:root {
  --ink: #10283b;
  --ink-soft: #25445a;
  --muted: #63798a;
  --line: #dce8ee;
  --surface: #ffffff;
  --soft: #f3f8fa;
  --paper: #fffdf8;
  --cyan: #0ab7d4;
  --teal: #078d91;
  --blue: #2563eb;
  --violet: #7c3aed;
  --coral: #ff6652;
  --yellow: #f5bd36;
  --green: #2a9d68;
  --footer: #102d3d;
  --shadow: 0 18px 45px rgba(25, 69, 90, 0.12);
  --shell: 1200px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}
body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; letter-spacing: 0; }
button { color: inherit; }
[hidden] { display: none !important; }

.shell { width: min(calc(100% - 40px), var(--shell)); margin-inline: auto; }
.section-pad { padding: 92px 0; }
.section-soft { background: var(--soft); }
.eyebrow {
  margin: 0 0 10px;
  color: var(--teal);
  font-size: 14px;
  font-weight: 800;
}
.section-heading { max-width: 720px; margin-bottom: 38px; }
.section-heading.is-centered { margin-inline: auto; text-align: center; }
.section-heading h2 { margin: 0; font-size: 38px; line-height: 1.25; }
.section-heading p { margin: 14px 0 0; color: var(--muted); font-size: 17px; }
.section-heading-row { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 34px; }
.section-heading-row .section-heading { margin: 0; }

.top-strip { background: var(--footer); color: #dcecf3; font-size: 13px; }
.top-strip .shell { min-height: 34px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.top-strip a:hover { color: #fff; }
.site-header { position: sticky; top: 0; z-index: 40; background: rgba(255, 255, 255, 0.96); border-bottom: 1px solid rgba(220, 232, 238, 0.9); backdrop-filter: blur(12px); }
.header-inner { min-height: 78px; display: grid; grid-template-columns: 210px 1fr auto; align-items: center; gap: 30px; }
.brand { display: inline-flex; align-items: center; width: fit-content; }
.brand img { width: 168px; height: 62px; object-fit: contain; }
.desktop-nav { display: flex; align-items: center; justify-content: center; gap: 8px; }
.desktop-nav a { padding: 10px 16px; border-radius: 6px; color: var(--ink-soft); font-size: 15px; font-weight: 700; transition: color .2s ease, background .2s ease; }
.desktop-nav a:hover, .desktop-nav a.is-current { color: var(--teal); background: #eaf8fa; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.menu-button { display: none; width: 44px; height: 44px; border: 1px solid var(--line); background: #fff; border-radius: 6px; align-items: center; justify-content: center; cursor: pointer; }
.mobile-menu { position: fixed; inset: 112px 0 auto; padding: 16px 20px 24px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); }
.mobile-menu a { display: block; padding: 14px 4px; border-bottom: 1px solid var(--line); font-weight: 700; }

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 7px;
  cursor: pointer;
  font-weight: 800;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--teal); box-shadow: 0 10px 24px rgba(7, 141, 145, 0.22); }
.button-primary:hover { background: #06797d; }
.button-accent { color: #fff; background: var(--coral); box-shadow: 0 10px 24px rgba(255, 102, 82, 0.24); }
.button-accent:hover { background: #eb5543; }
.button-light { color: var(--teal); background: #fff; }
.button-outline { color: var(--teal); border-color: #86d6dd; background: transparent; }
.button-ghost { color: var(--ink); border-color: rgba(16, 40, 59, 0.24); background: rgba(255, 255, 255, 0.72); }
.button-small { min-height: 40px; padding-inline: 17px; font-size: 14px; }
.button svg { width: 18px; height: 18px; }
.text-link { color: var(--teal); font-weight: 800; }
.text-link:hover { color: var(--coral); }

.hero { min-height: 560px; position: relative; display: flex; align-items: center; overflow: hidden; background: url('../img/hero-kdd.webp') center center / cover no-repeat; }
.hero::after { content: ""; position: absolute; inset: 0 auto 0 0; width: 57%; background: rgba(255, 255, 255, 0.28); pointer-events: none; }
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 560px) 1fr; align-items: center; }
.hero-copy { padding: 70px 0; }
.hero-kicker { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 20px; color: var(--teal); font-weight: 900; }
.hero-kicker::before { content: ""; width: 32px; height: 3px; background: var(--coral); }
.hero h1 { margin: 0; font-size: 72px; line-height: 1.05; }
.hero-lead { margin: 18px 0 0; font-size: 28px; font-weight: 900; color: var(--ink-soft); }
.hero-description { max-width: 520px; margin: 18px 0 0; color: #476174; font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-facts { display: flex; flex-wrap: wrap; gap: 26px; margin: 38px 0 0; }
.hero-facts div { min-width: 126px; padding-left: 14px; border-left: 3px solid var(--cyan); }
.hero-facts dt { font-size: 20px; font-weight: 900; }
.hero-facts dd { margin: 0; color: var(--muted); font-size: 13px; }

