:root {
  color-scheme: dark;
  --bg: #151a17;
  --panel: #1d231e;
  --line: #353e36;
  --text: #f0f1e8;
  --muted: #a1aca2;
  --accent: #d7edac;
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  font-synthesis: none;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 32px; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
a, img { -webkit-tap-highlight-color: transparent; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 6px; border-radius: 2px; }
::selection { color: var(--bg); background: var(--accent); }
.shell { width: min(1200px, calc(100% - 96px)); margin-inline: auto; }
.skip-link { position: fixed; top: 12px; left: 12px; z-index: 10; padding: 12px 18px; color: var(--bg); background: var(--accent); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
.site-header { height: 96px; display: flex; align-items: center; gap: 48px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 13px; font-size: 17px; font-weight: 700; letter-spacing: 1.1px; white-space: nowrap; }
.brand-mark { width: 29px; height: 31px; color: var(--accent); flex-shrink: 0; }
.brand-light { font-weight: 400; color: #bac4b9; }
.header-nav { display: flex; align-self: stretch; align-items: stretch; gap: 30px; margin-left: auto; }
.header-nav a { display: flex; align-items: center; gap: 8px; position: relative; font-size: 14px; color: var(--muted); }
.header-nav a:hover, .header-nav .active { color: var(--text); }
.header-nav .active::after { position: absolute; content: ""; height: 2px; background: var(--accent); bottom: -1px; left: 0; right: 0; }
.header-nav a span { font-size: 10px; color: var(--accent); margin-top: -10px; }
.engine-label { display: flex; align-items: center; gap: 8px; color: #c2cdbf; font: 11px/1.4 Consolas, monospace; letter-spacing: 1px; border: 1px solid var(--line); padding: 7px 10px; border-radius: 3px; }
.engine-label i, .status-dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; flex-shrink: 0; }
.hero { display: grid; grid-template-columns: 1.5fr 1fr; gap: 60px; padding: 56px 0 54px; align-items: end; }
.eyebrow { margin: 0 0 20px; color: var(--muted); font: 11px/1.6 Consolas, monospace; letter-spacing: 2px; }
.hero .eyebrow span { color: var(--accent); font-size: 17px; margin-right: 8px; }
h1 { margin: 0; font-size: clamp(38px, 4.3vw, 60px); font-weight: 600; letter-spacing: -1.5px; line-height: 1.32; }
h1 em { color: var(--accent); font-style: normal; font-weight: 400; letter-spacing: -2.5px; }
.hero-summary { max-width: 345px; justify-self: end; padding-bottom: 4px; }
.hero-summary > p { font-size: 14px; line-height: 1.9; color: var(--muted); margin: 0 0 25px; }
.archive-stats { display: flex; gap: 45px; margin: 0; }
.archive-stats > div { display: flex; flex-direction: column-reverse; }
.archive-stats dt { color: var(--muted); font-size: 11px; letter-spacing: 1px; }
.archive-stats dd { font: 36px/1.2 "Segoe UI", sans-serif; font-weight: 300; margin: 0 0 4px; letter-spacing: -1px; }
.archive-stats dd span { font-size: 11px; color: var(--muted); margin-left: 8px; }
.section-heading { border-top: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 20px; padding: 22px 0; }
.section-heading h2 { font-size: 14px; font-weight: 500; margin: 0; display: flex; align-items: center; gap: 10px; letter-spacing: .5px; }
.small-square { width: 6px; height: 6px; background: var(--accent); }
.section-heading > p { color: var(--muted); font: 10px/1.5 Consolas, monospace; letter-spacing: 1px; margin: 0; }
.section-heading > p span { color: #58665b; padding: 0 10px; }
.report-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; }
.report-card { overflow: hidden; background: var(--panel); border: 1px solid var(--line); border-radius: 5px; transition: border-color .2s ease; }
.report-card:hover { border-color: #687b60; }
.report-cover { display: block; position: relative; overflow: hidden; aspect-ratio: 16/9; background: #242d28; }
.report-cover img { width: 100%; height: 100%; display: block; object-fit: cover; transition: transform .5s ease; }
.report-cover:hover img { transform: scale(1.035); }
.cover-label { position: absolute; top: 18px; left: 18px; color: #f3f4ee; background: #121a17e8; padding: 7px 10px; border: 1px solid #ffffff24; border-radius: 2px; font: 10px/1.4 Consolas, monospace; letter-spacing: 1px; }
.cover-label span { padding: 0 8px; color: #9daf9b; }
.cover-arrow { position: absolute; bottom: 18px; right: 18px; display: grid; place-items: center; width: 34px; height: 34px; color: var(--bg); background: var(--accent); border-radius: 50%; font-size: 20px; }
.report-content { padding: 24px 26px 0; }
.report-category { display: flex; align-items: center; justify-content: space-between; gap: 10px; font-size: 11px; letter-spacing: .5px; color: var(--accent); margin: 0 0 10px; }
.report-category > span { color: var(--muted); font-size: 11px; letter-spacing: 0; }
