:root {
  --black: #050608;
  --deep: #0f1724;
  --ink: #141820;
  --muted: #6c7582;
  --line: #e3e7ec;
  --paper: #f4f6f8;
  --white: #fff;
  --blue: #1769e0;
  --gold: #c5a66b;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

.topbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  height: 72px;
  padding: 0 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--white);
  background: rgba(5, 6, 8, .48);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.topbar.is-scrolled { background: rgba(5, 6, 8, .94); }
.brand { display: inline-flex; align-items: center; gap: 14px; font-weight: 800; }
.brand-mark {
  width: 58px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,.7);
  transform: skew(-10deg);
  letter-spacing: 0;
}
.brand-name { font-size: 15px; color: rgba(255,255,255,.86); }
.nav { display: flex; align-items: center; gap: 30px; font-size: 14px; color: rgba(255,255,255,.78); }
.nav a:hover { color: var(--white); }
.nav-cta { border: 1px solid rgba(255,255,255,.4); padding: 10px 18px; }
.nav-cta:hover { background: var(--white); color: var(--black); }
.menu-toggle { display: none; background: transparent; border: 0; width: 42px; height: 42px; }
.menu-toggle span { display: block; width: 25px; height: 2px; margin: 8px auto; background: var(--white); }

.hero {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  color: var(--white);
  background: var(--black);
}
.product-hero > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(5,6,8,.9) 0%, rgba(5,6,8,.62) 34%, rgba(5,6,8,.04) 78%),
    linear-gradient(0deg, rgba(5,6,8,.86), rgba(5,6,8,0) 48%);
}
.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 760px;
  padding: 21vh 54px 170px;
}
.kicker {
  margin: 0 0 18px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}
.hero h1 {
  margin: 0;
  font-size: clamp(46px, 7vw, 104px);
  line-height: .96;
  letter-spacing: 0;
  font-weight: 800;
}
.hero-copy p:not(.kicker) {
  max-width: 560px;
  margin: 28px 0 0;
  color: rgba(255,255,255,.78);
  line-height: 1.8;
  font-size: 18px;
}
.price-line {
  margin-top: 34px;
  display: flex;
  align-items: baseline;
  gap: 18px;
}
.price-line span { color: rgba(255,255,255,.65); }
.price-line strong { font-size: 34px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button {
  min-width: 150px;
  min-height: 48px;
  padding: 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  border: 1px solid rgba(255,255,255,.36);
}
.button.primary { background: var(--white); color: var(--black); }
.button.glass { color: var(--white); background: rgba(255,255,255,.08); }
.button.dark-text { margin-top: 28px; }
.button:hover, .service-grid a:hover, .quick-links a:hover {
  transform: translateY(-2px);
}
.button, .service-grid a, .quick-links a {
  transition: transform 180ms ease, background 180ms ease, color 180ms ease, border-color 180ms ease;
}
.hero-specs {
  position: absolute;
  z-index: 2;
  left: 0;
  right: 0;
  bottom: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid rgba(255,255,255,.18);
  background: rgba(5,6,8,.28);
}
.hero-specs div { padding: 24px 54px; border-right: 1px solid rgba(255,255,255,.16); }
.hero-specs strong { display: block; font-size: 22px; }
.hero-specs span { color: rgba(255,255,255,.64); font-size: 13px; }

.subnav {
  position: sticky;
  top: 72px;
  z-index: 20;
  display: flex;
  justify-content: center;
  gap: 42px;
  padding: 18px 24px;
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
  font-size: 14px;
}
.section { padding: 104px 54px; }
.section-title { max-width: 1180px; margin: 0 auto 46px; }
.section-title.center { text-align: center; }
h2 {
  margin: 0;
  font-size: clamp(34px, 4.5vw, 64px);
  line-height: 1.08;
  letter-spacing: 0;
}
.intro-grid, .highlight-grid {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.intro-grid article, .highlight-grid article {
  min-height: 250px;
  padding: 34px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 8px;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}
.intro-grid article:hover, .highlight-grid article:hover {
  border-color: rgba(23,105,224,.32);
  box-shadow: 0 24px 60px rgba(13, 31, 58, .08);
  transform: translateY(-4px);
}
.intro-grid span { color: var(--blue); font-weight: 900; }
h3 { margin: 52px 0 14px; font-size: 25px; }
p { line-height: 1.75; }
.intro-grid p, .highlight-grid p, .gallery-copy p, .experience-panel p, .inquiry-copy p { color: var(--muted); margin: 0; }

