:root {
  --ink: #17203a;
  --ink-soft: #4a5568;
  --line: #e2e8f0;
  --bg: #ffffff;
  --bg-alt: #f5f7fb;
  --accent: #185adb;
  --accent-dark: #124bbd;
  --radius: 14px;
  font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--ink);
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); line-height: 1.7; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); }
.wrap { width: min(1080px, calc(100% - 40px)); margin: 0 auto; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #fff; padding: 8px 14px; z-index: 99;
}
.skip:focus { left: 8px; top: 8px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 0; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 700; font-size: 1.15rem; }
.brand img { border-radius: 8px; }
.site-header nav { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
.site-header nav a { color: var(--ink-soft); text-decoration: none; font-size: .95rem; }
.site-header nav a:hover { color: var(--accent); }
.nav-cta {
  color: #fff !important; background: var(--accent);
  padding: 8px 16px; border-radius: 999px;
}
.nav-cta:hover { background: var(--accent-dark); }

/* Hero */
.hero { padding: 56px 0 0; }
.eyebrow, .kicker {
  color: var(--accent); font-weight: 600; letter-spacing: .04em;
  font-size: .92rem; margin: 0 0 10px;
}
.hero h1 { font-size: clamp(1.9rem, 4.6vw, 3rem); line-height: 1.25; margin: 0 0 18px; max-width: 18em; }
.lede { font-size: clamp(1.02rem, 2vw, 1.2rem); color: var(--ink-soft); max-width: 44em; margin: 0 0 26px; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; text-decoration: none; font-weight: 600;
  padding: 13px 26px; border-radius: 10px; font-size: 1rem; cursor: pointer;
  border: 0; font-family: inherit;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost { border: 1px solid var(--line); color: var(--ink); background: #fff; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.hero-figure { margin: 44px auto 0; }
.hero-figure img { width: 100%; border-radius: var(--radius) var(--radius) 0 0; }

/* Facts */
.facts { background: var(--ink); color: #fff; padding: 34px 0; }
.facts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 22px; }
.fact strong { display: block; font-size: 1.35rem; margin-bottom: 4px; }
.fact span { color: #c3cbdd; font-size: .95rem; }

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: var(--bg-alt); }
.section h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); margin: 0 0 14px; }
.section-intro { color: var(--ink-soft); max-width: 46em; margin: 0 0 36px; }

.tri-grid, .quad-grid { display: grid; gap: 22px; }
.tri-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.quad-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.tri-grid article, .quad-grid article {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px;
}
.section-alt .tri-grid article, .section-alt .quad-grid article { background: var(--bg); }
.tri-grid h3, .quad-grid h3 { margin: 0 0 10px; font-size: 1.15rem; }
.tri-grid p, .quad-grid p { margin: 0; color: var(--ink-soft); }

/* Services */
.service-list { display: grid; gap: 28px; }
.service {
  display: grid; grid-template-columns: 300px 1fr; gap: 28px;
  background: var(--bg); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px; align-items: center;
}
.service img { border-radius: 10px; width: 100%; }
.service h3 { margin: 0 0 10px; font-size: 1.3rem; }
.service p { margin: 0 0 10px; color: var(--ink-soft); }
.tags { color: var(--accent); font-size: .92rem; font-weight: 600; }

/* Split */
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px; align-items: center; }
.split figure img { border-radius: var(--radius); width: 100%; }
.steps { padding-left: 20px; color: var(--ink-soft); }
.steps li { margin-bottom: 10px; }
.timeline { list-style: none; padding: 0; }
.timeline li { border-left: 3px solid var(--accent); padding: 4px 0 4px 16px; margin-bottom: 14px; color: var(--ink-soft); }
.timeline strong { color: var(--ink); }

/* Clients */
.logo-grid {
  list-style: none; padding: 0; margin: 0;
  display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 18px;
}
.logo-grid li {
  background: var(--bg); border: 1px solid var(--line); border-radius: 12px;
  padding: 18px 14px; text-align: center;
  display: grid; gap: 10px; justify-items: center; align-content: start;
}
.logo-grid img { max-height: 44px; width: auto; object-fit: contain; }
.logo-grid span { font-size: .85rem; color: var(--ink-soft); }

