:root {
  color-scheme: dark;
  --ink: #080a0b;
  --ink-raised: #101416;
  --ink-soft: #171c1d;
  --paper: #f5f2ea;
  --muted: #aeb9b7;
  --line: rgba(245, 242, 234, 0.16);
  --line-strong: rgba(216, 178, 88, 0.6);
  --gold: #d8b258;
  --cyan: #65d5d1;
  --max: 1240px;
}

* { box-sizing: border-box; }
html { background: var(--ink); }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--ink);
  color: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
img, video { display: block; max-width: 100%; }

.site-header,
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  max-width: none;
  min-height: 72px;
  margin: 0;
  padding: 13px clamp(18px, 4vw, 64px);
  border-bottom: 1px solid var(--line);
  background: rgba(8, 10, 11, 0.94);
  backdrop-filter: blur(14px);
}
.site-header { display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.nav { display: flex; align-items: center; gap: 6px; }
.brand { display: inline-flex; min-width: 220px; align-items: center; gap: 10px; color: var(--paper); font-weight: 800; }
.nav .brand { margin-right: auto; font-size: 18px; }
.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid var(--gold);
  border-radius: 4px;
  color: var(--gold);
  font-weight: 900;
}
.brand small { display: block; margin-top: 2px; color: var(--muted); font-size: 10px; font-weight: 700; letter-spacing: 0.12em; }
.main-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 2px; }
.main-nav a, .nav > a:not(.brand), .header-call {
  padding: 9px 10px;
  border-bottom: 1px solid transparent;
  color: #dce2df;
  font-size: 14px;
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a[aria-current="page"], .nav > a:hover, .nav > a.active {
  border-bottom-color: var(--gold);
  color: var(--paper);
}
.header-call {
  margin-left: auto;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  color: #f3d990;
  font-weight: 700;
}

.premium-home .hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  gap: clamp(32px, 5vw, 76px);
  align-items: end;
  width: min(var(--max), calc(100% - 48px));
  min-height: min(800px, calc(100vh - 72px));
  margin: 0 auto;
  padding: clamp(72px, 10vw, 142px) 0 72px;
  background: none;
}
.premium-home .eyebrow, .eyebrow { color: var(--gold); font-size: 12px; font-weight: 800; letter-spacing: 0.14em; }
.premium-home h1 { max-width: 680px; margin: 14px 0 24px; font-size: clamp(48px, 5.5vw, 82px); line-height: 1.04; }
.premium-home .hero-lede { max-width: 600px; color: #c3ceca; font-size: 17px; line-height: 1.85; }
.premium-home .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.premium-home .btn, .button, .cta .button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--gold);
  border-radius: 4px;
  padding: 0 19px;
  color: var(--paper);
  font-weight: 800;
}
.premium-home .btn-primary, .button { background: var(--gold); color: #15120a; }
.premium-home .btn-secondary { border-color: var(--line); background: transparent; }
.premium-home .proof-strip { display: flex; gap: 0; margin-top: 48px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.premium-home .proof-strip div { flex: 1; padding: 16px 14px 17px 0; border: 0; background: transparent; box-shadow: none; }
.premium-home .proof-strip div + div { padding-left: 18px; border-left: 1px solid var(--line); }
.premium-home .proof-strip strong { color: var(--paper); font-size: 29px; }
.premium-home .proof-strip span { color: var(--muted); font-size: 12px; }
.premium-home .hero-media { overflow: hidden; border: 1px solid var(--line); border-radius: 6px; box-shadow: none; }
.premium-home .hero-media::after { background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.78)); }
.premium-home .media-caption { right: 26px; bottom: 24px; left: 26px; }
.premium-home .media-caption span { color: var(--gold); }

.premium-home .section, .main, .wrap { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; padding: 96px 0; }
.premium-home .section { border-top: 1px solid rgba(245, 242, 234, 0.1); }
.premium-home .section-heading { max-width: 790px; margin-bottom: 38px; }
.premium-home h2, .heading h2, .section-head h2 { font-size: clamp(30px, 4vw, 54px); line-height: 1.12; }
.premium-home .section-heading p, .heading p { color: var(--muted); line-height: 1.8; }
.premium-home .scenario-grid, .premium-home .advantage-list, .premium-home .faq-grid, .premium-home .process-list { gap: 1px; background: var(--line); }
.premium-home .scenario-grid article, .premium-home .advantage-list article, .premium-home .faq-grid article, .premium-home .process-list li {
  border: 0;
  border-radius: 0;
  background: var(--ink-raised);
  box-shadow: none;
}
.premium-home .scenario-grid article:hover, .premium-home .advantage-list article:hover { background: var(--ink-soft); }
.premium-home .case-feature, .premium-home .case-list a, .image-card, .video-card, .card, .feature, .article, .panel, .side-panel { border-radius: 6px; box-shadow: none; }
.premium-home .case-feature, .premium-home .case-list a { border-color: var(--line); }
.premium-home .case-feature { min-height: 580px; }
.premium-home .case-list a { min-height: 180px; }
.premium-home .split-media { min-height: 510px; overflow: hidden; border: 1px solid var(--line); border-radius: 6px; }
.premium-home .split-media img { width: 100%; height: 100%; object-fit: cover; }
.premium-home .contact-card { border-radius: 6px; background: var(--ink-raised); box-shadow: none; }
.premium-home .contact-form input, .premium-home .contact-form textarea { border-radius: 3px; background: #0a0d0e; }
.premium-home .contact-form button { border-radius: 4px; background: var(--gold); color: #15120a; }

