:root {
  --black: #121212;
  --ink: #202020;
  --muted: #656565;
  --line: #e7e1d6;
  --gold: #b89656;
  --gold-dark: #92713c;
  --paper: #f7f4ed;
  --white: #ffffff;
  --band: #efeee9;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, "Segoe UI", Arial, "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}
img, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
p { line-height: 1.75; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid rgba(0,0,0,.06);
  backdrop-filter: blur(12px);
}
.header-inner {
  max-width: 1220px;
  height: 72px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 760; font-size: 21px; white-space: nowrap; }
.brand img { width: auto; height: 40px; }
.desktop-nav { display: flex; align-items: center; gap: 6px; }
.nav-group { position: relative; }
.nav-trigger {
  height: 40px;
  padding: 0 10px;
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-weight: 620;
}
.nav-trigger:hover { color: var(--gold); }
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  width: 230px;
  padding: 10px 0;
  transform: translateX(-50%) translateY(8px);
  opacity: 0;
  pointer-events: none;
  background: rgba(255,255,255,.98);
  border: 1px solid rgba(0,0,0,.08);
  box-shadow: 0 18px 42px rgba(0,0,0,.12);
  border-radius: 8px;
  transition: .18s ease;
}
.nav-group:hover .nav-dropdown, .nav-group:focus-within .nav-dropdown {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav-dropdown a { display: block; padding: 10px 20px; font-size: 14px; color: #282828; }
.nav-dropdown a:hover { color: var(--gold); background: #faf8f2; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.lang-btn, .menu-btn {
  border: 1px solid var(--line);
  background: #fff;
  min-width: 42px;
  height: 38px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 680;
}
.menu-btn { display: none; font-size: 22px; }
.gold-btn, .outline-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 760;
  transition: .18s ease;
}
.gold-btn { background: var(--gold); color: #fff; }
.gold-btn:hover { background: var(--black); }
.outline-btn { border: 1px solid var(--gold); color: var(--gold); background: transparent; }
.outline-btn:hover { background: var(--gold); color: #fff; }
.small { min-height: 38px; padding: 0 14px; font-size: 14px; }
.mobile-menu { position: fixed; inset: 0; background: rgba(0,0,0,.48); z-index: 100; }
.mobile-menu-panel {
  width: min(86vw, 340px);
  height: 100%;
  background: #fff;
  padding: 22px;
  overflow: auto;
}
.mobile-menu-top { display: flex; justify-content: space-between; align-items: center; font-weight: 760; font-size: 20px; margin-bottom: 22px; }
.mobile-menu-top button { border: 0; background: transparent; font-size: 30px; cursor: pointer; }
.mobile-nav-section { display: grid; gap: 9px; padding: 14px 0; border-top: 1px solid var(--line); }
.mobile-nav-section strong { color: var(--black); }
.mobile-nav-section a { color: var(--muted); font-size: 15px; }
.hero {
  min-height: 82vh;
  display: grid;
  align-items: end;
  background-image: linear-gradient(90deg, rgba(0,0,0,.76), rgba(0,0,0,.30), rgba(0,0,0,.10)), var(--hero-image);
  background-size: cover;
  background-position: center;
}
.hero-overlay { width: min(1120px, calc(100% - 48px)); margin: 0 auto; padding: 72px 0 84px; color: #fff; }
.eyebrow { color: #e8c77f; font-weight: 780; text-transform: uppercase; font-size: 13px; letter-spacing: .08em; }
h1 { margin: 0 0 18px; font-size: clamp(42px, 7vw, 82px); line-height: .96; max-width: 840px; }
.hero-copy { max-width: 660px; color: rgba(255,255,255,.88); font-size: clamp(17px, 2vw, 21px); }
.page-hero {
  min-height: 440px;
  display: grid;
  align-items: end;
  background-image: linear-gradient(90deg, rgba(0,0,0,.72), rgba(0,0,0,.22)), var(--hero-image);
  background-size: cover;
  background-position: center;
  color: #fff;
}
.page-hero > div { width: min(1120px, calc(100% - 48px)); margin: 0 auto; padding: 72px 0; }
.page-hero p { max-width: 660px; color: rgba(255,255,255,.88); font-size: 18px; }
.section { padding: 72px 24px; }
.section.white { background: #fff; }
.section.band { background: var(--band); }
.section.dark { background: var(--black); color: #fff; }
.inner { max-width: 1120px; margin: 0 auto; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 34px; }
.section-head h2 { margin: 0; font-size: clamp(28px, 4vw, 44px); }
.section-head p { max-width: 600px; color: var(--muted); margin: 0; }
.dark .section-head p { color: rgba(255,255,255,.72); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 34px; align-items: center; }
.feature-card, .plain-card, .support-card {
  background: #fff;
  border: 1px solid rgba(0,0,0,.07);
