:root {
  --ink: #0c1929;
  --ink-light: #1a2d44;
  --gold: #c8a062;
  --gold-light: #e0c78a;
  --cream: #faf7f2;
  --white: #ffffff;
  --text: #2a2a2a;
  --text-muted: #6b7280;
  --border: #e8e4dc;
  --shadow: 0 4px 24px rgba(12, 25, 41, 0.08);
  --radius: 2px;
}

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;600;700;900&family=Noto+Sans+SC:wght@300;400;500;700&display=swap');

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', -apple-system, sans-serif;
  color: var(--text);
  background: var(--cream);
  line-height: 1.8;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1240px; margin: 0 auto; padding: 0 28px; }

/* ── Top Bar ── */
.topbar {
  background: var(--ink);
  color: rgba(255,255,255,0.6);
  font-size: 12px;
  padding: 8px 0;
  letter-spacing: 0.5px;
  font-weight: 300;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; }
.topbar strong { color: var(--gold-light); font-weight: 500; letter-spacing: 1px; }

/* ── Header ── */
.header {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: box-shadow 0.3s;
}
.header.scrolled { box-shadow: 0 1px 20px rgba(0,0,0,0.06); }
.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo img { height: 48px; display: block; }
.logo::after { display: none; }

.nav { display: flex; gap: 0; align-items: center; }
.nav a {
  padding: 10px 22px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 1px;
  position: relative;
  transition: color 0.3s;
}
.nav a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 22px;
  right: 22px;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transition: transform 0.3s;
}
.nav a:hover, .nav a.active { color: var(--ink); }
.nav a:hover::after, .nav a.active::after { transform: scaleX(1); }

.nav-toggle { display: none; background: none; border: none; font-size: 22px; cursor: pointer; color: var(--ink); padding: 8px; }

/* ── Hero Carousel ── */
.hero {
  position: relative;
  height: 560px;
  overflow: hidden;
}
.hero-slides {
  position: absolute;
  inset: 0;
  display: flex;
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.hero-slide {
  min-width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  position: relative;
}
.hero-slide::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(12,25,41,0.85) 0%, rgba(12,25,41,0.5) 50%, rgba(12,25,41,0.3) 100%);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
}
.hero-overlay .container { position: relative; z-index: 3; }
.hero-content {
  max-width: 640px;
}
.hero-badge {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--gold-light);
  border: 1px solid rgba(200,160,98,0.3);
  padding: 6px 20px;
  margin-bottom: 28px;
  font-weight: 400;
}
.hero h1 {
  font-family: 'Noto Serif SC', serif;
  font-size: 56px;
  font-weight: 900;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: 3px;
}
.hero h1 span { color: var(--gold-light); }
.hero p {
  font-size: 17px;
  color: rgba(255,255,255,0.6);
  line-height: 1.9;
  margin-bottom: 40px;
  font-weight: 300;
}
.hero-buttons { display: flex; gap: 16px; }

.hero-dots {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  gap: 10px;
}
.hero-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  cursor: pointer;
  transition: all 0.3s;
}
.hero-dot.active { background: var(--gold); width: 28px; border-radius: 5px; }

.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  width: 48px;
  height: 48px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--white);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
  backdrop-filter: blur(4px);
}
.hero-arrow:hover { background: rgba(255,255,255,0.15); border-color: rgba(255,255,255,0.3); }
.hero-arrow.prev { left: 20px; }
.hero-arrow.next { right: 20px; }

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--gold), var(--gold-light), var(--gold));
  z-index: 3;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s;
  border: none;
  font-family: inherit;
  position: relative;
  overflow: hidden;
}
.btn-primary {
  background: var(--gold);
  color: var(--ink);
}
.btn-primary:hover {
  background: var(--gold-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200,160,98,0.3);
}
.btn-outline {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(255,255,255,0.25);
}
.btn-outline:hover {
  border-color: var(--gold-light);
  color: var(--gold-light);
  transform: translateY(-2px);
}
.btn-outline::after {
  content: '→';
  margin-left: 4px;
  transition: transform 0.3s;
}
.btn-outline:hover::after { transform: translateX(4px); }

