:root {
  --ink: #0e2a3c;
  --ink-soft: #2c4557;
  --muted: #5f7584;
  --faint: #8195a2;
  --blue: #1f6e9f;
  --blue-deep: #145475;
  --blue-dark: #0c3853;
  --mint: #dff3ed;
  --amber: #f7b955;
  --surface: #ffffff;
  --page: #f5f9ff;
  --line: rgba(18, 63, 88, 0.11);
  --line-strong: rgba(18, 63, 88, 0.18);
  --shadow: 0 24px 70px rgba(18, 63, 88, 0.12);
  --radius: 24px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button,
summary {
  font: inherit;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  transform: translateY(-160%);
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--blue-dark);
  color: #fff;
  font-size: 14px;
  transition: transform 0.2s ease;
}

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

.shell {
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid transparent;
  background: rgba(245, 249, 255, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(245, 249, 255, 0.94);
}

.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  gap: 30px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex-shrink: 0;
}

.brand-text {
  display: grid;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 16px;
  letter-spacing: -0.01em;
}

.brand-text small {
  margin-top: 3px;
  color: var(--faint);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 600;
}

.site-nav a {
  position: relative;
  padding: 4px 0;
}

.site-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  border-radius: 2px;
  background: var(--blue);
  transition: transform 0.2s ease;
}

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

.header-download {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex-shrink: 0;
  min-height: 40px;
  padding: 0 18px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--blue-deep);
  font-size: 13px;
  font-weight: 700;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.header-download svg {
  width: 16px;
  height: 16px;
}

.header-download:hover {
  transform: translateY(-1px);
  border-color: rgba(31, 110, 159, 0.35);
  background: #fff;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 0;
  background:
    radial-gradient(720px 440px at 84% 16%, rgba(120, 190, 225, 0.22), transparent 62%),
    radial-gradient(560px 420px at 12% 84%, rgba(191, 232, 219, 0.28), transparent 62%),
    linear-gradient(180deg, #f8fbff 0%, var(--page) 78%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(31, 110, 159, 0.12) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.32), transparent 58%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.32), transparent 58%);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.96fr);
  align-items: center;
  gap: 40px;
  min-height: 570px;
  padding-bottom: 44px;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 610px;
  padding-bottom: 20px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 18px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.11em;
}

.eyebrow > span {
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.hero h1 {
  margin: 0;
  font-size: clamp(38px, 5.4vw, 64px);
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 1.14;
}

.hero h1 em {
  position: relative;
  color: var(--blue);
  font-style: normal;
}

.hero h1 em::after {
  content: "";
  position: absolute;
  right: 1%;
  bottom: 3px;
  left: 1%;
  z-index: -1;
  height: 12px;
  border-radius: 999px;
  background: rgba(110, 185, 220, 0.24);
}

.lede {
  max-width: 520px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 48px;
  padding: 0 23px;
  border: 1px solid transparent;
  border-radius: 13px;
  font-size: 14px;
  font-weight: 750;
  line-height: 1.2;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.button svg {
  width: 19px;
  height: 19px;
  flex-shrink: 0;
}

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

.button-primary {
  background: linear-gradient(135deg, #2b82b4, var(--blue-deep));
  color: #fff;
  box-shadow: 0 15px 30px rgba(20, 84, 117, 0.23);
}

.button-primary:hover {
  box-shadow: 0 19px 36px rgba(20, 84, 117, 0.29);
}

.button-quiet {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink-soft);
}

.button-quiet:hover {
  background: #fff;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin: 19px 0 0;
  color: var(--faint);
  font-size: 12px;
  font-weight: 600;
}

.hero-meta .dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.6;
}

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 560px;
}

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
}

.glow-one {
  top: 40px;
  right: 20px;
  width: 330px;
  height: 330px;
  background: radial-gradient(circle, rgba(85, 161, 201, 0.22), transparent 68%);
}

.glow-two {
  bottom: 34px;
  left: 8px;
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(105, 190, 160, 0.18), transparent 68%);
}

.phone {
  position: relative;
  z-index: 2;
  width: min(322px, 86vw);
  padding: 15px 15px 18px;
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 39px;
  background: linear-gradient(180deg, #f9fcff, #edf5fc);
  box-shadow:
    0 40px 90px rgba(20, 65, 92, 0.22),
    0 8px 20px rgba(20, 65, 92, 0.08),
    inset 0 0 0 1px rgba(255, 255, 255, 0.6);
  transform: rotate(-1.5deg);
}

