:root {
  --ink: #27202d;
  --muted: #786c82;
  --soft: #fbf8ff;
  --panel: #f0eaf5;
  --panel-strong: #e7ddee;
  --line: rgba(99, 70, 121, 0.14);
  --purple: #9a58e8;
  --purple-deep: #6e55ff;
  --pink: #e47be9;
  --coral: #ff765f;
  --white: #ffffff;
  --shadow: 0 22px 70px rgba(79, 48, 104, 0.18);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  color-scheme: light;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--soft);
  color: var(--ink);
  line-height: 1.65;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  width: 100%;
  height: 3px;
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: left;
  background: linear-gradient(90deg, var(--purple), var(--pink), var(--coral));
}

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

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

.site-header {
  position: fixed;
  top: 16px;
  left: 50%;
  z-index: 10;
  display: flex;
  width: min(1120px, calc(100% - 32px));
  min-height: 56px;
  transform: translateX(-50%);
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: 0 16px 48px rgba(72, 48, 88, 0.12);
  padding: 8px 10px 8px 18px;
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
}

.brand,
.site-nav,
.hero-actions,
.metric-row,
.footer-inner,
.footer-inner nav {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-logo {
  width: 34px;
  height: 36px;
  object-fit: contain;
  filter: drop-shadow(0 8px 14px rgba(130, 85, 233, 0.28));
}

.site-nav {
  gap: 4px;
  color: #4c4057;
  font-size: 14px;
  font-weight: 650;
  white-space: nowrap;
}

.site-nav a,
.button,
.download-card,
.legal-link {
  transition:
    transform 180ms ease,
    background 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
}

.site-nav a {
  border-radius: 999px;
  padding: 9px 13px;
}

.site-nav a:hover {
  background: rgba(154, 88, 232, 0.1);
}

.hero {
  position: relative;
  min-height: 72vh;
  display: grid;
  place-items: center;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 76% 26%, rgba(154, 88, 232, 0.22), transparent 24%),
    radial-gradient(circle at 18% 64%, rgba(255, 118, 95, 0.12), transparent 25%),
    linear-gradient(90deg, rgba(251, 248, 255, 0.96) 0%, rgba(251, 248, 255, 0.76) 47%, rgba(251, 248, 255, 0.36) 100%),
    url("assets/yuemai-home.png") center right 12% / min(46vw, 520px) auto no-repeat,
    #fbf8ff;
  padding: 120px 24px 50px;
}

.hero-aurora {
  position: absolute;
  inset: -22%;
  z-index: -2;
  overflow: hidden;
  filter: blur(24px);
  opacity: 0.86;
}

.hero-aurora span {
  position: absolute;
  width: 56vw;
  height: 36vw;
  border-radius: 999px;
  animation: auroraFlow 18s var(--ease-out) infinite alternate;
  mix-blend-mode: multiply;
}

.hero-aurora span:nth-child(1) {
  top: 1%;
  right: -8%;
  background: linear-gradient(135deg, rgba(154, 88, 232, 0.24), rgba(228, 123, 233, 0.18));
}

.hero-aurora span:nth-child(2) {
  bottom: 14%;
  left: -8%;
  animation-delay: -7s;
  background: linear-gradient(135deg, rgba(255, 118, 95, 0.14), rgba(154, 88, 232, 0.18));
}

.hero-aurora span:nth-child(3) {
  top: 28%;
  left: 22%;
  animation-delay: -12s;
  background: linear-gradient(135deg, rgba(178, 151, 255, 0.18), rgba(255, 255, 255, 0.42));
}

@keyframes auroraFlow {
  0% {
    transform: translate3d(-4%, 2%, 0) rotate(-8deg) scale(1);
  }

  100% {
    transform: translate3d(8%, -6%, 0) rotate(12deg) scale(1.18);
  }
}

.hero::after {
  position: absolute;
  inset: auto 0 0;
  z-index: -1;
  height: 28%;
  background: linear-gradient(0deg, var(--soft), rgba(251, 248, 255, 0));
  content: "";
}

