:root {
  --navy-950: #031435;
  --navy-900: #05245a;
  --navy-800: #083778;
  --blue-700: #0b5bd3;
  --blue-600: #1476ee;
  --blue-500: #2c96ff;
  --cyan-400: #37d8ff;
  --cyan-300: #79e7ff;
  --ice-100: #e9f5ff;
  --ice-50: #f6fbff;
  --gold-500: #f0b743;
  --gold-300: #ffd879;
  --ink: #0b1d3c;
  --muted: #61718d;
  --line: rgba(22, 93, 187, 0.13);
  --card: rgba(255, 255, 255, 0.82);
  --shadow-lg: 0 36px 90px rgba(10, 57, 131, 0.16);
  --shadow-md: 0 18px 50px rgba(13, 72, 156, 0.13);
  --radius-xl: 36px;
  --radius-lg: 26px;
  --radius-md: 18px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: #f3f8ff;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 5%, rgba(47, 170, 255, 0.12), transparent 26%),
    radial-gradient(circle at 90% 18%, rgba(74, 86, 232, 0.09), transparent 30%),
    linear-gradient(180deg, #f8fcff 0%, #eef6ff 52%, #f9fcff 100%);
  font-family:
    "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system,
    BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  pointer-events: none;
  background-image:
    linear-gradient(rgba(28, 94, 176, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 94, 176, 0.025) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
}

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

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

button {
  font: inherit;
}

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 16px;
  border-radius: 12px;
  color: white;
  background: var(--navy-900);
  transform: translateY(-150%);
  transition: transform 160ms ease;
}

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

.site-shell {
  width: min(1480px, 100%);
  margin: 0 auto;
  padding: 0 28px 28px;
}

.site-header {
  position: relative;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 88px;
  padding: 14px 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  border-radius: 16px;
}

.brand-mark {
  position: relative;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  overflow: hidden;
  border: 1px solid rgba(83, 218, 255, 0.9);
  border-radius: 16px;
  background:
    radial-gradient(circle at 35% 24%, #6cecff, transparent 28%),
    linear-gradient(145deg, #138cf3 0%, #06368a 65%, #031944 100%);
  box-shadow:
    0 10px 24px rgba(20, 116, 230, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
}

.brand-mark::before {
  position: absolute;
  width: 36px;
  height: 36px;
  border: 2px solid rgba(255, 255, 255, 0.74);
  border-top-color: transparent;
  border-radius: 50%;
  content: "";
  transform: rotate(-28deg);
}

.brand-mark::after {
  position: absolute;
  right: 7px;
  bottom: 9px;
  width: 26px;
  height: 7px;
  border-radius: 99px 0 99px 0;
  content: "";
  background: linear-gradient(90deg, #fff, #54dcff);
  transform: rotate(-22deg);
}

.brand-building {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 25px;
}

.brand-building i {
  display: block;
  width: 5px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 2px 2px 0 0;
  background: linear-gradient(to top, #d8f8ff, #ffffff);
  box-shadow: 0 0 9px rgba(124, 235, 255, 0.7);
}

.brand-building i:nth-child(1) {
  height: 15px;
}

.brand-building i:nth-child(2) {
  height: 25px;
}

.brand-building i:nth-child(3) {
  height: 19px;
}

.brand-copy {
  display: grid;
  gap: 1px;
}

.brand-copy strong {
  color: var(--navy-900);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.brand-copy small {
  color: #7690b6;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.19em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #516783;
  font-size: 14px;
  font-weight: 650;
}

.header-actions a {
  padding: 11px 16px;
  border-radius: 14px;
  transition:
    color 180ms ease,
    background 180ms ease,
    transform 180ms ease;
}

.header-actions a:hover {
  color: var(--blue-700);
  background: rgba(218, 237, 255, 0.65);
  transform: translateY(-1px);
}

.header-actions .header-site-link {
  color: white;
  background: linear-gradient(135deg, var(--blue-700), #1e8ff4);
  box-shadow: 0 10px 24px rgba(15, 102, 219, 0.2);
}

.header-actions .header-site-link:hover {
  color: white;
  background: linear-gradient(135deg, #0751bd, #147fea);
}

