:root {
  --ink: #101114;
  --muted: #666b74;
  --line: rgba(16, 17, 20, 0.1);
  --blue: #0071e3;
  --blue-dark: #0057b8;
  --blue-soft: #eaf4ff;
  --surface: #f5f5f7;
  --white: #ffffff;
  --success: #087a5b;
  --radius: 30px;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.09);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.nav-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.narrow { width: min(calc(100% - 40px), 860px); margin-inline: auto; }
.section { padding: 88px 0; }
.section-compact { padding: 56px 0; }
.surface { background: var(--surface); }
.dark { color: #fff; background: #0b0c0f; }
.center { text-align: center; }
.eyebrow {
  margin: 0 0 18px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.dark .eyebrow { color: #6db7ff; }
.display {
  max-width: 930px;
  margin: 0 auto;
  font-size: clamp(44px, 6.8vw, 78px);
  line-height: 0.98;
  letter-spacing: -0.06em;
  text-wrap: balance;
}
.headline {
  max-width: 820px;
  margin: 0;
  font-size: clamp(34px, 4.4vw, 56px);
  line-height: 1.03;
  letter-spacing: -0.05em;
  text-wrap: balance;
}
.headline.centered { margin-inline: auto; }
.subheadline {
  max-width: 760px;
  margin: 24px auto 0;
  color: var(--muted);
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.65;
  text-wrap: balance;
}
.dark .subheadline { color: #b7bbc4; }
.section-copy {
  max-width: 720px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}
.gradient-text {
  background: linear-gradient(100deg, #0071e3 10%, #7357ff 50%, #00a6a6 95%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 34px;
}
.actions.left { justify-content: flex-start; }
.btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 650;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { color: #fff; background: var(--blue); }
.btn-primary:hover { background: var(--blue-dark); }
.btn-ghost { border-color: rgba(0, 113, 227, .35); color: var(--blue); background: #fff; }
.btn-dark { color: #111; background: #fff; }
.btn-light { color: #fff; border-color: rgba(255,255,255,.28); background: rgba(255,255,255,.08); }
.text-link { color: var(--blue); font-weight: 650; }
.text-link::after { content: " →"; }