  border-radius: 8px;
  overflow: hidden;
}
.feature-card img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.feature-card .card-body, .plain-card, .support-card { padding: 24px; }
.feature-card h3, .plain-card h3, .support-card h3 { margin: 0 0 10px; font-size: 22px; }
.feature-card p, .plain-card p, .support-card p { color: var(--muted); margin: 0 0 18px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.tag { background: #f0ece4; color: #4b4439; padding: 8px 10px; border-radius: 8px; font-size: 13px; font-weight: 680; }
.media-row { display: grid; grid-template-columns: 1.4fr .9fr; gap: 22px; align-items: stretch; }
.video-box { background: #000; border-radius: 8px; overflow: hidden; min-height: 280px; }
.video-box video { width: 100%; height: 100%; object-fit: cover; }
.video-box img { width: 100%; height: 100%; min-height: 280px; object-fit: cover; display: block; }
.cta-band { display: flex; justify-content: space-between; gap: 24px; align-items: center; padding: 34px; background: #fff; border: 1px solid var(--line); border-radius: 8px; }
.contact-panel { display: grid; grid-template-columns: .85fr 1.15fr; gap: 32px; align-items: start; }
.contact-panel h2 { margin-top: 0; }
.contact-panel p { color: var(--muted); line-height: 1.75; }
.contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 22px; }
.contact-form label { display: grid; gap: 7px; color: var(--muted); font-size: 14px; }
.contact-form input, .contact-form textarea { width: 100%; border: 1px solid var(--line); border-radius: 8px; padding: 11px 12px; font: inherit; color: var(--black); background: #fff; }
.contact-form textarea { min-height: 120px; resize: vertical; }
.contact-form .full, .contact-form button, .contact-form .form-status { grid-column: 1 / -1; }
.form-status { margin: 0; color: var(--gold); }
.form-status.error { color: #b83a2f; }
.hidden-field { position: absolute; left: -9999px; opacity: 0; }
.gallery { display: grid; gap: 14px; }
.main-photo { border: 0; background: #f1eee8; padding: 0; border-radius: 8px; overflow: hidden; cursor: zoom-in; }
.main-photo img { width: 100%; aspect-ratio: 1.15 / 1; object-fit: cover; }
.thumb-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.thumb { border: 2px solid transparent; padding: 0; border-radius: 8px; overflow: hidden; cursor: pointer; background: #fff; }
.thumb.active { border-color: var(--gold); }
.thumb img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.spec-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 8px; overflow: hidden; }
.spec-table th, .spec-table td { text-align: left; padding: 15px 18px; border-bottom: 1px solid var(--line); }
.spec-table th { color: var(--muted); width: 36%; font-weight: 620; }
.process { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.process .plain-card { position: relative; }
.process .plain-card::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  color: var(--gold);
  font-weight: 820;
  margin-bottom: 16px;
}
.support-list { display: grid; gap: 16px; }
.support-card { scroll-margin-top: 92px; }
.site-footer { background: var(--black); color: #fff; padding: 58px 24px 28px; }
.footer-grid { max-width: 1120px; margin: 0 auto 34px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.site-footer h3 { border-left: 4px solid var(--gold); padding-left: 12px; }
.site-footer a, .site-footer p { display: block; color: rgba(255,255,255,.72); margin: 10px 0; }
.copyright { max-width: 1120px; margin: 0 auto; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.1); color: rgba(255,255,255,.48); text-align: center; font-size: 13px; }
.lightbox { position: fixed; inset: 0; z-index: 200; background: rgba(0,0,0,.9); display: grid; place-items: center; padding: 28px; }
.lightbox[hidden] { display: none; }
.lightbox img { max-height: 88vh; object-fit: contain; }
.lightbox-close { position: absolute; top: 18px; right: 22px; border: 0; color: #fff; background: transparent; font-size: 38px; cursor: pointer; }
@media (max-width: 980px) {
  .desktop-nav { display: none; }
  .menu-btn { display: inline-flex; align-items: center; justify-content: center; }
  .grid-3, .grid-2, .media-row, .process, .footer-grid, .contact-panel, .contact-form { grid-template-columns: 1fr; }
  .section-head, .cta-band { align-items: start; flex-direction: column; }
  .header-inner { padding: 0 16px; }
  .brand span { font-size: 18px; }
  .gold-btn.small { display: none; }
}
@media (max-width: 560px) {
  .hero { min-height: 78vh; }
  .hero-overlay, .page-hero > div { width: min(100% - 32px, 1120px); }
  .section { padding: 54px 16px; }
  .thumb-row { grid-template-columns: repeat(2, 1fr); }
}