr figcaption span { display: block; color: var(--accent-on-bright); font-size: 13px; line-height: 1.45; }
.footer-wechat-qr figcaption span { margin-top: 2px; font-size: 11px; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; min-height: 70px; border-top: 1px solid rgba(255,255,255,.1); color: rgba(255,255,255,.38); font-size: 13px; }
.footer-bottom nav { display: flex; gap: 24px; }
.side-contact { position: fixed; z-index: 880; top: 50%; display: flex; flex-direction: column; gap: 8px; transform: translateY(-50%); }
.side-contact--left { left: 18px; }
.side-contact--right { right: 18px; }
.side-contact__item { position: relative; width: 54px; height: 58px; display: grid; place-items: center; padding: 0; border: 1px solid rgba(0,0,0,.13); background: rgba(255,255,255,.96); box-shadow: 0 10px 30px rgba(0,0,0,.12); color: var(--ink); cursor: pointer; backdrop-filter: blur(12px); transition: color .25s, background .25s, transform .25s; }
.side-contact__item:hover, .side-contact__item:focus-visible, .side-contact__item:focus-within { background: var(--accent-text); color: white; transform: translateY(-2px); }
.side-contact__item--accent { background: #fff; color: var(--ink); }
.side-contact__item svg { width: 21px; fill: none; stroke: currentColor; stroke-width: 1.55; stroke-linecap: round; stroke-linejoin: round; }
.side-contact__item > span, .side-contact__item > .side-contact__panel { position: absolute; top: 50%; width: 220px; display: flex; visibility: hidden; flex-direction: column; gap: 5px; padding: 15px 17px; opacity: 0; background: var(--ink); box-shadow: var(--shadow); color: white; text-align: left; pointer-events: none; transition: opacity .25s, transform .3s var(--ease), visibility .25s; }
.side-contact--left .side-contact__item > span, .side-contact--left .side-contact__item > .side-contact__panel { left: calc(100% + 10px); transform: translate(8px,-50%); }
.side-contact--right .side-contact__item > span, .side-contact--right .side-contact__item > .side-contact__panel { right: calc(100% + 10px); transform: translate(-8px,-50%); }
.side-contact__item:hover > span, .side-contact__item:focus-visible > span, .side-contact__item:hover > .side-contact__panel, .side-contact__item:focus-visible > .side-contact__panel { visibility: visible; opacity: 1; transform: translate(0,-50%); }
.side-contact__item strong { font-size: 13px; }
.side-contact__item small { overflow: hidden; color: rgba(255,255,255,.62); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
/* v13.7 电话卡展开层：热线→业务电话→手机/微信 三行可点 */
.side-contact__item--phones small { white-space: normal; }
.side-contact__item--phones > .side-contact__panel { width: 430px; gap: 16px; padding: 22px; }
.side-contact__item--phones > .side-contact__panel > strong { font-size: 20px; }
.side-contact__phone-grid { display: grid; grid-template-columns: minmax(0, 1fr) 142px; gap: 20px; align-items: start; }
.side-contact__item--phones small a { display: flex; flex-direction: column; gap: 2px; padding: 7px 0; color: rgba(255,255,255,.88); text-decoration: none; }
.side-contact__phone-links b { color: rgba(255,255,255,.58); font-size: 13px; font-weight: 600; }
.side-contact__phone-links em { color: #fff; font-size: 20px; font-style: normal; font-weight: 800; line-height: 1.25; }
.side-contact__qr { align-self: start; margin: 0; padding: 7px; border-radius: 7px; background: #fff; color: var(--accent-on-bright); text-align: center; }
.side-contact__qr img { width: 100%; height: auto; aspect-ratio: 600 / 596; object-fit: contain; }
.side-contact__qr figcaption { padding: 6px 2px 2px; }
.side-contact__qr figcaption b, .side-contact__qr figcaption small { display: block; color: var(--accent-on-bright); font-size: 12px; line-height: 1.4; }
.side-contact__qr figcaption small { margin-top: 1px; font-size: 10px; }
.side-contact__item--phones small a:hover, .side-contact__item--phones small a:focus-visible { color: #fff; text-decoration: underline; }
.side-contact__item--phones > .side-contact__panel { pointer-events: auto; }
.side-contact__item--phones > .side-contact__panel:hover, .side-contact__item--phones:focus-within > .side-contact__panel { visibility: visible; opacity: 1; transform: translate(0,-50%); }
.side-contact__item--top { margin-top: 0; }
.side-contact__item--top > span { background: var(--accent-text); }
.side-contact__item--top small { color: #fff; }
.contact-band h2, .contact-band .eyebrow, .contact-band__inner > div > span { color: #fff; }
.contact-band .button, .contact-band .button:hover, .contact-band .button:focus-visible { background: #fff; color: var(--accent-text); }
.modal { position: fixed; z-index: 3000; inset: 0; display: grid; visibility: hidden; place-items: center; padding: 24px; opacity: 0; transition: .3s; }
.modal.is-open { visibility: visible; opacity: 1; }
.modal__backdrop { position: absolute; inset: 0; background: rgba(0,0,0,.76); backdrop-filter: blur(6px); }
.modal__panel { position: relative; width: min(100%, 720px); max-height: calc(100vh - 48px); overflow-y: auto; padding: 54px; background: white; box-shadow: var(--shadow); transform: translateY(20px); transition: transform .4s var(--ease); }
.modal.is-open .modal__panel { transform: none; }
.modal__close { position: absolute; top: 18px; right: 20px; width: 36px; height: 36px; border: 0; background: var(--surface); color: var(--ink); cursor: pointer; font-size: 24px; }
.modal h2 { margin: 14px 0 8px; color: var(--ink); font-size: 34px; }
.modal > .modal__panel > p { margin: 0 0 30px; color: var(--muted); }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.form-grid label { display: flex; flex-direction: column; gap: 8px; }
.form-grid label span { color: var(--muted); font-size: 12px; }
.form-grid input, .form-grid textarea { width: 100%; padding: 13px 0; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; outline: 0; resize: vertical; transition: border .2s; }
.form-grid input:focus, .form-grid textarea:focus { border-color: var(--accent); }
.form-grid__full { grid-column: 1 / -1; }
.honeypot { position: absolute !important; left: -9999px !important; }
.form-submit { display: flex; align-items: center; gap: 18px; margin-top: 28px; }
.form-submit > span { color: var(--muted); font-size: 12px; }
.form-submit > span.is-error { color: #b42318; }
.form-submit > span.is-success { color: #087443; }

