:root {
  --ink: #111315;
  --muted: #5d6268;
  --line: #dfe2e5;
  --soft-line: rgba(17, 19, 21, .09);
  --paper: #f5f6f7;
  --white: #fff;
  --blue: #0b2f62;
  --blue-2: #123f79;
  --gold: #c8963d;
  --green: #52786e;
  --radius: 24px;
  --shadow: 0 26px 70px rgba(17, 25, 35, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "SF Pro Display", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font: inherit; }

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  height: 76px;
  padding: 0 4vw;
  display: grid;
  grid-template-columns: 240px 1fr auto;
  align-items: center;
  gap: 30px;
  border-bottom: 1px solid rgba(17, 19, 21, .08);
  background: rgba(248, 249, 250, .91);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; width: 190px; align-items: center; }
.brand img { width: 100%; height: 56px; object-fit: contain; object-position: left center; }
.site-header nav { display: flex; justify-content: center; gap: clamp(16px, 2.4vw, 38px); }
.site-header nav a { position: relative; color: #4f5358; font-size: 14px; font-weight: 700; white-space: nowrap; }
.site-header nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -8px;
  height: 2px;
  background: var(--blue);
  transition: .25s ease;
}
.site-header nav a:hover { color: var(--blue); }
.site-header nav a:hover::after { right: 0; }
.header-cta {
  min-height: 42px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  color: #fff;
  background: var(--ink);
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
  transition: .25s ease;
}
.header-cta:hover { transform: translateY(-2px); background: var(--blue); }
.menu-button { display: none; }

.hero {
  position: relative;
  min-height: 760px;
  padding: clamp(80px, 9vw, 135px) 5vw 90px;
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(520px, 1.1fr);
  align-items: center;
  gap: clamp(46px, 6vw, 100px);
  overflow: hidden;
  background:
    linear-gradient(rgba(9, 12, 16, .028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(9, 12, 16, .028) 1px, transparent 1px),
    #f5f6f7;
  background-size: 48px 48px;
}
.hero::after {
  content: "";
  position: absolute;
  left: 5vw;
  right: 5vw;
  bottom: 0;
  height: 1px;
  background: var(--line);
}
.hero-glow { position: absolute; border-radius: 50%; filter: blur(2px); pointer-events: none; }
.hero-glow-one { width: 620px; height: 620px; right: -110px; top: 30px; background: radial-gradient(circle, rgba(37, 89, 145, .17), transparent 68%); }
.hero-glow-two { width: 420px; height: 420px; left: 22%; bottom: -230px; background: radial-gradient(circle, rgba(200, 150, 61, .13), transparent 70%); }
.hero-copy, .hero-demo { position: relative; z-index: 2; }
.eyebrow {
  margin: 0 0 22px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.eyebrow i { width: 32px; height: 2px; background: var(--gold); }
.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(48px, 5vw, 76px);
  line-height: 1.08;
  letter-spacing: -.055em;
}
.hero h1 em { color: var(--blue); font-style: normal; }
.hero-lead { max-width: 680px; margin: 28px 0 0; color: var(--muted); font-size: clamp(17px, 1.35vw, 20px); line-height: 1.8; }
.hero-actions { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 12px; }
.button {
  min-height: 54px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  cursor: pointer;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: var(--ink); box-shadow: 0 14px 30px rgba(17, 19, 21, .18); }
.button-primary:hover { background: var(--blue); box-shadow: 0 18px 36px rgba(11, 47, 98, .24); }
.button-secondary { border-color: #cfd3d7; background: rgba(255, 255, 255, .7); }
.button-secondary:hover { background: #fff; }
.hero-proof { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 14px 24px; color: #60656a; font-size: 12px; font-weight: 700; }
.hero-proof span { display: inline-flex; align-items: center; gap: 8px; }
.hero-proof b { color: var(--gold); font-size: 10px; letter-spacing: .1em; }

