:root {
  color-scheme: light;
  --font-sans: "SF Pro Text", "PingFang SC", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --blue: #1a73e8;
  --blue-strong: #0b57d0;
  --warm: #e84a2a;
  --ink: #202124;
  --muted: #5f6368;
  --line: #d9e1ec;
  --wash: #f6f9fd;
  --surface: #ffffff;
  --shadow: 0 18px 50px rgba(43, 70, 105, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--blue-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: #073d94;
}

a:focus-visible,
summary:focus-visible {
  outline: 3px solid #101820;
  outline-offset: 4px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 8px 14px;
  color: #fff;
  background: #101820;
  border-radius: 8px;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.seo-header {
  border-bottom: 1px solid #edf1f6;
  background: rgba(255, 255, 255, 0.96);
}

.seo-header-inner,
.seo-main,
.seo-footer-inner {
  width: min(1120px, calc(100% - 40px));
  margin-inline: auto;
}

.seo-header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.seo-brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 48px;
}

.seo-brand img {
  display: block;
  width: auto;
  max-width: 176px;
  height: 42px;
  object-fit: contain;
  object-position: left center;
}

.seo-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 4px 18px;
}

.seo-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: #3c4858;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

.seo-nav a:hover {
  color: var(--blue-strong);
}

.seo-main {
  padding-block: 42px 80px;
}

.seo-hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  align-items: center;
  gap: clamp(32px, 6vw, 84px);
  padding: clamp(34px, 6vw, 72px);
  border: 1px solid #e1ebf7;
  border-radius: 30px;
  background:
    radial-gradient(circle at 92% 8%, rgba(26, 115, 232, 0.17), transparent 32%),
    linear-gradient(145deg, #ffffff 0%, #f4f8ff 56%, #eef7ff 100%);
  box-shadow: var(--shadow);
}

.seo-eyebrow {
  margin: 0 0 12px;
  color: var(--blue-strong);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.seo-hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(36px, 5vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.045em;
}

.seo-lead {
  max-width: 710px;
  margin: 22px 0 0;
  color: #465467;
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.75;
}

.seo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.seo-button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: 1px solid var(--blue);
  border-radius: 12px;
  color: #fff;
  background: var(--blue);
  font-weight: 800;
  text-decoration: none;
}

.seo-button:hover {
  color: #fff;
  background: var(--blue-strong);
}

.seo-button-secondary {
  color: var(--blue-strong);
  background: #fff;
}

.seo-button-secondary:hover {
  color: #073d94;
  background: #f5f9ff;
}

.seo-hero-mark {
  justify-self: center;
  width: min(100%, 220px);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  padding: 24px;
  border: 1px solid rgba(26, 115, 232, 0.14);
  border-radius: 32px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 24px 60px rgba(26, 115, 232, 0.12);
}

.seo-hero-mark img {
  display: block;
  width: 100%;
  height: 100%;
}

.seo-section {
  padding-top: clamp(58px, 8vw, 88px);
}

.seo-section > h2,
.seo-section-heading h2 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(28px, 3.5vw, 42px);
  line-height: 1.25;
  letter-spacing: -0.03em;
}

.seo-section-heading p {
  max-width: 740px;
  margin: 14px 0 0;
  color: var(--muted);
}

.seo-prose {
  max-width: 760px;
}

.seo-prose p {
  margin: 18px 0 0;
  color: #3f4a59;
}

.seo-prose h2 {
  margin-top: 58px;
}

.seo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.seo-card,
.seo-step,
.seo-faq {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}

.seo-card {
  padding: 26px;
}

.seo-card h3,
.seo-step h3,
.seo-faq h3 {
  margin: 0;
  font-size: 19px;
  line-height: 1.45;
}

.seo-card p,
.seo-step p,
.seo-faq p {
  margin: 10px 0 0;
  color: var(--muted);
}

.seo-steps {
  counter-reset: seo-step;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.seo-step {
  position: relative;
  padding: 26px 26px 26px 72px;
  counter-increment: seo-step;
}

.seo-step::before {
  content: counter(seo-step);
  position: absolute;
  top: 24px;
  left: 24px;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--blue);
  font-size: 14px;
  font-weight: 900;
}

.seo-related {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.seo-related a {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  border: 1px solid #dce8f7;
  border-radius: 16px;
  color: #173b6c;
  background: #f7fbff;
  font-weight: 800;
  text-decoration: none;
}

.seo-related a::after {
  content: "→";
  color: var(--blue);
  font-size: 22px;
}

.seo-related a:hover {
  border-color: #9fc2ee;
  background: #eef6ff;
}

.seo-footer {
  border-top: 1px solid #e6ebf1;
  background: var(--wash);
}

.seo-footer-inner {
  padding-block: 34px 42px;
}

.seo-footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

.seo-footer-nav a {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  color: #34445a;
  font-weight: 700;
  text-decoration: none;
}

.seo-footer p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 860px) {
  .seo-header-inner {
    padding-block: 12px;
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .seo-nav {
    width: 100%;
    justify-content: flex-start;
  }

  .seo-hero {
    grid-template-columns: 1fr;
  }

  .seo-hero-mark {
    width: 168px;
    grid-row: 1;
    justify-self: start;
  }

  .seo-grid,
  .seo-related {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .seo-brand img {
    max-width: 145px;
    height: 35px;
  }

  .seo-header-inner,
  .seo-main,
  .seo-footer-inner {
    width: min(100% - 28px, 1120px);
  }

  .seo-main {
    padding-top: 22px;
  }

  .seo-nav {
    gap: 0 14px;
  }

  .seo-nav a {
    min-height: 40px;
    font-size: 13px;
  }

  .seo-hero {
    padding: 28px 22px 34px;
    border-radius: 22px;
  }

  .seo-hero-mark {
    width: 120px;
    padding: 12px;
    border-radius: 24px;
  }

  .seo-grid,
  .seo-steps,
  .seo-related {
    grid-template-columns: 1fr;
  }

  .seo-card,
  .seo-step {
    padding-top: 22px;
    padding-bottom: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}