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid rgba(16, 17, 20, .06);
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(180%) blur(20px);
}
.nav {
  display: flex;
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 760;
  letter-spacing: -.02em;
}
.brand-logo {
  width: auto;
  height: 30px;
  object-fit: contain;
}
.footer-logo {
  height: 34px;
}
.footer-logo-link {
  display: inline-flex;
}
.brand-mark {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border-radius: 9px;
  color: #fff;
  background: #111;
  font-size: 12px;
  letter-spacing: -.04em;
}
.nav-links { display: flex; align-items: center; gap: 20px; }
.nav-links a { color: #2d3036; font-size: 14px; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--blue); }
.nav-cta {
  padding: 9px 15px;
  border-radius: 999px;
  color: #fff !important;
  background: var(--blue);
}
.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 50%;
  background: transparent;
}
.menu-button span,
.menu-button::before {
  content: "";
  display: block;
  width: 19px;
  height: 1.5px;
  margin: 5px auto;
  background: #111;
  transition: transform .2s ease;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 92px 0 84px;
  background:
    radial-gradient(circle at 78% 38%, rgba(78, 155, 255, .16), transparent 28%),
    radial-gradient(circle at 12% 22%, rgba(121, 91, 255, .08), transparent 24%),
    #fff;
}
.hero-grid {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  align-items: center;
  gap: 64px;
}
.hero-copy .display {
  margin: 0;
  font-size: clamp(48px, 6.1vw, 72px);
}
.hero-copy .subheadline {
  margin: 26px 0 0;
  font-size: 20px;
}
.hero-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  padding: 8px 13px;
  border: 1px solid rgba(0, 113, 227, .16);
  border-radius: 999px;
  color: #205c99;
  background: rgba(239, 247, 255, .8);
  font-size: 13px;
  font-weight: 650;
}
.hero-note::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #17a673;
  box-shadow: 0 0 0 4px rgba(23,166,115,.12);
}
.hero-commerce-visual {
  position: relative;
  min-height: 480px;
  overflow: hidden;
  border-radius: 42px;
  color: #fff;
  background:
    linear-gradient(145deg, rgba(255,255,255,.08), transparent 42%),
    #0c0d11;
  box-shadow: 0 38px 90px rgba(15,23,42,.2);
}
.hero-visual-glow {
  position: absolute;
  width: 440px;
  height: 440px;
  right: -140px;
  bottom: -180px;
  border-radius: 50%;
  background: rgba(0,113,227,.58);
  filter: blur(70px);
}
.storefront-panel,
.erp-panel {
  position: absolute;
  z-index: 2;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(28,31,39,.86);
  box-shadow: 0 26px 52px rgba(0,0,0,.32);
  backdrop-filter: blur(18px);
}
.storefront-panel {
  width: 230px;
  top: 82px;
  left: 50px;
  padding: 20px;
  border-radius: 30px;
  transform: rotate(-4deg);
}
.erp-panel {
  width: 330px;
  right: 38px;
  bottom: 64px;
  padding: 24px;
  border-radius: 26px;
  transform: rotate(2deg);
}
.mock-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255,255,255,.1);
  color: #cdd2dc;
  font-size: 12px;
  font-weight: 700;
}
.mock-top i { width: 7px; height: 7px; border-radius: 50%; background: #5bb6ff; box-shadow: 0 0 0 5px rgba(91,182,255,.1); }
.mock-product {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 4px 12px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.mock-product b { grid-row: 1 / 3; width: 42px; height: 50px; border-radius: 12px; background: linear-gradient(145deg, #6d66ff, #0071e3); }
.mock-product:nth-child(3) b { background: linear-gradient(145deg, #ff9a62, #ff5e77); }
.mock-product span { color: #d7dbe3; font-size: 12px; }
.mock-product strong { font-size: 17px; }
.mock-metric { display: flex; align-items: end; justify-content: space-between; padding: 22px 0 12px; }
.mock-metric span { color: #9da3ae; font-size: 12px; }
.mock-metric strong { font-size: 36px; letter-spacing: -.05em; }
.mock-bars { display: flex; height: 76px; align-items: end; gap: 10px; padding: 4px 0 14px; }
.mock-bars i { flex: 1; border-radius: 6px 6px 2px 2px; background: linear-gradient(#5bb6ff, #1268df); }
.mock-bars i:nth-child(1) { height: 32%; }
.mock-bars i:nth-child(2) { height: 58%; }
.mock-bars i:nth-child(3) { height: 44%; }
.mock-bars i:nth-child(4) { height: 82%; }
.mock-bars i:nth-child(5) { height: 66%; }
.mock-status { display: flex; justify-content: space-between; padding-top: 13px; border-top: 1px solid rgba(255,255,255,.1); color: #a6acb6; font-size: 12px; }
.mock-status b { color: #66d6ad; }
.sync-pill {
  position: absolute;
  z-index: 4;
  top: 258px;
  left: 198px;
  padding: 10px 14px;
  border: 1px solid rgba(109,183,255,.4);
  border-radius: 999px;
  color: #d9ecff;
  background: rgba(0,113,227,.34);
  box-shadow: 0 12px 40px rgba(0,113,227,.24);
  backdrop-filter: blur(12px);
  font-size: 11px;
  font-weight: 700;
}
.visual-caption {
  position: absolute;
  top: 34px;
  left: 38px;
  color: rgba(255,255,255,.38);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.trust-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
}
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.trust-item { padding: 30px 24px; border-right: 1px solid var(--line); }
.trust-item:last-child { border: 0; }
.trust-item strong { display: block; font-size: 19px; letter-spacing: -.02em; }
.trust-item span { display: block; margin-top: 6px; color: var(--muted); font-size: 13px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 12px 34px rgba(15,23,42,.045);
}
.card-pad { padding: 32px; }
.card h3 { margin: 0; font-size: 23px; letter-spacing: -.03em; }
.card p { margin: 16px 0 0; color: var(--muted); line-height: 1.7; }
.icon {
  display: grid;
  width: 46px;
  height: 46px;
  margin-bottom: 34px;
  place-items: center;
  border-radius: 14px;
  color: var(--blue);
  background: var(--blue-soft);
  font-size: 20px;
  font-weight: 760;
}
.advantage-grid { margin-top: 52px; }
.advantage-card { min-height: 330px; }
.advantage-card:nth-child(2) { background: #111; color: #fff; }
.advantage-card:nth-child(2) p { color: #aeb2bb; }
.advantage-card:nth-child(2) .icon { color: #fff; background: #2c2e34; }
.metric {
  display: block;
  margin-top: 44px;
  font-size: clamp(30px, 3.4vw, 44px);
  font-weight: 720;
  letter-spacing: -.05em;
}
.metric-label { display: block; color: var(--muted); font-size: 13px; }

