:root {
  --ink: #17151d;
  --muted: #716d79;
  --line: #e7e1ed;
  --soft: #f7f4fa;
  --purple: #6b48d7;
  --green: #4bbf9f;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}
a { color: inherit; text-decoration: none; }
.portal-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .95);
}
.portal-header-inner,
.portal-main,
.footer-inner {
  width: min(1240px, calc(100% - 48px));
  margin: 0 auto;
}
.portal-header-inner {
  display: flex;
  min-height: 78px;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; gap: 12px; align-items: center; }
.brand img { border-radius: 10px; object-fit: contain; }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 17px; }
.brand small { margin-top: 3px; color: var(--muted); font-size: 12px; }
nav { display: flex; gap: 28px; color: var(--muted); font-size: 14px; }
nav a:hover, nav a.is-active { color: var(--purple); }
.portal-main { padding: 64px 0 100px; }
.portal-grid {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr) 270px;
  gap: 54px;
  align-items: start;
}
.eyebrow, .story-type {
  color: var(--purple);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.4px;
}
.portal-rail h1 {
  margin: 18px 0 20px;
  font-size: 33px;
  line-height: 1.2;
}
.portal-rail p, .portal-aside p, .lead-story p, .story-row p {
  color: var(--muted);
  line-height: 1.85;
}
.rail-links { display: grid; gap: 14px; margin-top: 34px; font-size: 14px; }
.rail-links a::before { display: inline-block; width: 18px; color: var(--green); content: "↗"; }
.lead-story {
  padding: 34px;
  background: linear-gradient(135deg, #f5f0ff, #effbf7);
}
.lead-story h2 { max-width: 650px; margin: 16px 0; font-size: 31px; line-height: 1.35; }
.lead-story p { max-width: 670px; margin: 0; }
.story-link {
  display: inline-flex;
  gap: 12px;
  margin-top: 26px;
  color: var(--purple);
  font-weight: 700;
}
.story-list { border-top: 1px solid var(--line); }
.story-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 18px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}
.story-number { color: var(--green); font-size: 18px; font-weight: 700; }
.story-row h2 { margin: 8px 0; font-size: 20px; }
.story-row p { margin: 0; font-size: 14px; }
.portal-aside section { padding-bottom: 30px; border-bottom: 1px solid var(--line); }
.portal-aside h2 { margin: 0 0 20px; font-size: 19px; }
dl { margin: 0; }
dt { margin-top: 18px; font-size: 14px; font-weight: 700; }
dd { margin: 6px 0 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.trust-panel { padding-top: 30px; }
.portal-footer { border-top: 1px solid var(--line); background: var(--soft); }
.footer-inner {
  display: flex;
  gap: 22px;
  min-height: 88px;
  align-items: center;
  color: var(--muted);
  font-size: 12px;
}
.footer-inner strong { color: var(--ink); font-size: 16px; }
.footer-inner a:hover { color: var(--purple); }
@media (max-width: 900px) {
  .portal-grid { grid-template-columns: 1fr; gap: 36px; }
  .portal-rail { max-width: 620px; }
  .portal-aside { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
}
@media (max-width: 620px) {
  .portal-header-inner, .portal-main, .footer-inner { width: min(100% - 32px, 1240px); }
  .portal-header-inner { align-items: flex-start; flex-direction: column; gap: 16px; padding: 18px 0; }
  nav { gap: 18px; flex-wrap: wrap; }
  .portal-main { padding: 40px 0 64px; }
  .portal-rail h1 { font-size: 29px; }
  .lead-story { padding: 24px; }
  .lead-story h2 { font-size: 24px; }
  .portal-aside { display: block; }
  .portal-aside section + section { margin-top: 28px; }
  .footer-inner { flex-wrap: wrap; padding: 24px 0; }
}