.hero {
  position: relative;
  display: grid;
  min-height: 750px;
  grid-template-columns: minmax(0, 1.04fr) minmax(390px, 0.96fr);
  align-items: center;
  gap: 42px;
  overflow: hidden;
  padding: 74px clamp(42px, 6vw, 92px);
  border: 1px solid rgba(72, 157, 235, 0.19);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(112deg, rgba(255, 255, 255, 0.96) 0%, rgba(241, 249, 255, 0.92) 51%, rgba(226, 242, 255, 0.9) 100%);
  box-shadow: var(--shadow-lg);
  isolation: isolate;
}

.hero::before {
  position: absolute;
  inset: 0;
  z-index: -3;
  content: "";
  background:
    linear-gradient(115deg, rgba(255, 255, 255, 0.5), transparent 45%),
    radial-gradient(circle at 77% 48%, rgba(38, 133, 241, 0.12), transparent 38%);
}

.hero::after {
  position: absolute;
  right: -160px;
  bottom: -250px;
  z-index: -2;
  width: 700px;
  height: 700px;
  border: 1px solid rgba(52, 143, 232, 0.16);
  border-radius: 50%;
  content: "";
  box-shadow:
    0 0 0 78px rgba(46, 145, 238, 0.025),
    0 0 0 158px rgba(46, 145, 238, 0.022);
}

.grid-surface {
  position: absolute;
  inset: 0;
  z-index: -3;
  opacity: 0.55;
  background-image:
    linear-gradient(rgba(30, 109, 200, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 109, 200, 0.045) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(90deg, transparent 2%, black 60%, transparent);
}

.hero-glow {
  position: absolute;
  z-index: -1;
  border-radius: 50%;
  filter: blur(2px);
  pointer-events: none;
}

.hero-glow-one {
  top: -230px;
  right: 8%;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(44, 194, 255, 0.19), transparent 67%);
}

.hero-glow-two {
  bottom: -230px;
  left: 17%;
  width: 440px;
  height: 440px;
  background: radial-gradient(circle, rgba(65, 99, 231, 0.1), transparent 68%);
}

.hero-copy {
  position: relative;
  z-index: 4;
  max-width: 680px;
}

.official-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 13px;
  border: 1px solid rgba(35, 133, 230, 0.16);
  border-radius: 999px;
  color: var(--blue-700);
  background: rgba(232, 246, 255, 0.82);
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.08em;
  box-shadow: inset 0 1px 0 white;
}

.official-dot {
  width: 8px;
  height: 8px;
  border: 2px solid white;
  border-radius: 50%;
  background: #24c98c;
  box-shadow: 0 0 0 4px rgba(36, 201, 140, 0.12);
}

.hero h1 {
  margin: 25px 0 18px;
  color: var(--navy-950);
  font-size: clamp(52px, 5.4vw, 78px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -0.055em;
}

.hero h1 span {
  display: block;
  margin-top: 6px;
  color: transparent;
  background: linear-gradient(96deg, #0758c8 5%, #168ee9 48%, #25c9e8 92%);
  -webkit-background-clip: text;
  background-clip: text;
  letter-spacing: 0.02em;
}

.hero-lead {
  max-width: 600px;
  margin: 0;
  color: #586b88;
  font-size: clamp(16px, 1.35vw, 19px);
  line-height: 1.9;
}

.value-points {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  padding: 0;
  margin: 25px 0 31px;
  color: #375271;
  font-size: 14px;
  font-weight: 700;
  list-style: none;
}

.value-points li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.value-points li span {
  display: grid;
  width: 20px;
  height: 20px;
  place-items: center;
  border-radius: 50%;
  color: #087bde;
  background: #ddf3ff;
  font-size: 12px;
}

.download-panel {
  max-width: 650px;
}

.download-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 13px;
}

.download-button {
  position: relative;
  display: grid;
  min-height: 88px;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 13px;
  overflow: hidden;
  padding: 16px 17px;
  border: 1px solid rgba(19, 93, 185, 0.12);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow:
    0 13px 28px rgba(15, 80, 164, 0.1),
    inset 0 1px 0 white;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
}

.download-button::before {
  position: absolute;
  inset: 0;
  z-index: 0;
  content: "";
  opacity: 0;
  background: linear-gradient(130deg, rgba(16, 104, 218, 0.06), rgba(53, 215, 250, 0.09));
  transition: opacity 180ms ease;
}

.download-button:hover {
  border-color: rgba(17, 117, 230, 0.34);
  box-shadow: 0 17px 34px rgba(15, 80, 164, 0.16);
  transform: translateY(-3px);
}

