:root {
  color-scheme: light;
  --bg: #f6faff;
  --paper: #ffffff;
  --ink: #111827;
  --muted: #5c6d83;
  --line: #d9e4f0;
  --line-strong: #bfcfe0;
  --blue: #0b74d1;
  --blue-deep: #0754a6;
  --blue-soft: #e9f4ff;
  --cyan: #54c7ec;
  --green: #0c8a63;
  --green-soft: #e6f7f1;
  --orange: #e87817;
  --orange-soft: #fff2e5;
  --shadow: 0 28px 76px rgba(23, 42, 69, 0.1);
  --mono: "DIN Alternate", "Avenir Next Condensed", "SFMono-Regular", Menlo, monospace;
  --sans: "Avenir Next", "Hiragino Sans GB", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    linear-gradient(90deg, rgba(11, 116, 209, 0.045) 1px, transparent 1px) 0 0 / 48px 48px,
    linear-gradient(rgba(11, 116, 209, 0.035) 1px, transparent 1px) 0 0 / 48px 48px,
    radial-gradient(circle at 82% 7%, rgba(84, 199, 236, 0.2), transparent 28%),
    var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  background-image: radial-gradient(rgba(17, 24, 39, 0.075) 1px, transparent 1px);
  background-size: 18px 18px;
  mask-image: linear-gradient(180deg, black, transparent 72%);
}

body::after {
  position: fixed;
  top: 20%;
  right: -240px;
  z-index: -1;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(11, 116, 209, 0.08);
  border-radius: 50%;
  box-shadow: 0 0 0 72px rgba(11, 116, 209, 0.018), 0 0 0 144px rgba(11, 116, 209, 0.012);
  content: "";
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

button:not(:disabled) {
  cursor: pointer;
}

svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

::selection {
  background: var(--blue);
  color: #fff;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  min-height: 74px;
  padding: 12px clamp(18px, 5vw, 68px);
  border-bottom: 1px solid rgba(219, 229, 240, 0.86);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 195px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid rgba(11, 116, 209, 0.23);
  border-radius: 8px;
  background: linear-gradient(135deg, #fff, #e5f3ff);
  color: var(--blue-deep);
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 900;
  box-shadow: inset 0 -10px 20px rgba(11, 116, 209, 0.08);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 16px;
  line-height: 1.25;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.035em;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.main-nav a {
  min-width: 84px;
  padding: 9px 11px;
  border-radius: 7px;
  color: #3f5066;
  font-size: 14px;
  text-align: center;
  transition: 180ms ease;
}

.main-nav a:hover {
  background: var(--blue-soft);
  color: var(--blue-deep);
}

.header-action,
.primary-button,
.quiet-button,
.disabled-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  border-radius: 8px;
  font-weight: 800;
  text-align: center;
}

.header-action {
  min-width: 128px;
  padding: 10px 16px;
  border: 1px solid #0f5fb4;
  background: #0c61b7;
  color: #fff;
  box-shadow: 0 12px 30px rgba(11, 116, 209, 0.2);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.header-action:hover,
.primary-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 38px rgba(11, 116, 209, 0.25);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(370px, 0.78fr);
  gap: clamp(34px, 6vw, 84px);
  align-items: center;
  width: min(1160px, calc(100% - 36px));
  min-height: 610px;
  margin: 0 auto;
  padding: clamp(56px, 7vw, 96px) 0 54px;
}

.hero::before {
  position: absolute;
  top: 104px;
  left: -20px;
  width: 96px;
  height: 1px;
  background: var(--blue);
  content: "";
}

.hero::after {
  position: absolute;
  top: 70px;
  right: 5%;
  z-index: -1;
  color: rgba(11, 116, 209, 0.035);
  font-family: var(--mono);
  font-size: clamp(110px, 16vw, 230px);
  font-weight: 900;
  line-height: 1;
  content: "01";
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(45px, 5.4vw, 70px);
  font-weight: 850;
  letter-spacing: -0.045em;
  line-height: 1.04;
}

