/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif; background: #fff; color: #1a1a1a; line-height: 1.6; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ── Variables ── */
:root {
  --yellow: #f5c842;
  --dark: #1a1a1a;
  --mid: #444;
  --light: #f5f4f0;
  --border: #e8e8e8;
  --radius: 14px;
  --max: 1080px;
}

/* ── Nav ── */
#nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(26,26,26,0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav-inner {
  max-width: var(--max); margin: 0 auto;
  padding: 0 24px; height: 60px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo { font-size: 22px; font-weight: 300; color: #fff; letter-spacing: -0.5px; }
.logo-local { font-weight: 700; }
.logo-o { color: var(--yellow); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: rgba(255,255,255,0.7); font-size: 14px; transition: color .2s; }
.nav-links a:hover { color: #fff; }
.btn-nav {
  background: var(--yellow); color: var(--dark) !important;
  padding: 8px 18px; border-radius: 8px;
  font-weight: 700; font-size: 13px !important;
  transition: opacity .2s;
}
.btn-nav:hover { opacity: 0.85; }
.nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 22px; cursor: pointer; }
.nav-mobile { display: none; flex-direction: column; padding: 12px 24px 16px; gap: 14px; border-top: 1px solid rgba(255,255,255,0.08); }
.nav-mobile a { color: rgba(255,255,255,0.8); font-size: 15px; }
.nav-mobile.open { display: flex; }

/* ── Hero ── */
#hero {
  min-height: 100vh;
  background: var(--dark);
  display: flex; flex-direction: column;
  justify-content: center; align-items: center;
  text-align: center;
  padding: 100px 24px 60px;
  position: relative;
  overflow: hidden;
}
.hero-video {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  min-width: 100%; min-height: 100%;
  width: auto; height: auto;
  object-fit: cover;
  z-index: 0;
}
.hero-overlay {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(10,10,10,0.72) 0%, rgba(20,20,20,0.60) 50%, rgba(10,20,10,0.68) 100%);
  z-index: 1;
}
/* Ambient glow blobs */
#hero::before {
  content: '';
  position: absolute; top: -100px; right: -100px;
  width: 500px; height: 500px; border-radius: 50%;
  background: radial-gradient(circle, rgba(245,200,66,0.08) 0%, transparent 65%);
  pointer-events: none;
  z-index: 2;
}
#hero::after {
  content: '';
  position: absolute; bottom: -80px; left: -80px;
  width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, rgba(50,180,80,0.06) 0%, transparent 65%);
  pointer-events: none;
  z-index: 2;
}
.hero-content { position: relative; max-width: 720px; z-index: 3; }
.hero-tag {
  display: inline-block;
  font-size: 12px; font-weight: 600; letter-spacing: 2px; text-transform: uppercase;
  color: var(--yellow); background: rgba(245,200,66,0.1);
  padding: 6px 14px; border-radius: 20px; margin-bottom: 24px;
}
#hero h1 {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800; color: #fff;
  line-height: 1.1; letter-spacing: -1.5px;
  margin-bottom: 20px;
}
.hero-sub { font-size: 18px; color: rgba(255,255,255,0.6); max-width: 520px; margin: 0 auto 36px; line-height: 1.7; }
.hero-ctas { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-scroll { position: absolute; bottom: 32px; font-size: 12px; color: rgba(255,255,255,0.3); letter-spacing: 2px; }

/* ── Buttons ── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: #25d366; color: #fff;
  padding: 14px 24px; border-radius: 10px;
  font-weight: 700; font-size: 15px;
  transition: opacity .2s;
}
.btn-primary:hover { opacity: 0.88; }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.1); color: #fff;
  border: 1px solid rgba(255,255,255,0.2);
  padding: 14px 24px; border-radius: 10px;
  font-weight: 600; font-size: 15px;
  transition: background .2s;
}
.btn-secondary:hover { background: rgba(255,255,255,0.16); }
.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  background: transparent; color: var(--dark);
  border: 2px solid var(--dark);
  padding: 14px 24px; border-radius: 10px;
  font-weight: 700; font-size: 15px;
  transition: background .2s, color .2s;
}
.btn-outline:hover { background: var(--dark); color: #fff; }
.btn-primary.large, .btn-outline.large { padding: 16px 32px; font-size: 16px; }
.btn-card {
  display: inline-block; margin-top: 20px;
  background: var(--dark); color: #fff;
  padding: 10px 20px; border-radius: 8px;
  font-size: 14px; font-weight: 600;
  transition: opacity .2s;
}
.btn-card:hover { opacity: 0.75; }
.featured .btn-card { background: var(--yellow); color: var(--dark); }

/* ── Sections ── */
.section-inner { max-width: var(--max); margin: 0 auto; padding: 80px 24px; }
.section-label {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 2px; color: #999; margin-bottom: 10px;
}
h2 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; letter-spacing: -1px; margin-bottom: 40px; }

