:root {
  color-scheme: light;
  --white: #ffffff;
  --ice: #eefbff;
  --water: #56cbed;
  --water-soft: #aeeeff;
  --cyan: #41d9ee;
  --cobalt: #1265c9;
  --ink: #061a2d;
  --ink-soft: #173b54;
  --muted: #506779;
  --coral: #ff5d3d;
  --coral-dark: #dd3f25;
  --line: rgba(42, 203, 226, 0.62);
  --shell: min(91vw, 1560px);
  --radius: 6px;
  --header-height: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--white);
  color: var(--ink);
  font-family:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
kbd {
  font: inherit;
}

svg {
  display: block;
}

.page-shell {
  width: var(--shell);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  transform: translateY(-160%);
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--white);
  font-size: 14px;
}

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

.site-header {
  position: fixed;
  z-index: 50;
  inset: 0 0 auto;
  display: flex;
  min-height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  padding-inline: max(4.5vw, 24px);
  border-bottom: 1px solid transparent;
  transition:
    background-color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.site-header.is-scrolled,
.site-header.menu-visible {
  border-color: rgba(6, 26, 45, 0.08);
  background: var(--white);
  box-shadow: 0 4px 22px rgba(5, 37, 59, 0.08);
}

.brand {
  position: relative;
  z-index: 2;
  color: var(--ink);
  font-size: 22px;
  font-weight: 760;
  line-height: 1;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(24px, 3vw, 48px);
  font-size: 15px;
  font-weight: 650;
}

.language-switch {
  display: inline-grid;
  padding: 3px;
  grid-template-columns: repeat(2, minmax(36px, auto));
  border: 1px solid rgba(6, 26, 45, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.38);
  font-size: 12px;
  font-weight: 760;
  line-height: 1;
}

.language-switch a,
.language-switch span {
  display: grid;
  min-width: 36px;
  height: 30px;
  padding-inline: 8px;
  place-items: center;
  border-radius: 4px;
}

.language-switch a {
  color: var(--ink-soft);
  transition: background-color 180ms ease, color 180ms ease;
}

.language-switch a:hover,
.language-switch a:focus-visible {
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
}

.language-switch [aria-current="page"] {
  background: var(--white);
  box-shadow: 0 3px 10px rgba(5, 37, 59, 0.12);
  color: var(--ink);
}

.site-nav > a:not(.button) {
  position: relative;
  padding-block: 12px;
}

.site-nav > a:not(.button)::after,
.site-footer nav a::after {
  position: absolute;
  right: 0;
  bottom: 6px;
  left: 0;
  height: 2px;
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  background: var(--coral);
  transition: transform 220ms var(--ease);
}

.site-nav > a:not(.button):hover::after,
.site-nav > a:not(.button):focus-visible::after,
.site-footer nav a:hover::after,
.site-footer nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-toggle {
  position: relative;
  z-index: 2;
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.nav-toggle span {
  position: absolute;
  left: 10px;
  width: 22px;
  height: 2px;
  background: currentColor;
  transition: transform 220ms var(--ease), top 220ms var(--ease);
}

.nav-toggle span:first-child {
  top: 16px;
}

.nav-toggle span:last-child {
  top: 24px;
}

.nav-toggle[aria-expanded="true"] span:first-child {
  top: 20px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:last-child {
  top: 20px;
  transform: rotate(-45deg);
}

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 720;
  line-height: 1;
  transition:
    transform 180ms var(--ease),
    box-shadow 180ms var(--ease),
    background-color 180ms ease,
    border-color 180ms ease;
}

.button svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

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

.button:active {
  transform: translateY(0);
}

.button--primary {
  background: var(--coral);
  box-shadow: 0 10px 24px rgba(222, 58, 29, 0.2);
  color: var(--white);
}

.button--primary:hover {
  background: var(--coral-dark);
  box-shadow: 0 14px 30px rgba(222, 58, 29, 0.27);
}

.button--secondary {
  border-color: rgba(6, 26, 45, 0.16);
  background: var(--white);
  color: var(--ink);
}

.button--secondary:hover {
  border-color: rgba(6, 26, 45, 0.34);
  box-shadow: 0 10px 24px rgba(5, 37, 59, 0.1);
}

.button--small {
  min-height: 38px;
  padding-inline: 20px;
  font-size: 14px;
}

.hero {
  position: relative;
  height: calc(100svh - 96px);
  min-height: 700px;
  max-height: 880px;
  overflow: hidden;
  background: var(--water);
  isolation: isolate;
}

.hero picture {
  position: absolute;
  inset: 0;
}

.hero__art {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  user-select: none;
  transition: transform 1.4s var(--ease);
}

