:root {
  --ink: #1f2933;
  --muted: #607083;
  --line: #d8dee5;
  --paper: #fbfaf7;
  --band: #eef4f1;
  --accent: #196f6b;
  --accent-2: #9a5b22;
  --card: #ffffff;
  --essay-ink: #182523;
  --essay-accent: #b84b3d;
  --essay-accent-soft: #f3ded7;
  --essay-sage: #dce9e3;
  --essay-sand: #f3eadc;
  --essay-night: #172826;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans CJK SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.68;
  font-size: 16px;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.wrap {
  width: min(1040px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  background: var(--band);
  border-bottom: 1px solid var(--line);
}

.nav {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-weight: 800;
  font-size: 20px;
  color: var(--ink);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 18px;
  font-size: 14px;
}

.hero {
  padding: 58px 0 32px;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 36px;
  align-items: center;
}

.hero-photo {
  width: 260px;
  aspect-ratio: 1;
  object-fit: cover;
  object-position: 58% 38%;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.hero h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero p {
  max-width: 820px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-2);
  font-size: 14px;
  font-weight: 750;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-top: 22px;
}

.hero-actions a {
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: var(--card);
  font-weight: 700;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.focus-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card {
  display: block;
  min-height: 190px;
  padding: 22px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  background: var(--card);
}

.feature-card span {
  color: var(--accent-2);
  font-size: 14px;
  font-weight: 750;
}

.feature-card h3 {
  margin: 10px 0 8px;
  color: var(--ink);
  font-size: 22px;
  line-height: 1.25;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
}

.achievement-list {
  display: grid;
  gap: 12px;
}

.achievement-item {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  background: var(--card);
}

.achievement-item span {
  color: var(--accent-2);
  font-size: 13px;
  font-weight: 750;
}

.achievement-item h3 {
  margin: 6px 0 4px;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.3;
}

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

.evidence-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-top: 8px !important;
  font-size: 14px;
  font-weight: 700;
}

.section {
  padding: 34px 0;
}

.section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.section-title h2 {
  margin: 0;
  color: var(--accent);
  font-size: 22px;
}

.post-list {
  display: grid;
  gap: 14px;
}

.post-card {
  display: block;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: 0 14px 14px 0;
  background: var(--card);
  box-shadow: 0 8px 28px rgba(24, 37, 35, 0.04);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.post-card:hover {
  border-color: #b9c9c5;
  box-shadow: 0 14px 34px rgba(24, 37, 35, 0.09);
  text-decoration: none;
  transform: translateY(-2px);
}

.post-card h2,
.post-card h3 {
  margin: 0;
  color: var(--ink);
  font-size: 20px;
}

.post-card p {
  margin: 8px 0 0;
  color: var(--muted);
}

.post-card-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 7px 12px;
  margin-bottom: 7px;
}

.post-topic {
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--essay-sand);
  color: #725135;
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.04em;
}

.post-date,
.post-meta {
  color: var(--accent-2);
  font-size: 14px;
  font-weight: 650;
}

.post {
  padding: 30px 0 72px;
}

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

.post-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 0.65fr);
  gap: clamp(36px, 6vw, 72px);
  align-items: center;
  margin-top: 34px;
}

.post-heading h1 {
  max-width: 760px;
  margin: 12px 0 18px;
  color: var(--essay-ink);
  font-family: Georgia, "Noto Serif CJK SC", "Songti SC", SimSun, serif;
  font-size: clamp(34px, 5vw, 58px);
  font-weight: 760;
  line-height: 1.18;
  letter-spacing: -0.025em;
}

.post-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--essay-accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.13em;
}

.post-eyebrow::before {
  width: 22px;
  height: 2px;
  background: currentColor;
  content: "";
}

.post-deck {
  max-width: 680px;
  margin: 0 0 22px;
  color: #536762;
  font-family: Georgia, "Noto Serif CJK SC", "Songti SC", SimSun, serif;
  font-size: clamp(18px, 2vw, 21px);
  line-height: 1.72;
}

.back-link {
  font-size: 14px;
}

.essay-map {
  position: relative;
  min-height: 310px;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(25, 111, 107, 0.16);
  border-radius: 30px;
  background:
    radial-gradient(circle at 18% 12%, rgba(255, 255, 255, 0.96), transparent 32%),
    radial-gradient(circle at 86% 88%, rgba(184, 75, 61, 0.17), transparent 35%),
    linear-gradient(145deg, var(--essay-sage), var(--essay-sand));
  box-shadow: 0 24px 60px rgba(24, 40, 38, 0.13);
}

