:root {
  color-scheme: light;
  --page: #f5f5f7;
  --card: rgba(255, 255, 255, 0.86);
  --card-solid: #ffffff;
  --text: #1d1d1f;
  --secondary: #6e6e73;
  --tertiary: #8e8e93;
  --separator: rgba(60, 60, 67, 0.16);
  --blue: #007aff;
  --green: #34c759;
  --orange: #ff9500;
  --red: #ff3b30;
  --shadow: 0 18px 55px rgba(0, 0, 0, 0.08);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --safe-bottom: env(safe-area-inset-bottom);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--page);
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 50% -120px, rgba(0, 122, 255, 0.18), transparent 360px),
    var(--page);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

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

h1 {
  margin-bottom: 14px;
  font-size: clamp(56px, 12vw, 118px);
  line-height: 0.92;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 20px;
  letter-spacing: 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 64px;
  padding: 10px max(18px, env(safe-area-inset-left)) 10px max(18px, env(safe-area-inset-left));
  background: rgba(245, 245, 247, 0.78);
  border-bottom: 1px solid rgba(60, 60, 67, 0.1);
  backdrop-filter: saturate(180%) blur(22px);
  -webkit-backdrop-filter: saturate(180%) blur(22px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 8px 22px rgba(0, 0, 0, 0.16);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 17px;
  line-height: 1.15;
}

.brand small {
  color: var(--secondary);
  font-size: 12px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--secondary);
  font-size: 14px;
  font-weight: 590;
}

.site-nav a {
  padding: 8px 11px;
  border-radius: 999px;
}

.site-nav a:hover {
  color: var(--text);
  background: rgba(118, 118, 128, 0.12);
}

.site-nav .nav-cta {
  color: #fff;
  background: var(--blue);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  background: rgba(118, 118, 128, 0.12);
  border: 0;
  border-radius: 999px;
}

.nav-toggle span {
  display: block;
  width: 17px;
  height: 2px;
  margin: 4px auto;
  background: var(--text);
  border-radius: 999px;
}

main {
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 430px);
  gap: clamp(34px, 6vw, 82px);
  align-items: center;
  min-height: calc(100vh - 64px);
  padding: clamp(48px, 8vw, 96px) clamp(18px, 5vw, 78px) 48px;
}

.hero-copy {
  max-width: 730px;
}

.eyebrow {
  margin-bottom: 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
}

.lead {
  max-width: 660px;
  margin-bottom: 24px;
  color: var(--secondary);
  font-size: clamp(18px, 2vw, 23px);
}

.mobile-quick {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  max-width: 680px;
  margin: 0 0 22px;
}

.mobile-quick a {
  display: grid;
  min-height: 92px;
  align-content: center;
  padding: 15px;
  color: #fff;
  background: var(--blue);
  border-radius: var(--radius-md);
  box-shadow: 0 16px 34px rgba(0, 122, 255, 0.2);
}

.mobile-quick a:nth-child(2) {
  background: #5856d6;
  box-shadow: 0 16px 34px rgba(88, 86, 214, 0.18);
}

.mobile-quick a:nth-child(3) {
  background: var(--green);
  box-shadow: 0 16px 34px rgba(52, 199, 89, 0.18);
}

.mobile-quick a:nth-child(4) {
  background: var(--orange);
  box-shadow: 0 16px 34px rgba(255, 149, 0, 0.18);
}

.mobile-quick strong {
  font-size: 20px;
  line-height: 1.12;
}

.mobile-quick small {
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 12px;
  font-weight: 590;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 12px 19px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 700;
}

.button.primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 16px 34px rgba(0, 122, 255, 0.22);
}

.button.secondary {
  color: var(--blue);
  background: rgba(0, 122, 255, 0.1);
}

.ios-tip {
  display: flex;
  gap: 10px;
  max-width: 680px;
  margin-bottom: 16px;
  padding: 13px 15px;
  color: #175136;
  background: rgba(52, 199, 89, 0.12);
  border-radius: var(--radius-md);
}

.ios-tip strong {
  flex: 0 0 auto;
}

.ios-tip span {
  color: #33634a;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-meta a {
  padding: 8px 12px;
  color: var(--secondary);
  font-size: 13px;
  font-weight: 590;
  background: rgba(118, 118, 128, 0.1);
  border-radius: 999px;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.phone-shell {
  width: min(100%, 390px);
  padding: 12px;
  background: #1c1c1e;
  border-radius: 46px;
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.22);
}

