:root {
  color-scheme: light;
  --paper: #f8f7f3;
  --paper-light: #fcfbf8;
  --ink: #393a36;
  --muted: #706d65;
  --line: rgba(57, 58, 54, 0.18);
  --red: #ce3421;
  --font: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font); }
a { color: inherit; text-underline-offset: 4px; }
a:focus-visible { outline: 2px solid var(--red); outline-offset: 4px; }
.skip-link { position: absolute; top: -80px; left: 20px; z-index: 10; padding: 10px 14px; background: var(--paper-light); }
.skip-link:focus { top: 12px; }

.reading-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 86px;
  padding: 16px clamp(20px, 4.4vw, 72px);
  border-bottom: 1px solid var(--line);
  background: var(--paper-light);
}
.reading-brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; flex-shrink: 0; }
.reading-brand img { width: 36px; height: 36px; }
.reading-brand strong { display: block; font-size: 19px; line-height: 1.1; }
.reading-brand small { display: block; margin-top: 4px; color: var(--muted); font-size: 11px; letter-spacing: .12em; }
.reading-site-nav { display: flex; flex-wrap: wrap; gap: clamp(16px, 2.3vw, 34px); align-items: center; }
.reading-site-nav a { font-size: 15px; font-weight: 700; text-decoration: none; }
.reading-site-nav a:hover { color: var(--red); }

.reading-wrap { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.reading-breadcrumb { display: flex; gap: 8px; flex-wrap: wrap; padding-top: 28px; color: var(--muted); font-size: 13px; }
.reading-breadcrumb a { text-decoration: none; }
.reading-breadcrumb a:hover { color: var(--red); }
.reading-hero { padding: clamp(52px, 8vw, 108px) 0 60px; border-bottom: 1px solid var(--line); }
.reading-kicker { margin: 0 0 20px; color: var(--red); font-size: 13px; font-weight: 700; letter-spacing: .18em; }
.reading-hero h1 { max-width: 18em; margin: 0; font-size: clamp(34px, 4.7vw, 62px); line-height: 1.22; letter-spacing: -.018em; }
.reading-deck { max-width: 43em; margin: 24px 0 0; color: var(--muted); font-size: clamp(17px, 1.8vw, 21px); line-height: 1.75; }
.reading-meta { margin: 24px 0 0; color: var(--muted); font-size: 13px; line-height: 1.6; }
.reading-meta time { font-variant-numeric: tabular-nums; }

.reading-grid { display: grid; grid-template-columns: minmax(0, 750px) minmax(180px, 1fr); gap: clamp(48px, 7vw, 110px); padding-block: 58px 110px; }
.reading-article { min-width: 0; }
.reading-article h2 { margin: 54px 0 14px; font-size: clamp(23px, 2.4vw, 30px); line-height: 1.35; }
.reading-article h2:first-child { margin-top: 0; }
.reading-article h3 { margin: 34px 0 10px; font-size: 19px; line-height: 1.5; }
.reading-article p, .reading-article li { font-size: 17px; line-height: 1.9; }
.reading-article p { margin: 0 0 19px; }
.reading-article ul, .reading-article ol { margin: 0 0 24px; padding-left: 1.45em; }
.reading-article li + li { margin-top: 11px; }
.reading-article strong { color: #25261f; }
.reading-answer { padding: 22px 26px; border-left: 3px solid var(--red); background: var(--paper-light); }
.reading-answer p:last-child { margin-bottom: 0; }
.reading-note { margin-top: 40px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); }
.reading-note p, .reading-note li { font-size: 14px; line-height: 1.75; }
.reading-next { display: flex; flex-wrap: wrap; gap: 12px 32px; margin-top: 54px; padding-top: 24px; border-top: 1px solid var(--line); font-weight: 700; }
.reading-next a { color: var(--red); }

.reading-aside { align-self: start; position: sticky; top: 24px; border-top: 2px solid var(--ink); padding-top: 20px; }
.reading-aside h2 { margin: 0 0 20px; font-size: 15px; }
.reading-aside ul { margin: 0; padding: 0; list-style: none; }
.reading-aside li { border-top: 1px solid var(--line); }
.reading-aside li:last-child { border-bottom: 1px solid var(--line); }
.reading-aside a { display: block; padding: 14px 0; color: var(--muted); font-size: 14px; line-height: 1.6; text-decoration: none; }
.reading-aside a:hover, .reading-aside a[aria-current="page"] { color: var(--red); }

.reading-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 30px; padding: 66px 0 110px; }
.reading-entry { border-top: 2px solid var(--ink); padding-top: 20px; }
.reading-entry p:first-child { margin: 0 0 18px; color: var(--red); font-size: 13px; font-weight: 700; }
.reading-entry h2 { margin: 0 0 18px; font-size: clamp(23px, 2.3vw, 29px); line-height: 1.4; }
.reading-entry h2 a { text-decoration: none; }
.reading-entry h2 a:hover { color: var(--red); }
.reading-entry p { margin: 0 0 20px; color: var(--muted); font-size: 15px; line-height: 1.8; }
.reading-entry > a { color: var(--red); font-size: 15px; font-weight: 700; }

.reading-footer { border-top: 1px solid var(--line); padding: 30px 0 44px; color: var(--muted); font-size: 13px; }
.reading-footer .reading-wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px 32px; }
.reading-footer p { margin: 0; }
.reading-footer nav { display: flex; gap: 20px; flex-wrap: wrap; }

@media (max-width: 800px) {
  .reading-grid { grid-template-columns: 1fr; gap: 48px; padding-bottom: 80px; }
  .reading-aside { position: static; }
  .reading-list { grid-template-columns: 1fr; gap: 42px; }
}
@media (max-width: 600px) {
  .reading-header { align-items: flex-start; flex-direction: column; gap: 16px; min-height: 112px; }
  .reading-site-nav { width: 100%; justify-content: space-between; }
  .reading-site-nav a { font-size: 14px; }
  .reading-wrap { width: min(100% - 40px, 1180px); }
  .reading-hero { padding: 46px 0 42px; }
  .reading-grid { padding-top: 38px; }
  .reading-article p, .reading-article li { font-size: 16px; }
  .reading-answer { padding: 20px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }