@font-face {
  font-family: "Inter";
  src: url("./fonts/InterVariable.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

@font-face {
  font-family: "Space Grotesk";
  src: url("./fonts/SpaceGrotesk-Variable.woff2") format("woff2");
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
}

@font-face {
  font-family: "Source Han Sans CN";
  src: url("./fonts/SourceHanSansCN-Regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Source Han Sans CN";
  src: url("./fonts/SourceHanSansCN-Medium.woff2") format("woff2");
  font-style: normal;
  font-weight: 500 600;
  font-display: swap;
}

@font-face {
  font-family: "Source Han Sans CN";
  src: url("./fonts/SourceHanSansCN-Bold.woff2") format("woff2");
  font-style: normal;
  font-weight: 700 900;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --bg: #090b0f;
  --bg-soft: #0e1117;
  --surface: rgba(255, 255, 255, 0.055);
  --surface-strong: rgba(255, 255, 255, 0.085);
  --line: rgba(255, 255, 255, 0.11);
  --line-soft: rgba(255, 255, 255, 0.07);
  --text: #f4f6f9;
  --muted: #9da6b4;
  --muted-strong: #bdc4cf;
  --blue: #367ef5;
  --blue-soft: #6ca2ff;
  --green: #42d17e;
  --amber: #d8a857;
  --content: 1180px;
  --radius-xl: 36px;
  --radius-lg: 26px;
  --radius-md: 18px;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.36);
  --font-copy: "Inter", "Source Han Sans CN", "PingFang SC", sans-serif;
  --font-number: "Space Grotesk", "Inter", sans-serif;
  font-family: var(--font-copy);
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 15% -10%, rgba(53, 95, 164, 0.16), transparent 30%),
    linear-gradient(180deg, #0a0c11 0%, #080a0e 100%);
  -webkit-font-smoothing: antialiased;
  font-optical-sizing: auto;
  text-rendering: optimizeLegibility;
}

.temperature-number,
.environment-strip b,
.app-card-visual strong,
.about-principle > span,
.phone-status,
.battery-badge,
.phone-temperature strong,
.phone-metrics b,
.mini-temp strong,
.step-number,
.shortcut-time strong,
.state-temperature,
.font-number {
  font-family: var(--font-number);
  font-variant-numeric: tabular-nums lining-nums;
}

.temperature-number,
.phone-temperature strong,
.state-temperature {
  letter-spacing: -0.045em;
}

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

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

.site-header {
  position: relative;
  z-index: 20;
  width: min(calc(100% - 48px), var(--content));
  height: 92px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line-soft);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.04));
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.14);
  font-size: 17px;
  font-weight: 760;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.brand-copy strong {
  font-size: 15px;
  letter-spacing: 0.01em;
}

.brand-copy small {
  color: var(--muted);
  font-size: 11px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  color: var(--muted-strong);
  font-size: 14px;
}

.site-nav > a {
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.site-nav > a:hover {
  color: var(--text);
}

.site-nav .nav-login {
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.035);
}

.site-nav .nav-login:hover {
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.07);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--blue-soft);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.home-hero {
  position: relative;
  width: min(calc(100% - 48px), var(--content));
  min-height: 700px;
  margin: 0 auto;
  padding: 90px 0 84px;
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  align-items: center;
  gap: 74px;
  overflow: hidden;
}

.home-hero-copy,
.hero-object {
  position: relative;
  z-index: 2;
}

.home-hero h1,
.fst-hero h1 {
  margin: 0;
  font-size: clamp(50px, 6.3vw, 88px);
  line-height: 1.04;
  letter-spacing: -0.055em;
  font-weight: 720;
}

.hero-lead,
.fst-hero-copy > p {
  max-width: 570px;
  margin: 30px 0 34px;
  color: var(--muted-strong);
  font-size: 18px;
  line-height: 1.85;
}

.primary-button,
.secondary-button {
  min-height: 50px;
  padding: 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 13px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 650;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.primary-button {
  color: white;
  background: var(--blue);
  box-shadow: 0 12px 36px rgba(54, 126, 245, 0.25);
}

.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-2px);
}

.primary-button:hover {
  background: #4a8bfa;
}

.secondary-button {
  color: var(--text);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  pointer-events: none;
}

