:root {
  color-scheme: light;

  --bg: #F7F8FC;
  --bg-card: #FFFFFF;
  --surface: #EEF1F8;
  --text: #121A2E;
  --text-2: #33405C;
  --muted: #5E6B87;
  --teal: #0A8A68;
  --teal-hover: #07704F;
  --violet: #6D3FD6;
  --pink: #D0287A;
  --border: rgba(18, 26, 46, 0.12);
  --topbar-bg: rgba(255, 255, 255, 0.92);
  --btn-text: #FFFFFF;
  --cta-border: rgba(10, 138, 104, 0.3);
  --cta-bg: linear-gradient(135deg, rgba(10, 138, 104, 0.08), rgba(109, 63, 214, 0.06) 50%, rgba(208, 40, 122, 0.06));
  --shadow: 0 1px 3px rgba(18, 26, 46, 0.06), 0 4px 14px rgba(18, 26, 46, 0.04);
  --radius: 16px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0A0E1A;
  --bg-card: #171E35;
  --surface: #1C2440;
  --text: #F0F4FF;
  --text-2: #B4C1DE;
  --muted: #8B9CC0;
  --teal: #2DD4A8;
  --teal-hover: #5AEBC4;
  --violet: #A78BFA;
  --pink: #F472B6;
  --border: rgba(139, 156, 192, 0.15);
  --topbar-bg: rgba(10, 14, 26, 0.92);
  --btn-text: #06231B;
  --cta-border: rgba(45, 212, 168, 0.3);
  --cta-bg: linear-gradient(135deg, rgba(45, 212, 168, 0.12), rgba(167, 139, 250, 0.08) 50%, rgba(244, 114, 182, 0.1));
  --shadow: none;
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-2);
  font: 16px/1.7 'Inter', system-ui, -apple-system, sans-serif;
}

a { color: var(--teal); }
a:hover { color: var(--teal-hover); }

.wrap { max-width: 900px; margin: 0 auto; padding: 0 20px; }

.topbar {
  position: sticky; top: 0; z-index: 10;
  background: var(--topbar-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 1.15rem; }
.brand img { border-radius: 10px; }
.brand b { color: var(--pink); }
.topbar nav { display: flex; align-items: center; gap: 18px; }
.topbar nav a:not(.btn) { color: var(--text-2); text-decoration: none; font-size: 0.92rem; }

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer;
}
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun,
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }

.btn {
  display: inline-block; padding: 11px 20px; border-radius: 999px;
  background: var(--teal); color: var(--btn-text); font-weight: 700; text-decoration: none;
}
.btn:hover { color: var(--btn-text); filter: brightness(1.08); }
.btn-sm { padding: 7px 14px; font-size: 0.88rem; }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { color: var(--text); background: var(--surface); }

.crumbs { margin: 28px 0 8px; font-size: 0.85rem; color: var(--muted); }
.crumbs a { color: var(--muted); }

h1 {
  margin: 0 0 16px; color: var(--text); font-size: clamp(1.9rem, 5vw, 2.7rem); line-height: 1.15; font-weight: 800;
  background: linear-gradient(135deg, var(--teal), var(--violet) 55%, var(--pink));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
h2 { margin: 48px 0 16px; color: var(--text); font-size: 1.5rem; line-height: 1.3; }
h3 { margin: 0 0 10px; color: var(--text); font-size: 1.05rem; }

.lead { font-size: 1.05rem; }
.jump { font-size: 0.9rem; color: var(--muted); }

.paper {
  margin: 0 0 18px; padding: 20px 22px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.paper h3 { color: var(--teal); }
.paper ol { margin: 0; padding-left: 22px; color: var(--text); }
.paper li { margin: 0 0 10px; }
.paper li::marker { color: var(--muted); font-weight: 600; }

.cta {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px;
  margin: 40px 0; padding: 24px;
  border-radius: var(--radius); border: 1px solid var(--cta-border);
  background: var(--cta-bg);
}
.cta strong { color: var(--text); font-size: 1.1rem; }
.cta p { margin: 6px 0 0; }
.stores { display: flex; gap: 10px; flex-wrap: wrap; }

.topics { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.topic-group {
  padding: 16px 18px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.topic-group h3 { font-size: 0.95rem; color: var(--violet); }
.topic-group ul { margin: 0; padding-left: 18px; font-size: 0.93rem; }

.older-list {
  list-style: none; margin: 0 0 20px; padding: 0;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
}
.older-list li { display: flex; justify-content: space-between; gap: 12px; padding: 11px 18px; border-top: 1px solid var(--border); }
.older-list li:first-child { border-top: 0; }
.muted { color: var(--muted); font-size: 0.9rem; white-space: nowrap; }

.others ul { columns: 2 260px; padding-left: 18px; font-size: 0.95rem; }

.foot { margin-top: 60px; padding: 28px 0; border-top: 1px solid var(--border); font-size: 0.85rem; color: var(--muted); }
.foot a { color: var(--muted); }

@media print {
  .topbar, .cta, .others, .foot, .jump { display: none; }
  body { background: #fff; color: #000; }
  .paper, .topic-group { box-shadow: none; break-inside: avoid; }
}

@media (max-width: 560px) {
  .topbar nav a:not(.btn) { display: none; }
  .older-list li { flex-direction: column; gap: 0; }
}