:root {
  --blue: #155EEF;
  --blue-deep: #123A75;
  --text: #15243B;
  --text-body: #52627A;
  --bg-pale: #F4F8FF;
  --white: #FFFFFF;
  --border: #E2EAF4;
  --border-strong: #C9D6E8;
  --success: #16845B;
  --success-bg: #E7F5EE;
  --error: #B42318;
  --error-bg: #FDECEA;
  --warn: #8A6100;
  --warn-bg: #FFF6E0;
  --info-bg: #EAF1FF;
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(21,36,59,.05);
  --shadow: 0 2px 8px rgba(21,36,59,.06);
  --shadow-lg: 0 8px 24px rgba(21,36,59,.08);
  --container: 1180px;
  --reading: 720px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --t-fast: 120ms ease;
  --t-med: 200ms ease;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  color: var(--text-body);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-wrap: break-word;
}
img, svg { max-width: 100%; display: block; }
button, input, textarea, select { font: inherit; color: inherit; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { color: var(--text); line-height: 1.22; margin: 0 0 .5em; font-weight: 700; letter-spacing: -0.011em; }
h1 { font-size: clamp(1.8rem, 2.6vw + 1rem, 2.9rem); }
h2 { font-size: clamp(1.35rem, 1.2vw + 1rem, 1.85rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
code, pre, kbd { font-family: var(--font-mono); font-size: .92em; }
pre { background: var(--bg-pale); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; overflow-x: auto; font-size: .85rem; line-height: 1.5; }
code { background: var(--bg-pale); padding: 1px 6px; border-radius: 4px; border: 1px solid var(--border); }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: -9999px; top: 8px;
  background: var(--blue); color: #fff; padding: 10px 16px;
  border-radius: var(--radius-sm); z-index: 1000; font-weight: 600;
}
.skip-link:focus { left: 8px; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.narrow { max-width: var(--reading); }
.section { padding: 64px 0; }
.section--tight { padding: 40px 0; }
.section--pale { background: var(--bg-pale); }
.section-head { max-width: 740px; margin: 0 auto 40px; text-align: center; }
.section-head p { margin: 0; }
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.94);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--border);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; height: 68px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand__logo { width: 34px; height: 34px; border-radius: 8px; }
.brand__name { font-weight: 700; font-size: 1.05rem; letter-spacing: -0.011em; color: var(--text); }
.brand__name span { color: var(--blue); }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  color: var(--text); font-weight: 500; font-size: .92rem;
  padding: 10px 12px; border-radius: var(--radius-sm);
  transition: background var(--t-fast), color var(--t-fast);
}
.nav a:hover { background: var(--bg-pale); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--blue); }
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--border); background: var(--white);
  border-radius: var(--radius-sm); cursor: pointer;
  align-items: center; justify-content: center;
}
.nav-toggle:hover { background: var(--bg-pale); }
@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    display: none;
    position: absolute; top: 68px; right: 20px; left: 20px;
    background: var(--white); border: 1px solid var(--border);
    border-radius: var(--radius); box-shadow: var(--shadow-lg);
    flex-direction: column; align-items: stretch; padding: 8px;
    max-height: calc(100vh - 90px); overflow-y: auto;
  }
  .nav.nav--open { display: flex; }
  .nav a { padding: 14px 12px; }
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 0 20px;
  border-radius: var(--radius-sm); border: 1px solid transparent;
  font-weight: 600; font-size: .95rem; cursor: pointer;
  transition: transform var(--t-fast), background var(--t-fast), border-color var(--t-fast);
  text-decoration: none; white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn--primary { background: var(--blue); color: #fff; }
.btn--primary:hover { background: #1048c4; text-decoration: none; }
.btn--ghost { background: var(--white); color: var(--text); border-color: var(--border-strong); }
.btn--ghost:hover { background: var(--bg-pale); text-decoration: none; }
.btn--subtle { background: var(--bg-pale); color: var(--blue-deep); border-color: var(--border); }
.btn--subtle:hover { background: #E4EEFF; text-decoration: none; }
.btn--sm { min-height: 38px; padding: 0 14px; font-size: .875rem; }
.hero {
  padding: 72px 0 56px;
  background:
    radial-gradient(circle at 20% 0%, #EAF1FF 0%, transparent 45%),
    radial-gradient(circle at 80% 100%, #EAF1FF 0%, transparent 40%),
    var(--white);
  border-bottom: 1px solid var(--border);
}
.hero__inner { max-width: 840px; margin: 0 auto; text-align: center; }
.hero__eyebrow {
  display: inline-block;
  padding: 6px 12px; margin-bottom: 20px;
  font-size: .8rem; font-weight: 600; letter-spacing: .02em;
  color: var(--blue-deep); background: var(--info-bg);
  border: 1px solid #D5E3FF; border-radius: 999px;
}
.hero h1 { margin-bottom: 16px; }
.hero p { font-size: 1.12rem; max-width: 660px; margin: 0 auto 28px; }
.hero__ctas { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-bottom: 24px; }
.hero__meta {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 18px;
  font-size: .875rem; color: var(--text-body); margin-top: 8px;
