:root {
  --primary: #0e7490;
  --primary-dark: #0b5f74;
  --secondary: #2563eb;
  --bg: #f4f8fb;
  --text: #1f2937;
  --muted: #6b7280;
  --card: #ffffff;
  --border: #e2e8f0;
  --success: #16a34a;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}
.container { width: min(1160px, 92%); margin: 0 auto; }

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255,255,255,.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.nav-wrap { display: flex; justify-content: space-between; align-items: center; min-height: 68px; gap: 16px; }
.logo { font-size: 1.15rem; font-weight: 800; color: #0f172a; }
nav { display: flex; gap: 16px; flex-wrap: wrap; }
nav a { text-decoration: none; color: #334155; font-weight: 600; }
nav a:hover { color: var(--primary); }

.hero {
  padding: 70px 0 56px;
  background: radial-gradient(circle at top right, #dff5ff 0%, #eef7ff 34%, #ffffff 100%);
  border-bottom: 1px solid var(--border);
}
.hero-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 22px; align-items: center; }
.eyebrow { color: var(--primary); font-weight: 700; margin: 0 0 8px; }
.hero h1 { margin: 0; font-size: clamp(1.8rem, 2.8vw, 2.6rem); line-height: 1.25; }
.subtitle { margin-top: 14px; font-weight: 700; color: #0f172a; }
.hero-actions { margin-top: 22px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero-visual img {
  width: 100%;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: 0 18px 40px rgba(15, 23, 42, .12);
}

.btn {
  display: inline-block; padding: 11px 18px; border-radius: 12px; border: 1px solid transparent;
  text-decoration: none; font-weight: 700; cursor: pointer;
}
.btn-primary { background: linear-gradient(90deg, var(--primary), var(--secondary)); color: #fff; }
.btn-primary:hover { filter: brightness(0.95); }
.btn-secondary { background: #fff; border-color: #bfdbfe; color: var(--primary); }

.section { padding: 54px 0; }
.section-alt { background: #fff; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
h2 { margin: 0 0 22px; font-size: 1.85rem; }

.grid { display: grid; gap: 16px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }

.card, .case-card, .contact-card, .form, .scene-item, .metric-card, .process-item, .cta-bar {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover, .case-card:hover, .scene-item:hover, .metric-card:hover, .process-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(15, 23, 42, .08);
  border-color: #bfdbfe;
}

.tag { color: var(--success); font-weight: 700; }

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 12px;
}
.metric-card h3 { margin: 0; font-size: 1.6rem; color: #0f172a; }
.metric-card p { margin: 6px 0 0; color: var(--muted); }

.capacity-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: center;
}
.capacity-image img {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--border);
}
.list-check { margin: 0; padding-left: 0; list-style: none; display: grid; gap: 8px; }
.list-check li::before { content: "✓"; color: var(--success); margin-right: 8px; font-weight: 800; }

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 14px;
}
.process-item span {
  display: inline-block;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 6px;
}
.process-item h3 { margin: 0 0 4px; }
.process-item p { margin: 0; color: var(--muted); }

.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 14px;
}
.scene-item { margin: 0; overflow: hidden; padding: 0; }
.scene-item img { width: 100%; height: 220px; object-fit: cover; display: block; }
.scene-item figcaption { font-weight: 700; text-align: center; padding: 12px; }

.cta-bar { text-align: center; }
.cta-bar h2 { margin-bottom: 10px; }
.cta-bar p { margin: 0; color: var(--muted); }

.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 16px; }
.form { display: grid; gap: 12px; }

.site-footer { text-align: center; color: var(--muted); padding: 26px 0 40px; }

.reveal { opacity: 0; transform: translateY(16px); }
.reveal.in { opacity: 1; transform: translateY(0); transition: opacity .6s ease, transform .6s ease; }

@media (max-width: 980px) {
  .hero-layout,
  .capacity-layout,
  .grid-3,
  .contact-grid,
  .process-grid,
  .metrics-grid,
  .scene-grid { grid-template-columns: 1fr; }
}

@media (max-width: 580px) {
  .nav-wrap { flex-direction: column; align-items: flex-start; padding: 10px 0; }
  nav { gap: 12px; }
}

.floating-tools {
  position: fixed;
  right: 16px;
  bottom: 18px;
  display: grid;
  gap: 10px;
  z-index: 60;
}
.float-btn {
  border: 0;
  border-radius: 999px;
  padding: 10px 14px;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
  text-align: center;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  box-shadow: 0 10px 24px rgba(15, 23, 42, .18);
  cursor: pointer;
}
.float-btn:hover { filter: brightness(.95); }
.float-btn-call { background: linear-gradient(90deg, #0f766e, #059669); }

.modal {
  position: fixed;
  inset: 0;
  display: none;
  z-index: 80;
}
.modal.open { display: block; }
.modal-mask {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, .5);
}
.modal-panel {
  position: relative;
  width: min(360px, 92vw);
  margin: 10vh auto 0;
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: 0 24px 50px rgba(15, 23, 42, .25);
}
.modal-panel h3 { margin: 0 0 6px; }
.modal-panel p { margin: 0 0 12px; color: var(--muted); }
.modal-panel img {
  width: 220px;
  max-width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
}
.modal-close {
  position: absolute;
  right: 10px;
  top: 8px;
  border: 0;
  background: transparent;
  font-size: 24px;
  color: #475569;
  cursor: pointer;
}

@media (max-width: 580px) {
  .floating-tools { right: 12px; bottom: 12px; gap: 8px; }
  .float-btn { padding: 9px 12px; font-size: 14px; }
}


.faq-list {
  display: grid;
  gap: 12px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  color: #0f172a;
}
.faq-item p {
  margin: 10px 0 0;
  color: var(--muted);
}


.case-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.case-icon {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  color: #fff;
  font-weight: 800;
  font-size: 14px;
}
.case-sub {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 14px;
}
.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0;
}
.data-tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 13px;
  color: #0f172a;
  background: #eef6ff;
  border: 1px solid #cfe2ff;
}