:root {
  --ink: #1f1b2b;
  --muted: #77718a;
  --soft: #a69fba;
  --lavender: #9f8fe8;
  --lavender-dark: #7567c3;
  --line: rgba(80, 66, 120, 0.11);
  --paper: #fffdfc;
  --wash: #f8f5ff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

img {
  display: block;
}

.site-header {
  position: absolute;
  z-index: 30;
  top: 0;
  left: 50%;
  width: min(100% - 48px, 1380px);
  height: 112px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.mark {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 48px;
  flex: 0 0 auto;
  overflow: hidden;
  border-radius: 14px;
  box-shadow: 0 12px 28px rgba(112, 90, 180, 0.12);
}

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

.brand-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-copy strong {
  color: #736695;
  font-size: 17px;
  letter-spacing: 0.13em;
}

.brand-copy small {
  color: #aaa1c4;
  font-size: 11px;
  font-weight: 600;
}

.hero {
  position: relative;
  min-height: 900px;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(400px, 0.77fr) minmax(600px, 1.23fr);
  align-items: center;
  gap: 34px;
  padding: 140px max(44px, calc((100vw - 1380px) / 2)) 88px;
  background:
    linear-gradient(120deg, rgba(255, 253, 252, 0.96) 0 38%, rgba(251, 248, 255, 0.78) 70%),
    #fffdfc;
}

.hero::after {
  content: "";
  position: absolute;
  z-index: 0;
  inset: auto 0 0;
  height: 210px;
  background: linear-gradient(to top, #fffdfc 7%, transparent);
  pointer-events: none;
}

.hero-glow,
.download-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(30px);
  pointer-events: none;
}

.hero-glow-one {
  top: -160px;
  right: -80px;
  width: 650px;
  height: 650px;
  background: rgba(219, 209, 255, 0.42);
}

.hero-glow-two {
  bottom: -280px;
  left: 20%;
  width: 590px;
  height: 590px;
  background: rgba(255, 218, 238, 0.35);
}

.hero-copy,
.hero-visual {
  position: relative;
  z-index: 2;
}

.eyebrow {
  margin: 0;
  color: #9587b3;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.25em;
}

.hero h1 {
  max-width: 650px;
  margin: 28px 0 26px;
  font-size: clamp(62px, 6.1vw, 100px);
  font-weight: 730;
  letter-spacing: -0.065em;
  line-height: 1.03;
}

.hero h1 span {
  color: transparent;
  background: linear-gradient(110deg, #796bc5, #ae8ce2 55%, #7dbbd7);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-intro {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  gap: 28px;
  padding: 0 27px;
  border: 1px solid transparent;
  border-radius: 16px;
  font-size: 15px;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

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

.button-primary {
  color: #fff;
  background: linear-gradient(135deg, #8f7fdc, #7464c2);
  box-shadow: 0 16px 36px rgba(116, 100, 194, 0.28);
}

.hero-actions .button-primary {
  padding-inline: 22px;
}

.button-primary:hover {
  box-shadow: 0 20px 42px rgba(116, 100, 194, 0.36);
}

.button-ghost {
  color: #605875;
  border-color: rgba(92, 76, 135, 0.14);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(12px);
}

.platform-note {
  margin: 18px 0 0;
  color: #a19aaf;
  font-size: 12px;
}

.hero-visual {
  height: 680px;
}

.hero-card {
  position: absolute;
  overflow: hidden;
  margin: 0;
  border: 9px solid rgba(255, 255, 255, 0.92);
  border-radius: 27px;
  background: #f4f1fa;
  box-shadow:
    0 38px 80px rgba(73, 57, 108, 0.2),
    0 4px 18px rgba(73, 57, 108, 0.06);
}

.hero-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-card-main {
  z-index: 3;
  top: 80px;
  right: -12%;
  width: 90%;
  aspect-ratio: 4 / 3;
  transform: rotate(1.5deg);
}

.hero-card-back {
  z-index: 1;
  top: 18px;
  right: -3%;
  width: 78%;
  aspect-ratio: 4 / 3;
  transform: rotate(-4deg);
  filter: saturate(0.88);
  opacity: 0.72;
}

.orb {
  position: absolute;
  z-index: 2;
  border-radius: 50%;
  filter: blur(2px);
}