.split {
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  align-items: start;
  gap: 72px;
}
.sticky-copy { position: sticky; top: 100px; }
.feature-list { display: grid; gap: 14px; }
.feature {
  padding: 28px 30px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #fff;
}
.feature-number { color: var(--blue); font-size: 12px; font-weight: 750; }
.feature h3 { margin: 14px 0 0; font-size: 22px; letter-spacing: -.03em; }
.feature p { margin: 10px 0 0; color: var(--muted); line-height: 1.7; }

.price-grid { margin-top: 50px; }
.price-card { position: relative; padding: 36px; }
.price-card.featured { color: #fff; border-color: #111; background: #111; transform: translateY(-10px); }
.price-card.featured p, .price-card.featured li { color: #b8bcc5; }
.price-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  padding: 7px 10px;
  border-radius: 999px;
  color: var(--blue);
  background: var(--blue-soft);
  font-size: 12px;
  font-weight: 700;
}
.price-name { font-size: 20px; font-weight: 700; }
.price { margin: 24px 0 8px; font-size: 32px; font-weight: 760; letter-spacing: -.045em; }
.price small { font-size: 14px; font-weight: 500; letter-spacing: 0; }
.price-card ul { min-height: 190px; margin: 26px 0 30px; padding: 0; list-style: none; }
.price-card li { position: relative; margin: 12px 0; padding-left: 22px; color: var(--muted); line-height: 1.55; }
.price-card li::before { content: "✓"; position: absolute; left: 0; color: var(--success); font-weight: 700; }
.price-footnote { margin-top: 28px; color: var(--muted); font-size: 13px; line-height: 1.7; text-align: center; }

.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 50px; }
.case-card { transition: transform .25s ease, box-shadow .25s ease; }
.case-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.case-image {
  aspect-ratio: 1.4;
  overflow: hidden;
  background: #e9ebef;
}
.case-image img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.case-card:hover img { transform: scale(1.025); }
.case-content { padding: 26px; }
.case-tag { color: var(--blue); font-size: 12px; font-weight: 730; letter-spacing: .06em; }
.case-content h3 { margin: 12px 0 0; font-size: 21px; line-height: 1.35; }
.case-content p { min-height: 48px; margin: 12px 0 22px; color: var(--muted); font-size: 14px; line-height: 1.65; }

.process { counter-reset: steps; margin-top: 50px; }
.process-item {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  gap: 34px;
  align-items: baseline;
  padding: 32px 0;
  border-top: 1px solid var(--line);
}
.process-item::before {
  counter-increment: steps;
  content: "0" counter(steps);
  color: var(--blue);
  font-size: 13px;
  font-weight: 750;
}
.process-item h3 { margin: 0; font-size: 25px; }
.process-item p { margin: 0; color: var(--muted); line-height: 1.7; }

.faq-list { display: grid; gap: 12px; margin-top: 44px; }
.faq-list details {
  padding: 0 26px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}
.faq-list summary {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  font-size: 17px;
  font-weight: 680;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; color: var(--blue); font-size: 24px; font-weight: 400; }
.faq-list details[open] summary::after { content: "−"; }
.faq-answer { max-width: 760px; padding: 0 0 24px; color: var(--muted); line-height: 1.8; }

.cta-band {
  position: relative;
  overflow: hidden;
  padding: 86px 40px;
  border-radius: 38px;
  color: #fff;
  background:
    radial-gradient(circle at 80% 20%, rgba(0,113,227,.62), transparent 32%),
    #0b0c0f;
}
.cta-band h2 { max-width: 760px; margin: 0; font-size: clamp(36px, 5vw, 56px); line-height: 1.05; letter-spacing: -.045em; }
.cta-band p { max-width: 650px; margin: 22px 0 0; color: #b4b8c1; font-size: 18px; line-height: 1.7; }

