:root {
  --mist: #E7EEF4;
  --steel: #3D5A80;
  --ice: #98C1D9;
  --ink: #293241;
  --paper: #F7FAFC;
  --muted: #5C6B7A;
}

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

body {
  font-family: "Segoe UI", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--mist);
  color: var(--ink);
  line-height: 1.72;
}

a { color: var(--steel); }

.wrap { width: min(1140px, calc(100% - 36px)); margin: 0 auto; }

.header {
  background: #fff;
  border-bottom: 1px solid #C9D6E2;
}

.header-in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}

.brand { font-weight: 700; color: var(--steel); }

.nav { display: flex; gap: 16px; font-size: 14px; }
.nav a { text-decoration: none; color: var(--ink); }
.nav a:hover { color: var(--steel); }

.btn {
  background: var(--steel);
  color: #fff;
  text-decoration: none;
  padding: 11px 18px;
  border-radius: 8px;
  font-weight: 700;
}

.hero { padding: 48px 0 20px; }

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: center;
}

h1 { font-size: clamp(28px, 3.6vw, 40px); line-height: 1.28; margin-bottom: 14px; }
.hero p { color: var(--muted); margin-bottom: 12px; }

.window {
  background: #fff;
  border: 1px solid #B7C7D6;
  border-radius: 12px;
  box-shadow: 0 16px 40px rgba(41, 50, 65, 0.12);
  overflow: hidden;
}

.chrome {
  background: #D8E3EC;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
}

.dot { width: 10px; height: 10px; border-radius: 50%; background: #98C1D9; }
.dot:nth-child(1) { background: #EE6C4D; }
.dot:nth-child(2) { background: #E0C14A; }
.dot:nth-child(3) { background: #6BBF6B; }

.url {
  flex: 1;
  background: #fff;
  border-radius: 6px;
  font-size: 12px;
  color: var(--muted);
  padding: 4px 8px;
}

.window-body { padding: 16px; min-height: 160px; }
.fake-row { height: 10px; background: #E7EEF4; border-radius: 6px; margin-bottom: 8px; }
.fake-row.w2 { width: 72%; }
.fake-row.w3 { width: 54%; background: #98C1D9; }

section { padding: 46px 0; }
h2 { font-size: clamp(22px, 3vw, 30px); margin-bottom: 12px; color: var(--steel); }
.lead { color: var(--muted); margin-bottom: 18px; }

.dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.pane-title {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--steel);
  margin-bottom: 8px;
  font-weight: 700;
}

.cols-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.tile svg { width: 28px; height: 28px; margin-bottom: 8px; color: #3d5a80; display: block; }
.tile {
  background: #fff;
  border-radius: 12px;
  padding: 18px;
  border: 1px solid #C9D6E2;
}

.tile h3 { margin-bottom: 8px; font-size: 18px; }

.pair {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 20px;
}

.callout {
  background: var(--steel);
  color: #fff;
  border-radius: 12px;
  padding: 20px;
}

.callout h3 { margin-bottom: 8px; }

.steps-h {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.steps-h article {
  background: #fff;
  border-radius: 10px;
  padding: 14px;
  position: relative;
}

.steps-h article::after {
  content: "";
  position: absolute;
  right: -8px;
  top: 28px;
  width: 8px;
  height: 2px;
  background: var(--ice);
}

.steps-h article:last-child::after { display: none; }

.num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ice);
  color: var(--ink);
  display: grid;
  place-items: center;
  font-weight: 800;
  margin-bottom: 8px;
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.chips span {
  background: #fff;
  border: 1px solid var(--ice);
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 13px;
}

.warn {
  background: #fff;
  border-left: 5px solid var(--steel);
  padding: 14px 16px;
  margin-top: 14px;
}

details {
  background: #fff;
  border: 1px solid #C9D6E2;
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 8px;
}

summary { cursor: pointer; font-weight: 700; }
details p { margin-top: 8px; color: var(--muted); }

.foot {
  background: var(--ink);
  color: #C9D6E2;
  padding: 32px 0;
  font-size: 14px;
}
.foot p { margin-bottom: 7px; }
.foot strong { color: var(--ice); }

@media (max-width: 900px) {
  .hero-grid, .dual, .cols-3, .pair, .steps-h { grid-template-columns: 1fr; }
  .steps-h article::after { display: none; }
  .nav { display: none; }
}

.news-desk { padding: 36px 0; }
.news-pane { list-style: none; display: grid; gap: 12px; }
.news-pane li { background: #fff; border: 1px solid #98c1d9; padding: 16px 18px; display: grid; grid-template-columns: 1fr auto; gap: 6px 16px; }
.news-pane h3 { grid-column: 1; margin: 0; }
.news-pane time { grid-column: 2; color: #3d5a80; font-size: 13px; }
.news-pane p { grid-column: 1 / -1; margin: 0; }
@media (max-width: 700px) { .news-pane li { grid-template-columns: 1fr; } }