@media (max-width: 1360px) {
    .side-contact { display: none; }
}

/* Reveal motion */
.reveal { opacity: 0; transform: translateY(32px); transition: opacity .75s var(--ease), transform .75s var(--ease); transition-delay: var(--delay, 0ms); }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1100px) {
    .primary-nav { gap: 17px; }
    .nav-item > a { font-size: 13px; }
    .brand__copy small { display: none; }
    .nav-phone span { display: none; }
    .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 42px 36px; }
    .side-contact { display: none; }
}

@media (max-width: 900px) {
    .shell { width: min(calc(100% - 36px), var(--shell)); }
    .topbar, .primary-nav, .nav-actions .button, .nav-actions .icon-button { display: none; }
    .site-header, .site-header.is-fixed { height: 72px; }
    .site-header.is-fixed + main { padding-top: 72px; }
    .nav-shell { height: 72px; }
    .nav-actions { margin-left: auto; }
    .menu-toggle { display: block; }
    .mobile-drawer { position: fixed; z-index: 1100; inset: 0; display: flex; visibility: hidden; flex-direction: column; padding: 20px 28px 38px; opacity: 0; transform: translateX(100%); background: var(--ink); color: white; transition: .4s var(--ease); }
    .mobile-drawer.is-open { visibility: visible; opacity: 1; transform: none; }
    .mobile-drawer__head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.5); font-size: 11px; letter-spacing: .12em; }
    .mobile-drawer__head button { width: 42px; height: 42px; border: 1px solid rgba(255,255,255,.18); background: none; color: white; font-size: 28px; }
    .mobile-drawer nav { display: flex; flex-direction: column; }
    .mobile-drawer nav a { display: flex; align-items: center; justify-content: space-between; padding: 19px 0; border-bottom: 1px solid rgba(255,255,255,.12); font-size: 21px; font-weight: 700; }
    .mobile-drawer nav a span { color: var(--accent); font-size: 14px; }
    .mobile-drawer__contact { margin-top: auto; display: flex; flex-direction: column; gap: 10px; }
    .mobile-drawer__contact span { color: rgba(255,255,255,.45); font-size: 11px; }
    .mobile-drawer__contact a { display: flex; flex-direction: column; gap: 3px; font-size: 25px; font-weight: 800; }
    .mobile-drawer__contact a small { color: rgba(255,255,255,.45); font-size: 10px; font-weight: 400; letter-spacing: .08em; }
    .hero { min-height: 720px; }
    .hero__content { min-height: 720px; padding-bottom: 95px; }
    .hero h1 { font-size: clamp(44px, 9vw, 68px); }
    .proof-strip__grid { grid-template-columns: repeat(2, 1fr); }
    .proof-item:nth-child(3), .proof-item:nth-child(4) { border-top: 1px solid rgba(255,255,255,.12); }
    .split-heading, .capability-grid, .product-detail__grid, .faq-layout { grid-template-columns: 1fr; gap: 40px; }
    .category-tabs { grid-template-columns: repeat(2, 1fr); }
    .category-panel { grid-template-columns: 1fr; }
    .category-panel__copy { padding: 42px; }
    .category-panel__image { display: none; }
    .category-visual { min-height: 360px; }
    .solution-grid { grid-template-columns: 1fr; grid-template-rows: repeat(3, 320px); }
    .solution-card:first-child { grid-row: auto; }
    .capability-copy { position: static; }
    .faq-heading { position: static; }
    .news-grid { grid-template-columns: 1fr; }
    .news-card { min-height: 300px; }
    .content-card-grid { grid-template-columns: 1fr; gap: 46px; }
    .content-card:first-child { grid-column: auto; min-height: 460px; }
    .content-stats__grid, .related-product-grid { grid-template-columns: 1fr; }
    .delivery-path__grid { grid-template-columns: repeat(2, 1fr); }
    .search-hero__inner { grid-template-columns: 1fr; }
    .search-hero .eyebrow, .search-hero h1, .search-hero p, .site-search-form { grid-column: 1; }
    .site-search-form { grid-row: auto; margin-top: 22px; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .shell { width: calc(100% - 28px); }
    .section { padding: 78px 0; }
    .section h2 { font-size: 34px; }
    .brand__copy strong { font-size: 19px; }
    .hero, .hero__content { min-height: calc(100svh - 72px); }
