:root {
  color-scheme: dark;
  --bg: #080d18;
  --surface: rgba(17, 26, 45, 0.82);
  --surface-strong: #111a2d;
  --line: rgba(148, 163, 184, 0.14);
  --text: #eef2ff;
  --muted: #8d9bb0;
  --subtle: #64748b;
  --violet: #8f80ff;
  --violet-soft: rgba(124, 108, 255, 0.14);
  --teal: #2bc4a4;
  --yellow: #e4d521;
  --orange: #ff920c;
  --max-width: 1140px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  min-width: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 8% 4%, rgba(60, 78, 180, 0.16), transparent 30%),
    linear-gradient(rgba(100, 116, 139, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(100, 116, 139, 0.035) 1px, transparent 1px),
    var(--bg);
  background-size: auto, 56px 56px, 56px 56px, auto;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.seo-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(148, 163, 184, 0.10);
  background: rgba(8, 13, 24, 0.84);
  backdrop-filter: blur(18px);
}

.seo-header-inner {
  width: min(var(--max-width), calc(100% - 40px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.seo-brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: #fff;
  font-size: 18px;
  font-weight: 750;
  letter-spacing: -0.5px;
  text-decoration: none;
}

.seo-brand img {
  width: 36px;
  height: 36px;
}

.seo-header nav {
  display: flex;
  align-items: center;
  gap: 25px;
}

.seo-header nav a {
  color: #8290a5;
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  transition: color 160ms ease;
}

.seo-header nav a:hover,
.seo-header nav a[aria-current="page"] {
  color: #b9b1ff;
}

.seo-language-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid rgba(143, 128, 255, 0.22);
  border-radius: 9px;
  background: rgba(143, 128, 255, 0.07);
}

.seo-header nav .seo-language-switch a {
  min-width: 30px;
  padding: 5px 7px;
  border-radius: 6px;
  color: #718096;
  font-size: 9px;
  font-weight: 750;
  line-height: 1;
  text-align: center;
}

.seo-header nav .seo-language-switch a:hover {
  color: #d9d5ff;
}

.seo-header nav .seo-language-switch a[aria-current="true"] {
  color: #f4f1ff;
  background: rgba(109, 91, 232, 0.52);
  box-shadow: 0 4px 15px rgba(87, 68, 213, 0.18);
}

.seo-header .seo-nav-cta {
  padding: 10px 15px;
  border: 1px solid rgba(143, 128, 255, 0.34);
  border-radius: 11px;
  color: #eeeaff;
  background: var(--violet-soft);
}

.seo-main {
  overflow: hidden;
}

.seo-hero,
.seo-article,
.seo-related,
.seo-final-cta {
  width: min(var(--max-width), calc(100% - 40px));
  margin: 0 auto;
}

.seo-hero {
  min-height: 620px;
  padding: clamp(78px, 9vw, 128px) 0 92px;
  display: grid;
  grid-template-columns: minmax(0, 0.93fr) minmax(420px, 1.07fr);
  align-items: center;
  gap: clamp(54px, 8vw, 112px);
}

.seo-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  color: #64748b;
  font-size: 11px;
}

.seo-breadcrumbs a {
  color: #8f9db1;
  text-decoration: none;
}

.seo-breadcrumbs a:hover {
  color: #b9b1ff;
}

.seo-kicker {
  display: inline-flex;
  margin-top: 34px;
  padding: 7px 12px;
  border: 1px solid rgba(143, 128, 255, 0.28);
  border-radius: 999px;
  color: #aaa0ff;
  background: rgba(124, 108, 255, 0.08);
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 1.35px;
}

.seo-hero h1 {
  max-width: 760px;
  margin-top: 22px;
  color: #f8fafc;
  font-size: clamp(42px, 5.6vw, 72px);
  line-height: 0.99;
  letter-spacing: clamp(-3.8px, -0.05em, -2px);
}

.seo-hero-lead {
  max-width: 660px;
  margin-top: 25px;
  color: #95a3b8;
  font-size: clamp(16px, 1.8vw, 19px);
  line-height: 1.72;
}

.seo-hero-actions {
  margin-top: 33px;
  display: flex;
  flex-wrap: wrap;
  gap: 11px;
}

.seo-button {
  min-height: 46px;
  padding: 0 19px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: #d8deea;
  background: rgba(15, 23, 42, 0.62);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease;
}

.seo-button:hover {
  transform: translateY(-2px);
  border-color: rgba(143, 128, 255, 0.42);
}

.seo-button-primary {
  border-color: transparent;
  color: white;
  background: linear-gradient(135deg, #6958f5, #9182ff);
  box-shadow: 0 16px 36px rgba(90, 74, 224, 0.24);
}