.orb-one {
  top: 56px;
  left: 10px;
  width: 180px;
  height: 180px;
  background: linear-gradient(145deg, #85d4ee, #cab0ff 65%, #fec7e4);
  opacity: 0.6;
}

.orb-two {
  right: 40px;
  bottom: 0;
  width: 130px;
  height: 130px;
  background: linear-gradient(145deg, #ac8cf4, #7fd6cc);
  opacity: 0.38;
}

.floating-note {
  position: absolute;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 18px;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.83);
  box-shadow: 0 18px 44px rgba(76, 63, 111, 0.14);
  backdrop-filter: blur(18px);
}

.floating-note span:not(.floating-icon):not(.floating-number) {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.floating-note strong {
  color: #403a4e;
  font-size: 13px;
}

.floating-note small {
  color: #938ba2;
  font-size: 10px;
}

.floating-icon {
  display: grid;
  width: 39px;
  height: 39px;
  place-items: center;
  color: #fff;
  border-radius: 13px;
  background: linear-gradient(145deg, #a997ec, #70c4dd);
  font-size: 23px;
}

.floating-number {
  color: #8b78d4;
  font-family: Georgia, serif;
  font-size: 31px;
  line-height: 1;
}

.floating-note-top {
  top: 24px;
  left: 2%;
}

.floating-note-bottom {
  right: 2%;
  bottom: 58px;
}

.promise {
  width: min(100% - 48px, 1220px);
  margin: 0 auto;
  padding: 130px 0 150px;
  text-align: center;
}

.promise-text {
  margin: 32px auto 82px;
  color: #332e3d;
  font-size: clamp(36px, 4.1vw, 62px);
  font-weight: 650;
  letter-spacing: -0.05em;
  line-height: 1.35;
}

.promise-text em {
  color: #9281d4;
  font-family: Georgia, "Songti SC", serif;
  font-weight: 500;
}

.promise-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  text-align: left;
  border-top: 1px solid var(--line);
}

.promise-points div {
  min-height: 185px;
  padding: 34px 40px;
  border-right: 1px solid var(--line);
}

.promise-points div:last-child {
  border-right: 0;
}

.promise-points span {
  display: block;
  color: #b1a8c0;
  font-family: Georgia, serif;
  font-size: 13px;
}

.promise-points strong {
  display: block;
  margin: 24px 0 9px;
  font-size: 22px;
}

.promise-points p {
  margin: 0;
  color: #858091;
  font-size: 14px;
  line-height: 1.7;
}

.features {
  padding: 88px 0 0;
  background:
    radial-gradient(circle at 90% 15%, rgba(220, 211, 255, 0.42), transparent 29%),
    linear-gradient(180deg, #f7f4fd, #fffdfc 92%);
}

.feature-carousel-shell {
  position: relative;
  width: min(100% - 48px, 1380px);
  margin: 0 auto;
}

.carousel-controls {
  position: absolute;
  z-index: 6;
  top: 28px;
  left: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin: 0;
  transform: translateX(-50%);
}

.carousel-dots {
  display: flex;
  align-items: center;
  gap: 9px;
}

.carousel-dots button {
  width: 8px;
  height: 8px;
  padding: 0;
  border: 0;
  border-radius: 999px;
  background: #d8d1e7;
  cursor: pointer;
  transition: width 180ms ease, background 180ms ease;
}

.carousel-dots button.is-active {
  width: 28px;
  background: #8574d1;
}

.feature-list {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 100%;
  gap: 28px;
  overflow-x: auto;
  padding: 4px;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  overscroll-behavior-x: contain;
}

.feature-list::-webkit-scrollbar {
  display: none;
}

.feature {
  width: 100%;
  margin: 0;
  display: grid;
  grid-template-columns: minmax(330px, 0.75fr) minmax(600px, 1.25fr);
  align-items: center;
  gap: 66px;
  padding: 70px;
  border: 1px solid rgba(100, 85, 145, 0.09);
  border-radius: 38px;
  background: rgba(255, 255, 255, 0.68);
  box-shadow: none;
  backdrop-filter: blur(12px);
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.feature:nth-child(even) .feature-copy {
  order: 2;
}

.feature:nth-child(even) .feature-image {
  order: 1;
}

.feature-index {
  display: flex;
  align-items: center;
  gap: 16px;
  color: #9a8eb3;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.feature-index span:first-child {
  display: grid;
  width: 39px;
  height: 39px;
  place-items: center;
  border-radius: 50%;
  background: #f1ecfb;
  font-family: Georgia, serif;
  letter-spacing: 0;
}