.page-hero { padding: 30px 0 60px; }
.page-banner {
  --banner-accent: #3f8cff;
  position: relative;
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  min-height: 410px;
  overflow: hidden;
  align-items: center;
  padding: 56px 62px;
  border-radius: 40px;
  color: #fff;
  background: linear-gradient(145deg, #101218, #090a0d);
  background:
    radial-gradient(circle at 88% 14%, color-mix(in srgb, var(--banner-accent) 36%, transparent), transparent 31%),
    linear-gradient(145deg, #101218, #090a0d);
  box-shadow: 0 34px 90px rgba(15,23,42,.15);
}
.page-banner-violet { --banner-accent: #795cff; }
.page-banner-cyan { --banner-accent: #00a9c8; }
.page-banner-green { --banner-accent: #12a77d; }
.page-banner-orange { --banner-accent: #f27c42; }
.page-banner-copy { position: relative; z-index: 3; }
.page-banner-copy .eyebrow { color: #8ec6ff; color: color-mix(in srgb, var(--banner-accent) 74%, white); }
.page-banner-copy h1 {
  max-width: 700px;
  margin: 0;
  font-size: clamp(40px, 4.8vw, 60px);
  line-height: 1.02;
  letter-spacing: -.055em;
  text-wrap: balance;
}
.page-banner-copy p:last-child {
  max-width: 650px;
  margin: 25px 0 0;
  color: #b7bcc6;
  font-size: 17px;
  line-height: 1.75;
}
.page-banner .gradient-text {
  background: none;
  color: #8ec6ff;
  color: color-mix(in srgb, var(--banner-accent) 72%, white);
  -webkit-text-fill-color: currentColor;
}
.page-banner-visual {
  position: relative;
  min-height: 290px;
}
.banner-glow {
  position: absolute;
  width: 310px;
  height: 310px;
  top: 5px;
  right: 0;
  border-radius: 50%;
  background: var(--banner-accent);
  opacity: .24;
  filter: blur(60px);
}
.banner-card {
  position: absolute;
  z-index: 2;
  display: flex;
  width: 220px;
  min-height: 110px;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 22px;
  background: rgba(31,34,42,.78);
  box-shadow: 0 24px 48px rgba(0,0,0,.28);
  backdrop-filter: blur(16px);
}
.banner-card span { color: #8ec6ff; color: color-mix(in srgb, var(--banner-accent) 72%, white); font-size: 11px; font-weight: 750; }
.banner-card strong { font-size: 22px; letter-spacing: -.03em; }
.banner-card-a { top: 10px; right: 75px; transform: rotate(3deg); }
.banner-card-b { top: 117px; right: 0; transform: rotate(-2deg); }
.banner-card-c { top: 218px; right: 102px; transform: rotate(2deg); }
.banner-line {
  position: absolute;
  top: 164px;
  right: 110px;
  width: 210px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--banner-accent), transparent);
  transform: rotate(29deg);
  box-shadow: 0 0 16px var(--banner-accent);
}
.breadcrumbs { margin-bottom: 22px; color: var(--muted); font-size: 13px; }
.breadcrumbs a { color: var(--blue); }
.detail-hero {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 60px;
  align-items: center;
  padding: 64px 0;
}
.case-banner {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 82% 18%, rgba(0,113,227,.14), transparent 30%),
    linear-gradient(180deg, #f6f8fb, #fff);
}
.detail-hero h1 { margin: 12px 0 0; font-size: clamp(38px, 5vw, 58px); line-height: 1.04; letter-spacing: -.045em; }
.detail-hero p { margin: 24px 0 0; color: var(--muted); font-size: 18px; line-height: 1.8; }
.detail-visual { overflow: hidden; border-radius: 28px; box-shadow: var(--shadow); }
.detail-visual img { width: 100%; }
.fact-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 34px; }
.fact { padding: 16px; border-radius: 16px; background: var(--surface); }
.fact span { display: block; color: var(--muted); font-size: 12px; }
.fact strong { display: block; margin-top: 6px; font-size: 15px; }
.content-prose { color: #33363c; font-size: 18px; line-height: 1.9; }
.content-prose h2 { margin: 48px 0 16px; color: var(--ink); font-size: 30px; line-height: 1.25; letter-spacing: -.03em; }
.content-prose h2:first-child { margin-top: 0; }
.content-prose ul { padding-left: 22px; }
.content-prose li { margin: 9px 0; }
.case-notice { padding: 20px 22px; border-radius: 16px; color: #36526e; background: #eff7ff; font-size: 14px; line-height: 1.7; }

