:root {
  --paper: #f4f7f8;
  --paper-deep: #e9eff1;
  --ink: #0c1624;
  --muted: #647184;
  --line: #d4dde2;
  --blue: #2457e6;
  --blue-deep: #163aa5;
  --cyan: #38cbbb;
  --orange: #f6a347;
  --white: #ffffff;
  --shadow: 0 20px 60px rgba(12, 22, 36, 0.08);
  --display: "Avenir Next", "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  --body: "SF Pro Text", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  --mono: "SFMono-Regular", "Roboto Mono", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.22;
  background-image: linear-gradient(rgba(12, 22, 36, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(12, 22, 36, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
}

#main-content:focus {
  outline: none;
}

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

button,
select {
  font: inherit;
}

button,
a,
select {
  outline-offset: 4px;
}

button:focus-visible,
a:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(36, 87, 230, 0.38);
  outline-offset: 4px;
}

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

img {
  display: block;
  max-width: 100%;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 8px 12px;
  color: var(--white);
  background: var(--ink);
  border-radius: 4px;
  transform: translateY(-160%);
}

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

.site-header,
.site-footer,
main > * {
  width: min(1180px, calc(100% - 48px));
  margin-right: auto;
  margin-left: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 84px;
  border-bottom: 1px solid var(--line);
}

.brand,
.site-nav,
.language-switch {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-family: var(--display);
  font-weight: 760;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  color: var(--white);
  font-size: 14px;
  font-weight: 800;
  background: var(--ink);
  border-radius: 9px 3px 9px 3px;
}

.brand-name {
  font-size: 18px;
}

.site-nav {
  gap: 28px;
  margin-left: auto;
  margin-right: 32px;
  color: var(--muted);
  font-size: 14px;
}

.site-nav a {
  position: relative;
  padding: 6px 0;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  content: "";
  background: var(--blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--ink);
}

.site-nav a.is-active::after,
.site-nav a:hover::after {
  transform: scaleX(1);
}

.language-switch {
  gap: 2px;
  padding: 3px;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: 7px;
}

.language-switch button {
  min-width: 37px;
  padding: 5px 8px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  background: transparent;
  border: 0;
  border-radius: 4px;
  cursor: pointer;
}

.language-switch button[aria-pressed="true"] {
  color: var(--white);
  background: var(--ink);
}

.page {
  padding: 94px 0 128px;
}

.page-narrow {
  max-width: 780px;
}

.feedback-page {
  min-height: calc(100svh - 84px - 68px);
  padding-top: 48px;
  padding-bottom: 32px;
}

.feedback-page .page-header {
  padding-bottom: 28px;
}

.feedback-page .page-header h1 {
  max-width: 760px;
  margin-top: 12px;
  font-size: clamp(48px, 5.6vw, 78px);
  line-height: 0.98;
}

.feedback-page .page-header .lead {
  max-width: 520px;
  font-size: 17px;
  line-height: 1.45;
}

.feedback-page .feedback-frame-wrap,
.feedback-page .feedback-placeholder {
  min-height: 0;
}

.eyebrow,
.utility-label,
.section-index {
  margin: 0;
  color: var(--blue-deep);
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  line-height: 1.4;
  text-transform: uppercase;
}

.eyebrow::before {
  display: inline-block;
  width: 22px;
  height: 2px;
  margin-right: 9px;
  content: "";
  vertical-align: middle;
  background: var(--orange);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: var(--display);
  letter-spacing: -0.04em;
}

h1 {
  max-width: 780px;
  margin-bottom: 26px;
  font-size: clamp(54px, 7.5vw, 112px);
  font-weight: 760;
  line-height: 0.95;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(34px, 4vw, 62px);
  font-weight: 720;
  line-height: 1.05;
}

h3 {
  margin-bottom: 9px;
  font-size: 22px;
  font-weight: 710;
  line-height: 1.15;
}

.lead {
  max-width: 600px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.65;
}

.muted {
  color: var(--muted);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: 68px;
  align-items: center;
  min-height: 610px;
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.hero-copy h1 span {
  display: block;
  color: var(--blue);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.button:hover:not(:disabled) {
  transform: translateY(-2px);
}

.button-primary {
  color: var(--white);
  background: var(--blue);
}

.button-primary:hover:not(:disabled) {
  background: var(--blue-deep);
}

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

.button-secondary:hover:not(:disabled) {
  background: var(--white);
  border-color: var(--ink);
}