/* ── Products ── */
#products { background: var(--light); }
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.product-card {
  background: #fff; border-radius: var(--radius);
  padding: 28px; border: 1px solid var(--border);
  display: flex; flex-direction: column;
  transition: box-shadow .2s, transform .2s;
}
.product-card:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.08); transform: translateY(-2px); }
.product-card.featured { border-color: var(--yellow); box-shadow: 0 4px 20px rgba(245,200,66,0.15); }
.product-icon { font-size: 32px; margin-bottom: 14px; }
.product-tag {
  display: inline-block; font-size: 11px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 1px;
  padding: 3px 10px; border-radius: 20px; margin-bottom: 10px;
}
.tag-lead { background: #fff3cd; color: #856404; }
.tag-main { background: #d1ecf1; color: #0c5460; }
.tag-custom { background: #e8d5f5; color: #5a2d82; }
.product-price { font-size: 22px; margin-bottom: 12px; color: #555; }
.product-price strong { font-size: 28px; color: var(--dark); }
.product-card p { font-size: 14px; color: #666; margin-bottom: 16px; line-height: 1.6; }
.product-card ul { flex: 1; }
.product-card ul li { font-size: 13px; color: #555; padding: 5px 0; border-bottom: 1px solid #f5f5f5; }
.product-card ul li::before { content: '✓ '; color: var(--yellow); font-weight: 700; }

/* ── Routes ── */
.routes-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.route-card {
  padding: 28px; border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: border-color .2s;
}
.route-card:hover { border-color: var(--yellow); }
.route-num { font-size: 48px; font-weight: 800; color: #f0f0f0; line-height: 1; margin-bottom: 8px; }
.route-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.route-card p { font-size: 14px; color: #666; margin-bottom: 16px; line-height: 1.6; }
.route-meta { display: flex; gap: 10px; flex-wrap: wrap; }
.route-meta span {
  font-size: 12px; font-weight: 600; color: #555;
  background: var(--light); padding: 4px 10px; border-radius: 20px;
}

/* ── How it works ── */
#how { background: var(--dark); }
#how h2, #how .section-label { color: #fff; }
#how .section-label { color: rgba(255,255,255,0.4); }
.steps { display: flex; align-items: flex-start; gap: 0; }
.step { flex: 1; padding: 0 20px; }
.step-num {
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--yellow); color: var(--dark);
  font-size: 20px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.step h3 { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.step p { font-size: 14px; color: rgba(255,255,255,0.55); line-height: 1.7; }
.step-arrow { font-size: 28px; color: rgba(255,255,255,0.15); padding-top: 12px; flex-shrink: 0; }

/* ── About ── */
#about { background: var(--light); }
.about-inner { display: grid; grid-template-columns: 1fr auto; gap: 60px; align-items: center; }
.about-text p { font-size: 16px; color: #555; margin-bottom: 16px; line-height: 1.8; max-width: 520px; }
.about-stats { display: flex; flex-direction: column; gap: 24px; }
.stat { text-align: center; padding: 20px 32px; background: #fff; border-radius: var(--radius); border: 1px solid var(--border); }
.stat strong { display: block; font-size: 28px; font-weight: 800; }
.stat span { font-size: 12px; color: #888; text-transform: uppercase; letter-spacing: 1px; }

/* ── FAQ ── */
#faq { background: #fff; }
.faq-list { display: flex; flex-direction: column; gap: 20px; max-width: 800px; }
.faq-item { padding: 24px; border-radius: var(--radius); border: 1px solid var(--border); transition: border-color .2s; }
.faq-item:hover { border-color: var(--yellow); }
.faq-q { font-size: 16px; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.faq-a { font-size: 14px; color: #666; line-height: 1.7; }

/* ── Contact ── */
#contact { background: #fff; }
.contact-inner { text-align: center; max-width: 560px; }
.contact-sub { font-size: 17px; color: #666; margin-bottom: 32px; }
.contact-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 20px; }
.wechat-note { font-size: 13px; color: #aaa; }

/* ── Footer ── */
footer { background: var(--dark); padding: 40px 24px; }
.footer-inner { max-width: var(--max); margin: 0 auto; text-align: center; }
footer .logo { font-size: 24px; color: #fff; margin-bottom: 4px; display: block; }
.footer-tagline { font-size: 12px; color: rgba(255,255,255,0.3); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 20px; }
.footer-links { display: flex; gap: 24px; justify-content: center; margin-bottom: 20px; }
.footer-links a { font-size: 13px; color: rgba(255,255,255,0.5); transition: color .2s; }
.footer-links a:hover { color: #fff; }
.footer-copy { font-size: 12px; color: rgba(255,255,255,0.25); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .products-grid, .routes-grid { grid-template-columns: 1fr; }
  .steps { flex-direction: column; gap: 32px; }
  .step-arrow { display: none; }
  .about-inner { grid-template-columns: 1fr; }
  .about-stats { flex-direction: row; flex-wrap: wrap; justify-content: center; }
  .stat { padding: 16px 24px; }
  #hero h1 { letter-spacing: -0.5px; }
}