.download-button:hover::before {
  opacity: 1;
}

.download-button[aria-disabled="true"] {
  cursor: pointer;
}

.download-button.is-ready {
  color: white;
  border-color: transparent;
  background: linear-gradient(135deg, #0856c2 0%, #1389ed 66%, #21bde7 100%);
  box-shadow: 0 18px 36px rgba(12, 104, 217, 0.24);
}

.download-button.is-ready::before {
  background: linear-gradient(120deg, rgba(255, 255, 255, 0.18), transparent 42%);
}

.download-button.is-ready .button-copy small,
.download-button.is-ready .button-arrow {
  color: rgba(255, 255, 255, 0.76);
}

.download-button.is-ready .platform-icon {
  border-color: rgba(255, 255, 255, 0.28);
  color: white;
  background: rgba(255, 255, 255, 0.14);
}

.download-button.is-recommended::after {
  position: absolute;
  top: 7px;
  right: 9px;
  z-index: 2;
  padding: 3px 7px;
  border-radius: 99px;
  color: #0872d7;
  background: #dff4ff;
  content: attr(data-recommendation);
  font-size: 9px;
  font-weight: 800;
}

.platform-icon,
.button-copy,
.button-arrow {
  position: relative;
  z-index: 1;
}

.platform-icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid #d8ecff;
  border-radius: 16px;
  color: #0c69cf;
  background: linear-gradient(145deg, #eff9ff, #dcefff);
  box-shadow: inset 0 1px 0 white;
}

.platform-icon-android {
  position: relative;
}

.platform-icon-android::before {
  position: absolute;
  width: 21px;
  height: 15px;
  border-radius: 8px 8px 5px 5px;
  content: "";
  background: currentColor;
}

.platform-icon-android::after {
  position: absolute;
  top: 14px;
  width: 19px;
  height: 9px;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  content: "";
}

.platform-icon-android i::before,
.platform-icon-android i::after {
  position: absolute;
  top: 22px;
  z-index: 1;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  content: "";
  background: white;
}

.platform-icon-android i::before {
  left: 18px;
}

.platform-icon-android i::after {
  right: 18px;
}

.platform-icon-ios {
  color: transparent;
}

.platform-icon-ios::before {
  width: 21px;
  height: 24px;
  border-radius: 50% 50% 46% 46%;
  content: "";
  background: #0c69cf;
  box-shadow: 7px 1px 0 -5px white;
}

.platform-icon-ios::after {
  position: absolute;
  top: 10px;
  width: 8px;
  height: 6px;
  border-radius: 70% 10% 70% 10%;
  content: "";
  background: #0c69cf;
  transform: translateX(5px) rotate(-22deg);
}

.is-ready .platform-icon-ios::before,
.is-ready .platform-icon-ios::after {
  background: white;
}

.button-copy {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.button-copy small {
  overflow: hidden;
  color: #8391a8;
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.03em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.button-copy strong {
  color: inherit;
  font-size: 16px;
  font-weight: 850;
  letter-spacing: 0.015em;
}

.button-arrow {
  color: #84a4c8;
  font-size: 22px;
  transition: transform 180ms ease;
}

.download-button:hover .button-arrow {
  transform: translateX(3px);
}

.download-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
  color: #788aa5;
  font-size: 12px;
}

.release-state {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #226baf;
  font-weight: 750;
}

.release-state i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #28c98d;
  box-shadow: 0 0 0 4px rgba(40, 201, 141, 0.11);
}

.secure-note {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 26px 0 0;
  color: #7789a1;
  font-size: 12px;
}

.secure-icon {
  display: grid;
  width: 19px;
  height: 19px;
  place-items: center;
  border: 1px solid #a6d7f9;
  border-radius: 7px 7px 9px 9px;
  color: #137bd5;
  font-size: 11px;
  font-weight: 900;
}

.hero-visual {
  position: relative;
  display: grid;
  min-height: 620px;
  place-items: center;
}

.phone {
  position: relative;
  z-index: 3;
  width: min(345px, 74%);
  padding: 9px;
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: 48px;
  background: linear-gradient(145deg, rgba(17, 69, 139, 0.96), #041b47 76%);
  box-shadow:
    0 42px 75px rgba(4, 42, 105, 0.28),
    0 0 0 1px rgba(22, 105, 207, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
  transform: rotate(2.5deg);
}