.hero h1 span {
  display: block;
  white-space: nowrap;
}

.hero h1 span:last-child {
  color: var(--blue-deep);
}

.hero-text {
  max-width: 680px;
  margin: 25px 0 0;
  color: #43536a;
  font-size: clamp(16px, 1.8vw, 19px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.primary-button,
.quiet-button {
  min-width: 150px;
  padding: 12px 18px;
  border: 1px solid transparent;
  transition: 180ms ease;
}

.primary-button {
  border-color: var(--blue-deep);
  background: var(--blue);
  color: #fff;
  box-shadow: 0 15px 32px rgba(11, 116, 209, 0.2);
}

.primary-button.full {
  width: 100%;
}

.quiet-button {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.78);
  color: #243247;
}

.quiet-button:hover {
  border-color: var(--line-strong);
  background: #fff;
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 20px;
  margin-top: 26px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
}

.hero-proof span::before {
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--green);
  content: "";
}

.launch-console {
  overflow: hidden;
  border: 1px solid rgba(11, 116, 209, 0.25);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow);
}

.console-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 52px;
  padding: 0 17px;
  border-bottom: 1px solid var(--line);
  background: #f8fbff;
}

.console-bar > span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #c4d2df;
}

.console-bar > span:nth-child(2) {
  background: #91d9f3;
}

.console-bar > span:nth-child(3) {
  background: #9bd6c2;
}

.console-bar code {
  margin-left: auto;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
}

.console-body {
  padding: clamp(24px, 4vw, 34px);
}

.console-body > p {
  margin: 0 0 24px;
  color: #26364b;
  font-family: var(--mono);
  font-size: 13px;
}

.prompt {
  margin-right: 9px;
  color: var(--blue);
  font-weight: 900;
}

.boot-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.boot-list li {
  display: grid;
  grid-template-columns: 32px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
}

.boot-list li > span {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 900;
}

.boot-list strong,
.boot-list small {
  display: block;
}

.boot-list strong {
  font-size: 14px;
}

.boot-list small {
  margin-top: 1px;
  color: var(--muted);
  font-size: 11px;
}

.boot-list b {
  padding: 4px 7px;
  border-radius: 4px;
  background: var(--blue-soft);
  color: var(--blue-deep);
  font-family: var(--mono);
  font-size: 9px;
}

.boot-list .is-done {
  border-color: rgba(12, 138, 99, 0.25);
  background: var(--green-soft);
}

.boot-list .is-done b {
  background: #fff;
  color: var(--green);
}

.console-status {
  margin-top: 20px;
  padding: 15px 16px;
  border-left: 3px solid var(--blue);
  background: var(--blue-soft);
}

.console-status span,
.console-status strong {
  display: block;
}

.console-status span {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.console-status strong {
  margin-top: 4px;
  font-size: 13px;
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: min(1160px, calc(100% - 36px));
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 18px 54px rgba(23, 42, 69, 0.06);
}

.signal-strip a {
  position: relative;
  min-height: 130px;
  padding: 24px 28px;
  transition: background 180ms ease;
}

.signal-strip a + a {
  border-left: 1px solid var(--line);
}

.signal-strip a:hover {
  background: var(--blue-soft);
}

.signal-strip span {
  display: block;
  margin-bottom: 7px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 900;
}

.signal-strip strong {
  font-size: 18px;
}

.signal-strip p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.section {
  width: min(1160px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(82px, 10vw, 126px) 0 0;
}

.section-heading {
  margin-bottom: 36px;
}

.section-heading.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.68fr);
  gap: 48px;
  align-items: end;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(34px, 4.3vw, 54px);
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.section-subnote {
  display: block;
  margin-top: 9px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.section-heading > p,
.section-heading.split > p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.install-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.62fr) minmax(0, 1.38fr);
  gap: 22px;
}

.download-card,
.install-steps,
.route-card,
.mode-stage,
.example-prompt,
.prompt-card,
.source-card {
  border: 1px solid var(--line);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 22px 64px rgba(23, 42, 69, 0.07);
}

.download-card {
  position: relative;
  overflow: hidden;
  padding: 30px;
}

.download-card::after {
  position: absolute;
  right: -34px;
  bottom: -62px;
  color: rgba(11, 116, 209, 0.045);
  font-family: var(--mono);
  font-size: 176px;
  font-weight: 900;
  line-height: 1;
  content: "↓";
}

