:root {
  --blue: #2198FF;
  --blue-2: #28C4EF;
  --dark: #303236;
  --text: #4B4F58;
  --muted: #6B7280;
  --page: #F2F7FC;
  --card: #FFFFFF;
  --line: rgba(22, 42, 72, .08);
  --footer: #0E2140;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --bottom-bar-h: 76px;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }
html { scroll-behavior: smooth; }
body {
  min-height: 100vh;
  padding-bottom: calc(var(--bottom-bar-h) + var(--safe-bottom));
  background: var(--page);
  color: var(--dark);
  font-family: "PingFang SC", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { border: 0; background: none; color: inherit; font: inherit; cursor: pointer; }
button,
.nav-btn,
.primary-btn,
.secondary-btn,
.platform-card,
.bb-btn,
.menu-btn {
  transition: opacity .2s ease, background-color .2s ease, box-shadow .2s ease, border-color .2s ease, transform .2s ease;
}
button:hover,
button:focus-visible,
.nav-btn:hover,
.nav-btn:focus-visible,
.primary-btn:hover,
.primary-btn:focus-visible,
.secondary-btn:hover,
.secondary-btn:focus-visible,
.platform-card:hover,
.platform-card:focus-visible,
.bb-btn:hover,
.bb-btn:focus-visible,
.menu-btn:hover,
.menu-btn:focus-visible {
  opacity: .7;
}
img { display: block; max-width: 100%; }
picture { display: contents; }

.page {
  overflow: hidden;
  background: #F2F7FC;
}

.shell {
  width: min(100% - 32px, 1200px);
  max-width: 1200px;
  margin: 0 auto;
}

.topnav {
  position: absolute;
  top: 0;
  left: 50%;
  z-index: 20;
  width: min(100% - 32px, 1200px);
  max-width: 1200px;
  transform: translateX(-50%);
  height: calc(var(--safe-top) + 66px);
  padding: var(--safe-top) 0 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: transparent;
  border-bottom: 0;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  box-shadow: none;
  transition: background-color .2s ease, box-shadow .2s ease;
}
.topnav::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: transparent;
  box-shadow: none;
  transition: background-color .2s ease, box-shadow .2s ease;
}
body.nav-stuck .topnav {
  position: fixed;
}
body.nav-stuck .topnav::before {
  left: 50%;
  right: auto;
  width: 100vw;
  transform: translateX(-50%);
  background: #fff;
  box-shadow: 0 8px 24px rgba(22, 42, 72, .08);
}

.brand {
  width: 120px;
  height: 36px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 24px;
  line-height: 1;
  font-weight: 900;
  letter-spacing: 0;
}
.brand img {
  width: 36px;
  height: 36px;
  border-radius: 0;
  background: transparent;
  object-fit: contain;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 34px;
  color: rgba(48, 50, 54, .82);
  font-size: 15px;
  font-weight: 700;
}

.nav-actions {
  display: none;
  align-items: center;
  gap: 12px;
}

.nav-btn {
  min-width: 120px;
  height: 36px;
  padding: 0 24px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
}
.nav-btn.outline {
  color: #1688FF;
  background: #fff;
  border: 1px solid #1688FF;
}
.nav-btn.fill {
  color: #fff;
  background: linear-gradient(90deg, #247BFF 0%, #22C3EE 100%);
}

.mobile-menu {
  position: relative;
  margin-left: auto;
}
.mobile-menu summary { list-style: none; }
.mobile-menu summary::-webkit-details-marker { display: none; }
.menu-btn {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(48, 50, 54, .16);
  border-radius: 999px;
  background: rgba(255,255,255,.82);
}
.mobile-panel {
  position: absolute;
  right: 0;
  top: 52px;
  width: min(280px, calc(100vw - 32px));
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,.98);
  box-shadow: 0 24px 60px rgba(22, 42, 72, .16);
}
.mobile-panel a {
  min-height: 44px;
  padding: 10px 12px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: #303236;
  font-size: 14px;
  font-weight: 800;
}

.hero {
  position: relative;
  height: 900px;
  min-height: 900px;
  padding: 0;
  overflow: hidden;
  background: url("../images/Hero.png") center top / cover no-repeat;
  background: image-set(
    url("../images/Hero.webp") type("image/webp"),
    url("../images/Hero.png") type("image/png")
  ) center top / cover no-repeat;
}
.hero::before {
  display: none;
}

