:root {
  color-scheme: light;
  --paper: #f8f8f5;
  --paper-warm: #fff8ef;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-solid: #ffffff;
  --ink: #142033;
  --muted: #657184;
  --line: rgba(20, 32, 51, 0.1);
  --blue: #1676d2;
  --blue-deep: #0d4f9e;
  --blue-soft: #e9f3ff;
  --orange: #ff9536;
  --green: #27bd62;
  --shadow-sm: 0 18px 50px rgba(22, 50, 86, 0.08);
  --shadow-lg: 0 42px 110px rgba(14, 58, 108, 0.17);
  --radius-sm: 18px;
  --radius-md: 28px;
  --radius-lg: 44px;
  --content: 1180px;
  --reading: 760px;
  --font-display: ui-rounded, "SF Pro Rounded", "SF Pro Display", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 3%, rgba(66, 161, 255, 0.12), transparent 28rem),
    radial-gradient(circle at 92% 11%, rgba(255, 149, 54, 0.12), transparent 28rem),
    var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

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

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

:focus-visible {
  outline: 3px solid rgba(22, 118, 210, 0.42);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  border-radius: 12px;
  color: #fff;
  background: var(--ink);
  transform: translateY(-150%);
  transition: transform 180ms ease;
}

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

.shell {
  width: min(calc(100% - 40px), var(--content));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 30;
  top: 0;
  border-bottom: 1px solid rgba(20, 32, 51, 0.06);
  background: rgba(248, 248, 245, 0.76);
  backdrop-filter: saturate(160%) blur(22px);
  -webkit-backdrop-filter: saturate(160%) blur(22px);
}

.nav {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-family: var(--font-display);
  font-weight: 720;
  letter-spacing: -0.02em;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  box-shadow: 0 8px 20px rgba(10, 82, 155, 0.18);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  padding: 9px 13px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  transition: color 180ms ease, background 180ms ease;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.8);
}

.nav-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-left: 5px;
  padding: 8px 12px;
  border: 1px solid rgba(22, 118, 210, 0.14);
  border-radius: 999px;
  color: var(--blue-deep);
  background: var(--blue-soft);
  font-size: 13px;
  font-weight: 700;
}

.nav-status::before {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  content: "";
  box-shadow: 0 0 0 4px rgba(39, 189, 98, 0.12);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.86);
}

.menu-button span,
.menu-button::before,
.menu-button::after {
  display: block;
  width: 18px;
  height: 1.5px;
  margin: 4px auto;
  border-radius: 99px;
  background: var(--ink);
  content: "";
}

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(84px, 11vw, 150px) 0 100px;
  text-align: center;
}

.hero::before {
  position: absolute;
  inset: -10% 50% auto;
  width: 44rem;
  height: 44rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(45, 148, 244, 0.15), rgba(45, 148, 244, 0) 68%);
  content: "";
  transform: translateX(-50%);
  pointer-events: none;
}

.eyebrow {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 22px;
  color: var(--blue-deep);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
  content: "";
  box-shadow: 0 0 0 6px rgba(255, 149, 54, 0.12);
}

.hero h1,
.page-hero h1 {
  position: relative;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(54px, 8.7vw, 118px);
  font-weight: 760;
  letter-spacing: -0.068em;
  line-height: 0.98;
}

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

.hero-lead {
  position: relative;
  max-width: 680px;
  margin: 34px auto 0;
  color: var(--muted);
  font-size: clamp(19px, 2vw, 24px);
  line-height: 1.55;
}

.hero-actions {
  position: relative;
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 34px;
}

.button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

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

.button-primary {
  color: #fff;
  background: var(--ink);
  box-shadow: 0 13px 34px rgba(20, 32, 51, 0.2);
}

.button-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.button-arrow::after {
  content: "↘";
  font-size: 18px;
}

.availability {
  position: relative;
  margin: 20px 0 0;
  color: #7b8593;
  font-size: 13px;
}

.product-stage {
  position: relative;
  width: min(100%, 1040px);
  min-height: 770px;
  margin: 88px auto 0;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 72px;
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.95), transparent 34%),
    linear-gradient(135deg, #eaf5ff 0%, #fff7ea 52%, #ffeef0 100%);
  box-shadow: var(--shadow-lg);
  isolation: isolate;
}

.product-stage::after {
  position: absolute;
  z-index: -1;
  right: 7%;
  bottom: 4%;
  width: 52%;
  height: 20%;
  border-radius: 50%;
  background: rgba(20, 77, 142, 0.22);
  filter: blur(44px);
  content: "";
}

.floating-readout {
  position: absolute;
  z-index: 2;
  top: 80px;
  left: 68px;
  width: 360px;
  padding: 28px 30px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 28px;
  text-align: left;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-sm);
}