.feature h3 {
  margin: 31px 0 27px;
  font-size: clamp(42px, 4vw, 64px);
  letter-spacing: -0.055em;
  line-height: 1.17;
}

.feature h3 span {
  display: block;
}

.feature-copy > p {
  max-width: 410px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.95;
}

.feature-image {
  position: relative;
  overflow: hidden;
  width: 100%;
  aspect-ratio: 4 / 3;
  margin: 0;
  border: 8px solid rgba(255, 255, 255, 0.95);
  border-radius: 25px;
  background: #f3effa;
  box-shadow: 0 24px 54px rgba(71, 54, 110, 0.13);
}

.feature-image img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feature-image-1 {
  transform: rotate(0.8deg);
}

.feature-image-2 {
  transform: rotate(-0.8deg);
}

.feature-image-3 {
  transform: rotate(0.6deg);
}

.feature-image-4 {
  transform: rotate(-0.6deg);
}

.download {
  position: relative;
  overflow: hidden;
  width: min(100% - 48px, 1380px);
  min-height: 720px;
  margin: 32px auto 70px;
  padding: 100px 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 1px solid rgba(130, 109, 196, 0.12);
  border-radius: 44px;
  background:
    radial-gradient(circle at 10% 100%, rgba(255, 211, 235, 0.5), transparent 35%),
    radial-gradient(circle at 92% 6%, rgba(196, 222, 255, 0.55), transparent 34%),
    linear-gradient(145deg, #fbf8ff, #f1ecff);
}

.download::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -180px;
  width: 430px;
  height: 430px;
  border: 80px solid rgba(143, 127, 220, 0.08);
  border-radius: 50%;
}

.download-glow {
  top: 35%;
  left: 38%;
  width: 360px;
  height: 360px;
  background: rgba(255, 255, 255, 0.85);
}

.download > *:not(.download-glow) {
  position: relative;
  z-index: 2;
}

.download-brand {
  margin-bottom: 34px;
}

.download h2 {
  margin: 27px 0 24px;
  font-size: clamp(52px, 6vw, 88px);
  letter-spacing: -0.065em;
  line-height: 1.08;
}

.download > p:not(.eyebrow) {
  margin: 0 0 38px;
  color: #7d758c;
  font-size: 17px;
}

footer {
  width: min(100% - 48px, 1380px);
  min-height: 150px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  color: #91899e;
  border-top: 1px solid var(--line);
  font-size: 12px;
}

footer > span {
  justify-self: end;
}

.footer-brand .mark {
  width: 38px;
  height: 38px;
  border-radius: 11px;
}

@media (max-width: 1100px) {
  .hero {
    min-height: 810px;
    grid-template-columns: 0.8fr 1.2fr;
  }

  .hero-visual {
    height: 560px;
  }

  .feature {
    gap: 40px;
    padding: 48px;
  }
}

@media (max-width: 820px) {
  .site-header {
    width: calc(100% - 34px);
    height: 86px;
  }

  .brand-copy small {
    display: none;
  }

  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 150px 20px 60px;
  }

  .hero h1 {
    margin-top: 22px;
    font-size: clamp(54px, 15vw, 78px);
  }

  .hero-intro br {
    display: none;
  }

  .hero-visual {
    height: 530px;
  }

  .hero-card-main {
    top: 85px;
    right: -11%;
    width: 105%;
  }

  .hero-card-back {
    right: -2%;
    width: 91%;
  }

  .floating-note-top {
    left: 0;
  }

  .floating-note-bottom {
    right: 0;
  }

  .promise {
    padding: 90px 0 110px;
  }

  .promise-points {
    grid-template-columns: 1fr;
  }

  .promise-points div {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .features {
    padding-top: 64px;
  }

  .feature-carousel-shell {
    width: calc(100% - 24px);
  }

  .carousel-controls {
    top: 18px;
    gap: 14px;
  }

  .carousel-dots {
    justify-self: center;
  }

  .feature-list {
    gap: 16px;
    padding: 3px;
  }

  .feature {
    width: 100%;
    grid-template-columns: 1fr;
    gap: 38px;
    padding: 34px 24px 24px;
    border-radius: 28px;
  }

