:root {
  --ink: #171c2a;
  --deep-blue: #06155f;
  --page-bg: #ffffff;
  --footer-bg: #020203;
  --card-shadow: 0 18px 42px rgba(38, 95, 160, 0.13);
  --shadow-blue: 0 14px 30px rgba(57, 92, 255, 0.13);
  --scroll-progress: 0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 68px;
  scrollbar-color: #5365ff #eaf7ff;
  scrollbar-width: thin;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--page-bg);
  font-family:
    "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", Arial, sans-serif;
}

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

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

::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #eaf7ff;
}

::-webkit-scrollbar-thumb {
  border: 2px solid #eaf7ff;
  border-radius: 999px;
  background: linear-gradient(180deg, #5365ff 0%, #28c9e8 100%);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #4658ef 0%, #17afd9 100%);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  width: 100%;
  height: 3px;
  pointer-events: none;
  background: linear-gradient(90deg, #5365ff 0%, #28c9e8 55%, #9b5cff 100%);
  box-shadow: 0 0 18px rgba(58, 117, 255, 0.38);
  transform: scaleX(var(--scroll-progress));
  transform-origin: left center;
  transition: transform 0.08s linear;
}

.site-page {
  min-height: 100vh;
  overflow-x: hidden;
}

.shell {
  width: min(100% - 32px, 560px);
  margin: 0 auto;
}

.hero-section {
  position: relative;
  height: auto;
  padding-top: 56px;
  overflow: hidden;
  background: #e8f8ff url("023.jpg") center top / auto 100% no-repeat;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 80;
  width: 100%;
  height: 68px;
  padding-top: 22px;
  transition:
    background-color 0.28s ease,
    box-shadow 0.28s ease,
    backdrop-filter 0.28s ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 12px 34px rgba(33, 61, 145, 0.12);
  -webkit-backdrop-filter: blur(16px) saturate(1.22);
  backdrop-filter: blur(16px) saturate(1.22);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand {
  width: min(196px, 52vw);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-btn,
.primary-cta {
  --button-c1: #0cc7b6;
  --button-c2: #008cff;
  --button-c3: #5f61ff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  color: #fff;
  font-weight: 700;
  white-space: nowrap;
  background: linear-gradient(
    90deg,
    var(--button-c1),
    var(--button-c2),
    var(--button-c3),
    var(--button-c1)
  );
  background-size: 300% 100%;
  box-shadow: 0 10px 20px rgba(0, 142, 255, 0.22);
  animation: button-gradient-flow 4s linear infinite;
  cursor: pointer;
  isolation: isolate;
  overflow: hidden;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
  will-change: transform;
}

.nav-btn:hover,
.nav-btn:focus-visible,
.primary-cta:hover,
.primary-cta:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 14px 26px rgba(0, 142, 255, 0.3);
  outline: none;
}

.nav-btn:active,
.primary-cta:active {
  transform: translateY(1px);
}

.nav-btn {
  min-width: 0;
  height: 34px;
  padding: 0 12px;
  border-radius: 8px;
  font-size: 13px;
}

.nav-btn-register {
  --button-c1: #0ac7b8;
  --button-c2: #09aee3;
  --button-c3: #0ac7b8;
}

.nav-btn-register:hover,
.nav-btn-register:focus-visible {
  --button-c1: #06aaa0;
  --button-c2: #078fc4;
  --button-c3: #059a93;
}

.nav-btn-download {
  --button-c1: #008cff;
  --button-c2: #366dff;
  --button-c3: #685dff;
}

.nav-btn-download:hover,
.nav-btn-download:focus-visible {
  --button-c1: #0074dc;
  --button-c2: #2759df;
  --button-c3: #574ade;
}

.primary-cta {
  --button-c1: #0cc7b6;
  --button-c2: #008cff;
  --button-c3: #665dff;
  width: 198px;
  height: 52px;
  border-radius: 999px;
  font-size: 17px;
}

.primary-cta:hover,
.primary-cta:focus-visible {
  --button-c1: #08ada2;
  --button-c2: #0075df;
  --button-c3: #574bdc;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: block;
  width: min(100% - 32px, 560px);
  margin: 0 auto;
}

.hero-copy {
  position: relative;
  z-index: 2;
  width: auto;
  padding-top: 58px;
}

.hero-copy h1 {
  width: min(100%, 350px);
  margin: 0;
  opacity: 0;
  animation: hero-copy-slide-in 0.72s cubic-bezier(0.22, 1, 0.36, 1) 0.08s
    forwards;
}

.hero-kicker {
  max-width: 420px;
  margin: 24px 0 0;
  color: #202633;
  font-size: 20px;
  font-weight: 800;
  line-height: 1.35;
  opacity: 0;
  animation: hero-copy-slide-in 0.72s cubic-bezier(0.22, 1, 0.36, 1) 0.28s
    forwards;
}

