:root {
  color-scheme: light;
  --ink: #101719;
  --ink-soft: #4f5960;
  --muted: #69737c;
  --paper: #f3f4f6;
  --surface: #ffffff;
  --blue: #d7ecfa;
  --blue-strong: #bfe3f7;
  --yellow: #ffe24a;
  --line: #e1e5e8;
  --dark-surface: #141b1d;
  --radius-md: 22px;
  --radius-lg: 34px;
  --shadow-soft: 0 18px 55px rgba(16, 23, 25, 0.09);
  --shadow-phone: 0 28px 70px rgba(16, 23, 25, 0.24);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, summary:focus-visible, [tabindex]:focus-visible {
  outline: 3px solid #126b98;
  outline-offset: 4px;
}
svg {
  display: block;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--ink);
  color: #fff;
  transform: translateY(-180%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 20;
  top: 14px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 72px;
  margin-top: 14px;
  padding: 10px 12px 10px 18px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 12px 30px rgba(16, 23, 25, 0.07);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  justify-self: start;
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}
.brand img { border-radius: 13px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
  color: var(--ink-soft);
  font-size: 0.94rem;
  font-weight: 650;
}
.nav-links a, .site-footer a { transition: color 180ms ease; }
.nav-links a:hover, .site-footer a:hover { color: #006b96; }
.header-download {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  justify-self: end;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-size: 0.92rem;
  font-weight: 750;
  transition: background 180ms ease, color 180ms ease;
}
.header-download:hover { background: var(--yellow); color: var(--ink); }
.header-download svg { width: 18px; height: 18px; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.86fr);
  gap: clamp(44px, 7vw, 90px);
  align-items: center;
  min-height: 790px;
  padding-block: 72px 64px;
}
.hero-copy { max-width: 650px; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  color: #33515f;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.eyebrow > span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--yellow);
  box-shadow: 0 0 0 5px rgba(255, 226, 74, 0.25);
}
h1, h2, h3, p { text-wrap: pretty; }
h1, h2, h3 { margin-top: 0; line-height: 1.08; letter-spacing: -0.055em; }
h1 {
  max-width: 680px;
  margin-bottom: 28px;
  font-size: clamp(3.2rem, 6vw, 5.8rem);
  font-weight: 850;
}
h2 {
  margin-bottom: 22px;
  font-size: clamp(2.35rem, 4.8vw, 4.3rem);
  font-weight: 830;
}
h3 {
  margin-bottom: 16px;
  font-size: clamp(1.55rem, 2.7vw, 2.35rem);
  font-weight: 800;
}
.hero-lede {
  max-width: 610px;
  margin: 0 0 34px;
  color: var(--ink-soft);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  min-height: 56px;
  padding: 0 23px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  line-height: 1.2;
  cursor: pointer;
  transition: background 180ms ease, border-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}
.button svg { width: 21px; height: 21px; }
.button-primary {
  background: var(--yellow);
  color: var(--ink);
  box-shadow: 0 8px 24px rgba(166, 134, 0, 0.18);
}
.button-primary:hover { background: #ffdc1b; box-shadow: 0 11px 30px rgba(166, 134, 0, 0.24); }
.button-secondary { border-color: #cfd5d9; background: var(--surface); color: var(--ink); }
.button-secondary:hover { border-color: var(--ink); }
.release-meta {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 0.83rem;
  font-weight: 650;
}
.trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
  margin: 34px 0 0;
  padding: 0;
  color: var(--ink-soft);
  list-style: none;
  font-size: 0.9rem;
  font-weight: 700;
}
.trust-list li { display: flex; align-items: center; gap: 8px; }
.trust-list svg {
  width: 18px;
  height: 18px;
  padding: 3px;
  border-radius: 50%;
  background: var(--blue);
  color: #174d66;
  stroke-width: 2.4;
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 680px;
  overflow: hidden;
  border-radius: 46px;
  background: var(--blue);
}
.hero-visual::before, .hero-visual::after {
  position: absolute;
  width: 190px;
  height: 190px;
  border: 1px solid rgba(16, 23, 25, 0.12);
  border-radius: 50%;
  content: "";
}
.hero-visual::before { top: -85px; right: -48px; }
.hero-visual::after { bottom: -105px; left: -42px; }
.phone-frame {
  position: relative;
  z-index: 2;
  width: min(292px, 68%);
  padding: 8px;
  border: 2px solid rgba(255, 255, 255, 0.62);
  border-radius: 42px;
  background: var(--ink);
  box-shadow: var(--shadow-phone);
}
.phone-frame img { width: 100%; border-radius: 34px; }
.phone-speaker {
  position: absolute;
  z-index: 4;
  top: 16px;
  left: 50%;
  width: 52px;
  height: 5px;
  border-radius: 999px;
  background: rgba(16, 23, 25, 0.66);
  transform: translateX(-50%);
}
.visual-note {
  position: absolute;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 184px;
  padding: 12px 14px;
  border: 1px solid #dfe5e7;
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}
.visual-note-top { top: 58px; left: 22px; }
.visual-note-bottom { right: 22px; bottom: 58px; }
.visual-note span:last-child { display: grid; }
.visual-note strong { font-size: 0.84rem; line-height: 1.25; }
.visual-note small { color: var(--muted); font-size: 0.7rem; }
.note-icon {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 11px;
  background: var(--yellow);
}
.note-icon svg { width: 19px; height: 19px; }
.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #dc443a;
  box-shadow: 0 0 0 6px #fde7e5;
}