.phone::before {
  position: absolute;
  top: 16%;
  left: -3px;
  width: 3px;
  height: 58px;
  border-radius: 4px 0 0 4px;
  content: "";
  background: #13386b;
  box-shadow: 0 74px #13386b;
}

.phone::after {
  position: absolute;
  top: 24%;
  right: -3px;
  width: 3px;
  height: 84px;
  border-radius: 0 4px 4px 0;
  content: "";
  background: #13386b;
}

.phone-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 9 / 17.3;
  border-radius: 40px;
  background: #eaf4ff;
}

.phone-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.phone-speaker {
  position: absolute;
  top: 11px;
  left: 50%;
  z-index: 3;
  width: 92px;
  height: 25px;
  border-radius: 99px;
  background: #03132d;
  transform: translateX(-50%);
  box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.12);
}

.phone-speaker::after {
  position: absolute;
  top: 8px;
  right: 13px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  content: "";
  background: radial-gradient(circle at 35% 35%, #1e6ca5, #07101f 65%);
}

.phone-home {
  position: absolute;
  bottom: 7px;
  left: 50%;
  z-index: 3;
  width: 92px;
  height: 4px;
  border-radius: 99px;
  background: rgba(3, 20, 53, 0.52);
  transform: translateX(-50%);
}

.orbit {
  position: absolute;
  z-index: 1;
  border: 1px solid rgba(32, 130, 224, 0.2);
  border-radius: 50%;
  pointer-events: none;
}

.orbit::before,
.orbit::after {
  position: absolute;
  width: 9px;
  height: 9px;
  border: 2px solid white;
  border-radius: 50%;
  content: "";
  background: #28cdf3;
  box-shadow: 0 0 18px #39c9ff;
}

.orbit-large {
  width: 510px;
  height: 510px;
  transform: rotate(-15deg);
}

.orbit-large::before {
  top: 68px;
  left: 54px;
}

.orbit-large::after {
  right: 22px;
  bottom: 135px;
}

.orbit-small {
  width: 410px;
  height: 410px;
  border-style: dashed;
  opacity: 0.66;
  transform: rotate(31deg);
}

.orbit-small::before {
  top: 31px;
  right: 73px;
}

.orbit-small::after {
  bottom: 10px;
  left: 165px;
}

.floating-card {
  position: absolute;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 174px;
  padding: 13px 16px;
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: 18px;
  color: #153a6c;
  background: rgba(255, 255, 255, 0.79);
  box-shadow: 0 18px 42px rgba(11, 66, 141, 0.16);
  backdrop-filter: blur(16px);
}

.floating-card span:last-child {
  display: grid;
  gap: 2px;
}

.floating-card small {
  color: #7a91ad;
  font-size: 10px;
}

.floating-card strong {
  font-size: 13px;
  font-weight: 850;
}

.floating-card-top {
  top: 17%;
  right: 0;
}

.floating-card-bottom {
  bottom: 17%;
  left: 1%;
}

.floating-icon {
  display: grid;
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 12px;
  color: #0879d7;
  background: linear-gradient(145deg, #e8f8ff, #ccecff);
  font-size: 17px;
  font-weight: 900;
}

.shield-icon {
  border-radius: 10px 10px 13px 13px;
}

.pulse-icon {
  position: relative;
}

.pulse-icon::before {
  width: 16px;
  height: 16px;
  border: 2px solid #0e81df;
  border-radius: 50%;
  content: "";
  box-shadow:
    0 0 0 5px rgba(14, 129, 223, 0.1),
    0 0 0 10px rgba(14, 129, 223, 0.05);
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 24px 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.76);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(14px);
}

.trust-strip article {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 16px;
  min-height: 128px;
  padding: 25px 30px;
}

.trust-strip article + article {
  border-left: 1px solid var(--line);
}

.trust-number {
  color: #cae3fb;
  font-size: 34px;
  font-weight: 900;
  letter-spacing: -0.05em;
}

.trust-strip strong {
  color: var(--navy-900);
  font-size: 16px;
}

.trust-strip p {
  margin: 7px 0 0;
  color: #7d8ba0;
  font-size: 12px;
  line-height: 1.65;
}

.guide-section {
  padding: 94px clamp(18px, 6vw, 88px) 72px;
  border: 1px solid rgba(33, 113, 206, 0.1);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 80% 0%, rgba(64, 172, 250, 0.1), transparent 28%),
    rgba(255, 255, 255, 0.7);
  box-shadow: 0 28px 68px rgba(10, 56, 124, 0.08);
}

