* {
  box-sizing: border-box;
}

:root {
  --ink: #101513;
  --muted: #66736f;
  --mint: #28f0c5;
  --sky: #16baf0;
  --lime: #c9ff72;
  --pink: #ff86c6;
  --glass: rgba(255, 255, 255, .68);
  --line: rgba(255, 255, 255, .86);
  --shadow: 0 28px 90px rgba(34, 114, 114, .16);
}

html {
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #fbfffd;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  padding-bottom: 128px;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 12% 12%, rgba(38, 239, 204, .33), transparent 30%),
    radial-gradient(circle at 92% 4%, rgba(255, 237, 93, .4), transparent 26%),
    radial-gradient(circle at 72% 78%, rgba(255, 139, 204, .16), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, #f4fff9 48%, #ffffff 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  opacity: .46;
  background-image:
    linear-gradient(rgba(91, 191, 178, .2) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 191, 178, .2) 1px, transparent 1px);
  background-size: 48px 48px;
}

body::after {
  content: "WEIYAN";
  position: fixed;
  top: 70px;
  left: 50%;
  z-index: -1;
  transform: translateX(-50%);
  color: rgba(20, 30, 28, .035);
  font-size: min(18vw, 220px);
  font-weight: 900;
  line-height: 1;
  pointer-events: none;
}

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

img {
  user-select: none;
}

.site-timer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: min(680px, calc(100% - 32px));
  margin: 14px auto 0;
  padding: 10px 16px;
  border: 1px solid rgba(255, 255, 255, .86);
  border-radius: 999px;
  color: #27302d;
  background: rgba(255, 255, 255, .58);
  box-shadow: 0 14px 42px rgba(19, 91, 91, .08);
  font-size: 14px;
  font-weight: 800;
  backdrop-filter: blur(20px) saturate(1.2);
}

.site-timer strong {
  color: #049ed5;
  font-weight: 900;
}

.site-header {
  position: sticky;
  top: 14px;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 32px));
  margin: 14px auto 0;
  padding: 12px 14px 12px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .58);
  box-shadow: 0 18px 56px rgba(19, 91, 91, .1);
  backdrop-filter: blur(22px) saturate(1.25);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 25px;
  font-weight: 900;
  letter-spacing: 0;
}

.brand::before {
  content: "";
  width: 36px;
  height: 36px;
  border-radius: 13px;
  background: url("./assets/icon-1024.png") center / cover;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .75), 0 10px 22px rgba(0, 190, 170, .24);
}

nav {
  display: flex;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .44);
  color: #26302d;
  font-size: 14px;
  font-weight: 800;
}

nav a {
  padding: 10px 15px;
  border-radius: 999px;
}

nav a:hover {
  color: #069ed5;
  background: rgba(255, 255, 255, .78);
}

.hero {
  display: grid;
  grid-template-columns: minmax(320px, 420px) minmax(0, 1fr);
  gap: 54px;
  align-items: center;
  width: min(1220px, 100%);
  min-height: calc(100svh - 80px);
  margin: 0 auto;
  padding: 44px 28px 78px;
}

.hero-copy {
  position: relative;
  z-index: 5;
}

.eyebrow {
  display: inline-flex;
  margin: 0 0 18px;
  padding: 9px 14px;
  border: 1px solid rgba(7, 174, 220, .2);
  border-radius: 999px;
  color: #068fbc;
  background: rgba(255, 255, 255, .62);
  box-shadow: 0 12px 32px rgba(4, 163, 194, .1);
  font-size: 16px;
  font-weight: 900;
}

h1 {
  margin: 0;
  font-size: clamp(62px, 7.6vw, 112px);
  line-height: .92;
  font-weight: 900;
  letter-spacing: 0;
}

.subtitle {
  margin: 24px 0 0;
  color: #27302d;
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 900;
  line-height: 1.28;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.primary-btn,
.ghost-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 150px;
  height: 54px;
  border-radius: 999px;
  font-size: 18px;
  font-weight: 900;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.primary-btn {
  color: #fff;
  background: #080b0b;
  box-shadow: 0 18px 44px rgba(0, 0, 0, .2);
}

.ghost-btn {
  border: 1px solid rgba(8, 12, 12, .18);
  background: rgba(255, 255, 255, .7);
  backdrop-filter: blur(14px);
}

.primary-btn:hover,
.ghost-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 48px rgba(0, 0, 0, .18);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.hero-tags span {
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, .82);
  border-radius: 999px;
  color: #3d4b48;
  background: rgba(255, 255, 255, .55);
  font-size: 13px;
  font-weight: 800;
  box-shadow: 0 10px 26px rgba(58, 151, 146, .1);
}

.hero-stage {
  position: relative;
  min-height: min(760px, 78vh);
  perspective: 1300px;
  overflow: hidden;
}