.seo-hero-meta {
  margin-top: 31px;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: #637288;
  font-size: 10px;
}

.seo-hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.seo-hero-meta i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 12px rgba(43, 196, 164, 0.72);
}

.seo-map-card {
  position: relative;
  min-height: 430px;
  padding: 24px;
  overflow: hidden;
  border: 1px solid rgba(143, 128, 255, 0.17);
  border-radius: 30px;
  background:
    radial-gradient(circle at 84% 4%, rgba(124, 108, 255, 0.17), transparent 35%),
    linear-gradient(145deg, rgba(18, 28, 49, 0.92), rgba(7, 13, 24, 0.97));
  box-shadow: 0 36px 110px rgba(0, 0, 0, 0.34);
}

.seo-map-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #64748b;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.9px;
}

.seo-live {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #61d2b5;
}

.seo-live::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 11px rgba(43, 196, 164, 0.8);
}

.seo-heatmap {
  position: absolute;
  inset: 74px 24px 64px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 94%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 94%, transparent);
}

.seo-heatmap span {
  display: block;
  height: 7px;
  border-radius: 999px;
  opacity: 0.78;
  animation: seoBand 7s ease-in-out infinite;
}

.seo-heatmap span:nth-child(1) { width: 92%; background: linear-gradient(90deg, #08718b, #6cbb34, #f0d51e); }
.seo-heatmap span:nth-child(2) { width: 72%; margin-left: 18%; background: linear-gradient(90deg, #07508c, #15945f); animation-delay: -4s; }
.seo-heatmap span:nth-child(3) { width: 96%; background: linear-gradient(90deg, #0a568d, #1ba16b, #ff920c); animation-delay: -2s; }
.seo-heatmap span:nth-child(4) { width: 67%; margin-left: 7%; background: linear-gradient(90deg, #063d85, #087f8c); animation-delay: -6s; }
.seo-heatmap span:nth-child(5) { width: 84%; margin-left: 12%; background: linear-gradient(90deg, #075c94, #169d67, #d7d124); animation-delay: -1s; }
.seo-heatmap span:nth-child(6) { width: 58%; margin-left: 27%; background: linear-gradient(90deg, #063d85, #075c94); animation-delay: -5s; }
.seo-heatmap span:nth-child(7) { width: 89%; background: linear-gradient(90deg, #075c94, #087f8c); animation-delay: -3s; }
.seo-heatmap span:nth-child(8) { width: 76%; margin-left: 18%; background: linear-gradient(90deg, #075c94, #1a9c6a, #e4d521); animation-delay: -7s; }
.seo-heatmap span:nth-child(9) { width: 95%; background: linear-gradient(90deg, #063d85, #08718b, #63b93b); animation-delay: -2.5s; }
.seo-heatmap span:nth-child(10) { width: 63%; margin-left: 8%; background: linear-gradient(90deg, #07508c, #075c94); animation-delay: -4.5s; }
.seo-heatmap span:nth-child(11) { width: 87%; margin-left: 11%; background: linear-gradient(90deg, #075c94, #169d67, #ff920c); animation-delay: -1.5s; }

.seo-price-path {
  position: absolute;
  inset: 105px 52px 94px;
  z-index: 2;
}

.seo-price-path svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.seo-price-path path {
  fill: none;
  stroke: url(#seo-price-gradient);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 8px rgba(124, 108, 255, 0.38));
}

.seo-map-foot {
  position: absolute;
  right: 24px;
  bottom: 22px;
  left: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #5e6c80;
  font-size: 9px;
}

.seo-map-foot strong {
  color: #7fd8bf;
  font-size: 10px;
}

.seo-article-wrap {
  padding: 84px 0 20px;
  border-top: 1px solid rgba(148, 163, 184, 0.09);
  background: rgba(6, 11, 20, 0.34);
}

.seo-article {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(220px, 1fr);
  align-items: start;
  gap: clamp(54px, 8vw, 105px);
}

.seo-copy,
.seo-toc,
.seo-table-wrap {
  min-width: 0;
  max-width: 100%;
}

.seo-copy section + section {
  margin-top: 68px;
}

.seo-copy h2 {
  color: #f1f5f9;
  font-size: clamp(28px, 3.4vw, 39px);
  line-height: 1.13;
  letter-spacing: -1.5px;
}

.seo-copy h3 {
  margin-top: 34px;
  color: #e3e8f2;
  font-size: 20px;
  line-height: 1.3;
  letter-spacing: -0.5px;
}

.seo-copy p,
.seo-copy li {
  color: #8d9bb0;
  font-size: 15px;
  line-height: 1.85;
}