/* Shared category, product, news, and article treatment. */
.hero { min-height: 360px; padding: 100px max(24px, calc((100% - var(--max)) / 2)) 64px; background-color: #111 !important; background-position: center !important; }
.hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(8,10,11,.92), rgba(8,10,11,.46)); pointer-events: none; }
.hero > * { position: relative; z-index: 1; }
.hero h1, .hero-title h1 { max-width: 820px; margin: 0 0 14px; color: var(--paper); font-size: clamp(38px, 5vw, 66px); letter-spacing: 0; }
.hero .lede, .hero-title p { max-width: 720px; color: #d0d8d5; line-height: 1.8; }
.hero-title { max-width: var(--max); margin: 0 auto !important; padding: 0 !important; }
.heading, .section-head { margin-bottom: 32px; }
.heading p, .section-head p, .muted, .meta, .excerpt { color: var(--muted) !important; }
.image-grid, .product-grid, .grid { gap: 14px; }
.image-card, .video-card, .card, .feature, .article, .panel, .side-panel, .cta, .performance-photo { border: 1px solid var(--line) !important; background: var(--ink-raised) !important; }
.image-card, .video-card, .card, .feature, .article, .panel, .side-panel, .cta, .performance-photo { border-radius: 6px !important; box-shadow: none !important; }
.image-card:hover, .video-card:hover, .card:hover, .product-card:hover { border-color: var(--line-strong) !important; transform: none !important; }
.product-card { border: 1px solid var(--line); border-radius: 6px; background: var(--ink-raised); box-shadow: none; }
.product-card img, .card img { background: #151918; }
.tag, .topic { border-radius: 3px !important; color: var(--gold) !important; border-color: rgba(216,178,88,.42) !important; background: transparent !important; }
.price strong, .readmore, .link, .back, .text-link { color: var(--gold) !important; }
.article { max-width: 860px; padding: clamp(24px, 4vw, 56px); }
.article .content { color: #dce3df !important; font-size: 17px; line-height: 1.95; }
.article .content h2, .article .content h3 { color: var(--paper) !important; }
.article .content img { border-radius: 4px; }
.feature { min-height: 360px; }
.cta { padding: clamp(24px, 4vw, 44px); }
.footer, .site-footer { border-top: 1px solid var(--line); background: #060707; color: var(--muted); }

@media (max-width: 920px) {
  .site-header, .nav { align-items: flex-start; flex-wrap: wrap; gap: 10px; }
  .brand, .nav .brand { min-width: auto; margin-right: auto; }
  .main-nav { order: 3; width: 100%; flex-wrap: nowrap; justify-content: flex-start; overflow-x: auto; }
  .header-call { display: none; }
  .premium-home .hero { grid-template-columns: 1fr; min-height: 0; padding-top: 56px; }
  .premium-home .hero-media { order: -1; }
  .premium-home .split-media { min-height: 340px; }
}

@media (max-width: 600px) {
  .site-header, .nav { min-height: 62px; padding: 10px 15px; }
  .main-nav a, .nav > a:not(.brand) { padding: 7px 8px; font-size: 12px; }
  .premium-home .hero, .premium-home .section, .main, .wrap { width: min(100% - 28px, var(--max)); }
  .premium-home .hero { gap: 28px; padding: 38px 0 48px; }
  .premium-home h1 { font-size: clamp(40px, 12vw, 56px); }
  .premium-home .hero-lede { font-size: 15px; }
  .premium-home .proof-strip { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 30px; }
  .premium-home .proof-strip div, .premium-home .proof-strip div + div { padding: 12px 8px; border-left: 0; }
  .premium-home .proof-strip strong { font-size: 23px; }
  .premium-home .proof-strip span { font-size: 10px; }
  .premium-home .section, .main, .wrap { padding: 62px 0; }
  .premium-home .case-feature { min-height: 420px; }
  .premium-home .case-list a { min-height: 168px; }
  .hero { min-height: 310px; padding: 72px 20px 42px; }
  .article { padding: 24px 18px; }
  .article .content { font-size: 16px; }
}