.hero-slide {
  position: absolute;
  left: 50%;
  top: 50%;
  z-index: 5;
  width: min(420px, 48vw);
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 34px 52px rgba(33, 97, 92, .18));
}

.hero-slide::before {
  content: "";
  position: absolute;
  inset: 11% -10% 8%;
  z-index: -1;
  border-radius: 46px;
  background: linear-gradient(145deg, rgba(255, 255, 255, .6), rgba(81, 246, 220, .18));
  filter: blur(22px);
}

.hero-slide img,
.hero-side img,
.feature-card img,
.scene-grid img {
  display: block;
  width: 100%;
}

.hero-slide img {
  border-radius: 30px;
}

.hero-side {
  position: absolute;
  top: 52%;
  z-index: 2;
  width: min(288px, 30vw);
  opacity: .44;
  filter: saturate(.82) blur(.2px);
}

.side-left {
  left: -12px;
  transform: translateY(-50%) rotateY(48deg) rotateZ(-4deg) scale(.94);
  transform-origin: right center;
}

.side-right {
  right: -12px;
  transform: translateY(-50%) rotateY(-48deg) rotateZ(4deg) scale(.94);
  transform-origin: left center;
}

.is-changing .hero-slide {
  animation: popIn .52s ease both;
}

.is-changing .side-left {
  animation: sideInLeft .52s ease both;
}

.is-changing .side-right {
  animation: sideInRight .52s ease both;
}

.hero-arrow {
  position: absolute;
  top: 50%;
  z-index: 8;
  width: 48px;
  height: 48px;
  border: 1px solid rgba(255, 255, 255, .82);
  border-radius: 50%;
  background: rgba(255, 255, 255, .78);
  box-shadow: 0 16px 40px rgba(16, 67, 70, .16);
  cursor: pointer;
  backdrop-filter: blur(12px);
}

.hero-arrow::before {
  content: "";
  position: absolute;
  inset: 16px 14px;
  border-top: 3px solid #111;
  border-left: 3px solid #111;
}

.hero-arrow.left {
  left: 4px;
}

.hero-arrow.left::before {
  transform: rotate(-45deg);
}

.hero-arrow.right {
  right: 4px;
}

.hero-arrow.right::before {
  transform: rotate(135deg);
}

.floating-service {
  position: fixed;
  right: clamp(14px, 2.2vw, 34px);
  top: 48%;
  z-index: 35;
  display: grid;
  place-items: center;
  gap: 8px;
  width: 104px;
  min-height: 104px;
  border: 1px solid rgba(255, 255, 255, .84);
  border-radius: 26px;
  color: #fff;
  background: linear-gradient(160deg, #08bdf2, #16d5c0);
  box-shadow: 0 22px 54px rgba(0, 168, 210, .28);
  font-size: 17px;
  font-weight: 900;
  text-align: center;
}

.floating-service span {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 58% 55%, #12c4d8 0 5px, transparent 6px),
    radial-gradient(circle at 38% 48%, #12c4d8 0 8px, transparent 9px),
    #fff;
}

.feature-icons {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
  width: min(980px, 100%);
  margin: -38px auto 0;
  padding: 0 28px 62px;
}

.feature-icons div {
  display: grid;
  place-items: center;
  gap: 12px;
  min-height: 118px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: rgba(255, 255, 255, .62);
  box-shadow: 0 16px 46px rgba(49, 169, 178, .12);
  backdrop-filter: blur(18px);
}

.feature-icons div::before {
  content: "";
  width: 64px;
  height: 58px;
  clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%);
  background:
    radial-gradient(circle at 35% 34%, rgba(255, 255, 255, .9) 0 9px, transparent 10px),
    linear-gradient(145deg, rgba(212, 191, 255, .8), rgba(56, 213, 232, .82));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .72);
}

.feature-icons span {
  font-size: 22px;
  font-weight: 900;
}

.section {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: 84px 28px;
}

.section-head {
  margin-bottom: 34px;
  text-align: center;
}

.section-head p {
  margin: 0 0 10px;
  color: #09aeea;
  font-size: 14px;
  font-weight: 900;
  text-transform: uppercase;
}

h2 {
  margin: 0;
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: 0;
}

.feature-carousel {
  display: grid;
  grid-template-columns: repeat(4, minmax(260px, 1fr));
  gap: 22px;
  overflow-x: auto;
  padding: 4px 4px 24px;
  scroll-snap-type: x mandatory;
}

.feature-card {
  min-width: 260px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 32px;
  background: var(--glass);
  box-shadow: var(--shadow);
  scroll-snap-align: center;
  backdrop-filter: blur(20px);
}

.feature-card img {
  border-radius: 24px;
  aspect-ratio: 600 / 1068;
  object-fit: cover;
}

