:root {
  --ink: #182024;
  --muted: #657178;
  --paper: #f6f3ed;
  --panel: #ffffff;
  --line: #ded8cc;
  --accent: #2f766d;
  --accent-dark: #1f5852;
  --sun: #f2b84b;
  --clay: #b85d45;
  --shadow: 0 24px 70px rgba(24, 32, 36, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
  padding: 0 clamp(20px, 5vw, 64px);
  background: rgba(246, 243, 237, 0.88);
  border-bottom: 1px solid rgba(222, 216, 204, 0.75);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.hero-actions,
.hero-stats,
.swatches,
.segments,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: conic-gradient(from 40deg, var(--sun), var(--accent), var(--clay), var(--sun));
  box-shadow: inset 0 0 0 4px rgba(255, 255, 255, 0.35);
}

.nav-links {
  gap: 28px;
  color: var(--muted);
  font-size: 15px;
}

.nav-links a:hover,
.site-footer a:hover {
  color: var(--accent-dark);
}

.header-action,
.button {
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
}

.header-action {
  padding: 11px 16px;
  color: white;
  background: var(--ink);
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  align-items: center;
  gap: clamp(28px, 6vw, 84px);
  padding: clamp(36px, 5vw, 72px) clamp(20px, 6vw, 82px) 34px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 18px;
  font-size: clamp(58px, 11vw, 132px);
  line-height: 0.9;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 5vw, 58px);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

.hero-subtitle {
  max-width: 620px;
  color: #3c474c;
  font-size: clamp(18px, 2.1vw, 24px);
  line-height: 1.65;
}

.hero-actions {
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
}

.button.primary {
  color: white;
  background: var(--accent);
}

.button.primary:hover {
  background: var(--accent-dark);
}

.button.secondary {
  color: var(--ink);
  background: #ebe5d9;
}

.hero-stats {
  gap: 28px;
  flex-wrap: wrap;
  margin-top: 42px;
}

.hero-stats div {
  min-width: 86px;
}

.hero-stats dt {
  font-size: 28px;
  font-weight: 900;
}

.hero-stats dd {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-visual {
  position: relative;
  min-height: 520px;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.ambient-ring {
  position: absolute;
  width: min(70vw, 640px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, rgba(255, 255, 255, 0) 43%, rgba(242, 184, 75, 0.55) 44%, rgba(242, 184, 75, 0) 62%),
    radial-gradient(circle at center, rgba(47, 118, 109, 0.18), rgba(47, 118, 109, 0) 62%);
}

.product-stage {
  position: relative;
  width: min(88vw, 580px);
  height: 440px;
  filter: drop-shadow(0 34px 46px rgba(24, 32, 36, 0.24));
}

.lamp-head {
  position: absolute;
  left: 88px;
  top: 30px;
  width: 355px;
  height: 62px;
  border-radius: 40px 40px 18px 18px;
  background: linear-gradient(180deg, #303a3e, #12181a);
  transform: rotate(-6deg);
}

.lamp-head span {
  position: absolute;
  left: 30px;
  right: 30px;
  bottom: 8px;
  height: 12px;
  border-radius: 99px;
  background: linear-gradient(90deg, #ffe9ad, #ffffff, #ffe1a4);
  box-shadow: 0 18px 70px rgba(242, 184, 75, 0.55);
}

.lamp-arm {
  position: absolute;
  left: 292px;
  top: 78px;
  width: 34px;
  height: 228px;
  border-radius: 18px;
  background: linear-gradient(90deg, #677176, #20282c 62%, #111618);
}

.dock-body {
  position: absolute;
  left: 90px;
  right: 26px;
  bottom: 32px;
  height: 154px;
  border-radius: 34px 34px 22px 22px;
  background: linear-gradient(145deg, #f7f5ef, #bbb4a7 74%, #8e887e);
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.charge-pad {
  position: absolute;
  left: 38px;
  top: 28px;
  width: 116px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, #fefdf9 0 42%, #d5cec1 43% 44%, transparent 45%);
}

.status-line {
  position: absolute;
  left: 190px;
  right: 58px;
  top: 60px;
  height: 8px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--accent), var(--sun), var(--clay));
}

.ports {
  position: absolute;
  right: 42px;
  bottom: 30px;
  display: flex;
  gap: 10px;
}

.ports span {
  width: 28px;
  height: 14px;
  border-radius: 5px;
  background: #323a3d;
}