.section-heading {
  max-width: 690px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-heading > span,
.eyebrow {
  color: var(--blue-600);
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.2em;
}

.section-heading h2 {
  margin: 14px 0 12px;
  color: var(--navy-950);
  font-size: clamp(30px, 3vw, 44px);
  line-height: 1.24;
}

.section-heading p {
  margin: 0;
  color: #72819a;
  font-size: 15px;
  line-height: 1.85;
}

.guide-layout {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 22px;
  max-width: 1100px;
  margin: 0 auto;
}

.qr-card,
.step-card {
  border: 1px solid rgba(21, 101, 194, 0.12);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 16px 38px rgba(11, 67, 144, 0.08);
}

.qr-card {
  position: relative;
  display: grid;
  align-content: start;
  justify-items: center;
  overflow: hidden;
  padding: 27px;
  border-radius: 28px;
}

.qr-card::after {
  position: absolute;
  top: -62px;
  right: -62px;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  content: "";
  background: radial-gradient(circle, rgba(46, 170, 247, 0.15), transparent 68%);
}

.qr-card-head {
  display: flex;
  width: 100%;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 22px;
}

.qr-card-head h3 {
  margin: 7px 0 0;
  color: var(--navy-900);
  font-size: 18px;
}

.scan-corner {
  position: relative;
  width: 28px;
  height: 28px;
  border-top: 3px solid #1b8de8;
  border-right: 3px solid #1b8de8;
  border-radius: 0 8px 0 0;
}

.scan-corner::after {
  position: absolute;
  right: -3px;
  bottom: -18px;
  width: 3px;
  height: 13px;
  border-radius: 99px;
  content: "";
  background: #1b8de8;
}

.qr-wrap {
  display: grid;
  width: 220px;
  height: 220px;
  place-items: center;
  padding: 15px;
  border: 1px solid #dbeeff;
  border-radius: 24px;
  background: white;
  box-shadow:
    0 13px 30px rgba(18, 102, 193, 0.1),
    inset 0 0 0 5px #f3f9ff;
}

#downloadQr {
  width: 188px;
  height: 188px;
  border-radius: 7px;
}

.qr-fallback {
  display: grid;
  place-items: center;
  text-align: center;
}

.qr-fallback span {
  display: grid;
  width: 78px;
  height: 78px;
  place-items: center;
  border-radius: 22px;
  color: white;
  background: linear-gradient(145deg, #0a62cf, #26aeee);
  font-size: 22px;
  font-weight: 850;
}

.qr-fallback small {
  margin-top: 10px;
  color: #8494aa;
}

.copy-link-button {
  width: 220px;
  margin-top: 18px;
  padding: 12px 16px;
  border: 1px solid #cce4fb;
  border-radius: 14px;
  color: #176fc0;
  background: #f2f9ff;
  cursor: pointer;
  font-size: 13px;
  font-weight: 750;
  transition:
    color 180ms ease,
    background 180ms ease,
    transform 180ms ease;
}

.copy-link-button:hover {
  color: white;
  background: #147fe0;
  transform: translateY(-2px);
}

.step-list {
  display: grid;
  gap: 14px;
}

.step-card {
  display: grid;
  min-height: 132px;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 25px 28px;
  border-radius: 24px;
  transition:
    border-color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease;
}

.step-card:hover {
  border-color: rgba(20, 118, 224, 0.26);
  box-shadow: 0 20px 42px rgba(11, 67, 144, 0.12);
  transform: translateX(4px);
}

.step-index {
  display: grid;
  width: 56px;
  height: 56px;
  place-items: center;
  border: 1px solid #d8ebfe;
  border-radius: 18px;
  color: #1b7ad2;
  background: linear-gradient(145deg, #edf8ff, #dfedff);
  font-size: 17px;
  font-weight: 900;
}

.step-card h3 {
  margin: 0 0 8px;
  color: var(--navy-900);
  font-size: 17px;
}

.step-card p {
  margin: 0;
  color: #78879e;
  font-size: 13px;
  line-height: 1.75;
}

.system-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  max-width: 1100px;
  margin: 22px auto 0;
}

.system-notes article {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 18px;
  border: 1px solid rgba(35, 110, 197, 0.1);
  border-radius: 17px;
  background: rgba(244, 249, 255, 0.86);
}

