:root {
  color-scheme: light;
  --ink: #102944;
  --ink-soft: #5f6f81;
  --paper: #f6f8fc;
  --white: #ffffff;
  --blue: #128cf0;
  --blue-deep: #086ad8;
  --line: rgba(16, 41, 68, 0.1);
  --shadow: 0 28px 80px rgba(32, 61, 91, 0.14);
  --radius: 34px;
  --shell: min(1180px, calc(100vw - 48px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  overflow-x: clip;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 14%, rgba(64, 179, 255, 0.12), transparent 27rem),
    radial-gradient(circle at 92% 27%, rgba(255, 127, 203, 0.1), transparent 25rem),
    var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

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

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 16px;
  width: min(1240px, calc(100vw - 32px));
  height: 72px;
  margin: 16px auto 0;
  padding: 10px 12px 10px 16px;
  display: flex;
  align-items: center;
  gap: 28px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 12px 36px rgba(49, 71, 94, 0.08);
  backdrop-filter: blur(22px) saturate(150%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  white-space: nowrap;
}

.brand img {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  box-shadow: 0 7px 18px rgba(24, 78, 137, 0.16);
}

.brand span {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.04em;
}

.brand small {
  color: #8491a0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.site-header nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 30px;
  color: #5e6b78;
  font-size: 14px;
  font-weight: 600;
}

.site-header nav a {
  transition: color 180ms ease;
}

.site-header nav a:hover {
  color: var(--blue);
}

.nav-cta {
  padding: 14px 20px;
  border-radius: 15px;
  color: white;
  background: var(--ink);
  font-size: 14px;
  font-weight: 700;
  transition: transform 180ms ease, background 180ms ease;
}

.nav-cta:hover {
  transform: translateY(-2px);
  background: var(--blue-deep);
}

.hero {
  min-height: 790px;
  padding: 86px 0 74px;
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  align-items: center;
  gap: 64px;
}

.eyebrow {
  margin: 0 0 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #607184;
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow span {
  width: 28px;
  height: 2px;
  border-radius: 99px;
  background: var(--blue);
}

.eyebrow.light {
  color: rgba(255, 255, 255, 0.68);
}

.eyebrow.light span {
  background: #73cbff;
}

.hero h1,
.section-heading h2,
.privacy-copy h2,
.device-copy h2,
.download-inner h2 {
  margin: 0;
  font-weight: 850;
  letter-spacing: -0.065em;
  line-height: 1.08;
}

.hero h1 {
  max-width: 610px;
  font-size: clamp(54px, 5.2vw, 78px);
}

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

.hero h1 em::after {
  content: "";
  position: absolute;
  right: -6px;
  bottom: -7px;
  left: 2px;
  height: 9px;
  border-radius: 99px;
  background: linear-gradient(90deg, rgba(18, 140, 240, 0.18), rgba(122, 222, 255, 0.65));
  transform: rotate(-1deg);
}

.hero-description {
  max-width: 570px;
  margin: 30px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.85;
}

.hero-actions {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  min-height: 54px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  border-radius: 17px;
  font-size: 15px;
  font-weight: 750;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.button:hover {
  transform: translateY(-3px);
}

.button-primary {
  color: white;
  background: linear-gradient(135deg, #168ff2, #0b78e5);
  box-shadow: 0 14px 34px rgba(18, 140, 240, 0.28);
}

.button-primary span {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.18);
}

.button-ghost {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.64);
  box-shadow: 0 10px 25px rgba(30, 50, 70, 0.06);
}

.hero-facts {
  margin: 40px 0 0;
  padding: 24px 0 0;
  display: flex;
  gap: 34px;
  border-top: 1px solid var(--line);
  list-style: none;
}

.hero-facts li {
  display: grid;
  gap: 2px;
}

.hero-facts strong {
  font-size: 23px;
  letter-spacing: -0.04em;
}

.hero-facts span {
  color: #7f8b98;
  font-size: 12px;
}

.hero-visual {
  position: relative;
  min-height: 660px;
  display: grid;
  place-items: center;
}

.ambient {
  position: absolute;
  border-radius: 50%;
  filter: blur(6px);
}

.ambient-blue {
  width: 410px;
  height: 410px;
  top: 92px;
  left: 4%;
  background: rgba(61, 181, 255, 0.24);
}