.floating-readout small {
  color: var(--muted);
  font-size: 13px;
  font-weight: 650;
}

.floating-time {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-top: 10px;
  font-family: var(--font-display);
  font-size: 48px;
  font-variant-numeric: tabular-nums;
  font-weight: 760;
  letter-spacing: -0.05em;
  line-height: 1;
}

.floating-time::after {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--orange);
  content: "";
  animation: pulse 1.8s ease-in-out infinite;
}

.stage-note {
  position: absolute;
  z-index: 2;
  bottom: 84px;
  left: 68px;
  max-width: 330px;
  margin: 0;
  color: var(--muted);
  text-align: left;
  font-size: 15px;
}

.stage-note strong {
  display: block;
  margin-bottom: 5px;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 22px;
}

.phone {
  position: absolute;
  z-index: 1;
  right: 8.5%;
  bottom: -72px;
  width: 390px;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 66px;
  background: #10151c;
  box-shadow: 0 44px 90px rgba(14, 53, 96, 0.3);
  transform: rotate(2.8deg);
}

.phone img {
  width: 100%;
  border-radius: 54px;
}

.section {
  padding: clamp(92px, 12vw, 156px) 0;
}

.section-tight {
  padding-top: 60px;
}

.section-heading {
  max-width: 820px;
  margin-bottom: 64px;
}

.section-heading.centered {
  margin-inline: auto;
  text-align: center;
}

.section-kicker {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0.12em;
}

.section-heading h2,
.privacy-panel h2,
.doc-section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(40px, 5.4vw, 72px);
  font-weight: 740;
  letter-spacing: -0.055em;
  line-height: 1.07;
}

.section-heading p {
  max-width: 660px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 20px;
}

.section-heading.centered p {
  margin-inline: auto;
}

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

.principle {
  min-height: 230px;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.principle-index {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--blue-deep);
  background: var(--blue-soft);
  font-size: 13px;
  font-weight: 760;
}

.principle h3,
.feature-copy h3,
.feature-card h3,
.doc-card h2,
.doc-card h3,
.faq-card h3 {
  margin: 24px 0 8px;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 720;
  letter-spacing: -0.035em;
  line-height: 1.2;
}

.principle p,
.feature-card p,
.feature-copy p,
.doc-card p,
.faq-card p {
  margin: 0;
  color: var(--muted);
}

.feature-split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  align-items: center;
  gap: clamp(48px, 9vw, 120px);
}

.feature-visual {
  position: relative;
  min-height: 650px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, #eaf5ff, #fff5e9 54%, #ffedf0);
  box-shadow: var(--shadow-sm);
}

.screen-crop {
  width: min(78%, 400px);
  height: 540px;
  overflow: hidden;
  border: 10px solid #131820;
  border-radius: 54px 54px 0 0;
  background: #fff;
  box-shadow: 0 32px 70px rgba(19, 58, 101, 0.25);
  transform: translateY(72px);
}

.screen-crop img {
  width: 100%;
}

.feature-copy h3 {
  margin: 0 0 18px;
  font-size: clamp(38px, 4.8vw, 64px);
}

.feature-copy p {
  max-width: 500px;
  font-size: 19px;
}

.feature-list {
  display: grid;
  gap: 16px;
  margin-top: 34px;
}

.feature-list-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  align-items: start;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.feature-list-item:first-child {
  border-top: 0;
}

.feature-list-item span {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  color: var(--blue-deep);
  background: var(--blue-soft);
  font-weight: 750;
}

.feature-list-item strong {
  display: block;
  margin-bottom: 3px;
  font-family: var(--font-display);
  font-size: 18px;
}

.feature-list-item p {
  font-size: 15px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.mac-showcase {
  padding: clamp(48px, 7vw, 86px);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 15% 12%, rgba(255, 255, 255, 0.94), transparent 32%),
    linear-gradient(145deg, #e7f3ff, #fff7e9 54%, #ffedef);
  box-shadow: var(--shadow-sm);
}

.mac-showcase .section-heading {
  margin-bottom: 50px;
}

.mac-window {
  overflow: hidden;
  border: 1px solid rgba(18, 28, 43, 0.12);
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 38px 80px rgba(18, 58, 102, 0.2);
}

.mac-window-bar {
  position: relative;
  height: 44px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 16px;
  border-bottom: 1px solid rgba(18, 28, 43, 0.08);
  background: rgba(250, 250, 250, 0.94);
}

.mac-window-bar span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #ff5f57;
}