.card-label {
  position: relative;
  z-index: 1;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.download-icon {
  display: grid;
  width: 60px;
  height: 60px;
  margin: 32px 0 24px;
  place-items: center;
  border: 1px solid rgba(11, 116, 209, 0.23);
  border-radius: 8px;
  background: var(--blue-soft);
  color: var(--blue);
}

.download-icon svg {
  width: 25px;
  height: 25px;
}

.download-card h3 {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 29px;
  line-height: 1.15;
}

.download-card p {
  position: relative;
  z-index: 1;
  margin: 12px 0 25px;
  color: var(--muted);
  font-size: 14px;
}

.download-card .primary-button {
  position: relative;
  z-index: 1;
}

.download-card > small {
  position: relative;
  z-index: 1;
  display: block;
  margin-top: 17px;
  color: #6b7b8f;
  font-size: 11px;
}

.install-steps {
  overflow: hidden;
}

.system-tabs {
  display: flex;
  gap: 4px;
  padding: 12px;
  border-bottom: 1px solid var(--line);
  background: #f8fbff;
}

.system-tab {
  min-width: 110px;
  padding: 9px 16px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 900;
}

.system-tab.is-active {
  border-color: var(--line);
  background: #fff;
  color: var(--blue-deep);
  box-shadow: 0 6px 15px rgba(23, 42, 69, 0.06);
}

.system-panel {
  padding: 14px 30px 24px;
}

.system-panel ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.system-panel li {
  position: relative;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 18px;
  padding: 20px 0;
}

.system-panel li + li {
  border-top: 1px dashed var(--line);
}

.system-panel li > span {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--blue-soft);
  color: var(--blue);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
}

.system-panel strong {
  font-size: 16px;
}

.system-panel p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.safety-note {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 24px;
  align-items: center;
  margin-top: 18px;
  padding: 19px 24px;
  border: 1px solid #f0cfae;
  border-radius: 8px;
  background: var(--orange-soft);
}

.safety-note span {
  color: #a4540f;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.06em;
}

.safety-note p {
  margin: 0;
  color: #71471f;
  font-size: 13px;
}

.route-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 22px;
}

.route-card {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 4vw, 42px);
}

.route-primary {
  border-color: rgba(11, 116, 209, 0.25);
}

.route-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.route-top > span {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.route-top b {
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green);
  font-size: 10px;
}

.route-card h3 {
  margin: 27px 0 0;
  font-size: clamp(27px, 3.2vw, 38px);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.route-card > p {
  max-width: 700px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.route-steps {
  display: grid;
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.route-steps li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  align-items: start;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fbfdff;
}

.route-steps span {
  display: grid;
  width: 25px;
  height: 25px;
  place-items: center;
  border-radius: 5px;
  background: var(--blue);
  color: #fff;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
}

.route-steps p {
  margin: 1px 0 0;
  color: #405067;
  font-size: 13px;
}

.route-steps a,
.text-link {
  color: var(--blue-deep);
  font-weight: 800;
}

.route-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  margin-top: 26px;
}

.route-actions .primary-button {
  min-width: 138px;
}

.text-link {
  font-size: 13px;
}

.route-options {
  display: flex;
  min-height: 100%;
  flex-direction: column;
  background:
    radial-gradient(circle at 100% 0, rgba(84, 199, 236, 0.13), transparent 32%),
    rgba(255, 255, 255, 0.9);
}

.route-options .route-top b {
  background: var(--blue-soft);
  color: var(--blue-deep);
}

.route-options-mark {
  position: absolute;
  top: 58px;
  right: 20px;
  color: rgba(11, 116, 209, 0.055);
  font-family: var(--mono);
  font-size: 130px;
  font-weight: 900;
  line-height: 1;
}

.route-option-list {
  display: grid;
  gap: 11px;
  margin-top: 30px;
}

.route-option {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 42px 1fr auto;
  gap: 14px;
  align-items: center;
  min-height: 112px;
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 12px 28px rgba(23, 42, 69, 0.055);
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.route-option:hover {
  border-color: rgba(11, 116, 209, 0.55);
  box-shadow: 0 18px 34px rgba(11, 116, 209, 0.13);
  transform: translateY(-2px);
}

