:root {
  color-scheme: light;
  --paper: #f7f3ea;
  --paper-soft: #fffaf1;
  --ink: #171614;
  --muted: #6d685f;
  --line: #d8cebd;
  --line-strong: #b8aa96;
  --teal: #176a68;
  --rust: #a7472d;
  --olive: #667447;
  --brass: #b98336;
  --blue: #263d59;
  --shadow: 0 18px 50px rgba(31, 25, 17, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    ui-sans-serif,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0;
  overflow-x: clip;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 40px;
  color: #fffaf1;
  background: rgba(23, 22, 20, 0.72);
  border-bottom: 1px solid rgba(255, 250, 241, 0.16);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  min-width: 150px;
  font-weight: 700;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  min-width: 58px;
  height: 32px;
  padding: 0 8px;
  border: 1px solid rgba(255, 250, 241, 0.45);
  border-radius: 6px;
  font-size: 0.82rem;
}

.brand-word {
  color: rgba(255, 250, 241, 0.76);
  font-size: 0.95rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.92rem;
}

.site-nav a {
  color: rgba(255, 250, 241, 0.78);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: #fffaf1;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  color: #fffaf1;
  background: #171614;
}

.hero-image,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(11, 10, 8, 0.84), rgba(11, 10, 8, 0.48) 42%, rgba(11, 10, 8, 0.08) 72%),
    linear-gradient(0deg, rgba(11, 10, 8, 0.62), rgba(11, 10, 8, 0.08) 52%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(1180px, calc(100% - 80px));
  margin: 0 auto;
  padding: 160px 0 56px;
}

.kicker,
.eyebrow {
  margin: 0 0 14px;
  color: var(--brass);
  font-family:
    ui-monospace,
    SFMono-Regular,
    Menlo,
    Monaco,
    Consolas,
    "Liberation Mono",
    monospace;
  font-size: 0.78rem;
  line-height: 1.4;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 860px;
  margin: 0;
  font-family:
    Georgia,
    "Times New Roman",
    "Songti SC",
    "SimSun",
    serif;
  font-size: 4.8rem;
  line-height: 1.08;
  font-weight: 600;
  letter-spacing: 0;
}

.hero h1 span {
  display: inline;
}

.hero-copy {
  max-width: 690px;
  margin: 28px 0 0;
  color: rgba(255, 250, 241, 0.82);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 6px;
  border: 1px solid rgba(255, 250, 241, 0.34);
  font-weight: 700;
}

.button.primary {
  background: #fffaf1;
  color: var(--ink);
  border-color: #fffaf1;
}

.button.ghost {
  color: #fffaf1;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.signal-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: 820px;
  margin: 58px 0 0;
  padding: 0;
  background: rgba(255, 250, 241, 0.22);
  border: 1px solid rgba(255, 250, 241, 0.22);
  border-radius: 8px;
  overflow: hidden;
}

.signal-row div {
  padding: 18px;
  background: rgba(23, 22, 20, 0.52);
}

.signal-row dt {
  color: rgba(255, 250, 241, 0.54);
  font-family:
    ui-monospace,
    SFMono-Regular,
    Menlo,
    Monaco,
    Consolas,
    "Liberation Mono",
    monospace;
  font-size: 0.72rem;
  text-transform: uppercase;
}

.signal-row dd {
  margin: 4px 0 0;
  font-weight: 700;
}

.section,
.section-band {
  padding: 88px 40px;
}

.section {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.section-band {
  width: 100%;
  background: var(--paper-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.intro-grid {
  width: min(1180px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 0.9fr 1fr 1fr;
  gap: 44px;
  align-items: start;
}

.intro h2,
.section h2 {
  margin: 0;
  font-family:
    Georgia,
    "Times New Roman",
    "Songti SC",
    "SimSun",
    serif;
  font-size: 2.3rem;
  line-height: 1.2;
  letter-spacing: 0;
}

.intro p,
.section-heading p,
.split p,
.about-copy p {
  margin: 0;
  color: var(--muted);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(240px, 0.75fr) minmax(280px, 1fr);
  gap: 36px;
  align-items: end;
  margin-bottom: 34px;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.filter {
  min-height: 38px;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
}

.filter.active,
.filter:hover,
.filter:focus-visible {
  color: var(--ink);
  background: #fffaf1;
  border-color: var(--line-strong);
}

.essay-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.essay-card {
  display: flex;
  flex-direction: column;
  min-height: 280px;
  padding: 22px;
  background: #fffaf1;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.essay-card[hidden] {
  display: none;
}

.essay-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 32px;
  color: var(--muted);
  font-size: 0.82rem;
}

.topic {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 3px 8px;
  border-radius: 5px;
  color: #fffaf1;
  font-weight: 700;
}

.topic.tech {
  background: var(--teal);
}

.topic.ai {
  background: var(--teal);
}

.topic.finance {
  background: var(--rust);
}

.topic.philosophy {
  background: var(--blue);
}

.topic.life {
  background: var(--olive);
}

.essay-card h3 {
  margin: 0;
  font-size: 1.18rem;
  line-height: 1.38;
}

.essay-card h3 a:hover,
.essay-card h3 a:focus-visible {
  color: var(--teal);
}

.essay-card p {
  margin: 16px 0 0;
  color: var(--muted);
}

.theme-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.theme-item {
  min-height: 230px;
  padding: 24px;
  background: var(--paper-soft);
}