.operator-band { border-block: 1px solid var(--line); background: #fff; }
.operator-band .shell { min-height: 108px; display: grid; grid-template-columns: 230px 1fr; align-items: center; gap: 34px; }
.operator-copy strong { display: block; font-size: 18px; }
.operator-copy span { color: var(--muted); font-size: 13px; }
.operator-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.operator-item { min-height: 56px; display: flex; align-items: center; justify-content: center; padding: 8px 14px; border-left: 1px solid var(--line); }
.operator-item img { width: 150px; height: 46px; object-fit: contain; filter: grayscale(.4); opacity: .72; transition: filter .2s ease, opacity .2s ease, transform .2s ease; }
.operator-item:hover img { filter: grayscale(0); opacity: 1; transform: translateY(-3px); }

.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.feature-item { min-height: 244px; padding: 30px; border: 1px solid var(--line); border-top: 4px solid var(--cyan); background: #fff; transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease; }
.feature-item:nth-child(2) { border-top-color: var(--green); }
.feature-item:nth-child(3) { border-top-color: var(--coral); }
.feature-item:nth-child(4) { border-top-color: var(--yellow); }
.feature-item:nth-child(5) { border-top-color: var(--violet); }
.feature-item:nth-child(6) { border-top-color: var(--blue); }
.feature-item:hover { transform: translateY(-7px); box-shadow: var(--shadow); border-color: transparent; }
.feature-icon { width: 54px; height: 54px; display: grid; place-items: center; margin-bottom: 24px; color: var(--teal); background: #e5f8f8; border-radius: 50%; transition: transform .22s ease; }
.feature-item:hover .feature-icon { transform: scale(1.08) rotate(-3deg); }
.feature-icon svg { width: 26px; height: 26px; }
.feature-item h3 { margin: 0; font-size: 21px; }
.feature-item p { margin: 12px 0 0; color: var(--muted); }

.catalog-toolbar { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-button { min-height: 40px; padding: 0 17px; border: 1px solid var(--line); border-radius: 6px; background: #fff; cursor: pointer; color: var(--ink-soft); font-weight: 800; }
.filter-button:hover, .filter-button.is-active { color: #fff; border-color: var(--teal); background: var(--teal); }
.product-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 22px; }
.product-card { min-width: 0; overflow: hidden; border: 1px solid var(--line); background: #fff; transition: transform .22s ease, box-shadow .22s ease; }
.product-card:hover { transform: translateY(-7px); box-shadow: var(--shadow); }
.product-media { position: relative; display: block; aspect-ratio: 1 / 1; overflow: hidden; background: #eff8fa; }
.product-media img { width: 100%; height: 100%; object-fit: contain; transition: transform .35s ease; }
.product-card:hover .product-media img { transform: scale(1.04); }
.operator-badge { position: absolute; top: 12px; left: 12px; padding: 4px 9px; border-radius: 5px; color: #fff; background: rgba(16, 40, 59, .86); font-size: 12px; font-weight: 900; }
.product-body { padding: 20px; }
.product-body h3 { margin: 0; font-size: 19px; line-height: 1.4; }
.product-summary { min-height: 48px; margin: 9px 0 0; color: var(--muted); font-size: 14px; }
.product-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin: 18px 0; padding: 13px 0; border-block: 1px solid var(--line); text-align: center; }
.product-metrics strong { display: block; color: var(--teal); font-size: 17px; }
.product-metrics span { display: block; color: var(--muted); font-size: 11px; }
.product-note { min-height: 36px; margin: 0 0 14px; color: var(--muted); font-size: 12px; }
.product-action { display: inline-flex; align-items: center; gap: 7px; color: var(--blue); font-size: 14px; font-weight: 900; }
.product-action:hover { color: var(--coral); }
.catalog-disclaimer { margin: 28px 0 0; padding: 16px 18px; border-left: 4px solid var(--yellow); background: #fff9e9; color: #6b5b36; font-size: 14px; }
.catalog-more { margin-top: 30px; text-align: center; }