.hero.is-loaded .hero__art {
  transform: scale(1.01);
}

.hero__content {
  position: relative;
  z-index: 1;
  display: flex;
  height: 100%;
  align-items: center;
  padding-top: var(--header-height);
}

.hero__copy {
  width: min(28.5vw, 420px);
}

.hero h1,
.section-heading h2,
.download h2 {
  margin: 0;
  font-weight: 790;
  letter-spacing: 0;
  text-wrap: balance;
}

.hero h1 {
  font-size: 64px;
  line-height: 0.96;
}

.hero__headline {
  margin: 18px 0 0;
  color: var(--ink);
  font-size: 28px;
  font-weight: 720;
  line-height: 1.22;
}

.hero__headline + p {
  max-width: 430px;
  margin: 30px 0 0;
  color: var(--ink-soft);
  font-size: 17px;
  font-weight: 520;
  line-height: 1.65;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.system-note {
  margin: 13px 0 0;
  color: rgba(6, 26, 45, 0.72);
  font-size: 13px;
  font-weight: 600;
}

.scroll-cue {
  position: absolute;
  z-index: 2;
  bottom: 22px;
  left: 50%;
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  transform: translateX(-50%);
  color: var(--white);
}

.scroll-cue svg {
  width: 28px;
  height: 28px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
  animation: cue 1.8s ease-in-out infinite;
}

.section {
  position: relative;
  padding-block: clamp(96px, 10vw, 172px);
}

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

.section.features {
  min-height: 900px;
  padding: 82px 0 46px;
  overflow: hidden;
  background-image: url("assets/lane-flow-diagonal-v2.webp");
  background-position: center;
  background-size: cover;
}

.section--ink {
  background: #031321;
  color: var(--white);
}

.section.shortcuts {
  min-height: 880px;
  padding: 86px 0 64px;
  overflow: hidden;
  background-color: #031321;
  background-image: url("assets/lane-ripples-dark-v2.webp");
  background-position: center;
  background-size: cover;
}

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

.privacy {
  overflow: hidden;
}

.privacy::before {
  position: absolute;
  z-index: 0;
  inset: 0;
  content: "";
  background-image: url("assets/lane-still-light-v2.webp");
  background-position: center right;
  background-size: cover;
  opacity: 0.52;
}

.section-heading {
  max-width: 1060px;
}

.section-heading h2,
.download h2 {
  color: var(--ink);
  font-size: 72px;
  line-height: 1.08;
}

.section-heading > p {
  max-width: 780px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 21px;
  line-height: 1.65;
}

.section-heading--light h2 {
  color: var(--white);
}

.section-heading--light > p {
  color: #aac6d9;
}

.feature-lanes {
  position: relative;
  z-index: 1;
  display: grid;
  width: 100vw;
  margin-top: clamp(64px, 7vw, 104px);
  margin-left: calc(50% - 50vw);
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-lane {
  min-height: 390px;
  padding: 34px max(4.5vw, 34px) 96px;
}

.feature-lane__number {
  display: block;
  margin-bottom: 34px;
  color: var(--coral);
  font-size: 46px;
  font-weight: 780;
  line-height: 1;
}

.feature-lane h3 {
  margin: 0;
  font-size: 29px;
  line-height: 1.2;
}

.feature-lane p {
  max-width: 250px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.shortcuts__layout {
  position: relative;
  z-index: 1;
}

.shortcuts .section-heading {
  max-width: 820px;
}

.shortcut-note {
  display: block;
  margin-top: 28px;
  color: #66879d;
  font-size: 14px;
}

.shortcut-list {
  margin-top: 38px;
  margin-left: clamp(180px, 25vw, 380px);
  border-top: 1px solid rgba(65, 217, 238, 0.65);
}

.shortcut-row {
  position: relative;
  display: grid;
  min-height: 126px;
  align-items: center;
  padding: 22px 4px;
  grid-template-columns: minmax(150px, 0.72fr) auto minmax(210px, 1fr);
  gap: clamp(22px, 3vw, 48px);
  border-bottom: 1px solid rgba(65, 217, 238, 0.65);
  transition: background-color 180ms ease, padding-inline 180ms var(--ease);
}

.shortcut-row::before {
  position: absolute;
  top: 38px;
  bottom: 38px;
  left: 0;
  width: 2px;
  content: "";
  background: var(--cyan);
  box-shadow: 0 0 14px rgba(65, 217, 238, 0.56);
}

.shortcut-row:hover {
  padding-inline: 14px;
  background: rgba(86, 203, 237, 0.08);
}

.shortcut-row__title {
  padding-left: 28px;
}

.shortcut-row h3 {
  margin: 0;
  font-size: 25px;
  line-height: 1.2;
}

.shortcut-row__detail {
  display: flex;
  min-width: 0;
  align-items: center;
}