/* Founder */
.bio-list { padding-left: 20px; color: var(--ink-soft); }
.bio-list li { margin-bottom: 10px; }
.bio-note { color: var(--ink-soft); font-size: .95rem; border-top: 1px solid var(--line); padding-top: 16px; }

/* FAQ */
.faq-list { display: grid; gap: 12px; max-width: 56em; }
.faq-list details {
  background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 18px 22px;
}
.faq-list summary { font-weight: 600; cursor: pointer; font-size: 1.02rem; }
.faq-list details p { color: var(--ink-soft); margin: 12px 0 0; }

/* CTA */
.cta-section { text-align: center; }
.cta-section p { color: var(--ink-soft); max-width: 36em; margin: 0 auto 26px; }
.cta-section .cta-row { justify-content: center; }

/* Visitor inquiry floating widget */
.inquiry-fab {
  position: fixed; right: 22px; bottom: 22px; z-index: 60;
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--accent); border: 0; cursor: pointer;
  display: grid; place-items: center;
  box-shadow: 0 8px 24px rgba(24, 90, 219, .35);
}
.inquiry-fab:hover { background: var(--accent-dark); }
.inquiry-fab svg { width: 26px; height: 26px; fill: #fff; }

.inquiry-panel {
  position: fixed; right: 22px; bottom: 90px; z-index: 60;
  width: min(380px, calc(100vw - 32px));
  background: #fff; border: 1px solid var(--line); border-radius: 16px;
  box-shadow: 0 16px 48px rgba(23, 32, 58, .18);
  display: none; overflow: hidden;
}
.inquiry-panel.open { display: block; }
.inquiry-panel-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 18px; background: var(--bg-alt); border-bottom: 1px solid var(--line);
}
.inquiry-panel-head strong { font-size: 1rem; }
.inquiry-close {
  background: none; border: 0; cursor: pointer; font-size: 1.3rem;
  color: var(--ink-soft); line-height: 1; padding: 4px 8px;
}
.inquiry-close:hover { color: var(--ink); }
.inquiry-panel-body { padding: 18px; }
.inquiry-panel-body p { margin: 0 0 14px; color: var(--ink-soft); font-size: .94rem; }
.inquiry-panel form { display: grid; gap: 12px; }
.inquiry-panel label { display: grid; gap: 5px; font-size: .92rem; font-weight: 600; }
.inquiry-panel input, .inquiry-panel textarea {
  font: inherit; padding: 10px 12px; font-weight: 400;
  border: 1px solid #cbd3e1; border-radius: 8px; width: 100%;
}
.inquiry-panel textarea { min-height: 80px; resize: vertical; }
.inquiry-panel fieldset {
  border: 0; padding: 0; margin: 0; display: flex; gap: 16px;
  font-size: .92rem; font-weight: 600;
}
.inquiry-panel fieldset legend { padding: 0 0 5px; }
.inquiry-panel fieldset label { display: flex; align-items: center; gap: 6px; font-weight: 400; }
.inquiry-panel fieldset input { width: auto; }
.inquiry-submit { margin-top: 4px; }
.inquiry-status { margin: 10px 0 0; font-size: .9rem; color: var(--ink-soft); min-height: 1.4em; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 26px 0; text-align: center; color: var(--ink-soft); font-size: .92rem; }
.site-footer a { color: inherit; }

a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}

@media (max-width: 860px) {
  .service { grid-template-columns: 1fr; }
  .split, .split-reverse { grid-template-columns: 1fr; }
  .split-reverse figure { order: 2; }
  .section { padding: 52px 0; }
  .site-header nav { gap: 12px; font-size: .9rem; }
  .inquiry-fab { right: 16px; bottom: 16px; }
  .inquiry-panel { right: 16px; bottom: 82px; }
}