:root {
  color-scheme: light;
  --ink: #111217;
  --muted: #686d78;
  --faint: #9499a5;
  --paper: #f5f6fb;
  --white: #ffffff;
  --line: #e5e7ee;
  --blue: #1684f5;
  --blue-deep: #0d64bd;
  --green: #1e9c60;
  --orange: #bd7500;
  --radius: 8px;
  --wide: 1180px;
  --display: "Hiragino Sans GB", "PingFang SC", "Microsoft YaHei", sans-serif;
  --body: "Noto Serif CJK SC", "Songti SC", "STSong", serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  min-width: 320px;
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  width: min(calc(100% - 40px), var(--wide));
  min-height: 68px;
  margin: 0 auto;
  border-bottom: 1px solid transparent;
  font-family: var(--display);
  transition: background-color 180ms ease, border-color 180ms ease;
}

.site-header::before {
  position: absolute;
  z-index: -1;
  top: 0;
  left: 50%;
  width: 100vw;
  height: 100%;
  content: "";
  background: rgba(245, 246, 251, 0.9);
  opacity: 0;
  backdrop-filter: blur(14px);
  transform: translateX(-50%);
  transition: opacity 180ms ease;
}

.site-header.is-scrolled { border-bottom-color: var(--line); }
.site-header.is-scrolled::before { opacity: 1; }

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  font-size: 15px;
  font-weight: 750;
  line-height: 1;
}

.brand img { border-radius: 8px; }

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 3vw, 38px);
  color: var(--muted);
  font-size: 14px;
}

.nav-links a,
.footer-links a { transition: color 160ms ease; }
.nav-links a:hover, .nav-links a:focus-visible, .nav-links .is-current, .footer-links a:hover, .footer-links a:focus-visible { color: var(--blue); }

.nav-cta, .primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  border: 1px solid var(--blue);
  border-radius: 5px;
  background: var(--blue);
  color: var(--white);
  font-family: var(--display);
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.nav-cta { min-height: 34px; font-size: 13px; }
.nav-cta:hover, .primary-button:hover { border-color: var(--blue-deep); background: var(--blue-deep); transform: translateY(-1px); }

.section-band { width: min(calc(100% - 40px), var(--wide)); margin: 0 auto; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(310px, 0.72fr);
  align-items: center;
  gap: clamp(48px, 8vw, 126px);
  min-height: calc(100svh - 68px);
  padding: 82px 0 94px;
}

.eyebrow {
  margin: 0 0 15px;
  color: var(--blue);
  font-family: var(--display);
  font-size: 14px;
  font-weight: 750;
  line-height: 1.35;
}

h1, h2, h3, p { margin-top: 0; }
h1, h2, h3, strong, .feature-index, dt { font-family: var(--display); }

h1 {
  max-width: 780px;
  margin-bottom: 24px;
  font-size: clamp(46px, 6.1vw, 88px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  max-width: 820px;
  margin-bottom: 18px;
  font-size: clamp(33px, 4.15vw, 58px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: 0;
}

h3 { margin-bottom: 10px; font-size: 21px; line-height: 1.3; }

.hero-lede, .section-intro > p:last-child, .workflow-copy > p:not(.eyebrow), .data-copy > p:not(.eyebrow), .closing-band > p:not(.eyebrow) {
  max-width: 710px;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.62;
}

.hero-actions, .closing-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 22px;
  margin-top: 32px;
}

.text-link, .light-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  border-bottom: 1px solid currentColor;
  font-family: var(--display);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.8;
  transition: color 160ms ease;
}

.text-link:hover, .text-link:focus-visible { color: var(--blue); }
.text-link span, .light-link span { font-size: 19px; line-height: 1; transition: transform 160ms ease; }
.text-link:hover span, .light-link:hover span { transform: translateX(3px); }

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  max-width: 760px;
  margin: 54px 0 0;
  border-top: 1px solid var(--line);
}

.hero-facts div { padding: 17px 18px 0 0; }
.hero-facts div + div { padding-left: 18px; border-left: 1px solid var(--line); }
.hero-facts dt { font-size: 14px; font-weight: 750; }
.hero-facts dd { margin: 5px 0 0; color: var(--muted); font-family: var(--display); font-size: 12px; line-height: 1.5; }

.hero-product { position: relative; width: min(100%, 370px); margin: 0 auto; }
.device { overflow: hidden; border: 6px solid #16171b; border-radius: 34px; background: #f4f5f9; box-shadow: 0 34px 72px rgba(21, 30, 52, 0.2); }
.device img { width: 100%; height: auto; }
.device-hero { transform: rotate(2.2deg); }
.hero-product figcaption { width: 76%; margin: 19px 0 0 auto; color: var(--muted); font-family: var(--display); font-size: 13px; line-height: 1.55; text-align: right; }