.assurance {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--line);
}
.assurance > div {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 106px;
  padding: 22px 24px;
  background: var(--surface);
}
.assurance svg { flex: 0 0 auto; width: 26px; height: 26px; color: #20586f; }
.assurance span { display: grid; }
.assurance strong { font-size: 0.95rem; }
.assurance small { color: var(--muted); font-size: 0.77rem; line-height: 1.45; }

.section { padding-block: clamp(92px, 12vw, 150px); scroll-margin-top: 100px; }
.section-heading { max-width: 760px; margin-bottom: 55px; }
.section-heading > p:last-child, .section-heading-row > p {
  max-width: 570px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.06rem;
}
.section-heading-row {
  display: flex;
  max-width: none;
  align-items: end;
  justify-content: space-between;
  gap: 48px;
}
.section-heading-row > div { max-width: 720px; }
.section-heading-row h2 { margin-bottom: 0; }
.section-heading-row > p { max-width: 370px; padding-bottom: 8px; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.feature-card {
  min-height: 420px;
  padding: clamp(28px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
}
.feature-card-wide {
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: minmax(0, 0.9fr) minmax(340px, 1.1fr);
  gap: 45px;
  align-items: end;
}
.feature-card-blue { border-color: transparent; background: var(--blue); }
.feature-card-dark { border-color: var(--dark-surface); background: var(--dark-surface); color: #f7f9f8; }
.feature-card p:last-child { max-width: 590px; margin-bottom: 0; color: var(--ink-soft); }
.feature-card-dark p:last-child, .feature-card-dark .card-kicker { color: #bfc8cb; }
.feature-icon {
  display: grid;
  width: 58px;
  height: 58px;
  margin-bottom: 36px;
  place-items: center;
  border-radius: 18px;
  background: var(--surface);
  color: #174d66;
}
.feature-icon svg { width: 27px; height: 27px; }
.feature-icon-yellow { background: var(--yellow); color: var(--ink); }
.feature-icon-dark { background: #273034; color: var(--yellow); }
.card-kicker {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.reminder-demo {
  padding: 24px;
  border: 1px solid rgba(16, 23, 25, 0.08);
  border-radius: 26px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 18px 40px rgba(25, 77, 102, 0.08);
}
.reminder-top {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 13px;
  align-items: center;
}
.reminder-top > span {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 13px;
  background: var(--blue-strong);
  font-weight: 850;
}
.reminder-top em {
  padding: 6px 10px;
  border-radius: 999px;
  background: #fde8e5;
  color: #8c2f2a;
  font-size: 0.75rem;
  font-style: normal;
  font-weight: 800;
}
.reminder-date { display: grid; margin: 30px 0 24px; }
.reminder-date small { color: var(--muted); }
.reminder-date strong { font-size: clamp(2rem, 3.8vw, 3.3rem); letter-spacing: -0.06em; }
.reminder-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.reminder-chips span {
  padding: 7px 11px;
  border: 1px solid #d8dfe3;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
}
.reminder-chips .active { border-color: var(--ink); background: var(--ink); color: #fff; }

