:root {
  color-scheme: light;
  --blue: #0b4fe8;
  --blue-dark: #062b92;
  --blue-soft: #eaf1ff;
  --ink: #12213f;
  --muted: #5f6f8f;
  --line: #dbe4f3;
  --paper: #ffffff;
  --surface: #f5f8fd;
  --orange: #ffbd22;
  --shadow: 0 24px 70px rgba(9, 46, 126, .12);
  font-family: Inter, "SF Pro Display", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; color: var(--ink); background: var(--paper); line-height: 1.65; -webkit-font-smoothing: antialiased; }
body.nav-open { overflow: hidden; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }
.container { width: min(1160px, calc(100% - 48px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 1000; top: 12px; left: 12px; padding: 10px 16px; color: #fff; background: #111827; border-radius: 8px; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.site-header { position: sticky; z-index: 100; top: 0; height: 78px; color: var(--ink); background: rgba(255,255,255,.9); border-bottom: 1px solid rgba(219,228,243,.75); backdrop-filter: blur(18px); transition: box-shadow .2s ease; }
.site-header.is-scrolled { box-shadow: 0 10px 35px rgba(13,41,104,.08); }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand img { border-radius: 13px; box-shadow: 0 7px 20px rgba(11,79,232,.2); }
.brand span { display: grid; line-height: 1.1; }
.brand strong { font-size: 18px; letter-spacing: .04em; }
.brand small { margin-top: 5px; color: var(--muted); font-size: 11px; letter-spacing: .08em; }
.site-nav { display: flex; align-items: center; gap: 30px; font-size: 14px; font-weight: 600; }
.site-nav > a:not(.nav-cta) { position: relative; }
.site-nav > a:not(.nav-cta)::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -7px; height: 2px; background: var(--blue); transition: right .2s ease; }
.site-nav > a:not(.nav-cta):hover::after, .site-nav > a:not(.nav-cta):focus-visible::after { right: 0; }
.nav-cta { padding: 10px 18px; color: #fff; background: var(--blue); border-radius: 999px; box-shadow: 0 8px 20px rgba(11,79,232,.2); }
.nav-toggle { display: none; width: 44px; height: 44px; padding: 10px; background: none; border: 0; border-radius: 10px; }
.nav-toggle i { display: block; height: 2px; margin: 5px 0; background: currentColor; border-radius: 99px; }

.hero { position: relative; min-height: 660px; display: grid; align-items: center; overflow: hidden; color: #fff; background: #073cbe; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(3,22,93,.74) 0%, rgba(3,22,93,.36) 38%, rgba(3,22,93,.03) 68%); }
.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-content { position: relative; z-index: 1; padding-block: 90px; }
.eyebrow, .section-kicker { margin: 0 0 16px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.hero .eyebrow { color: #bcd2ff; }
.hero h1 { max-width: 700px; margin: 0; font-size: clamp(46px, 6vw, 78px); line-height: 1.1; letter-spacing: -.055em; }
.hero-lead { max-width: 610px; margin: 28px 0 0; color: rgba(255,255,255,.83); font-size: 19px; line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 24px; border: 1px solid transparent; border-radius: 12px; font-size: 15px; font-weight: 750; transition: transform .2s ease, background .2s ease, box-shadow .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-light { color: var(--blue-dark); background: #fff; box-shadow: 0 12px 30px rgba(0,0,0,.13); }
.button-ghost { color: #fff; border-color: rgba(255,255,255,.45); background: rgba(255,255,255,.08); backdrop-filter: blur(8px); }
.button-ghost:hover { background: rgba(255,255,255,.16); }
.hero-note { display: flex; align-items: center; gap: 9px; margin: 24px 0 0; color: rgba(255,255,255,.68); font-size: 13px; }
.hero-note span { width: 7px; height: 7px; background: #70e4ad; border-radius: 50%; box-shadow: 0 0 0 5px rgba(112,228,173,.13); }

.trust-strip { border-bottom: 1px solid var(--line); background: #fff; }
.trust-grid { min-height: 116px; display: grid; grid-template-columns: repeat(3, 1fr); align-items: center; }
.trust-grid div { display: grid; gap: 5px; padding: 0 34px; border-right: 1px solid var(--line); }
.trust-grid div:first-child { padding-left: 0; }
.trust-grid div:last-child { border-right: 0; }
.trust-grid strong { font-size: 16px; }
.trust-grid span { color: var(--muted); font-size: 13px; }

.section { padding: 110px 0; }
.section h2 { margin: 0; font-size: clamp(34px, 4vw, 54px); line-height: 1.18; letter-spacing: -.045em; }
.split-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 100px; align-items: end; }
.intro-copy { padding-bottom: 4px; }
.intro-copy p { margin: 0 0 18px; color: var(--muted); font-size: 17px; }
.intro-copy p:last-child { margin-bottom: 0; }