.hero-desc {
  max-width: 410px;
  margin: 18px 0 0;
  color: #4c5a73;
  font-size: 15px;
  line-height: 1.8;
  opacity: 0;
  animation: hero-copy-slide-in 0.72s cubic-bezier(0.22, 1, 0.36, 1) 0.48s
    forwards;
}

.hero-desc br {
  display: none;
}

.hero-copy .primary-cta {
  margin-top: 28px;
}

.hero-art {
  position: absolute;
  top: calc(100% - 44px);
  right: auto;
  left: 160px;
  z-index: 1;
  width: 220px;
  height: 0;
  margin: 0;
  pointer-events: none;
}

.hero-hand {
  position: absolute;
  top: -26px;
  right: -84px;
  z-index: 3;
  width: 240px;
  opacity: 0;
  animation: hero-hand-slide-in 1.05s cubic-bezier(0.22, 1, 0.36, 1) 0.72s
    forwards;
}

.hero-ai {
  position: absolute;
  top: -11px;
  right: 105px;
  z-index: 1;
  width: 38px;
  opacity: 0;
  transform: scale(0);
  animation: hero-ai-slide-in 1.05s cubic-bezier(0.22, 1, 0.36, 1) 0.9s forwards;
}

.hero-ai-shine {
  position: absolute;
  top: 62px;
  right: 128px;
  z-index: 2;
  width: 38px;
  opacity: 0;
  pointer-events: none;
  filter: brightness(2.45) saturate(1.22)
    drop-shadow(0 0 14px rgba(255, 255, 255, 0.85));
  mix-blend-mode: screen;
  clip-path: polygon(-56% 0, -12% 0, 13% 100%, -31% 100%);
  animation: hero-ai-light-sweep 3.8s ease-in-out 0.8s infinite;
}

.feature-nav {
  position: relative;
  z-index: 3;
  display: grid;
  width: min(100% - 32px, 560px);
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 90px auto 0;
  padding-bottom: 42px;
}

.feature-card {
  min-width: 0;
  min-height: 150px;
  padding: 18px 10px 15px;
  border-radius: 12px;
  background: #fff;
  box-shadow: var(--card-shadow);
  text-align: center;
}

.feature-card img {
  width: 48px;
  height: 48px;
  margin: 0 auto 10px;
  object-fit: contain;
}

.feature-card h2 {
  margin: 0;
  color: var(--deep-blue);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.28;
}

.feature-card p {
  margin: 8px 0 0;
  color: #263668;
  font-size: 12px;
  line-height: 1.45;
}

.features-section {
  padding: 58px 0 0;
  background: #fff;
}

.section-heading {
  text-align: center;
}

.section-heading h2,
.advantage-heading h2 {
  margin: 0;
  color: #202532;
  font-size: 24px;
  font-weight: 900;
  line-height: 1.3;
}

.section-heading p,
.advantage-heading p {
  margin: 10px 0 0;
  color: #9aa2b3;
  font-size: 14px;
  line-height: 1.6;
}

.feature-pairs {
  margin-top: 34px;
}

.feature-pair {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: start;
  margin-bottom: 56px;
}

.feature-pair img {
  width: 100%;
  aspect-ratio: 1440 / 1120;
  border-radius: 14px;
  opacity: 0;
  filter: blur(7px);
  transform: translate3d(-64px, 0, 0);
  transition:
    opacity 0.72s cubic-bezier(0.22, 1, 0.36, 1),
    filter 0.72s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.72s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, filter, transform;
}

.feature-pair img:nth-of-type(2) {
  transform: translate3d(64px, 0, 0);
  transition-delay: 90ms;
}

.feature-pair.is-revealed img {
  opacity: 1;
  filter: blur(0);
  transform: translate3d(0, 0, 0);
}

.pair-cta {
  justify-self: center;
  margin-top: 6px;
}

.advantage-section {
  margin-top: 0;
  padding: 46px 0 50px;
  color: #fff;
  background: linear-gradient(105deg, #27c2d6 0%, #348eed 54%, #5368ff 100%);
}

.advantage-heading {
  text-align: center;
}

.advantage-heading h2,
.advantage-heading p {
  color: #fff;
}

.advantage-heading p {
  opacity: 0.92;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 28px auto 0;
}

.advantage-grid article {
  min-height: 170px;
  padding: 22px 10px 18px;
  border-radius: 10px;
  background: #fff;
  text-align: center;
  box-shadow: 0 18px 36px rgba(25, 76, 150, 0.1);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
  will-change: transform;
}

.advantage-grid article:hover,
.advantage-grid article:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow-blue);
}

.advantage-grid img {
  width: 48px;
  height: 48px;
  margin: 0 auto;
  object-fit: contain;
}

.advantage-grid h3 {
  margin: 13px 0 8px;
  color: var(--deep-blue);
  font-size: 18px;
  font-weight: 900;
  line-height: 1.25;
}