.hero-inner {
  position: relative;
  height: 100%;
}
.hero-copy {
  position: absolute;
  top: 235px;
  left: 0;
  z-index: 2;
}
.hero-chip {
  width: max-content;
  max-width: 100%;
  padding: 8px 18px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #3E424A;
  background: rgba(255,255,255,.78);
  font-size: 14px;
  font-weight: 700;
}
.hero-chip::before {
  content: "✣";
  width: 14px;
  height: 14px;
  background: url("../images/Icon4.png") center / contain no-repeat;
  color: transparent;
  font-size: 0;
}
.hero-title {
  margin-top: 28px;
  max-width: 620px;
  color: #303236;
  font-size: clamp(48px, 5.4vw, 72px);
  line-height: 1.28;
  letter-spacing: 0;
  font-weight: 950;
}
.hero-desc {
  max-width: 650px;
  margin-top: 24px;
  color: rgba(48, 50, 54, .72);
  font-size: 18px;
  line-height: 1.75;
  font-weight: 500;
}
.hero-actions,
.download-actions {
  margin-top: 38px;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}
.primary-btn,
.secondary-btn {
  min-width: 150px;
  min-height: 54px;
  padding: 14px 28px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 900;
  transition: transform .15s ease;
}
.primary-btn:active,
.secondary-btn:active { transform: scale(.98); }
.primary-btn {
  color: #1688FF;
  background: #fff;
  border: 1.5px solid #1688FF;
}
.secondary-btn {
  color: #fff;
  background: linear-gradient(90deg, #2577FF 0%, #25C5EC 100%);
}
.hero-art {
  position: absolute;
  top: 50px;
  right: -22px;
  width: 520px;
  min-height: 720px;
}
.hero-phone {
  width: clamp(420px, 34vw, 520px);
  max-height: 760px;
  object-fit: contain;
  filter: drop-shadow(0 24px 44px rgba(0, 61, 120, .15));
}
.hero.uses-bg .hero-art {
  visibility: visible;
}
.hero-sticker {
  position: absolute;
  top: 28px;
  right: 0;
  width: 205px;
  transform: rotate(12deg);
  filter: drop-shadow(0 14px 20px rgba(34, 63, 112, .12));
}

.intro {
  width: 100%;
  max-width: none;
  padding: 100px 0;
  background: #F7FAFF;
  text-align: center;
}
.intro h2 {
  color: #333;
  font-size: 48px;
  line-height: 1.4;
  font-weight: 700;
}
.intro p {
  margin: 16px auto 0;
  color: #555;
  font-size: 18px;
  line-height: 1.4;
}

.feature-grid {
  width: min(100% - 32px, 1200px);
  margin: 64px auto 0;
  display: grid;
  grid-template-columns: repeat(4, 284px);
  gap: 22px;
  justify-content: center;
}
.feature-card {
  width: 284px;
  min-height: 186px;
  padding: 32px 28px;
  border-radius: 24px;
  background: #fff;
  text-align: left;
}
.feature-head {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 48px;
}
.feature-card img {
  width: 48px;
  height: 48px;
  flex: 0 0 48px;
  object-fit: contain;
}
.feature-card h3 {
  color: #333;
  font-size: 22px;
  line-height: 1.4;
  font-weight: 600;
}
.feature-card p {
  margin-top: 28px;
  color: #555;
  font-size: 16px;
  line-height: 1.4;
}