.features-section { background: var(--surface); }
.features-section h2 { margin-bottom: 50px; }
.feature-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.feature-card { min-height: 265px; display: flex; flex-direction: column; padding: 30px; background: #fff; border: 1px solid var(--line); border-radius: 20px; transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease; }
.feature-card:hover { transform: translateY(-5px); border-color: #b9cbef; box-shadow: var(--shadow); }
.feature-card.feature-primary { color: #fff; background: var(--blue); border-color: var(--blue); }
.feature-index { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .14em; }
.feature-primary .feature-index { color: #bcd2ff; }
.feature-card h3 { margin: auto 0 12px; font-size: 23px; letter-spacing: -.02em; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; }
.feature-primary p { color: rgba(255,255,255,.72); }

.privacy-promise { padding-block: 86px; }
.promise-card { display: grid; grid-template-columns: auto 1fr auto; gap: 28px; align-items: center; padding: 46px 50px; background: linear-gradient(135deg, #eff5ff, #f7faff); border: 1px solid #d5e2fb; border-radius: 24px; }
.promise-mark { width: 64px; height: 64px; display: grid; place-items: center; color: #fff; background: var(--blue); border-radius: 20px; font-size: 28px; font-weight: 800; box-shadow: 0 14px 35px rgba(11,79,232,.22); }
.promise-card .section-kicker { margin-bottom: 8px; }
.promise-card h2 { font-size: clamp(28px, 3vw, 38px); }
.promise-card p:not(.section-kicker) { max-width: 680px; margin: 12px 0 0; color: var(--muted); }
.text-link { color: var(--blue); font-size: 14px; font-weight: 800; white-space: nowrap; }
.text-link span { margin-left: 5px; }

.developer-section { color: #fff; background: #0a1d49; }
.developer-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 80px; align-items: center; }
.developer-card { max-width: 610px; }
.dev-badge { display: inline-block; margin-bottom: 22px; padding: 7px 13px; color: #bcd2ff; background: rgba(78,126,255,.16); border: 1px solid rgba(123,160,255,.3); border-radius: 999px; font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.developer-card p { margin: 28px 0 0; color: #aebbd7; font-size: 17px; }
.contact-panel { padding: 34px; color: var(--ink); background: #fff; border-radius: 22px; box-shadow: 0 24px 70px rgba(0,0,0,.18); }
.contact-panel dl { margin: 0; }
.contact-panel dl > div { display: grid; grid-template-columns: 92px 1fr; gap: 20px; padding: 15px 0; border-bottom: 1px solid var(--line); }
.contact-panel dt { color: var(--muted); font-size: 13px; }
.contact-panel dd { margin: 0; font-size: 14px; font-weight: 700; word-break: break-word; }
.contact-panel dd a { color: var(--blue); }
.contact-note { margin: 20px 0 0; color: var(--muted); font-size: 12px; }

.legal-links { background: #fff; }
.legal-links h2 { margin-bottom: 42px; }
.legal-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.legal-grid a { position: relative; display: grid; gap: 6px; padding: 26px 64px 26px 26px; background: var(--surface); border: 1px solid var(--line); border-radius: 16px; transition: border-color .2s ease, background .2s ease; }
.legal-grid a:hover { background: var(--blue-soft); border-color: #b8cbee; }
.legal-grid strong { font-size: 17px; }
.legal-grid span { color: var(--muted); font-size: 13px; }
.legal-grid i { position: absolute; top: 50%; right: 26px; color: var(--blue); font-style: normal; font-size: 22px; transform: translateY(-50%); }

.site-footer { color: #cad4e8; background: #07132f; }
.footer-main { min-height: 150px; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.footer-brand { display: flex; align-items: center; gap: 15px; }
.footer-brand img { border-radius: 15px; }
.footer-brand div { display: grid; }
.footer-brand strong { color: #fff; font-size: 18px; }
.footer-brand span { color: #7f90b0; font-size: 12px; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 28px; font-size: 13px; }
.footer-links a:hover, .footer-bottom a:hover { color: #fff; }
.footer-bottom { min-height: 64px; display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 10px 24px; color: #7181a0; border-top: 1px solid rgba(255,255,255,.09); font-size: 12px; }
.footer-bottom a { color: #9cafcf; }