.route-option-index {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid rgba(11, 116, 209, 0.2);
  border-radius: 7px;
  background: var(--blue-soft);
  color: var(--blue);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
}

.route-option-copy {
  display: block;
  min-width: 0;
}

.route-option-copy small,
.route-option-copy strong,
.route-option-copy .route-option-disclaimer,
.route-option-copy em {
  display: block;
}

.route-option-copy small {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.07em;
}

.route-option-copy strong {
  margin-top: 4px;
  font-size: 18px;
}

.route-option-copy .route-option-disclaimer {
  margin-top: 5px;
  color: #697b90;
  font-size: 10px;
  line-height: 1.55;
}

.route-option-copy em {
  margin-top: 6px;
  color: var(--muted);
  font-size: 11px;
  font-style: normal;
}

.route-option > svg {
  color: var(--blue);
  transition: transform 180ms ease;
}

.route-option:hover > svg {
  transform: translate(2px, -2px);
}

.account-tip {
  display: grid;
  grid-template-columns: minmax(280px, 0.65fr) 1fr;
  gap: 34px;
  margin-top: 18px;
  padding: 22px 26px;
  border: 1px solid rgba(11, 116, 209, 0.18);
  border-radius: 8px;
  background: var(--blue-soft);
}

.account-tip strong {
  color: var(--blue-deep);
  font-size: 15px;
}

.account-tip p {
  margin: 0;
  color: #4b6177;
  font-size: 13px;
}

.mode-switcher {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}

.mode-button {
  display: grid;
  grid-template-columns: 40px 1fr;
  column-gap: 13px;
  align-items: center;
  min-height: 80px;
  padding: 15px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--ink);
  text-align: left;
  transition: 180ms ease;
}

.mode-button > span {
  grid-row: 1 / 3;
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
}

.mode-button strong {
  align-self: end;
  font-size: 17px;
  line-height: 1.1;
}

.mode-button small {
  align-self: start;
  color: var(--muted);
  font-size: 11px;
}

.mode-button.is-active {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
  box-shadow: 0 15px 36px rgba(11, 116, 209, 0.2);
}

.mode-button.is-active > span {
  border-color: rgba(255, 255, 255, 0.28);
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.mode-button.is-active small {
  color: rgba(255, 255, 255, 0.75);
}

.mode-stage {
  overflow: hidden;
}

.mode-panel {
  display: grid;
  grid-template-columns: minmax(280px, 0.67fr) minmax(0, 1.33fr);
  min-height: 390px;
}

.mode-intro {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 4vw, 46px);
  border-right: 1px solid var(--line);
  background: #0d5fae;
  color: #fff;
}

.mode-intro::after {
  position: absolute;
  right: -48px;
  bottom: -84px;
  width: 230px;
  height: 230px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 50%;
  box-shadow: 0 0 0 38px rgba(255, 255, 255, 0.035), 0 0 0 76px rgba(255, 255, 255, 0.025);
  content: "";
}

.mode-intro > span {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.09em;
  opacity: 0.72;
}

.mode-intro h3 {
  position: relative;
  z-index: 1;
  margin: 72px 0 0;
  font-size: clamp(28px, 3.3vw, 40px);
  letter-spacing: -0.035em;
  line-height: 1.18;
}

.mode-intro p {
  position: relative;
  z-index: 1;
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.capability-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 16px;
}

.capability-grid > div {
  padding: 28px;
}

.capability-grid > div:nth-child(odd) {
  border-right: 1px dashed var(--line);
}

.capability-grid > div:nth-child(-n + 2) {
  border-bottom: 1px dashed var(--line);
}

.capability-grid span {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
}

.capability-grid strong {
  display: block;
  margin-top: 12px;
  font-size: 18px;
}

.capability-grid p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.formula {
  display: grid;
  grid-template-columns: repeat(7, auto);
  align-items: stretch;
  justify-content: stretch;
}