.hero-copy {
  width: min(1120px, 100%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--purple);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.12;
}

h1 {
  max-width: 650px;
  font-size: clamp(76px, 12vw, 164px);
  font-weight: 900;
  letter-spacing: 0;
}

h2 {
  max-width: 740px;
  font-size: clamp(34px, 5vw, 68px);
  font-weight: 880;
  letter-spacing: 0;
}

h3 {
  font-size: 22px;
}

.hero-subtitle {
  margin: 10px 0 0;
  font-size: clamp(24px, 3vw, 42px);
  font-weight: 850;
}

.hero-text,
.section-copy p,
.feature-card p,
.legal-content p,
.legal-content li {
  color: var(--muted);
}

.hero-text {
  max-width: 610px;
  margin: 18px 0 0;
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 12px 20px;
  font-weight: 800;
}

.button.primary {
  background: linear-gradient(135deg, var(--purple), var(--pink));
  color: var(--white);
  box-shadow: 0 16px 34px rgba(154, 88, 232, 0.28);
}

.button.ghost {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.74);
}

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

.scroll-cue {
  position: absolute;
  right: 50%;
  bottom: 24px;
  display: inline-flex;
  transform: translateX(50%);
  align-items: center;
  gap: 9px;
  border: 0;
  background: transparent;
  color: rgba(39, 32, 45, 0.46);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 750;
}

.scroll-cue span {
  position: relative;
  width: 16px;
  height: 26px;
  border: 2px solid rgba(39, 32, 45, 0.18);
  border-radius: 999px;
}

.scroll-cue span::after {
  position: absolute;
  top: 5px;
  left: 50%;
  width: 4px;
  height: 4px;
  transform: translateX(-50%);
  animation: scrollDot 1.6s ease-in-out infinite;
  border-radius: 50%;
  background: var(--purple);
  content: "";
}

@keyframes scrollDot {
  0%,
  100% {
    opacity: 0.3;
    transform: translate(-50%, 0);
  }

  50% {
    opacity: 1;
    transform: translate(-50%, 8px);
  }
}

.section-inner {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.intro-section,
.features-section,
.download-section,
.legal-hero,
.legal-main {
  padding: 96px 0;
}

.intro-grid,
.download-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 44px;
  align-items: end;
}

.section-copy p {
  max-width: 660px;
  margin: 22px 0 0;
  font-size: 18px;
}

.metric-row {
  align-items: stretch;
  gap: 12px;
}

.metric {
  position: relative;
  flex: 1;
  min-width: 0;
  border: 1px solid rgba(154, 88, 232, 0.15);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.7);
  padding: 20px;
  box-shadow: 0 16px 34px rgba(62, 46, 77, 0.08);
  overflow: hidden;
}

.metric strong,
.metric span {
  display: block;
}

.metric strong {
  color: var(--purple);
  font-size: 22px;
}

.metric span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
}

.screens-section {
  overflow: hidden;
  padding: 28px 0 104px;
}

.screens-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr 0.95fr;
  align-items: center;
  gap: 22px;
}

.phone-shot {
  --rx: 0deg;
  --ry: 0deg;
  --mx: 50%;
  --my: 50%;
  position: relative;
  margin: 0;
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: 42px;
  background: var(--white);
  box-shadow: var(--shadow);
  overflow: hidden;
  transform-style: preserve-3d;
}

.phone-shot::after,
.feature-card::after,
.metric::after,
.download-card::after {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, 0.64), transparent 34%);
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease;
  content: "";
}

[data-tilt-card] {
  --rx: 0deg;
  --ry: 0deg;
  --mx: 50%;
  --my: 50%;
  will-change: transform;
  transition:
    transform 500ms var(--ease-out),
    box-shadow 500ms var(--ease-out),
    border-color 500ms var(--ease-out);
}

[data-tilt-card]:hover {
  box-shadow: 0 26px 80px rgba(79, 48, 104, 0.22);
}

[data-tilt-card].is-tilting {
  transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry)) translateY(-4px);
}

