:root {
  --ink: #111;
  --muted: #6f6f6b;
  --line: #deded9;
  --surface: #f3f3f0;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: #fff; font-family: Inter, system-ui, sans-serif; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.content-header {
  min-height: 72px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 30px;
  padding: 0 5vw;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.96);
}
.content-logo { display: inline-flex; align-items: center; gap: 9px; }
.content-logo .brand-mark { width: 28px; height: 35px; object-fit: contain; }
.content-logo .brand-wordmark { width: 108px; object-fit: contain; }
.content-nav { display: flex; justify-content: center; gap: 28px; color: #555; font-size: 12px; }
.content-nav a:hover { color: #111; }
.content-header-action { padding: 11px 17px; border-radius: 999px; color: #fff; background: #111; font-size: 12px; font-weight: 600; }

.content-hero {
  position: relative;
  min-height: 430px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  padding: 72px 5vw;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(0,0,0,.78), rgba(0,0,0,.3)),
    url("https://images.unsplash.com/photo-1490481651871-ab68de25d43d?auto=format&fit=crop&w=2000&q=85") center 42% / cover;
}
.content-hero-inner { position: relative; z-index: 1; width: min(1050px, 100%); }
.content-breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; color: rgba(255,255,255,.68); font-size: 11px; }
.content-breadcrumb strong { color: #fff; font-weight: 500; }
.content-kicker { display: block; margin-bottom: 13px; color: rgba(255,255,255,.72); font-family: "Instrument Serif", serif; font-size: 23px; }
.content-hero h1 { max-width: 980px; margin: 0; font-size: clamp(52px, 7vw, 104px); font-weight: 500; line-height: .92; }
.content-hero p { max-width: 680px; margin: 24px 0 0; color: rgba(255,255,255,.78); font-size: 14px; line-height: 1.75; }

.content-layout {
  width: min(1380px, calc(100% - 48px));
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: clamp(50px, 8vw, 130px);
  margin: 0 auto;
  padding: 86px 0 110px;
}
.content-toc { position: sticky; top: 24px; align-self: start; }
.content-toc > span { display: block; margin-bottom: 16px; color: #999; font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.content-toc nav { display: grid; border-top: 1px solid var(--line); }
.content-toc a { padding: 14px 0; border-bottom: 1px solid var(--line); color: #666; font-size: 12px; line-height: 1.45; }
.content-toc a:hover { color: #111; }
.content-contact { margin-top: 26px; padding: 20px; border-radius: 8px; background: var(--surface); }
.content-contact span { color: #888; font-size: 10px; text-transform: uppercase; }
.content-contact strong { display: block; margin-top: 8px; font-size: 20px; }
.content-contact p { margin: 8px 0 14px; color: #777; font-size: 11px; line-height: 1.55; }
.content-contact a { display: inline-block; padding-bottom: 3px; border-bottom: 1px solid #111; font-size: 11px; font-weight: 600; }

.content-article { min-width: 0; }
.content-intro { display: grid; grid-template-columns: minmax(220px, .75fr) minmax(360px, 1.25fr); gap: clamp(40px, 7vw, 100px); padding-bottom: 68px; border-bottom: 1px solid var(--line); }
.content-intro h2 { margin: 0; font-size: clamp(32px, 4vw, 54px); font-weight: 500; line-height: 1.08; }
.content-intro p { margin: 7px 0 0; color: #5f5f5b; font-size: 15px; line-height: 1.85; }
.content-section { scroll-margin-top: 30px; display: grid; grid-template-columns: minmax(190px, .55fr) minmax(380px, 1.45fr); gap: clamp(36px, 7vw, 90px); padding: 56px 0; border-bottom: 1px solid var(--line); }
.content-section-number { color: #aaa; font-family: "Instrument Serif", serif; font-size: 22px; }
.content-section h2 { margin: 6px 0 0; font-size: clamp(24px, 2.6vw, 38px); font-weight: 500; line-height: 1.15; }
.content-section-body { color: #5e5e5a; font-size: 14px; line-height: 1.8; }
.content-section-body p { margin: 0 0 16px; }
.content-section-body ul { display: grid; gap: 11px; margin: 0; padding: 0; list-style: none; }
.content-section-body li { position: relative; padding-left: 20px; }
.content-section-body li::before { content: ""; position: absolute; top: .78em; left: 0; width: 6px; height: 6px; border-radius: 50%; background: #111; }
.content-note { margin-top: 22px; padding: 18px 20px; border-left: 2px solid #111; background: var(--surface); color: #444; }

.content-related { padding: 76px 5vw 92px; background: #111; color: #fff; }
.content-related-head { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 34px; }
.content-related-head span { color: #888; font-family: "Instrument Serif", serif; font-size: 20px; }
.content-related-head h2 { margin: 6px 0 0; font-size: clamp(34px, 4vw, 56px); font-weight: 500; }
.content-related-head a { padding-bottom: 4px; border-bottom: 1px solid rgba(255,255,255,.7); font-size: 12px; }
.content-related-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid rgba(255,255,255,.18); }
.content-related-card { min-height: 155px; padding: 25px 24px; border-right: 1px solid rgba(255,255,255,.18); }
.content-related-card:last-child { border-right: 0; }
.content-related-card small { color: #777; }
.content-related-card h3 { margin: 26px 0 8px; font-size: 18px; font-weight: 500; }
.content-related-card p { margin: 0; color: #999; font-size: 11px; line-height: 1.55; }

@media (max-width: 900px) {
  .content-layout { grid-template-columns: 1fr; gap: 46px; }
  .content-toc { position: static; }
  .content-toc nav { grid-template-columns: repeat(2, 1fr); }
  .content-intro, .content-section { grid-template-columns: 1fr; gap: 26px; }
}

@media (max-width: 600px) {
  .content-header { grid-template-columns: 1fr auto; min-height: 64px; padding: 0 16px; }
  .content-nav { display: none; }
  .content-header-action { padding: 10px 13px; }
  .content-hero { min-height: 390px; padding: 54px 20px; }
  .content-hero h1 { font-size: 52px; }
  .content-layout { width: calc(100% - 32px); padding: 58px 0 76px; }
  .content-toc nav { grid-template-columns: 1fr; }
  .content-intro { padding-bottom: 48px; }
  .content-section { padding: 44px 0; }
  .content-related { padding: 58px 20px 68px; }
  .content-related-head { align-items: flex-start; flex-direction: column; }
  .content-related-grid { grid-template-columns: 1fr; }
  .content-related-card { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.18); }
}