.advantage-band { color: #fff; background: var(--footer); }
.advantage-band .section-heading p, .advantage-band .eyebrow { color: #b9d5df; }
.advantage-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid rgba(255, 255, 255, .16); }
.advantage-item { min-height: 250px; padding: 32px; border-right: 1px solid rgba(255, 255, 255, .16); background: transparent; transition: background .2s ease, transform .2s ease; }
.advantage-item:last-child { border-right: 0; }
.advantage-item:hover { background: rgba(255, 255, 255, .07); transform: translateY(-5px); }
.advantage-number { color: #65d9e6; font-size: 32px; font-weight: 900; }
.advantage-item h3 { margin: 20px 0 0; font-size: 21px; }
.advantage-item p { margin: 12px 0 0; color: #c6dbe3; font-size: 14px; }

.knowledge-preview-grid { display: grid; grid-template-columns: 1.2fr .9fr .9fr; gap: 22px; }
.knowledge-preview-card { min-height: 390px; position: relative; overflow: hidden; display: flex; align-items: end; color: #fff; background: var(--footer); }
.knowledge-preview-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.knowledge-preview-card::after { content: ""; position: absolute; inset: 32% 0 0; background: rgba(16, 40, 59, .82); }
.knowledge-preview-card:hover img { transform: scale(1.04); }
.knowledge-preview-copy { position: relative; z-index: 1; padding: 28px; }
.knowledge-preview-copy span { font-size: 13px; font-weight: 900; color: #9ce9ed; }
.knowledge-preview-copy h3 { margin: 9px 0 0; font-size: 24px; line-height: 1.4; }
.knowledge-preview-copy p { margin: 10px 0 0; color: #d6e8ee; font-size: 14px; }

.faq-grid { display: grid; grid-template-columns: 360px minmax(0, 1fr); gap: 72px; align-items: start; }
.faq-intro h2 { margin: 0; font-size: 38px; line-height: 1.3; }
.faq-intro p { color: var(--muted); }
.faq-item { border-top: 1px solid var(--line); }
.faq-item:last-child { border-bottom: 1px solid var(--line); }
.faq-question { width: 100%; min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 0; border: 0; background: transparent; cursor: pointer; text-align: left; font-weight: 900; }
.faq-question svg { width: 19px; transition: transform .2s ease; }
.faq-item.is-open .faq-question svg { transform: rotate(45deg); }
.faq-answer { padding: 0 38px 23px 0; color: var(--muted); }

.partner-section { padding: 62px 0; border-top: 1px solid var(--line); }
.partner-title { margin: 0 0 26px; text-align: center; font-size: 28px; }
.partner-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; }
.partner-logo { min-height: 76px; display: grid; place-items: center; border: 1px solid var(--line); background: #fff; }
.partner-logo img { width: 160px; height: 48px; object-fit: contain; filter: grayscale(.65); opacity: .68; transition: filter .2s ease, opacity .2s ease, transform .2s ease; }
.partner-logo:hover img { filter: grayscale(0); opacity: 1; transform: translateY(-3px); }

.final-cta { padding: 72px 0; color: #fff; background: var(--teal); }
.final-cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 34px; }
.final-cta h2 { margin: 0; font-size: 36px; }
.final-cta p { margin: 10px 0 0; color: #d9f5f4; }
.final-cta-actions { display: flex; flex-wrap: wrap; gap: 10px; }

.site-footer { color: #d4e3e9; background: var(--footer); padding: 68px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.7fr .7fr .8fr 1fr; gap: 54px; }
.footer-brand { padding-right: 24px; }
.footer-brand img { width: 188px; height: 72px; object-fit: contain; object-position: left center; }
.footer-brand p { margin: 22px 0 0; color: #bed1d8; font-size: 15px; line-height: 1.9; }
.footer-column h2 { margin: 0 0 20px; color: #fff; font-size: 17px; }
.footer-links { display: grid; gap: 10px; }
.footer-links a { color: #c5d8df; font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-bottom { margin-top: 44px; padding-top: 23px; border-top: 1px solid rgba(255, 255, 255, .12); display: flex; justify-content: space-between; gap: 20px; color: #9fb9c3; font-size: 13px; }