.phone::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  width: 72px;
  height: 5px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: rgba(14, 42, 60, 0.13);
}

.phone-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px 0;
  color: #426074;
  font-size: 10px;
  font-weight: 700;
}

.phone-status {
  display: flex;
  align-items: flex-end;
  gap: 2px;
}

.phone-status i {
  display: block;
  width: 3px;
  border-radius: 2px;
  background: currentColor;
}

.phone-status i:nth-child(1) { height: 5px; }
.phone-status i:nth-child(2) { height: 8px; }
.phone-status i:nth-child(3) { height: 11px; }

.app-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px 12px 12px;
}

.app-head p {
  margin: 0;
  color: #7693a6;
  font-size: 10px;
  font-weight: 600;
}

.app-head h2 {
  margin: 1px 0 0;
  color: #123a53;
  font-size: 20px;
  letter-spacing: -0.04em;
}

.avatar {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border-radius: 11px;
  background: #d9ebf6;
  color: #2c759d;
  font-size: 12px;
  font-weight: 800;
}

.next-card {
  display: grid;
  margin: 0 8px;
  padding: 15px 16px 13px;
  border-radius: 17px;
  background: linear-gradient(140deg, #1c5d80, #2c84b4);
  color: #fff;
  box-shadow: 0 12px 26px rgba(25, 87, 119, 0.22);
}

.next-label {
  color: rgba(255, 255, 255, 0.72);
  font-size: 9px;
  font-weight: 700;
}

.next-card strong {
  margin-top: 1px;
  font-size: 23px;
  letter-spacing: -0.03em;
}

.next-card small {
  color: rgba(255, 255, 255, 0.74);
  font-size: 9px;
}

.next-hint {
  margin-top: 9px;
  padding-top: 8px;
  border-top: 1px solid rgba(255, 255, 255, 0.17);
  color: rgba(255, 255, 255, 0.58);
  font-size: 8px;
}

.site-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
  margin: 9px 8px 0;
}

.site-tile {
  position: relative;
  display: grid;
  min-height: 71px;
  align-content: center;
  padding: 11px 11px 10px 15px;
  border: 1px solid rgba(38, 100, 132, 0.08);
  border-radius: 14px;
  background: #fff;
}

.site-tile.recommended {
  border-color: rgba(31, 110, 159, 0.3);
  background: #f2f9fd;
  box-shadow: inset 0 0 0 1px rgba(31, 110, 159, 0.05);
}

.site-dot {
  position: absolute;
  top: 13px;
  right: 12px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.site-dot.blue { background: #2f86b4; }
.site-dot.sky { background: #64b4d2; }
.site-dot.green { background: #6fbe9e; }
.site-dot.amber { background: #eeb35f; }

.site-tile b {
  color: #1c435b;
  font-size: 12px;
}

.site-tile small {
  margin-top: 1px;
  color: #8ba2b1;
  font-size: 8px;
}

.site-tile em {
  margin-top: 5px;
  color: #8ba2b1;
  font-size: 8px;
  font-style: normal;
}

.site-tile.recommended em {
  color: #2c7fa7;
  font-weight: 700;
}

.last-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 9px 8px 0;
  padding: 11px 13px;
  border-radius: 13px;
  background: #fff;
  color: #8ba2b1;
  font-size: 9px;
}

.last-row b {
  margin-left: auto;
  color: #34556a;
  font-size: 10px;
}

.last-row strong {
  padding: 3px 7px;
  border-radius: 7px;
  background: #eaf5fc;
  color: #1f6e9f;
  font-size: 10px;
}

.float-card {
  position: absolute;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 16px 34px rgba(20, 65, 92, 0.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.float-card span:not(.stat-number):not(.float-icon) {
  display: grid;
  line-height: 1.35;
}

.float-card b {
  font-size: 10px;
}

.float-card small {
  color: var(--faint);
  font-size: 8px;
}

.float-icon {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 9px;
  background: var(--mint);
  color: #287c62;
}

.float-icon svg {
  width: 15px;
  height: 15px;
}

.float-sync {
  top: 96px;
  left: 0;
}

.float-stat {
  right: -2px;
  bottom: 92px;
}

.stat-number {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 9px;
  background: #e7f2fa;
  color: var(--blue);
  font-size: 15px;
  font-weight: 800;
}

.trust-strip {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 4px 24px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.04em;
}

.section {
  padding: 100px 0;
}

.features {
  background: #fff;
}

.section-heading {
  max-width: 660px;
}

.section-heading h2,
.install-copy h2,
.privacy-grid h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.2;
}