.advantage-grid p {
  margin: 0;
  color: #8e98ad;
  font-size: 12px;
  line-height: 1.65;
}

.site-footer {
  background: var(--footer-bg);
  color: #fff;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  padding: 42px 0 30px;
}

.footer-brand img {
  width: min(282px, 80vw);
}

.footer-brand p {
  margin: 18px 0 0;
  color: #7180a3;
  font-size: 14px;
  line-height: 1.9;
}

.footer-products h2,
.footer-contact h2 {
  margin: 0 0 16px;
  font-size: 19px;
  font-weight: 800;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 22px;
}

.footer-links ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
  color: #7180a3;
  font-size: 14px;
  line-height: 1.45;
}

.contact-row {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-row img {
  width: 104px;
  height: 104px;
  border-radius: 10px;
}

.contact-row p {
  margin: 0;
  color: #7180a3;
  font-size: 14px;
  line-height: 1.8;
}

.footer-record {
  padding: 0 24px 30px;
  color: #63718f;
  text-align: center;
  font-size: 12px;
  line-height: 1.6;
}

.motion-reveal {
  --reveal-y: 36px;
  --reveal-scale: 0.985;
  opacity: 0;
  filter: blur(10px);
  transform: translate3d(0, var(--reveal-y), 0) scale(var(--reveal-scale));
  transition:
    opacity 0.78s cubic-bezier(0.22, 1, 0.36, 1),
    filter 0.78s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.78s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.2s ease;
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, filter, transform;
}

.motion-reveal.is-revealed {
  opacity: 1;
  filter: blur(0);
  transform: translate3d(0, 0, 0) scale(1);
}

.advantage-heading p.motion-reveal.is-revealed {
  opacity: 0.92;
}

.hero-copy .primary-cta.motion-reveal {
  --reveal-y: 22px;
  --reveal-scale: 0.995;
}

.pair-cta.motion-reveal {
  --reveal-y: 24px;
  --reveal-scale: 0.99;
}

.feature-card.motion-reveal,
.features-section .section-heading.motion-reveal,
.advantage-grid article.motion-reveal {
  --reveal-y: 30px;
  --reveal-scale: 0.965;
}

.advantage-heading > .motion-reveal,
.footer-brand.motion-reveal,
.footer-products.motion-reveal,
.footer-contact.motion-reveal {
  --reveal-y: 28px;
}

.feature-card.motion-reveal.is-revealed:hover,
.feature-card.motion-reveal.is-revealed:focus-within {
  transform: translateY(-2px);
}

.primary-cta.motion-reveal.is-revealed:hover,
.primary-cta.motion-reveal.is-revealed:focus-visible {
  transform: translateY(-2px);
}

.primary-cta.motion-reveal.is-revealed:active {
  transform: translateY(1px);
}

.advantage-grid article.motion-reveal.is-revealed:hover,
.advantage-grid article.motion-reveal.is-revealed:focus-within {
  transform: translateY(-2px);
}

@media (max-width: 420px) {
  html {
    scroll-padding-top: 104px;
  }

  .hero-section {
    padding-top: 102px;
  }

  .site-header {
    height: 104px;
  }

  .header-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-actions {
    width: 100%;
  }

  .nav-btn {
    flex: 1;
  }

  .hero-copy {
    padding-top: 36px;
  }

  .hero-art {
    top: calc(100% - 44px);
    right: auto;
    left: 148px;
    width: 210px;
    height: 0;
  }

  .hero-hand {
    top: -24px;
    right: -84px;
    width: 228px;
  }

  .hero-ai {
    top: -11px;
    right: 105px;
    width: 36px;
  }

  .hero-ai-shine {
    top: -11px;
    right: 105px;
    width: 36px;
  }

  .feature-nav {
    grid-template-columns: 1fr;
    margin-top: 116px;
  }

  .feature-card {
    display: grid;
    min-height: 126px;
    grid-template-columns: 54px 1fr;
    column-gap: 12px;
    align-items: center;
    text-align: left;
  }

  .feature-card img {
    grid-row: span 2;
    margin: 0;
  }

  .feature-card p {
    margin-top: 4px;
  }
}

@keyframes hero-copy-slide-in {
  from {
    opacity: 0;
    transform: translateX(-56px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes hero-hand-slide-in {
  from {
    opacity: 0;
    transform: translate(96px, 74px);
  }

  to {
    opacity: 1;
    transform: translate(0, 0);
  }
}

@keyframes hero-ai-light-sweep {
  0%,
  44% {
    opacity: 0;
    clip-path: polygon(-56% 0, -12% 0, 13% 100%, -31% 100%);
  }

  50% {
    opacity: 0.95;
  }

  62%,
  100% {
    opacity: 0;
    clip-path: polygon(88% 0, 132% 0, 157% 100%, 113% 100%);
  }
}

@keyframes hero-ai-slide-in {
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes button-gradient-flow {
  to {
    background-position: 300% 0;
  }
}