.hero-demo { perspective: 1400px; }
.demo-window {
  overflow: hidden;
  border: 1px solid rgba(11, 47, 98, .13);
  border-radius: 26px;
  background: rgba(255, 255, 255, .82);
  box-shadow: var(--shadow);
  transform: rotateY(-2.5deg) rotateX(1deg);
  transform-origin: center;
}
.window-top, .window-bottom { height: 48px; padding: 0 18px; display: flex; align-items: center; color: #6b7177; font-size: 10px; font-weight: 800; letter-spacing: .12em; }
.window-top { justify-content: space-between; border-bottom: 1px solid var(--soft-line); }
.window-top b { padding: 5px 9px; border-radius: 999px; color: #fff; background: var(--green); font-size: 10px; }
.window-dots { display: flex; gap: 6px; }
.window-dots i { width: 7px; height: 7px; border-radius: 50%; background: #c9cdd1; }
.product-stage { position: relative; min-height: 410px; display: grid; place-items: center; overflow: hidden; background: #dfe4e8; }
.product-stage::after { content: ""; position: absolute; inset: 0; background: linear-gradient(130deg, transparent 52%, rgba(255,255,255,.44) 52.2%, transparent 60%); pointer-events: none; }
.product-stage img { width: 100%; height: 100%; min-height: 410px; object-fit: cover; transition: transform .55s ease; }
.product-stage:hover img { transform: scale(1.025); }
.feature-tag {
  position: absolute;
  z-index: 2;
  padding: 7px 11px;
  border: 1px solid rgba(255,255,255,.75);
  border-radius: 999px;
  color: #fff;
  background: rgba(13, 26, 43, .76);
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 24px rgba(0,0,0,.15);
  font-size: 11px;
  font-weight: 800;
}
.tag-one { left: 5%; top: 9%; }
.tag-two { right: 6%; top: 21%; }
.tag-three { left: 8%; bottom: 24%; }
.tag-four { right: 9%; bottom: 15%; }
.play-button {
  position: absolute;
  z-index: 3;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  white-space: nowrap;
}
.play-button i { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; color: var(--ink); background: #fff; font-style: normal; }
.play-button b { padding: 10px 15px; border-radius: 999px; background: rgba(17,19,21,.8); backdrop-filter: blur(8px); font-size: 12px; }
.window-bottom { justify-content: center; gap: 28px; background: #fff; }
.window-bottom span::before { content: "•"; margin-right: 8px; color: var(--gold); }
.demo-caption { width: 78%; margin: 18px auto 0; padding: 16px 20px; display: flex; justify-content: space-between; gap: 20px; border-radius: 14px; color: #fff; background: var(--blue); box-shadow: 0 16px 34px rgba(11,47,98,.2); font-size: 13px; }
.demo-caption span { color: #d8e4f1; }

.pain-strip { padding: 80px 5vw 70px; color: #fff; background: #13171c; }
.pain-intro { display: grid; grid-template-columns: .55fr 1.45fr; align-items: end; gap: 30px; }
.pain-intro span, .section-heading > span, .fit-head > div > span, .faq-title > span { color: #aab1b9; font-size: 11px; font-weight: 900; letter-spacing: .18em; }
.pain-intro h2 { max-width: 800px; margin: 0; font-size: clamp(30px, 3.2vw, 48px); line-height: 1.2; letter-spacing: -.035em; }
.pain-grid { margin-top: 46px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.pain-grid article { position: relative; min-height: 160px; padding: 28px; overflow: hidden; border: 1px solid rgba(255,255,255,.1); border-radius: 18px; background: #1b2026; }
.pain-grid i { position: absolute; right: 20px; top: -18px; color: rgba(255,255,255,.07); font-family: Georgia, serif; font-size: 120px; }
.pain-grid p { position: relative; z-index: 1; margin: 0 0 16px; color: #fff; font-family: Georgia, serif; font-size: clamp(18px, 1.7vw, 26px); }
.pain-grid span { color: #9da5ae; font-size: 14px; }
.pain-answer { margin: 28px 0 0; color: #aab1b8; text-align: center; }
.pain-answer b { color: #f0c777; }

.section { padding: 110px 5vw; }
.section-heading { max-width: 820px; margin-bottom: 52px; }
.section-heading.centered { margin-left: auto; margin-right: auto; text-align: center; }
.section-heading > span { color: var(--gold); }
.section-heading h2 { margin: 12px 0 16px; font-size: clamp(38px, 4.2vw, 62px); line-height: 1.15; letter-spacing: -.045em; }
.section-heading h2 span { color: var(--blue); }
.section-heading p { margin: 0; color: var(--muted); font-size: 17px; }