    .hero__media { background-position: 56% center; }
    .hero--home .hero__overlay { background: linear-gradient(90deg, rgba(255,255,255,.97), rgba(255,255,255,.82)); }
    .hero--home .hero__overlay::after { background: linear-gradient(0deg, rgba(255,255,255,.76), transparent 42%); }
    .hero h1 { margin-top: 22px; font-size: 43px; }
    .hero p { font-size: 15px; }
    .hero__actions { align-items: flex-start; flex-direction: column; gap: 22px; margin-top: 32px; }
    .proof-item { min-height: 105px; padding: 0 18px; }
    .proof-item strong { font-size: 28px; }
    .category-tabs { display: flex; overflow-x: auto; }
    .category-tabs button { flex: 0 0 170px; }
    .category-panel__copy { padding: 30px; }
    .category-panel__copy h3 { font-size: 30px; }
    .product-rail { grid-auto-columns: 82%; }
    .product-card__visual, .product-card--grid .product-card__visual { min-height: 310px; }
    .product-card__visual img, .product-card--grid .product-card__visual img { height: 245px; }
    .solution-grid { grid-template-rows: repeat(3, 380px); }
    .capability-row { grid-template-columns: 42px 1fr; }
    .insight-row { grid-template-columns: 38px 1fr 20px; min-height: 110px; }
    .insight-row small, .insight-row time { display: none; }
    .insight-row h3 { font-size: 15px; }
    .faq-item summary { grid-template-columns: 34px 1fr 28px; gap: 12px; }
    .faq-item summary strong { font-size: 16px; }
    .faq-item > div { padding-left: 46px; padding-right: 8px; }
    .content-hero { min-height: 530px; }
    .content-hero__inner { padding-top: 100px; padding-bottom: 54px; }
    .content-hero h1 { font-size: 43px; }
    .breadcrumbs { margin-bottom: 38px; }
    .content-stats__grid { grid-template-columns: 1fr; }
    .content-stat { min-height: 105px; border-right: 1px solid rgba(255,255,255,.1); border-bottom: 1px solid rgba(255,255,255,.1); }
    .content-card, .content-card:first-child { min-height: 440px; }
    .content-card__body { inset: auto 24px 26px; }
    .content-card__body h2, .content-card:not(:first-child) .content-card__body h2 { font-size: 28px; }
    .delivery-path__grid { grid-template-columns: 1fr; }
    .delivery-step { min-height: 250px; }
    .delivery-step h3 { margin-top: 58px; }
    .content-detail-hero { min-height: 650px; }
    .content-detail-hero__inner { padding-top: 100px; padding-bottom: 65px; }
    .content-detail-hero h1 { font-size: 42px; }
    .page-hero { min-height: 390px; }
    .page-hero h1 { font-size: 43px; }
    .product-toolbar { align-items: stretch; flex-direction: column; }
    .product-search { flex-basis: auto; }
    .search-hero { padding: 76px 0 70px; }
    .search-hero h1 { font-size: 42px; }
    .site-search-form { align-items: stretch; flex-direction: column; border-bottom: 0; }
    .site-search-form input { border-bottom: 2px solid rgba(255,255,255,.85); }
    .site-search-form button { min-height: 50px; padding: 0; text-align: left; }
    .search-summary { align-items: flex-start; flex-direction: column; }
    .search-result { grid-template-columns: 96px minmax(0, 1fr) 20px; gap: 16px; min-height: 132px; }
    .search-result__image { height: 92px; }
    .search-result__copy h4 { font-size: 18px; }
    .search-result__copy p { -webkit-line-clamp: 1; }
    .selection-guide__grid, .contact-band__inner { align-items: flex-start; flex-direction: column; }
    .selection-guide h2 { font-size: 34px; }
    .spec-table > div { grid-template-columns: 1fr; }
    .spec-table dd { padding-top: 0; border-left: 0; }
    .contact-band h2 { font-size: 34px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-links { display: none; }
    .footer-bottom { align-items: flex-start; flex-direction: column; justify-content: center; gap: 10px; }
    .modal { padding: 0; align-items: end; }
    .modal__panel { width: 100%; max-height: 92svh; padding: 42px 22px 28px; }
    .modal h2 { font-size: 28px; }
    .form-grid { grid-template-columns: 1fr; }
    .form-grid__full { grid-column: auto; }
    .form-submit { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
    .reveal { opacity: 1; transform: none; }
}