.contact-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 70px; }
.contact-list { display: grid; gap: 16px; margin-top: 34px; }
.contact-line { padding: 20px 0; border-top: 1px solid var(--line); }
.contact-line span { display: block; color: var(--muted); font-size: 13px; }
.contact-line strong { display: block; margin-top: 8px; font-size: 18px; }
.copy-link {
  margin-top: 9px;
  padding: 0;
  border: 0;
  color: var(--blue);
  background: transparent;
  font-size: 13px;
  font-weight: 650;
  cursor: pointer;
}
.wechat-card {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 30px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
}
.wechat-card img {
  width: 104px;
  height: 104px;
  border-radius: 12px;
}
.wechat-card strong,
.wechat-card span,
.wechat-card small { display: block; }
.wechat-card span { margin-top: 7px; color: var(--muted); font-size: 14px; }
.wechat-card small { margin-top: 8px; color: #8a8f98; line-height: 1.5; }
.contact-form { padding: 40px; border: 1px solid var(--line); border-radius: 28px; background: #fff; box-shadow: var(--shadow); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field.full { grid-column: 1 / -1; }
.field label { display: block; margin-bottom: 8px; font-size: 13px; font-weight: 650; }
.field input, .field select, .field textarea {
  width: 100%;
  min-height: 50px;
  padding: 12px 14px;
  border: 1px solid #d6d9df;
  border-radius: 12px;
  color: var(--ink);
  background: #fff;
  outline: none;
}
.field textarea { min-height: 138px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(0,113,227,.1); }
.form-note { margin: 16px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.form-status { min-height: 22px; margin-top: 14px; color: var(--success); font-size: 14px; }
.generated-summary {
  width: 100%;
  min-height: 190px;
  margin-top: 12px;
  padding: 14px;
  border: 1px solid #d6d9df;
  border-radius: 12px;
  color: #32353b;
  background: var(--surface);
  line-height: 1.65;
  resize: vertical;
}
.generated-summary[hidden] { display: none; }

.site-footer { padding: 74px 0 28px; color: #c8cbd2; background: #111216; }
.footer-grid { display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 48px; }
.footer-brand p { max-width: 360px; margin: 18px 0 0; color: #888e99; line-height: 1.7; }
.credential-pill {
  display: inline-flex;
  margin-top: 18px;
  padding: 7px 10px;
  border: 1px solid rgba(109,183,255,.26);
  border-radius: 999px;
  color: #8dc7ff;
  background: rgba(0,113,227,.09);
  font-size: 11px;
  font-weight: 650;
}
.footer-title { margin-bottom: 18px; color: #fff; font-size: 14px; font-weight: 700; }
.footer-links { display: grid; gap: 12px; color: #9ca1ab; font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,.1);
  color: #777c85;
  font-size: 12px;
}
.footer-bottom a:hover { color: #fff; }

.skip-link {
  position: fixed; z-index: 200; top: 10px; left: 10px;
  padding: 10px 14px; border-radius: 8px;
  color: #fff; background: #111;
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }
.mobile-contact-bar { display: none; }

.not-found {
  display: grid;
  min-height: 68vh;
  padding: 110px 0;
  place-items: center;
  text-align: center;
}
.not-found .container { max-width: 760px; }
.not-found h1 {
  margin: 14px 0 20px;
  font-size: clamp(44px, 7vw, 78px);
  letter-spacing: -.055em;
}
.not-found p:not(.eyebrow) {
  max-width: 640px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.8;
}