[data-tilt-card]:hover::after {
  opacity: 1;
}

.phone-shot img {
  width: 100%;
  height: auto;
}

.main-shot {
  --base-transform: translateY(24px) rotate(-3deg);
  transform: translateY(24px) rotate(-3deg);
}

.secondary-shot {
  --base-transform: translateY(-18px);
  transform: translateY(-18px);
}

.tertiary-shot {
  --base-transform: translateY(34px) rotate(3deg);
  transform: translateY(34px) rotate(3deg);
}

[data-tilt-card] {
  transform: var(--base-transform, none);
}

[data-tilt-card].is-tilting {
  transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry)) translateY(-4px) var(--base-transform, translateZ(0));
}

.section-heading {
  display: grid;
  gap: 12px;
  margin-bottom: 32px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  position: relative;
  min-height: 250px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 16px 46px rgba(69, 48, 84, 0.08);
  overflow: hidden;
  padding: 24px;
}

.feature-icon {
  display: inline-flex;
  margin-bottom: 24px;
  color: var(--coral);
  font-size: 14px;
  font-weight: 950;
}

.feature-card p {
  margin: 14px 0 0;
  font-size: 16px;
}

.download-section {
  background: linear-gradient(180deg, rgba(240, 234, 245, 0.72), rgba(251, 248, 255, 1));
}

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

.download-card {
  position: relative;
  display: grid;
  gap: 4px;
  min-height: 104px;
  border: 1px solid rgba(154, 88, 232, 0.18);
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.8);
  padding: 22px 24px;
  box-shadow: 0 14px 34px rgba(79, 48, 104, 0.1);
  overflow: hidden;
}

.download-card span {
  color: var(--purple);
  font-size: 14px;
  font-weight: 900;
}

.download-card strong {
  font-size: 22px;
}

.download-card small {
  color: var(--muted);
  font-size: 14px;
  overflow-wrap: anywhere;
}

.qr-download-card {
  grid-template-columns: minmax(0, 1fr) auto;
  column-gap: 18px;
  align-items: center;
}

.qr-download-card > span:not(.download-qr),
.qr-download-card > strong,
.qr-download-card > small {
  grid-column: 1;
}

.qr-download-card .download-qr {
  z-index: 1;
  grid-column: 2;
  grid-row: 1 / span 3;
  display: grid;
  justify-items: center;
  gap: 6px;
}

.download-qr img {
  width: 96px;
  height: 96px;
  border: 1px solid rgba(154, 88, 232, 0.16);
  border-radius: 14px;
  background: var(--white);
  padding: 7px;
}

.download-qr em {
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
  font-weight: 800;
}

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

.footer-inner {
  width: min(1120px, calc(100% - 40px));
  min-height: 86px;
  margin: 0 auto;
  justify-content: space-between;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.footer-inner nav {
  gap: 16px;
}

.legal-hero {
  padding-top: 144px;
  background:
    linear-gradient(120deg, rgba(251, 248, 255, 0.96), rgba(242, 231, 250, 0.82)),
    url("assets/yuemai-price-detail.png") right 12% top 34% / 340px auto no-repeat;
}

.legal-hero .section-inner {
  display: grid;
  gap: 18px;
}

.legal-hero h1 {
  font-size: clamp(42px, 7vw, 86px);
}

.legal-link {
  display: inline-flex;
  width: max-content;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  padding: 9px 14px;
  color: #4c4057;
  font-weight: 800;
}

.legal-content {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 0;
}

.legal-page .legal-main {
  padding: 112px 0 72px;
}

.hide-nav .site-header {
  display: none;
}

.hide-nav .legal-page .legal-main {
  padding-top: 48px;
}

.legal-content h1 {
  margin: 0;
  font-size: clamp(36px, 6vw, 64px);
  line-height: 1.12;
}

.legal-updated {
  margin: 12px 0 36px;
  color: var(--muted);
  font-size: 15px;
}

.legal-content h2 {
  margin-top: 38px;
  font-size: clamp(24px, 3vw, 34px);
}

.legal-content h3 {
  margin: 24px 0 8px;
  font-size: 19px;
  line-height: 1.45;
}