/* ── Sections ── */
.section { padding: 100px 0; }
.section-alt { background: var(--white); }
.section-dark { background: var(--ink); color: var(--white); }

.section-label {
  font-size: 11px;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 16px;
  font-weight: 500;
}
.section-header { margin-bottom: 60px; max-width: 600px; }
.section-header.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-header h2 {
  font-family: 'Noto Serif SC', serif;
  font-size: 36px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: 16px;
}
.section-dark .section-header h2 { color: var(--white); }
.section-header p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ── Service Grid ── */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
}
.service-card {
  background: var(--white);
  padding: 48px 36px;
  text-decoration: none;
  color: var(--text);
  transition: all 0.4s;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 2px;
  height: 0;
  background: var(--gold);
  transition: height 0.4s;
}
.service-card:hover::before { height: 100%; }
.service-card:hover {
  background: var(--cream);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  z-index: 2;
}
.service-number {
  font-family: 'Noto Serif SC', serif;
  font-size: 48px;
  font-weight: 900;
  color: var(--border);
  line-height: 1;
  margin-bottom: 20px;
  transition: color 0.3s;
}
.service-card:hover .service-number { color: var(--gold); }
.service-card h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}
.service-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}
.service-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  font-size: 13px;
  color: var(--gold);
  font-weight: 500;
  opacity: 0;
  transform: translateX(-8px);
  transition: all 0.3s;
}
.service-card:hover .service-arrow { opacity: 1; transform: translateX(0); }

/* ── Advantage Grid ── */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.advantage-card { text-align: center; padding: 40px 24px; }
.advantage-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 50%;
  color: var(--gold-light);
  font-size: 20px;
  transition: all 0.3s;
}
.advantage-card:hover .advantage-icon {
  background: rgba(200,160,98,0.1);
  border-color: var(--gold);
  transform: scale(1.1);
}
.advantage-card h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--white);
}
.advantage-card p {
  font-size: 14px;
  color: rgba(255,255,255,0.5);
  line-height: 1.8;
  font-weight: 300;
}

/* ── Page Banner ── */
.page-banner {
  background: var(--ink);
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-banner::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}
.page-banner h1 {
  font-family: 'Noto Serif SC', serif;
  font-size: 36px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 4px;
}
.page-banner p {
  color: rgba(255,255,255,0.5);
  margin-top: 12px;
  font-size: 15px;
  font-weight: 300;
}

/* ── Content Layout ── */
.content-layout {
  display: flex;
  gap: 48px;
  align-items: flex-start;
}
.sidebar {
  width: 240px;
  flex-shrink: 0;
  position: sticky;
  top: 100px;
}
.sidebar-title {
  font-family: 'Noto Serif SC', serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  padding-bottom: 16px;
  border-bottom: 2px solid var(--ink);
  margin-bottom: 8px;
  letter-spacing: 2px;
}
.sidebar-nav { list-style: none; }
.sidebar-nav li { border-bottom: 1px solid var(--border); }
.sidebar-nav a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: all 0.3s;
  font-weight: 400;
}
.sidebar-nav a::after {
  content: '→';
  opacity: 0;
  transform: translateX(-8px);
  transition: all 0.3s;
  color: var(--gold);
}
.sidebar-nav a:hover, .sidebar-nav a.active {
  color: var(--ink);
  padding-left: 8px;
}
.sidebar-nav a:hover::after, .sidebar-nav a.active::after {
  opacity: 1;
  transform: translateX(0);
}
.content-main { flex: 1; min-width: 0; }
.content-page { line-height: 2; font-size: 15px; }
.content-page h2 {
  font-family: 'Noto Serif SC', serif;
  font-size: 28px;
  color: var(--ink);
  margin-bottom: 20px;
  font-weight: 700;
}
.content-page h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 20px;
  color: var(--ink);
  margin: 40px 0 16px;
  padding-left: 14px;
  border-left: 3px solid var(--gold);
  font-weight: 700;
  letter-spacing: 1px;
}
.content-page .lead {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
  font-weight: 300;
}
.content-page p { margin-bottom: 20px; }
.content-page img {
  max-width: 100%;
  border-radius: 8px;
  margin: 20px 0;
  box-shadow: 0 2px 16px rgba(12,25,41,0.1);
}
/* 特色列表：金色小方块，不用黑点 */
.content-page ul {
  list-style: none !important;
  padding: 0;
  margin: 16px 0 28px;
}
.content-page ul li {
  padding-left: 0;
  margin-bottom: 12px;
  line-height: 1.9;
  list-style: none !important;
}
.content-page ul li strong { color: var(--ink); font-weight: 600; }
/* 金色方块符号 */
.gold-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--gold);
  border-radius: 1px;
  margin-right: 12px;
  vertical-align: middle;
  position: relative;
  top: -1px;
}