.ambient-pink {
  width: 300px;
  height: 300px;
  right: 0;
  bottom: 78px;
  background: rgba(255, 137, 204, 0.2);
}

.phone-card {
  position: relative;
  z-index: 2;
  width: min(430px, 76%);
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: 45px;
  background: rgba(255, 255, 255, 0.74);
  box-shadow: 0 38px 90px rgba(31, 57, 85, 0.22);
  transform: rotate(3deg);
  backdrop-filter: blur(18px);
}

.phone-card img {
  width: 100%;
  border-radius: 35px;
}

.floating-note {
  position: absolute;
  z-index: 3;
  padding: 14px 17px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: 19px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 18px 45px rgba(31, 57, 85, 0.14);
  backdrop-filter: blur(18px);
}

.floating-note-top {
  top: 108px;
  right: -5px;
}

.floating-note-bottom {
  bottom: 118px;
  left: -8px;
}

.note-icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  color: white;
  font-weight: 900;
}

.shield {
  background: linear-gradient(145deg, #2db1ff, #087be2);
}

.sparkle {
  background: linear-gradient(145deg, #ff92ce, #ba7cf6);
}

.floating-note div {
  display: grid;
  gap: 3px;
}

.floating-note strong {
  font-size: 14px;
}

.floating-note small {
  color: #82909e;
  font-size: 11px;
}

.marquee {
  overflow: hidden;
  border-block: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.52);
}

.marquee div {
  min-width: max-content;
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 44px;
  color: #536678;
  font-size: 18px;
  font-weight: 720;
}

.marquee i {
  color: #70c9ff;
  font-style: normal;
}

.section {
  padding-block: 128px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 62px;
}

.section-heading.compact {
  max-width: 700px;
}

.section-heading h2,
.privacy-copy h2,
.device-copy h2,
.download-inner h2 {
  font-size: clamp(42px, 4.2vw, 64px);
}

.section-heading > p:last-child,
.device-copy > p:last-child {
  max-width: 650px;
  margin: 24px 0 0;
  color: var(--ink-soft);
  font-size: 17px;
  line-height: 1.8;
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px;
}

.mode-card {
  position: relative;
  min-height: 790px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.organize-card {
  background: linear-gradient(160deg, #e9f7ff 0%, #f8f5ff 48%, #fff1e7 100%);
}

.memory-card {
  background: linear-gradient(160deg, #fff2f7 0%, #f5efff 48%, #eaf8ff 100%);
}

.mode-copy {
  position: relative;
  z-index: 2;
  padding: 44px 44px 0;
}

.number {
  float: right;
  color: rgba(16, 41, 68, 0.2);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.mode-label {
  margin: 0 0 16px;
  color: var(--blue-deep);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.mode-card h3 {
  margin: 0;
  font-size: clamp(30px, 3vw, 42px);
  letter-spacing: -0.055em;
  line-height: 1.18;
}

.mode-card .mode-copy > p:not(.mode-label) {
  margin: 20px 0 0;
  color: #607081;
  line-height: 1.75;
}

.mode-card ul {
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  color: #40556a;
  font-size: 14px;
  list-style: none;
}

.mode-card li::before {
  content: "✓";
  margin-right: 9px;
  color: var(--blue);
  font-weight: 900;
}

.mode-card > img {
  position: absolute;
  width: 63%;
  right: -2%;
  bottom: -34%;
  border-radius: 26px;
  box-shadow: 0 24px 55px rgba(26, 53, 82, 0.2);
  transform: rotate(5deg);
}

.memory-card > img {
  right: auto;
  left: 6%;
  bottom: -31%;
  transform: rotate(-4deg);
}

.privacy-section {
  position: relative;
  overflow: hidden;
  color: white;
  background:
    radial-gradient(circle at 18% 36%, rgba(43, 162, 255, 0.22), transparent 22rem),
    radial-gradient(circle at 83% 74%, rgba(190, 98, 255, 0.16), transparent 24rem),
    #0b1d30;
}

.privacy-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  align-items: center;
  gap: 90px;
}

.privacy-visual {
  position: relative;
  min-height: 520px;
  display: grid;
  place-items: center;
}

.privacy-orbit {
  position: absolute;
  border: 1px solid rgba(141, 205, 255, 0.2);
  border-radius: 50%;
}