.phone-status {
  display: flex;
  justify-content: space-between;
  padding: 8px 22px 12px;
  color: #f5f5f7;
  font-size: 13px;
  font-weight: 700;
}

.app-screen {
  min-height: 565px;
  padding: 18px;
  background: #f2f2f7;
  border-radius: 34px;
}

.app-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}

.app-top strong,
.app-kicker {
  display: block;
}

.app-top strong {
  font-size: 23px;
  line-height: 1.16;
}

.app-kicker {
  color: var(--secondary);
  font-size: 11px;
  font-weight: 700;
}

.status-pill {
  padding: 5px 9px;
  color: #0b7a32;
  font-size: 12px;
  font-weight: 700;
  background: rgba(52, 199, 89, 0.16);
  border-radius: 999px;
}

.profile-strip,
.search-line,
.app-row,
.feature-card,
.steps li,
.copy-box,
details {
  background: var(--card-solid);
  border: 1px solid rgba(60, 60, 67, 0.08);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
}

.profile-strip {
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
  padding: 12px;
  border-radius: 20px;
}

.profile-strip img {
  width: 62px;
  height: 62px;
  object-fit: cover;
  border-radius: 16px;
}

.profile-strip strong,
.profile-strip small {
  display: block;
}

.profile-strip strong {
  font-size: 21px;
  line-height: 1.18;
}

.profile-strip small {
  color: var(--secondary);
  font-size: 12px;
}

.search-line {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 13px;
  color: var(--tertiary);
  border-radius: 14px;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 9px;
  margin: 14px 0;
}

.quick-grid span {
  display: grid;
  min-height: 62px;
  place-items: center;
  color: var(--blue);
  font-size: 13px;
  font-weight: 700;
  background: rgba(0, 122, 255, 0.1);
  border-radius: 16px;
}

.quick-grid span:nth-child(2) {
  color: #5856d6;
  background: rgba(88, 86, 214, 0.1);
}

.quick-grid span:nth-child(3) {
  color: #c36b00;
  background: rgba(255, 149, 0, 0.13);
}

.app-list {
  display: grid;
  gap: 10px;
}

.app-row {
  display: grid;
  grid-template-columns: 46px 1fr auto;
  gap: 11px;
  align-items: center;
  padding: 11px;
  border-radius: 18px;
}

.app-row i {
  width: 46px;
  height: 46px;
  background: linear-gradient(160deg, var(--blue), #68b7ff);
  border-radius: 13px;
}

.app-row:nth-child(2) i {
  background: linear-gradient(160deg, var(--green), #8ee6a8);
}

.app-row:nth-child(3) i {
  background: linear-gradient(160deg, #5856d6, #aaa8ff);
}

.app-row strong,
.app-row small {
  display: block;
}

.app-row small {
  color: var(--secondary);
  font-size: 12px;
}

.app-row span {
  color: var(--blue);
  font-size: 12px;
  font-weight: 700;
}

.features,
.guide,
.faq {
  padding: clamp(56px, 8vw, 98px) clamp(18px, 5vw, 78px);
}

.section-heading,
.guide-copy {
  max-width: 760px;
}

.section-heading {
  margin-bottom: 24px;
}

.section-heading h2,
.guide-copy h2 {
  max-width: 720px;
}

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

.feature-card {
  border-radius: var(--radius-lg);
}

.feature-card p,
.guide-copy p,
.steps p,
details p {
  color: var(--secondary);
}

.features,
.faq {
  background: rgba(255, 255, 255, 0.42);
}

.feature-card {
  min-height: 220px;
  padding: 22px;
}

.feature-card p {
  margin-bottom: 0;
}

.number {
  display: inline-flex;
  margin-bottom: 28px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}

.guide {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(320px, 1.08fr);
  gap: clamp(28px, 5vw, 68px);
  align-items: start;
}

.copy-box {
  display: block;
  width: min(100%, 440px);
  margin-top: 18px;
  padding: 16px;
  text-align: left;
  border-radius: var(--radius-md);
  cursor: pointer;
}

.copy-box span,
.copy-box strong,
.copy-box small {
  display: block;
}

.copy-box span {
  color: var(--secondary);
  font-size: 13px;
  font-weight: 700;
}

.copy-box strong {
  margin: 4px 0;
  overflow-wrap: anywhere;
  font-size: 18px;
}

.copy-box small {
  color: var(--blue);
  font-weight: 700;
}

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

.steps li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  padding: 17px;
  border-radius: var(--radius-lg);
}

.steps li > span {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #fff;
  font-weight: 800;
  background: var(--blue);
  border-radius: 13px;
}

