:root {
  --slate: #1E293B;
  --sky: #38BDF8;
  --snow: #F8FAFC;
  --ink: #0F172A;
  --mute: #94A3B8;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    linear-gradient(180deg, #0F172A 0 48px, transparent 48px),
    repeating-linear-gradient(90deg, #1E293B 0 2px, #162032 2px 48px);
  color: var(--ink);
  line-height: 1.65;
}
a { color: inherit; }
.os {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: 100vh;
}
.sidebar {
  background: var(--slate);
  color: var(--snow);
  padding: 28px 18px;
  position: sticky;
  top: 0;
  height: 100vh;
}
.side-brand {
  font-weight: 700;
  color: var(--sky);
  margin-bottom: 22px;
  letter-spacing: 0.03em;
}
.sidebar nav { display: flex; flex-direction: column; gap: 8px; }
.sidebar nav a {
  text-decoration: none;
  color: #E2E8F0;
  padding: 10px 12px;
  border-left: 3px solid transparent;
  background: rgba(15, 23, 42, 0.35);
}
.sidebar nav a:hover { border-left-color: var(--sky); color: var(--sky); }
.side-note { font-size: 0.8rem; color: var(--mute); margin-top: 28px; }
.desk { padding: 28px 24px 40px; display: grid; gap: 18px; }
.window {
  background: var(--snow);
  border: 1px solid #CBD5E1;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.18);
}
.titlebar {
  background: linear-gradient(180deg, #334155, #1E293B);
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  font-size: 0.82rem;
}
.titlebar.sub { background: #0F172A; }
.dots {
  width: 42px;
  height: 10px;
  background:
    radial-gradient(circle at 5px 5px, #F87171 4px, transparent 5px),
    radial-gradient(circle at 18px 5px, #FBBF24 4px, transparent 5px),
    radial-gradient(circle at 31px 5px, #34D399 4px, transparent 5px);
}
.win-body { padding: 20px 22px 24px; }
h1 { font-size: 1.85rem; margin: 0 0 12px; color: var(--ink); }
h2 { font-size: 1.35rem; margin: 0 0 10px; color: var(--slate); }
h3 { font-size: 1rem; margin: 0 0 8px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 22px;
  align-items: start;
}
.cta {
  display: inline-block;
  margin-top: 8px;
  background: var(--sky);
  color: #0F172A;
  text-decoration: none;
  font-weight: 700;
  padding: 10px 18px;
  border: 2px solid #0F172A;
}
.mock {
  background: #0F172A;
  color: #E2E8F0;
  padding: 12px;
  display: grid;
  gap: 8px;
}
.mock-row {
  display: flex;
  justify-content: space-between;
  background: #1E293B;
  padding: 10px 12px;
  border-left: 3px solid var(--sky);
  font-size: 0.9rem;
}
.mock-row.dim { opacity: 0.75; border-left-color: var(--mute); }
.icon-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 12px;
}
.icon-grid figure {
  margin: 0;
  background: #F1F5F9;
  padding: 14px 12px;
  text-align: center;
  border: 1px solid #E2E8F0;
}
.icon-grid svg { width: 36px; height: 36px; color: #0284C7; }
.icon-grid figcaption { font-weight: 700; margin: 6px 0; font-size: 0.9rem; }
.icon-grid p { margin: 0; font-size: 0.86rem; color: #334155; text-align: left; }
.list-pane { border: 1px solid #CBD5E1; }
.lp-row { display: grid; grid-template-columns: 88px 1fr; gap: 10px; padding: 12px; border-bottom: 1px solid #E2E8F0; }
.lp-row span { font-weight: 700; color: #0284C7; }
.lp-row p { margin: 0; }
.explorer { border: 1px solid #94A3B8; }
.ex-row {
  display: grid;
  grid-template-columns: 72px 140px 1fr;
  gap: 10px;
  padding: 10px 12px;
  border-bottom: 1px solid #E2E8F0;
  font-size: 0.92rem;
}
.ex-row span:first-child { font-weight: 700; }
.ex-row p { margin: 0; }
.wizard {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 0;
  margin: 16px 0 0;
  border: 1px solid #94A3B8;
}
.wizard li {
  padding: 14px 12px;
  background: #F1F5F9;
  border-right: 1px solid #CBD5E1;
  position: relative;
}
.wizard li.on { background: #E0F2FE; }
.wizard i {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  background: var(--slate);
  color: #fff;
  font-style: normal;
  font-size: 0.8rem;
  margin-right: 4px;
}
.wizard b { display: block; margin: 8px 0 4px; }
.wizard p { margin: 0; font-size: 0.88rem; }
.two-panes, .two-windows { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.two-panes article { background: #F1F5F9; padding: 14px; border: 1px solid #CBD5E1; }
.mini-win { border: 1px solid #94A3B8; }
.mini-win .pad { padding: 14px; }
.faq-panes { display: grid; gap: 10px; }
.faq-panes article { border: 1px solid #CBD5E1; padding: 0 0 12px; background: #fff; }
.faq-panes h3, .faq-panes p { padding: 0 14px; }
.faq-panes p { margin: 0; }
.foot { margin-top: 4px; }
.foot p { margin: 0 0 8px; font-size: 0.88rem; color: #334155; }
@media (max-width: 960px) {
  .os { grid-template-columns: 1fr; }
  .sidebar { height: auto; position: relative; }
  .sidebar nav { flex-direction: row; flex-wrap: wrap; }
  .hero-grid, .icon-grid, .wizard, .two-panes, .two-windows, .ex-row, .lp-row { grid-template-columns: 1fr; }
}

#news .news-list { list-style: none; }
#news .news-list li { background: #f8fafc; border: 1px solid #cbd5e1; padding: 12px 14px; margin-bottom: 8px; }
#news time { color: #38bdf8; font-size: 12px; }
#news .news-list h3 { color: #0f172a; font-size: 15px; margin: 4px 0 6px; }