.difference { background: #fff; }
.compare-grid { max-width: 1180px; margin: 0 auto; display: grid; grid-template-columns: 1fr 74px 1fr; align-items: stretch; }
.compare-card { position: relative; min-height: 380px; padding: 42px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); }
.compare-card h3 { margin: 22px 0 24px; font-size: 30px; }
.compare-label { display: inline-flex; padding: 7px 12px; border-radius: 999px; color: #626970; background: #eff1f2; font-size: 11px; font-weight: 900; letter-spacing: .13em; }
.compare-card ul { margin: 0; padding: 0; display: grid; gap: 14px; list-style: none; color: #646a70; }
.compare-card li { display: flex; align-items: center; gap: 11px; }
.compare-card li i { width: 22px; height: 22px; display: grid; place-items: center; border-radius: 50%; font-style: normal; font-size: 12px; }
.old-way { background: #f4f4f3; }
.old-way li i { color: #777; background: #e1e2e1; }
.new-way { color: #fff; border-color: var(--blue); background: var(--blue); box-shadow: 0 24px 60px rgba(11,47,98,.2); }
.new-way .compare-label { color: #e8c985; background: rgba(255,255,255,.1); }
.new-way h3 { color: #fff; }
.new-way ul { color: #d7e1ec; }
.new-way li i { color: var(--blue); background: #f0c777; }
.new-way a { position: absolute; left: 42px; bottom: 38px; color: #fff; font-weight: 800; }
.compare-arrow { display: grid; place-items: center; color: #a6abb0; font-size: 34px; }
.old-files { position: absolute; left: 42px; bottom: 38px; display: flex; gap: 9px; }
.old-files span { width: 50px; height: 42px; display: grid; place-items: center; border: 1px solid #d5d7d8; border-radius: 8px; color: #8b9095; background: #fff; font-size: 10px; font-weight: 900; }

.demo-section { background: #edf0f2; }
.demo-layout { max-width: 1320px; margin: 0 auto; display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: clamp(54px, 7vw, 110px); }
.demo-visual { position: relative; min-height: 570px; display: grid; place-items: center; border-radius: 28px; background: #dce2e6; box-shadow: inset 0 0 0 1px rgba(11,47,98,.08); }
.demo-visual::before { content: ""; position: absolute; inset: 24px; border: 1px solid rgba(11,47,98,.08); border-radius: 18px; }
.demo-visual img { width: 100%; height: 100%; min-height: 570px; object-fit: cover; border-radius: 28px; }
.demo-chip { position: absolute; min-width: 112px; padding: 12px 16px; border-radius: 12px; color: #fff; background: rgba(17,19,21,.84); backdrop-filter: blur(8px); box-shadow: 0 12px 28px rgba(0,0,0,.16); font-size: 13px; font-weight: 800; }
.demo-chip b { margin-right: 8px; color: #eec778; font-size: 10px; }
.chip-a { left: -18px; top: 18%; }
.chip-b { right: -20px; top: 34%; }
.chip-c { left: 3%; bottom: 20%; }
.chip-d { right: 2%; bottom: 11%; }
.eyebrow.dark { color: var(--green); }
.demo-content h2 { margin: 0 0 24px; font-size: clamp(42px, 4.2vw, 64px); line-height: 1.12; letter-spacing: -.045em; }
.demo-content > p:not(.eyebrow) { margin: 0; color: var(--muted); font-size: 17px; }
.demo-points { margin: 30px 0; display: grid; gap: 0; border-top: 1px solid #d3d8dc; }
.demo-points div { padding: 16px 0; display: grid; grid-template-columns: 150px 1fr; gap: 16px; border-bottom: 1px solid #d3d8dc; }
.demo-points strong { font-size: 14px; }
.demo-points span { color: #6b7177; font-size: 13px; }
.demo-actions { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.text-link { color: var(--blue); font-size: 14px; font-weight: 800; }