/* Full-page preview capture: avoids browser tiling fixed and sticky elements. */
.capture-mode { scroll-behavior: auto !important; }
.capture-mode .site-header,
.capture-mode .site-header.is-fixed {
    position: relative;
    inset: auto;
    height: 108px;
    animation: none;
    box-shadow: none;
}
.capture-mode .site-header.is-fixed + main { padding-top: 0; }
.capture-mode .site-header.is-fixed .topbar { display: flex; }
.capture-mode .site-header.is-fixed .nav-shell { height: 76px; }
.capture-mode .capability-copy,
.capture-mode .detail-nav { position: relative; top: auto; }
.capture-mode .side-contact { display: none; }
.capture-mode .reveal { opacity: 1; transform: none; }

.form-consent { display: flex; align-items: flex-start; gap: 10px; margin-top: 16px; color: #5F5F5F; font-size: 13px; line-height: 1.7; }
.form-consent input { width: 16px; height: 16px; margin-top: 3px; flex: 0 0 auto; }
.form-consent a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
.legal-page { padding-top: 150px; background: var(--surface); }
.legal-page__content { max-width: 900px; padding: 64px; background: #fff; box-shadow: 0 18px 60px rgba(0,0,0,.08); }
.legal-page__content h1 { margin: 12px 0 32px; font-size: clamp(40px, 6vw, 64px); color: var(--ink); }
.legal-page__content h2 { margin: 36px 0 12px; font-size: 23px; color: var(--ink); }
.legal-page__content p { color: #5F5F5F; line-height: 1.9; }
@media (max-width: 720px) {
    .legal-page { padding-top: 105px; }
    .legal-page__content { padding: 36px 22px; }
}

/* Knowledge, downloads, about and contact */
.resource-hero { position: relative; min-height: 540px; overflow: hidden; color: white; background: var(--ink); }
.resource-hero::before { content: ""; position: absolute; inset: 0; opacity: .34; background-size: cover; background-position: center; }
.resource-hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(17,17,17,.96) 4%, rgba(17,17,17,.74) 52%, rgba(17,17,17,.25)); }
.resource-hero--knowledge::before { background-image: url('/static/style/images/news-banner.jpg'); }
.resource-hero--downloads::before { background-image: url('/static/style/images/product-banner.jpg'); }
.resource-hero--about::before { background-image: url('/static/style/images/about-banner.jpg'); }
.resource-hero--contact::before { background-image: url('/static/style/images/about-video.jpg'); background-position: center 42%; }
.resource-hero__inner { position: relative; z-index: 1; display: flex; min-height: 540px; flex-direction: column; justify-content: center; padding: 78px 0 82px; }
.resource-hero .breadcrumbs { margin-bottom: 64px; color: rgba(255,255,255,.55); }
.resource-hero .breadcrumbs a:hover { color: white; }
.resource-hero h1 { max-width: 900px; margin: 18px 0 20px; font-size: clamp(48px, 6vw, 78px); line-height: 1.08; letter-spacing: -.055em; }
.resource-hero p { max-width: 700px; margin: 0; color: rgba(255,255,255,.7); font-size: 17px; line-height: 1.9; }
.resource-filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 48px; }
.resource-filters a { padding: 11px 18px; border: 1px solid var(--line); color: var(--muted); font-size: 13px; font-weight: 700; transition: .25s; }
.resource-filters a:hover, .resource-filters a.is-active { border-color: var(--ink); background: var(--ink); color: white; }
.knowledge-index { background: var(--surface); }
.knowledge-feature { display: grid; min-height: 460px; grid-template-columns: 56% 44%; overflow: hidden; background: white; box-shadow: 0 16px 50px rgba(0,0,0,.08); }
.knowledge-feature__image { overflow: hidden; }
.knowledge-feature__image img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s var(--ease); }
.knowledge-feature:hover .knowledge-feature__image img { transform: scale(1.035); }
.knowledge-feature__copy { display: flex; flex-direction: column; justify-content: center; padding: 56px; }
.knowledge-feature__copy > span, .knowledge-card__body > span { color: var(--accent); font-size: 11px; font-weight: 800; letter-spacing: .08em; }
.knowledge-feature__copy h2 { margin: 22px 0 16px; font-size: clamp(31px, 3.5vw, 48px); line-height: 1.2; letter-spacing: -.035em; }
.knowledge-feature__copy p { margin: 0 0 34px; }
.knowledge-feature__copy strong { display: inline-flex; align-items: center; gap: 18px; color: var(--ink); font-size: 14px; }
.knowledge-feature__copy i { color: var(--accent); font-style: normal; }
.knowledge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; margin-top: 32px; }
.knowledge-card { min-width: 0; background: white; }
.knowledge-card__image { display: block; height: 230px; overflow: hidden; background: var(--surface-2); }
.knowledge-card__image img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease); }
.knowledge-card:hover img { transform: scale(1.045); }
.knowledge-card__body { padding: 28px 28px 32px; }
.knowledge-card h2 { margin: 16px 0 12px; font-size: 23px; line-height: 1.35; letter-spacing: -.02em; }
.knowledge-card p { min-height: 78px; margin: 0 0 22px; font-size: 14px; }
.resource-empty { padding: 70px; background: white; text-align: center; }
.resource-empty strong { color: var(--ink); font-size: 26px; }
.resource-empty p { margin: 12px 0 24px; }