.shortcut-row__detail::before {
  min-width: 26px;
  height: 2px;
  flex: 1;
  content: "";
  background: #5ce0ff;
  box-shadow: 0 0 10px rgba(92, 224, 255, 0.9);
}

.shortcut-row__detail > span {
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: #ff8a68;
  box-shadow: 0 0 16px rgba(255, 93, 61, 0.48);
}

.shortcut-row__detail p {
  margin: 0 0 0 16px;
  color: #aac6d9;
  font-size: 15px;
  white-space: nowrap;
}

.key-group {
  display: flex;
  width: 224px;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

kbd {
  display: grid;
  min-width: 58px;
  height: 58px;
  padding-inline: 12px;
  place-items: center;
  border: 1px solid #d4e9f4;
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 5px 0 #57c8e9, 0 11px 22px rgba(0, 0, 0, 0.22);
  color: var(--ink);
  font-size: 22px;
  font-weight: 700;
}

.key--wide {
  min-width: 88px;
  font-size: 15px;
}

.privacy__content {
  position: relative;
  z-index: 1;
}

.privacy .section-heading {
  max-width: 1100px;
}

.privacy-points {
  display: grid;
  margin: clamp(64px, 7vw, 110px) 0 0;
  padding: 0;
  grid-template-columns: repeat(3, 1fr);
  list-style: none;
}

.privacy-points li {
  display: grid;
  min-height: 168px;
  align-content: center;
  align-items: center;
  padding: 24px clamp(24px, 3vw, 52px);
  grid-template-columns: 64px 1fr;
  border-left: 1px solid var(--line);
}

.privacy-points li:last-child {
  border-right: 1px solid var(--line);
}

.privacy-points strong {
  grid-column: 2;
  font-size: 29px;
}

.privacy-points span {
  grid-column: 2;
  margin-top: 10px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
}

.privacy-points svg {
  width: 46px;
  height: 46px;
  grid-row: 1 / span 2;
  fill: none;
  stroke: var(--cobalt);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.download {
  min-height: 680px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background-color: #66d2f0;
  background-image: url("assets/lane-water-cta.webp");
  background-position: center;
  background-size: cover;
}

.download__content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.download h2 {
  font-size: 88px;
}

.download p {
  margin: 24px 0 0;
  color: var(--ink-soft);
  font-size: 24px;
}

.download__actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 38px;
}

.site-footer {
  padding-block: 34px;
  background: var(--ink);
  color: var(--white);
}

.site-footer__inner {
  display: grid;
  align-items: center;
  grid-template-columns: 1fr auto 1fr;
  gap: 42px;
}

.brand--footer {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--white);
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  overflow: hidden;
  grid-template-columns: repeat(2, 1fr);
  border: 1px solid rgba(174, 238, 255, 0.72);
  border-radius: var(--radius);
  background: #167bcc;
  box-shadow: inset 0 0 18px rgba(174, 238, 255, 0.25);
}

.brand-mark span {
  display: grid;
  place-items: center;
  border-right: 1px solid rgba(255, 255, 255, 0.28);
  border-bottom: 1px solid rgba(255, 255, 255, 0.28);
  color: var(--white);
  font-size: 11px;
  font-weight: 780;
}

.brand-mark span:nth-child(even) {
  border-right: 0;
}

.brand-mark span:nth-child(n + 3) {
  border-bottom: 0;
}

.site-footer nav {
  display: flex;
  gap: 34px;
}

.site-footer nav a {
  position: relative;
  padding-block: 8px;
  color: #c5d6e2;
  font-size: 14px;
}

.site-footer p {
  justify-self: end;
  margin: 0;
  color: #7e9aae;
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
}

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

:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 4px;
}

@keyframes cue {
  0%,
  100% {
    transform: translateY(-3px);
  }

  50% {
    transform: translateY(5px);
  }
}

@media (max-width: 1024px) {
  :root {
    --shell: min(90vw, 900px);
  }

  .hero__copy {
    width: min(29vw, 310px);
  }

  .hero h1 {
    font-size: 56px;
  }

  .hero__headline {
    font-size: 26px;
  }

  .section-heading h2 {
    font-size: 60px;
  }

  .download h2 {
    font-size: 72px;
  }

  .feature-lane {
    min-height: 360px;
    padding-inline: 3.5vw;
  }

  .feature-lane h3 {
    font-size: 25px;
  }

  .shortcut-list {
    margin-left: 0;
  }

  .shortcut-row {
    grid-template-columns: minmax(140px, 0.7fr) auto minmax(180px, 0.8fr);
    gap: 22px;
  }