.steps strong {
  display: block;
  margin-bottom: 4px;
  font-size: 18px;
}

.steps p {
  margin-bottom: 0;
}

.notice {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 18px;
  align-items: center;
  margin: 0 clamp(18px, 5vw, 78px);
  padding: 20px;
  color: #7a3d00;
  background: rgba(255, 149, 0, 0.12);
  border-radius: var(--radius-lg);
}

.notice strong {
  font-size: 20px;
}

.notice p {
  margin-bottom: 0;
}

.faq-list {
  display: grid;
  gap: 10px;
  max-width: 920px;
}

details {
  border-radius: var(--radius-md);
  overflow: hidden;
}

summary {
  min-height: 58px;
  padding: 16px 18px;
  font-weight: 700;
  cursor: pointer;
}

details p {
  margin: 0;
  padding: 0 18px 18px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 22px;
  padding: 28px 18px;
  color: var(--secondary);
  font-size: 14px;
}

.site-footer strong {
  color: var(--text);
}

.mobile-bottom-bar {
  display: none;
}

@media (max-width: 980px) {
  .hero,
  .guide {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    justify-content: flex-start;
  }

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

@media (max-width: 720px) {
  body {
    padding-bottom: calc(76px + var(--safe-bottom));
    background: var(--page);
  }

  .site-header {
    min-height: 58px;
    padding: 8px 14px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 10px;
  }

  .brand small {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 62px;
    right: 12px;
    left: 12px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 8px;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(60, 60, 67, 0.1);
    border-radius: 20px;
    box-shadow: var(--shadow);
    backdrop-filter: saturate(180%) blur(22px);
    -webkit-backdrop-filter: saturate(180%) blur(22px);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    min-height: 44px;
    text-align: center;
  }

  .hero {
    display: block;
    padding: 32px 16px 30px;
  }

  h1 {
    margin-bottom: 10px;
    font-size: clamp(56px, 19vw, 78px);
  }

  h2 {
    font-size: 29px;
  }

  .lead {
    margin-bottom: 18px;
    font-size: 18px;
  }

  .mobile-quick {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 16px;
  }

  .mobile-quick a {
    min-height: 88px;
    padding: 14px;
    border-radius: 20px;
  }

  .mobile-quick strong {
    font-size: 20px;
  }

  .hero-actions {
    display: none;
  }

  .ios-tip {
    display: block;
    margin-bottom: 0;
    padding: 14px;
    font-size: 14px;
    border-radius: 18px;
  }

  .ios-tip strong {
    display: block;
    margin-bottom: 4px;
  }

  .hero-meta,
  .hero-visual {
    display: none;
  }

  .features,
  .guide,
  .faq {
    padding: 42px 16px;
  }

  .section-heading {
    margin-bottom: 18px;
  }

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

  .feature-card {
    min-height: auto;
    padding: 18px;
    border-radius: 18px;
  }

  .number {
    margin-bottom: 12px;
  }

  .guide {
    display: block;
  }

  .copy-box {
    width: 100%;
    border-radius: 18px;
  }

  .steps {
    margin-top: 18px;
  }

  .steps li {
    border-radius: 18px;
  }

  .notice {
    grid-template-columns: 1fr;
    margin: 0 16px;
    padding: 18px;
    border-radius: 20px;
  }

  summary {
    min-height: 56px;
  }

  .button {
    width: 100%;
  }

  .site-footer {
    padding-bottom: 26px;
  }

  .mobile-bottom-bar {
    position: fixed;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 80;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    padding: 10px 12px calc(10px + var(--safe-bottom));
    background: rgba(245, 245, 247, 0.82);
    border-top: 1px solid rgba(60, 60, 67, 0.12);
    backdrop-filter: saturate(180%) blur(22px);
    -webkit-backdrop-filter: saturate(180%) blur(22px);
  }

  .mobile-bottom-bar a {
    display: grid;
    min-height: 46px;
    place-items: center;
    color: #fff;
    font-weight: 700;
    background: var(--blue);
    border-radius: 999px;
  }

  .mobile-bottom-bar a:nth-child(2) {
    background: #5856d6;
  }

  .mobile-bottom-bar a:nth-child(3) {
    background: var(--green);
  }
}

@media (max-width: 390px) {
  .mobile-quick {
    gap: 8px;
  }

  .mobile-quick a {
    min-height: 82px;
  }

  .mobile-quick strong {
    font-size: 19px;
  }

  .steps li {
    grid-template-columns: 38px 1fr;
    gap: 12px;
  }

  .steps li > span {
    width: 38px;
    height: 38px;
  }
}