.feature-band { padding: 112px 0 116px; border-top: 1px solid var(--line); }
.section-intro { display: grid; grid-template-columns: minmax(160px, 0.42fr) minmax(0, 1fr); column-gap: 30px; align-items: start; }
.section-intro .eyebrow { grid-row: span 2; margin-top: 10px; }
.section-intro h2 { margin-bottom: 11px; }
.section-intro > p:last-child { margin-bottom: 0; font-size: 18px; }

.feature-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; margin-top: 72px; }
.feature-item { min-height: 240px; padding: 22px 0 0; border-top: 2px solid var(--ink); }
.feature-index { display: block; margin-bottom: 50px; color: var(--blue); font-size: 13px; font-weight: 750; }
.feature-item p { margin-bottom: 0; color: var(--muted); font-size: 15px; line-height: 1.7; }

.workflow-band { display: grid; grid-template-columns: minmax(0, 0.92fr) minmax(310px, 0.75fr); align-items: center; gap: clamp(48px, 10vw, 150px); padding: 104px 0 112px; border-top: 1px solid var(--line); }
.workflow-list { display: grid; gap: 23px; margin: 42px 0 0; padding: 0; list-style: none; }
.workflow-list li { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 16px; }
.workflow-list li > span { color: var(--blue); font-family: var(--display); font-size: 13px; font-weight: 750; line-height: 1.8; }
.workflow-list strong { display: block; margin-bottom: 2px; font-size: 17px; }
.workflow-list p { margin: 0; color: var(--muted); font-size: 15px; }
.workflow-visual { position: relative; width: min(100%, 350px); margin: 0 auto; }
.device-schedule { transform: rotate(-1.4deg); }
.visual-note { position: absolute; right: -80px; bottom: 32px; padding: 16px 18px; border-left: 3px solid var(--blue); background: var(--white); box-shadow: 0 15px 30px rgba(18, 31, 54, 0.09); font-family: var(--display); font-size: 14px; font-weight: 700; line-height: 1.55; }

.screen-band { padding: 110px 0 120px; background: var(--white); }
.screen-heading { margin-bottom: 57px; }
.screen-heading h2 { margin-bottom: 0; }
.screen-rail { display: grid; grid-auto-columns: minmax(220px, 280px); grid-auto-flow: column; gap: 32px; overflow-x: auto; padding: 0 max(20px, calc((100vw - var(--wide)) / 2)) 18px; scroll-snap-type: x mandatory; scrollbar-color: #c7cad4 transparent; }
.device-card { margin: 0; scroll-snap-align: start; }
.device-card .device { border-width: 5px; border-radius: 28px; box-shadow: 0 24px 48px rgba(21, 30, 52, 0.15); }
.device-card figcaption { display: flex; justify-content: space-between; gap: 12px; padding-top: 15px; font-family: var(--display); line-height: 1.45; }
.device-card strong { font-size: 15px; }
.device-card span { color: var(--muted); font-size: 12px; text-align: right; }

.data-band { padding: 116px 0; background: #161f32; color: var(--white); }
.data-layout { display: grid; grid-template-columns: minmax(0, 0.85fr) minmax(330px, 0.75fr); gap: clamp(54px, 9vw, 130px); align-items: center; }
.data-copy h2 { color: var(--white); }
.data-copy > p:not(.eyebrow) { color: #c3cad8; }
.data-copy .eyebrow { color: #8fc8ff; }
.light-link { color: var(--white); }
.data-list { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,0.22); }
.data-list li { display: grid; grid-template-columns: 132px minmax(0, 1fr); gap: 18px; padding: 19px 0; border-bottom: 1px solid rgba(255,255,255,0.22); }
.data-list strong { font-size: 15px; }
.data-list span { color: #c3cad8; font-size: 14px; }

.closing-band { padding: 116px 0 120px; text-align: center; }
.closing-icon { margin: 0 auto 27px; border-radius: 18px; }
.closing-band h2 { max-width: 820px; margin-right: auto; margin-left: auto; }
.closing-band > p:not(.eyebrow) { margin-right: auto; margin-left: auto; font-size: 18px; }
.closing-links { justify-content: center; }

.site-footer { display: grid; grid-template-columns: 1.1fr auto auto; align-items: end; gap: 32px; width: min(calc(100% - 40px), var(--wide)); margin: 0 auto; padding: 30px 0 34px; border-top: 1px solid var(--line); color: var(--muted); font-family: var(--display); font-size: 13px; }
.footer-brand { color: var(--ink); }
.site-footer p { margin: 11px 0 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; }
.site-footer small { white-space: nowrap; }

