:root {
  --ink: #07152d;
  --muted: #52627a;
  --soft: #eef4fb;
  --line: #d7e2f0;
  --blue: #176bff;
  --blue-dark: #0d43a7;
  --cyan: #21c7e8;
  --white: #ffffff;
  --warning: #fff4d8;
  --warning-line: #efb83e;
  --success: #0f7b62;
  --danger: #a6342a;
  --radius: 20px;
  --shadow: 0 22px 70px rgba(7, 21, 45, 0.12);
  --max: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-thickness: 2px;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 1000;
  border-radius: 0 0 10px 10px;
  background: var(--ink);
  color: var(--white);
  padding: 12px 18px;
}

.skip-link:focus {
  top: 0;
}

.container {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.requirements-bar {
  background: var(--ink);
  color: #d9e7ff;
  font-size: 0.9rem;
  text-align: center;
  padding: 10px 20px;
}

.requirements-bar strong {
  color: var(--white);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(215, 226, 240, 0.9);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 900;
  letter-spacing: -0.03em;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.28), transparent 42%),
    linear-gradient(135deg, var(--cyan), var(--blue));
  box-shadow: 0 8px 22px rgba(23, 107, 255, 0.25);
  position: relative;
}

.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  background: var(--white);
  border-radius: 99px;
}

.brand-mark::before {
  width: 16px;
  height: 4px;
  left: 9px;
  top: 15px;
}

.brand-mark::after {
  width: 4px;
  height: 16px;
  left: 15px;
  top: 9px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav a {
  color: #34465f;
  font-size: 0.92rem;
  font-weight: 750;
  text-decoration: none;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--blue);
}

.nav .nav-cta {
  border-radius: 999px;
  background: var(--ink);
  color: var(--white);
  padding: 10px 17px;
}

.menu-button {
  display: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
  color: var(--ink);
  padding: 9px 12px;
  font: inherit;
  font-weight: 800;
}

.hero {
  overflow: hidden;
  background:
    radial-gradient(circle at 85% 18%, rgba(33, 199, 232, 0.2), transparent 24%),
    radial-gradient(circle at 72% 62%, rgba(23, 107, 255, 0.16), transparent 34%),
    linear-gradient(180deg, #f8fbff 0%, #ffffff 100%);
  padding: 88px 0 76px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(340px, 0.8fr);
  align-items: center;
  gap: 70px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  border: 1px solid #bcd3f5;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--blue-dark);
  padding: 7px 13px;
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(33, 199, 232, 0.15);
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.12;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 820px;
  margin-bottom: 22px;
  font-size: clamp(2.7rem, 6vw, 5rem);
  font-weight: 950;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 900;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.25rem;
  font-weight: 850;
}

.accent {
  background: linear-gradient(100deg, var(--blue), #05a9ce);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  max-width: 760px;
  margin: 0 0 30px;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 12px 20px;
  font-weight: 850;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
  text-decoration: none;
}

.button-primary {
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: var(--white);
  box-shadow: 0 15px 34px rgba(23, 107, 255, 0.24);
}

.button-secondary {
  border-color: var(--line);
  background: var(--white);
  color: var(--ink);
}

.button-disabled {
  border-color: #cbd5e1;
  background: #e7edf4;
  color: #56657a;
  cursor: not-allowed;
  pointer-events: none;
}

.hero-panel {
  border: 1px solid rgba(166, 194, 231, 0.7);
  border-radius: 28px;
  background: linear-gradient(150deg, #07152d, #0d3f86);
  color: var(--white);
  box-shadow: var(--shadow);
  padding: 30px;
}

.hero-panel .kicker {
  margin: 0 0 18px;
  color: #8feafa;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-panel h2 {
  font-size: 1.65rem;
  margin-bottom: 18px;
}

.check-list,
.plain-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.check-list li {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 11px;
  padding: 12px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  color: #d9e7ff;
}

.check-list li::before {
  content: "✓";
  color: #8feafa;
  font-weight: 900;
}

.hero-panel .small {
  margin: 18px 0 0;
  color: #b9c9e4;
  font-size: 0.86rem;
}

.section {
  padding: 82px 0;
}

.section-soft {
  background: var(--soft);
}

.section-dark {
  background: var(--ink);
  color: var(--white);
}

.section-head {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 1.06rem;
}

.section-dark .section-head p {
  color: #b9c9e4;
}

.notice {
  border: 1px solid var(--warning-line);
  border-left-width: 6px;
  border-radius: 16px;
  background: var(--warning);
  padding: 20px 22px;
}