.mobile-bottom-nav { display: none; }
.back-to-top { position: fixed; right: 24px; bottom: 24px; z-index: 25; width: 46px; height: 46px; display: grid; place-items: center; border: 0; border-radius: 50%; color: #fff; background: var(--teal); box-shadow: var(--shadow); opacity: 0; pointer-events: none; transform: translateY(10px); transition: opacity .2s ease, transform .2s ease; cursor: pointer; }
.back-to-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }

[data-reveal] { opacity: 0; transform: translateY(22px); transition: opacity .55s ease, transform .55s ease; }
[data-reveal].is-visible { opacity: 1; transform: none; }
.hero-copy[data-reveal] { opacity: 1; transform: none; }

/* Industry knowledge */
.page-hero { padding: 60px 0 72px; background: var(--soft); }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--teal); font-weight: 800; }
.industry-hero-grid { display: grid; grid-template-columns: 1.6fr .85fr; gap: 20px; }
.feature-story, .side-story { position: relative; overflow: hidden; color: #fff; background: var(--footer); }
.feature-story { min-height: 470px; }
.side-story { min-height: 225px; }
.story-side-grid { display: grid; gap: 20px; }
.feature-story img, .side-story img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.feature-story::after, .side-story::after { content: ""; position: absolute; inset: 35% 0 0; background: rgba(16, 40, 59, .84); }
.feature-story:hover img, .side-story:hover img { transform: scale(1.035); }
.story-copy { position: absolute; z-index: 1; inset: auto 0 0; padding: 30px; }
.story-copy span { font-size: 13px; font-weight: 900; color: #9ce9ed; }
.story-copy h1, .story-copy h2 { margin: 9px 0 0; line-height: 1.35; }
.story-copy h1 { font-size: 34px; }
.story-copy h2 { font-size: 20px; }
.story-copy p { margin: 10px 0 0; color: #d7e8ee; font-size: 14px; }

.industry-main { padding: 66px 0 100px; background: var(--soft); }
.industry-layout { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 28px; align-items: start; }
.industry-notice { display: flex; gap: 14px; margin-bottom: 18px; padding: 18px 20px; border-left: 4px solid var(--cyan); background: #fff; color: var(--muted); }
.industry-notice svg { flex: 0 0 auto; width: 20px; color: var(--teal); }
.industry-title-block { padding: 25px 26px; margin-bottom: 16px; background: #fff; border: 1px solid var(--line); }
.industry-title-block h1 { margin: 0; font-size: 28px; }
.industry-title-block p { margin: 8px 0 0; color: var(--muted); }
.knowledge-list { display: grid; gap: 14px; scroll-margin-top: 120px; }
.knowledge-list-card { display: grid; grid-template-columns: 220px minmax(0, 1fr); min-height: 190px; padding: 16px; background: #fff; border: 1px solid var(--line); transition: transform .2s ease, box-shadow .2s ease; }
.knowledge-list-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.knowledge-thumb { overflow: hidden; background: #eef7f7; }
.knowledge-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.knowledge-list-card:hover .knowledge-thumb img { transform: scale(1.04); }
.knowledge-card-body { min-width: 0; padding: 7px 12px 6px 22px; }
.knowledge-category { display: inline-flex; padding: 3px 9px; border-radius: 5px; color: var(--teal); background: #e8f7f8; font-size: 12px; font-weight: 900; }
.knowledge-card-body h2 { margin: 10px 0 0; font-size: 21px; line-height: 1.45; }
.knowledge-card-body h2 a:hover { color: var(--teal); }
.knowledge-card-body p { display: -webkit-box; overflow: hidden; margin: 9px 0 0; color: var(--muted); font-size: 14px; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.knowledge-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; color: #91a2ae; font-size: 12px; }
.knowledge-meta a { color: var(--blue); font-weight: 900; }
.industry-sidebar { position: sticky; top: 112px; display: grid; gap: 16px; }
.sidebar-block { padding: 23px; background: #fff; border: 1px solid var(--line); }
.sidebar-block h2 { margin: 0 0 18px; font-size: 18px; }
.sidebar-block h2::after { content: ""; display: block; width: 34px; height: 3px; margin-top: 9px; background: var(--coral); }
.search-row { display: grid; grid-template-columns: 1fr auto; gap: 8px; }
.search-row input, .page-jump input { width: 100%; min-width: 0; height: 42px; padding: 0 12px; border: 1px solid var(--line); border-radius: 5px; outline: none; }
.search-row input:focus, .page-jump input:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(10, 183, 212, .12); }
.search-row button, .page-jump button { border: 0; border-radius: 5px; color: #fff; background: var(--teal); cursor: pointer; font-weight: 900; }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-list a { padding: 5px 9px; border-radius: 5px; color: var(--teal); background: #eaf8fa; font-size: 12px; font-weight: 800; }
.sidebar-list { display: grid; gap: 11px; color: var(--muted); font-size: 14px; }
.sidebar-list a:hover { color: var(--teal); }
.sidebar-actions { display: grid; gap: 9px; }
.pagination-row { margin-top: 26px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px; }
.pagination { display: flex; align-items: center; gap: 8px; }
.page-numbers { display: flex; gap: 6px; }
.page-step, .page-number { min-width: 40px; height: 40px; padding: 0 12px; border: 1px solid var(--line); border-radius: 5px; background: #fff; cursor: pointer; font-weight: 800; }
.page-number.is-current { color: #fff; border-color: var(--teal); background: var(--teal); }
.page-step:disabled { opacity: .4; cursor: default; }
.page-jump { display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: 13px; }
.page-jump input { width: 64px; }
.page-jump button { height: 40px; padding: 0 13px; }