.orbit-one {
  width: 430px;
  height: 430px;
}

.orbit-two {
  width: 310px;
  height: 310px;
  border-style: dashed;
  transform: rotate(28deg);
}

.privacy-lock {
  position: relative;
  z-index: 2;
  width: 210px;
  height: 210px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  background: linear-gradient(145deg, rgba(36, 145, 235, 0.58), rgba(17, 52, 83, 0.38));
  box-shadow: 0 0 90px rgba(64, 170, 255, 0.25), inset 0 0 30px rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(20px);
}

.privacy-lock span {
  width: 58px;
  height: 58px;
  margin-bottom: 14px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  color: #bce7ff;
  background: rgba(255, 255, 255, 0.1);
  font-size: 37px;
  font-weight: 900;
}

.privacy-lock strong {
  font-size: 19px;
}

.privacy-lock small {
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.5);
}

.privacy-lead {
  max-width: 620px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.65);
  font-size: 17px;
  line-height: 1.85;
}

.privacy-points {
  margin-top: 44px;
  display: grid;
  gap: 18px;
}

.privacy-points > div {
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 18px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.045);
}

.privacy-points > div > span {
  color: #65c6ff;
  font-size: 12px;
  font-weight: 850;
}

.privacy-points p {
  margin: 0;
  display: grid;
  gap: 4px;
}

.privacy-points strong {
  font-size: 15px;
}

.privacy-points small {
  color: rgba(255, 255, 255, 0.52);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  min-height: 260px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: 28px;
  box-shadow: 0 18px 45px rgba(30, 60, 90, 0.09);
}

.feature-blue { background: linear-gradient(155deg, #e8f6ff, #f5fbff); }
.feature-pink { background: linear-gradient(155deg, #fff0f7, #fff8fb); }
.feature-green { background: linear-gradient(155deg, #eafaf2, #f8fcfa); }
.feature-violet { background: linear-gradient(155deg, #f2edff, #fbf9ff); }

.feature-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 17px;
  color: var(--blue-deep);
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 10px 24px rgba(30, 70, 110, 0.08);
  font-size: 25px;
  font-weight: 800;
}

.feature-card h3 {
  margin: 40px 0 12px;
  font-size: 20px;
  letter-spacing: -0.035em;
}

.feature-card p {
  margin: 0;
  color: #657587;
  font-size: 14px;
  line-height: 1.72;
}

.device-section {
  padding-top: 40px;
  display: grid;
  grid-template-columns: 0.62fr 1.38fr;
  align-items: center;
  gap: 70px;
}

.tablet-frame {
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: 38px;
  background: rgba(255, 255, 255, 0.75);
  box-shadow: var(--shadow);
  transform: perspective(1200px) rotateY(-4deg) rotateX(2deg);
}

.tablet-frame img {
  border-radius: 27px;
}

.faq-section {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 80px;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  padding: 25px 42px 25px 0;
  cursor: pointer;
  font-size: 17px;
  font-weight: 720;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  float: right;
  margin-right: -34px;
  color: var(--blue);
  font-size: 24px;
  font-weight: 400;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  margin: -4px 0 26px;
  color: #667587;
  font-size: 15px;
  line-height: 1.75;
}

.download-section {
  position: relative;
  overflow: hidden;
  padding-block: 130px;
  color: white;
  background: #0c2035;
}

.download-glow {
  position: absolute;
  width: 780px;
  height: 780px;
  top: -430px;
  left: 50%;
  border-radius: 50%;
  background: conic-gradient(from 90deg, #3bb6ff, #ee78c5, #8e7aff, #3bb6ff);
  filter: blur(90px);
  opacity: 0.28;
  transform: translateX(-50%);
}

.download-inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.download-inner > img {
  width: 106px;
  height: 106px;
  margin-bottom: 28px;
  border-radius: 27px;
  box-shadow: 0 25px 55px rgba(0, 0, 0, 0.28);
}

.download-inner .eyebrow {
  margin-bottom: 18px;
}

.download-inner h2 {
  max-width: 730px;
}

.download-inner > p:not(.eyebrow) {
  max-width: 620px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.64);
  font-size: 17px;
  line-height: 1.8;
}

.platform-pill {
  margin-top: 34px;
  padding: 14px 20px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
  font-weight: 700;
}

.site-footer {
  min-height: 116px;
  display: flex;
  align-items: center;
  gap: 34px;
  color: #7a8897;
  font-size: 13px;
}

