:root {
  --accent: #0071e3;
  --accent-2: #35a7ff;
  --gold: #c99a3d;
  --bg: #fbfbfd;
  --surface: #fff;
  --surface-alt: #f5f5f7;
  --ink: #1d1d1f;
  --ink-2: #424245;
  --ink-3: #6e6e73;
  --ink-4: #86868b;
  --line: #e5e5ea;
  --radius: 16px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.04), 0 2px 8px rgba(0,0,0,.04);
  --shadow: 0 2px 8px rgba(0,0,0,.05), 0 8px 24px rgba(0,0,0,.06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
main { max-width: 1200px; margin: 0 auto; padding: 48px 32px 96px; }
.hero { padding: 0 0 56px; }
.brand-logo { display: block; width: 154px; height: auto; margin-bottom: 44px; }
.eyebrow, .section-kicker, .panel-label {
  color: var(--ink-4);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  margin-bottom: 20px;
  max-width: 980px;
  font-size: clamp(42px, 6vw, 68px);
  line-height: 1.02;
  letter-spacing: -.045em;
}
h1 span { color: var(--ink-4); }
h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.08;
  letter-spacing: -.035em;
}
h3 { margin-bottom: 0; font-size: 20px; line-height: 1.25; letter-spacing: -.02em; }
.hero-copy { max-width: 800px; color: var(--ink-2); font-size: 19px; line-height: 1.55; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 11px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: transform .2s ease, box-shadow .2s ease;
}
.button:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.button-primary { border-color: var(--accent); background: var(--accent); color: #fff; }
.button-secondary { background: var(--surface); }
.scope-note {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 78px;
  padding: 20px 22px;
  border: 1px solid #bad9fb;
  border-radius: var(--radius);
  background: #eef6ff;
  color: #15395e;
}
.scope-note p { margin: 2px 0 0; color: #375d83; }
.scope-icon {
  display: grid;
  width: 26px;
  height: 26px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
}
.block { margin-bottom: 86px; }
.section-kicker { margin-bottom: 10px; }
.section-intro { max-width: 820px; margin-bottom: 28px; color: var(--ink-3); font-size: 17px; }
.kpi-grid, .action-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.kpi-card, .panel, .action-card, .insight-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}
.kpi-card { min-height: 172px; padding: 22px 24px; }
.kpi-label { display: block; color: var(--ink-3); font-size: 13px; font-weight: 600; }
.kpi-card strong { display: block; margin: 12px 0 8px; font-size: clamp(34px, 4vw, 48px); line-height: 1; letter-spacing: -.04em; }
.kpi-card small { color: var(--ink-4); line-height: 1.35; }
.kpi-accent { background: var(--accent); color: #fff; border-color: var(--accent); }
.kpi-accent .kpi-label, .kpi-accent small { color: rgba(255,255,255,.76); }
.chart-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.panel { padding: 26px; overflow: hidden; }
.wide-panel { padding-top: 30px; }
.donut-wrap { display: grid; grid-template-columns: 190px 1fr; gap: 28px; align-items: center; margin-top: 28px; }
.donut {
  position: relative;
  width: 182px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: conic-gradient(var(--accent) 0 33.65%, var(--accent-2) 33.65% 59.62%, var(--gold) 59.62% 74.04%, #d2d2d7 74.04% 100%);
}
.donut::after { content: ""; position: absolute; inset: 26px; border-radius: 50%; background: var(--surface); }
.donut-center { position: absolute; z-index: 1; inset: 0; display: grid; place-content: center; text-align: center; }
.donut-center strong { font-size: 34px; line-height: 1; }
.donut-center span { color: var(--ink-4); font-size: 12px; }
.legend { display: grid; gap: 11px; margin: 0; padding: 0; list-style: none; }
.legend li { display: grid; grid-template-columns: 10px 28px 1fr; gap: 8px; align-items: center; color: var(--ink-2); font-size: 13px; }
.legend small { display: block; color: var(--ink-4); }
.dot { width: 9px; height: 9px; border-radius: 50%; }
.dot-blue { background: var(--accent); } .dot-cyan { background: var(--accent-2); }
.dot-gold { background: var(--gold); } .dot-gray { background: #d2d2d7; }
.bar-chart { display: grid; gap: 16px; margin-top: 30px; }
.bar-row { display: grid; gap: 7px; }
.bar-meta { display: flex; justify-content: space-between; gap: 20px; color: var(--ink-2); font-size: 13px; }
.bar-meta strong { color: var(--ink); }
.bar-track { height: 10px; border-radius: 999px; background: var(--surface-alt); overflow: hidden; }
.bar-fill { width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--accent), #55b4ff); transition: width 900ms cubic-bezier(.2,.8,.2,1); }