.feature-detail {
  padding: 50px 0;
}
.groupchat-section {
  position: relative;
  width: 100%;
  max-width: none;
  height: 892px;
  margin-bottom: 0;
  padding: 50px 0;
  background: #fff;
}
.groupchat-card {
  position: relative;
  width: min(100% - 32px, 1200px);
  height: 792px;
  margin: 0 auto;
  border-radius: 48px;
  overflow: hidden;
  background: linear-gradient(135deg, #EAF4FF 0%, #F5FAFF 50%, #E6F8FC 100%);
}
.groupchat-card .detail-visual {
  position: absolute;
  left: 100px;
  top: 16px;
  width: 418px;
  min-height: 760px;
  display: block;
}
.groupchat-card .detail-visual .phone-asset.heroic {
  width: 418px;
  height: 760px;
  max-height: none;
  object-fit: contain;
  filter: none;
}
.groupchat-card .detail-text {
  position: absolute;
  left: 600px;
  top: 174px;
  z-index: 1;
  width: 500px;
  height: 443px;
}
.detail-card {
  position: relative;
  min-height: 792px;
  padding: 70px 96px;
  border-radius: 44px;
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1fr);
  align-items: center;
  gap: 60px;
  overflow: hidden;
  background:
    radial-gradient(circle at 22% 42%, rgba(185, 232, 255, .38), transparent 34%),
    linear-gradient(180deg, #F8FCFF 0%, #EFFAFF 100%);
}
.detail-card.plain {
  min-height: 807px;
  padding: 64px 96px;
  border-radius: 0;
  background:
    radial-gradient(circle at 18% 50%, rgba(183, 255, 247, .42), transparent 28%),
    radial-gradient(circle at 88% 82%, rgba(194, 180, 255, .36), transparent 24%),
    #fff;
}
.detail-card.reverse {
  grid-template-columns: minmax(0, 1fr) minmax(0, .9fr);
}
.detail-card.dynamic-card {
  min-height: 807px;
}
.detail-visual {
  position: relative;
  min-height: 560px;
  display: grid;
  place-items: center;
}
.detail-visual img {
  max-height: 650px;
  object-fit: contain;
}
.detail-visual .phone-asset {
  width: min(100%, 430px);
  max-height: 680px;
}
.detail-visual .phone-asset.heroic {
  width: min(100%, 510px);
  max-height: 700px;
}
.detail-visual .wide-asset {
  width: min(100%, 560px);
  max-height: none;
}
.detail-visual .asset-phone-wide {
  width: min(100%, 544px);
  max-height: none;
}
.detail-text {
  position: relative;
  z-index: 1;
}
.detail-no {
  color: #1E69FF;
  font-size: 82px;
  line-height: 1;
  font-weight: 950;
}
.groupchat-card .detail-no {
  color: #1565FF;
  font-size: 84px;
  line-height: 1.4;
  font-weight: 700;
}
.detail-title {
  margin-top: 46px;
  color: #303236;
  font-size: 46px;
  line-height: 1.2;
  font-weight: 950;
}
.groupchat-card .detail-title {
  margin-top: 0;
  color: #333;
  font-size: 48px;
  line-height: 1.4;
  font-weight: 700;
}
.detail-desc {
  max-width: 570px;
  margin-top: 24px;
  color: rgba(48,50,54,.72);
  font-size: 18px;
  line-height: 1.75;
}
.groupchat-card .detail-desc {
  max-width: 500px;
  margin-top: 0;
  color: #555;
  font-size: 18px;
  line-height: 1.4;
}
.checks {
  margin-top: 28px;
  display: grid;
  gap: 14px;
  list-style: none;
  color: rgba(48,50,54,.76);
  font-size: 17px;
  line-height: 1.45;
}
.groupchat-card .checks {
  margin-top: 24px;
  gap: 0;
  color: #555;
  font-size: 16px;
  line-height: 1.4;
}
.checks li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.groupchat-card .checks li {
  min-height: 36px;
  align-items: center;
  gap: 12px;
}
.checks li::before {
  content: "";
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  background: url("../images/Vector.png") center / contain no-repeat;
}
.detail-sticker {
  position: absolute;
  width: min(26%, 260px);
  object-fit: contain;
}
.groupchat-card .detail-sticker {
  width: 272px;
}
.sticker-pink { top: 28px; right: 80px; transform: rotate(-8deg); }
.groupchat-card .sticker-pink {
  top: 0;
  right: 100px;
  transform: none;
}
.voice-section {
  position: relative;
  width: 100%;
  max-width: none;
  height: 921px;
  margin-top: 0;
  padding-top: 100px;
  background: #fff;
  overflow: visible;
}
.voice-section .voice-glow-left,
.voice-section .voice-glow-right {
  position: absolute;
  pointer-events: none;
  z-index: 0;
  border-radius: 999px;
}
.voice-section .voice-glow-left {
  left: 88px;
  top: 32px;
  width: 607px;
  height: 607px;
  background: radial-gradient(circle, rgba(177, 255, 249, .58) 0%, rgba(208, 255, 252, .35) 34%, rgba(255, 255, 255, 0) 70%);
}
.voice-section .voice-glow-right {
  right: 56px;
  bottom: -116px;
  width: 567px;
  height: 568px;
  background: radial-gradient(circle, rgba(196, 184, 255, .48) 0%, rgba(224, 218, 255, .28) 36%, rgba(255, 255, 255, 0) 70%);
}
.voice-content {
  position: relative;
  z-index: 1;
  width: min(100% - 32px, 1200px);
  height: 771px;
  margin: 0 auto;
}
.voice-section .detail-text {
  position: absolute;
  left: 97px;
  top: 166px;
  width: 544px;
  height: 439px;
  z-index: 2;
}
.voice-section .detail-no {
  color: #1565FF;
  font-size: 84px;
  line-height: 1.4;
  font-weight: 700;
}
.voice-section .detail-title {
  margin-top: 0;
  color: #333;
  font-size: 48px;
  line-height: 1.4;
  font-weight: 700;
}
.voice-section .detail-desc {
  max-width: 544px;
  margin-top: 0;
  color: #555;
  font-size: 18px;
  line-height: 1.4;
}
.voice-section .checks {
  margin-top: 24px;
  gap: 0;
  color: #555;
  font-size: 16px;
  line-height: 1.4;
}
.voice-section .checks li {
  min-height: 36px;
  align-items: center;
  gap: 12px;
}
.voice-sticker {
  position: absolute;
  left: 359px;
  top: 20px;
  z-index: 3;
  width: 216px;
  height: 216px;
  object-fit: contain;
}
.voice-visual {
  position: absolute;
  left: 578px;
  top: 0;
  z-index: 2;
  width: 462px;
  height: 771px;
  overflow: visible;
}
.voice-visual .phone-asset.heroic {
  position: absolute;
  left: 63px;
  top: 0;
  width: 416px;
  height: 771px;
  max-height: none;
  object-fit: contain;
}
.sticker-blue { top: 60px; left: 44%; transform: translateX(-50%) rotate(6deg); }
.sticker-purple { top: 28px; left: 38%; transform: translateX(-50%); }
.sticker-green { top: 46px; right: 100px; transform: rotate(14deg); }
.dynamic-float {
  position: absolute;
  left: 24px;
  bottom: 34px;
  width: min(42%, 430px);
  filter: drop-shadow(0 24px 46px rgba(32, 70, 140, .14));
}

