/* ============================================
   内蒙古梦溪开雾科技有限公司 — 共用样式
   ============================================ */

:root {
  --navy: #14264a;
  --navy-deep: #0c1a36;
  --navy-soft: #1e3458;
  --gold: #b8924f;
  --gold-light: #d4b779;
  --gold-soft: #e8d4a8;
  --ink: #1a1a2e;
  --paper: #fafaf5;
  --paper-warm: #f5f1e8;
  --fog: #e8eef5;
  --mist: #f0f3f8;
  --line: rgba(20, 38, 74, 0.08);
  --shadow-sm: 0 2px 12px rgba(20, 38, 74, 0.06);
  --shadow-md: 0 8px 32px rgba(20, 38, 74, 0.1);
  --shadow-lg: 0 24px 64px rgba(20, 38, 74, 0.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', -apple-system, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(250, 250, 245, 0.85);
  border-bottom: 1px solid var(--line);
  transition: all 0.4s ease;
}

.nav-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 18px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--navy);
}

.nav-brand img {
  width: 46px;
  height: 46px;
  object-fit: contain;
}

.nav-brand-text { line-height: 1.15; }

.nav-brand-cn {
  font-family: 'Noto Serif SC', serif;
  font-weight: 600;
  font-size: 16px;
  letter-spacing: 0.5px;
  color: var(--navy);
}

.nav-brand-en {
  font-family: 'Cinzel', serif;
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--gold);
  margin-top: 2px;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 4px;
}

.nav-menu a {
  display: block;
  padding: 10px 22px;
  text-decoration: none;
  color: var(--ink);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 1px;
  position: relative;
  transition: color 0.3s;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 4px;
  width: 0;
  height: 2px;
  background: var(--gold);
  transform: translateX(-50%);
  transition: width 0.35s ease;
}

.nav-menu a:hover { color: var(--navy); }
.nav-menu a:hover::after { width: 28px; }
.nav-menu a.active { color: var(--navy); }
.nav-menu a.active::after { width: 28px; }

.nav-cta {
  padding: 10px 22px;
  border: 1px solid var(--gold);
  color: var(--gold);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 2px;
  transition: all 0.3s;
}
.nav-cta:hover {
  background: var(--gold);
  color: white;
}

/* ---------- Page Banner (sub-pages) ---------- */
.banner {
  position: relative;
  padding: 200px 48px 100px;
  text-align: center;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(184, 146, 79, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(20, 38, 74, 0.12) 0%, transparent 50%),
    linear-gradient(180deg, #fafaf5 0%, #f0f3f8 100%);
  overflow: hidden;
}

.banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(20, 38, 74, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 38, 74, 0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  pointer-events: none;
}

.banner-eyebrow {
  position: relative;
  font-family: 'Cinzel', serif;
  font-size: 12px;
  letter-spacing: 6px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.banner-title {
  position: relative;
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: 600;
  color: var(--navy);
  letter-spacing: 6px;
  margin-bottom: 24px;
}

.banner-crumb {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  color: rgba(26, 26, 46, 0.6);
  letter-spacing: 1px;
}

.banner-crumb a {
  color: rgba(26, 26, 46, 0.6);
  text-decoration: none;
  transition: color 0.3s;
}
.banner-crumb a:hover { color: var(--gold); }
.banner-crumb .sep { color: var(--gold); }
.banner-crumb .current { color: var(--navy); font-weight: 500; }

/* ---------- Section Common ---------- */
section {
  padding: 130px 48px;
  position: relative;
}

.section-inner {
  max-width: 1320px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 80px;
}

.section-eyebrow {
  font-family: 'Cinzel', serif;
  font-size: 11px;
  letter-spacing: 6px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 18px;
}

.section-title {
  font-family: 'Noto Serif SC', serif;
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 600;
  color: var(--navy);
  letter-spacing: 4px;
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 15px;
  color: rgba(26, 26, 46, 0.65);
  letter-spacing: 1px;
  max-width: 600px;
  margin: 0 auto;
}

.section-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 24px;
}
.section-mark .line {
  width: 50px; height: 1px;
  background: var(--gold);
}
.section-mark .dot {
  width: 5px; height: 5px;
  background: var(--gold);
  transform: rotate(45deg);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 38px;
  text-decoration: none;
  font-size: 14px;
  letter-spacing: 3px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  border: none;
  font-family: inherit;
}

.btn-primary {
  background: var(--navy);
  color: white;
  border: 1px solid var(--navy);
}
.btn-primary:hover {
  background: var(--navy-deep);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-ghost {
  background: transparent;
  color: var(--navy);
  border: 1px solid var(--navy);
}
.btn-ghost:hover {
  background: var(--navy);
  color: white;
  transform: translateY(-2px);
}

.btn .arrow { transition: transform 0.3s; }
.btn:hover .arrow { transform: translateX(4px); }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Footer ---------- */
footer {
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.6);
  padding: 80px 48px 40px;
  position: relative;
}

footer::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 2px;
  background: var(--gold);
}

.footer-inner {
  max-width: 1320px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand-col { }

.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
}

.footer-brand img { width: 56px; height: 56px; }

.footer-brand-cn {
  font-family: 'Noto Serif SC', serif;
  font-size: 18px;
  font-weight: 600;
  color: white;
  letter-spacing: 2px;
}

.footer-brand-en {
  font-family: 'Cinzel', serif;
  font-size: 11px;
  color: var(--gold);
  letter-spacing: 4px;
  margin-top: 4px;
}

.footer-tagline {
  font-family: 'Noto Serif SC', serif;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 1px;
}

.footer-col h4 {
  font-family: 'Noto Serif SC', serif;
  font-size: 14px;
  color: white;
  letter-spacing: 3px;
  margin-bottom: 24px;
  font-weight: 500;
}

.footer-col ul { list-style: none; }
.footer-col li {
  margin-bottom: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 1px;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.5);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 1px;
  transition: color 0.3s;
}
.footer-col a:hover { color: var(--gold-light); }

.footer-bottom {
  padding-top: 32px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 12px;
  letter-spacing: 1px;
  gap: 0;
}

.footer-bottom div {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-bottom span {
  display: inline;
  white-space: nowrap;
}

.footer-bottom span:not(:last-child)::after {
  content: ' | ';
  margin: 0 12px;
  color: var(--line);
}

.footer-bottom .seal {
  font-family: 'Cinzel', serif;
  color: var(--gold);
  letter-spacing: 4px;
}

/* ---------- Responsive ---------- */
@media (max-width: 968px) {
  .nav-inner { padding: 14px 24px; }
  .nav-menu { display: none; }
  section { padding: 90px 24px; }
  .banner { padding: 160px 24px 70px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 40px; }
  .footer-brand-col { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 600px) {
  .footer-top { grid-template-columns: 1fr; }
  .footer-brand-col { grid-column: auto; }
}