.hero-glow-one {
  width: 480px;
  height: 480px;
  right: 1%;
  top: 15%;
  background: radial-gradient(circle, rgba(56, 127, 246, 0.14), transparent 67%);
}

.hero-glow-two {
  width: 240px;
  height: 240px;
  left: 37%;
  bottom: 2%;
  background: radial-gradient(circle, rgba(139, 164, 201, 0.08), transparent 70%);
}

.hero-object {
  min-height: 520px;
  display: grid;
  place-items: center;
  perspective: 1100px;
}

.hero-device {
  width: min(100%, 500px);
  min-height: 492px;
  padding: 30px 32px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 46px;
  background:
    radial-gradient(circle at 70% 25%, rgba(55, 126, 246, 0.19), transparent 37%),
    linear-gradient(145deg, rgba(25, 30, 40, 0.96), rgba(12, 15, 21, 0.98));
  box-shadow: var(--shadow), inset 0 1px rgba(255, 255, 255, 0.12);
  transform: rotateY(-7deg) rotateX(2deg);
}

.device-topline,
.phone-appbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.mini-wordmark,
.phone-appbar strong {
  font-size: 21px;
  font-weight: 800;
  font-style: italic;
  letter-spacing: -0.04em;
}

.connection-pill {
  color: var(--muted);
  font-size: 11px;
}

.connection-pill i,
.status-line i,
.active-label i {
  width: 7px;
  height: 7px;
  margin-right: 5px;
  display: inline-block;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 12px rgba(66, 209, 126, 0.62);
}

.temperature-stage {
  min-height: 334px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.temperature-label {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 14px;
}

.temperature-number {
  font-size: clamp(82px, 10vw, 132px);
  line-height: 1;
  letter-spacing: -0.07em;
  font-weight: 650;
  text-shadow: 0 0 38px rgba(54, 126, 245, 0.16);
}

.temperature-number sup {
  position: relative;
  top: -0.43em;
  margin-left: 5px;
  font-size: 0.34em;
  letter-spacing: 0;
}

.temperature-state {
  margin-top: 20px;
  padding: 8px 13px;
  border: 1px solid rgba(75, 140, 250, 0.25);
  border-radius: 999px;
  color: #a9c8ff;
  background: rgba(54, 126, 245, 0.08);
  font-size: 12px;
}

.environment-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-soft);
}

.environment-row > span {
  padding-top: 20px;
  display: grid;
  grid-template-columns: 24px 1fr;
  grid-template-rows: auto auto;
}

.environment-row > span + span {
  padding-left: 18px;
  border-left: 1px solid var(--line-soft);
}

.environment-row i {
  grid-row: 1 / 3;
  align-self: center;
  color: var(--blue-soft);
  font-style: normal;
}

.environment-row small {
  color: var(--muted);
  font-size: 10px;
}

.environment-row b {
  margin-top: 2px;
  font-size: 15px;
}

.product-section,
.principle-section,
.experience-section,
.shortcut-section,
.confidence-section,
.closing-section {
  width: min(calc(100% - 48px), var(--content));
  margin: 0 auto;
}

.product-section {
  padding: 110px 0 120px;
  border-top: 1px solid var(--line-soft);
}

.section-heading {
  margin-bottom: 46px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 64px;
}

.section-heading h2,
.principle-copy h2,
.shortcut-copy h2,
.confidence-section h2,
.closing-section h2 {
  margin: 0;
  font-size: clamp(36px, 4.3vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.045em;
}

.section-heading > p {
  max-width: 420px;
  margin: 0 0 5px;
  color: var(--muted);
  line-height: 1.8;
  font-size: 14px;
}

.product-grid {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr;
  gap: 18px;
}

.product-card {
  position: relative;
  min-height: 440px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.product-card-featured {
  padding: 52px;
  display: grid;
  grid-template-columns: 1fr 0.86fr;
  gap: 28px;
  align-items: center;
  background:
    radial-gradient(circle at 80% 36%, rgba(54, 126, 245, 0.15), transparent 34%),
    linear-gradient(145deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.025));
}

.app-identity {
  display: flex;
  align-items: center;
  gap: 16px;
}

.app-identity.large {
  margin-bottom: 38px;
}

.app-icon {
  flex: 0 0 auto;
  width: 60px;
  height: 60px;
  display: grid;
  place-items: center;
  border-radius: 17px;
  font-size: 15px;
  font-style: italic;
  font-weight: 850;
  letter-spacing: -0.05em;
}