.legal-content h2:first-child {
  margin-top: 0;
}

.legal-content p,
.legal-content li {
  font-size: 16px;
}

.legal-content ul {
  padding-left: 1.2em;
}

.legal-content li ul {
  margin-top: 8px;
}

.legal-table-wrap {
  overflow-x: auto;
  margin: 18px 0 6px;
  border: 1px solid rgba(139, 104, 180, 0.2);
  border-radius: 8px;
}

.legal-table {
  width: 100%;
  min-width: 900px;
  border-collapse: collapse;
  background: rgba(255, 255, 255, 0.54);
  font-size: 14px;
}

.legal-table th,
.legal-table td {
  border-bottom: 1px solid rgba(139, 104, 180, 0.16);
  padding: 13px 14px;
  text-align: left;
  vertical-align: top;
}

.legal-table th {
  color: #30263a;
  font-weight: 850;
}

.legal-table td {
  color: var(--muted);
}

.legal-table tbody tr:last-child td {
  border-bottom: 0;
}

.icp-line {
  width: min(1120px, calc(100% - 40px));
  margin: 56px auto 0;
  color: var(--muted);
  font-size: 14px;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(34px) scale(0.985);
  transition:
    opacity 780ms var(--ease-out),
    transform 780ms var(--ease-out);
  transition-delay: calc(var(--reveal-index, 0) * 70ms);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

@media (max-width: 920px) {
  .site-header {
    top: 10px;
    align-items: flex-start;
    border-radius: 24px;
  }

  .site-nav {
    max-width: 68vw;
    flex-wrap: wrap;
    justify-content: flex-end;
    row-gap: 0;
  }

  .hero {
    min-height: 82svh;
    place-items: end start;
    background:
      radial-gradient(circle at 68% 34%, rgba(154, 88, 232, 0.18), transparent 32%),
      linear-gradient(180deg, rgba(251, 248, 255, 0.99) 0%, rgba(251, 248, 255, 0.96) 60%, rgba(251, 248, 255, 0.5) 100%),
      url("assets/yuemai-home.png") center bottom -6vh / min(88vw, 430px) auto no-repeat,
      #fbf8ff;
    padding-top: 136px;
  }

  .hero-copy {
    margin-bottom: 18vh;
  }

  .intro-grid,
  .download-grid,
  .screens-layout {
    grid-template-columns: 1fr;
  }

  .metric-row {
    flex-direction: column;
  }

  .screens-layout {
    width: min(420px, calc(100% - 40px));
  }

  .main-shot,
  .secondary-shot,
  .tertiary-shot {
    --base-transform: none;
    transform: none;
  }

  .secondary-shot,
  .tertiary-shot {
    display: none;
  }

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

  .legal-hero {
    background:
      linear-gradient(120deg, rgba(251, 248, 255, 0.96), rgba(242, 231, 250, 0.82)),
      #fbf8ff;
  }
}

@media (max-width: 620px) {
  .site-header {
    width: calc(100% - 20px);
    padding: 8px 8px 8px 12px;
  }

  .brand span:last-child {
    display: none;
  }

  .site-nav {
    max-width: calc(100vw - 78px);
    font-size: 12px;
  }

  .site-nav a {
    padding: 7px 9px;
  }

  .hero {
    padding-inline: 18px;
  }

  .hero-copy {
    margin-bottom: 16vh;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .section-inner,
  .footer-inner,
  .legal-content {
    width: min(100% - 28px, 1120px);
  }

  .intro-section,
  .features-section,
  .download-section,
  .legal-hero,
  .legal-main {
    padding: 72px 0;
  }

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

  .feature-card {
    min-height: auto;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 22px 0;
  }

  .qr-download-card {
    column-gap: 12px;
    padding-right: 16px;
  }

  .download-qr img {
    width: 82px;
    height: 82px;
    border-radius: 12px;
    padding: 6px;
  }

  .legal-page .legal-main {
    padding: 104px 0 56px;
  }

  .icp-line {
    width: min(100% - 28px, 1120px);
    margin-top: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}