.scenarios { background: #fff; }
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.scenarios .section-heading { max-width: 1100px; }
.scenarios .section-heading h2 { font-size: clamp(38px, 3.7vw, 56px); }
.scenario-grid article { position: relative; min-height: 240px; padding: 30px; border: 1px solid var(--line); border-radius: 20px; background: #fafafa; transition: .3s ease; }
.scenario-grid article:hover { transform: translateY(-6px); border-color: rgba(11,47,98,.24); box-shadow: 0 18px 44px rgba(17,25,35,.08); }
.scenario-grid article > b { position: absolute; top: 22px; right: 24px; color: #b0b5ba; font-size: 10px; }
.scenario-grid i { width: 54px; height: 54px; display: grid; place-items: center; border-radius: 16px; color: var(--blue); background: #e8edf3; font-style: normal; font-size: 24px; }
.scenario-grid h3 { margin: 30px 0 7px; font-size: 19px; }
.scenario-grid p { margin: 0; color: var(--muted); font-size: 14px; }

.fit-section { color: #fff; background: #111821; }
.fit-head { display: grid; grid-template-columns: 1.1fr .9fr; align-items: end; gap: 80px; }
.fit-head > div > span { color: #6f849d; }
.fit-head h2 { margin: 14px 0 0; font-size: clamp(42px, 5vw, 72px); line-height: 1.08; letter-spacing: -.05em; }
.fit-head h2 em { color: #efc87e; font-style: normal; }
.fit-head > p { margin: 0 0 10px; color: #9daab7; font-size: 17px; }
.fit-grid { margin-top: 58px; display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid rgba(255,255,255,.12); border-bottom: 1px solid rgba(255,255,255,.12); }
.fit-grid div { min-height: 160px; padding: 26px 18px; display: flex; flex-direction: column; border-right: 1px solid rgba(255,255,255,.1); }
.fit-grid div:last-child { border-right: 0; }
.fit-grid i { color: #718397; font-size: 10px; font-style: normal; }
.fit-grid b { margin-top: auto; font-size: 20px; }
.fit-grid span { color: #8896a5; font-size: 12px; }
.industry-focus { margin-top: 28px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.industry-focus article { padding: 34px; border: 1px solid rgba(255,255,255,.1); border-radius: 20px; background: rgba(255,255,255,.04); }
.industry-focus span { color: #718397; font-size: 10px; font-weight: 900; letter-spacing: .12em; }
.industry-focus h3 { margin: 10px 0; font-size: 28px; }
.industry-focus p { color: #99a5b2; }
.industry-focus a { color: #efc87e; font-size: 14px; font-weight: 800; }

.process-section { background: #f1f2f3; }
.process-list { max-width: 1200px; margin: 0 auto; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); list-style: none; counter-reset: step; }
.process-list li { position: relative; min-height: 220px; padding: 30px; border-top: 1px solid #cfd4d8; border-bottom: 1px solid #cfd4d8; border-right: 1px solid #cfd4d8; }
.process-list li:first-child { border-left: 1px solid #cfd4d8; border-radius: 18px 0 0 18px; }
.process-list li:last-child { border-radius: 0 18px 18px 0; }
.process-list li > b { color: var(--gold); font-size: 11px; letter-spacing: .14em; }
.process-list li div { margin-top: 58px; }
.process-list h3 { margin: 0 0 8px; font-size: 19px; }
.process-list p { margin: 0; color: var(--muted); font-size: 13px; }
.trust-row { max-width: 1050px; margin: 28px auto 0; display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; }
.trust-row span { padding: 8px 13px; border: 1px solid #d3d7da; border-radius: 999px; color: #5f666c; background: #fff; font-size: 12px; font-weight: 700; }

.faq-section { display: grid; grid-template-columns: .75fr 1.25fr; gap: 90px; background: #fff; }
.faq-title h2 { margin: 12px 0 18px; font-size: clamp(38px, 4vw, 58px); line-height: 1.15; letter-spacing: -.045em; }
.faq-title p { color: var(--muted); }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { padding: 24px 4px; display: flex; justify-content: space-between; gap: 20px; cursor: pointer; font-size: 17px; font-weight: 800; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary i { font-size: 24px; font-style: normal; font-weight: 400; transition: transform .25s ease; }
.faq-list details[open] summary i { transform: rotate(45deg); }
.faq-list details p { margin: -5px 0 24px; padding-right: 42px; color: var(--muted); font-size: 14px; }

