:root {
  color-scheme: dark;
  --bg: #0b0d0f;
  --fg: #f4f4f2;
  --muted: rgba(244, 244, 242, 0.58);
  --soft: rgba(244, 244, 242, 0.42);
  --line: rgba(255, 255, 255, 0.13);
  --glass: rgba(20, 24, 28, 0.52);
}

* { box-sizing: border-box; }

html {
  background: var(--bg);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
  font-family: "SF Pro Display", "SF Pro Text", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

.shell {
  width: min(calc(100% - 32px), 1320px);
  margin-inline: auto;
}

.glass {
  position: relative;
  isolation: isolate;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.055), transparent 45%),
    var(--glass);
  box-shadow:
    0 14px 40px rgba(0, 0, 0, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(20px) saturate(118%);
  -webkit-backdrop-filter: blur(20px) saturate(118%);
}

.glass::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  pointer-events: none;
  background: radial-gradient(80% 120% at 10% -15%, rgba(255, 255, 255, 0.09), transparent 50%);
}

.nav {
  position: fixed;
  top: 22px;
  left: 50%;
  z-index: 30;
  width: min(calc(100% - 112px), 1320px);
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: 180px 1fr 180px;
  align-items: center;
  border-radius: 999px;
  padding: 15.6px 20px;
}

.brand {
  font-size: 16px;
  font-weight: 650;
  letter-spacing: 0.44em;
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: 38px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
}

.nav-right {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
  font-size: 15px;
}

.login-link {
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
  transition: color 160ms ease;
}

.login-link:hover {
  color: #fff;
}

.hero {
  position: relative;
  min-height: 760px;
  overflow: hidden;
}

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

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.78), rgba(0, 0, 0, 0.28), rgba(0, 0, 0, 0.1));
  z-index: 1;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, var(--bg) 0%, rgba(11, 13, 15, 0.72) 10%, transparent 42%, rgba(0, 0, 0, 0.18) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  min-height: 760px;
  display: flex;
  align-items: flex-end;
  padding-bottom: 96px;
}

.hero-copy {
  max-width: 620px;
}

h1, h2, h3, p { margin-top: 0; }

h1 {
  margin: 0;
  font-size: clamp(54px, 6vw, 92px);
  line-height: 0.98;
  font-weight: 650;
  letter-spacing: -0.06em;
}

.lead {
  margin: 24px 0 0;
  max-width: 460px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 16px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 30px;
}

.pill {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  padding: 0 22px;
  font-size: 15px;
  font-weight: 520;
}

.pill.glass {
  border-color: rgba(255, 255, 255, 0.16);
}

.ghost {
  color: rgba(255, 255, 255, 0.82);
}

.hero-float {
  position: absolute;
  right: 60px;
  bottom: 78px;
  z-index: 3;
  display: flex;
  min-width: 310px;
  align-items: center;
  gap: 14px;
  border-radius: 22px;
  padding: 12px;
}

.float-thumb {
  width: 52px;
  height: 52px;
  overflow: hidden;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.08);
}

.float-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.float-title {
  flex: 1;
  min-width: 0;
}

.float-title strong {
  display: block;
  font-size: 14px;
  font-weight: 560;
}

.float-title span {
  display: block;
  margin-top: 5px;
  color: rgba(255, 255, 255, 0.48);
  font-size: 11px;
}

.float-price {
  font-size: 14px;
  white-space: nowrap;
}

.float-view {
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  padding: 10px 16px;
  font-size: 13px;
}

.section {
  padding: 82px 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 34px;
}

.eyebrow {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.section h2 {
  margin: 14px 0 0;
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1;
  font-weight: 560;
  letter-spacing: -0.045em;
}

.filter {
  display: flex;
  gap: 4px;
  border-radius: 999px;
  padding: 5px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
}

.filter span {
  border-radius: 999px;
  padding: 10px 18px;
}

.filter .active {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 20px;
}

.wallpaper-card {
  display: block;
  overflow: hidden;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
}

.wallpaper-card img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  transition: transform 480ms cubic-bezier(0.2, 0.75, 0.2, 1);
}

