:root {
  --ink: #15181d;
  --muted: #66707d;
  --paper: #f4f6f7;
  --white: #ffffff;
  --line: #dce2e8;
  --gold: #c69a3a;
  --dark: #0e1217;
  --steel: #303b45;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, Helvetica, sans-serif;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 74px;
  padding: 14px max(28px, calc((100vw - 1360px) / 2 + 28px));
  color: var(--white);
  background: rgba(14, 18, 23, .96);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.brand strong,
.brand span { display: block; }
.brand span {
  margin-top: 4px;
  color: #c6ced6;
  font-size: 13px;
}
nav {
  display: flex;
  gap: 20px;
  color: #e8edf2;
  font-size: 14px;
  white-space: nowrap;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, .72fr) minmax(250px, .44fr);
  gap: 36px;
  align-items: center;
  min-height: calc(100vh - 74px);
  padding: 60px max(34px, calc((100vw - 1360px) / 2 + 34px));
  color: var(--white);
  background:
    radial-gradient(circle at 58% 30%, rgba(198,154,58,.18), transparent 30%),
    linear-gradient(135deg, #101821 0%, #0e1217 62%, #1a1f25 100%);
}
.eyebrow {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}
h1,
h2,
h3 {
  margin: 0;
  line-height: 1.06;
  letter-spacing: 0;
}
h1 {
  max-width: 760px;
  font-size: 64px;
}
h2 { font-size: 40px; }
.lead {
  max-width: 640px;
  margin: 24px 0 0;
  color: #d5dbe1;
  font-size: 20px;
  line-height: 1.55;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 4px;
  font-weight: 800;
}
.button.primary {
  color: #111;
  background: var(--gold);
  border-color: var(--gold);
}
.button.secondary { color: var(--white); }

.hero-stage {
  min-height: 720px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.hero-stage img {
  width: min(150%, 1560px);
  max-width: none;
  max-height: 940px;
  object-fit: contain;
  filter: drop-shadow(0 28px 42px rgba(0,0,0,.42));
}
.hero-specs {
  display: grid;
  gap: 14px;
}
.hero-specs div {
  padding: 20px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 6px;
}
.hero-specs strong {
  display: block;
  color: var(--white);
  font-size: 28px;
}
.hero-specs span {
  display: block;
  margin-top: 7px;
  color: #cbd3dc;
  line-height: 1.35;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}
.trust-strip div {
  padding: 26px 34px;
  background: var(--white);
}
.trust-strip strong,
.trust-strip span { display: block; }
.trust-strip span {
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.45;
}

.section {
  padding: 82px max(32px, calc((100vw - 1320px) / 2 + 32px));
}
.section-heading {
  max-width: 760px;
  margin-bottom: 38px;
}
.section-heading p:not(.eyebrow) {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
}

.color-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.color-card {
  min-height: 620px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px 20px 22px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.color-card img {
  width: 100%;
  height: 500px;
  object-fit: contain;
}
.color-card div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: end;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.color-card strong { font-size: 22px; }
.color-card span {
  color: var(--muted);
  font-size: 13px;
  text-align: right;
  line-height: 1.35;
}
.dark-card { background: #f0f2f4; }
.blue-card { background: #eff6fb; }
.bronze-card,
.gold-card { background: #f6efe4; }

.feature-band {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  gap: 44px;
  padding: 88px max(32px, calc((100vw - 1320px) / 2 + 32px));
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(198,154,58,.10), transparent 42%),
    #10151b;
}
.feature-copy p:not(.eyebrow) {
  max-width: 560px;
  color: #cbd3dc;
  font-size: 18px;
  line-height: 1.65;
}
.detail-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.detail-list article {
  padding: 24px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 6px;
}
.detail-list span {
  display: block;
  margin-bottom: 24px;
  color: var(--gold);
  font-weight: 900;
}
.detail-list strong {
  display: block;
  font-size: 21px;
}
.detail-list p {
  margin: 10px 0 0;
  color: #cbd3dc;
  line-height: 1.5;
}