.button-small {
  min-height: 38px;
  padding: 0 13px;
  font-size: 13px;
}

.button:disabled {
  color: #9ba6b1;
  background: #e5eaed;
  border-color: #dce3e7;
  cursor: not-allowed;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--blue-deep);
  font-size: 14px;
  font-weight: 700;
}

.text-link::after {
  content: "→";
  transition: transform 160ms ease;
}

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

.hero-visual {
  position: relative;
  min-height: 470px;
  overflow: hidden;
  background: var(--ink);
  border-radius: 12px 42px 12px 42px;
  box-shadow: var(--shadow);
}

.home-icon-stage {
  display: grid;
  min-height: 470px;
  place-items: center;
}

.home-app-icon {
  width: min(50%, 250px);
  aspect-ratio: 1;
  border-radius: 24%;
  box-shadow: 0 24px 64px rgba(12, 22, 36, 0.2);
}

.home-page {
  display: grid;
  min-height: calc(100svh - 84px - 68px);
  padding-top: clamp(28px, 4.5vh, 56px);
  padding-bottom: 20px;
}

.home-page .hero {
  min-height: 0;
}

.home-page h1 {
  margin-bottom: 18px;
  font-size: clamp(50px, 6.4vw, 94px);
}

.home-page .lead {
  margin-bottom: 22px;
  line-height: 1.52;
}

.home-page .hero-meta {
  margin-top: 20px;
}

.home-page .home-icon-stage {
  min-height: 0;
}

.hero-visual::before {
  position: absolute;
  top: 26px;
  right: 26px;
  width: 9px;
  height: 9px;
  content: "";
  background: var(--orange);
  border-radius: 50%;
  box-shadow: 22px 0 0 var(--cyan), 44px 0 0 var(--blue);
}

.visual-caption {
  position: absolute;
  top: 28px;
  left: 30px;
  color: rgba(255, 255, 255, 0.66);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.visual-phone {
  position: absolute;
  top: 88px;
  left: 12%;
  width: 176px;
  height: 324px;
  padding: 9px;
  background: #1b2a3d;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 27px;
  box-shadow: 18px 24px 0 rgba(0, 0, 0, 0.2);
  transform: rotate(-5deg);
}

.phone-screen {
  position: relative;
  height: 100%;
  padding: 20px 16px;
  overflow: hidden;
  background: var(--paper);
  border-radius: 19px;
}

.phone-topline {
  display: flex;
  justify-content: space-between;
  margin-bottom: 30px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
}

.phone-icon {
  width: 56px;
  margin-bottom: 18px;
  border-radius: 14px;
  box-shadow: 0 8px 16px rgba(12, 22, 36, 0.18);
}

.phone-screen h3 {
  margin-bottom: 5px;
  color: var(--ink);
  font-size: 19px;
}

.phone-screen p {
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.5;
}

.phone-row {
  display: grid;
  grid-template-columns: 14px 1fr 14px;
  gap: 7px;
  align-items: center;
  min-height: 31px;
  margin-bottom: 7px;
  padding: 0 8px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.phone-row strong {
  color: var(--ink);
  font-family: var(--body);
  font-size: 9px;
  font-weight: 700;
}

.signal-path {
  position: absolute;
  top: 230px;
  right: 8%;
  left: 36%;
  height: 2px;
  background: var(--cyan);
  transform: rotate(-8deg);
  box-shadow: 0 0 0 5px rgba(56, 203, 187, 0.12);
}

.signal-path::before,
.signal-path::after {
  position: absolute;
  top: 50%;
  width: 10px;
  height: 10px;
  content: "";
  background: var(--cyan);
  border-radius: 50%;
  transform: translateY(-50%);
}

.signal-path::before {
  left: 0;
}

.signal-path::after {
  right: 0;
  background: var(--orange);
}

.signal-wave {
  position: absolute;
  right: 10%;
  bottom: 142px;
  width: 116px;
  height: 116px;
  border: 1px solid rgba(56, 203, 187, 0.5);
  border-left-color: transparent;
  border-bottom-color: transparent;
  border-radius: 50%;
  transform: rotate(45deg);
}

