/* SUNGO Mobility Testing Lab — Wheelchair Specialist
   Visual Language: Dark Professional / High Contrast / Data-driven
   完全不同于主站 sungolytest.com（主站为浅色蓝绿圆角风）
*/

* { margin:0; padding:0; box-sizing:border-box; }
:root {
  --bg: #0f1419;
  --bg-card: #1a1f29;
  --bg-elevated: #232832;
  --border: #2d3340;
  --accent: #ff6b35;
  --accent-hover: #ff8555;
  --text: #e8e8ed;
  --text-dim: #9ca3af;
  --text-mute: #6b7280;
  --success: #10b981;
  --link: #60a5fa;
}

html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', 'Helvetica Neue', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(15, 20, 25, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-bar {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; text-decoration: none; color: var(--text); letter-spacing: 0.2px; }
.brand-mark { width: 32px; height: 32px; background: var(--accent); border-radius: 6px; display:flex; align-items:center; justify-content:center; font-weight:900; color:#fff; font-size:16px; }
.nav-links { display: flex; align-items: center; gap: 28px; list-style: none; }
.nav-links a { color: var(--text-dim); text-decoration: none; font-size: 14px; font-weight: 500; transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--accent); }
.lang-toggle { padding: 6px 14px; border: 1px solid var(--border); border-radius: 6px; font-size: 13px; color: var(--text); }

/* ===== Hero ===== */
.hero {
  padding: 120px 0 80px;
  background:
    radial-gradient(ellipse at top right, rgba(255,107,53,0.15), transparent 60%),
    radial-gradient(ellipse at bottom left, rgba(96,165,250,0.10), transparent 60%),
    var(--bg);
}
.hero-eyebrow { font-size: 13px; letter-spacing: 2px; text-transform: uppercase; color: var(--accent); font-weight: 600; margin-bottom: 16px; }
.hero h1 { font-size: clamp(36px, 5vw, 64px); font-weight: 800; line-height: 1.1; letter-spacing: -1.5px; margin-bottom: 24px; }
.hero h1 .accent { color: var(--accent); }
.hero-sub { font-size: 19px; color: var(--text-dim); max-width: 720px; margin-bottom: 40px; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 14px 28px; border-radius: 6px; font-weight: 600; font-size: 15px; text-decoration: none; transition: all .2s; cursor: pointer; border: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ===== Stats Bar ===== */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--border);
  border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden;
  margin-top: 60px;
}
.stat-item { background: var(--bg-card); padding: 32px; text-align: center; }
.stat-num { font-size: 42px; font-weight: 800; color: var(--accent); letter-spacing: -1.5px; line-height: 1; }
.stat-num small { font-size: 22px; vertical-align: top; }
.stat-label { font-size: 13px; color: var(--text-dim); margin-top: 8px; text-transform: uppercase; letter-spacing: 1px; }

/* ===== Section ===== */
section { padding: 80px 0; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-eyebrow { font-size: 13px; letter-spacing: 2px; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; font-weight: 600; }
.section-title { font-size: 38px; font-weight: 700; letter-spacing: -0.5px; margin-bottom: 16px; }
.section-sub { font-size: 17px; color: var(--text-dim); max-width: 680px; margin: 0 auto; }

/* ===== Service Cards ===== */
.service-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 32px;
  transition: all .3s;
  position: relative;
}
.service-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.service-card .icon { font-size: 32px; margin-bottom: 20px; }
.service-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.service-card p { color: var(--text-dim); font-size: 14px; margin-bottom: 20px; }
.service-card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.service-card .tag { font-size: 11px; padding: 3px 10px; background: var(--bg-elevated); border-radius: 20px; color: var(--text-dim); font-weight: 500; letter-spacing: 0.3px; }
.service-card .more { color: var(--accent); font-size: 14px; font-weight: 600; text-decoration: none; }
.service-card .more::after { content: ' →'; transition: transform .2s; display: inline-block; }
.service-card:hover .more::after { transform: translateX(4px); }

/* ===== Standards Grid ===== */
.standards-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.std-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 24px; text-align: center; }
.std-card .std-code { font-size: 18px; font-weight: 700; color: var(--accent); margin-bottom: 8px; font-family: 'JetBrains Mono', monospace; }
.std-card .std-name { font-size: 13px; color: var(--text-dim); }

/* ===== Why us comparison ===== */
.compare-table { width: 100%; border-collapse: collapse; background: var(--bg-card); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.compare-table th, .compare-table td { padding: 18px 24px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.compare-table thead th { background: var(--bg-elevated); font-weight: 700; }
.compare-table tbody tr:last-child td { border-bottom: none; }
.cell-yes { color: var(--success); font-weight: 600; }
.cell-no { color: var(--text-mute); }
.cell-feature { font-weight: 600; }

/* ===== CTA section ===== */
.cta-block { background: linear-gradient(135deg, rgba(255,107,53,0.15), rgba(255,107,53,0.05)); border: 1px solid rgba(255,107,53,0.25); border-radius: 16px; padding: 64px 40px; text-align: center; }
.cta-block h2 { font-size: 32px; margin-bottom: 16px; }
.cta-block p { color: var(--text-dim); margin-bottom: 32px; font-size: 17px; }

/* ===== Footer ===== */
.site-footer { background: #0a0d12; border-top: 1px solid var(--border); padding: 60px 0 30px; margin-top: 60px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-col h4 { font-size: 14px; text-transform: uppercase; letter-spacing: 1px; color: var(--text); margin-bottom: 16px; font-weight: 600; }
.footer-col a, .footer-col p { display: block; color: var(--text-dim); font-size: 14px; text-decoration: none; margin-bottom: 8px; line-height: 1.7; }
.footer-col a:hover { color: var(--accent); }
.footer-brand-text { font-size: 13px; color: var(--text-mute); margin-top: 12px; }
.footer-bottom { padding-top: 24px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; font-size: 12px; color: var(--text-mute); }
.footer-bottom a { color: var(--text-mute); text-decoration: none; }
.footer-bottom a:hover { color: var(--accent); }

/* ===== Service detail page ===== */
.detail-hero { padding: 80px 0 40px; border-bottom: 1px solid var(--border); }
.breadcrumb { font-size: 13px; color: var(--text-mute); margin-bottom: 20px; }
.breadcrumb a { color: var(--text-dim); text-decoration: none; }
.detail-tests { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-top: 30px; }
.test-item { background: var(--bg-card); border-left: 3px solid var(--accent); padding: 20px; border-radius: 0 8px 8px 0; }
.test-item h4 { font-size: 16px; margin-bottom: 6px; }
.test-item p { font-size: 13px; color: var(--text-dim); }

/* ===== Contact form ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.contact-info-item { display: flex; gap: 16px; margin-bottom: 28px; }
.contact-info-item .label { color: var(--text-mute); font-size: 12px; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 4px; }
.contact-info-item .value { color: var(--text); font-size: 15px; font-weight: 500; }
.form-field { margin-bottom: 20px; }
.form-field label { display: block; font-size: 13px; color: var(--text-dim); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.form-field input, .form-field textarea, .form-field select { width: 100%; padding: 12px 16px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 6px; color: var(--text); font-size: 14px; font-family: inherit; }
.form-field input:focus, .form-field textarea:focus { outline: none; border-color: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-links { gap: 16px; }
  .nav-links a:not(.lang-toggle) { display: none; }
  .stats { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 80px 0 60px; }
}