.feature-card h3,
.scene-grid h3,
.faq-list h3 {
  margin: 18px 8px 8px;
  font-size: 22px;
  line-height: 1.25;
  font-weight: 900;
}

.feature-card p,
.scene-grid p,
.faq-list p {
  margin: 0 8px 12px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.68;
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.scene-grid article {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 34px;
  background: rgba(255, 255, 255, .64);
  box-shadow: 0 24px 68px rgba(88, 80, 153, .13);
  backdrop-filter: blur(18px);
}

.scene-grid img {
  border-radius: 26px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  width: min(980px, 100%);
  margin: 0 auto;
  padding: 0 28px 44px;
}

.metrics div {
  min-height: 132px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 30px;
  background: rgba(255, 255, 255, .68);
  text-align: center;
  box-shadow: 0 18px 52px rgba(49, 169, 178, .13);
  backdrop-filter: blur(18px);
}

.metrics strong {
  display: block;
  color: #04aee8;
  font-size: 50px;
  line-height: 1;
}

.metrics span {
  display: block;
  margin-top: 10px;
  color: #222;
  font-size: 17px;
  font-weight: 800;
}

.faq {
  padding-top: 42px;
  padding-bottom: 108px;
}

.faq-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.faq-list article {
  min-height: 150px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 255, 255, .66);
  box-shadow: 0 18px 52px rgba(33, 96, 96, .1);
  backdrop-filter: blur(18px);
}

.download-bar {
  position: fixed;
  left: 50%;
  bottom: 20px;
  z-index: 45;
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  width: min(620px, calc(100% - 32px));
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, .92);
  border-radius: 24px;
  background: rgba(255, 255, 255, .9);
  box-shadow: 0 18px 60px rgba(0, 0, 0, .18);
  transform: translateX(-50%);
  backdrop-filter: blur(18px) saturate(1.2);
}

.app-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  object-fit: cover;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .74), 0 10px 24px rgba(0, 190, 170, .22);
}

.download-bar strong {
  display: block;
  font-size: 22px;
  line-height: 1.2;
}

.download-bar p {
  margin: 4px 0 0;
  color: #333;
  font-size: 15px;
}

.download-bar a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 120px;
  height: 48px;
  border-radius: 14px;
  background: #050607;
  color: #fff;
  font-size: 17px;
  font-weight: 900;
}

.download-page {
  min-height: 100vh;
  padding: 24px;
  display: grid;
  place-items: center;
}

.download-shell {
  width: min(760px, 100%);
}

.back-link {
  display: inline-flex;
  align-items: center;
  margin: 0 0 14px;
  padding: 10px 14px;
  border: 1px solid rgba(255, 255, 255, .86);
  border-radius: 999px;
  background: rgba(255, 255, 255, .62);
  color: #26302d;
  font-weight: 900;
  box-shadow: 0 12px 32px rgba(19, 91, 91, .09);
  backdrop-filter: blur(18px);
}

.download-card {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 6vw, 54px);
  border: 1px solid rgba(255, 255, 255, .9);
  border-radius: 34px;
  background: rgba(255, 255, 255, .72);
  box-shadow: 0 28px 90px rgba(34, 114, 114, .18);
  text-align: center;
  backdrop-filter: blur(24px) saturate(1.2);
}

.download-card::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto;
  height: 260px;
  background:
    radial-gradient(circle at 28% 24%, rgba(40, 240, 197, .34), transparent 36%),
    radial-gradient(circle at 72% 12%, rgba(255, 134, 198, .26), transparent 34%);
  pointer-events: none;
}

.download-icon {
  position: relative;
  width: 94px;
  height: 94px;
  border-radius: 25px;
  object-fit: cover;
  box-shadow: 0 18px 42px rgba(0, 190, 170, .24);
}

.download-card h1 {
  position: relative;
  margin-top: 12px;
  font-size: clamp(42px, 9vw, 72px);
}

.download-lead {
  position: relative;
  max-width: 560px;
  margin: 18px auto 26px;
  color: #35413e;
  font-size: clamp(18px, 4.3vw, 24px);
  line-height: 1.55;
  font-weight: 900;
}

.contact-panel {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0;
}

.contact-panel div {
  padding: 18px 14px;
  border: 1px solid rgba(255, 255, 255, .86);
  border-radius: 22px;
  background: rgba(255, 255, 255, .58);
  box-shadow: 0 12px 34px rgba(34, 114, 114, .08);
}

.contact-panel span {
  display: block;
  color: #66736f;
  font-size: 13px;
  font-weight: 900;
}

.contact-panel strong {
  display: block;
  margin-top: 8px;
  font-size: clamp(20px, 4vw, 28px);
  word-break: break-all;
}

