/* ====== Reset & Base ====== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: #1a1a1a;
  --bg-card-hover: #222222;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --text-muted: #707070;
  --accent: #c9a96e;
  --accent-dim: #a68b5b;
  --border: #2a2a2a;
  --radius: 12px;
  --transition: 0.3s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

/* ====== Header / Navigation ====== */
header {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), box-shadow var(--transition);
}
header.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.5); }

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: 2px;
}
.logo:hover { color: var(--accent); }

nav {
  display: flex;
  gap: 32px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  position: relative;
  padding: 4px 0;
  transition: color var(--transition);
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}
.nav-link:hover,
.nav-link.active { color: var(--text-primary); }
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 24px;
  cursor: pointer;
  padding: 4px;
}

/* ====== Hero / Home ====== */
.hero {
  position: relative;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 60% at 50% 30%, rgba(201,169,110,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 20% 80%, rgba(201,169,110,0.04) 0%, transparent 50%),
    var(--bg-primary);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(255,255,255,0.008) 2px,
    rgba(255,255,255,0.008) 4px
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  animation: fadeInUp 1s ease;
}

.hero-title {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800;
  letter-spacing: 4px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 40px;
  letter-spacing: 1px;
}

.btn-primary {
  display: inline-block;
  padding: 14px 36px;
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 50px;
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
  letter-spacing: 1px;
  transition: all var(--transition);
}
.btn-primary:hover {
  background: var(--accent);
  color: var(--bg-primary);
}

/* Scroll hint */
.scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
}
.scroll-hint span {
  display: block;
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  animation: scrollBounce 2s infinite;
}

/* ====== Section Common ====== */
.section {
  padding: 100px 0;
}
.section-alt {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 4px 14px;
  border-radius: 50px;
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  margin-bottom: 12px;
}
.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
}

/* ====== Business Grid ====== */
.grid-three {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: all var(--transition);
  text-align: center;
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-dim);
  transform: translateY(-4px);
}

.card-icon {
  font-size: 28px;
  color: var(--accent);
  margin-bottom: 16px;
}

.card h3 {
  font-size: 20px;
  margin-bottom: 12px;
  font-weight: 600;
}
.card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ====== Highlights ====== */
.highlights {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 60px;
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

.highlight-item {
  text-align: center;
}
.highlight-num {
  display: block;
  font-size: 36px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 1px;
}
.highlight-label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ====== Team ====== */
.grid-four {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  transition: all var(--transition);
}
.team-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-dim);
  transform: translateY(-4px);
}

.team-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-dim), var(--accent));
  color: var(--bg-primary);
  font-size: 28px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.team-card h3 {
  font-size: 18px;
  margin-bottom: 4px;
}

.team-role {
  display: block;
  font-size: 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.team-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ====== Contact ====== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.contact-item:last-child { border: none; }

.contact-icon {
  font-size: 20px;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-item h4 {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 400;
  margin-bottom: 4px;
}
.contact-item p {
  font-size: 15px;
  color: var(--text-primary);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  transition: border-color var(--transition);
  outline: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--accent-dim);
}

.contact-form textarea { resize: vertical; min-height: 120px; }

.contact-form .btn-primary {
  align-self: flex-start;
  font-size: 14px;
}

/* ====== Footer ====== */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-brand h3 {
  font-size: 22px;
  letter-spacing: 2px;
  margin-bottom: 8px;
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-links h4 {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-weight: 500;
}
.footer-links a {
  display: block;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  margin-bottom: 8px;
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }

.footer-qr p {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-bottom {
  text-align: center;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}

/* ====== Animations ====== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes scrollBounce {
  0%, 100% { opacity: 0.3; transform: rotate(45deg) translateY(0); }
  50%      { opacity: 1;   transform: rotate(45deg) translateY(8px); }
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ====== Responsive ====== */
@media (max-width: 1024px) {
  .grid-three, .grid-four { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  nav {
    position: fixed;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(10,10,10,0.95);
    backdrop-filter: blur(12px);
    flex-direction: column;
    gap: 0;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    transition: transform var(--transition);
    padding: 12px 0;
  }
  nav.open { transform: translateY(0); }

  nav a {
    padding: 14px 24px;
    margin: 0;
  }
  nav a::after { display: none; }

  .menu-toggle { display: block; }

  .highlights { grid-template-columns: repeat(2, 1fr); }
  .grid-three, .grid-four { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}