.showcase-section { overflow: hidden; background: var(--surface); }
.screens-track {
  display: grid;
  grid-auto-columns: minmax(245px, 292px);
  grid-auto-flow: column;
  gap: 20px;
  overflow-x: auto;
  padding: 6px 2px 28px;
  scroll-snap-type: x mandatory;
  scrollbar-color: var(--ink) #e8ebed;
  scrollbar-width: thin;
}
.screens-track::-webkit-scrollbar { height: 8px; }
.screens-track::-webkit-scrollbar-track { border-radius: 999px; background: #e8ebed; }
.screens-track::-webkit-scrollbar-thumb { border-radius: 999px; background: var(--ink); }
.screen-card { min-width: 0; margin: 0; scroll-snap-align: start; }
.screen-frame {
  overflow: hidden;
  padding: 6px;
  border: 1px solid #d9dee1;
  border-radius: 35px;
  background: var(--ink);
  box-shadow: 0 16px 38px rgba(16, 23, 25, 0.12);
}
.screen-frame img { width: 100%; border-radius: 29px; }
.screen-card figcaption { display: grid; gap: 2px; padding: 20px 6px 0; }
.screen-card figcaption strong { font-size: 1.02rem; }
.screen-card figcaption span { color: var(--muted); font-size: 0.8rem; }
.scroll-hint { margin: 12px 0 0; color: var(--muted); font-size: 0.76rem; }

.privacy-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  gap: 64px;
  align-items: end;
  padding: clamp(38px, 6vw, 76px);
  border-radius: 42px;
  background: var(--dark-surface);
  color: #f7f9f8;
}
.privacy-copy > p:last-child { max-width: 620px; margin-bottom: 0; color: #bfc8cb; }
.privacy-copy .card-kicker { color: #bfc8cb; }
.privacy-icon {
  display: grid;
  width: 66px;
  height: 66px;
  margin-bottom: 42px;
  place-items: center;
  border-radius: 21px;
  background: var(--yellow);
  color: var(--ink);
}
.privacy-icon svg { width: 30px; height: 30px; }
.privacy-list { margin: 0; padding: 0; border-top: 1px solid #354044; list-style: none; }
.privacy-list li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  padding: 24px 0;
  border-bottom: 1px solid #354044;
}
.privacy-list li > span { color: var(--yellow); font-size: 0.74rem; font-weight: 800; }
.privacy-list div { display: grid; }
.privacy-list strong { font-size: 0.98rem; }
.privacy-list small { color: #9fabad; font-size: 0.78rem; }
.privacy-footnote {
  max-width: 940px;
  margin: 20px auto 0;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
}

.install-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}
.install-steps li {
  min-height: 220px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}
.install-steps li > span {
  display: grid;
  width: 42px;
  height: 42px;
  margin-bottom: 36px;
  place-items: center;
  border-radius: 50%;
  background: var(--blue);
  font-weight: 850;
}
.install-steps strong { font-size: 1.08rem; }
.install-steps p { margin: 8px 0 0; color: var(--muted); font-size: 0.88rem; }
.download-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px 50px;
  align-items: center;
  padding: clamp(30px, 5vw, 54px);
  border-radius: var(--radius-lg);
  background: var(--blue);
}
.download-main { display: flex; gap: 22px; align-items: center; }
.download-main > img {
  flex: 0 0 auto;
  border-radius: 20px;
  box-shadow: 0 10px 25px rgba(16, 23, 25, 0.12);
}
.download-main h2 { max-width: 720px; margin-bottom: 12px; font-size: clamp(2rem, 4.4vw, 3.5rem); }
.download-main p:last-child { margin: 0; color: var(--ink-soft); font-size: 0.85rem; }
.download-action { display: grid; gap: 10px; justify-items: center; }
.button-large { min-width: 200px; min-height: 62px; font-size: 1rem; }
.download-action > span { color: var(--muted); font-size: 0.72rem; }
.checksum {
  grid-column: 1 / -1;
  padding-top: 24px;
  border-top: 1px solid rgba(16, 23, 25, 0.12);
}
.checksum summary {
  width: fit-content;
  color: var(--ink-soft);
  font-size: 0.8rem;
  font-weight: 750;
  cursor: pointer;
}
.checksum code {
  display: block;
  overflow-wrap: anywhere;
  margin-top: 12px;
  color: var(--ink);
  font-size: 0.76rem;
}

