:root {
  color-scheme: light;
  --ink: #12243d;
  --muted: #5f6f83;
  --line: #dfe7ef;
  --soft: #f4f8fb;
  --soft-blue: #edf5fb;
  --white: #ffffff;
  --accent: #173d68;
  --accent-hover: #0e2d50;
  --gold: #c79a2b;
  --shadow: 0 24px 70px rgba(28, 61, 98, 0.12);
  --font: "Segoe UI Variable Display", "Aptos Display", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; color: var(--ink); background: var(--white); font-family: var(--font); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.section-shell, .nav-shell, .hero-shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }

.site-header { position: sticky; top: 0; z-index: 30; height: 68px; background: rgba(255, 255, 255, 0.92); border-bottom: 1px solid rgba(223, 231, 239, 0.8); backdrop-filter: blur(14px); }
.nav-shell { height: 100%; display: flex; align-items: center; gap: 34px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 720; font-size: 20px; letter-spacing: -0.04em; }
.brand img { width: 31px; height: 31px; object-fit: contain; }
.main-nav { margin-left: auto; display: flex; gap: 30px; align-items: center; color: #425268; font-size: 14px; font-weight: 560; }
.main-nav a, .footer-inner a { transition: color 160ms ease; }
.main-nav a:hover, .footer-inner a:hover { color: var(--accent); }
.nav-cta { padding: 10px 17px; border: 1px solid #cfd9e4; border-radius: 9px; font-size: 14px; font-weight: 650; background: #fff; }
.nav-cta:hover { border-color: var(--accent); }

.hero { overflow: hidden; background: linear-gradient(180deg, #fff 0%, #f7fbfe 100%); border-bottom: 1px solid var(--line); }
.hero-shell { min-height: min(660px, calc(100dvh - 68px)); padding: 56px 0 62px; display: grid; grid-template-columns: minmax(0, 0.94fr) minmax(420px, 1.06fr); align-items: center; gap: 58px; }
.eyebrow, .section-kicker { color: var(--accent); font-size: 13px; font-weight: 720; letter-spacing: 0.08em; text-transform: uppercase; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; }
.eyebrow span { width: 7px; height: 7px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 0 5px rgba(199, 154, 43, 0.12); }
h1 { margin: 20px 0; max-width: 640px; font-size: clamp(42px, 5.2vw, 64px); line-height: 1.08; letter-spacing: -0.055em; font-weight: 760; }
.hero-lead { max-width: 580px; margin: 0; color: var(--muted); font-size: clamp(17px, 1.8vw, 20px); line-height: 1.75; }
.hero-actions { display: flex; gap: 12px; margin-top: 32px; }
.button { min-height: 46px; padding: 0 21px; border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; gap: 9px; font-size: 14px; font-weight: 680; transition: background 160ms ease, border-color 160ms ease, transform 160ms ease; }
.button:hover { transform: translateY(-1px); }
.button-primary { color: white; background: var(--accent); border: 1px solid var(--accent); box-shadow: 0 10px 26px rgba(23, 61, 104, 0.2); }
.button-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.button-secondary { color: var(--ink); background: white; border: 1px solid #ccd7e2; }
.button-secondary:hover { border-color: #9eb0c4; }
.hero-points { display: flex; flex-wrap: wrap; gap: 9px 22px; margin-top: 28px; color: #5c6b7e; font-size: 13px; }
.hero-points span { display: inline-flex; align-items: center; gap: 7px; }
.hero-points span::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: #6d8bab; }

.hero-visual { position: relative; border: 1px solid #d6e2ec; border-radius: 28px; background: #eef6fb; box-shadow: var(--shadow); overflow: hidden; aspect-ratio: 1.19 / 1; }
.hero-visual::after { content: ""; position: absolute; inset: 0; box-shadow: inset 0 0 70px rgba(255,255,255,.45); pointer-events: none; }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }
.visual-label, .visual-status { position: absolute; z-index: 2; background: rgba(255,255,255,.9); border: 1px solid rgba(202,215,228,.92); box-shadow: 0 12px 30px rgba(24, 55, 88, .12); backdrop-filter: blur(12px); }
.visual-label { top: 20px; left: 20px; padding: 9px 13px; border-radius: 10px; font-size: 12px; font-weight: 720; letter-spacing: .05em; }
.visual-status { right: 20px; bottom: 20px; display: flex; align-items: center; gap: 10px; padding: 11px 14px; border-radius: 12px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #3b9b75; box-shadow: 0 0 0 5px rgba(59,155,117,.12); }
.visual-status div { display: grid; gap: 2px; }
.visual-status strong { font-size: 12px; }
.visual-status small { color: var(--muted); font-size: 10px; }

.trust-strip { border-bottom: 1px solid var(--line); background: #fff; }
.trust-grid { min-height: 104px; display: grid; grid-template-columns: repeat(4, 1fr); align-items: center; }
.trust-grid div { display: grid; gap: 6px; padding: 0 28px; border-left: 1px solid var(--line); }
.trust-grid div:first-child { padding-left: 0; border-left: 0; }
.trust-grid strong { font-size: 15px; }
.trust-grid span { color: var(--muted); font-size: 13px; }