.contact-section { margin: 0; padding: 100px 6vw; display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 90px; color: #fff; background: linear-gradient(135deg, #0a2a58, #071d3b 60%, #0f345d); }
.contact-copy h2 { margin: 0 0 24px; font-size: clamp(42px, 4.6vw, 68px); line-height: 1.1; letter-spacing: -.05em; }
.contact-copy .eyebrow { color: #d8e4f1; }
.contact-copy > p:not(.eyebrow) { max-width: 760px; color: #bac9da; font-size: 17px; }
.contact-actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }
.button-light { color: var(--blue); background: #fff; }
.button-outline-light { color: #fff; border-color: rgba(255,255,255,.3); background: transparent; }
.button-outline-light:hover { background: rgba(255,255,255,.1); }
.contact-copy small { margin-top: 18px; display: block; color: #8ea3ba; }
.wechat-card { max-width: 460px; justify-self: end; padding: 28px; border: 1px solid rgba(255,255,255,.16); border-radius: 24px; background: rgba(255,255,255,.08); backdrop-filter: blur(10px); box-shadow: 0 24px 70px rgba(0,0,0,.14); }
.wechat-card-copy > span { color: #eec778; font-size: 10px; font-weight: 900; letter-spacing: .16em; }
.wechat-card-copy h3 { margin: 8px 0 7px; font-size: 28px; }
.wechat-card-copy p { margin: 0; color: #bdcbd9; font-size: 13px; }
.wechat-qr { margin: 20px 0 14px; padding: 14px; overflow: hidden; border-radius: 18px; background: #fff; }
.wechat-qr img { width: 100%; max-height: 430px; object-fit: contain; }
.wechat-card > small { display: block; color: #9fb1c4; text-align: center; font-size: 12px; }

footer { padding: 42px 5vw; display: grid; grid-template-columns: 220px 1fr auto; align-items: center; gap: 30px; border-top: 1px solid #dfe2e5; background: #f4f5f6; }
.footer-brand { width: 190px; }
.footer-brand img { height: 62px; object-fit: contain; object-position: left; }
footer > p { margin: 0; color: var(--muted); font-size: 14px; }
footer > div { display: grid; justify-items: end; color: #72777c; font-size: 11px; }

.mobile-contact { display: none; }
.toast { position: fixed; z-index: 100; left: 50%; bottom: 30px; padding: 12px 18px; border-radius: 999px; color: #fff; background: rgba(17,19,21,.92); box-shadow: 0 12px 30px rgba(0,0,0,.18); transform: translate(-50%, 80px); opacity: 0; pointer-events: none; transition: .28s ease; font-size: 13px; }
.toast.show { transform: translate(-50%, 0); opacity: 1; }

@media (max-width: 1180px) {
  .site-header { grid-template-columns: 200px 1fr auto; gap: 16px; padding: 0 3vw; }
  .site-header nav { gap: 16px; }
  .site-header nav a { font-size: 12px; }
  .hero { grid-template-columns: 1fr 1fr; gap: 36px; }
  .product-stage, .product-stage img { min-height: 340px; }
  .hero-proof { gap: 10px 16px; }
  .demo-caption { width: 92%; }
}

@media (max-width: 920px) {
  .site-header { height: 68px; padding: 0 18px; grid-template-columns: 1fr auto; }
  .brand { width: 168px; }
  .site-header nav {
    position: absolute;
    left: 14px;
    right: 14px;
    top: 70px;
    padding: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
    box-shadow: var(--shadow);
  }
  .site-header nav.open { display: flex; }
  .site-header nav a { padding: 12px; font-size: 14px; }
  .header-cta { display: none; }
  .menu-button { width: 42px; height: 42px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; border: 0; border-radius: 12px; background: #fff; }
  .menu-button span { width: 19px; height: 2px; background: var(--ink); }
  .hero { min-height: auto; padding: 76px 5vw 80px; grid-template-columns: 1fr; }
  .hero-copy { text-align: center; }
  .hero-copy .eyebrow, .hero-actions, .hero-proof { justify-content: center; }
  .hero-lead { margin-left: auto; margin-right: auto; }
  .hero-demo { max-width: 760px; margin: 10px auto 0; }
  .pain-intro { grid-template-columns: 1fr; }
  .pain-grid { grid-template-columns: 1fr; }
  .pain-grid article { min-height: 130px; }
  .compare-grid { grid-template-columns: 1fr; gap: 16px; }
  .compare-arrow { transform: rotate(90deg); }
  .demo-layout { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .fit-head { grid-template-columns: 1fr; gap: 28px; }
  .fit-grid { grid-template-columns: repeat(2, 1fr); }
  .fit-grid div { border-bottom: 1px solid rgba(255,255,255,.1); }
  .industry-focus { grid-template-columns: 1fr; }
  .process-list { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .process-list li, .process-list li:first-child, .process-list li:last-child { border: 1px solid #cfd4d8; border-radius: 16px; }
  .faq-section { grid-template-columns: 1fr; gap: 46px; }
  .contact-section { grid-template-columns: 1fr; gap: 48px; }
  .contact-copy, .wechat-card { min-width: 0; }
  .wechat-card { width: 100%; max-width: 520px; justify-self: start; }
  footer { grid-template-columns: 1fr; justify-items: center; text-align: center; padding-bottom: 90px; }
  footer > div { justify-items: center; }
}