.legal-page { background: var(--white); }
.legal-header { background: var(--white); }
.legal-header::before { background: rgba(255,255,255,0.92); }
.legal-main { width: min(calc(100% - 40px), 820px); margin: 0 auto; padding: 102px 0 112px; }
.legal-article { font-size: 16px; line-height: 1.85; }
.legal-intro { margin-bottom: 76px; padding-bottom: 42px; border-bottom: 1px solid var(--line); }
.legal-intro h1 { margin-bottom: 18px; font-size: clamp(43px, 5vw, 70px); }
.legal-intro p { margin-bottom: 5px; color: var(--muted); font-family: var(--display); font-size: 14px; }
.legal-article section { margin-top: 52px; }
.legal-article h2 { margin-bottom: 17px; font-size: 26px; }
.legal-article p { margin-bottom: 16px; }
.legal-article ul { margin: 0 0 17px; padding-left: 1.45em; }
.legal-article li { margin-bottom: 8px; }
.legal-article a { color: var(--blue-deep); border-bottom: 1px solid rgba(13,100,189,0.35); }
.legal-article address { padding: 18px 20px; border-left: 3px solid var(--blue); background: var(--paper); font-family: var(--display); font-size: 14px; font-style: normal; line-height: 1.8; }
.legal-footer { margin-top: 0; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}

@media (max-width: 820px) {
  .site-header { width: min(calc(100% - 28px), var(--wide)); gap: 14px; }
  .nav-links { display: none; }
  .section-band { width: min(calc(100% - 32px), var(--wide)); }
  .hero { grid-template-columns: 1fr; gap: 56px; min-height: auto; padding: 68px 0 76px; }
  .hero-product { width: min(81vw, 335px); margin: 0 auto; }
  .hero-facts { margin-top: 41px; }
  .hero-facts div { padding-right: 10px; }
  .hero-facts div + div { padding-left: 10px; }
  .section-intro { display: block; }
  .section-intro .eyebrow { margin-top: 0; }
  .feature-band { padding: 78px 0; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px 24px; margin-top: 44px; }
  .feature-item { min-height: 0; }
  .feature-index { margin-bottom: 32px; }
  .workflow-band { grid-template-columns: 1fr; gap: 52px; padding: 78px 0; }
  .workflow-visual { width: min(78vw, 335px); }
  .visual-note { right: -27px; bottom: 22px; }
  .screen-band { padding: 78px 0; }
  .screen-heading { margin-bottom: 38px; }
  .data-band { padding: 78px 0; }
  .data-layout { grid-template-columns: 1fr; gap: 42px; }
  .closing-band { padding: 82px 0; }
  .site-footer { grid-template-columns: 1fr; gap: 20px; width: min(calc(100% - 32px), var(--wide)); padding: 28px 0; }
  .legal-main { width: min(calc(100% - 32px), 820px); padding: 70px 0 82px; }
  .legal-intro { margin-bottom: 53px; padding-bottom: 31px; }
  .legal-article section { margin-top: 40px; }
}

@media (max-width: 520px) {
  body { font-size: 15px; }
  .site-header { min-height: 62px; }
  .brand { gap: 8px; font-size: 14px; }
  .brand img { width: 30px; height: 30px; }
  .nav-cta { padding: 0 12px; }
  h1 { font-size: clamp(41px, 12.5vw, 55px); }
  h2 { font-size: 33px; }
  .hero-lede, .section-intro > p:last-child, .workflow-copy > p:not(.eyebrow), .data-copy > p:not(.eyebrow), .closing-band > p:not(.eyebrow) { font-size: 17px; }
  .hero-actions { gap: 17px; margin-top: 25px; }
  .hero-facts { grid-template-columns: 1fr; gap: 13px; }
  .hero-facts div, .hero-facts div + div { padding: 0; border-left: 0; }
  .feature-grid { grid-template-columns: 1fr; gap: 25px; }
  .feature-item { display: grid; grid-template-columns: 42px minmax(0, 1fr); column-gap: 12px; padding-top: 16px; }
  .feature-index { grid-row: span 2; margin: 4px 0 0; }
  .feature-item h3 { margin-bottom: 6px; }
  .feature-item p { grid-column: 2; }
  .workflow-list { gap: 20px; }
  .visual-note { right: -14px; font-size: 12px; }
  .screen-rail { grid-auto-columns: minmax(216px, 70vw); gap: 20px; padding-right: 20px; padding-left: 20px; }
  .data-list li { grid-template-columns: 1fr; gap: 2px; }
  .closing-icon { width: 64px; height: 64px; }
  .footer-links { gap: 13px; }
  .legal-article { font-size: 15px; }
  .legal-article h2 { font-size: 23px; }
}