.faq-section { padding-top: 30px; }
.faq-list { border-top: 1px solid #cfd5d9; }
.faq-list details { border-bottom: 1px solid #cfd5d9; }
.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 88px;
  padding: 20px 4px;
  font-size: clamp(1.05rem, 2vw, 1.28rem);
  font-weight: 780;
  cursor: pointer;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary svg { flex: 0 0 auto; width: 22px; height: 22px; transition: transform 180ms ease; }
.faq-list details[open] summary svg { transform: rotate(180deg); }
.faq-list details p { max-width: 820px; margin: -4px 0 28px; color: var(--ink-soft); }

.site-footer {
  margin-top: 30px;
  padding-block: 36px;
  border-top: 1px solid var(--line);
  background: var(--surface);
}
.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 28px;
  align-items: center;
}
.footer-inner > p { margin: 0; color: var(--muted); font-size: 0.78rem; }
.footer-inner nav { display: flex; gap: 24px; color: var(--ink-soft); font-size: 0.8rem; font-weight: 650; }

.not-found {
  display: flex;
  min-height: 100vh;
  max-width: 900px;
  align-items: flex-start;
  justify-content: center;
  flex-direction: column;
  padding-block: 60px;
}
.not-found > img { margin-bottom: 34px; border-radius: 20px; }
.not-found h1 { font-size: clamp(2.8rem, 8vw, 5.6rem); }
.not-found > p:not(.eyebrow) {
  max-width: 560px;
  margin: 0 0 30px;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-copy { max-width: 780px; }
  .hero-visual { min-height: 670px; }
  .phone-frame { width: 292px; }
  .assurance { grid-template-columns: 1fr; }
  .feature-card-wide, .privacy-panel { grid-template-columns: 1fr; }
  .feature-card-wide { gap: 34px; }
  .privacy-panel { gap: 46px; }
  .section-heading-row { display: block; }
  .section-heading-row > p { max-width: 610px; margin-top: 22px; }
  .install-steps { grid-template-columns: 1fr; }
  .install-steps li {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 22px;
    min-height: 0;
  }
  .install-steps li > span { margin-bottom: 0; }
  .download-panel { grid-template-columns: 1fr; }
  .download-action { justify-items: start; }
  .checksum { grid-column: auto; }
}

@media (max-width: 720px) {
  .container { width: min(100% - 28px, 1180px); }
  .site-header {
    grid-template-columns: 1fr auto;
    min-height: 64px;
    padding: 8px 9px 8px 14px;
    border-radius: 20px;
  }
  .nav-links { display: none; }
  .header-download { min-height: 44px; padding: 0 15px; font-size: 0.8rem; }
  .header-download svg { display: none; }
  .brand img { width: 38px; height: 38px; }
  .hero { gap: 42px; padding-block: 62px 44px; }
  h1 { font-size: clamp(2.75rem, 14vw, 4.25rem); }
  h2 { font-size: clamp(2.15rem, 11vw, 3.4rem); }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .hero-visual { min-height: 600px; border-radius: 34px; }
  .phone-frame { width: min(268px, 72vw); }
  .visual-note { min-width: 0; }
  .visual-note-top { top: 24px; left: 16px; }
  .visual-note-bottom { right: 16px; bottom: 24px; }
  .assurance > div { min-height: 92px; }
  .section { padding-block: 88px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card-wide { grid-column: auto; }
  .feature-card { min-height: 0; padding: 30px; border-radius: 28px; }
  .reminder-demo { padding: 20px; }
  .reminder-top em { display: none; }
  .screens-track { grid-auto-columns: minmax(236px, 78vw); }
  .privacy-panel { padding: 34px 28px; border-radius: 32px; }
  .download-panel { padding: 30px 24px; border-radius: 28px; }
  .download-main { align-items: flex-start; flex-direction: column; }
  .download-main > img { width: 64px; height: 64px; }
  .download-action, .download-action .button { width: 100%; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-inner nav { flex-wrap: wrap; }
}

@media (max-width: 430px) {
  .brand span { font-size: 0.98rem; }
  .header-download { padding-inline: 13px; }
  .hero-visual { min-height: 560px; }
  .visual-note small { display: none; }
  .visual-note-top { top: 18px; }
  .visual-note-bottom { bottom: 18px; }
  .install-steps li { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}