.models {
  position: relative;
  min-height: 96vh;
  overflow: hidden;
  color: var(--white);
  background: var(--black);
}
.models > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.models::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(5,6,8,.1), rgba(5,6,8,.92)),
    linear-gradient(90deg, rgba(5,6,8,.74), rgba(5,6,8,.08) 70%);
}
.models-copy {
  position: relative;
  z-index: 2;
  max-width: 720px;
  padding: 110px 54px 0;
}
.models-copy p:not(.kicker) {
  color: rgba(255,255,255,.72);
  max-width: 540px;
}
.model-cards {
  position: absolute;
  z-index: 2;
  left: 54px;
  right: 54px;
  bottom: 42px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.model-cards article {
  min-height: 170px;
  padding: 26px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.18);
  backdrop-filter: blur(18px);
}
.model-cards span { color: var(--gold); font-weight: 900; }
.model-cards h3 { margin: 36px 0 8px; }
.model-cards p { margin: 0; color: rgba(255,255,255,.68); }

.gallery {
  min-height: 92vh;
  display: grid;
  grid-template-columns: .42fr .58fr;
  background: var(--black);
  color: var(--white);
}
.gallery-copy { padding: 104px 54px; align-self: center; }
.gallery-copy p { color: rgba(255,255,255,.68); margin-top: 22px; }
.tab-buttons { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.tab-buttons button {
  color: var(--white);
  background: transparent;
  border: 1px solid rgba(255,255,255,.26);
  padding: 13px 22px;
  cursor: pointer;
}
.tab-buttons button.active { background: var(--white); color: var(--black); }
.gallery-stage { min-height: 620px; }
.gallery-stage img { width: 100%; height: 100%; object-fit: cover; }

.services {
  padding: 96px 54px;
  background: #f8f9fb;
}
.service-grid {
  max-width: 1180px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.service-grid a {
  display: grid;
  gap: 10px;
  min-height: 150px;
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
}
.service-grid strong {
  font-size: 22px;
}
.service-grid span {
  color: var(--muted);
  line-height: 1.6;
}

.experience {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: end;
  background: var(--black);
  color: var(--white);
}
.experience > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .88; }
.experience::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(5,6,8,.9), rgba(5,6,8,.1)); }
.experience-panel {
  position: relative;
  z-index: 2;
  margin: 0 54px 70px;
  max-width: 640px;
  padding: 42px;
  background: rgba(5,6,8,.58);
  backdrop-filter: blur(18px);
  border: 1px solid rgba(255,255,255,.16);
}
.experience-panel p { color: rgba(255,255,255,.72); margin-top: 22px; }
.experience-panel ul { display: grid; gap: 12px; padding: 0; margin: 28px 0 0; list-style: none; }
.experience-panel li { padding-left: 20px; position: relative; }
.experience-panel li::before { content: ""; position: absolute; left: 0; top: 11px; width: 7px; height: 7px; background: var(--gold); }

.highlight-grid { grid-template-columns: repeat(4, 1fr); }
.highlight-grid article { background: var(--white); }
.highlight-grid h3 { margin-top: 0; }

.config {
  padding: 104px 54px;
  background: var(--paper);
}
.spec-table {
  max-width: 1180px;
  margin: 0 auto;
  border: 1px solid var(--line);
  background: var(--white);
}
.spec-table div {
  display: grid;
  grid-template-columns: 240px 1fr;
  border-bottom: 1px solid var(--line);
}
.spec-table div:last-child { border-bottom: 0; }
.spec-table span, .spec-table strong { padding: 22px 28px; }
.spec-table span { color: var(--muted); background: #fafbfc; border-right: 1px solid var(--line); }

