:root {
  color-scheme: light;
  --blue: #2456e8;
  --ink: #18243d;
  --muted: #647087;
  --line: #e5eaf2;
  --light: #f3f6fc;
  --white: #ffffff;
  font-family: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--white);
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
h1, h2, h3, p { margin: 0; }
svg { display: block; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 6px; border-radius: 3px; }
::selection { background: #dbe5ff; color: var(--ink); }
.container { width: min(1120px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: absolute; left: 20px; top: -80px; z-index: 10; padding: 12px 20px; color: var(--white); background: var(--blue); }
.skip-link:focus { top: 12px; }

.site-header { background: var(--white); border-bottom: 1px solid var(--line); }
.header-inner { min-height: 88px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-size: 25px; font-weight: 750; letter-spacing: -1px; }
.brand-mark { width: 33px; height: 33px; color: var(--blue); }
.brand-dot { color: var(--blue); }
.site-nav { display: flex; gap: 36px; color: #4c5870; font-size: 14px; }
.site-nav a { padding-block: 10px; }
.site-nav a:hover, .back-top:hover { color: var(--blue); }

.hero { background: var(--light); }
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 58px; padding-block: 88px 76px; }
.eyebrow { display: flex; align-items: center; gap: 9px; color: var(--blue); font-size: 13px; font-weight: 650; letter-spacing: 1px; }
.eyebrow-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--blue); }
.hero h1 { margin-top: 24px; font-size: clamp(40px, 4.5vw, 60px); line-height: 1.27; font-weight: 750; letter-spacing: -2px; }
.hero h1 span { color: var(--blue); }
.hero-description { margin-top: 24px; color: var(--muted); font-size: 16px; line-height: 1.95; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 22px; padding: 15px 23px; border-radius: 6px; font-size: 14px; font-weight: 600; transition: background 150ms ease; }
.button-primary { background: var(--blue); color: var(--white); }
.button-primary:hover { background: #1743bd; }
.button span { font-size: 18px; }
.text-link { display: inline-flex; align-items: center; gap: 12px; font-size: 14px; font-weight: 600; }
.text-link:hover { color: var(--blue); }
.hero-note { margin-top: 23px; color: var(--muted); font-size: 12px; line-height: 1.8; }
.hero-bottom { display: flex; justify-content: space-between; gap: 24px; padding-block: 23px; border-top: 1px solid #dfe6f2; color: #67748b; font-size: 13px; letter-spacing: 1px; }
.hero-bottom span { display: flex; align-items: center; gap: 12px; }
.hero-bottom span::before { content: ""; width: 4px; height: 4px; background: #8e9fbc; border-radius: 50%; }

.demo-window { min-width: 0; overflow: hidden; border: 1px solid #dde4f0; border-radius: 12px; background: var(--white); box-shadow: 0 18px 44px -22px #7d91b845; }
.demo-header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 18px 22px; border-bottom: 1px solid var(--line); }
.demo-title { display: flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 650; }
.mini-mark { display: grid; place-items: center; width: 23px; height: 23px; border-radius: 6px; color: var(--white); background: var(--blue); font-size: 15px; font-weight: 750; }
.demo-caption { color: var(--muted); font-size: 11px; }
.demo-body { padding: 24px; }
.demo-request { display: flex; align-items: center; gap: 15px; }
.product-picture { flex: 0 0 70px; display: grid; place-items: center; height: 76px; border-radius: 8px; background: #faf1e9; }
.product-picture svg { width: 56px; height: 56px; }
.demo-small-label { font-size: 10px; color: var(--muted); }
.demo-request h3 { margin-top: 5px; font-size: 14px; font-weight: 650; }
.demo-request p { margin-top: 8px; color: var(--muted); font-size: 11px; line-height: 1.6; }
.demo-prompt { display: flex; align-items: center; gap: 8px; margin-block: 23px 16px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 7px; font-size: 12px; line-height: 1.6; }
.demo-prompt > span { color: var(--blue); font-size: 16px; }
.demo-result { padding: 18px; background: #f5f8ff; border: 1px solid #e4ebfa; border-radius: 8px; }
.result-heading { display: flex; align-items: center; gap: 8px; color: var(--blue); font-size: 11px; font-weight: 600; }
.result-icon { font-size: 16px; }
.result-title { margin-top: 15px; font-size: 21px; font-weight: 650; letter-spacing: -0.5px; }
.result-copy { margin-top: 10px; color: #647087; font-size: 12px; line-height: 1.95; }
.result-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 17px; }
.result-tags span { padding: 5px 8px; border: 1px solid #e1e7f4; border-radius: 4px; background: var(--white); color: #6a7790; font-size: 10px; }
.demo-bottom { display: flex; align-items: center; gap: 6px; margin-top: 17px; color: var(--muted); font-size: 10px; }
.review-dot { width: 5px; height: 5px; flex-shrink: 0; border-radius: 50%; background: #399991; }

