:root {
  --canvas: #f8fafc;
  --surface: #ffffff;
  --ink: #10233e;
  --muted: #5e6d82;
  --faint: #7b899b;
  --line: #dce4ee;
  --blue: #0a66d9;
  --blue-strong: #0758bb;
  --blue-soft: #eaf2ff;
  --night: #10233e;
  --night-muted: #b7c7db;
  --max-width: 1200px;
  --shadow: 0 18px 44px rgba(16, 35, 62, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--canvas);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans", sans-serif;
  font-size: 16px;
  line-height: 1.62;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid rgba(10, 102, 217, .42); outline-offset: 3px; }
.shell { width: min(var(--max-width), calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 10; left: 16px; top: -60px; padding: 10px 14px; border-radius: 8px; color: #fff; background: var(--blue); }
.skip-link:focus { top: 16px; }

.site-header {
  position: sticky;
  z-index: 5;
  top: 0;
  width: min(var(--max-width), calc(100% - 64px));
  min-height: 72px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid transparent;
  background: color-mix(in srgb, var(--canvas) 90%, transparent);
  backdrop-filter: blur(16px);
}
.brand { display: inline-flex; flex: none; align-items: center; gap: 10px; font-size: 20px; font-weight: 730; letter-spacing: -.045em; }
.brand-mark { width: 36px; height: 36px; border-radius: 10px; box-shadow: 0 4px 12px rgba(16, 35, 62, .16); }
nav { display: flex; align-items: center; gap: 26px; margin-left: auto; color: var(--muted); font-size: 14px; font-weight: 560; }
nav a, .text-link, footer a { transition: color .18s ease; }
nav a:hover, .text-link:hover, footer a:hover { color: var(--blue); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.language-picker { display: inline-flex; gap: 1px; padding: 3px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); }
.language-picker button { min-width: 30px; min-height: 28px; padding: 0 7px; border: 0; border-radius: 5px; color: var(--muted); background: transparent; font: 650 11px/1 inherit; cursor: pointer; }
.language-picker button[aria-pressed="true"] { color: var(--blue); background: var(--blue-soft); }

.button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 18px; border: 1px solid var(--blue); border-radius: 9px; color: #fff; background: var(--blue); box-shadow: 0 7px 15px rgba(10, 102, 217, .18); font-size: 14px; font-weight: 680; transition: transform .18s ease, background .18s ease, box-shadow .18s ease; }
.button:hover { background: var(--blue-strong); box-shadow: 0 10px 20px rgba(10, 102, 217, .23); transform: translateY(-1px); }
.button-small { min-height: 34px; padding-inline: 14px; font-size: 13px; }
.button-secondary { border-color: var(--line); color: var(--ink); background: var(--surface); box-shadow: none; }
.button-secondary:hover { color: var(--blue-strong); border-color: #bfd4f4; background: #f6f9fe; box-shadow: none; }

.hero { display: grid; grid-template-columns: minmax(300px, .76fr) minmax(520px, 1.24fr); align-items: center; gap: 64px; padding-block: 96px 88px; }
.eyebrow { margin: 0 0 14px; color: var(--blue); font-size: 11px; font-weight: 760; letter-spacing: .1em; line-height: 1.35; }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { letter-spacing: -.055em; }
h1 { max-width: 550px; margin-bottom: 23px; font-size: clamp(45px, 5vw, 64px); line-height: 1.02; }
.hero-summary { max-width: 500px; margin-bottom: 28px; color: var(--muted); font-size: 18px; line-height: 1.56; }
.hero-actions, .cta-actions { display: flex; align-items: center; gap: 20px; }
.text-link { color: #184580; font-size: 14px; font-weight: 670; }
.compatibility { margin: 17px 0 0; color: var(--faint); font-size: 12px; }
.demo-credit { max-width: 500px; margin: 11px 0 0; color: var(--faint); font-size: 11px; line-height: 1.55; }
.demo-credit a { color: #245fba; font-weight: 650; text-decoration-color: #a8c9f2; text-underline-offset: 2px; }
.product-shot { position: relative; margin: 0; overflow: hidden; border: 1px solid #cedae8; border-radius: 14px; background: #fff; box-shadow: var(--shadow); line-height: 0; }
.product-shot img { display: block; width: 100%; height: auto; }
.product-shot figcaption { position: absolute; right: 12px; bottom: 12px; padding: 5px 7px; border-radius: 5px; color: #fff; background: rgba(16, 35, 62, .78); font-size: 11px; font-weight: 600; letter-spacing: .01em; line-height: 1.2; }
.hero-shot { border-radius: 16px; }

.facts { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.facts div { display: grid; gap: 3px; padding: 18px 26px; }
.facts div + div { border-left: 1px solid var(--line); }
.facts strong { font-size: 14px; font-weight: 680; }
.facts span { color: var(--muted); font-size: 13px; }

.section { padding-block: 112px; }
.section-heading { max-width: 690px; }
.section-heading h2, .precision h2, .install-copy h2 { margin-bottom: 0; font-size: clamp(34px, 4vw, 48px); line-height: 1.08; }
.compact-heading { max-width: 620px; }
.workflow-layout { display: grid; grid-template-columns: .78fr 1.22fr; align-items: center; gap: 64px; margin-top: 52px; }
.steps { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.steps li { display: grid; grid-template-columns: 36px 1fr; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.steps li > span { padding-top: 2px; color: var(--blue); font-size: 12px; font-weight: 760; letter-spacing: .04em; }
.steps h3 { margin-bottom: 4px; font-size: 16px; letter-spacing: -.02em; }
.steps p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.55; }
.overview-shot { box-shadow: 0 16px 36px rgba(16, 35, 62, .1); }