@media (max-width: 620px) {
  .hero { padding: 58px 18px 64px; }
  .hero h1 { font-size: 42px; }
  .hero-lead { font-size: 16px; line-height: 1.75; }
  .hero-actions .button { width: 100%; }
  .hero-proof { display: grid; grid-template-columns: 1fr; justify-items: start; width: max-content; max-width: 100%; margin-left: auto; margin-right: auto; }
  .demo-window { transform: none; border-radius: 18px; }
  .window-top { padding: 0 12px; }
  .window-top > span { display: none; }
  .product-stage, .product-stage img { min-height: 250px; }
  .feature-tag { padding: 5px 8px; font-size: 9px; }
  .play-button b { font-size: 10px; }
  .window-bottom { gap: 10px; font-size: 8px; }
  .demo-caption { width: 100%; display: grid; text-align: center; }
  .pain-strip, .section { padding: 72px 18px; }
  .pain-intro h2 { font-size: 34px; }
  .section-heading h2 { font-size: 38px; }
  .compare-card { min-height: 360px; padding: 30px; }
  .new-way a, .old-files { left: 30px; }
  .demo-visual, .demo-visual img { min-height: 350px; }
  .demo-visual img { object-fit: cover; }
  .demo-chip { min-width: 82px; padding: 9px 10px; font-size: 10px; }
  .chip-a { left: 0; }
  .chip-b { right: 0; }
  .demo-content h2 { font-size: 42px; }
  .demo-points div { grid-template-columns: 1fr; gap: 3px; }
  .demo-actions .button { width: 100%; }
  .scenario-grid { grid-template-columns: 1fr; }
  .fit-section { padding-left: 18px; padding-right: 18px; }
  .fit-head h2 { font-size: 43px; }
  .fit-grid { grid-template-columns: 1fr; }
  .fit-grid div { min-height: 116px; border-right: 0; }
  .process-list { grid-template-columns: 1fr; }
  .process-list li { min-height: 170px; }
  .process-list li div { margin-top: 32px; }
  .faq-list summary { font-size: 15px; }
  .contact-section { padding: 72px 18px 110px; }
  .contact-copy h2 { font-size: 42px; }
  .contact-actions .button { width: 100%; }
  .wechat-card { padding: 20px; }
  .wechat-card-copy h3 { font-size: 25px; }
  .wechat-qr img { max-height: none; }
  .mobile-contact { position: fixed; z-index: 90; left: 12px; right: 12px; bottom: 10px; padding: 6px; display: grid; grid-template-columns: 1fr 1fr; gap: 6px; border: 1px solid rgba(255,255,255,.55); border-radius: 18px; background: rgba(255,255,255,.88); backdrop-filter: blur(16px); box-shadow: 0 16px 46px rgba(17,25,35,.18); }
  .mobile-contact a { min-height: 46px; display: grid; place-items: center; border-radius: 13px; background: #eef0f2; font-size: 13px; font-weight: 900; }
  .mobile-contact a:last-child { color: #fff; background: var(--blue); }
}

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


/* bilingual-preview-v1 */
.site-header nav .lang-nav{padding:7px 11px;border:1px solid #d9e0e8;border-radius:999px;background:#fff;color:#1d2939;font-size:12px;font-weight:850}.site-header nav .lang-nav::after{display:none}.site-header nav .lang-nav:hover{background:#f2f6fb;color:var(--blue)}