.fst-icon {
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background:
    linear-gradient(145deg, rgba(74, 139, 250, 0.8), rgba(18, 51, 104, 0.78) 48%, rgba(14, 17, 23, 0.95));
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.24), 0 14px 28px rgba(0, 0, 0, 0.22);
}

.status-line {
  margin: 0 0 5px;
  color: var(--muted);
  font-size: 11px;
}

.app-identity h3 {
  margin: 0;
  font-size: 22px;
}

.product-slogan {
  max-width: 430px;
  margin: 38px 0 14px;
  font-size: clamp(29px, 3vw, 42px);
  line-height: 1.16;
  letter-spacing: -0.04em;
  font-weight: 670;
}

.product-description {
  max-width: 460px;
  margin: 0 0 30px;
  color: var(--muted-strong);
  font-size: 15px;
  line-height: 1.8;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #8eb6ff;
  font-size: 14px;
  font-weight: 650;
}

.text-link span {
  transition: transform 160ms ease;
}

.text-link:hover span {
  transform: translateX(4px);
}

.product-visual {
  position: relative;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}

.comfort-orbit {
  position: absolute;
  border: 1px solid rgba(105, 159, 255, 0.23);
  border-radius: 50%;
}

.orbit-one {
  width: 94%;
  height: 94%;
}

.orbit-two {
  width: 72%;
  height: 72%;
  border-color: rgba(255, 255, 255, 0.09);
}

.comfort-core {
  position: relative;
  z-index: 2;
  width: 62%;
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 50%;
  background: radial-gradient(circle at 50% 35%, rgba(68, 131, 242, 0.18), rgba(15, 19, 27, 0.94) 70%);
  box-shadow: 0 0 70px rgba(54, 126, 245, 0.13);
}

.comfort-core small,
.comfort-core span {
  color: var(--muted);
  font-size: 10px;
}

.comfort-core strong {
  margin: 5px 0 7px;
  font-size: clamp(38px, 4vw, 56px);
  letter-spacing: -0.06em;
}

.product-card-future {
  padding: 48px;
  display: flex;
  flex-direction: column;
  justify-content: end;
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.018));
}

.future-symbol {
  position: absolute;
  inset: 50px 48px auto;
  display: flex;
  gap: 10px;
}

.future-symbol span {
  width: 12px;
  height: 12px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 50%;
}

.future-symbol span:nth-child(2) {
  background: rgba(255, 255, 255, 0.12);
}

.product-card-future h3 {
  margin: 0 0 15px;
  font-size: 25px;
  letter-spacing: -0.03em;
}

.product-card-future > p:last-child {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
  font-size: 14px;
}

.principle-section {
  padding: 120px 0;
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  gap: 100px;
  border-top: 1px solid var(--line-soft);
}

.principle-list article {
  padding: 25px 0;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  border-top: 1px solid var(--line);
}

.principle-list article:last-child {
  border-bottom: 1px solid var(--line);
}

.principle-list article > span {
  padding-top: 4px;
  color: var(--blue-soft);
  font-size: 11px;
}

.principle-list h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.principle-list p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  font-size: 14px;
}

.site-footer {
  width: min(calc(100% - 48px), var(--content));
  margin: 0 auto;
  padding: 54px 0 calc(38px + env(safe-area-inset-bottom));
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 36px 70px;
  border-top: 1px solid var(--line-soft);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-brand strong {
  font-size: 16px;
}

.footer-brand span,
.footer-meta {
  color: #727b88;
  font-size: 11px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 24px;
  color: var(--muted);
  font-size: 12px;
}

.footer-links a:hover,
.beian-link:hover {
  color: var(--text);
}

.footer-meta {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.beian-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  white-space: nowrap;
}

.beian-link img {
  width: 15px;
  height: 15px;
  object-fit: contain;
}

/* FST product page */
.fst-hero {
  width: min(calc(100% - 48px), var(--content));
  min-height: 800px;
  margin: 0 auto;
  padding: 88px 0 110px;
  display: grid;
  grid-template-columns: 0.88fr 1.12fr;
  align-items: center;
  gap: 80px;
}

.app-category {
  margin: 4px 0 0;
  color: var(--muted-strong);
  font-size: 13px;
}