.article-hero { padding: 95px 0 100px; color: white; background: var(--ink); }
.article-hero .breadcrumbs { color: rgba(255,255,255,.5); }
.article-hero h1 { max-width: 930px; margin: 54px 0 20px; font-size: clamp(44px, 5.6vw, 72px); line-height: 1.12; letter-spacing: -.05em; }
.article-hero p { max-width: 760px; color: rgba(255,255,255,.66); font-size: 18px; line-height: 1.8; }
.article-meta { display: flex; gap: 24px; margin-top: 32px; color: rgba(255,255,255,.46); font-size: 12px; }

.download-center { background: var(--surface); }
.download-list { margin-top: 58px; border-top: 1px solid var(--line); }
.download-row { display: grid; min-height: 156px; grid-template-columns: 74px minmax(0, 1fr) 170px 130px; align-items: center; gap: 28px; border-bottom: 1px solid var(--line); background: white; padding: 28px 30px; }
.download-row__number { align-self: start; color: var(--accent); font-size: 13px; font-weight: 800; }
.download-row__copy > span { color: var(--muted); font-size: 10px; font-weight: 800; letter-spacing: .1em; }
.download-row__copy h3 { margin: 8px 0 6px; color: var(--ink); font-size: 22px; }
.download-row__copy p { margin: 0; font-size: 13px; }
.download-row__meta { display: flex; flex-direction: column; gap: 7px; color: var(--muted); font-size: 12px; }
.download-row__action { display: inline-flex; min-height: 48px; align-items: center; justify-content: space-between; gap: 14px; padding: 0 17px; border: 1px solid var(--ink); background: transparent; color: var(--ink); cursor: pointer; font-size: 13px; font-weight: 800; }
.download-row__action:hover { background: var(--ink); color: white; }
.download-note { display: flex; align-items: center; gap: 24px; margin-top: 36px; padding: 34px 38px; color: white; background: var(--ink); }
.download-note strong { font-size: 20px; }
.download-note p { flex: 1; margin: 0; color: rgba(255,255,255,.62); font-size: 13px; }

.about-intro__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; }
.about-intro__copy p { margin: 0 0 26px; color: var(--text); font-size: 21px; font-weight: 600; line-height: 1.9; }
.about-capabilities { padding: 0 0 112px; }
.about-capabilities__grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.about-capability { min-height: 350px; padding: 42px; border: 1px solid var(--line); border-right: 0; }
.about-capability:last-child { border-right: 1px solid var(--line); }
.about-capability > span { color: var(--accent); font-size: 12px; font-weight: 800; }
.about-capability h3 { margin: 72px 0 16px; color: var(--ink); font-size: 29px; }
.about-capability p { color: var(--muted); line-height: 1.8; }
.about-capability a { display: inline-flex; gap: 18px; margin-top: 24px; font-size: 13px; font-weight: 800; }
.about-capability i { color: var(--accent); font-style: normal; }
.about-workflow { background: var(--surface); }
.about-workflow__grid { display: grid; grid-template-columns: 52% 48%; align-items: stretch; }
.about-workflow__image { min-height: 620px; }
.about-workflow__image img { width: 100%; height: 100%; object-fit: cover; }
.about-workflow__copy { padding: 62px 0 62px 72px; }
.about-workflow__copy ol { margin: 42px 0 0; padding: 0; list-style: none; counter-reset: workflow; }
.about-workflow__copy li { position: relative; padding: 0 0 28px 54px; counter-increment: workflow; }
.about-workflow__copy li::before { content: "0" counter(workflow); position: absolute; left: 0; color: var(--accent); font-size: 12px; font-weight: 800; }
.about-workflow__copy li::after { content: ""; position: absolute; left: 17px; top: 27px; bottom: 7px; width: 1px; background: var(--line); }
.about-workflow__copy li:last-child::after { display: none; }
.about-workflow__copy strong { color: var(--ink); font-size: 19px; }
.about-workflow__copy p { margin: 8px 0 0; }

.contact-page { background: var(--surface); }
.contact-page__grid { display: grid; grid-template-columns: 38% 62%; box-shadow: 0 20px 70px rgba(0,0,0,.09); }
.contact-directory { padding: 54px; color: white; background: var(--ink); }
.contact-directory h2, .contact-form-panel h2 { margin: 16px 0 32px; font-size: 42px; }
.contact-directory h2 { color: white; }
.contact-directory > a, .contact-directory > div { position: relative; display: flex; flex-direction: column; gap: 8px; padding: 22px 0; border-bottom: 1px solid rgba(255,255,255,.13); }
.contact-directory small { color: rgba(255,255,255,.45); font-size: 11px; }
.contact-directory strong { overflow-wrap: anywhere; font-size: 18px; }
.contact-directory > a > span { position: absolute; right: 0; bottom: 25px; color: var(--accent); }
.contact-directory > p { margin-top: 28px; color: rgba(255,255,255,.48); font-size: 12px; }
.contact-form-panel { padding: 54px 64px; background: white; }
.contact-form-panel > p { margin: -20px 0 38px; }