.membership {
  position: relative;
  height: 952px;
  margin: 0;
  overflow: hidden;
  color: #fff;
  background: url("../images/Membership.png") center / cover no-repeat;
  background: image-set(
    url("../images/Membership.webp") type("image/webp"),
    url("../images/Membership.png") type("image/png")
  ) center / cover no-repeat;
}
.voice-section + .membership {
  margin-top: 0;
}
.membership::before,
.membership::after {
  content: "";
  position: absolute;
  pointer-events: none;
}
.membership::before {
  left: 750px;
  top: 0;
  width: 420px;
  height: 420px;
  opacity: .65;
  background: radial-gradient(circle, rgba(42, 92, 160, .55) 0%, rgba(42, 92, 160, 0) 70%);
}
.membership::after {
  left: 1429px;
  top: -102px;
  width: 602px;
  height: 602px;
  border-radius: 999px;
  background: rgba(40, 33, 95, .72);
}
.membership-inner {
  position: relative;
  z-index: 1;
  width: min(100% - 32px, 1200px);
  height: 771px;
  margin: 91px auto 0;
  display: block;
}
.membership-phone {
  position: absolute;
  left: 0;
  top: 0;
  width: 495px;
  height: 771px;
}
.membership-phone img {
  width: 495px;
  height: 771px;
  object-fit: contain;
  filter: none;
}
.membership-copy {
  position: absolute;
  left: 555px;
  top: 144px;
  width: 615px;
  height: 483px;
  padding-top: 0;
}
.membership-sticker {
  position: absolute;
  top: -187px;
  right: 1px;
  width: 359px;
  height: 359px;
  object-fit: contain;
  transform: none;
}
.membership-no {
  color: #F4D1A4;
  font-size: 84px;
  line-height: 1.4;
  font-weight: 700;
}
.membership-title {
  margin-top: 0;
  color: #fff;
  font-size: 48px;
  line-height: 1.4;
  font-weight: 700;
  white-space: nowrap;
}
.membership-desc {
  max-width: 544px;
  margin-top: 0;
  color: #fff;
  font-size: 18px;
  line-height: 1.4;
}
.membership-perks {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(3, 190px);
  gap: 22px;
}
.membership-perk {
  min-height: 180px;
  padding: 21px;
  border: 1px solid rgba(255, 255, 255, .72);
  border-radius: 14px;
  background: rgba(255,255,255,.06);
  backdrop-filter: none;
}
.membership-perk-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(255, 255, 255, .9);
}
.membership-perk-icon img {
  width: 24px;
  height: 24px;
  object-fit: contain;
}
.membership-perk h3 {
  margin-top: 18px;
  color: #fff;
  font-size: 18px;
  line-height: 1.4;
  font-weight: 400;
}
.membership-perk p {
  margin-top: 0;
  color: #fff;
  font-size: 16px;
  line-height: 1.4;
}

.moments-section {
  position: relative;
  width: 100%;
  max-width: none;
  height: 1050px;
  overflow: hidden;
  background: #F5FAFF;
}
.moments-inner {
  position: relative;
  width: min(100% - 32px, 1200px);
  height: 770px;
  margin: 140px auto 0;
}
.moments-copy {
  position: absolute;
  left: 20px;
  top: 30px;
  width: 544px;
  height: 711px;
}
.moments-no {
  color: #1565FF;
  font-size: 84px;
  line-height: 1.4;
  font-weight: 700;
}
.moments-title {
  margin-top: 0;
  color: #333;
  font-size: 48px;
  line-height: 1.4;
  font-weight: 700;
}
.moments-desc {
  width: 544px;
  margin-top: 0;
  color: #555;
  font-size: 18px;
  line-height: 1.4;
}
.moments-checks {
  margin-top: 24px;
  display: grid;
  gap: 0;
  list-style: none;
  color: #555;
  font-size: 18px;
  line-height: 1.4;
}
.moments-checks li {
  min-height: 36px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.moments-checks li::before {
  content: "";
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  background: url("../images/Vector.png") center / contain no-repeat;
}
.moments-feed {
  position: absolute;
  left: 0;
  top: 451px;
  z-index: 2;
  width: 544px;
  height: 260px;
  object-fit: contain;
  filter: drop-shadow(0 24px 42px rgba(44, 91, 154, .12));
}
.moments-sticker {
  position: absolute;
  left: 448px;
  top: -140px;
  z-index: 3;
  width: 293px;
  height: 293px;
  object-fit: contain;
}
.moments-phone {
  position: absolute;
  left: 688px;
  top: 0;
  width: 492px;
  height: 770px;
}
.moments-phone img {
  width: 492px;
  height: 770px;
  object-fit: contain;
  filter: drop-shadow(0 20px 32px rgba(31, 45, 70, .14));
}