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

.fst-app-preview {
  position: relative;
  min-height: 650px;
  display: grid;
  place-items: center;
}

.preview-aura {
  position: absolute;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(54, 126, 245, 0.17), rgba(54, 126, 245, 0.02) 44%, transparent 68%);
}

.phone-frame {
  position: relative;
  z-index: 2;
  width: 322px;
  min-height: 640px;
  padding: 18px 21px 24px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 54px;
  background:
    radial-gradient(circle at 50% 35%, rgba(51, 104, 195, 0.18), transparent 35%),
    linear-gradient(160deg, #10151e, #07090d 78%);
  box-shadow: 0 36px 100px rgba(0, 0, 0, 0.52), inset 0 1px rgba(255, 255, 255, 0.18);
}

.phone-status {
  padding: 1px 8px 20px;
  display: flex;
  justify-content: space-between;
  color: #d9dee7;
  font-size: 9px;
  font-weight: 700;
}

.battery-badge {
  color: var(--muted);
  font-size: 10px;
}

.phone-climate {
  min-height: 350px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.phone-climate > small {
  color: var(--muted);
  font-size: 12px;
}

.phone-climate > strong {
  margin: 13px 0 18px;
  color: #70a3ff;
  font-size: 78px;
  line-height: 1;
  letter-spacing: -0.075em;
}

.phone-climate sup {
  position: relative;
  top: -0.5em;
  font-size: 0.35em;
}

.active-label {
  color: #9ebdf3;
  font-size: 10px;
}

.phone-weather {
  padding: 18px 2px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.phone-weather span {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
}

.phone-weather span + span {
  border-left: 1px solid var(--line-soft);
}

.phone-weather small {
  color: var(--muted);
  font-size: 9px;
}

.phone-weather b {
  font-size: 14px;
}

.phone-note {
  margin-top: 19px;
  padding: 14px 15px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line-soft);
  border-radius: 17px;
  background: rgba(255, 255, 255, 0.035);
}

.phone-note > i {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #99baff;
  background: rgba(54, 126, 245, 0.12);
  font-style: normal;
  font-size: 12px;
}

.phone-note > span {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.phone-note strong {
  font-size: 10px;
}

.phone-note small {
  color: var(--muted);
  font-size: 8px;
}

.experience-section {
  padding: 120px 0;
  border-top: 1px solid var(--line-soft);
}

.section-heading.centered {
  max-width: 720px;
  margin: 0 auto 56px;
  display: block;
  text-align: center;
}

.section-heading.centered > p:last-child {
  max-width: 580px;
  margin: 20px auto 0;
}

.experience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.experience-card {
  min-height: 500px;
  padding: 18px 18px 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.018));
}

.experience-visual {
  position: relative;
  height: 275px;
  margin-bottom: 29px;
  border: 1px solid var(--line-soft);
  border-radius: 18px;
  overflow: hidden;
  background: #0c0f14;
}

.step-number {
  color: var(--blue-soft);
  font-size: 10px;
}

.experience-card h3 {
  margin: 10px 0 11px;
  font-size: 21px;
  letter-spacing: -0.025em;
}

.experience-card > p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}

.ready-visual {
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 50% 46%, rgba(54, 126, 245, 0.17), transparent 40%),
    #0c0f14;
}

.ready-visual strong {
  position: relative;
  z-index: 3;
  font-size: 45px;
  font-weight: 600;
  letter-spacing: -0.06em;
}

.car-line {
  position: absolute;
  width: 190px;
  height: 82px;
  bottom: 40px;
  border: 2px solid rgba(255, 255, 255, 0.18);
  border-top: 0;
  border-radius: 18px 18px 30px 30px;
}

.car-line::before {
  content: "";
  position: absolute;
  width: 110px;
  height: 55px;
  left: 38px;
  top: -38px;
  border: 2px solid rgba(255, 255, 255, 0.18);
  border-bottom: 0;
  border-radius: 50% 50% 0 0;
}

.air-wave {
  position: absolute;
  width: 38px;
  height: 76px;
  top: 40px;
  border: 1px solid rgba(102, 157, 255, 0.45);
  border-left: 0;
  border-bottom: 0;
  border-radius: 50%;
}

