/* ===== Variables ===== */
:root {
  --bg-dark: #0a0a0f;
  --bg-card: #12121a;
  --bg-elevated: #1a1a26;
  --accent: #e8a849;
  --accent-light: #f5c76a;
  --accent-glow: rgba(232, 168, 73, 0.15);
  --text-primary: #f0ece4;
  --text-secondary: #9a9590;
  --text-muted: #5c5854;
  --border: rgba(255, 255, 255, 0.06);
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Noto Sans SC', -apple-system, sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(1120px, 90vw);
  margin: 0 auto;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 0;
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0.875rem 0;
}

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

.logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-cn {
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.logo-en {
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.35em;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 0 4rem;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, var(--accent-glow), transparent),
    radial-gradient(ellipse 50% 40% at 80% 60%, rgba(120, 60, 200, 0.08), transparent),
    linear-gradient(180deg, var(--bg-dark) 0%, #0d0d14 100%);
}

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black, transparent);
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 720px;
}

.hero-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(232, 168, 73, 0.25);
  border-radius: 100px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 2.5rem;
  font-weight: 300;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.8rem 2rem;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 6px;
  transition: var(--transition);
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-dark);
}

.btn-primary:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(232, 168, 73, 0.25);
}

.btn-outline {
  border: 1px solid var(--border);
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-muted);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ===== Sections ===== */
.section {
  padding: 6rem 0;
}

.section-header {
  margin-bottom: 3.5rem;
}

.section-label {
  display: block;
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
}

/* ===== About ===== */
.about {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-lead {
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-weight: 300;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.stat-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  text-align: center;
  transition: var(--transition);
}

.stat-card:hover {
  border-color: rgba(232, 168, 73, 0.3);
  transform: translateY(-3px);
}

.stat-number {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== Business ===== */
.business-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.business-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  transition: var(--transition);
}

.business-card:hover {
  border-color: rgba(232, 168, 73, 0.25);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow);
  border-radius: 10px;
  margin-bottom: 1.25rem;
  color: var(--accent);
}

.card-icon svg {
  width: 22px;
  height: 22px;
}

.business-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.business-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 300;
  line-height: 1.65;
}

/* ===== Contact ===== */
.contact-box {
  background: linear-gradient(135deg, var(--bg-card), var(--bg-elevated));
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.contact-box::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  pointer-events: none;
}

.contact-info {
  position: relative;
}

.contact-info h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  margin-bottom: 1rem;
}

.contact-info > p {
  color: var(--text-secondary);
  max-width: 480px;
  margin: 0 auto 2rem;
  font-weight: 300;
}

.contact-email {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--accent);
  padding: 0.75rem 1.5rem;
  border: 1px solid rgba(232, 168, 73, 0.3);
  border-radius: 8px;
  transition: var(--transition);
  margin-bottom: 1.5rem;
}

.contact-email svg {
  width: 20px;
  height: 20px;
}

.contact-email:hover {
  background: var(--accent-glow);
  transform: translateY(-2px);
}

.company-name {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ===== Footer ===== */
.footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.footer-cn {
  color: var(--text-secondary) !important;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .business-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    max-width: 280px;
    height: 100vh;
    background: var(--bg-card);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: 1.5rem;
    border-left: 1px solid var(--border);
    transition: right var(--transition);
  }

  .nav-links.open {
    right: 0;
  }

  .business-grid {
    grid-template-columns: 1fr;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
  }

  .contact-box {
    padding: 2.5rem 1.5rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .hero-scroll {
    display: none;
  }
}