.mac-window-bar span:nth-child(2) {
  background: #febc2e;
}

.mac-window-bar span:nth-child(3) {
  background: #28c840;
}

.mac-window-bar strong {
  position: absolute;
  left: 50%;
  color: #5e6673;
  font-size: 13px;
  transform: translateX(-50%);
}

.mac-window img {
  width: 100%;
}

.feature-card {
  min-height: 300px;
  padding: 34px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface-solid);
}

.feature-card.wide {
  grid-column: 1 / -1;
  min-height: 340px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 40px;
  color: #fff;
  border: 0;
  background: linear-gradient(132deg, #0c4f9d, #1789dd);
}

.feature-card.wide p {
  color: rgba(255, 255, 255, 0.74);
}

.feature-card h3 {
  margin-top: 24px;
  font-size: 30px;
}

.feature-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 17px;
  color: var(--blue-deep);
  background: var(--blue-soft);
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 760;
}

.feature-card.wide .feature-icon {
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
}

.mini-timeline {
  position: relative;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: space-around;
}

.mini-timeline::before {
  position: absolute;
  right: 8%;
  left: 8%;
  height: 2px;
  background: rgba(255, 255, 255, 0.25);
  content: "";
}

.mini-timeline span {
  position: relative;
  z-index: 1;
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
  font-size: 13px;
  font-weight: 720;
}

.mini-timeline span:nth-child(2) {
  background: var(--orange);
  border-color: transparent;
  box-shadow: 0 0 0 9px rgba(255, 149, 54, 0.16);
}

.privacy-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(46px, 7vw, 84px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #101a2a;
  color: #fff;
}

.privacy-panel::after {
  position: absolute;
  right: -10%;
  bottom: -60%;
  width: 42rem;
  height: 42rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(25, 137, 221, 0.38), transparent 65%);
  content: "";
}

.privacy-panel > * {
  position: relative;
  z-index: 1;
}

.privacy-panel h2 {
  max-width: 720px;
}

.privacy-panel > p {
  max-width: 680px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 20px;
}

.privacy-facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 48px 0 38px;
}

.privacy-fact {
  padding: 19px 18px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 17px;
  background: rgba(255, 255, 255, 0.06);
  font-size: 14px;
  font-weight: 650;
}

.privacy-fact::before {
  display: block;
  margin-bottom: 7px;
  color: #77c1ff;
  content: "✓";
  font-weight: 800;
}

.privacy-panel .button-secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.17);
  background: rgba(255, 255, 255, 0.08);
}

.site-footer {
  padding: 34px 0 46px;
  border-top: 1px solid var(--line);
}

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

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

.footer-links {
  display: flex;
  gap: 18px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

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

.page-hero {
  padding: clamp(88px, 11vw, 144px) 0 80px;
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(52px, 7vw, 88px);
}

.page-hero p {
  max-width: 690px;
  margin: 26px auto 0;
  color: var(--muted);
  font-size: 20px;
}

.page-meta {
  display: inline-flex;
  gap: 8px;
  margin-top: 24px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.68);
  font-size: 13px;
}

.doc-layout {
  width: min(calc(100% - 40px), var(--reading));
  margin: 0 auto;
  padding-bottom: 120px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 72px;
}

.summary-card {
  min-height: 150px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.86);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.summary-card strong {
  display: block;
  margin-bottom: 7px;
  font-family: var(--font-display);
  font-size: 21px;
}

.summary-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.summary-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  border-radius: 11px;
  color: var(--blue-deep);
  background: var(--blue-soft);
  font-size: 14px;
  font-weight: 800;
}

.doc-section {
  padding: 52px 0;
  border-top: 1px solid var(--line);
}

.doc-section:first-of-type {
  border-top: 0;
}

.doc-section h2 {
  margin-bottom: 22px;
  font-size: 34px;
}

.doc-section h3 {
  margin: 34px 0 10px;
  font-family: var(--font-display);
  font-size: 21px;
}

.doc-section p,
.doc-section li {
  color: var(--muted);
}

.doc-section p {
  margin: 0 0 16px;
}

.doc-section ul,
.doc-section ol {
  margin: 18px 0 0;
  padding-left: 1.3em;
}

.doc-section li + li {
  margin-top: 10px;
}

.doc-callout {
  margin: 26px 0;
  padding: 22px 24px;
  border-left: 4px solid var(--blue);
  border-radius: 0 17px 17px 0;
  background: var(--blue-soft);
  color: var(--blue-deep);
}

.doc-callout p {
  color: inherit;
}

.steps {
  display: grid;
  gap: 14px;
  margin-bottom: 72px;
}

.step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 18px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface-solid);
}

.step-number {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 17px;
  color: #fff;
  background: linear-gradient(135deg, var(--blue-deep), var(--blue));
  font-family: var(--font-display);
  font-weight: 760;
}