.signal-wave::before,
.signal-wave::after {
  position: absolute;
  inset: 13px;
  content: "";
  border: 1px solid rgba(56, 203, 187, 0.34);
  border-left-color: transparent;
  border-bottom-color: transparent;
  border-radius: 50%;
}

.signal-wave::after {
  inset: 27px;
  border-color: rgba(56, 203, 187, 0.21);
  border-left-color: transparent;
  border-bottom-color: transparent;
}

.target-panel {
  position: absolute;
  right: 9%;
  bottom: 38px;
  width: 238px;
  padding: 18px;
  color: var(--white);
  background: #142237;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
}

.target-panel .utility-label {
  margin-bottom: 15px;
  color: var(--cyan);
  font-size: 9px;
}

.target-panel p {
  margin-bottom: 15px;
  color: rgba(255, 255, 255, 0.64);
  font-size: 11px;
}

.keycaps {
  display: flex;
  gap: 6px;
}

.keycap {
  display: grid;
  width: 43px;
  height: 35px;
  place-items: center;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 10px;
  background: var(--paper);
  border-radius: 4px;
  box-shadow: 0 3px 0 #9aa6ae;
}

.keycap:last-child {
  color: var(--white);
  background: var(--blue);
  box-shadow: 0 3px 0 var(--blue-deep);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 34px;
}

.platform-tag,
.status-chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
}

.platform-tag strong {
  margin-right: 5px;
  color: var(--ink);
  font-family: var(--body);
  font-size: 12px;
}

.section-rule {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 30px;
  align-items: start;
  padding: 58px 0;
  border-top: 1px solid var(--line);
}

.section-rule:last-child {
  border-bottom: 1px solid var(--line);
}

.section-index {
  padding-top: 9px;
  color: var(--muted);
}

.section-rule h2 {
  max-width: 670px;
  margin-bottom: 20px;
  font-size: clamp(32px, 4.2vw, 58px);
}

.section-intro {
  max-width: 620px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: 17px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.feature-item {
  min-height: 172px;
  padding: 20px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 7px;
}

.feature-item::before {
  display: block;
  width: 7px;
  height: 7px;
  margin-bottom: 38px;
  content: "";
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 12px 0 0 var(--blue), 24px 0 0 var(--orange);
}

.feature-item p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.project-strip {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 22px;
  align-items: center;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.mini-icon {
  width: 66px;
  border-radius: 17px;
  box-shadow: 0 8px 20px rgba(12, 22, 36, 0.15);
}

.project-strip h3 {
  margin-bottom: 4px;
}

.project-strip p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.page-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: end;
  padding-bottom: 60px;
}

.page-header h1 {
  margin-top: 14px;
  margin-bottom: 0;
  font-size: clamp(48px, 7vw, 92px);
}

.page-header .lead {
  max-width: 540px;
  margin-bottom: 0;
}

body.airpass-snap-route {
  overflow: hidden;
}

.page-detail {
  width: 100%;
  max-width: none;
  margin-right: 0;
  margin-left: 0;
  padding-right: max(16px, calc((100vw - 1180px) / 2));
  padding-left: max(16px, calc((100vw - 1180px) / 2));
  height: calc(100svh - 84px);
  overflow-y: auto;
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
  scrollbar-color: var(--line) transparent;
  scrollbar-width: thin;
}

.detail-snap-page {
  display: flex;
  min-height: calc(100svh - 84px);
  flex-direction: column;
  justify-content: center;
  padding: clamp(34px, 5vh, 64px) 0;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.detail-overview-grid {
  display: grid;
  grid-template-columns: minmax(300px, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(48px, 7vw, 96px);
  align-items: center;
}

.detail-icon-stage {
  display: grid;
  align-content: center;
  justify-items: center;
  min-height: 540px;
  border-right: 1px solid var(--line);
}

.detail-app-icon {
  width: min(58%, 300px);
  aspect-ratio: 1;
  margin-bottom: 30px;
  border-radius: 24%;
  box-shadow: 0 28px 72px rgba(12, 22, 36, 0.22);
}

.detail-icon-stage .utility-label {
  color: var(--muted);
  text-align: center;
}

.detail-overview-copy {
  padding-right: clamp(0px, 2vw, 24px);
}

.detail-overview-copy > .section-index {
  margin-bottom: 13px;
}

.detail-overview-copy > .eyebrow {
  margin-bottom: 18px;
}

.detail-overview-copy h1 {
  max-width: 720px;
  margin-bottom: 18px;
  font-size: clamp(42px, 5.2vw, 72px);
  line-height: 1.02;
}