.system-notes p {
  margin: 0;
  color: #667995;
  font-size: 12px;
}

.note-label {
  flex: 0 0 auto;
  padding: 6px 9px;
  border-radius: 8px;
  font-size: 10px;
  font-weight: 850;
}

.android-label {
  color: #0a8d68;
  background: #dff8ee;
}

.ios-label {
  color: #43618a;
  background: #e7eef8;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 48px 24px calc(24px + env(safe-area-inset-bottom));
  color: #6d7f99;
}

.site-footer > p {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 20px;
  border-top: 1px solid rgba(28, 96, 182, 0.1);
  font-size: 11px;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand > span:last-child {
  display: grid;
  gap: 3px;
}

.footer-brand strong {
  color: var(--navy-900);
  font-size: 16px;
  letter-spacing: 0.08em;
}

.footer-brand small {
  font-size: 10px;
  letter-spacing: 0.08em;
}

.footer-mark {
  display: flex;
  width: 38px;
  height: 38px;
  align-items: flex-end;
  justify-content: center;
  gap: 2px;
  padding-bottom: 8px;
  border-radius: 13px;
  background: linear-gradient(145deg, #158cf1, #063d9b);
}

.footer-mark i {
  width: 4px;
  border-radius: 2px 2px 0 0;
  background: white;
}

.footer-mark i:nth-child(1) {
  height: 10px;
}

.footer-mark i:nth-child(2) {
  height: 19px;
}

.footer-mark i:nth-child(3) {
  height: 14px;
}

.footer-links {
  display: flex;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
}

.footer-links a {
  padding: 9px 12px;
  border-radius: 10px;
}

.footer-links a:hover {
  color: var(--blue-700);
  background: #e7f3ff;
}

.wechat-mask {
  position: fixed;
  inset: 0;
  z-index: 100;
  padding: max(70px, env(safe-area-inset-top)) 26px 30px;
  color: white;
  background: rgba(2, 15, 39, 0.94);
  backdrop-filter: blur(10px);
}

.wechat-mask[hidden] {
  display: none;
}

.mask-open {
  overflow: hidden;
}

.mask-close {
  position: absolute;
  top: max(18px, env(safe-area-inset-top));
  left: 20px;
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 50%;
  color: white;
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  font-size: 25px;
}

.wechat-arrow {
  position: absolute;
  top: max(14px, env(safe-area-inset-top));
  right: 24px;
  color: #59dcff;
  font-size: 56px;
  font-weight: 300;
}

.wechat-message {
  max-width: 420px;
  margin: 82px auto 0;
  text-align: center;
}

.wechat-message span {
  display: inline-flex;
  padding: 8px 13px;
  border: 1px solid rgba(84, 218, 255, 0.3);
  border-radius: 999px;
  color: #6ce8ff;
  background: rgba(50, 197, 238, 0.08);
  font-size: 12px;
}

.wechat-message h2 {
  margin: 23px 0 12px;
  font-size: 28px;
}

.wechat-message p {
  margin: 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
  line-height: 1.8;
}

.toast {
  position: fixed;
  bottom: calc(26px + env(safe-area-inset-bottom));
  left: 50%;
  z-index: 120;
  max-width: calc(100vw - 36px);
  padding: 12px 18px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 14px;
  color: white;
  background: rgba(3, 24, 60, 0.92);
  box-shadow: 0 16px 36px rgba(3, 25, 63, 0.24);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 16px);
  transition:
    opacity 180ms ease,
    transform 180ms ease;
  font-size: 13px;
  text-align: center;
  backdrop-filter: blur(12px);
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

:focus-visible {
  outline: 3px solid rgba(43, 166, 245, 0.48);
  outline-offset: 3px;
}

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(330px, 0.8fr);
    gap: 20px;
    padding-right: 42px;
    padding-left: 42px;
  }

  .download-actions {
    grid-template-columns: 1fr;
    max-width: 380px;
  }

  .hero-visual {
    min-height: 570px;
  }

  .floating-card-top {
    right: -8px;
  }

  .floating-card-bottom {
    left: -14px;
  }
}

@media (max-width: 860px) {
  .site-shell {
    padding: 0 16px 16px;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 58px 36px 30px;
  }

  .hero-copy {
    max-width: 650px;
    margin: 0 auto;
  }

  .download-actions {
    max-width: none;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-visual {
    min-height: 600px;
  }