.section-heading > p:last-child {
  max-width: 600px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 46px;
}

.feature-card {
  position: relative;
  padding: 27px 26px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, #fbfdff, #f8fbfe);
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(31, 110, 159, 0.22);
  box-shadow: 0 18px 45px rgba(20, 65, 92, 0.08);
}

.feature-number {
  position: absolute;
  top: 25px;
  right: 24px;
  color: #c6d7e2;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.feature-icon {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 14px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.icon-blue { background: #e4f1f9; color: #2579a6; }
.icon-mint { background: #e1f5ee; color: #278369; }
.icon-amber { background: #fdf1db; color: #b47a20; }
.icon-sky { background: #e8f6fb; color: #2b87aa; }
.icon-violet { background: #eeeafa; color: #6655a5; }
.icon-rose { background: #fdecef; color: #b45168; }

.feature-card h3 {
  margin: 22px 0 8px;
  font-size: 17px;
  letter-spacing: -0.02em;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.75;
}

.install {
  background:
    radial-gradient(600px 300px at 80% 40%, rgba(145, 207, 231, 0.14), transparent 70%),
    var(--page);
}

.install-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 80px;
  align-items: start;
}

.install-copy > p:not(.eyebrow) {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 15px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 24px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 750;
}

.text-link svg {
  width: 17px;
  height: 17px;
  transition: transform 0.18s ease;
}

.text-link:hover svg {
  transform: translateX(3px);
}

.steps {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: flex;
  gap: 18px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.8);
}

.step-number {
  display: grid;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  place-items: center;
  border: 1px solid rgba(31, 110, 159, 0.2);
  border-radius: 50%;
  background: #f2f9fd;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
}

.steps h3 {
  margin: 2px 0 4px;
  font-size: 15px;
}

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

.download-section {
  padding-top: 30px;
  background: linear-gradient(180deg, var(--page), #edf5fb);
}

.download-panel {
  position: relative;
  overflow: hidden;
  padding: 44px;
  border-radius: 30px;
  background:
    radial-gradient(600px 400px at 88% -20%, rgba(118, 197, 224, 0.25), transparent 62%),
    linear-gradient(135deg, #0d3b57, #165a7e 58%, #1e6f94);
  color: #fff;
  box-shadow: 0 30px 70px rgba(13, 59, 87, 0.25);
}

.download-panel::after {
  content: "";
  position: absolute;
  top: -90px;
  right: -70px;
  width: 310px;
  height: 310px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  box-shadow: 0 0 0 45px rgba(255, 255, 255, 0.035), 0 0 0 90px rgba(255, 255, 255, 0.025);
}

.download-main {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  gap: 24px;
  max-width: 760px;
}

.download-icon {
  flex: 0 0 76px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 21px;
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.18);
}

.download-kicker {
  margin: 1px 0 7px;
  color: rgba(255, 255, 255, 0.56);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.download-panel h2 {
  margin: 0;
  font-size: clamp(28px, 3.7vw, 42px);
  letter-spacing: -0.045em;
  line-height: 1.2;
}

.download-lede {
  max-width: 560px;
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 25px;
}

.button-white {
  background: #fff;
  color: var(--blue-dark);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.13);
}

.button-outline {
  border-color: rgba(255, 255, 255, 0.26);
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.button-outline:hover {
  background: rgba(255, 255, 255, 0.12);
}

.download-meta {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: 38px 0 0;
  padding: 21px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.download-meta > div {
  padding: 0 22px;
  border-left: 1px solid rgba(255, 255, 255, 0.12);
}

.download-meta > div:first-child {
  padding-left: 0;
  border-left: 0;
}

.download-meta dt {
  color: rgba(255, 255, 255, 0.5);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.download-meta dd {
  margin: 4px 0 0;
  font-size: 17px;
  font-weight: 750;
}

.download-foot {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-top: 19px;
}

.download-foot > p {
  margin: 0;
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
}

.download-foot details {
  min-width: 270px;
  color: rgba(255, 255, 255, 0.56);
  font-size: 11px;
}

.download-foot summary {
  cursor: pointer;
  list-style: none;
  text-align: right;
}

.download-foot summary::-webkit-details-marker {
  display: none;
}

.download-foot summary::after {
  content: " ↓";
}

.download-foot details[open] summary::after {
  content: " ↑";
}

.hash-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 9px;
}

.hash-row code {
  overflow: hidden;
  padding: 7px 9px;
  border-radius: 7px;
  background: rgba(0, 0, 0, 0.18);
  color: rgba(255, 255, 255, 0.77);
  font-family: Consolas, "SFMono-Regular", monospace;
  font-size: 10px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hash-row button {
  flex-shrink: 0;
  padding: 5px 9px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  background: transparent;
  color: rgba(255, 255, 255, 0.76);
  font-size: 10px;
  cursor: pointer;
}