.detail-intro {
  max-width: 620px;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 16px;
}

.detail-feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 24px;
  border-top: 1px solid var(--line);
}

.detail-feature-item {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  min-height: 112px;
  align-content: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.detail-feature-index {
  padding-top: 3px;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 700;
}

.detail-feature-item h2 {
  margin-bottom: 5px;
  font-size: 19px;
  letter-spacing: -0.025em;
}

.detail-feature-item p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.detail-next-link {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  margin-top: 22px;
  color: var(--blue-deep);
  font-size: 14px;
  font-weight: 700;
}

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

.detail-next-link:hover span {
  transform: translateY(4px);
}

.detail-download-page {
  justify-content: space-between;
  padding-top: clamp(28px, 4vh, 48px);
  padding-bottom: 0;
}

.detail-download-page .download-section {
  width: 100%;
  padding: 0;
  border-top: 0;
}

.detail-download-page .download-header {
  margin-bottom: 22px;
}

.detail-download-page .download-header h2 {
  font-size: clamp(36px, 4.2vw, 58px);
}

.coming-platforms {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.detail-page-footer {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: center;
  margin-top: 24px;
  border-top: 1px solid var(--line);
  text-align: center;
}

.detail-visual {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 28px;
  align-items: stretch;
  margin-bottom: 76px;
}

.detail-poster {
  position: relative;
  min-height: 410px;
  padding: 28px;
  overflow: hidden;
  color: var(--white);
  background: var(--ink);
  border-radius: 10px 32px 10px 32px;
}

.detail-poster .mini-icon {
  position: absolute;
  top: 28px;
  right: 28px;
  width: 82px;
  border-radius: 22px;
}

.detail-poster h2 {
  position: absolute;
  right: 28px;
  bottom: 29px;
  left: 28px;
  margin: 0;
  color: var(--white);
  font-size: clamp(38px, 5vw, 68px);
}

.poster-rail {
  position: absolute;
  top: 50%;
  right: -35px;
  left: 28px;
  height: 2px;
  background: var(--cyan);
  transform: rotate(-14deg);
}

.poster-rail::before,
.poster-rail::after {
  position: absolute;
  top: 50%;
  width: 12px;
  height: 12px;
  content: "";
  background: var(--orange);
  border-radius: 50%;
  transform: translateY(-50%);
}

.poster-rail::after {
  right: 25%;
  background: var(--blue);
}

.detail-copy {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px 0;
}

.detail-copy h2 {
  max-width: 530px;
}

.highlight-list {
  display: grid;
  gap: 0;
  max-width: 530px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.highlight-list li {
  display: flex;
  gap: 13px;
  align-items: center;
  padding: 14px 0;
  border-top: 1px solid var(--line);
  font-size: 15px;
  font-weight: 700;
}

.highlight-list li::before {
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  content: "";
  background: var(--blue);
  border-radius: 50%;
}

.highlight-list li:nth-child(2)::before {
  background: var(--cyan);
}

.highlight-list li:nth-child(3)::before {
  background: var(--orange);
}

.download-section {
  padding: 64px 0 78px;
  border-top: 1px solid var(--line);
}

.download-header {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 30px;
}

.download-header h2 {
  margin-bottom: 0;
}

.download-header p {
  max-width: 380px;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 14px;
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.download-item {
  display: flex;
  min-height: 318px;
  flex-direction: column;
  padding: 21px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 7px;
}

.download-item.coming {
  background: transparent;
}

.download-item-top {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 30px;
}

.download-item h3 {
  margin-bottom: 5px;
}

.download-item .platform-note {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.status-chip {
  min-height: 25px;
  padding: 0 8px;
  color: var(--blue-deep);
  font-size: 9px;
  white-space: nowrap;
}

.status-chip.pending {
  color: #a66a1d;
  background: #fff4e7;
  border-color: #f5d5aa;
}

.status-chip.coming-soon {
  color: var(--muted);
  background: var(--paper-deep);
}

.source-select-label {
  display: grid;
  gap: 7px;
  margin-bottom: 17px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.source-select {
  width: 100%;
  min-height: 42px;
  padding: 0 10px;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 5px;
}