.section { padding: 104px 0; }
.section-kicker { margin: 0 0 15px; }
.split-heading { display: grid; grid-template-columns: 1.1fr .9fr; gap: 80px; align-items: end; margin-bottom: 46px; }
h2 { margin: 0; max-width: 650px; font-size: clamp(32px, 3.7vw, 46px); line-height: 1.2; letter-spacing: -0.045em; font-weight: 740; }
.split-heading > p, .workflow-copy > p, .faq-intro { margin: 0; color: var(--muted); line-height: 1.8; font-size: 16px; }
.feature-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 18px; }
.feature-primary, .feature-list { border: 1px solid var(--line); border-radius: 20px; background: var(--white); }
.feature-primary { min-height: 386px; padding: 30px; display: flex; flex-direction: column; }
.feature-index { color: #71849a; font-size: 12px; font-variant-numeric: tabular-nums; letter-spacing: .08em; }
.feature-primary h3, .feature-list h3 { margin: 18px 0 9px; font-size: 20px; letter-spacing: -.025em; }
.feature-primary p, .feature-list p { margin: 0; color: var(--muted); line-height: 1.7; font-size: 14px; }
.endpoint-box { margin-top: auto; padding: 18px; border: 1px solid #d6e3ed; border-radius: 12px; background: var(--soft); display: grid; gap: 8px; overflow: hidden; }
.endpoint-box span { color: #74869a; font-size: 10px; font-weight: 700; letter-spacing: .12em; }
.endpoint-box code { color: var(--accent); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: 14px; white-space: nowrap; }
.feature-list { overflow: hidden; }
.feature-list article { min-height: 128px; padding: 22px 26px; display: grid; grid-template-columns: 42px 1fr; border-bottom: 1px solid var(--line); }
.feature-list article:last-child { border-bottom: 0; }
.feature-list h3 { margin-top: 0; font-size: 17px; }

.section-tint { background: var(--soft-blue); border-block: 1px solid #dce9f2; }
.workflow-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 110px; align-items: start; }
.workflow-copy h2 { margin-bottom: 20px; }
.text-link { display: inline-flex; gap: 8px; margin-top: 26px; color: var(--accent); font-size: 14px; font-weight: 700; }
.steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid #cfdde8; }
.steps li { padding: 24px 0; display: grid; grid-template-columns: 48px 1fr; gap: 14px; border-bottom: 1px solid #cfdde8; }
.steps > li > span { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--accent); font-size: 12px; font-weight: 700; }
.steps strong { display: block; margin-bottom: 7px; font-size: 17px; }
.steps p { margin: 0; color: var(--muted); font-size: 14px; }

.faq-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 110px; }
.faq-intro { margin-top: 20px; max-width: 430px; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { cursor: pointer; list-style: none; padding: 23px 36px 23px 0; position: relative; font-size: 16px; font-weight: 650; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 20px; color: #73859a; font-size: 20px; font-weight: 400; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: -4px 46px 22px 0; color: var(--muted); line-height: 1.75; font-size: 14px; }

.final-cta { padding: 0 0 80px; }
.final-cta-inner { padding: 42px 48px; min-height: 170px; display: flex; align-items: center; justify-content: space-between; gap: 30px; border-radius: 22px; background: #edf4f9; border: 1px solid #d8e5ee; }
.final-cta h2 { font-size: clamp(28px, 3vw, 38px); }
footer { border-top: 1px solid var(--line); }
.footer-inner { min-height: 96px; display: flex; align-items: center; gap: 34px; color: var(--muted); font-size: 13px; }
.brand-footer { color: var(--ink); font-size: 17px; }
.brand-footer img { width: 26px; height: 26px; }
.footer-inner p { margin: 0 auto 0 0; }
.footer-inner > div { display: flex; gap: 22px; }

@media (max-width: 900px) {
  .main-nav { display: none; }
  .nav-cta { margin-left: auto; }
  .hero-shell { min-height: auto; grid-template-columns: 1fr; padding: 54px 0 68px; gap: 44px; }
  .hero-copy { max-width: 680px; }
  .hero-visual { width: min(620px, 100%); }
  .trust-grid { grid-template-columns: 1fr 1fr; padding-block: 14px; }
  .trust-grid div, .trust-grid div:first-child { padding: 16px 20px; border-left: 0; }
  .split-heading, .feature-layout, .workflow-layout, .faq-layout { grid-template-columns: 1fr; gap: 34px; }
  .section { padding: 78px 0; }
}

@media (max-width: 560px) {
  .section-shell, .nav-shell, .hero-shell { width: min(calc(100% - 32px), 1180px); }
  .site-header { height: 62px; }
  .nav-shell { gap: 12px; }
  .brand { font-size: 18px; }
  .brand img { width: 28px; height: 28px; }
  .nav-cta { padding: 8px 12px; font-size: 13px; }
  .hero-shell { padding-top: 46px; }
  h1 { max-width: 100%; overflow-wrap: anywhere; font-size: 36px; letter-spacing: -0.045em; }
  .hero-lead { font-size: 16px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .hero-visual { border-radius: 20px; }
  .visual-status { right: 12px; bottom: 12px; }
  .visual-label { top: 12px; left: 12px; }
  .trust-grid { grid-template-columns: 1fr 1fr; }
  .trust-grid div, .trust-grid div:first-child { padding: 14px 8px; }
  .feature-primary { min-height: 330px; }
  .endpoint-box code { font-size: 12px; }
  .final-cta-inner { padding: 32px 26px; align-items: flex-start; flex-direction: column; }
  .footer-inner { padding: 28px 0; align-items: flex-start; flex-wrap: wrap; }
  .footer-inner p { width: 100%; order: 3; }
}

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