.precision { display: grid; grid-template-columns: .8fr 1.2fr; align-items: center; gap: 72px; border-top: 1px solid var(--line); }
.precision-copy > p:not(.eyebrow) { max-width: 470px; margin: 23px 0; color: var(--muted); font-size: 16px; }
.check-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; color: var(--ink); font-size: 14px; font-weight: 560; }
.check-list li { display: flex; align-items: flex-start; gap: 10px; }
.check-list li::before { flex: none; width: 16px; height: 16px; margin-top: 3px; border: 1.5px solid var(--blue); border-radius: 50%; content: ""; background: radial-gradient(circle at 50% 50%, var(--blue) 0 3px, transparent 3.5px); }
.manual-shot { box-shadow: 0 18px 42px rgba(16, 35, 62, .11); }

.capabilities { border-top: 1px solid var(--line); }
.capability-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; margin-top: 54px; }
.capability-grid article { min-width: 0; }
.capability-grid svg { width: 24px; height: 24px; margin-bottom: 19px; stroke: var(--blue); stroke-width: 1.8; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.capability-grid h3 { margin-bottom: 7px; font-size: 16px; letter-spacing: -.02em; }
.capability-grid p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.58; }

.privacy-section { color: #f7fbff; background: var(--night); }
.privacy-card { display: grid; grid-template-columns: 1.08fr .92fr; align-items: end; gap: 72px; }
.inverse { color: #7eb8ff; }
.privacy-card h2 { margin-bottom: 0; font-size: clamp(34px, 4vw, 49px); line-height: 1.08; letter-spacing: -.055em; }
.privacy-card > p { margin: 0; color: var(--night-muted); font-size: 17px; line-height: 1.6; }

.install-section { max-width: 760px; }
.install-copy > p:not(.eyebrow):not(.compatibility) { max-width: 390px; margin: 22px 0 0; color: var(--muted); font-size: 16px; }

.faq-section { border-top: 1px solid var(--line); }
.faq-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 46px; }
.faq-grid article { min-height: 154px; padding: 20px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.faq-grid h3 { margin: 0; font-size: 15px; font-weight: 680; letter-spacing: -.015em; }
.faq-grid p { margin: 12px 0 0; color: var(--muted); font-size: 14px; line-height: 1.55; }

.final-cta { padding-block: 100px 112px; text-align: center; }
.final-cta .eyebrow { margin-bottom: 14px; }
.final-cta h2 { margin-bottom: 30px; font-size: clamp(36px, 4.4vw, 54px); line-height: 1.05; }
.cta-actions { justify-content: center; }
.cta-actions .button { min-width: 200px; }
footer { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; padding-block: 24px 34px; border-top: 1px solid var(--line); color: var(--faint); font-size: 12px; }
footer span:nth-child(2) { margin-right: auto; color: var(--muted); font-weight: 620; }

@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; gap: 48px; padding-block: 72px; }
  .hero-copy { max-width: 650px; }
  .hero-shot { max-width: 760px; }
  .workflow-layout, .precision, .privacy-card { grid-template-columns: 1fr; gap: 40px; }
  .capability-grid { grid-template-columns: repeat(2, 1fr); gap: 36px 28px; }
}

@media (max-width: 680px) {
  .shell, .site-header { width: min(100% - 40px, var(--max-width)); }
  .site-header { min-height: 64px; gap: 12px; }
  .brand { font-size: 18px; }
  .brand-mark { width: 32px; height: 32px; border-radius: 9px; }
  nav { display: none; }
  .header-actions { margin-left: auto; gap: 8px; }
  .language-picker { display: inline-flex; }
  .language-picker button { min-width: 0; padding-inline: 5px; }
  .button-small { min-height: 34px; padding-inline: 12px; }
  h1 { font-size: clamp(40px, 12vw, 52px); }
  .hero { gap: 36px; padding-block: 52px 58px; }
  .hero-summary { font-size: 17px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 14px; }
  .facts { grid-template-columns: 1fr; }
  .facts div { padding: 15px 0; }
  .facts div + div { border-top: 1px solid var(--line); border-left: 0; }
  .section { padding-block: 72px; }
  .workflow-layout { margin-top: 36px; }
  .precision { gap: 34px; }
  .capability-grid, .faq-grid { grid-template-columns: 1fr; gap: 14px; }
  .capability-grid { margin-top: 36px; }
  .faq-grid { margin-top: 32px; }
  .faq-grid article { min-height: auto; }
  .privacy-section { padding-block: 72px; }
  .final-cta { padding-block: 72px 80px; }
  .cta-actions { align-items: stretch; flex-direction: column; gap: 12px; }
  .cta-actions .button { width: 100%; }
  footer { gap: 12px 16px; }
  footer span:nth-child(2) { width: 100%; margin-right: 0; }
}

@media (max-width: 360px) {
  .brand span { display: none; }
}

html:lang(zh) h1, html:lang(ja) h1 { font-size: clamp(42px, 4.4vw, 58px); }

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