.bar-fill.gold { background: linear-gradient(90deg, #aa7921, #ddb85f); }
.bar-fill.gray { background: linear-gradient(90deg, #9b9ba1, #c7c7cc); }
.bar-chart-wide .bar-track { height: 12px; }
.chart-note { margin: 24px 0 0; color: var(--ink-4); font-size: 12px; }
code { padding: 2px 6px; border-radius: 6px; background: #e8e8ed; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-size: .9em; }
.utm-section {
  padding: 48px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface-alt);
}
.insight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 30px 0 16px; }
.insight-card { display: flex; gap: 18px; padding: 22px; }
.insight-number { color: var(--accent); font-size: 34px; font-weight: 800; line-height: 1; letter-spacing: -.04em; }
.insight-card p { margin: 4px 0 0; color: var(--ink-3); font-size: 13px; line-height: 1.45; }
.campaign-panel { background: var(--surface); }
.panel-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.panel-heading a { color: var(--accent); font-size: 13px; font-weight: 700; text-decoration: none; }
.campaign-list { display: grid; margin-top: 22px; }
.campaign-row { display: grid; grid-template-columns: minmax(0, 2fr) 72px 92px; gap: 18px; align-items: center; padding: 15px 0; border-top: 1px solid var(--line); }
.campaign-name { min-width: 0; }
.campaign-name strong { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; }
.campaign-name small { color: var(--ink-4); }
.campaign-stat { text-align: right; }
.campaign-stat strong { display: block; font-size: 16px; }
.campaign-stat small { color: var(--ink-4); font-size: 11px; }
.usage-rate { color: var(--accent); }
.pattern-list { display: grid; gap: 17px; margin: 28px 0 0; padding: 0; list-style: none; }
.pattern-list li { display: grid; grid-template-columns: 34px 1fr; gap: 12px; }
.pattern-list li > span { color: var(--accent); font-size: 12px; font-weight: 800; }
.pattern-list p { margin: 2px 0 0; color: var(--ink-3); font-size: 13px; }
.action-card { min-height: 205px; padding: 24px; }
.action-card > span { display: inline-block; margin-bottom: 34px; color: var(--accent); font-size: 12px; font-weight: 800; }
.action-card h3 { margin-bottom: 8px; }
.action-card p { margin: 0; color: var(--ink-3); font-size: 14px; }
.file-library { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.file-link-card {
  display: flex;
  min-height: 230px;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.file-link-card:hover { transform: translateY(-2px); border-color: #bad9fb; box-shadow: var(--shadow); }
.file-link-card > span { align-self: flex-start; padding: 4px 8px; border-radius: 6px; background: #eef6ff; color: var(--accent); font-size: 10px; font-weight: 800; }
.file-link-card h3 { margin: 28px 0 8px; }
.file-link-card p { margin: 0 0 22px; color: var(--ink-3); font-size: 13px; }
.file-link-card b { margin-top: auto; color: var(--accent); font-size: 13px; }
.method { display: grid; grid-template-columns: .8fr 1.2fr; gap: 64px; padding: 42px; border-radius: 24px; background: var(--ink); color: #fff; }
.method h2 { margin-top: 6px; font-size: 34px; }
.method-copy p { color: #c7c7cc; }
.method-copy p:last-child { margin-bottom: 0; }
footer {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 20px;
  align-items: center;
  padding: 32px max(32px, calc((100vw - 1136px) / 2));
  border-top: 1px solid var(--line);
  background: var(--surface);
}
footer img { width: 76px; height: auto; }
footer strong, footer span { display: block; }
footer span, footer small { color: var(--ink-4); font-size: 12px; }
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .kpi-grid, .action-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .file-library { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chart-grid, .method { grid-template-columns: 1fr; }
  .insight-grid { grid-template-columns: 1fr; }
  .utm-section { padding: 32px 24px; }
}
@media (max-width: 620px) {
  main { padding: 28px 18px 64px; }
  .brand-logo { margin-bottom: 34px; }
  .kpi-grid, .action-grid { grid-template-columns: 1fr; }
  .file-library { grid-template-columns: 1fr; }
  .donut-wrap { grid-template-columns: 1fr; }
  .donut { margin: 0 auto; }
  .campaign-row { grid-template-columns: minmax(0, 1fr) 62px; }
  .campaign-stat:last-child { display: none; }
  .method { padding: 28px 22px; gap: 24px; }
  footer { grid-template-columns: auto 1fr; padding: 28px 18px; }
  footer small { grid-column: 1 / -1; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .bar-fill, .button { transition: none; }
}