.formula > div {
  display: grid;
  min-width: 0;
  flex: 1;
  padding: 25px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  text-align: center;
}

.formula > div span {
  display: grid;
  width: 35px;
  height: 35px;
  margin: 0 auto 14px;
  place-items: center;
  border-radius: 50%;
  background: var(--blue-soft);
  color: var(--blue);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 900;
}

.formula > div strong {
  font-size: 15px;
}

.formula > div p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.formula > b {
  display: grid;
  min-width: 34px;
  place-items: center;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 20px;
}

.example-prompt {
  overflow: hidden;
  margin-top: 18px;
}

.prompt-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 53px;
  padding: 10px 17px;
  border-bottom: 1px solid var(--line);
  background: #f7faff;
}

.prompt-header > span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
}

.copy-button,
.card-copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--blue-deep);
  font-size: 11px;
  font-weight: 800;
}

.copy-button {
  padding: 7px 10px;
}

.copy-button svg {
  width: 14px;
  height: 14px;
}

.example-prompt pre {
  margin: 0;
  overflow-x: auto;
  padding: clamp(24px, 4vw, 34px);
  background: #0f2338;
  color: #d7e8f9;
  font-family: var(--mono);
  font-size: clamp(12px, 1.5vw, 14px);
  line-height: 1.9;
  white-space: pre-wrap;
}

.prompt-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.filter-button {
  min-width: 76px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.8);
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.filter-button.is-active {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
}

.prompt-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.prompt-card {
  display: flex;
  min-height: 315px;
  flex-direction: column;
  padding: 25px;
  transition: transform 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}

.prompt-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 72px rgba(23, 42, 69, 0.12);
}

.prompt-card.is-hidden {
  display: none;
}

.prompt-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
}

.prompt-meta span {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
}

.prompt-meta b {
  padding: 4px 7px;
  border-radius: 4px;
  background: var(--blue-soft);
  color: var(--blue-deep);
  font-size: 9px;
}

.prompt-card h3 {
  margin: 26px 0 0;
  font-size: 20px;
  line-height: 1.25;
}

.prompt-card p {
  margin: 13px 0 24px;
  color: var(--muted);
  font-size: 13px;
}

.card-copy {
  width: 100%;
  min-height: 40px;
  margin-top: auto;
  transition: 180ms ease;
}

.card-copy:hover,
.copy-button:hover {
  border-color: var(--blue);
  background: var(--blue-soft);
}

.workflow-track {
  display: grid;
  grid-template-columns: 1fr 34px 1fr 34px 1fr 34px 1fr 34px 1fr;
  align-items: center;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #0e2740;
  color: #fff;
  box-shadow: var(--shadow);
}

.workflow-track div {
  min-height: 126px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.035);
}

.workflow-track span {
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
}

.workflow-track strong {
  display: block;
  margin-top: 14px;
  font-size: 15px;
}

.workflow-track p {
  margin: 5px 0 0;
  color: rgba(255, 255, 255, 0.63);
  font-size: 11px;
}

.workflow-track i {
  position: relative;
  height: 1px;
  background: rgba(84, 199, 236, 0.55);
}

.workflow-track i::after {
  position: absolute;
  top: -3px;
  right: 0;
  width: 7px;
  height: 7px;
  border-top: 1px solid var(--cyan);
  border-right: 1px solid var(--cyan);
  transform: rotate(45deg);
  content: "";
}

.faq-list {
  border-top: 1px solid var(--line-strong);
}

.faq-list details {
  border-bottom: 1px solid var(--line-strong);
}

.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 23px 4px;
  font-size: 17px;
  font-weight: 800;
  list-style: none;
  cursor: pointer;
}

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

.faq-list summary span {
  display: grid;
  width: 29px;
  height: 29px;
  flex: 0 0 auto;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 400;
  transition: transform 180ms ease;
}

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

.faq-list details p {
  max-width: 850px;
  margin: -6px 0 24px;
  padding-right: 50px;
  color: var(--muted);
  font-size: 14px;
}

.source-section {
  padding-bottom: clamp(82px, 10vw, 120px);
}

.source-card {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr);
  overflow: hidden;
}