.brand-story {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: center;
  color: var(--white);
  overflow: hidden;
  background: var(--black);
}
.brand-story > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.brand-story::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(5,6,8,.9), rgba(5,6,8,.42), rgba(5,6,8,.06));
}
.brand-story-copy {
  position: relative;
  z-index: 2;
  max-width: 650px;
  padding: 0 54px;
}
.brand-story-copy p:not(.kicker) {
  color: rgba(255,255,255,.74);
}

.company-band {
  display: grid;
  grid-template-columns: .75fr 1.25fr;
  gap: 70px;
  color: var(--white);
  background:
    radial-gradient(circle at 16% 8%, rgba(197,166,107,.18), transparent 32%),
    linear-gradient(115deg, #07090d, #172030);
}
.company-band > div, .company-band dl { max-width: 1180px; margin: 0 auto; width: 100%; }
.company-band dl { display: grid; gap: 0; }
.company-band dl div {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 26px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(255,255,255,.14);
}
dt { color: var(--muted); }
dd { margin: 0; word-break: break-word; }
.company-band dt { color: rgba(255,255,255,.52); }

.inquiry {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 60px;
  padding: 104px 54px;
}
.inquiry-copy, .lead-form { max-width: 1180px; width: 100%; margin: 0 auto; }
.lead-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.lead-form label { display: grid; gap: 8px; color: var(--muted); font-size: 14px; }
.lead-form input, .lead-form textarea {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  padding: 13px 14px;
  font: inherit;
}
.lead-form textarea { min-height: 120px; resize: vertical; }
.lead-form label:nth-child(4), .lead-form button { grid-column: 1 / -1; }
.lead-form button {
  min-height: 52px;
  border: 0;
  background: var(--black);
  color: var(--white);
  font-weight: 900;
  cursor: pointer;
}
.lead-form button:hover { background: var(--blue); }

.quick-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--black);
  border-top: 1px solid rgba(255,255,255,.1);
}
.quick-links a {
  min-height: 130px;
  display: grid;
  align-content: center;
  gap: 8px;
  padding: 30px 54px;
  color: var(--white);
  border-right: 1px solid rgba(255,255,255,.12);
}
.quick-links span {
  color: rgba(255,255,255,.52);
  font-size: 13px;
}
.quick-links a:hover {
  background: rgba(255,255,255,.08);
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 34px 54px;
  color: rgba(255,255,255,.72);
  background: var(--black);
}
.footer div { display: grid; gap: 4px; }
.footer strong { color: var(--white); }
.footer p { margin: 0; }

@media (max-width: 920px) {
  .topbar { height: 66px; padding: 0 20px; }
  .menu-toggle { display: block; }
  .nav {
    display: none;
    position: absolute;
    top: 66px;
    left: 0;
    right: 0;
    padding: 8px 20px 20px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(5,6,8,.98);
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 14px 0; }
  .nav-cta { text-align: center; margin-top: 8px; }
  .hero-copy { padding: 18vh 22px 148px; }
  .price-line { align-items: flex-start; flex-direction: column; gap: 6px; }
  .hero-specs, .intro-grid, .highlight-grid, .gallery, .company-band, .inquiry, .service-grid, .quick-links, .model-cards { grid-template-columns: 1fr; }
  .hero-specs div { padding: 16px 22px; }
  .subnav { top: 66px; justify-content: flex-start; overflow-x: auto; gap: 24px; }
  .section, .config, .inquiry, .services { padding: 72px 22px; }
  .models { min-height: 106vh; }
  .models-copy { padding: 72px 22px 0; }
  .model-cards { position: relative; left: auto; right: auto; bottom: auto; padding: 34px 22px 48px; margin-top: 38vh; }
  .gallery-copy { padding: 72px 22px 32px; }
  .gallery-stage { min-height: 440px; }
  .experience-panel { margin: 0 22px 38px; padding: 28px; }
  .brand-story-copy { padding: 0 22px; }
  .spec-table div, .company-band dl div, .lead-form { grid-template-columns: 1fr; }
  .spec-table span { border-right: 0; border-bottom: 1px solid var(--line); }
  .quick-links a { padding: 24px 22px; min-height: 100px; }
  .footer { flex-direction: column; align-items: flex-start; padding: 30px 22px; }
}