.assets-section {
  position: relative;
  width: 100%;
  max-width: none;
  height: 827px;
  overflow: hidden;
  background: #fff;
}
.assets-card {
  position: relative;
  width: min(100% - 32px, 1200px);
  height: 727px;
  margin: 50px auto 0;
  overflow: visible;
  border-radius: 48px;
  background: linear-gradient(135deg, #EAF4FF 0%, #F5FAFF 50%, #E6F8FC 100%);
}
.assets-phone {
  position: absolute;
  left: 100px;
  top: 36px;
  width: 416px;
  height: 695px;
  overflow: visible;
}
.assets-phone img { 
  position: absolute;
  left: 0;
  top: -76px;
  width: 416px;
  height: 771px;
  object-fit: contain;
  filter: drop-shadow(0 20px 32px rgba(31, 45, 70, .14));
}
.assets-copy {
  position: absolute;
  left: 600px;
  top: 98px;
  z-index: 2;
  width: 500px;
  height: 531px;
}
.assets-no {
  color: #1565FF;
  font-size: 84px;
  line-height: 1.4;
  font-weight: 700;
}
.assets-title {
  margin-top: 0;
  color: #333;
  font-size: 48px;
  line-height: 1.4;
  font-weight: 700;
}
.assets-desc {
  width: 283px;
  margin-top: 0;
  color: #555;
  font-size: 18px;
  line-height: 1.4;
}
.assets-checks {
  margin-top: 24px;
  display: grid;
  gap: 0;
  list-style: none;
  color: #555;
  font-size: 16px;
  line-height: 1.4;
}
.assets-checks li {
  min-height: 36px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.assets-checks li::before {
  content: "";
  flex: 0 0 20px;
  width: 20px;
  height: 20px;
  background: url("../images/Vector.png") center / contain no-repeat;
}
.assets-sticker {
  position: absolute;
  right: 31px;
  top: -45px;
  z-index: 3;
  width: 319px;
  height: 319px;
  object-fit: contain;
}
.download-section {
  width: 100%;
  max-width: none;
  height: 532px;
  padding: 100px 0 60px;
  text-align: center;
  background: #F5FAFF;
}
.download-section h2 {
  color: #303236;
  font-size: 48px;
  line-height: 1.4;
  font-weight: 700;
}
.download-section p {
  margin-top: 16px;
  color: #555;
  font-size: 18px;
  line-height: 1.4;
}
.platform-grid {
  width: 900px;
  margin: 64px auto 0;
  display: grid;
  grid-template-columns: repeat(4, 186px);
  gap: 52px;
}
.platform-card {
  position: relative;
  width: 186px;
  height: 200px;
  padding: 48px 20px 46px;
  border-radius: 24px;
  border: 1px solid transparent;
  background: #fff;
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 16px;
  color: #1565FF;
  transition: border-color .18s ease, border-radius .18s ease;
}
.platform-card:hover,
.platform-card:focus-visible {
  border-color: #1565FF;
  border-radius: 28px;
}
.platform-default {
  display: grid;
  justify-items: center;
  gap: 16px;
}
.platform-hover {
  display: none;
}
.platform-card:hover .platform-default,
.platform-card:focus-visible .platform-default {
  display: none;
}
.platform-card:hover .platform-hover,
.platform-card:focus-visible .platform-hover {
  display: grid;
}
.platform-card img {
  width: 66px;
  height: 66px;
  object-fit: contain;
}
.platform-card strong {
  color: #303236;
  font-size: 18px;
  font-weight: 500;
}
.platform-macos-actions {
  width: 154px;
  height: 92px;
  align-content: space-between;
}
.platform-macos-actions button {
  width: 154px;
  height: 38px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: #1565FF;
  background: transparent;
  font-size: 16px;
  line-height: 1.4;
  cursor: pointer;
}
.platform-macos-actions button:hover,
.platform-macos-actions button:focus-visible {
  border-color: #1565FF;
}
.platform-download-now {
  width: 64px;
  height: 78px;
  align-content: space-between;
  justify-items: center;
  color: #1565FF;
  font-size: 16px;
  line-height: 1.4;
}
.download-icon {
  width: 40px;
  height: 40px;
  background: url("../images/Frame.png") center / contain no-repeat;
}
.platform-qr {
  width: 126px;
  height: 156px;
  justify-items: center;
  align-content: space-between;
  color: #1565FF;
  font-size: 16px;
  line-height: 1.4;
}
.platform-qr img {
  width: 126px;
  height: 126px;
  object-fit: contain;
}

.wechat-hint {
  display: none;
  max-width: 620px;
  margin: 0 auto 20px;
  padding: 12px 14px;
  border-radius: 14px;
  color: #92400E;
  background: #FFEDD5;
  border: 1px solid #F4B942;
  font-size: 13px;
}
.wechat-hint.show { display: block; }

.news-section {
  width: 100%;
  padding: 96px 16px 100px;
  background: #fff;
}
.news {
  width: min(100%, 1000px);
  margin: 0 auto;
}
.news-title {
  color: #303236;
  font-size: 48px;
  line-height: 1.4;
  font-weight: 700;
  text-align: center;
}
.news-desc {
  max-width: 760px;
  margin: 16px auto 0;
  color: #555;
  font-size: 18px;
  line-height: 1.7;
  text-align: center;
}
.news-list {
  margin-top: 48px;
  padding: 0 36px;
  overflow: hidden;
  list-style: none;
  border: 1px solid rgba(33, 152, 255, .12);
  border-radius: 28px;
  background: #F5FAFF;
  box-shadow: 0 18px 48px rgba(22, 42, 72, .07);
}
.news-item {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border-bottom: 1px solid rgba(22, 42, 72, .08);
}
.news-item:last-child {
  border-bottom: 0;
}
.news-link {
  flex: 1;
  color: #303236;
  font-size: 17px;
  line-height: 1.6;
  font-weight: 600;
  transition: color .2s ease;
}
.news-link:hover,
.news-link:focus-visible {
  color: #1565FF;
}
.news-time {
  flex: 0 0 auto;
  color: #7B8798;
  font-size: 14px;
  line-height: 1.4;
  white-space: nowrap;
}
.news-more {
  margin-top: 32px;
  text-align: center;
}
.news-more a {
  min-width: 160px;
  height: 46px;
  padding: 0 28px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: linear-gradient(90deg, var(--blue), var(--blue-2));
  box-shadow: 0 10px 24px rgba(33, 152, 255, .22);
  font-size: 15px;
  font-weight: 700;
  transition: opacity .2s ease, box-shadow .2s ease, transform .2s ease;
}
.news-more a:hover,
.news-more a:focus-visible {
  opacity: .82;
  box-shadow: 0 12px 28px rgba(33, 152, 255, .28);
  transform: translateY(-1px);
}

