:root {
  --bg-main:        #ffffff;
  --text-primary:   #1a202c;
  --text-secondary: #4a5568;
  --accent:         #8b1a2a;
  --accent-mid:     #b94050;
  --accent-pale:    #f5dfe2;
  --accent-dark:    #5c0f1b;
  --neutral:        #e2e8f0;
  --card-bg:        #f8fafc;
  --font-title:     'Phudu', cursive;
  --font-body:      'Roboto', sans-serif;
  --w-max:          1920px;
  --w-title:        1280px;
  --w-text:         660px;
  --w-image:        1280px;
  --w-box-single:   1200px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 17px; scroll-behavior: smooth; }
body {
  font-family: var(--font-body); color: var(--text-primary);
  background: var(--bg-main); line-height: 1.8;
  overflow-x: hidden; padding-top: 45px;
}

.sp-sticky-header {
  position: fixed; top: 0; left: 0; width: 100%; height: 45px;
  background: #000; display: flex; align-items: center;
  justify-content: space-between; z-index: 99999;
  box-shadow: 0 2px 5px rgba(0,0,0,.5); font-family: 'Roboto', sans-serif;
}
.left-group { display: flex; align-items: center; height: 100%; }
.sp-back-btn {
  display: flex; align-items: center; justify-content: center;
  width: 45px; height: 45px; background: var(--accent); color: #fff;
  text-decoration: none; font-size: 18px; transition: background .3s; cursor: pointer;
}
.sp-back-btn:hover { background: var(--accent-dark); }
.sp-mag-logo { margin-left: 15px; display: flex; align-items: center; text-decoration: none; }
.sp-mag-logo img { height: 24px; width: auto; display: block; }
.center-logo {
  position: absolute; left: 50%; transform: translateX(-50%);
  pointer-events: none; user-select: none;
  display: flex; align-items: center; justify-content: center;
}
.center-logo img { height: 26px; width: auto; }
.right-group { display: flex; align-items: center; padding-right: 15px; }
.fb-share-btn {
  display: flex; align-items: center; gap: 6px; color: #fff;
  text-decoration: none; font-size: 13px; font-weight: bold; cursor: pointer;
  opacity: .9; transition: opacity .2s;
}
.fb-share-btn:hover { opacity: 1; text-decoration: underline; }
.fb-share-btn i { font-size: 15px; }

.wrapper-1920 {
  max-width: var(--w-max); margin: 0 auto; position: relative;
  background: #fff; box-shadow: 0 0 50px rgba(0,0,0,.05);
  padding-bottom: 80px;
}

.cover-title-container {
  width: 100%; max-width: var(--w-title); margin: 0 auto;
  padding: 60px 24px 60px; text-align: center;
  background: #ffffff;
}
.main-title {
  font-family: var(--font-title);
  font-size: clamp(2rem, 4.5vw, 3.6rem);
  line-height: 1.12; color: var(--accent); text-transform: uppercase;
  margin-bottom: 20px;
}
.sub-title {
  font-family: var(--font-body); font-size: 1.15rem;
  font-weight: 700; font-style: normal;
  color: var(--text-secondary); max-width: var(--w-text);
  margin: 0 auto; line-height: 1.65;
}

.col-text { max-width: var(--w-text); margin: 0 auto; padding: 0 20px; }
.col-chart-wide {
  max-width: var(--w-box-single);
  min-width: min(var(--w-text), 100%);
  margin: 1.5rem auto; padding: 0 20px;
}

h2, h3 {
  font-family: var(--font-title); font-weight: 700;
  color: var(--text-primary); text-align: center;
  margin-top: 1.5rem; margin-bottom: 1.5rem;
}
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
p { margin-bottom: 1.5rem; font-size: 1.1rem; color: #2d3748; text-align: justify; }

.section-kicker {
  max-width: var(--w-text); margin: 2.5rem auto .3rem; padding: 0 20px;
  font-family: var(--font-body); font-size: .68rem; font-weight: 700;
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--accent); display: flex; align-items: center; gap: 10px;
}
.section-kicker::after {
  content: ''; flex: 1; height: 1px;
  background: linear-gradient(90deg, var(--accent-pale), transparent);
}