.download-actions {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 160px;
  gap: 12px;
  margin-top: 22px;
}

.qq-group-btn,
.copy-btn,
.mini-copy {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  border: 0;
  border-radius: 18px;
  font: inherit;
  font-size: 17px;
  font-weight: 900;
  cursor: pointer;
}

.qq-group-btn {
  color: #fff;
  background: #080b0b;
  box-shadow: 0 18px 44px rgba(0, 0, 0, .18);
}

.copy-btn,
.mini-copy {
  color: #19201d;
  background: rgba(255, 255, 255, .82);
  box-shadow: inset 0 0 0 1px rgba(8, 12, 12, .08);
}

.download-tip {
  position: relative;
  margin: 18px auto 0;
  color: #66736f;
  font-size: 14px;
  line-height: 1.7;
}

.copy-row {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.mini-copy {
  min-height: 48px;
  font-size: 14px;
}

@keyframes popIn {
  from {
    opacity: .72;
    transform: translate(-50%, -50%) scale(.96);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

@keyframes sideInLeft {
  from {
    opacity: .16;
    transform: translate(-24px, -50%) rotateY(54deg) rotateZ(-5deg) scale(.9);
  }
}

@keyframes sideInRight {
  from {
    opacity: .16;
    transform: translate(24px, -50%) rotateY(-54deg) rotateZ(5deg) scale(.9);
  }
}

@media (max-width: 1040px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 28px;
    min-height: auto;
    padding-top: 52px;
    text-align: center;
  }

  .hero-copy {
    max-width: 680px;
    margin: 0 auto;
  }

  .hero-actions,
  .hero-tags {
    justify-content: center;
  }

  .hero-stage {
    min-height: 650px;
  }

  .hero-slide {
    width: min(380px, 64vw);
  }
}

@media (max-width: 900px) {
  .site-timer {
    width: calc(100% - 24px);
    font-size: 13px;
  }

  .site-header {
    top: 10px;
    width: calc(100% - 24px);
  }

  nav {
    font-size: 13px;
  }

  nav a {
    padding: 9px 11px;
  }

  .feature-icons {
    gap: 8px;
    margin-top: 0;
    padding: 0 14px 42px;
  }

  .feature-icons div {
    min-height: 86px;
    border-radius: 22px;
  }

  .feature-icons div::before {
    width: 50px;
    height: 46px;
  }

  .feature-icons span {
    font-size: 16px;
  }

  .section {
    padding: 62px 18px;
  }

  .feature-carousel {
    grid-template-columns: none;
    grid-auto-flow: column;
    grid-auto-columns: minmax(260px, 78vw);
  }

  .scene-grid,
  .metrics,
  .faq-list {
    grid-template-columns: 1fr;
  }

  .floating-service {
    right: 12px;
    width: 86px;
    min-height: 86px;
    border-radius: 22px;
    font-size: 14px;
  }

  .floating-service span {
    width: 38px;
    height: 38px;
  }
}

@media (max-width: 620px) {
  body {
    padding-bottom: 116px;
  }

  .download-page {
    padding: 16px;
  }

  .download-page {
    padding-bottom: 16px;
  }

  .site-timer {
    flex-direction: column;
    gap: 3px;
    border-radius: 22px;
  }

  body::after {
    top: 120px;
    font-size: 92px;
  }

  .brand {
    font-size: 22px;
  }

  nav a:first-child,
  nav a:nth-child(2) {
    display: none;
  }

  .hero {
    padding: 38px 16px 46px;
  }

  h1 {
    font-size: clamp(52px, 17vw, 78px);
  }

  .subtitle {
    font-size: 20px;
  }

  .hero-stage {
    min-height: 540px;
  }

  .hero-slide {
    width: min(340px, 76vw);
  }

  .hero-side {
    display: none;
  }

  .hero-arrow {
    top: 54%;
  }

  .feature-icons {
    grid-template-columns: repeat(5, 1fr);
    overflow-x: auto;
    justify-content: start;
  }

  .feature-icons div {
    min-width: 78px;
  }

  .floating-service {
    top: auto;
    right: 12px;
    bottom: 104px;
  }

  .download-bar {
    grid-template-columns: 52px minmax(0, 1fr) 92px;
    gap: 10px;
    bottom: 12px;
    padding: 10px;
    border-radius: 18px;
  }

  .app-icon {
    width: 52px;
    height: 52px;
    border-radius: 16px;
  }

  .download-bar strong {
    font-size: 19px;
  }

  .download-bar p {
    font-size: 13px;
  }

  .download-bar a {
    min-width: 92px;
    height: 44px;
    font-size: 15px;
  }

  .contact-panel,
  .download-actions,
  .copy-row {
    grid-template-columns: 1fr;
  }

  .download-card {
    border-radius: 28px;
  }
}