.seo-copy p {
  margin-top: 20px;
}

.seo-copy strong {
  color: #dce3ef;
}

.seo-copy a {
  color: #aaa0ff;
  text-underline-offset: 3px;
}

.seo-copy ul,
.seo-copy ol {
  margin: 22px 0 0 20px;
}

.seo-copy li + li {
  margin-top: 12px;
}

.seo-note {
  margin-top: 28px;
  padding: 22px 23px;
  border: 1px solid rgba(143, 128, 255, 0.20);
  border-radius: 17px;
  background: linear-gradient(135deg, rgba(124, 108, 255, 0.10), rgba(15, 23, 42, 0.42));
}

.seo-note strong {
  display: block;
  color: #b8b0ff;
  font-size: 12px;
  letter-spacing: 0.3px;
}

.seo-note p {
  margin-top: 8px;
  color: #7f8da2;
  font-size: 13px;
  line-height: 1.7;
}

.seo-definition-grid,
.seo-step-grid {
  margin-top: 30px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 13px;
}

.seo-definition-card,
.seo-step-card {
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(145deg, rgba(18, 27, 47, 0.72), rgba(10, 16, 29, 0.76));
}

.seo-definition-card small,
.seo-step-card small {
  display: block;
  color: #8f80ff;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 1.2px;
}

.seo-definition-card h3,
.seo-step-card h3 {
  margin-top: 11px;
  font-size: 17px;
}

.seo-definition-card p,
.seo-step-card p {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.72;
}

.seo-table-wrap {
  margin-top: 28px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 18px;
}

.seo-table {
  width: 100%;
  min-width: 650px;
  border-collapse: collapse;
  background: rgba(10, 16, 29, 0.66);
}

.seo-table th,
.seo-table td {
  padding: 17px 18px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.10);
  text-align: left;
  vertical-align: top;
}

.seo-table th {
  color: #b7afff;
  background: rgba(124, 108, 255, 0.07);
  font-size: 10px;
  letter-spacing: 0.8px;
}

.seo-table td {
  color: #8492a7;
  font-size: 12px;
  line-height: 1.65;
}

.seo-table tr:last-child td {
  border-bottom: 0;
}

.seo-toc {
  position: sticky;
  top: 102px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(13, 20, 36, 0.70);
  backdrop-filter: blur(14px);
}

.seo-toc strong {
  color: #dce3ef;
  font-size: 11px;
  letter-spacing: 0.7px;
}

.seo-toc ol {
  margin-top: 15px;
  display: grid;
  gap: 12px;
  list-style: none;
}

.seo-toc a {
  color: #718096;
  font-size: 11px;
  text-decoration: none;
  transition: color 150ms ease;
}

.seo-toc a:hover {
  color: #aaa0ff;
}

.seo-toc-note {
  margin-top: 20px;
  padding-top: 17px;
  border-top: 1px solid rgba(148, 163, 184, 0.10);
  color: #526075;
  font-size: 9px;
  line-height: 1.6;
}

.seo-faq {
  margin-top: 27px;
  display: grid;
  gap: 10px;
}

.seo-faq details {
  border: 1px solid var(--line);
  border-radius: 15px;
  background: rgba(15, 23, 42, 0.48);
}

.seo-faq summary {
  position: relative;
  padding: 18px 48px 18px 19px;
  color: #dfe6f1;
  font-size: 13px;
  font-weight: 650;
  list-style: none;
  cursor: pointer;
}

.seo-faq summary::-webkit-details-marker {
  display: none;
}

.seo-faq summary::after {
  content: '+';
  position: absolute;
  top: 12px;
  right: 18px;
  color: #998cff;
  font-size: 23px;
}

.seo-faq details[open] summary::after {
  transform: rotate(45deg);
}

.seo-faq p {
  margin: 0;
  padding: 0 19px 19px;
  font-size: 13px;
  line-height: 1.75;
}

.seo-related {
  padding: 105px 0 20px;
}

.seo-section-heading {
  max-width: 710px;
}

.seo-section-heading small {
  color: #998eff;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1.3px;
}

.seo-section-heading h2 {
  margin-top: 15px;
  color: #f1f5f9;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: -1.8px;
}

.seo-related-grid {
  margin-top: 37px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 13px;
}

.seo-related-card {
  min-height: 220px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 19px;
  background:
    radial-gradient(circle at 100% 0%, rgba(124, 108, 255, 0.10), transparent 42%),
    rgba(13, 20, 36, 0.72);
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease;
}

.seo-related-card:hover {
  transform: translateY(-3px);
  border-color: rgba(143, 128, 255, 0.34);
}

.seo-related-card small {
  color: #69778b;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 1.1px;
}