.download-meta {
  display: grid;
  gap: 6px;
  margin-top: auto;
  margin-bottom: 18px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
}

.download-meta span {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  border-bottom: 1px dotted var(--line);
}

.download-meta strong {
  color: var(--ink);
  font-weight: 500;
  text-align: right;
}

.coming-copy {
  margin-top: auto;
  margin-bottom: 23px;
  color: var(--muted);
  font-size: 14px;
}

.platform-section {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 52px;
  align-items: start;
  padding: 76px 0;
  border-top: 1px solid var(--line);
}

.platform-section h2 {
  margin-bottom: 0;
}

.platform-section-copy {
  color: var(--muted);
}

.platform-section-copy p {
  margin-bottom: 24px;
}

.platform-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.platform-list li {
  display: grid;
  grid-template-columns: 145px 1fr;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.platform-list strong {
  color: var(--ink);
}

.platform-list span {
  color: var(--muted);
  font-size: 14px;
}

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

.feedback-frame-wrap {
  display: grid;
  height: clamp(420px, calc(100svh - 470px), 560px);
  min-height: 0;
  place-items: center;
  padding: 16px;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.feedback-device {
  position: relative;
  width: min(390px, 100%);
  height: 100%;
  overflow: hidden;
  background: var(--white);
  border: 7px solid var(--ink);
  border-radius: 24px;
  box-shadow: 0 14px 32px rgba(12, 22, 36, 0.16);
}

.feedback-device::before {
  position: absolute;
  top: 7px;
  left: 50%;
  z-index: 1;
  width: 58px;
  height: 5px;
  content: "";
  background: #556273;
  border-radius: 99px;
  transform: translateX(-50%);
}

.feedback-preview {
  display: flex;
  height: 100%;
  flex-direction: column;
  overflow: auto;
  padding: 30px 17px 18px;
  color: var(--ink);
  background: var(--white);
}

.feedback-preview-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 12px;
  color: var(--ink);
  font-family: var(--display);
  font-size: 17px;
  font-weight: 720;
  border-bottom: 1px solid var(--line);
}

.feedback-preview-status {
  width: 7px;
  height: 7px;
  background: var(--blue);
  border-radius: 50%;
}

.feedback-preview-lead {
  margin: 15px 0 18px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.feedback-preview-fields {
  display: grid;
  gap: 9px;
}

.feedback-preview-field {
  display: grid;
  gap: 5px;
  padding: 10px 11px;
  background: #f7f9fa;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.feedback-preview-field span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.feedback-preview-field strong {
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.35;
}

.feedback-preview-action {
  width: 100%;
  margin-bottom: 17px;
  min-height: 42px;
  font-size: 13px;
}

.feedback-preview-action:hover:not(:disabled) {
  transform: none;
}

.feedback-preview-action span {
  font-size: 15px;
}

.feedback-form {
  display: flex;
  height: 100%;
  flex-direction: column;
  overflow: auto;
  padding: 30px 17px 18px;
  color: var(--ink);
  background: var(--white);
}

.feedback-form .feedback-preview-lead {
  flex: 0 0 auto;
}

.feedback-field {
  display: grid;
  flex: 0 0 auto;
  gap: 5px;
  margin-bottom: 10px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.02em;
  line-height: 1.35;
}

.feedback-field input,
.feedback-field select,
.feedback-field textarea {
  width: 100%;
  min-width: 0;
  padding: 9px 10px;
  color: var(--ink);
  font-family: var(--body);
  font-size: 13px;
  letter-spacing: 0;
  line-height: 1.35;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 5px;
}

.feedback-field input,
.feedback-field select {
  min-height: 38px;
}

.feedback-field textarea {
  min-height: 88px;
  resize: vertical;
}

.feedback-field input:focus,
.feedback-field select:focus,
.feedback-field textarea:focus {
  outline: 3px solid rgba(36, 87, 230, 0.2);
  outline-offset: 1px;
  border-color: var(--blue);
}

.feedback-field input::placeholder,
.feedback-field textarea::placeholder {
  color: #8a96a4;
}

.feedback-check {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  flex: 0 0 auto;
  margin: 3px 0 11px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.4;
}

.feedback-check input {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--blue);
}

.feedback-honeypot {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.feedback-form-note {
  flex: 0 0 auto;
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.4;
}

.feedback-form-submit {
  width: 100%;
  min-height: 42px;
  flex: 0 0 auto;
  margin-top: auto;
}