.section { padding-block: 88px; }
.section-heading h2, .about h2 { margin-top: 15px; font-size: 34px; line-height: 1.45; font-weight: 650; letter-spacing: -0.8px; }
.section-heading > p:last-child { margin-top: 14px; color: var(--muted); font-size: 14px; line-height: 1.9; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 37px; }
.feature-card { display: flex; flex-direction: column; padding: 28px 26px; border: 1px solid var(--line); border-radius: 8px; }
.feature-icon { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 9px; margin-bottom: 23px; }
.feature-icon svg { width: 23px; height: 23px; }
.icon-blue { color: var(--blue); background: #edf2ff; }
.icon-teal { color: #0c8c8d; background: #edf8f6; }
.icon-orange { color: #b76843; background: #fcf3ed; }
.feature-card h3 { font-size: 20px; font-weight: 650; }
.feature-card > p { margin-block: 14px 26px; color: var(--muted); font-size: 13px; line-height: 1.95; }
.feature-example { margin-top: auto; padding-top: 16px; border-top: 1px solid var(--line); font-size: 11px; color: #57647b; }
.feature-example span { display: block; margin-bottom: 8px; color: #66758c; font-size: 10px; }

.workflow { background: #f8faff; border-block: 1px solid var(--line); }
.workflow-inner { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 80px; }
.steps { list-style: none; margin: 0; padding: 0; }
.steps li { display: flex; gap: 23px; padding-block: 22px; border-bottom: 1px solid var(--line); }
.steps li:first-child { padding-top: 0; }
.steps li:last-child { border: 0; padding-bottom: 0; }
.step-number { padding-top: 1px; color: var(--blue); font-family: "SFMono-Regular", Consolas, monospace; font-size: 14px; line-height: 1.9; }
.steps h3 { font-size: 16px; font-weight: 600; line-height: 1.8; }
.steps p { margin-top: 8px; color: var(--muted); font-size: 13px; line-height: 1.9; }

.about-inner { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 80px; align-items: center; }
.about-copy > p { margin-bottom: 18px; color: var(--muted); font-size: 14px; line-height: 2; }
.about-copy .text-link { margin-top: 8px; color: var(--blue); }
.site-footer { border-top: 1px solid var(--line); }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 20px; padding-block: 30px; }
.footer-brand { font-size: 21px; font-weight: 750; letter-spacing: -0.8px; }
.footer-inner p, .back-top { color: var(--muted); font-size: 11px; }
.back-top { display: inline-flex; gap: 8px; }
.footer-meta { display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 12px; color: var(--muted); font-size: 11px; line-height: 1.8; }
.footer-separator { color: #c1c9d8; }
.footer-record { white-space: nowrap; }
.footer-record:hover { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }

@media (max-width: 980px) {
  .hero-inner { gap: 32px; padding-block: 68px; }
  .hero h1 { font-size: 43px; }
  .hero-actions { gap: 20px; }
  .demo-body { padding: 19px; }
  .feature-grid { gap: 16px; }
  .feature-card { padding: 24px 20px; }
  .workflow-inner, .about-inner { gap: 42px; }
}

@media (max-width: 760px) {
  .container { width: calc(100% - 40px); }
  .header-inner { min-height: 78px; gap: 16px; }
  .brand { font-size: 22px; }
  .brand-mark { width: 28px; height: 28px; }
  .site-nav { gap: 18px; font-size: 12px; }
  .hero-inner { grid-template-columns: 1fr; padding-block: 52px 38px; gap: 36px; }
  .hero h1 { font-size: clamp(38px, 7.5vw, 54px); }
  .hero-description { font-size: 15px; }
  .hero-note { margin-top: 20px; }
  .demo-window { width: 100%; max-width: 540px; }
  .demo-body { padding: 22px; }
  .hero-bottom { padding-block: 21px; gap: 12px; font-size: 11px; letter-spacing: 0; }
  .hero-bottom span { gap: 6px; }
  .section { padding-block: 56px; }
  .section-heading h2, .about h2 { font-size: 28px; }
  .feature-grid { grid-template-columns: 1fr; margin-top: 28px; }
  .feature-card { padding: 25px; }
  .feature-icon { margin-bottom: 18px; }
  .feature-card > p { margin-bottom: 20px; }
  .workflow-inner, .about-inner { grid-template-columns: 1fr; gap: 30px; }
  .steps li { gap: 18px; }
  .footer-inner { gap: 16px; }
  .footer-meta { order: 3; width: 100%; gap: 8px 12px; }
  .footer-separator { display: none; }
}

@media (max-width: 420px) {
  .header-inner { flex-wrap: wrap; justify-content: center; gap: 8px; padding-block: 17px 12px; }
  .site-nav { width: 100%; justify-content: center; gap: 32px; }
  .hero h1 { font-size: 38px; letter-spacing: -1.5px; }
  .hero-actions { gap: 18px; }
  .button { padding-inline: 18px; gap: 14px; }
  .text-link { font-size: 13px; gap: 8px; }
  .demo-header { padding-inline: 18px; }
  .demo-body { padding: 18px; }
  .demo-request { gap: 12px; }
  .demo-request p { font-size: 10px; }
  .demo-prompt { padding-inline: 10px; font-size: 11px; }
  .result-title { font-size: 19px; }
  .hero-bottom { justify-content: center; flex-wrap: wrap; gap: 13px; font-size: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button { transition: none; }
}