@media (max-width: 900px) {
    .knowledge-feature, .about-intro__grid, .about-workflow__grid, .contact-page__grid, .article-layout { grid-template-columns: 1fr; }
    .knowledge-grid { grid-template-columns: repeat(2, 1fr); }
    .knowledge-feature__image { min-height: 360px; }
    .download-row { grid-template-columns: 50px minmax(0, 1fr) 125px; }
    .download-row__action { grid-column: 2 / -1; width: max-content; }
    .about-intro__grid { gap: 42px; }
    .about-capabilities__grid { grid-template-columns: 1fr; }
    .about-capability, .about-capability:last-child { min-height: 260px; border-right: 1px solid var(--line); border-bottom: 0; }
    .about-capability:last-child { border-bottom: 1px solid var(--line); }
    .about-capability h3 { margin-top: 42px; }
    .about-workflow__image { min-height: 460px; }
    .about-workflow__copy { padding-left: 0; }
    .footer-brand .footer-brand__slogan { font-size: 24px; letter-spacing: .04em; }
    .footer-brand p, .footer-links a, .footer-contact a, .footer-contact p { font-size: 18px; }
    .footer-contact .footer-phone { font-size: 28px; }
    .footer-contact .footer-phone--secondary { font-size: 24px; }
}

@media (max-width: 640px) {
    .resource-hero, .resource-hero__inner { min-height: 500px; }
    .resource-hero__inner { padding: 70px 0 58px; }
    .resource-hero .breadcrumbs { margin-bottom: 48px; }
    .resource-hero h1 { font-size: 43px; }
    .resource-hero p { font-size: 15px; }
    .resource-filters { overflow-x: auto; flex-wrap: nowrap; margin-right: -14px; }
    .resource-filters a { flex: 0 0 auto; }
    .knowledge-feature { min-height: 0; }
    .knowledge-feature__image { min-height: 250px; }
    .knowledge-feature__copy { padding: 30px 24px 36px; }
    .knowledge-grid { grid-template-columns: 1fr; }
    .knowledge-card__image { height: 215px; }
    .article-hero { padding: 70px 0 75px; }
    .article-hero h1 { margin-top: 42px; font-size: 41px; }
    .download-row { grid-template-columns: 34px minmax(0, 1fr); gap: 16px; padding: 26px 20px; }
    .download-row__meta, .download-row__action { grid-column: 2; }
    .download-note { align-items: flex-start; flex-direction: column; padding: 28px 24px; }
    .about-capability { padding: 30px 25px; }
    .about-workflow__image { min-height: 320px; }
    .about-workflow__copy { padding-top: 46px; padding-bottom: 0; }
    .contact-directory, .contact-form-panel { padding: 36px 24px; }
    .contact-directory h2, .contact-form-panel h2 { font-size: 34px; }
    .about-intro__copy p { margin-bottom: 20px; font-size: 18px; font-weight: 600; line-height: 1.85; }
    .footer-contact__details { grid-template-columns: 1fr; }
    .footer-wechat-qr { width: 160px; }
}

/* FAQ 独立页 */
.resource-hero--faq::before { background-image: url('/static/style/images/news-banner.jpg'); }
.faq-page { background: var(--surface); }
.faq-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.faq-search { flex: 1; max-width: 560px; }
.faq-search label { display: block; margin-bottom: 8px; color: var(--muted); font-size: 12px; }
.faq-search > div { display: flex; border: 1px solid var(--line); background: white; }
.faq-search input { flex: 1; min-width: 0; padding: 14px 18px; border: 0; outline: none; font-size: 15px; }
.faq-search button { width: 54px; border: 0; background: var(--ink); color: white; cursor: pointer; font-size: 20px; }
.faq-total { color: var(--muted); font-size: 13px; }
.faq-list--page { margin-top: 8px; border-top: 1px solid var(--line); }
.faq-list--page .faq-item { background: white; padding-left: 18px; }
.faq-list--page .faq-item > div { position: relative; }
.faq-item__anchor { display: inline-block; margin-top: 14px; color: var(--muted); font-size: 12px; }
.faq-item__anchor:hover { color: var(--accent); }
.faq-item__meta { display: flex; align-items: center; gap: 16px; margin-top: 12px; }
.faq-item__meta > span { color: var(--muted); font-size: 12px; }
.faq-item__meta .faq-item__anchor { margin-top: 0; }
.faq-pagination { display: flex; align-items: center; justify-content: center; gap: 22px; margin-top: 40px; }
.faq-pagination a, .faq-pagination .is-disabled { display: inline-flex; min-height: 42px; align-items: center; padding: 0 18px; border: 1px solid var(--line); color: var(--ink); font-size: 13px; font-weight: 700; }
.faq-pagination a:hover { border-color: var(--ink); background: var(--ink); color: white; }
.faq-pagination .is-disabled { color: var(--muted); opacity: .5; }
.faq-pagination__info { color: var(--muted); font-size: 13px; }
.data-source-note { margin-top: 34px; color: var(--muted); font-size: 12px; }
.content-boundary { margin-top: 26px; padding: 16px 20px; border-left: 3px solid var(--line); color: var(--muted); font-size: 13px; }