.site-footer-design {
  height: 154px;
  padding: 0;
  color: #777;
  background: #F5FAFF;
  text-align: center;
}
.footer-legal-row {
  width: max-content;
  max-width: calc(100% - 32px);
  height: 22px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  color: #555;
  font-size: 16px;
  line-height: 1.4;
}
.footer-legal-row a {
  color: #555;
  text-decoration: none;
  text-underline-offset: 3px;
}
.footer-legal-row a:hover {
  text-decoration: underline;
}
.footer-separator {
  width: 1px;
  height: 14px;
  background: #555;
}
.footer-meta {
  width: 460px;
  margin: 20px auto 0;
  color: #777;
  font-size: 16px;
  line-height: 1.4;
}
.footer-copyright {
  height: 22px;
}
.footer-records {
  height: 22px;
  margin-top: 8px;
  display: flex;
  justify-content: center;
  gap: 20px;
}
.footer-records[hidden] {
  display: none;
}
.footer-records a {
  color: #777;
  text-decoration: none;
  text-underline-offset: 3px;
}
.footer-records a:hover {
  text-decoration: underline;
}

.bottom-bar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  display: flex;
  gap: 8px;
  padding: 12px 14px calc(12px + var(--safe-bottom));
  background: rgba(255,255,255,.94);
  border-top: 1px solid rgba(22,42,72,.08);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
}
.bb-btn {
  flex: 1;
  min-height: 48px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: #fff;
  font-size: 15px;
  font-weight: 900;
}
.bb-download { background: #fff; color: #1688FF; border: 1px solid #1688FF; }
.bb-recharge { background: linear-gradient(90deg, #2577FF, #25C5EC); }

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--bottom-bar-h) + var(--safe-bottom) + 16px);
  z-index: 100;
  padding: 12px 18px;
  border-radius: 999px;
  color: #fff;
  background: rgba(16,17,22,.94);
  font-size: 13px;
  opacity: 0;
  transform: translateX(-50%) translateY(18px);
  transition: opacity .25s ease, transform .25s ease;
  pointer-events: none;
  white-space: nowrap;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (min-width: 900px) {
  body { padding-bottom: 0; }
  .nav-actions { display: flex; }
  .mobile-menu { display: none; }
  .hero-inner { grid-template-columns: minmax(0, 1fr) 520px; }
  .bottom-bar { display: none; }
  .toast { bottom: 32px; }
}