.theme-line {
  display: block;
  width: 48px;
  height: 4px;
  margin-bottom: 26px;
  border-radius: 2px;
}

.tech-line {
  background: var(--teal);
}

.finance-line {
  background: var(--rust);
}

.life-line {
  background: var(--olive);
}

.philosophy-line {
  background: var(--blue);
}

.theme-item h3,
.now-panel h3 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.theme-item p {
  margin: 0;
  color: var(--muted);
}

.split,
.about {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(280px, 1fr);
  gap: 64px;
  align-items: start;
}

.now-panel {
  padding: 28px;
  background: #fffaf1;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.now-panel ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.about {
  padding-top: 42px;
  border-top: 1px solid var(--line);
}

.about-panel {
  padding: 28px;
  background: #fffaf1;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.about-panel h3 {
  margin: 0 0 18px;
  font-size: 1.2rem;
}

.about-list {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.about-list li {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.about-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.about-list strong {
  display: block;
  margin-bottom: 4px;
}

.about-list span {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 40px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
}

.site-footer div {
  display: flex;
  gap: 18px;
}

.article-header {
  color: var(--ink);
  background: rgba(247, 243, 234, 0.88);
  border-bottom: 1px solid var(--line);
}

.article-header .brand-word,
.article-header .site-nav a {
  color: var(--muted);
}

.article-header .brand-mark {
  border-color: var(--line-strong);
}

.article-header .site-nav a:hover,
.article-header .site-nav a:focus-visible {
  color: var(--ink);
}

.article-main {
  padding: 136px 40px 88px;
}

.article-shell {
  width: min(820px, 100%);
  margin: 0 auto;
}

.back-link {
  display: inline-flex;
  margin-bottom: 28px;
  color: var(--teal);
  font-weight: 700;
}

.article-hero {
  padding-bottom: 34px;
  border-bottom: 1px solid var(--line);
}

.article-hero h1 {
  margin: 0;
  font-family:
    Georgia,
    "Times New Roman",
    "Songti SC",
    "SimSun",
    serif;
  font-size: 3.5rem;
  line-height: 1.12;
  letter-spacing: 0;
}

.article-dek {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 0.9rem;
}

.article-meta span {
  overflow-wrap: anywhere;
}

.paper-summary {
  margin-top: 28px;
  padding: 24px;
  background: #fffaf1;
  border: 1px solid rgba(23, 106, 104, 0.32);
  border-left: 4px solid var(--teal);
  border-radius: 8px;
}

.paper-summary p {
  margin: 0;
}

.paper-summary p:not(.eyebrow) {
  color: #2d2923;
  font-size: 1.04rem;
}

.article-body {
  padding-top: 36px;
}

.article-body p {
  margin: 0 0 22px;
  color: #2d2923;
  font-size: 1.04rem;
}

.article-body h2 {
  margin: 44px 0 16px;
  font-family:
    Georgia,
    "Times New Roman",
    "Songti SC",
    "SimSun",
    serif;
  font-size: 1.82rem;
  line-height: 1.25;
  letter-spacing: 0;
}

@media (max-width: 980px) {
  .site-header {
    padding: 0 24px;
  }

  .hero-inner {
    width: min(100% - 48px, 1180px);
  }

  .hero h1 {
    font-size: 3.4rem;
  }

  .intro-grid,
  .section-heading,
  .split,
  .about {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .essay-list,
  .theme-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .article-hero h1 {
    font-size: 2.7rem;
  }
}

@media (max-width: 700px) {
  body {
    font-size: 15px;
  }

  .site-header {
    position: absolute;
    align-items: flex-start;
    min-height: 94px;
    padding: 18px;
    flex-direction: column;
    gap: 12px;
  }

  .site-nav {
    align-self: stretch;
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    font-size: 0.86rem;
  }

  .hero {
    min-height: 760px;
  }

  .hero-image {
    object-position: 62% center;
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(11, 10, 8, 0.88), rgba(11, 10, 8, 0.58)),
      linear-gradient(0deg, rgba(11, 10, 8, 0.72), rgba(11, 10, 8, 0.04) 70%);
  }

  .hero-inner {
    width: calc(100% - 36px);
    padding: 150px 0 34px;
  }

  .hero h1 {
    max-width: 100%;
    font-size: 2.08rem;
    line-height: 1.18;
    overflow-wrap: anywhere;
  }

  .hero h1 span {
    display: block;
  }

  .hero h1 br {
    display: none;
  }

  .hero-copy {
    max-width: 100%;
    font-size: 1rem;
    overflow-wrap: anywhere;
  }

  .signal-row {
    grid-template-columns: 1fr;
    margin-top: 34px;
  }

  .section,
  .section-band {
    padding: 62px 18px;
  }

  .intro h2,
  .section h2 {
    font-size: 2rem;
  }

  .essay-list,
  .theme-grid {
    grid-template-columns: 1fr;
  }

  .essay-card {
    min-height: 0;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 24px 18px;
  }

  .article-header {
    position: static;
  }

  .article-main {
    padding: 44px 18px 62px;
  }

  .article-hero h1 {
    font-size: 2.18rem;
  }

  .article-dek,
  .article-body p,
  .paper-summary p:not(.eyebrow) {
    font-size: 1rem;
  }
}