.source-card > div:first-child {
  padding: clamp(30px, 5vw, 52px);
  background: var(--blue);
  color: #fff;
}

.source-card > div:first-child .eyebrow {
  color: #bde9fa;
}

.source-card h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 45px);
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.source-card > div:first-child p:last-child {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: 13px;
}

.source-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 18px;
}

.source-links a {
  display: grid;
  grid-template-columns: 30px 1fr auto;
  gap: 12px;
  align-items: center;
  min-height: 104px;
  padding: 20px;
  border: 1px solid transparent;
  border-radius: 7px;
  transition: 180ms ease;
}

.source-links a:hover {
  border-color: var(--line);
  background: var(--blue-soft);
}

.source-links span {
  color: var(--blue);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
}

.source-links strong {
  font-size: 14px;
}

.source-links b {
  color: var(--blue);
}

.site-footer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 30px;
  align-items: center;
  min-height: 118px;
  padding: 24px clamp(18px, 5vw, 68px);
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.76);
}

.footer-brand {
  min-width: 210px;
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

.site-footer > a:last-child,
.site-footer .back-top {
  color: var(--blue-deep);
  font-size: 12px;
  font-weight: 800;
}

.site-footer .back-top {
  padding: 0;
  border: 0;
  background: transparent;
}

.site-footer .back-top:hover {
  color: var(--blue);
}

.toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 100;
  max-width: min(360px, calc(100% - 44px));
  padding: 13px 17px;
  border: 1px solid rgba(11, 116, 209, 0.24);
  border-radius: 8px;
  background: #0f2338;
  color: #fff;
  font-size: 12px;
  box-shadow: 0 20px 50px rgba(15, 35, 56, 0.26);
  opacity: 0;
  transform: translateY(14px);
  transition: 180ms ease;
  pointer-events: none;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 620ms ease, transform 620ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal.delay-1 {
  transition-delay: 100ms;
}

@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 1020px) {
  .main-nav a {
    min-width: auto;
    padding: 9px 8px;
  }

  .hero {
    grid-template-columns: 1fr 360px;
    gap: 34px;
  }

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

  .workflow-track {
    grid-template-columns: 1fr 22px 1fr 22px 1fr;
    row-gap: 18px;
  }

  .workflow-track div:nth-of-type(4),
  .workflow-track div:nth-of-type(5) {
    grid-row: 2;
  }

  .workflow-track div:nth-of-type(4) {
    grid-column: 3;
  }

  .workflow-track div:nth-of-type(5) {
    grid-column: 1;
  }

  .workflow-track i:nth-of-type(3),
  .workflow-track i:nth-of-type(4) {
    display: none;
  }
}

@media (max-width: 860px) {
  .site-header {
    flex-wrap: wrap;
    min-height: auto;
  }

  .brand {
    min-width: 0;
  }

  .main-nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    justify-content: flex-start;
    padding-top: 2px;
  }

  .main-nav a {
    flex: 0 0 auto;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .launch-console {
    width: min(620px, 100%);
  }

  .section-heading.split,
  .install-layout,
  .route-grid,
  .mode-panel,
  .source-card,
  .account-tip {
    grid-template-columns: 1fr;
  }

  .section-heading.split {
    gap: 18px;
  }

  .mode-intro {
    min-height: 290px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .mode-intro h3 {
    margin-top: 58px;
  }

  .formula {
    grid-template-columns: 1fr 32px 1fr;
    row-gap: 12px;
  }

  .formula > div:nth-of-type(3) {
    grid-column: 1;
    grid-row: 3;
  }

  .formula > b:nth-of-type(2) {
    display: none;
  }

  .formula > b:nth-of-type(3) {
    grid-column: 2;
    grid-row: 3;
  }

  .source-links {
    min-height: 250px;
  }
}

@media (max-width: 680px) {
  .site-header {
    padding: 10px 16px;
  }

  .brand strong {
    font-size: 14px;
  }

  .brand small {
    display: none;
  }

  .header-action {
    min-width: 0;
    padding: 9px 12px;
    font-size: 12px;
  }