.chart-box {
  background: var(--card-bg); padding: 28px 24px 20px;
  border-radius: 16px; border: 1px solid #edf2f7;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 12px rgba(139,26,42,.05);
  overflow: hidden;
}
.chart-box h3 {
  margin-top: 0; text-align: left;
  font-size: 1.05rem; font-family: var(--font-body);
  font-weight: 700; letter-spacing: .05em; color: var(--text-primary);
  border-left: 3px solid var(--accent); padding-left: 12px;
  margin-bottom: 20px;
}
.chart-box--centered h3 { text-align: center; border-left: none; padding-left: 0; }
.chart-box--centered .chart-note { text-align: center; }
.chart-note { font-size: .75rem; color: #888; font-style: italic; margin-top: 12px; }

.chart-canvas-wrap {
  position: relative; width: 100%;
  max-width: 560px; margin: 0 auto; height: 280px;
}
.chart-canvas-wrap--bar { max-width: 680px; height: 300px; }
@media (max-width: 600px) {
  .chart-canvas-wrap      { height: 240px; }
  .chart-canvas-wrap--bar { height: 240px; }
}
@media (max-width: 380px) {
  .chart-canvas-wrap      { height: 200px; }
  .chart-canvas-wrap--bar { height: 200px; }
}

.dual-chart-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 8px;
}
.dual-panel { display: flex; flex-direction: column; align-items: center; }
.dual-label {
  font-family: var(--font-body); font-size: .72rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: .12em;
  color: var(--text-secondary); margin-bottom: 10px; text-align: center;
}
.dual-canvas-wrap { position: relative; width: 100%; height: 210px; }
@media (max-width: 600px) {
  .dual-chart-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .dual-canvas-wrap { height: 170px; }
}
@media (max-width: 480px) {
  .dual-chart-grid { grid-template-columns: 1fr; gap: 24px; }
  .dual-canvas-wrap { height: 220px; }
}

.heatmap-wrap {
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  scrollbar-width: thin; scrollbar-color: var(--accent) #f1f1f1;
}
.heatmap-wrap::-webkit-scrollbar { height: 4px; }
.heatmap-wrap::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 4px; }
.heatmap-table {
  width: 100%; border-collapse: separate; border-spacing: 4px;
  font-family: var(--font-body); font-size: .82rem;
  min-width: 380px;
}
.heatmap-table th {
  padding: 7px 10px; font-size: .68rem; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase; text-align: center;
  color: var(--text-secondary); white-space: nowrap;
}
.heatmap-table th.q-header {
  font-size: .72rem; color: var(--accent); padding-bottom: 3px;
  border-bottom: 2px solid var(--accent-pale);
}
.heatmap-table .age-label {
  padding: 10px 14px; font-weight: 700; font-size: .88rem;
  color: var(--text-primary); white-space: nowrap;
  background: var(--card-bg); border-radius: 8px;
}
.heat-cell {
  padding: 12px 10px; text-align: center; border-radius: 10px;
  font-weight: 700; font-size: .9rem; transition: transform .2s;
  cursor: default; min-width: 90px;
}
.heat-cell:hover { transform: scale(1.06); }
.heatmap-legend {
  display: flex; gap: 20px; justify-content: center;
  flex-wrap: wrap; margin-top: 16px; font-size: .75rem;
  color: var(--text-secondary);
}
.legend-item { display: flex; align-items: center; gap: 6px; }
.legend-swatch { width: 14px; height: 14px; border-radius: 4px; flex-shrink: 0; }