@media (max-width: 899px) {
  .shell,
  .topnav {
    width: min(100% - 32px, 430px);
  }
  .topnav {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    height: calc(var(--safe-top) + 66px);
    padding-top: var(--safe-top);
  }
  body.nav-stuck .topnav {
    position: fixed;
  }
  body.nav-stuck .topnav::before {
    background: rgba(255, 255, 255, .9);
  }
  .brand {
    font-size: 18px;
  }
  .brand img {
    width: 32px;
    height: 32px;
  }
  .hero {
    height: auto;
    min-height: 760px;
    padding: 0 0 42px;
    background-size: auto 760px;
    background-position: center top;
  }
  .hero-inner {
    height: auto;
    min-height: 720px;
    display: block;
  }
  .hero-copy {
    position: relative;
    top: auto;
    left: auto;
    padding-top: 54px;
  }
  .hero-title {
    margin-top: 24px;
    font-size: clamp(42px, 12vw, 56px);
    line-height: 1.18;
  }
  .hero-desc {
    font-size: 15px;
  }
  .hero-actions { display: none; }
  .hero-art {
    position: relative;
    top: auto;
    right: auto;
    width: 100%;
    min-height: 430px;
    margin-top: 28px;
    display: grid;
    place-items: center;
  }
  .hero-phone {
    width: min(100%, 330px);
    max-height: 480px;
  }
  .hero-sticker {
    width: 120px;
    top: 16px;
    right: 18px;
  }
  .intro {
    padding: 56px 0;
  }
  .intro h2 {
    width: min(100% - 32px, 430px);
    margin: 0 auto;
    font-size: 30px;
    line-height: 1.32;
  }
  .intro > p {
    width: min(100% - 32px, 430px);
    margin-top: 12px;
    font-size: 15px;
  }
  .feature-grid {
    width: min(100% - 32px, 430px);
    margin-top: 32px;
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .feature-card {
    width: 100%;
    min-height: auto;
    padding: 24px;
  }
  .feature-head {
    gap: 10px;
  }
  .feature-card img {
    width: 44px;
    height: 44px;
    flex-basis: 44px;
  }
  .feature-card h3 {
    font-size: 20px;
  }
  .feature-card p {
    margin-top: 18px;
  }
  .feature-detail {
    padding: 20px 0;
  }
  .groupchat-section {
    height: auto;
    margin-bottom: 0;
    padding: 32px 0;
  }
  .groupchat-card {
    width: min(100% - 32px, 430px);
    height: auto;
    min-height: 0;
    padding: 32px 22px;
    border-radius: 28px;
  }
  .groupchat-card .detail-sticker {
    width: 118px;
  }
  .groupchat-card .sticker-pink {
    top: 18px;
    right: 18px;
  }
  .groupchat-card .detail-visual,
  .groupchat-card .detail-text {
    position: relative;
    left: auto;
    top: auto;
    width: 100%;
  }
  .groupchat-card .detail-visual {
    min-height: 0;
    display: flex;
    justify-content: center;
    padding-top: 84px;
  }
  .groupchat-card .detail-visual .phone-asset.heroic {
    width: min(100%, 300px);
  }
  .groupchat-card .detail-text {
    margin-top: 28px;
  }
  .groupchat-card .detail-no {
    font-size: 54px;
    line-height: 1;
  }
  .groupchat-card .detail-title {
    margin-top: 20px;
    font-size: 30px;
    line-height: 1.3;
  }
  .groupchat-card .detail-desc {
    margin-top: 14px;
    font-size: 15px;
  }
  .groupchat-card .checks {
    margin-top: 18px;
    font-size: 14px;
  }
  .groupchat-card .checks li {
    min-height: 32px;
    align-items: flex-start;
  }
  .voice-section {
    height: auto;
    min-height: 860px;
    margin-top: 0;
    padding: 32px 0;
  }
  .voice-section .voice-glow-left {
    left: -180px;
    top: 0;
    width: 420px;
    height: 420px;
  }
  .voice-section .voice-glow-right {
    right: -170px;
    bottom: -110px;
    width: 470px;
    height: 470px;
  }
  .voice-content {
    width: min(100% - 32px, 430px);
    height: auto;
    margin: 0 auto;
    padding: 0;
  }
  .voice-sticker {
    left: 52%;
    top: 0;
    width: 122px;
    height: 122px;
  }
  .voice-section .detail-text,
  .voice-visual {
    position: relative;
    left: auto;
    top: auto;
    width: 100%;
    height: auto;
  }
  .voice-section .detail-text {
    padding-top: 118px;
  }
  .voice-section .detail-no {
    font-size: 54px;
    line-height: 1;
  }
  .voice-section .detail-title {
    margin-top: 20px;
    font-size: 30px;
    line-height: 1.3;
  }
  .voice-section .detail-desc {
    margin-top: 14px;
    font-size: 15px;
  }
  .voice-section .checks {
    margin-top: 18px;
    font-size: 14px;
  }
  .voice-section .checks li {
    min-height: 32px;
    align-items: flex-start;
  }
  .voice-visual {
    min-height: 460px;
    margin-top: 26px;
  }
  .voice-visual .phone-asset.heroic {
    left: 50%;
    top: 0;
    width: min(100%, 290px);
    height: auto;
    transform: translateX(-50%);
  }
  .detail-card,
  .detail-card.reverse {
    min-height: 0;
    padding: 30px 20px;
    border-radius: 28px;
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .detail-card.plain {
    min-height: 0;
    padding: 30px 20px;
    border-radius: 28px;
  }
  .detail-card.dynamic-card {
    min-height: 0;
  }
  .detail-card.reverse .detail-text { order: 1; }
  .detail-card.reverse .detail-visual { order: 2; }
  .detail-visual {
    min-height: 390px;
  }
  .detail-visual img {
    max-height: 460px;
  }
  .detail-visual .phone-asset,
  .detail-visual .phone-asset.heroic,
  .detail-visual .wide-asset {
    width: min(100%, 330px);
    max-height: 460px;
  }
  .detail-no {