  .shortcut-row__detail p {
    font-size: 14px;
  }

  .site-footer__inner {
    grid-template-columns: 1fr auto;
  }

  .site-footer p {
    grid-column: 1 / -1;
    justify-self: start;
  }
}

@media (max-width: 760px) {
  :root {
    --header-height: 64px;
    --shell: calc(100vw - 40px);
  }

  .site-header {
    padding-inline: 20px;
  }

  .brand {
    font-size: 19px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: var(--header-height) 0 auto;
    display: grid;
    gap: 0;
    padding: 12px 20px 24px;
    transform: translateY(-140%);
    border-bottom: 1px solid rgba(6, 26, 45, 0.08);
    background: var(--white);
    box-shadow: 0 16px 28px rgba(5, 37, 59, 0.1);
    transition: transform 280ms var(--ease);
  }

  .site-nav.is-open {
    transform: translateY(0);
  }

  .site-nav > a:not(.button) {
    padding: 17px 4px;
    border-bottom: 1px solid rgba(6, 26, 45, 0.08);
  }

  .site-nav .button {
    margin-top: 16px;
  }

  .site-nav .language-switch {
    width: max-content;
    margin-top: 16px;
  }

  .hero {
    height: calc(100svh - 48px);
    min-height: 720px;
    max-height: 740px;
  }

  .hero__art {
    object-fit: cover;
    object-position: center;
  }

  .hero__content {
    display: block;
    padding-top: calc(var(--header-height) + 34px);
  }

  .hero__copy {
    width: 100%;
  }

  .hero h1 {
    font-size: 46px;
  }

  .hero__headline {
    margin-top: 12px;
    font-size: 21px;
  }

  .hero__headline + p {
    max-width: 350px;
    margin-top: 22px;
    font-size: 15px;
    line-height: 1.6;
  }

  .hero__actions {
    margin-top: 16px;
  }

  .hero__actions .button {
    min-height: 46px;
  }

  .system-note {
    margin-top: 11px;
  }

  .scroll-cue {
    display: none;
  }

  .section {
    padding-block: 84px;
  }

  .section-heading h2,
  .download h2 {
    font-size: 42px;
  }

  .section-heading > p {
    margin-top: 18px;
    font-size: 16px;
  }

  .feature-lanes {
    margin-top: 48px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-top: 1px solid var(--line);
  }

  .section.features {
    min-height: 0;
    padding: 78px 0 30px;
    background-position: center;
    background-size: auto 100%;
  }

  .feature-lane {
    min-height: 270px;
    padding: 30px 20px 70px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .feature-lane__number {
    margin-bottom: 18px;
    font-size: 34px;
  }

  .feature-lane h3 {
    font-size: 23px;
  }

  .feature-lane p {
    margin-top: 12px;
    font-size: 14px;
    line-height: 1.65;
  }

  .section.shortcuts {
    min-height: 0;
    padding-block: 84px;
    background-position: center;
    background-size: auto 100%;
  }

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

  .shortcut-list {
    margin-top: 42px;
  }

  .shortcut-row {
    min-height: 174px;
    padding: 24px 0;
    grid-template-columns: 1fr auto;
    gap: 22px 16px;
  }

  .shortcut-row:hover {
    padding-inline: 0;
  }

  .shortcut-row::before {
    top: 28px;
    bottom: 28px;
  }

  .shortcut-row__title {
    padding-left: 20px;
  }

  .shortcut-row h3 {
    font-size: 22px;
  }

  .shortcut-row__detail {
    grid-column: 1 / -1;
    padding-left: 20px;
  }

  .key-group {
    width: auto;
    justify-content: flex-end;
  }

  kbd {
    min-width: 48px;
    height: 48px;
    font-size: 19px;
  }

  .key--wide {
    min-width: 74px;
    font-size: 14px;
  }

  .privacy-points {
    margin-top: 52px;
    grid-template-columns: 1fr;
  }

  .privacy-points li {
    min-height: 132px;
    padding: 24px 28px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .privacy-points li:first-child {
    border-top: 1px solid var(--line);
  }

  .download {
    min-height: 560px;
    background-position: center;
  }

  .download__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .site-footer nav {
    flex-wrap: wrap;
    gap: 24px;
  }

  .site-footer p {
    grid-column: auto;
  }
}

@media (max-width: 420px) {
  .hero {
    min-height: 730px;
  }

  .hero__actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .hero__actions .button {
    padding-inline: 12px;
    font-size: 13px;
  }

  .key-group {
    gap: 8px;
  }

  kbd {
    min-width: 44px;
    height: 44px;
  }

  .key--wide {
    min-width: 70px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

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