/* Article pages */
.article-hero { padding: 58px 0 66px; background: var(--soft); }
.article-hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr); align-items: center; gap: 54px; }
.article-hero h1 { margin: 0; font-size: 46px; line-height: 1.25; }
.article-hero p { margin: 18px 0 0; color: var(--muted); font-size: 17px; }
.article-hero-media { overflow: hidden; aspect-ratio: 3 / 2; box-shadow: var(--shadow); }
.article-hero-media img { width: 100%; height: 100%; object-fit: cover; }
.article-main { padding: 68px 0 100px; background: var(--soft); }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 30px; align-items: start; }
.article-body { padding: 46px 52px; background: #fff; border: 1px solid var(--line); }
.article-intro { margin: 0 0 36px; padding: 22px 24px; border-left: 4px solid var(--cyan); background: #eef9fa; color: var(--ink-soft); font-size: 17px; }
.article-body h2 { margin: 42px 0 14px; font-size: 27px; line-height: 1.4; }
.article-body h2:first-of-type { margin-top: 0; }
.article-body h3 { margin: 28px 0 10px; font-size: 21px; }
.article-body p { margin: 0 0 18px; color: #425d70; }
.article-body ul { margin: 0 0 22px; padding-left: 22px; color: #425d70; }
.article-body li { margin: 8px 0; }
.article-note { margin: 32px 0; padding: 20px 22px; border: 1px solid #f1d78f; background: #fff9e8; color: #6b5b36; }
.article-cta { margin-top: 44px; padding: 28px; background: #f0f7ff; border-left: 4px solid var(--blue); }
.article-cta h2 { margin: 0; font-size: 24px; }
.article-cta p { margin: 10px 0 20px; }
.article-cta-actions { display: flex; flex-wrap: wrap; gap: 9px; }

.simple-page { min-height: 60vh; display: grid; place-items: center; padding: 80px 20px; text-align: center; }
.simple-page h1 { margin: 0; font-size: 72px; }
.simple-page p { color: var(--muted); }

@media (max-width: 1100px) {
  .header-inner { grid-template-columns: 185px 1fr auto; gap: 16px; }
  .desktop-nav a { padding-inline: 10px; }
  .product-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .advantage-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .advantage-item:nth-child(2) { border-right: 0; }
  .advantage-item:nth-child(-n+2) { border-bottom: 1px solid rgba(255, 255, 255, .16); }
  .footer-grid { grid-template-columns: 1.5fr repeat(3, 1fr); gap: 34px; }
}

@media (max-width: 900px) {
  .top-strip .shell { justify-content: center; }
  .top-strip a { display: none; }
  .header-inner { grid-template-columns: 1fr auto auto; min-height: 72px; }
  .desktop-nav { display: none; }
  .menu-button { display: inline-flex; }
  .brand img { width: 146px; height: 56px; }
  .header-actions .button { display: none; }
  .hero { min-height: 600px; background-position: 62% center; }
  .hero::after { width: 100%; background: rgba(255, 255, 255, .72); }
  .hero-inner { grid-template-columns: minmax(0, 560px); }
  .hero h1 { font-size: 56px; }
  .operator-band .shell { grid-template-columns: 1fr; padding-block: 24px; }
  .operator-copy { text-align: center; }
  .operator-list { width: 100%; }
  .operator-item { border: 0; }
  .knowledge-preview-grid { grid-template-columns: 1fr 1fr; }
  .knowledge-preview-card:first-child { grid-column: 1 / -1; }
  .faq-grid { grid-template-columns: 1fr; gap: 30px; }
  .final-cta-inner { align-items: flex-start; flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .industry-hero-grid { grid-template-columns: 1fr; }
  .story-side-grid { grid-template-columns: 1fr 1fr; }
  .industry-layout, .article-layout { grid-template-columns: 1fr; }
  .industry-sidebar { position: static; grid-template-columns: 1fr 1fr; }
  .article-hero-grid { grid-template-columns: 1fr; }
  .article-hero-media { max-width: 720px; }
}