.report-content h3 { margin: 0 0 12px; font-size: 30px; line-height: 1.35; font-weight: 500; }
.report-content h3 span { font-size: 22px; font-weight: 400; color: #d8dfd4; }
.report-content h3 a:hover { color: var(--accent); }
.report-description { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; min-height: 50px; }
.topic-tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 20px 0 24px; }
.topic-tags li { color: #bbc6b7; border: 1px solid #3b453b; border-radius: 3px; font-size: 10px; padding: 3px 8px; }
.card-actions { display: flex; justify-content: space-between; align-items: center; gap: 12px; border-top: 1px solid var(--line); min-height: 66px; }
.read-link { display: inline-flex; align-items: center; gap: 24px; font-size: 13px; color: var(--accent); padding: 12px 0; }
.read-link span { font-size: 21px; transition: transform .2s ease; }
.read-link:hover span { transform: translate(2px, -2px); }
.chapter-link { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 11px; padding: 12px 0; }
.chapter-link:hover { color: var(--text); }
.reading-guide { display: grid; grid-template-columns: 1fr 3fr; gap: 42px; border-top: 1px solid var(--line); margin-top: 60px; padding: 36px 0; }
.guide-intro .eyebrow { color: var(--accent); font-size: 10px; margin-bottom: 13px; letter-spacing: 1.5px; }
.guide-intro h2 { font-size: 22px; line-height: 1.6; margin: 0; font-weight: 400; }
.guide-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; list-style: none; margin: 0; padding: 0; }
.step-number { font: 11px/1.6 Consolas, monospace; color: #8ea285; }
.guide-steps h3 { margin: 14px 0 8px; font-size: 13px; font-weight: 500; }
.guide-steps p { color: var(--muted); font-size: 12px; line-height: 1.9; margin: 0; }
.offline-note { display: flex; align-items: center; gap: 10px; border: 1px solid var(--line); border-radius: 3px; padding: 15px 18px; }
.offline-note p { color: var(--muted); font-size: 11px; margin: 0; }
.note-mark { margin-left: auto; color: #a6b89d; font: 10px/1.6 Consolas, monospace; letter-spacing: 1px; }
.site-footer { display: flex; justify-content: space-between; gap: 20px; color: #96a292; font-size: 10px; letter-spacing: .6px; margin-top: 40px; padding-bottom: 28px; }
.footer-divider { color: #60735d; padding: 0 8px; }
@media (min-width: 1600px) { .hero { padding-block: 68px; } }
@media (max-width: 1100px) {
  .shell { width: calc(100% - 64px); }
  .site-header { gap: 30px; }
  .hero { gap: 32px; grid-template-columns: 1.4fr 1fr; }
  .report-content { padding-inline: 22px; }
  .reading-guide { grid-template-columns: 1fr; gap: 24px; }
  .guide-intro { display: flex; align-items: baseline; gap: 28px; }
  .guide-intro h2 { font-size: 19px; }
  .guide-intro br { display: none; }
}
@media (max-width: 760px) {
  .shell { width: calc(100% - 40px); }
  .site-header { height: 80px; gap: 20px; }
  .brand { font-size: 14px; gap: 10px; }
  .brand-mark { width: 24px; height: 27px; }
  .engine-label { display: none; }
  .header-nav { gap: 18px; }
  .header-nav a { font-size: 12px; }
  .hero { grid-template-columns: 1fr; gap: 25px; padding: 38px 0; }
  h1 { font-size: clamp(36px, 6vw, 48px); }
  .hero-summary { display: flex; gap: 28px; max-width: none; justify-self: stretch; align-items: center; justify-content: space-between; padding: 0; }
  .hero-summary > p { font-size: 12px; margin: 0; max-width: 300px; }
  .archive-stats { gap: 24px; flex-shrink: 0; }
  .archive-stats dd { font-size: 28px; }
  .archive-stats dt { font-size: 10px; }
  .report-grid { grid-template-columns: 1fr; gap: 24px; }
  .report-description { min-height: 0; }
  .section-heading > p { font-size: 9px; letter-spacing: 0; }
  .section-heading > p span { padding: 0 5px; }
  .reading-guide { margin-top: 36px; }
  .guide-steps { gap: 20px; }
  .note-mark { display: none; }
  .site-footer { letter-spacing: 0; }
}
@media (max-width: 480px) {
  .brand-light { display: none; }
  .header-nav { gap: 20px; }
  .hero-summary { align-items: flex-start; flex-direction: column; gap: 20px; }
  .hero-summary > p { max-width: 100%; }
  .archive-stats { gap: 34px; }
  .archive-stats > div { flex-direction: row-reverse; align-items: baseline; gap: 8px; }
  .archive-stats dd span { display: none; }
  .report-content { padding-inline: 20px; }
  .report-content h3 { font-size: 28px; }
  .report-content h3 span { font-size: 20px; }
  .report-category > span { font-size: 10px; }
  .cover-label { top: 12px; left: 12px; }
  .guide-intro { flex-direction: column; gap: 0; }
  .guide-steps { grid-template-columns: 1fr; gap: 24px; }
  .guide-steps li { position: relative; padding-left: 43px; }
  .step-number { position: absolute; top: 2px; left: 0; }
  .guide-steps h3 { margin-top: 0; }
  .site-footer { flex-direction: column; gap: 8px; margin-top: 30px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}