.step h2 {
  margin: 0 0 5px;
  font-family: var(--font-display);
  font-size: 22px;
}

.step p {
  margin: 0;
  color: var(--muted);
}

.faq-grid {
  display: grid;
  gap: 12px;
}

.faq-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.68);
}

.faq-card h3 {
  margin: 0 0 9px;
  font-size: 20px;
}

.support-banner {
  margin-top: 68px;
  padding: 34px;
  border-radius: 28px;
  color: #fff;
  background: linear-gradient(135deg, #113d72, #1676d2);
}

.support-banner h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 29px;
}

.support-banner p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
}

.support-banner ul {
  margin: 20px 0 0;
  padding-left: 1.2em;
}

.support-banner li + li {
  margin-top: 6px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 42px;
  color: var(--blue-deep);
  font-weight: 700;
}

.back-link::before {
  content: "←";
}

.not-found {
  min-height: calc(100vh - 150px);
  display: grid;
  place-items: center;
  padding: 80px 20px;
  text-align: center;
}

.not-found strong {
  display: block;
  color: var(--blue);
  font-family: var(--font-display);
  font-size: clamp(90px, 18vw, 180px);
  letter-spacing: -0.08em;
  line-height: 0.9;
}

.not-found h1 {
  margin: 26px 0 10px;
  font-family: var(--font-display);
  font-size: 36px;
}

.not-found p {
  margin: 0 0 28px;
  color: var(--muted);
}

.js [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 700ms cubic-bezier(0.2, 0.8, 0.2, 1), transform 700ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.js [data-reveal][data-visible="true"] {
  opacity: 1;
  transform: none;
}

@keyframes pulse {
  0%, 100% { transform: scale(0.88); opacity: 0.72; }
  50% { transform: scale(1.12); opacity: 1; }
}

@media (max-width: 900px) {
  .product-stage {
    min-height: 810px;
  }

  .floating-readout {
    top: 56px;
    left: 44px;
    width: 310px;
  }

  .stage-note {
    bottom: 52px;
    left: 44px;
    max-width: 270px;
  }

  .phone {
    right: 4%;
    width: 350px;
  }

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

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

  .feature-visual {
    min-height: 610px;
  }
}

@media (max-width: 720px) {
  body {
    font-size: 16px;
  }

  .shell,
  .doc-layout {
    width: min(calc(100% - 28px), var(--content));
  }

  .nav {
    min-height: 64px;
  }

  .menu-button {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 58px;
    right: 14px;
    left: 14px;
    display: none;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: rgba(250, 250, 248, 0.96);
    box-shadow: var(--shadow-sm);
  }

  .nav-links[data-open="true"] {
    display: grid;
  }

  .nav-links a {
    padding: 12px 14px;
  }

  .nav-status {
    display: none;
  }

  .hero {
    padding: 74px 0 80px;
  }

  .hero h1 {
    font-size: clamp(51px, 16vw, 72px);
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .product-stage {
    min-height: 730px;
    margin-top: 62px;
    border-radius: 40px;
  }

  .floating-readout {
    z-index: 3;
    top: 28px;
    right: 22px;
    left: 22px;
    width: auto;
    padding: 20px 22px;
  }

  .floating-time {
    font-size: 39px;
  }

  .phone {
    right: 50%;
    bottom: -46px;
    width: min(82%, 350px);
    transform: translateX(50%) rotate(1deg);
  }

  .stage-note {
    display: none;
  }

  .section {
    padding: 92px 0;
  }

  .section-heading {
    margin-bottom: 40px;
  }

  .section-heading h2,
  .privacy-panel h2 {
    font-size: 40px;
  }

  .principle-grid,
  .feature-grid,
  .privacy-facts,
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .principle {
    min-height: 0;
  }

  .feature-visual {
    min-height: 560px;
  }

  .feature-card.wide {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .mac-showcase {
    padding: 34px 18px 18px;
    border-radius: 32px;
  }

  .mac-showcase .section-heading {
    margin-bottom: 32px;
  }

  .mac-window {
    border-radius: 16px;
  }

  .privacy-panel {
    padding: 38px 26px;
    border-radius: 32px;
  }

  .footer-grid {
    align-items: flex-start;
    flex-direction: column;
  }

  .page-hero {
    padding: 76px 0 58px;
  }

  .page-hero h1 {
    font-size: 52px;
  }

  .steps {
    gap: 10px;
  }

  .step {
    grid-template-columns: 42px 1fr;
    padding: 20px;
  }

  .step-number {
    width: 42px;
    height: 42px;
    border-radius: 14px;
  }
}

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

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