:root {
  --bg: #f7f5f1;
  --ink: #1a1a1a;
  --muted: #5c5c5c;
  --paper: #ffffff;
  --accent: #ff4d4d;
  --accent-2: #2b2bff;
  --line: rgba(0,0,0,0.12);
  --shadow: 0 10px 30px rgba(0,0,0,0.12);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: "Noto Serif SC", "Songti SC", serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.8;
}

body.masking::before {
  content: \"\";
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.25);
  backdrop-filter: blur(2px);
  z-index: 100;
  animation: fadeMask 0.2s ease;
}

@keyframes fadeMask {
  from { opacity: 0; }
  to { opacity: 1; }
}

body.dark {
  --bg: #111013;
  --ink: #f4f4f4;
  --muted: #c5c5c5;
  --paper: #1b1a1e;
  --line: rgba(255,255,255,0.14);
  --shadow: 0 12px 40px rgba(0,0,0,0.6);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.masthead {
  padding: 22px 20px 28px;
  background: linear-gradient(90deg, rgba(255,77,77,0.08), rgba(43,43,255,0.08));
}

.mast-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}

.mast-brand { display: flex; align-items: center; gap: 12px; }
.brand-logo { height: 22px; width: auto; }
.title { font-weight: 700; letter-spacing: 0.5px; }

.mast-nav { display: none; gap: 16px; font-size: 14px; color: var(--muted); }
.mast-nav a.active { text-decoration: underline; text-underline-offset: 6px; }

.mode-switch {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 6px 10px;
  border-radius: 999px;
  cursor: pointer;
}

.nav-burger {
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 8px;
  padding: 6px;
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
}

.nav-burger span { width: 18px; height: 2px; background: var(--ink); }

.mast-nav.open {
  position: absolute;
  top: 58px;
  right: 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 10;
  box-shadow: var(--shadow);
}

.cover-grid {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.cover-text h1 { font-size: 32px; margin: 8px 0 12px; }
.cover-points { display: grid; gap: 8px; font-weight: 600; }

.cover-media img { border: 1px solid var(--line); box-shadow: var(--shadow); }
.decor-row { display: grid; grid-template-columns: 1fr 1.4fr; gap: 10px; margin-top: 10px; }
.decor-row img { border: 1px solid var(--line); }

.magazine { padding: 20px; }
.spread {
  margin: 26px 0;
  padding: 20px;
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  position: relative;
}

.spread-head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.spread-head h2 {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: 0.6px;
  display: inline-block;
  padding: 6px 14px 6px 12px;
  background: linear-gradient(90deg, rgba(255,77,77,0.12), rgba(43,43,255,0.12));
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow);
}

.spread-head h2::after {
  content: "";
  display: block;
  height: 2px;
  width: 90px;
  margin-top: 8px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.card-x h3,
.flow-step h3,
.backup-text h3,
.auth-text h3,
.eco-card h3,
.faq-item h3 {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.3px;
  display: inline-block;
  padding: 4px 10px;
  background: rgba(255,77,77,0.12);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.spread-grid { display: grid; gap: 16px; }
.spread-grid .col img { margin-top: 12px; border: 1px solid var(--line); }

.mislist { padding-left: 18px; color: var(--muted); display: grid; gap: 6px; }

.magazine-three { display: grid; gap: 16px; }

.card-x {
  border: 1px solid var(--line);
  background: var(--paper);
  overflow: hidden;
  position: relative;
}

.card-x img { transition: transform 0.5s ease; }
.card-x h3 { padding: 12px 14px 6px; }
.card-x p { padding: 0 14px 10px; color: var(--muted); }
.card-x::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0%;
  height: 3px;
  background: var(--accent);
  transition: width 0.4s ease;
}
.card-x:hover img { transform: scale(1.05); }
.card-x:hover::after { width: 100%; }

.compare-table { margin-top: 16px; border: 1px solid var(--line); }
.compare-row { display: grid; grid-template-columns: 1.2fr 1fr 1fr 1fr; }
.compare-row span { padding: 10px; border-bottom: 1px solid var(--line); }
.compare-row.head span { font-weight: 700; background: rgba(0,0,0,0.04); }

.flow-wrap { display: grid; gap: 16px; }
.flow-rail { display: grid; gap: 12px; }
.flow-step { border: 1px solid var(--line); padding: 12px; background: rgba(0,0,0,0.02); }
.flow-media { display: grid; gap: 10px; }
.flow-media img { border: 1px solid var(--line); }

.backup-grid { display: grid; gap: 16px; }
.backup-list { padding-left: 18px; color: var(--muted); display: grid; gap: 6px; }
.backup-media { display: grid; gap: 10px; }
.backup-media img { border: 1px solid var(--line); }

.auth-wrap { display: grid; gap: 16px; }
.risk-grid { display: grid; gap: 10px; margin-top: 10px; }
.risk-grid div { border: 1px solid var(--line); padding: 10px; background: rgba(0,0,0,0.03); }
.auth-media { display: grid; gap: 10px; }
.auth-media img { border: 1px solid var(--line); }

.eco-grid { display: grid; gap: 14px; }
.eco-card { border: 1px solid var(--line); padding: 12px; background: rgba(0,0,0,0.02); }
.eco-card ul { padding-left: 18px; color: var(--muted); display: grid; gap: 6px; }
.eco-note { color: var(--muted); margin-top: 8px; }
.eco-media { display: grid; gap: 12px; margin-top: 12px; }
.eco-media img { border: 1px solid var(--line); }

.faq-list { display: grid; gap: 10px; }
.faq-item { border: 1px solid var(--line); padding: 12px; background: rgba(0,0,0,0.02); }
.faq-item h3 { font-size: 16px; cursor: pointer; }
.faq-body { display: none; color: var(--muted); margin-top: 8px; }
.faq-item.open .faq-body { display: block; }

.press-footer {
  margin-top: 24px;
  padding: 20px;
  border-top: 1px solid var(--line);
  background: var(--paper);
}

.footer-grid { display: grid; gap: 12px; }
.footer-grid a { display: block; color: var(--muted); margin-bottom: 6px; }
.footer-bottom { text-align: center; color: var(--muted); margin-top: 12px; }

@media (min-width: 768px) {
  .mast-nav { display: flex; }
  .nav-burger { display: none; }
  .cover-grid { grid-template-columns: 1.1fr 0.9fr; align-items: center; }
  .spread-grid { grid-template-columns: 1.2fr 0.8fr; }
  .magazine-three { grid-template-columns: repeat(3, 1fr); }
  .flow-wrap { grid-template-columns: 1.2fr 0.8fr; }
  .backup-grid { grid-template-columns: 1.2fr 0.8fr; }
  .auth-wrap { grid-template-columns: 1.2fr 0.8fr; }
  .eco-grid { grid-template-columns: repeat(3, 1fr); }
  .eco-media { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
  .magazine { scroll-snap-type: y proximity; }
  .spread { scroll-snap-align: start; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}