/* 下载分组 */
.download-group { margin-top: 44px; }
.download-group__head { display: flex; align-items: baseline; gap: 14px; padding: 0 6px 14px; border-bottom: 2px solid var(--ink); }
.download-group__head > span { color: var(--accent); font-size: 12px; font-weight: 800; }
.download-group__head h3 { margin: 0; color: var(--ink); font-size: 24px; }
.download-group__head p { margin: 0; color: var(--muted); font-size: 12px; }
.download-group .download-list { margin-top: 0; }

/* 404 / 403 */
.error-hero { position: relative; min-height: 560px; display: flex; align-items: center; color: white; background: var(--ink); }
.error-hero__inner { display: flex; min-height: 560px; flex-direction: column; justify-content: center; padding: 90px 0; }
.error-hero h1 { max-width: 900px; margin: 20px 0 22px; font-size: clamp(52px, 7vw, 96px); line-height: 1.02; letter-spacing: -.05em; }
.error-hero p { max-width: 620px; margin: 0; color: rgba(255,255,255,.7); font-size: 17px; line-height: 1.9; }
.error-hero__actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 40px; }

/* 关于我们-荣誉 */
.about-honors { background: var(--surface); }
.about-honors__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; margin-top: 46px; }
.about-honor { margin: 0; overflow: hidden; background: white; box-shadow: var(--shadow); }
.about-honor img { width: 100%; height: 100%; object-fit: contain; }

@media (max-width: 640px) {
    .faq-toolbar { flex-direction: column; align-items: stretch; }
    .error-hero, .error-hero__inner { min-height: 480px; }
    .error-hero__actions { flex-direction: column; align-items: stretch; }
    .download-group__head { flex-wrap: wrap; }
}

/* v13.1.1 任务C：完整单栏阅读页 */
.reading-column { max-width: 960px; margin: 0 auto; }
.reading-meta { margin: 0 0 42px; border-top: 1px solid var(--line); }
.reading-meta > div { display: grid; grid-template-columns: 150px 1fr; gap: 28px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.reading-meta dt { color: var(--muted); }
.reading-meta dd { margin: 0; color: var(--ink); font-weight: 700; overflow-wrap: anywhere; }
.reading-body { color: var(--ink); font-size: 17px; line-height: 1.95; overflow-wrap: anywhere; }
.reading-body > :first-child { margin-top: 0; }
.reading-body p { margin: 0 0 1.4em; }
.reading-body h2 { margin: 1.8em 0 .7em; font-size: 28px; line-height: 1.4; letter-spacing: -.01em; }
.reading-body h3 { margin: 1.6em 0 .6em; font-size: 22px; line-height: 1.45; }
.reading-body h4 { margin: 1.4em 0 .5em; font-size: 18px; }
.reading-body ul, .reading-body ol { margin: 0 0 1.4em; padding-left: 1.4em; }
.reading-body li { margin-bottom: .45em; }
.reading-body a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.reading-body img { max-width: 100%; height: auto; display: block; margin: 1.6em auto; border-radius: 8px; }
.reading-body figure { margin: 1.6em 0; }
.reading-body figcaption { margin-top: 10px; color: var(--muted); font-size: 13px; text-align: center; }
.reading-body blockquote { margin: 1.6em 0; padding: 4px 0 4px 20px; border-left: 3px solid var(--accent); color: var(--muted); }
.reading-body table { width: 100%; border-collapse: collapse; margin: 1.6em 0; font-size: 14px; }
.reading-body th, .reading-body td { border: 1px solid #D8D8D5; padding: 10px 14px; text-align: left; line-height: 1.7; }
.reading-body thead th { background: var(--ink); color: #fff; }
.reading-body tbody th { background: var(--surface); }
.reading-cta { margin: 56px auto 0; max-width: 960px; padding: 44px; background: var(--surface); border-radius: 12px; text-align: center; }
.reading-cta h2 { margin: 0 0 12px; font-size: 26px; }
.reading-cta p { margin: 0 0 22px; color: var(--muted); }
.reading-cta .text-link { margin-left: 18px; }
@media (max-width: 640px) {
    .reading-meta > div { grid-template-columns: 1fr; gap: 6px; padding: 12px 0; }
    .reading-body { font-size: 16px; }
    .reading-body h2 { font-size: 23px; }
    .reading-body h3 { font-size: 19px; }
    .reading-body table { display: block; overflow-x: auto; }
    .reading-cta { padding: 28px 20px; }
}

/* v13.5 渐进增强：SSR 区域在异步更新时保留布局并提供清晰焦点。 */
[data-async-region] { transition: opacity .18s ease; }
[data-async-region][aria-busy="true"] { opacity: .58; }
[data-async-focus]:focus-visible { outline: 3px solid rgba(255,103,0, .35); outline-offset: 5px; }