.hash-row button:hover {
  background: rgba(255, 255, 255, 0.08);
}

.privacy-section {
  padding-bottom: 110px;
  background: #edf5fb;
}

.privacy-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 80px;
  align-items: start;
}

.privacy-copy p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.85;
}

.privacy-copy p:first-child {
  margin-top: 3px;
  color: var(--ink-soft);
  font-size: 16px;
}

.privacy-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 24px;
}

.privacy-links a {
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(31, 110, 159, 0.3);
  color: var(--blue-deep);
  font-size: 13px;
  font-weight: 700;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 30px;
  min-height: 92px;
  color: var(--faint);
  font-size: 12px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-soft);
  font-weight: 700;
}

.footer-inner > p {
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 18px;
  margin-left: auto;
}

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

/* 隐私政策 / 用户协议 */
.doc-page {
  background: #fff;
}

.doc-main {
  padding: 68px 0 100px;
}

.doc-wrap {
  width: min(760px, calc(100% - 48px));
  margin: 0 auto;
}

.doc-back {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
}

.doc-back svg {
  width: 16px;
  height: 16px;
}

.doc-main h1 {
  margin: 28px 0 8px;
  font-size: clamp(30px, 4vw, 42px);
  letter-spacing: -0.04em;
}

.doc-updated {
  margin: 0 0 38px;
  color: var(--faint);
  font-size: 12px;
}

.doc-main h2 {
  margin: 38px 0 12px;
  font-size: 19px;
  letter-spacing: -0.02em;
}

.doc-main p,
.doc-main li {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.9;
}

.doc-main ul {
  padding-left: 21px;
}

.doc-main li {
  margin: 6px 0;
}

.doc-note {
  margin: 30px 0;
  padding: 18px 20px;
  border: 1px solid rgba(31, 110, 159, 0.14);
  border-radius: 14px;
  background: #f3f9fd;
}

.doc-note p {
  margin: 0;
}

.doc-footer {
  margin-top: 52px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 12px;
}

@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 8px;
    padding-top: 24px;
  }

  .hero-copy {
    max-width: 680px;
  }

  .hero-visual {
    min-height: 520px;
    margin-top: 6px;
  }

  .float-sync {
    left: 6%;
  }

  .float-stat {
    right: 7%;
  }

  .install-grid,
  .privacy-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .download-main {
    max-width: none;
  }
}

@media (max-width: 720px) {
  .shell {
    width: calc(100% - 32px);
  }

  .site-nav {
    display: none;
  }

  .header-download {
    margin-left: auto;
  }

  .header-inner {
    min-height: 66px;
  }

  .hero {
    padding-top: 46px;
  }

  .hero h1 {
    font-size: clamp(36px, 10.5vw, 52px);
  }

  .lede {
    font-size: 15.5px;
  }

  .hero-visual {
    min-height: 490px;
    margin-top: 10px;
  }

  .phone {
    width: min(300px, 84vw);
  }

  .float-card {
    display: none;
  }

  .trust-strip {
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 8px 19px;
    padding-top: 16px;
  }

  .section {
    padding: 72px 0;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    margin-top: 30px;
  }

  .feature-card {
    padding: 23px 22px 24px;
  }

  .download-panel {
    padding: 29px 22px 26px;
    border-radius: 24px;
  }

  .download-main {
    display: block;
  }

  .download-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 17px;
    border-radius: 17px;
  }

  .download-panel h2 {
    font-size: 30px;
  }

  .download-actions .button {
    width: 100%;
  }

  .download-meta {
    grid-template-columns: 1fr 1fr;
    gap: 17px 0;
    padding: 19px 0;
  }

  .download-meta > div {
    padding: 0 16px;
  }

  .download-meta > div:nth-child(odd) {
    padding-left: 0;
    border-left: 0;
  }

  .download-foot {
    display: block;
  }

  .download-foot details {
    min-width: 0;
    margin-top: 16px;
  }

  .download-foot summary {
    text-align: left;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 9px;
    padding: 23px 0;
  }

  .footer-links {
    margin-left: 0;
  }

  .doc-main {
    padding: 42px 0 70px;
  }

  .doc-wrap {
    width: calc(100% - 32px);
  }
}

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

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