.phone {
  position: absolute;
  right: 34px;
  bottom: 98px;
  width: 120px;
  height: 218px;
  padding: 10px;
  border-radius: 26px;
  background: #111618;
  transform: rotate(8deg);
}

.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 20px;
  background:
    linear-gradient(145deg, rgba(47, 118, 109, 0.9), rgba(242, 184, 75, 0.82)),
    linear-gradient(#fff, #fff);
}

.strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 0 clamp(20px, 6vw, 82px);
  background: var(--line);
  border: 1px solid var(--line);
}

.strip div {
  padding: 24px;
  background: #fffaf2;
}

.strip span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 14px;
}

.strip strong {
  font-size: clamp(18px, 2vw, 24px);
}

.section {
  padding: clamp(70px, 10vw, 128px) clamp(20px, 6vw, 82px);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 34px;
}

.intro-grid,
.feature-grid {
  display: grid;
  gap: 18px;
}

.intro-grid {
  grid-template-columns: 1fr 1fr;
}

.intro-grid article,
.feature-card,
.configurator,
.spec-content {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 12px 28px rgba(24, 32, 36, 0.06);
}

.intro-grid article {
  overflow: hidden;
}

.intro-grid h3,
.intro-grid p {
  padding-inline: 24px;
}

.intro-grid h3 {
  margin-top: 22px;
}

.intro-grid p,
.feature-card p,
.buy-copy p,
.spec-content li {
  color: var(--muted);
  line-height: 1.75;
}

.feature-grid {
  grid-template-columns: repeat(4, 1fr);
}

.feature-card {
  padding: 24px;
}

.icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 18px;
  border-radius: 8px;
  color: white;
  background: var(--ink);
  font-size: 20px;
}

.spec-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 18px;
}

.spec-panel {
  display: grid;
  gap: 10px;
  align-content: start;
}

.tab,
.segment,
.swatch {
  cursor: pointer;
  border: 1px solid var(--line);
  background: #fffaf2;
}

.tab {
  min-height: 52px;
  border-radius: 8px;
  color: var(--muted);
  font: inherit;
  font-weight: 800;
}

.tab.active,
.segment.active {
  color: white;
  background: var(--accent);
  border-color: var(--accent);
}

.spec-content {
  min-height: 228px;
  padding: 26px 30px;
}

.spec-content ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 28px;
  margin: 20px 0 0;
  padding-left: 20px;
}

.buy {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 420px;
  align-items: center;
  gap: clamp(28px, 6vw, 72px);
  background: #e9efe9;
}

.buy-copy p {
  max-width: 600px;
  font-size: 18px;
}

.configurator {
  padding: 24px;
}

.config-row,
.price-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.swatches,
.segments {
  gap: 8px;
}

.swatch {
  width: 34px;
  height: 34px;
  border-radius: 50%;
}

.swatch[data-color="moon"] {
  background: #d8d3c8;
}

.swatch[data-color="graphite"] {
  background: #242b2f;
}

.swatch[data-color="sage"] {
  background: #8ea89a;
}

.swatch.active {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.segment {
  min-height: 38px;
  padding: 0 14px;
  border-radius: 8px;
  font: inherit;
  font-weight: 800;
}

.price-line {
  border-bottom: 0;
}

.price-line strong {
  font-size: 34px;
}

.full {
  width: 100%;
}

.site-footer {
  justify-content: space-between;
  min-height: 86px;
  padding: 0 clamp(20px, 6vw, 82px);
  color: var(--muted);
  background: var(--ink);
}

.site-footer span,
.site-footer a {
  color: white;
}

@media (max-width: 980px) {
  .nav-links {
    display: none;
  }

  .hero,
  .buy {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 430px;
    order: -1;
  }

  .product-stage {
    transform: scale(0.86);
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .spec-layout {
    grid-template-columns: 1fr;
  }

  .spec-panel {
    grid-template-columns: repeat(3, 1fr);
  }

  .buy {
    align-items: stretch;
  }
}

@media (max-width: 680px) {
  .site-header {
    height: 64px;
  }

  .header-action {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: 24px;
  }

  .hero-visual {
    min-height: 320px;
  }

  .product-stage {
    transform: scale(0.66);
  }

  .strip,
  .intro-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .spec-content ul {
    grid-template-columns: 1fr;
  }

  .config-row {
    align-items: flex-start;
    flex-direction: column;
  }
}