.wave-one {
  left: 72px;
  transform: rotate(-32deg);
}

.wave-two {
  right: 72px;
  transform: scaleX(-1) rotate(-32deg);
}

.comfort-visual {
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 12% 15%, rgba(72, 136, 249, 0.13), transparent 33%),
    radial-gradient(circle at 88% 85%, rgba(217, 166, 82, 0.11), transparent 34%),
    #0c0f14;
}

.comfort-visual > div {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.comfort-visual small {
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 10px;
}

.comfort-visual strong {
  font-size: 51px;
  letter-spacing: -0.065em;
}

.weather-dot {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.weather-dot.cool {
  top: 45px;
  left: 44px;
  background: #5f98fb;
  box-shadow: 0 0 26px 11px rgba(54, 126, 245, 0.2);
}

.weather-dot.warm {
  right: 43px;
  bottom: 45px;
  background: var(--amber);
  box-shadow: 0 0 26px 11px rgba(216, 168, 87, 0.15);
}

.learn-visual {
  display: grid;
  place-items: center;
}

.learn-visual strong {
  position: relative;
  z-index: 3;
  font-size: 22px;
}

.learn-point {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--blue-soft);
  box-shadow: 0 0 18px rgba(108, 162, 255, 0.56);
}

.learn-point.p1 {
  left: 19%;
  bottom: 29%;
}

.learn-point.p2 {
  left: 46%;
  bottom: 47%;
}

.learn-point.p3 {
  right: 18%;
  top: 27%;
}

.learn-path {
  position: absolute;
  width: 72%;
  height: 42%;
  top: 31%;
  left: 14%;
  border-top: 1px solid rgba(108, 162, 255, 0.38);
  border-radius: 50%;
  transform: rotate(-12deg);
}

.shortcut-section {
  padding: 130px 0;
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  align-items: center;
  gap: 110px;
  border-top: 1px solid var(--line-soft);
}

.shortcut-visual {
  position: relative;
  min-height: 400px;
  display: grid;
  place-items: center;
}

.shortcut-visual::before {
  content: "";
  position: absolute;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(53, 123, 242, 0.14), transparent 68%);
}

.shortcut-tile,
.countdown-card {
  position: absolute;
  border: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(30, 36, 47, 0.96), rgba(13, 16, 22, 0.97));
  box-shadow: var(--shadow);
}

.shortcut-tile {
  z-index: 2;
  width: 330px;
  padding: 22px;
  display: flex;
  align-items: center;
  gap: 15px;
  border-radius: 25px;
  transform: translate(-35px, -40px);
}

.shortcut-symbol {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 15px;
  color: white;
  background: linear-gradient(145deg, #4b8cf9, #2158bb);
  font-size: 25px;
}

.shortcut-tile > div {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.shortcut-tile small,
.countdown-card span,
.countdown-card small {
  color: var(--muted);
  font-size: 10px;
}

.shortcut-tile strong {
  font-size: 17px;
}

.shortcut-play {
  color: #8bb4fb;
  font-size: 13px;
}

.countdown-card {
  z-index: 3;
  width: 235px;
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  border-radius: 21px;
  transform: translate(75px, 87px);
}

.countdown-card strong {
  margin: 8px 0 4px;
  font-size: 36px;
  letter-spacing: -0.04em;
}

.shortcut-copy > p:last-child {
  max-width: 520px;
  margin: 27px 0 0;
  color: var(--muted-strong);
  font-size: 16px;
  line-height: 1.85;
}

.confidence-section {
  padding: 120px 0;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 110px;
  border-top: 1px solid var(--line-soft);
}

.state-list {
  display: flex;
  flex-direction: column;
}

.state-list article {
  min-height: 114px;
  display: grid;
  grid-template-columns: 170px 1fr;
  align-items: center;
  border-top: 1px solid var(--line);
}

.state-list article:last-child {
  border-bottom: 1px solid var(--line);
}

.state-temperature {
  font-size: 35px;
  font-weight: 630;
  letter-spacing: -0.05em;
}

.state-temperature.blue {
  color: #5e98ff;
}

.state-temperature.idle {
  color: #777e88;
  text-shadow: 0 0 0 #777e88, 0 0 10px rgba(54, 126, 245, 0.2);
}

.state-list article > div {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.state-list strong {
  font-size: 15px;
}

.state-list small {
  color: var(--muted);
  font-size: 12px;
}

.closing-section {
  padding: 150px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  border-top: 1px solid var(--line-soft);
}