.notice strong {
  display: block;
  margin-bottom: 4px;
  color: #7b4b00;
}

.notice p {
  margin: 0;
  color: #644a1c;
}

.notice-blue {
  border-color: #8cb8f8;
  background: #edf5ff;
}

.notice-blue strong,
.notice-blue p {
  color: #123c77;
}

.space-after {
  margin-bottom: 28px;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.product-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 14px 45px rgba(7, 21, 45, 0.07);
  padding: 28px;
}

.product-card .topline,
.product-hero .topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  color: var(--blue-dark);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border-radius: 999px;
  background: #eef2f7;
  color: #44546b;
  padding: 6px 10px;
  font-size: 0.72rem;
  letter-spacing: 0;
  text-transform: none;
}

.status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #7f8da1;
}

.product-card h3 {
  margin-bottom: 8px;
  font-size: 1.75rem;
}

.product-summary {
  min-height: 55px;
  margin: 0 0 18px;
  color: var(--muted);
}

.price {
  margin-bottom: 18px;
  font-size: 2rem;
  font-weight: 950;
  letter-spacing: -0.04em;
}

.price small {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0;
}

.facts {
  display: grid;
  gap: 0;
  margin: 0 0 24px;
}

.facts div {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 14px;
  border-top: 1px solid var(--line);
  padding: 11px 0;
}

.facts dt {
  color: #34465f;
  font-size: 0.82rem;
  font-weight: 850;
}

.facts dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.product-card .actions {
  margin-top: auto;
}

.three-grid,
.two-grid,
.policy-grid {
  display: grid;
  gap: 22px;
}

.three-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.info-card {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--white);
  padding: 24px;
}

.info-card .number {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 18px;
  border-radius: 12px;
  background: #e7f1ff;
  color: var(--blue-dark);
  font-weight: 950;
}

.info-card p,
.info-card li {
  color: var(--muted);
}

.info-card p:last-child {
  margin-bottom: 0;
}

.identity-card {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 38px;
  align-items: start;
  border: 1px solid #2c4e7f;
  border-radius: 24px;
  background: linear-gradient(135deg, #0b1d3b, #102d5e);
  padding: 34px;
}

.identity-card p {
  color: #c3d2e9;
}

.identity-list {
  margin: 0;
}

.identity-list div {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding: 13px 0;
}

.identity-list dt {
  color: #91a6c5;
  font-size: 0.77rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.identity-list dd {
  margin: 4px 0 0;
  color: var(--white);
  font-weight: 800;
}

.page-hero {
  background:
    radial-gradient(circle at 80% 10%, rgba(33, 199, 232, 0.16), transparent 27%),
    linear-gradient(180deg, #f6faff, #ffffff);
  padding: 68px 0 48px;
}

.page-hero h1 {
  max-width: 900px;
  font-size: clamp(2.45rem, 5vw, 4.35rem);
}

.page-hero .lead {
  max-width: 860px;
}

.product-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(330px, 0.85fr);
  gap: 56px;
  align-items: start;
}

.purchase-panel {
  position: sticky;
  top: 105px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--white);
  box-shadow: var(--shadow);
  padding: 26px;
}

.purchase-panel .price {
  margin-bottom: 6px;
  font-size: 2.45rem;
}

.purchase-panel > p {
  color: var(--muted);
}

.purchase-panel .button {
  width: 100%;
  margin-top: 10px;
}

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 54px;
}

.detail-content > section,
.policy-content > section {
  padding: 32px 0;
  border-top: 1px solid var(--line);
}

.detail-content > section:first-child,
.policy-content > section:first-child {
  border-top: 0;
  padding-top: 0;
}

.detail-content h2,
.policy-content h2 {
  font-size: 1.65rem;
}

.detail-content p,
.detail-content li,
.policy-content p,
.policy-content li {
  color: var(--muted);
}

.detail-content li,
.policy-content li {
  margin-bottom: 9px;
}

.side-nav {
  position: sticky;
  top: 105px;
  align-self: start;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--soft);
  padding: 20px;
}

.side-nav strong {
  display: block;
  margin-bottom: 10px;
}

.side-nav a {
  display: block;
  color: #40536f;
  padding: 6px 0;
  font-size: 0.9rem;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 16px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  font-size: 0.92rem;
}

th,
td {
  min-width: 150px;
  border-bottom: 1px solid var(--line);
  padding: 15px 17px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f3f7fc;
  color: #334760;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

.yes {
  color: var(--success);
  font-weight: 850;
}

.pending {
  color: var(--danger);
  font-weight: 850;
}

.policy-shell {
  display: grid;
  grid-template-columns: minmax(0, 820px) 250px;
  gap: 54px;
  align-items: start;
}