.footer-brand img {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

.footer-brand span {
  font-size: 18px;
}

.site-footer p:nth-of-type(1) {
  margin-right: auto;
}

@media (max-width: 980px) {
  .site-header nav {
    display: none;
  }

  .nav-cta {
    margin-left: auto;
  }

  .hero {
    grid-template-columns: 1fr;
    padding-top: 74px;
    text-align: center;
  }

  .hero-copy {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .hero-description {
    max-width: 690px;
  }

  .hero-visual {
    width: min(670px, 100%);
    margin: -30px auto 0;
  }

  .mode-grid,
  .privacy-grid,
  .device-section,
  .faq-section {
    grid-template-columns: 1fr;
  }

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

  .privacy-grid {
    gap: 40px;
  }

  .privacy-visual {
    min-height: 390px;
  }

  .device-section,
  .faq-section {
    gap: 46px;
  }
}

@media (max-width: 640px) {
  :root {
    --shell: min(100% - 32px, 1180px);
    --radius: 26px;
  }

  .site-header {
    top: 8px;
    top: max(8px, env(safe-area-inset-top));
    width: calc(100vw - 16px);
    width: calc(100vw - 16px - env(safe-area-inset-left) - env(safe-area-inset-right));
    height: 62px;
    margin-top: 8px;
    margin-top: max(8px, env(safe-area-inset-top));
    border-radius: 19px;
  }

  .brand img {
    width: 40px;
    height: 40px;
    border-radius: 11px;
  }

  .brand span {
    font-size: 19px;
  }

  .brand small,
  .nav-cta {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 74px 0 50px;
    gap: 36px;
  }

  .hero h1 {
    font-size: clamp(38px, 11.5vw, 62px);
  }

  .hero-description {
    font-size: 16px;
    line-height: 1.75;
  }

  .hero-facts {
    width: 100%;
    justify-content: space-between;
    gap: 12px;
  }

  .hero-visual {
    min-height: 570px;
    overflow: hidden;
    border-radius: 32px;
  }

  .ambient-blue {
    width: 330px;
    height: 330px;
    left: 0;
  }

  .phone-card {
    width: 76%;
  }

  .floating-note {
    padding: 11px 12px;
  }

  .floating-note-top {
    top: 76px;
    right: 0;
  }

  .floating-note-bottom {
    bottom: 84px;
    left: 0;
  }

  .note-icon {
    width: 32px;
    height: 32px;
  }

  .marquee div {
    min-width: 0;
    min-height: auto;
    padding: 22px 24px;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 24px;
    font-size: 16px;
  }

  .section {
    padding-block: 88px;
  }

  .section-heading {
    margin-bottom: 42px;
  }

  .section-heading h2,
  .privacy-copy h2,
  .device-copy h2,
  .download-inner h2 {
    font-size: clamp(31px, 9.5vw, 42px);
  }

  .mode-card {
    min-height: 700px;
  }

  .mode-copy {
    padding: 32px 26px 0;
  }

  .mode-card > img {
    width: 73%;
    bottom: -25%;
  }

  .privacy-visual {
    min-height: 330px;
  }

  .orbit-one {
    width: 310px;
    height: 310px;
  }

  .orbit-two {
    width: 240px;
    height: 240px;
  }

  .privacy-lock {
    width: 176px;
    height: 176px;
  }

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

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

  .tablet-frame {
    padding: 7px;
    border-radius: 25px;
    transform: none;
  }

  .tablet-frame img {
    border-radius: 18px;
  }

  .download-section {
    padding-block: 100px;
  }

  .site-footer {
    padding-block: 30px;
    flex-wrap: wrap;
    gap: 16px 24px;
  }

  .site-footer p {
    margin: 0;
  }

  .site-footer p:nth-of-type(1) {
    width: 100%;
    order: 3;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .phone-card {
    animation: float 7s ease-in-out infinite;
  }

  .floating-note-top {
    animation: float-note 6s 800ms ease-in-out infinite;
  }

  .floating-note-bottom {
    animation: float-note 6.5s 1.6s ease-in-out infinite reverse;
  }
}

@keyframes float {
  0%, 100% { transform: rotate(3deg) translateY(0); }
  50% { transform: rotate(2deg) translateY(-12px); }
}

@keyframes float-note {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}