  .hero,
  .section,
  .signal-strip {
    width: min(100% - 28px, 1160px);
  }

  .hero {
    padding-top: 50px;
  }

  .hero h1 {
    font-size: clamp(40px, 12.2vw, 62px);
  }

  .hero h1 span {
    white-space: normal;
  }

  .signal-strip {
    grid-template-columns: 1fr;
  }

  .signal-strip a {
    min-height: auto;
    padding: 19px 22px;
  }

  .signal-strip a + a {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .section {
    padding-top: 78px;
  }

  .section-heading h2 {
    font-size: 36px;
  }

  .safety-note {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .pending-fields,
  .mode-switcher,
  .capability-grid,
  .prompt-grid,
  .source-links {
    grid-template-columns: 1fr;
  }

  .mode-button {
    min-height: 66px;
  }

  .capability-grid > div:nth-child(n) {
    border-right: 0;
    border-bottom: 1px dashed var(--line);
  }

  .capability-grid > div:last-child {
    border-bottom: 0;
  }

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

  .formula > div:nth-of-type(n),
  .formula > b:nth-of-type(n) {
    grid-column: auto;
    grid-row: auto;
  }

  .formula > b:nth-of-type(n) {
    display: grid;
    min-height: 25px;
  }

  .prompt-card {
    min-height: 280px;
  }

  .workflow-track {
    grid-template-columns: 1fr;
  }

  .workflow-track div:nth-of-type(n) {
    grid-column: auto;
    grid-row: auto;
  }

  .workflow-track i:nth-of-type(n) {
    display: block;
    width: 1px;
    height: 22px;
    margin: 0 auto;
  }

  .workflow-track i::after {
    top: auto;
    right: -3px;
    bottom: 0;
    transform: rotate(135deg);
  }

  .source-links a {
    min-height: 74px;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 18px;
    text-align: center;
  }

  .footer-brand {
    min-width: 0;
    justify-content: center;
  }

  .faq-list summary {
    font-size: 15px;
  }

  .faq-list details p {
    padding-right: 0;
  }
}

.community-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 360px);
  overflow: hidden;
  border: 1px solid rgba(11, 116, 209, 0.25);
  border-radius: 10px;
  background: #0e2740;
  color: #fff;
  box-shadow: var(--shadow);
}

.community-copy {
  padding: clamp(30px, 5vw, 56px);
}

.community-kicker {
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.community-copy h3 {
  max-width: 620px;
  margin: 18px 0 0;
  font-size: clamp(30px, 4vw, 48px);
  letter-spacing: -0.04em;
  line-height: 1.08;
}

.community-copy > p {
  max-width: 650px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 15px;
}

.community-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 34px;
}

.community-points > div {
  min-height: 118px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.045);
}

.community-points span {
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 900;
}

.community-points strong {
  display: block;
  margin-top: 13px;
  font-size: 14px;
}

.community-points p {
  margin: 4px 0 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 11px;
  line-height: 1.5;
}

.community-note {
  margin-top: 24px;
  padding: 11px 14px;
  border-left: 2px solid var(--cyan);
  color: rgba(255, 255, 255, 0.58);
  font-size: 11px;
}

.qr-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100%;
  margin: 0;
  padding: clamp(28px, 4vw, 42px);
  background:
    linear-gradient(135deg, rgba(12, 138, 99, 0.1), transparent 60%),
    #f1faf6;
  color: var(--ink);
}

.qr-frame {
  width: min(100%, 294px);
  padding: 12px;
  border: 1px solid rgba(12, 138, 99, 0.2);
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 20px 44px rgba(8, 45, 50, 0.16);
}

.qr-frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
}

.qr-card figcaption {
  margin-top: 16px;
  color: #2f6658;
  font-size: 12px;
  line-height: 1.7;
  text-align: center;
}

@media (max-width: 860px) {
  .community-card {
    grid-template-columns: 1fr;
  }

  .qr-card {
    border-top: 1px solid rgba(12, 138, 99, 0.2);
  }
}

@media (max-width: 680px) {
  .community-points {
    grid-template-columns: 1fr;
  }

  .community-points > div {
    min-height: auto;
  }

  .qr-frame {
    width: min(100%, 270px);
  }
}