.wallpaper-card:hover img {
  transform: scale(1.018);
}

.card-body {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 4px 0;
}

.card-body strong, .card-body span {
  display: block;
}

.card-body strong {
  font-size: 14px;
  font-weight: 560;
}

.card-body span {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.46);
  font-size: 11px;
}

.price {
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
  white-space: nowrap;
}

.devices {
  display: grid;
  grid-template-columns: 3fr 6fr 3fr;
  gap: 16px;
}

.device {
  position: relative;
  min-height: 250px;
  overflow: hidden;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
}

.device.wide {
  min-height: 250px;
}

.device img {
  width: 100%;
  height: 100%;
  min-height: 250px;
  object-fit: cover;
  display: block;
}

.device::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0, 0, 0, 0.72), transparent 60%);
}

.device-label {
  position: absolute;
  inset-inline: 22px;
  bottom: 20px;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 18px;
  font-weight: 560;
}

.circle {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 999px;
}

.detail {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.48fr);
  gap: 38px;
  padding: 122px 0 76px;
}

.detail-visual {
  overflow: hidden;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.04);
}

.detail-visual img {
  display: block;
  width: 100%;
  max-height: 76svh;
  object-fit: cover;
}

.buy-panel {
  align-self: start;
  position: sticky;
  top: 96px;
  border-radius: 24px;
  padding: 28px;
}

.buy-panel h1 {
  font-size: clamp(42px, 5vw, 72px);
}

.specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 26px 0;
}

.spec {
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.06);
  padding: 14px;
  color: rgba(255, 255, 255, 0.46);
  font-size: 12px;
}

.spec strong {
  display: block;
  margin-top: 6px;
  color: #fff;
  font-size: 14px;
}

.auth-card {
  display: grid;
  min-height: 100svh;
  place-items: center;
  padding: 92px 16px 44px;
}

.auth-card form {
  width: min(100%, 430px);
  border-radius: 24px;
  padding: 30px;
}

input {
  width: 100%;
  height: 48px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  margin: 10px 0;
  padding: 0 14px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--fg);
  outline: none;
}

footer {
  padding: 54px 0 90px;
  color: rgba(255, 255, 255, 0.42);
  font-size: 13px;
}

.bottom-nav { display: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .glass {
    background: rgba(20, 24, 28, 0.96);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}

@supports not ((backdrop-filter: blur(1px))) {
  .glass {
    background: rgba(20, 24, 28, 0.94);
  }
}

@media (max-width: 1023px) {
  .nav {
    width: min(calc(100% - 32px), 960px);
    grid-template-columns: 120px 1fr 120px;
  }

  .nav-links {
    gap: 20px;
  }

  .hero-float {
    right: 24px;
  }

  .gallery {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .devices, .detail {
    grid-template-columns: 1fr;
  }

  .buy-panel {
    position: static;
  }
}

@media (max-width: 767px) {
  .shell {
    width: calc(100% - 24px);
  }

  .nav {
    top: 12px;
    display: flex;
    width: calc(100% - 24px);
    justify-content: space-between;
    padding: 14.4px 16px;
  }

  .nav-links {
    display: none;
  }

  .nav-right {
    gap: 12px;
    font-size: 13px;
  }

  .hero,
  .hero-content {
    min-height: 720px;
  }

  .hero-content {
    padding-bottom: 110px;
  }

  h1 {
    font-size: clamp(44px, 14vw, 68px);
  }

  .lead {
    font-size: 14px;
  }

  .hero-float {
    display: none;
  }

  .section {
    padding: 56px 0;
  }

  .section-head {
    display: block;
  }

  .filter {
    display: none;
  }

  .gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 12px;
  }

  .device img {
    min-height: 190px;
  }

  .bottom-nav {
    position: fixed;
    right: 14px;
    bottom: 14px;
    left: 14px;
    z-index: 40;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    border-radius: 999px;
    padding: 8px;
    text-align: center;
    font-size: 12px;
  }

  .bottom-nav a {
    border-radius: 999px;
    padding: 10px 0;
    color: rgba(255, 255, 255, 0.72);
  }
}