.closing-icon {
  width: 72px;
  height: 72px;
  margin-bottom: 36px;
  border-radius: 21px;
}

.closing-section p {
  margin: 24px 0 28px;
  color: var(--muted);
}

@media (max-width: 920px) {
  .home-hero,
  .fst-hero,
  .principle-section,
  .shortcut-section,
  .confidence-section {
    grid-template-columns: 1fr;
  }

  .home-hero {
    padding-top: 72px;
    gap: 24px;
  }

  .home-hero-copy {
    max-width: 690px;
  }

  .hero-object {
    min-height: 520px;
  }

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

  .product-card-future {
    min-height: 320px;
  }

  .principle-section,
  .confidence-section {
    gap: 60px;
  }

  .fst-hero {
    padding-top: 70px;
    gap: 15px;
  }

  .fst-hero-copy {
    max-width: 700px;
  }

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

  .experience-card {
    min-height: auto;
    display: grid;
    grid-template-columns: 0.85fr 1fr;
    grid-template-rows: auto auto 1fr;
    column-gap: 30px;
  }

  .experience-visual {
    grid-row: 1 / 4;
    margin: 0;
  }

  .shortcut-section {
    gap: 40px;
  }
}

@media (max-width: 680px) {
  .site-header,
  .home-hero,
  .product-section,
  .principle-section,
  .fst-hero,
  .experience-section,
  .shortcut-section,
  .confidence-section,
  .closing-section,
  .site-footer {
    width: min(calc(100% - 32px), var(--content));
  }

  .site-header {
    height: 76px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    border-radius: 11px;
  }

  .site-nav {
    gap: 11px;
  }

  .site-nav > a:not(.nav-login) {
    display: none;
  }

  .site-nav .nav-login {
    padding: 9px 13px;
    font-size: 12px;
  }

  .home-hero,
  .fst-hero {
    min-height: auto;
    padding: 72px 0 86px;
  }

  .home-hero h1,
  .fst-hero h1 {
    font-size: clamp(47px, 14vw, 65px);
  }

  .hero-lead,
  .fst-hero-copy > p {
    margin: 24px 0 29px;
    font-size: 15px;
    line-height: 1.8;
  }

  .hero-object {
    min-height: 435px;
    margin-top: 20px;
  }

  .hero-device {
    min-height: 410px;
    padding: 25px 23px;
    border-radius: 34px;
    transform: none;
  }

  .temperature-stage {
    min-height: 275px;
  }

  .environment-row > span + span {
    padding-left: 11px;
  }

  .product-section,
  .principle-section,
  .experience-section,
  .shortcut-section,
  .confidence-section {
    padding: 82px 0;
  }

  .section-heading {
    margin-bottom: 34px;
    display: block;
  }

  .section-heading > p {
    margin-top: 20px;
  }

  .section-heading h2,
  .principle-copy h2,
  .shortcut-copy h2,
  .confidence-section h2,
  .closing-section h2 {
    font-size: 36px;
  }

  .product-card {
    border-radius: 28px;
  }

  .product-card-featured {
    min-height: 650px;
    padding: 32px 26px;
    grid-template-columns: 1fr;
  }

  .product-visual {
    width: 88%;
    margin: 0 auto;
  }

  .product-card-future {
    min-height: 280px;
    padding: 34px 28px;
  }

  .principle-section {
    gap: 46px;
  }

  .site-footer {
    padding-top: 42px;
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-links {
    justify-content: flex-start;
    gap: 18px;
  }

  .footer-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.7;
  }

  .fst-app-preview {
    min-height: 650px;
    margin-top: 20px;
  }

  .phone-frame {
    width: min(100%, 322px);
  }

  .experience-card {
    padding: 15px 15px 30px;
    display: block;
  }

  .experience-visual {
    height: 270px;
    margin-bottom: 27px;
  }

  .shortcut-section {
    display: flex;
    flex-direction: column-reverse;
  }

  .shortcut-visual {
    width: 100%;
    min-height: 390px;
  }

  .shortcut-tile {
    width: min(92%, 330px);
    transform: translate(-12px, -46px);
  }

  .countdown-card {
    width: 210px;
    transform: translate(45px, 80px);
  }

  .confidence-section {
    gap: 55px;
  }

  .state-list article {
    grid-template-columns: 130px 1fr;
  }

  .closing-section {
    padding: 105px 0;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}