}
.hero__meta span { display: inline-flex; align-items: center; gap: 6px; }
.hero__meta svg { color: var(--success); }
.grid { display: grid; gap: 16px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px) { .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; } }
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--t-med), border-color var(--t-med), transform var(--t-med);
}
.card--link:hover, .card--link:focus-within {
  box-shadow: var(--shadow);
  border-color: #CFDDF3;
  transform: translateY(-1px);
}
.card h3 { margin-bottom: 6px; }
.card p { margin: 0; font-size: .95rem; }
.card__icon {
  display: inline-flex; width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border-radius: 10px; background: var(--info-bg); color: var(--blue);
  margin-bottom: 16px;
}
.tool-card {
  display: flex; flex-direction: column;
  gap: 6px; min-height: 132px;
  background: var(--white); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 20px;
  text-decoration: none; color: var(--text);
  transition: box-shadow var(--t-med), border-color var(--t-med), transform var(--t-med);
}
.tool-card:hover { text-decoration: none; border-color: #CFDDF3; box-shadow: var(--shadow); transform: translateY(-1px); }
.tool-card h3 { font-size: 1rem; margin: 0 0 4px; color: var(--text); }
.tool-card p { font-size: .875rem; margin: 0; color: var(--text-body); }
.tool-card__tag {
  display: inline-block; margin-top: auto;
  font-size: .72rem; font-weight: 600; letter-spacing: .04em;
  text-transform: uppercase; color: var(--blue-deep);
  background: var(--info-bg); padding: 3px 8px; border-radius: 999px;
  width: fit-content; align-self: flex-start;
}
.search-box { position: relative; max-width: 560px; margin: 0 auto 32px; }
.search-box input {
  width: 100%; height: 52px; padding: 0 16px 0 48px;
  border: 1px solid var(--border-strong); border-radius: var(--radius);
  background: var(--white); font-size: 1rem;
}
.search-box input:focus {
  outline: none; border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(21,94,239,.15);
}
.search-box svg {
  position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  width: 20px; height: 20px; color: var(--text-body); pointer-events: none;
}
.search-box__empty {
  text-align: center; padding: 32px 20px; color: var(--text-body);
  background: var(--bg-pale); border: 1px dashed var(--border-strong);
  border-radius: var(--radius);
}
.feature { display: flex; gap: 16px; align-items: flex-start; }
.feature__icon {
  flex-shrink: 0; width: 40px; height: 40px; border-radius: 10px;
  background: var(--info-bg); color: var(--blue);
  display: inline-flex; align-items: center; justify-content: center;
}
.feature h3 { margin-bottom: 6px; font-size: 1rem; }
.feature p { margin: 0; font-size: .95rem; }
.step { text-align: center; }
.step__num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 999px;
  background: var(--blue); color: #fff; font-weight: 700;
  margin-bottom: 16px;
}
.faq { max-width: 760px; margin: 0 auto; }
.faq details {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 0 20px; margin-bottom: 10px; background: var(--white);
}
.faq details[open] { border-color: #CFDDF3; }
.faq summary {
  cursor: pointer; list-style: none; padding: 16px 0;
  font-weight: 600; color: var(--text);
  display: flex; justify-content: space-between; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 1.35rem; color: var(--blue); line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq details p { padding-bottom: 16px; margin: 0; }
.breadcrumbs { padding: 18px 0 0; font-size: .85rem; color: var(--text-body); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; padding: 0; margin: 0; }
.breadcrumbs li { display: inline-flex; align-items: center; gap: 6px; }
.breadcrumbs li + li::before { content: "/"; color: var(--border-strong); }
.site-footer {
  margin-top: 80px;
  background: var(--bg-pale);
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
  font-size: .9rem;
}
.footer-grid {
  display: grid; gap: 32px;
  grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr 1fr;
  margin-bottom: 32px;
}
@media (max-width: 1080px) { .footer-grid { grid-template-columns: 1fr 1fr 1fr; } }
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-brand p { margin-top: 12px; max-width: 320px; }
.footer-col h4 {
  font-size: .78rem; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--text-body);
  margin: 0 0 12px;
}
.footer-col ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.footer-col a { color: var(--text); font-size: .875rem; }
.footer-col a:hover { color: var(--blue); }
.footer-bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between;
  gap: 12px; padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: .85rem; color: var(--text-body);
}
.text-center { text-align: center; }
.hidden { display: none !important; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; border-radius: var(--radius-sm); }
.reduce-motion *, .reduce-motion *::before, .reduce-motion *::after {
  animation-duration: 0.001ms !important;
  transition-duration: 0.001ms !important;
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}
@media (max-width: 480px) {
  .site-header__inner { height: 60px; }
  .nav { top: 60px; }
  .hero { padding: 48px 0 36px; }
  .hero p { font-size: 1rem; }
  .section { padding: 48px 0; }
  .btn { padding: 0 16px; }
}