@media (max-width: 640px) {
  body { font-size: 15px; padding-bottom: 64px; }
  .shell { width: min(calc(100% - 28px), var(--shell)); }
  .section-pad { padding: 68px 0; }
  .section-heading h2, .faq-intro h2 { font-size: 30px; }
  .section-heading-row { align-items: flex-start; flex-direction: column; }
  .top-strip .shell { min-height: 30px; font-size: 11px; }
  .site-header { top: 0; }
  .header-inner { min-height: 66px; }
  .brand img { width: 128px; height: 50px; }
  .mobile-menu { inset: 96px 0 auto; }
  .hero { min-height: 590px; background-position: 69% center; }
  .hero-copy { padding: 58px 0 76px; }
  .hero h1 { font-size: 42px; }
  .hero-lead { font-size: 22px; }
  .hero-description { font-size: 16px; }
  .hero-actions { display: grid; grid-template-columns: 1fr 1fr; }
  .hero-actions .button { padding-inline: 12px; }
  .hero-facts { gap: 18px; }
  .operator-list { grid-template-columns: 1fr 1fr; gap: 8px; }
  .operator-item img { width: 126px; }
  .feature-grid, .product-grid, .knowledge-preview-grid { grid-template-columns: 1fr; }
  .knowledge-preview-card:first-child { grid-column: auto; }
  .product-card { display: block; }
  .product-media { aspect-ratio: 1 / 1; min-height: 0; }
  .product-body { padding: 16px; }
  .product-summary { min-height: auto; }
  .product-metrics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .advantage-grid { grid-template-columns: 1fr; }
  .advantage-item { border-right: 0; border-bottom: 1px solid rgba(255, 255, 255, .16); }
  .advantage-item:last-child { border-bottom: 0; }
  .partner-grid { grid-template-columns: 1fr 1fr; }
  .partner-logo img { width: 130px; }
  .final-cta h2 { font-size: 29px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { flex-direction: column; }
  .mobile-bottom-nav { position: fixed; inset: auto 0 0; z-index: 50; height: 64px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); background: rgba(255, 255, 255, .97); backdrop-filter: blur(12px); }
  .mobile-bottom-nav a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; color: var(--muted); font-size: 11px; }
  .mobile-bottom-nav a.is-primary { color: #fff; background: var(--teal); }
  .mobile-bottom-nav svg { width: 20px; height: 20px; }
  .back-to-top { right: 14px; bottom: 78px; }
  .page-hero { padding: 36px 0 50px; }
  .feature-story { min-height: 390px; }
  .story-side-grid { grid-template-columns: 1fr; }
  .side-story { min-height: 250px; }
  .story-copy h1 { font-size: 28px; }
  .industry-main { padding: 48px 0 76px; }
  .knowledge-list-card { grid-template-columns: 118px minmax(0, 1fr); min-height: 176px; padding: 10px; }
  .knowledge-card-body { padding: 3px 2px 3px 13px; }
  .knowledge-card-body h2 { font-size: 17px; }
  .knowledge-card-body p { font-size: 13px; -webkit-line-clamp: 2; }
  .knowledge-meta span { display: none; }
  .industry-sidebar { grid-template-columns: 1fr; }
  .pagination-row { align-items: flex-start; flex-direction: column; }
  .pagination { width: 100%; justify-content: space-between; }
  .page-step { padding-inline: 9px; }
  .article-hero { padding: 38px 0 48px; }
  .article-hero-grid { gap: 30px; }
  .article-hero h1 { font-size: 34px; }
  .article-hero-media { min-width: 0; }
  .article-main { padding: 42px 0 74px; }
  .article-body { padding: 30px 22px; }
  .article-body h2 { font-size: 23px; }
}

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