/* Chat widget (v13.1.1) */
.chat-widget { position: fixed; right: 18px; bottom: 18px; z-index: 2900; font-size: 14px; }
.chat-widget__toggle { display: flex; align-items: center; gap: 8px; padding: 12px 18px; border: 0; border-radius: 999px; background: var(--accent); color: var(--accent-on-cyan); cursor: pointer; box-shadow: 0 12px 30px rgba(0,0,0,.28); transition: transform .25s, background .25s; }
.chat-widget__toggle:hover, .chat-widget__toggle:focus-visible { transform: translateY(-2px); }
.chat-widget__toggle svg { width: 20px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.chat-widget__toggle span { font-size: 14px; font-weight: 600; }
.chat-widget__panel { position: absolute; right: 0; bottom: calc(100% + 12px); width: min(360px, calc(100vw - 36px)); max-height: min(560px, calc(100vh - 120px)); display: none; flex-direction: column; overflow: hidden; border: 1px solid rgba(0,0,0,.12); border-radius: 12px; background: #fff; box-shadow: 0 24px 60px rgba(0,0,0,.24); }
.chat-widget__panel.is-open { display: flex; }
.chat-widget__header { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; padding: 14px 16px; background: var(--ink); color: #fff; }
.chat-widget__header strong { display: block; font-size: 15px; }
.chat-widget__header small { display: block; margin-top: 3px; color: rgba(255,255,255,.65); font-size: 12px; }
.chat-widget__close { border: 0; background: none; color: #fff; cursor: pointer; font-size: 22px; line-height: 1; padding: 2px 4px; }
.chat-widget__load-older { width: 100%; padding: 7px 12px; border: 0; border-bottom: 1px solid rgba(0,0,0,.08); background: var(--surface); color: #5F5F5F; cursor: pointer; font-size: 12px; }
.chat-widget__load-older:hover, .chat-widget__load-older:focus-visible { color: var(--accent); text-decoration: underline; }
.chat-widget__messages { flex: 1 1 auto; min-height: 160px; overflow-y: auto; padding: 14px; background: var(--surface); }
.chat-widget__message { margin-bottom: 12px; max-width: 85%; }
.chat-widget__message p { margin: 0; padding: 9px 12px; border-radius: 10px; font-size: 14px; line-height: 1.65; white-space: pre-wrap; word-break: break-word; }
.chat-widget__message small { display: block; margin-top: 4px; color: #777777; font-size: 11px; }
.chat-widget__message--admin p { background: #fff; border: 1px solid rgba(0,0,0,.1); color: var(--ink); border-top-left-radius: 2px; }
.chat-widget__message--visitor { margin-left: auto; text-align: right; }
.chat-widget__message--visitor p { background: var(--accent); color: var(--accent-on-bright); border-top-right-radius: 2px; text-align: left; }
.chat-widget__form { padding: 12px 14px 10px; border-top: 1px solid rgba(0,0,0,.1); background: #fff; }
.chat-widget__form input[type="text"] { width: 100%; margin-bottom: 8px; padding: 8px 10px; border: 1px solid rgba(0,0,0,.15); border-radius: 6px; font-size: 13px; }
.chat-widget__input { display: flex; gap: 8px; align-items: flex-end; }
.chat-widget__input textarea { flex: 1 1 auto; resize: none; padding: 8px 10px; border: 1px solid rgba(0,0,0,.15); border-radius: 6px; font-size: 14px; font-family: inherit; line-height: 1.5; }
.chat-widget__input button { flex: 0 0 auto; padding: 9px 16px; border: 0; border-radius: 6px; background: var(--accent); color: var(--accent-on-bright); cursor: pointer; font-size: 14px; }
.chat-widget__status { min-height: 16px; margin: 6px 0 0; color: #b3261e; font-size: 12px; }
.chat-widget__privacy { margin: 4px 0 0; color: #777777; font-size: 11px; }
.chat-widget__privacy a { color: var(--accent); text-decoration: underline; }
.capture-mode .chat-widget { display: none; }
@media (max-width: 900px) {
    .chat-widget { right: 12px; bottom: calc(12px + env(safe-area-inset-bottom, 0px)); }
    .chat-widget__panel { position: fixed; right: 0; bottom: 0; left: 0; width: 100%; max-height: 72vh; border-radius: 14px 14px 0 0; }
}

/* v13.7 桌面端聊天入口收口到右侧悬浮「在线咨询」，移动端保留组件内 toggle 作为唯一底部入口 */
@media (min-width: 901px) {
    .chat-widget__toggle { display: none; }
}

@media (max-width: 900px) {
    .hero__device-stage { top: auto; right: -8%; bottom: 8%; width: 64vw; height: 46%; opacity: .32; }
    .hero-device--primary { inset: 0 0 0 auto; width: 72%; height: 100%; }
    .hero-device--secondary, .hero-device--tertiary { display: none; }
    .hero__content { z-index: 2; }
    .hero h1 { max-width: 92%; font-size: clamp(42px, 12vw, 62px); }
}

@media (max-width: 640px) {
    .hero__device-stage { right: -20%; width: 82vw; opacity: .23; }
}