.seo-related-card h3 {
  margin-top: 15px;
  color: #e8edf6;
  font-size: 18px;
  line-height: 1.25;
}

.seo-related-card p {
  margin-top: 12px;
  color: #718096;
  font-size: 12px;
  line-height: 1.7;
}

.seo-related-card strong {
  margin-top: auto;
  padding-top: 18px;
  color: #a99fff;
  font-size: 11px;
}

.seo-final-cta {
  margin-top: 92px;
  margin-bottom: 80px;
  padding: clamp(34px, 5vw, 58px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  border: 1px solid rgba(143, 128, 255, 0.22);
  border-radius: 28px;
  background:
    radial-gradient(circle at 86% 0%, rgba(124, 108, 255, 0.20), transparent 36%),
    radial-gradient(circle at 4% 110%, rgba(43, 196, 164, 0.09), transparent 34%),
    linear-gradient(145deg, rgba(23, 32, 55, 0.92), rgba(11, 18, 32, 0.96));
}

.seo-final-cta div {
  max-width: 720px;
}

.seo-final-cta small {
  color: #998eff;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 1.3px;
}

.seo-final-cta h2 {
  margin-top: 12px;
  font-size: clamp(28px, 4vw, 43px);
  line-height: 1.1;
  letter-spacing: -1.7px;
}

.seo-final-cta p {
  margin-top: 14px;
  color: #7f8da2;
  font-size: 13px;
  line-height: 1.7;
}

.seo-footer {
  border-top: 1px solid rgba(148, 163, 184, 0.10);
  background: rgba(6, 10, 18, 0.62);
}

.seo-footer-inner {
  width: min(var(--max-width), calc(100% - 40px));
  min-height: 116px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
}

.seo-footer .seo-brand {
  font-size: 15px;
}

.seo-footer .seo-brand img {
  width: 30px;
  height: 30px;
}

.seo-footer p {
  color: #526075;
  font-size: 10px;
}

.seo-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
}

.seo-footer nav a {
  color: #69778b;
  font-size: 10px;
  text-decoration: none;
}

.seo-footer nav a:hover {
  color: #aaa0ff;
}

@keyframes seoBand {
  0%, 100% { transform: translateX(-1%) scaleX(0.98); opacity: 0.62; }
  50% { transform: translateX(2%) scaleX(1.02); opacity: 0.92; }
}

@media (max-width: 920px) {
  .seo-header nav > a:not(.seo-nav-cta) {
    display: none;
  }

  .seo-hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 58px;
  }

  .seo-map-card {
    min-height: 390px;
  }

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

  .seo-toc {
    position: static;
    grid-row: 1;
  }

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

  .seo-related-card:last-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .seo-header-inner,
  .seo-hero,
  .seo-article,
  .seo-related,
  .seo-final-cta,
  .seo-footer-inner {
    width: min(100% - 28px, var(--max-width));
  }

  .seo-header-inner {
    min-height: 64px;
  }

  .seo-header nav {
    gap: 8px;
  }

  .seo-header .seo-nav-cta {
    padding: 9px 12px;
    font-size: 10px;
  }

  .seo-hero {
    padding: 58px 0 70px;
  }

  .seo-hero h1 {
    font-size: clamp(39px, 13vw, 55px);
  }

  .seo-map-card {
    min-height: 330px;
    padding: 18px;
    border-radius: 23px;
  }

  .seo-heatmap {
    inset: 62px 18px 54px;
  }

  .seo-price-path {
    inset: 91px 28px 78px;
  }

  .seo-map-foot {
    right: 18px;
    bottom: 17px;
    left: 18px;
  }

  .seo-article-wrap {
    padding-top: 62px;
  }

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

  .seo-related-card:last-child {
    grid-column: auto;
  }

  .seo-copy p,
  .seo-copy li {
    font-size: 14px;
  }

  .seo-final-cta {
    margin-top: 72px;
    margin-bottom: 56px;
    flex-direction: column;
    align-items: stretch;
  }

  .seo-final-cta .seo-button {
    width: 100%;
  }

  .seo-footer-inner {
    padding: 30px 0;
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .seo-footer nav {
    justify-content: flex-start;
  }
}

@media (max-width: 360px) {
  .seo-header-inner { gap: 8px; }

  .seo-header .seo-brand {
    flex: 0 0 auto;
    gap: 0;
    font-size: 0;
  }

  .seo-header .seo-brand img {
    width: 34px;
    height: 34px;
  }

  .seo-header nav {
    min-width: 0;
    flex: 1;
    justify-content: flex-end;
    gap: 6px;
  }

  .seo-header .seo-nav-cta {
    flex: 0 0 auto;
    padding-inline: 10px;
    white-space: nowrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}