.feedback-form-submit:disabled {
  cursor: wait;
  opacity: 0.62;
}

.feedback-form-status {
  min-height: 36px;
  flex: 0 0 auto;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.feedback-form-status strong {
  color: var(--ink);
  font-weight: 700;
}

.feedback-form-status.is-success {
  color: #167a67;
}

.feedback-form-status.is-error {
  color: #a33b36;
}

.feedback-device iframe {
  width: 100%;
  height: 100%;
  min-height: 0;
  border: 0;
}

.feedback-placeholder {
  display: grid;
  min-height: 430px;
  place-items: center;
  padding: 42px;
  text-align: center;
}

.feedback-placeholder p {
  max-width: 360px;
  margin: 0 auto 22px;
  color: var(--muted);
}

.contact-aside {
  padding-top: 7px;
}

.contact-aside h3 {
  margin-top: 17px;
}

.contact-aside p {
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 14px;
}

.feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.email-link {
  display: inline-flex;
  padding-bottom: 4px;
  color: var(--blue-deep);
  font-family: var(--mono);
  font-size: 12px;
  border-bottom: 1px solid var(--blue);
}

.privacy-copy {
  display: grid;
  gap: 48px;
  max-width: 740px;
}

.privacy-copy section {
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.privacy-copy h2 {
  margin-bottom: 12px;
  font-size: 28px;
}

.privacy-copy p,
.privacy-copy li {
  color: var(--muted);
  font-size: 16px;
}

.privacy-copy ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 20px;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 24px;
  align-items: center;
  padding-top: 22px;
  padding-bottom: 32px;
  color: var(--muted);
  font-size: 12px;
  border-top: 1px solid var(--line);
}

.site-footer.home-footer {
  display: flex;
  min-height: 68px;
  justify-content: center;
  padding-top: 16px;
  padding-bottom: 18px;
  text-align: center;
}

.site-footer.route-footer-hidden {
  display: none;
}

.home-footer-line {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
}

.home-footer-line a {
  color: var(--ink);
}

.site-footer p {
  margin: 0;
}

.site-footer nav {
  display: flex;
  gap: 18px;
}

.site-footer a:hover {
  color: var(--ink);
}

.footer-email {
  color: var(--ink);
  font-family: var(--mono);
  font-size: 11px;
}

.download-dialog {
  width: min(480px, calc(100% - 32px));
  padding: 0;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: 0 24px 80px rgba(12, 22, 36, 0.22);
}

.download-dialog::backdrop {
  background: rgba(12, 22, 36, 0.58);
}

.dialog-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 22px 15px;
  border-bottom: 1px solid var(--line);
}

.dialog-head h2 {
  margin: 5px 0 0;
  font-size: 28px;
}

.icon-button {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--muted);
  font-size: 25px;
  line-height: 1;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 5px;
  cursor: pointer;
}

.icon-button:hover {
  color: var(--ink);
  border-color: var(--ink);
}

.dialog-body {
  display: grid;
  gap: 18px;
  padding: 22px;
}

.copy-block {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 13px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.copy-block-label {
  display: block;
  margin-bottom: 4px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
}

.copy-block-value {
  overflow: hidden;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dialog-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 110;
  max-width: min(360px, calc(100% - 40px));
  padding: 12px 15px;
  color: var(--white);
  font-size: 13px;
  background: var(--ink);
  border-left: 3px solid var(--cyan);
  border-radius: 5px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 160ms ease, transform 160ms ease;
}

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

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 52px;
    min-height: 0;
  }

  .hero-visual {
    min-height: 430px;
  }

  .home-icon-stage {
    min-height: 340px;
  }

  body.airpass-snap-route {
    overflow: hidden;
  }

  .page-detail {
    scroll-snap-type: y proximity;
  }

  .detail-snap-page {
    min-height: calc(100svh - 84px);
    justify-content: flex-start;
  }

  .detail-overview-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .detail-icon-stage {
    min-height: 260px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .detail-app-icon {
    width: min(38%, 210px);
    margin-bottom: 22px;
  }

  .feature-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }

  .download-item {
    min-height: 285px;
  }

  .detail-visual,
  .platform-section {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .detail-poster {
    min-height: 350px;
  }

  .feedback-layout {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .feedback-page {
    min-height: 0;
    padding-top: 40px;
  }