    font-size: 52px;
  }
  .detail-title {
    margin-top: 22px;
    font-size: 32px;
  }
  .detail-desc,
  .checks {
    font-size: 14px;
  }
  .detail-sticker {
    width: 110px;
  }
  .sticker-pink,
  .sticker-blue,
  .sticker-purple,
  .sticker-green {
    top: 18px;
    right: 18px;
    left: auto;
    transform: none;
  }
  .dynamic-float {
    position: relative;
    left: auto;
    bottom: auto;
    width: 100%;
    margin-top: 14px;
  }
  .membership {
    height: auto;
    min-height: 920px;
    margin: 0;
    padding: 48px 0;
    background-position: center;
  }
  .membership-inner {
    width: min(100% - 32px, 430px);
    height: auto;
    margin: 0 auto;
    display: block;
  }
  .membership-phone {
    position: relative;
    left: auto;
    top: auto;
    width: 100%;
    height: auto;
    display: flex;
    justify-content: center;
  }
  .membership-phone img {
    width: min(100%, 300px);
    height: auto;
  }
  .membership-copy {
    position: relative;
    left: auto;
    top: auto;
    width: 100%;
    height: auto;
    margin-top: 28px;
    padding-top: 0;
  }
  .membership-sticker {
    top: -358px;
    right: 0;
    width: 128px;
    height: 128px;
  }
  .membership-no {
    font-size: 52px;
    line-height: 1;
  }
  .membership-title {
    margin-top: 22px;
    font-size: clamp(27px, 8.4vw, 32px);
    line-height: 1.25;
    white-space: normal;
    overflow-wrap: break-word;
  }
  .membership-desc {
    font-size: 14px;
    line-height: 1.55;
  }
  .membership-perks {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .membership-perk {
    min-height: 0;
    padding: 18px;
  }
  .membership-perk h3 {
    margin-top: 16px;
  }
  .moments-section {
    height: auto;
    min-height: 940px;
    padding: 48px 0;
  }
  .moments-inner {
    width: min(100% - 32px, 430px);
    height: auto;
    margin: 0 auto;
  }
  .moments-copy {
    position: relative;
    left: auto;
    top: auto;
    width: 100%;
    height: auto;
    padding-top: 86px;
  }
  .moments-no {
    font-size: 52px;
    line-height: 1;
  }
  .moments-title {
    margin-top: 22px;
    font-size: 30px;
    line-height: 1.3;
  }
  .moments-desc {
    width: 100%;
    margin-top: 14px;
    font-size: 14px;
    line-height: 1.55;
  }
  .moments-checks {
    margin-top: 18px;
    font-size: 14px;
  }
  .moments-checks li {
    min-height: 32px;
    align-items: flex-start;
  }
  .moments-sticker {
    left: auto;
    right: 10px;
    top: -32px;
    width: 128px;
    height: 128px;
  }
  .moments-feed {
    position: relative;
    left: 50%;
    top: auto;
    width: min(100%, 358px);
    height: auto;
    margin-top: 28px;
    transform: translateX(-50%);
  }
  .moments-phone {
    position: relative;
    left: auto;
    top: auto;
    width: 100%;
    height: auto;
    margin-top: 28px;
    display: flex;
    justify-content: center;
  }
  .moments-phone img {
    width: min(100%, 300px);
    height: auto;
  }
  .assets-section {
    height: auto;
    min-height: 900px;
    padding: 32px 0;
  }
  .assets-card {
    width: min(100% - 32px, 430px);
    height: auto;
    min-height: 0;
    margin: 0 auto;
    padding: 32px 22px;
    border-radius: 28px;
    overflow: hidden;
  }
  .assets-phone,
  .assets-copy {
    position: relative;
    left: auto;
    top: auto;
    width: 100%;
    height: auto;
  }
  .assets-phone {
    min-height: 520px;
    display: flex;
    justify-content: center;
  }
  .assets-phone img {
    position: relative;
    left: auto;
    top: auto;
    width: min(100%, 300px);
    height: auto;
  }
  .assets-copy {
    margin-top: 28px;
  }
  .assets-sticker {
    right: 18px;
    top: 18px;
    width: 128px;
    height: 128px;
  }
  .assets-no {
    font-size: 52px;
    line-height: 1;
  }
  .assets-title {
    margin-top: 22px;
    font-size: 30px;
    line-height: 1.3;
  }
  .assets-desc {
    width: 100%;
    margin-top: 14px;
    font-size: 14px;
    line-height: 1.55;
  }
  .assets-checks {
    margin-top: 18px;
    font-size: 14px;
  }
  .assets-checks li {
    min-height: 32px;
    align-items: flex-start;
  }
  .download-section {
    display: none;
  }
  .news-section {
    padding: 56px 16px 64px;
  }
  .news-title {
    font-size: 30px;
    line-height: 1.35;
  }
  .news-desc {
    margin-top: 12px;
    font-size: 14px;
    line-height: 1.65;
  }
  .news-list {
    margin-top: 28px;
    padding: 0 18px;
    border-radius: 22px;
  }
  .news-item {
    min-height: 0;
    padding: 16px 0;
    align-items: flex-start;
    gap: 14px;
  }
  .news-link {
    font-size: 15px;
    line-height: 1.55;
  }
  .news-time {
    padding-top: 2px;
    font-size: 12px;
  }
  .news-more {
    margin-top: 24px;
  }
  .news-more a {
    min-width: 148px;
    height: 42px;
    padding: 0 24px;
    font-size: 14px;
  }
  .site-footer-design {
    height: auto;
    padding: 24px 16px 28px;
  }
  .footer-legal-row {
    width: min(100%, 430px);
    height: auto;
    flex-wrap: wrap;
    row-gap: 8px;
    column-gap: 12px;
    font-size: 14px;
  }
  .footer-separator {
    height: 12px;
  }
  .footer-meta {
    width: min(100%, 430px);
    margin-top: 18px;
    font-size: 13px;
  }
  .footer-records {
    height: auto;
    flex-wrap: wrap;
    gap: 6px 14px;
  }
}