  .phone {
    width: 315px;
  }

  .floating-card-top {
    right: 8%;
  }

  .floating-card-bottom {
    left: 8%;
  }

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

  .trust-strip article {
    min-height: auto;
  }

  .trust-strip article + article {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .guide-layout {
    grid-template-columns: 1fr;
  }

  .qr-card {
    max-width: 430px;
    margin: 0 auto;
  }
}

@media (max-width: 620px) {
  .site-shell {
    padding: 0;
  }

  .site-header {
    min-height: 76px;
    padding: 12px 18px;
  }

  .brand {
    gap: 10px;
  }

  .brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 14px;
  }

  .brand-copy strong {
    font-size: 17px;
  }

  .brand-copy small {
    font-size: 8px;
  }

  .header-actions > a:first-child {
    display: none;
  }

  .header-actions .header-site-link {
    padding: 9px 12px;
    font-size: 12px;
  }

  .hero {
    min-height: auto;
    gap: 10px;
    padding: 43px 19px 20px;
    border-right: 0;
    border-left: 0;
    border-radius: 0 0 30px 30px;
  }

  .official-pill {
    padding: 7px 11px;
    font-size: 11px;
  }

  .hero h1 {
    margin: 19px 0 14px;
    font-size: clamp(43px, 13vw, 56px);
    line-height: 1.04;
  }

  .hero-lead {
    font-size: 15px;
    line-height: 1.75;
  }

  .value-points {
    gap: 11px 16px;
    margin: 20px 0 24px;
    font-size: 12px;
  }

  .download-actions {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .download-button {
    min-height: 78px;
    padding: 13px 15px;
    border-radius: 18px;
  }

  .platform-icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
  }

  .button-copy strong {
    font-size: 15px;
  }

  .download-meta {
    flex-wrap: wrap;
    gap: 7px 11px;
  }

  .secure-note {
    margin-top: 20px;
    font-size: 11px;
  }

  .hero-visual {
    min-height: 510px;
    margin-top: 12px;
  }

  .phone {
    width: 255px;
    border-radius: 39px;
  }

  .phone-frame {
    border-radius: 32px;
  }

  .phone-speaker {
    width: 78px;
    height: 22px;
  }

  .orbit-large {
    width: 370px;
    height: 370px;
  }

  .orbit-small {
    width: 300px;
    height: 300px;
  }

  .floating-card {
    min-width: 151px;
    padding: 10px 12px;
    border-radius: 15px;
  }

  .floating-card-top {
    top: 18%;
    right: 0;
  }

  .floating-card-bottom {
    bottom: 15%;
    left: 0;
  }

  .floating-icon {
    width: 31px;
    height: 31px;
    border-radius: 10px;
  }

  .trust-strip {
    margin: 14px 14px 0;
    border-radius: 22px;
  }

  .trust-strip article {
    grid-template-columns: 52px 1fr;
    gap: 10px;
    padding: 21px 20px;
  }

  .trust-number {
    font-size: 27px;
  }

  .guide-section {
    margin-top: 14px;
    padding: 66px 16px 40px;
    border-right: 0;
    border-left: 0;
    border-radius: 30px 30px 0 0;
  }

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

  .section-heading h2 {
    font-size: 29px;
  }

  .section-heading p {
    font-size: 13px;
  }

  .qr-card {
    width: 100%;
    padding: 22px;
    border-radius: 24px;
  }

  .step-card {
    min-height: 118px;
    grid-template-columns: auto 1fr;
    gap: 16px;
    padding: 21px 18px;
    border-radius: 21px;
  }

  .step-index {
    width: 48px;
    height: 48px;
    border-radius: 15px;
    font-size: 15px;
  }

  .system-notes {
    grid-template-columns: 1fr;
  }

  .site-footer {
    grid-template-columns: 1fr;
    padding: 38px 20px calc(20px + env(safe-area-inset-bottom));
  }

  .footer-links {
    justify-self: start;
  }
}

@media (max-width: 370px) {
  .brand-copy small {
    display: none;
  }

  .header-actions .header-site-link {
    padding: 8px 10px;
  }

  .hero {
    padding-right: 15px;
    padding-left: 15px;
  }

  .value-points {
    gap: 9px 12px;
  }

  .floating-card {
    transform: scale(0.9);
  }

  .floating-card-top {
    right: -12px;
  }

  .floating-card-bottom {
    left: -12px;
  }
}

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

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