  .feature:nth-child(even) .feature-copy,
  .feature:nth-child(even) .feature-image {
    order: initial;
  }

  .feature-image {
    border-width: 5px;
    border-radius: 19px;
  }

  .download {
    width: calc(100% - 24px);
    min-height: 620px;
    margin-top: 28px;
    padding: 75px 22px;
    border-radius: 30px;
  }

  footer {
    grid-template-columns: 1fr auto;
    padding: 30px 0;
  }

  footer p {
    display: none;
  }
}

@media (max-width: 480px) {
  .mark {
    width: 42px;
    height: 42px;
  }

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

  .hero {
    padding-top: 126px;
  }

  .hero-actions {
    align-items: stretch;
  }

  .hero-actions .button {
    flex: 0 0 auto;
  }

  .carousel-controls {
    justify-content: center;
  }

  .carousel-dots {
    justify-content: center;
  }

  .hero-visual {
    height: 410px;
  }

  .hero-card-main {
    top: 77px;
  }

  .floating-note {
    padding: 11px 13px;
  }

  .floating-note-bottom {
    bottom: 20px;
  }

  .promise-text {
    font-size: 34px;
  }

  .download h2 {
    font-size: 52px;
  }

  .feature h3 {
    font-size: 39px;
  }

  .feature-copy > p {
    font-size: 15px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ==========================================================================
   Dynamic Animations & Hover Micro-Interactions
   ========================================================================== */

/* 1. Hero Title Animated Gradient Shimmer */
@keyframes gradientShimmer {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.hero h1 span {
  background-size: 200% 200%;
  animation: gradientShimmer 6s ease infinite;
}

/* 2. Floating Note Subtle Bouncing Animation */
@keyframes floatSlow {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(-1deg); }
}

@keyframes floatSlowReverse {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(10px) rotate(1deg); }
}

.floating-note-top {
  animation: floatSlow 5.5s ease-in-out infinite;
}

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

/* 3. Ambient Glowing Orbs Motion */
@keyframes pulseOrb {
  0%, 100% { transform: scale(1) translate(0, 0); opacity: 0.55; }
  50% { transform: scale(1.12) translate(15px, -15px); opacity: 0.78; }
}

.orb-one {
  animation: pulseOrb 8s ease-in-out infinite;
}

.orb-two {
  animation: pulseOrb 10s ease-in-out infinite reverse;
}

/* 4. Interactive Card Hover Effects */
.hero-card-main {
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-card-main:hover {
  transform: rotate(0deg) scale(1.02) translateY(-8px);
  box-shadow: 0 45px 95px rgba(73, 57, 108, 0.28);
}

/* 5. Button Shine Light Sweep Effect */
.button-primary {
  position: relative;
  overflow: hidden;
}

.button-primary::after {
  content: "";
  position: absolute;
  top: -50%;
  left: -75%;
  width: 50%;
  height: 200%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.38), transparent);
  transform: rotate(25deg);
  transition: left 0.75s ease;
}

.button-primary:hover::after {
  left: 125%;
}

/* 6. Scroll Reveal Fade-in Animations (默认完全隐藏，下滑到可视区域才浮现) */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(45px);
  transition: opacity 0.85s cubic-bezier(0.16, 1, 0.3, 1), transform 0.85s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-on-scroll.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* 7. Initial Page Load Entrance Animations (首次进入页面的阶梯入场动画) */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.94) translateY(24px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@keyframes fadeInUpHeader {
  from {
    opacity: 0;
    transform: translate(-50%, 30px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

.site-header {
  animation: fadeInUpHeader 0.75s cubic-bezier(0.16, 1, 0.3, 1) 0.05s both;
}

.hero-copy .eyebrow {
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.15s both;
}

.hero-copy h1 {
  animation: fadeInUp 0.85s cubic-bezier(0.16, 1, 0.3, 1) 0.25s both;
}

.hero-intro {
  animation: fadeInUp 0.85s cubic-bezier(0.16, 1, 0.3, 1) 0.35s both;
}

.hero-actions,
.platform-note {
  animation: fadeInUp 0.85s cubic-bezier(0.16, 1, 0.3, 1) 0.45s both;
}

.hero-visual {
  animation: fadeInScale 1.05s cubic-bezier(0.16, 1, 0.3, 1) 0.3s both;
}