.updated {
  color: #6c7d94;
  font-size: 0.9rem;
}

.definition-list {
  margin: 0;
}

.definition-list div {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 18px;
  border-top: 1px solid var(--line);
  padding: 16px 0;
}

.definition-list dt {
  color: #334760;
  font-weight: 850;
}

.definition-list dd {
  margin: 0;
  color: var(--muted);
}

.how-shell {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.how-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
}

.how-tab {
  border: 0;
  background: #f4f8ff;
  padding: 17px 14px;
  color: #51657f;
  font: inherit;
  font-weight: 850;
  cursor: pointer;
}

.how-tab:hover,
.how-tab:focus-visible,
.how-tab.active {
  background: var(--white);
  color: var(--primary);
}

.how-tab.active {
  box-shadow: inset 0 -3px 0 var(--primary);
}

.how-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 42px;
  align-items: center;
  min-height: 350px;
  padding: 42px;
}

.how-panel[hidden] {
  display: none;
}

.how-panel h3 {
  margin-bottom: 12px;
  font-size: clamp(1.55rem, 3vw, 2.2rem);
}

.demo-surface,
.demo-code {
  border: 1px solid #29446d;
  border-radius: 18px;
  background: #08162d;
  box-shadow: 0 22px 50px rgba(4, 17, 42, 0.22);
  padding: 26px;
  color: #e8f1ff;
}

.demo-status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  color: #a9c0df;
  font-weight: 800;
}

.demo-led {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: #40e0c1;
  box-shadow: 0 0 16px rgba(64, 224, 193, 0.8);
}

.demo-buttons {
  display: flex;
  gap: 10px;
  margin-bottom: 26px;
}

.demo-buttons span {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid #47638d;
  border-radius: 50%;
  background: #13284a;
  font-weight: 900;
}

.demo-buttons span:first-child {
  border-color: #46d7c0;
  background: #153f46;
}

.demo-meter {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 14px;
  align-items: center;
  margin-top: 16px;
  color: #b9cbe4;
  font-size: 0.85rem;
}

.demo-meter i {
  overflow: hidden;
  height: 9px;
  border-radius: 999px;
  background: #20385c;
}

.demo-meter b {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #7357ff, #35d8ea);
}

.meter-25 { width: 25%; }
.meter-40 { width: 40%; }
.meter-45 { width: 45%; }
.meter-65 { width: 65%; }

.demo-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid #263e61;
  padding: 16px 0;
}

.demo-row:last-child {
  border-bottom: 0;
}

.demo-row span {
  border-radius: 9px;
  background: #172d4f;
  padding: 7px 10px;
  color: #b9cbe4;
}

.demo-row .demo-switch {
  background: #1d6d68;
  color: #d9fff8;
}

.demo-code {
  margin: 0;
  white-space: pre-wrap;
  color: #91f2df;
  font: 700 0.92rem/1.8 ui-monospace, SFMono-Regular, Consolas, monospace;
}

.site-footer {
  background: #061226;
  color: #b9c9e4;
  padding: 58px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
  gap: 34px;
}

.site-footer .brand {
  color: var(--white);
}

.site-footer h2 {
  margin-bottom: 14px;
  color: #7f93b3;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.site-footer a {
  display: block;
  width: fit-content;
  margin: 8px 0;
  color: #d9e7ff;
}

.footer-copy {
  max-width: 320px;
  margin-top: 18px;
  color: #91a6c5;
  font-size: 0.88rem;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 44px;
  border-top: 1px solid #203759;
  padding-top: 24px;
  color: #8298b9;
  font-size: 0.82rem;
}

.footer-bottom p {
  margin: 0;
}

@media (max-width: 920px) {
  .hero-grid,
  .product-hero,
  .detail-layout,
  .policy-shell,
  .identity-card {
    grid-template-columns: 1fr;
  }

  .three-grid {
    grid-template-columns: 1fr;
  }

  .how-panel {
    grid-template-columns: 1fr;
  }

  .purchase-panel,
  .side-nav {
    position: static;
  }

  .side-nav {
    order: -1;
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 28px, var(--max));
  }

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

  .menu-button {
    display: inline-flex;
  }

  .nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    border-bottom: 1px solid var(--line);
    background: var(--white);
    box-shadow: var(--shadow);
    padding: 16px 20px 22px;
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    padding: 10px 4px;
  }

  .nav .nav-cta {
    text-align: center;
  }

  .hero {
    padding: 62px 0 54px;
  }

  .section {
    padding: 62px 0;
  }

  .product-grid,
  .two-grid,
  .policy-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .how-tabs {
    grid-template-columns: 1fr 1fr;
  }

  .how-panel {
    min-height: 0;
    padding: 26px;
  }

  .facts div,
  .definition-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .footer-bottom {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}