/* ── Contact ── */
.contact-layout { display: flex; gap: 48px; }
.contact-info { flex: 1; }
.contact-info h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 22px;
  color: var(--ink);
  margin-bottom: 28px;
}
.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.contact-item-icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: var(--ink);
  color: var(--gold-light);
  font-size: 18px;
  flex-shrink: 0;
}
.contact-item-label { font-size: 11px; color: var(--text-muted); letter-spacing: 2px; text-transform: uppercase; margin-bottom: 4px; }
.contact-item-value { font-size: 15px; color: var(--text); font-weight: 500; }

/* ── Footer ── */
.footer {
  background: var(--ink);
  color: rgba(255,255,255,0.5);
  padding: 80px 0 32px;
  font-weight: 300;
}
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 60px; }
.footer-col h3 {
  font-family: 'Noto Serif SC', serif;
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--white);
  margin-bottom: 8px;
  font-weight: 600;
}
.footer-col .subtitle {
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--gold);
  margin-bottom: 20px;
  text-transform: uppercase;
}
.footer-col .divider { width: 32px; height: 1px; background: var(--gold); margin-bottom: 24px; }
.footer-col p { font-size: 13px; line-height: 2.2; }
.footer-col a { color: rgba(255,255,255,0.5); text-decoration: none; transition: color 0.3s; }
.footer-col a:hover { color: var(--gold-light); }
.footer-links { display: flex; flex-direction: column; gap: 8px; }
.footer-bottom {
  text-align: center;
  padding-top: 40px;
  margin-top: 60px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 12px;
  color: rgba(255,255,255,0.3);
  letter-spacing: 1px;
}

/* ── Animations ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in {
  animation: fadeUp 0.8s ease-out forwards;
}
.stagger-1 { animation-delay: 0.1s; opacity: 0; }
.stagger-2 { animation-delay: 0.2s; opacity: 0; }
.stagger-3 { animation-delay: 0.3s; opacity: 0; }
.stagger-4 { animation-delay: 0.4s; opacity: 0; }
.stagger-5 { animation-delay: 0.5s; opacity: 0; }
.stagger-6 { animation-delay: 0.6s; opacity: 0; }

/* ── Mobile ── */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .nav { display: none; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); padding: 16px 0; box-shadow: 0 8px 24px rgba(0,0,0,0.1); }
  .nav.open { display: flex; }
  .nav a { padding: 16px 28px; }
  .nav-toggle { display: block; }
  .hero { height: 420px; }
  .hero h1 { font-size: 32px; }
  .hero-arrow { width: 36px; height: 36px; font-size: 14px; }
  .hero-arrow.prev { left: 8px; }
  .hero-arrow.next { right: 8px; }
  .section { padding: 60px 0; }
  .service-grid { grid-template-columns: 1fr; }
  .advantage-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 40px; }
  .content-layout { flex-direction: column; }
  .sidebar { width: 100%; position: static; }
  .contact-layout { flex-direction: column; }
}