@media (max-width: 900px) {
  .section { padding: 70px 0; }
  .nav-links {
    position: fixed;
    inset: 64px 0 auto;
    display: none;
    min-height: calc(100vh - 64px);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 24px;
    background: rgba(255,255,255,.98);
  }
  .nav-open .nav-links { display: flex; }
  .nav-links a { padding: 17px 8px; border-bottom: 1px solid var(--line); font-size: 18px; }
  .nav-cta { margin-top: 18px; text-align: center; }
  .menu-button { display: block; }
  .grid-3, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-grid, .page-banner { grid-template-columns: 1fr; }
  .hero-copy { max-width: 760px; }
  .hero-commerce-visual { min-height: 460px; }
  .page-banner { padding: 48px; }
  .page-banner-visual { min-height: 310px; margin-top: 18px; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-item:nth-child(2) { border-right: 0; }
  .trust-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .split, .detail-hero, .contact-layout { grid-template-columns: 1fr; }
  .sticky-copy { position: static; }
  .price-card.featured { transform: none; }
  .process-item { grid-template-columns: 50px 1fr; }
  .process-item p { grid-column: 2; }
  .footer-grid { grid-template-columns: 1.5fr 1fr 1fr; }
  .footer-grid > div:last-child { grid-column: 1 / -1; }
}

@media (max-width: 620px) {
  body { padding-bottom: 66px; }
  .container, .narrow { width: min(calc(100% - 28px), var(--max)); }
  .hero { padding: 60px 0 58px; }
  .display { font-size: 47px; }
  .hero-copy .display { font-size: 44px; }
  .hero-copy .subheadline { font-size: 18px; }
  .brand-logo { height: 27px; }
  .headline { font-size: 34px; }
  .grid-3, .grid-2, .case-grid, .trust-grid, .fact-row, .form-grid { grid-template-columns: 1fr; }
  .hero-grid { gap: 40px; }
  .hero-commerce-visual { min-height: 420px; border-radius: 28px; }
  .storefront-panel { width: 176px; top: 68px; left: 18px; padding: 15px; border-radius: 23px; }
  .erp-panel { width: 242px; right: 14px; bottom: 42px; padding: 18px; border-radius: 21px; }
  .sync-pill { top: 218px; left: 102px; font-size: 9px; }
  .visual-caption { top: 24px; left: 24px; }
  .mock-product { grid-template-columns: 34px 1fr; gap: 3px 9px; padding: 12px 0; }
  .mock-product b { width: 34px; height: 40px; }
  .mock-product strong { font-size: 14px; }
  .mock-metric { padding: 16px 0 10px; }
  .mock-metric strong { font-size: 28px; }
  .mock-bars { height: 60px; }
  .page-hero { padding: 20px 0 54px; }
  .page-banner { min-height: 610px; padding: 40px 28px 28px; border-radius: 28px; }
  .page-banner-copy h1 { font-size: 38px; }
  .page-banner-copy p:last-child { font-size: 16px; }
  .page-banner-visual { min-height: 285px; margin-top: 12px; }
  .banner-card { width: 168px; min-height: 88px; padding: 16px; border-radius: 18px; }
  .banner-card strong { font-size: 18px; }
  .banner-card-a { top: 0; right: 36px; }
  .banner-card-b { top: 88px; right: 0; }
  .banner-card-c { top: 176px; right: 52px; }
  .banner-line { top: 128px; right: 54px; width: 170px; }
  .trust-item { border-right: 0; border-bottom: 1px solid var(--line); }
  .card-pad, .price-card, .contact-form { padding: 28px; }
  .advantage-card { min-height: 320px; }
  .process-item { grid-template-columns: 40px 1fr; gap: 14px; }
  .cta-band { padding: 58px 26px; border-radius: 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-grid > div:last-child { grid-column: auto; }
  .footer-bottom { flex-direction: column; }
  .wechat-card { align-items: flex-start; }
  .wechat-card img { width: 88px; height: 88px; }
  .mobile-contact-bar {
    position: fixed;
    z-index: 120;
    right: 12px;
    bottom: 10px;
    left: 12px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    overflow: hidden;
    min-height: 52px;
    border: 1px solid rgba(16,17,20,.1);
    border-radius: 999px;
    background: rgba(255,255,255,.94);
    box-shadow: 0 10px 35px rgba(15,23,42,.17);
    backdrop-filter: saturate(180%) blur(18px);
  }
  .mobile-contact-bar a,
  .mobile-contact-bar button {
    display: grid;
    place-items: center;
    border: 0;
    color: #fff;
    background: var(--blue);
    font-size: 15px;
    font-weight: 700;
  }
  .mobile-contact-bar button {
    color: var(--blue);
    background: transparent;
    cursor: pointer;
  }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}