.global-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 20px; margin-top: 1.5rem;
}
@media (max-width: 900px) {
  .global-grid {
    display: flex; overflow-x: auto; scroll-snap-type: x mandatory;
    gap: 15px; padding-bottom: 15px; -webkit-overflow-scrolling: touch;
    scrollbar-width: thin; scrollbar-color: var(--accent) #f1f1f1;
  }
  .global-grid::-webkit-scrollbar { height: 4px; }
  .global-grid::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 4px; }
  .card { min-width: 200px; flex: 0 0 200px; scroll-snap-align: start; }
}
.card {
  background: var(--card-bg); padding: 22px 18px;
  border-radius: 14px; border: 1px solid var(--neutral); transition: box-shadow .3s;
}
.card:hover { box-shadow: 0 4px 20px rgba(139,26,42,.1); }
.card-num { font-family: var(--font-title); font-size: 2.1rem; color: var(--accent); display: block; line-height: 1; }
.card-label { font-weight: 900; font-size: 1rem; margin: 8px 0 6px; display: block; color: var(--text-primary); }
.card-sub { font-size: .88rem; color: var(--text-secondary); line-height: 1.5; }

.bar-group { margin-bottom: 18px; }
.bar-label {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 6px; font-weight: 700; font-size: .88rem; gap: 8px; flex-wrap: wrap;
}
.bar-label span:last-child { white-space: nowrap; flex-shrink: 0; color: var(--accent); font-size: .82rem; }
.bar-bg { height: 10px; background: var(--neutral); border-radius: 5px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--accent); width: 0; transition: width 1.5s ease-out; border-radius: 5px; }

.data-table-wrap {
  overflow-x: auto; margin: 1.5rem 0; -webkit-overflow-scrolling: touch;
  scrollbar-width: thin; scrollbar-color: var(--accent) #f1f1f1;
}
.data-table-wrap::-webkit-scrollbar { height: 4px; }
.data-table-wrap::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 4px; }
.data-table {
  width: 100%; border-collapse: collapse; font-size: .92rem;
  font-family: var(--font-body); min-width: 480px;
}
.data-table thead tr { background: var(--accent); color: #fff; }
.data-table th { padding: 11px 14px; text-align: left; font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; }
.data-table td { padding: 11px 14px; border-bottom: 1px solid var(--neutral); }
.data-table tbody tr:nth-child(even) { background: var(--card-bg); }
.data-table .row-top td { color: var(--accent); font-weight: 700; }
.td-bar { width: 140px; }
.bar-inline { display: flex; align-items: center; gap: 8px; }
.bar-inline .bar-bg { flex: 1; height: 6px; }

.zero-callout {
  display: flex; align-items: center; gap: 22px;
  background: var(--accent); color: #fff;
  border-radius: 12px; padding: 24px 28px; margin: 1.5rem 0;
}
.zero-num { font-family: var(--font-title); font-size: 4rem; color: rgba(255,255,255,.35); line-height: 1; flex-shrink: 0; }
.zero-text { font-size: .95rem; line-height: 1.6; }
.zero-text strong { font-size: 1.1rem; display: block; margin-bottom: 4px; color: #fff; }

.article-footer {
  text-align: center; margin-top: 60px; padding: 40px 20px;
  border-top: 1px solid var(--neutral);
  font-size: .9rem; color: var(--text-secondary); line-height: 2;
}
.article-footer a { color: var(--accent); text-decoration: none; font-weight: 700; }
.article-footer a:hover { text-decoration: underline; }
.footer-row { display: flex; align-items: center; justify-content: center; gap: 6px; flex-wrap: wrap; }
.footer-row .sep { color: var(--neutral); margin: 0 4px; }

.fade-in { opacity: 0; transform: translateY(20px); transition: .6s ease-out; }
.fade-in.visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .chart-box { padding: 20px 16px 16px; }
  .col-chart-wide { padding: 0 12px; }
}
@media (max-width: 600px) {
  .main-title { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }
  .zero-num { font-size: 3rem; }
  .bar-label { font-size: .82rem; }
  .bar-label span:last-child { font-size: .76rem; }
}
@media (max-width: 400px) {
  .zero-callout { flex-direction: column; gap: 12px; text-align: center; }
  .zero-num { font-size: 2.5rem; }
}