.legal-page { min-height: 100vh; background: var(--surface); }
.page-hero { padding: 76px 0 54px; color: #fff; background: linear-gradient(135deg, #092b8d, #0b5af2); }
.page-hero .breadcrumb { margin: 0 0 16px; color: #bcd2ff; font-size: 13px; }
.page-hero .breadcrumb a:hover { color: #fff; }
.page-hero h1 { margin: 0; font-size: clamp(36px, 5vw, 56px); line-height: 1.16; letter-spacing: -.04em; }
.page-hero p { max-width: 680px; margin: 18px 0 0; color: rgba(255,255,255,.76); }
.document-wrap { padding: 48px 0 90px; }
.document { max-width: 900px; margin: 0 auto; padding: 46px 54px; background: #fff; border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 18px 55px rgba(16,48,112,.08); }
.document .doc-meta { margin: 0 0 26px; padding-bottom: 22px; color: var(--muted); border-bottom: 1px solid var(--line); font-size: 13px; }
.document .summary { margin-bottom: 30px; padding: 18px 20px; background: var(--blue-soft); border-left: 4px solid var(--blue); border-radius: 8px; }
.document h2 { margin: 38px 0 14px; color: var(--ink); font-size: 22px; line-height: 1.4; }
.document h3 { margin: 25px 0 8px; font-size: 17px; }
.document p, .document li { color: #445270; font-size: 15px; }
.document a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.document li + li { margin-top: 7px; }
.document table { width: 100%; margin: 20px 0; border-collapse: collapse; font-size: 14px; }
.document th, .document td { padding: 13px 14px; text-align: left; vertical-align: top; border: 1px solid var(--line); }
.document th { background: var(--surface); }
.doc-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; padding-top: 25px; border-top: 1px solid var(--line); }
.doc-actions a { text-decoration: none; }
.doc-actions .button { color: #fff; background: var(--blue); }
.doc-actions .button-secondary { color: var(--blue); background: var(--blue-soft); }

.support-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 20px; }
.support-card { padding: 28px; background: #fff; border: 1px solid var(--line); border-radius: 18px; }
.support-card h2 { margin: 0 0 16px; font-size: 22px; }
.support-card p { color: var(--muted); }
.support-card ul { margin: 18px 0 0; padding-left: 20px; color: #445270; }
.support-card.primary { color: #fff; background: var(--blue); border-color: var(--blue); }
.support-card.primary p { color: rgba(255,255,255,.74); }
.support-card.primary a { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.faq-list { grid-column: 1 / -1; }
.faq-item { padding: 20px 0; border-bottom: 1px solid var(--line); }
.faq-item:last-child { border-bottom: 0; }
.faq-item h3 { margin: 0 0 7px; font-size: 16px; }
.faq-item p { margin: 0; }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .site-nav { position: fixed; top: 78px; left: 0; right: 0; bottom: 0; display: none; align-content: start; flex-direction: column; align-items: stretch; gap: 0; padding: 20px 24px; background: #fff; }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 16px 6px; border-bottom: 1px solid var(--line); }
  .site-nav .nav-cta { margin-top: 14px; padding: 13px 18px; text-align: center; border-bottom: 0; }
  .hero { min-height: 610px; }
  .hero-bg { object-position: 58% center; }
  .hero::after { background: linear-gradient(90deg, rgba(3,22,93,.82), rgba(3,22,93,.46) 60%, rgba(3,22,93,.14)); }
  .split-layout, .developer-grid, .support-grid { grid-template-columns: 1fr; gap: 42px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .promise-card { grid-template-columns: auto 1fr; }
  .promise-card .text-link { grid-column: 2; }
}

@media (max-width: 640px) {
  .container { width: min(100% - 32px, 1160px); }
  .site-header { height: 70px; }
  .site-nav { top: 70px; }
  .hero { min-height: 650px; align-items: end; }
  .hero-bg { object-position: 64% center; }
  .hero::after { background: linear-gradient(180deg, rgba(4,27,98,.16) 4%, rgba(4,27,98,.58) 47%, rgba(3,22,83,.94) 100%); }
  .hero-content { padding-block: 190px 56px; }
  .hero h1 { font-size: 45px; }
  .hero-lead { font-size: 16px; }
  .hero-actions { display: grid; }
  .trust-grid { grid-template-columns: 1fr; padding-block: 16px; }
  .trust-grid div, .trust-grid div:first-child { padding: 16px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .trust-grid div:last-child { border-bottom: 0; }
  .section { padding: 78px 0; }
  .section h2 { font-size: 36px; }
  .feature-grid, .legal-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 220px; }
  .promise-card { grid-template-columns: 1fr; padding: 30px 24px; }
  .promise-card .text-link { grid-column: auto; }
  .developer-grid { gap: 48px; }
  .contact-panel { padding: 25px 22px; }
  .contact-panel dl > div { grid-template-columns: 1fr; gap: 3px; }
  .footer-main { align-items: flex-start; flex-direction: column; padding-block: 34px; }
  .footer-links { justify-content: flex-start; gap: 18px 24px; }
  .footer-bottom { justify-content: flex-start; padding-block: 18px; }
  .page-hero { padding: 52px 0 40px; }
  .document-wrap { padding: 24px 0 60px; }
  .document { padding: 28px 21px; border-radius: 14px; }
  .document h2 { font-size: 20px; }
  .document table { display: block; overflow-x: auto; }
}

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