.size-layout {
  display: grid;
  grid-template-columns: minmax(260px, .72fr) minmax(0, 1fr);
  gap: 38px;
  align-items: center;
}
.size-visual {
  display: flex;
  justify-content: center;
  min-height: 560px;
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.size-visual img {
  max-height: 620px;
  object-fit: contain;
}
.spec-table {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.spec-table dl {
  margin: 0;
}
.spec-table div {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 18px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
}
dt {
  color: var(--muted);
  font-weight: 800;
}
dd {
  margin: 0;
  font-weight: 800;
}
.size-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 18px 22px 22px;
}
.size-chips span {
  min-width: 72px;
  padding: 10px 14px;
  color: var(--dark);
  background: #eef1f4;
  border: 1px solid var(--line);
  border-radius: 4px;
  text-align: center;
  font-weight: 900;
}
.dimension-table {
  overflow-x: auto;
  padding: 0 22px 22px;
}
.dimension-table table {
  width: 100%;
  min-width: 980px;
  border-collapse: collapse;
  font-size: 13px;
}
.dimension-table th,
.dimension-table td {
  padding: 12px 10px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: middle;
}
.dimension-table th {
  color: var(--white);
  background: var(--steel);
  font-weight: 900;
}
.dimension-table td {
  color: var(--ink);
  background: #fafbfc;
  font-weight: 700;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.scenario-grid article {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.scenario-grid img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.scenario-grid div {
  padding: 22px;
}
.scenario-grid strong {
  display: block;
  font-size: 21px;
}
.scenario-grid p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.tools-section { background: #eef1f4; }
.tool-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.tool-grid div {
  min-height: 160px;
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.tool-grid strong,
.tool-grid span { display: block; }
.tool-grid strong { font-size: 20px; }
.tool-grid span {
  margin-top: 12px;
  color: var(--muted);
  line-height: 1.5;
}

.packaging-section {
  padding: 82px max(32px, calc((100vw - 1320px) / 2 + 32px));
  background: var(--white);
}
.package-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.package-grid article {
  padding: 18px;
  background: #f6f8fa;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.package-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  margin-bottom: 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #eef1f4;
}
.package-grid strong {
  display: block;
  font-size: 19px;
}
.package-grid p {
  margin: 9px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.factory-section,
.quote-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, .72fr);
  gap: 40px;
  align-items: center;
  padding: 82px max(32px, calc((100vw - 1320px) / 2 + 32px));
}
.factory-section {
  color: var(--white);
  background: #141a20;
}
.factory-section p:not(.eyebrow),
.quote-section p {
  max-width: 680px;
  line-height: 1.62;
}
.factory-section p:not(.eyebrow) { color: #cbd3dc; }
.factory-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.factory-stats div {
  padding: 22px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 6px;
}
.factory-stats strong,
.factory-stats span { display: block; }
.factory-stats strong {
  color: var(--gold);
  font-size: 34px;
}
.factory-stats span {
  margin-top: 8px;
  color: #cbd3dc;
}
.quote-section {
  background: var(--gold);
}
.quote-section .eyebrow { color: #503a0c; }
.quote-section p { color: #2a210d; }
.message-box {
  padding: 28px;
  background: rgba(255,255,255,.86);
  border: 1px solid rgba(255,255,255,.55);
  border-radius: 8px;
}
.message-box strong { font-size: 21px; }

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px max(32px, calc((100vw - 1320px) / 2 + 32px));
  color: #d8dee5;
  background: #0e1217;
}

@media (max-width: 1100px) {
  .hero,
  .feature-band,
  .size-layout,
  .factory-section,
  .quote-section {
    grid-template-columns: 1fr;
  }
  .hero-stage { min-height: 520px; }
  .hero-stage img { width: min(132%, 1160px); max-height: 760px; }
  .color-grid,
  .trust-strip,
  .tool-grid,
  .package-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .scenario-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .topbar {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }
  nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }
  .hero,
  .section,
  .feature-band,
  .packaging-section,
  .factory-section,
  .quote-section {
    padding: 54px 20px;
  }
  h1 { font-size: 42px; }
  h2 { font-size: 31px; }
  .lead { font-size: 18px; }
  .trust-strip,
  .color-grid,
  .detail-list,
  .tool-grid,
  .package-grid,
  .factory-stats {
    grid-template-columns: 1fr;
  }
  .color-card { min-height: 520px; }
  .color-card img { height: 400px; }
  .spec-table div { grid-template-columns: 1fr; gap: 6px; }
  footer { flex-direction: column; }
}