  .feedback-page .feedback-frame-wrap {
    height: 520px;
  }
}

@media (max-width: 640px) {
  .site-header,
  .site-footer,
  main > * {
    width: min(100% - 32px, 1180px);
  }

  .site-header {
    min-height: 74px;
  }

  .site-nav {
    gap: 14px;
    margin-right: 12px;
    font-size: 12px;
  }

  .brand-name {
    display: none;
  }

  .page {
    padding: 62px 0 90px;
  }

  .feedback-page {
    min-height: 0;
    padding-top: 44px;
    padding-bottom: 72px;
  }

  .feedback-page .page-header {
    padding-bottom: 30px;
  }

  .feedback-page .page-header h1 {
    font-size: clamp(44px, 14vw, 64px);
  }

  h1 {
    font-size: clamp(50px, 17vw, 82px);
  }

  .hero-visual {
    min-height: 390px;
  }

  .home-icon-stage {
    min-height: 260px;
  }

  .home-app-icon {
    width: min(48%, 180px);
  }

  .page-detail {
    height: calc(100svh - 74px);
  }

  .detail-snap-page {
    min-height: calc(100svh - 74px);
    padding: 34px 0;
  }

  .detail-icon-stage {
    min-height: 220px;
  }

  .detail-app-icon {
    width: min(44%, 170px);
    margin-bottom: 18px;
  }

  .detail-overview-copy h1 {
    font-size: clamp(38px, 12vw, 54px);
  }

  .detail-feature-list {
    grid-template-columns: 1fr;
  }

  .detail-feature-item {
    min-height: 0;
  }

  .detail-download-page {
    padding-top: 34px;
  }

  .visual-phone {
    top: 80px;
    left: 4%;
    width: 145px;
    height: 270px;
  }

  .phone-screen {
    padding: 15px 12px;
  }

  .phone-icon {
    width: 44px;
    margin-bottom: 12px;
  }

  .phone-screen h3 {
    font-size: 16px;
  }

  .phone-screen p {
    margin-bottom: 17px;
    font-size: 9px;
  }

  .target-panel {
    right: 5%;
    bottom: 24px;
    width: 195px;
    padding: 14px;
  }

  .signal-path {
    right: 1%;
    left: 28%;
  }

  .signal-wave {
    right: 2%;
    bottom: 130px;
    width: 92px;
    height: 92px;
  }

  .section-rule {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 42px 0;
  }

  .section-index {
    padding-top: 0;
  }

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

  .project-strip .text-link {
    grid-column: 2;
  }

  .page-header {
    grid-template-columns: 1fr;
    gap: 18px;
    padding-bottom: 44px;
  }

  .detail-visual {
    margin-bottom: 48px;
  }

  .detail-poster {
    min-height: 290px;
    padding: 20px;
    border-radius: 8px 24px 8px 24px;
  }

  .detail-poster .mini-icon {
    top: 20px;
    right: 20px;
    width: 67px;
    border-radius: 18px;
  }

  .detail-poster h2 {
    right: 20px;
    bottom: 20px;
    left: 20px;
  }

  .poster-rail {
    left: 20px;
  }

  .platform-list li {
    grid-template-columns: 112px 1fr;
    gap: 12px;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .site-footer nav {
    order: 3;
  }

  .feedback-frame-wrap {
    height: 500px;
    min-height: 0;
    padding: 10px;
  }
}

@media (min-width: 901px) and (max-height: 900px) {
  .home-page {
    padding-top: 22px;
    padding-bottom: 14px;
  }

  .home-page h1 {
    margin-bottom: 14px;
    font-size: clamp(46px, 5.4vw, 78px);
  }

  .home-page .lead {
    margin-bottom: 16px;
    font-size: 16px;
  }

  .home-page .button {
    min-height: 42px;
  }

  .home-page .hero-meta {
    margin-top: 14px;
  }

  .home-page .home-app-icon {
    width: min(44%, 220px);
  }

  .detail-snap-page {
    padding-top: 26px;
    padding-bottom: 26px;
  }

  .detail-icon-stage {
    min-height: 430px;
  }

  .detail-overview-copy h1 {
    font-size: clamp(40px, 4.5vw, 62px);
  }

  .detail-feature-item {
    min-height: 96px;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .detail-download-page .download-item {
    min-height: 290px;
  }
}

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