.essay-map::before,
.essay-map::after {
  position: absolute;
  border: 1px solid rgba(25, 111, 107, 0.16);
  border-radius: 50%;
  content: "";
}

.essay-map::before {
  inset: 38px 48px 56px;
}

.essay-map::after {
  inset: 82px 92px 100px;
}

.essay-map-orbit {
  position: absolute;
  inset: 50%;
  width: 1px;
  height: 1px;
  box-shadow:
    -92px -67px 0 0 rgba(25, 111, 107, 0.28),
    102px -50px 0 0 rgba(184, 75, 61, 0.28),
    22px 92px 0 0 rgba(154, 91, 34, 0.28);
}

.essay-map-core,
.essay-map-node {
  position: absolute;
  z-index: 1;
  display: grid;
  place-items: center;
  border-radius: 999px;
  font-weight: 800;
  box-shadow: 0 10px 24px rgba(24, 40, 38, 0.12);
}

.essay-map-core {
  top: 50%;
  left: 50%;
  width: 94px;
  height: 94px;
  padding: 12px;
  background: var(--essay-night);
  color: #fffaf0;
  font-family: Georgia, "Noto Serif CJK SC", "Songti SC", SimSun, serif;
  font-size: 18px;
  text-align: center;
  transform: translate(-50%, -50%);
}

.essay-map-node {
  min-width: 78px;
  min-height: 38px;
  padding: 7px 13px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  background: rgba(255, 255, 255, 0.84);
  color: #4b5f5a;
  font-size: 13px;
  backdrop-filter: blur(8px);
}

.essay-map-node-1 {
  top: 14%;
  left: 8%;
}

.essay-map-node-2 {
  top: 19%;
  right: 7%;
}

.essay-map-node-3 {
  right: 14%;
  bottom: 17%;
}

.essay-map figcaption {
  position: absolute;
  bottom: 17px;
  left: 22px;
  max-width: calc(100% - 44px);
  color: rgba(24, 37, 35, 0.62);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.post-thesis {
  position: relative;
  max-width: 900px;
  margin: 44px auto 0;
  padding: 38px 46px 32px 78px;
  overflow: hidden;
  border: 0;
  border-radius: 24px;
  background:
    radial-gradient(circle at 100% 0, rgba(184, 75, 61, 0.24), transparent 36%),
    var(--essay-night);
  color: #f8f5ed;
  box-shadow: 0 22px 48px rgba(18, 37, 34, 0.16);
}

.post-thesis::before {
  position: absolute;
  top: 12px;
  left: 25px;
  color: #ff7564;
  content: "“";
  font-family: Georgia, serif;
  font-size: 74px;
  font-weight: 800;
  line-height: 1;
}

.post-thesis p {
  margin: 0;
  font-family: Georgia, "Noto Serif CJK SC", "Songti SC", SimSun, serif;
  font-size: clamp(19px, 2.4vw, 25px);
  font-weight: 700;
  line-height: 1.75;
}

.post-thesis cite {
  display: block;
  margin-top: 16px;
  color: #aabbb6;
  font-size: 13px;
  font-style: normal;
  text-align: right;
}

.post-content {
  max-width: 780px;
  margin: 0 auto;
  padding-top: 42px;
  color: #2a3734;
  font-size: 18px;
  line-height: 1.94;
  counter-reset: essay-section;
}

.post-content > p:first-child {
  color: #3f514d;
  font-family: Georgia, "Noto Serif CJK SC", "Songti SC", SimSun, serif;
  font-size: 20px;
  line-height: 1.9;
}

.post-content p {
  margin: 1.25em 0;
}

.post-content h2 {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  margin: 3.1em 0 1.1em;
  color: var(--essay-ink);
  font-family: Georgia, "Noto Serif CJK SC", "Songti SC", SimSun, serif;
  font-size: clamp(24px, 3.2vw, 32px);
  line-height: 1.4;
  counter-increment: essay-section;
}

.post-content h2::before {
  color: var(--essay-accent);
  content: "0" counter(essay-section);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.08em;
}

.post-content h3 {
  margin-top: 2.3em;
  color: var(--accent-2);
  font-size: 21px;
}

.post-content strong {
  color: #22312e;
  background: linear-gradient(transparent 68%, rgba(184, 75, 61, 0.18) 0);
  font-weight: 780;
}

.post-content a {
  text-decoration: underline;
  text-decoration-color: rgba(25, 111, 107, 0.35);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.post-content blockquote:not(.post-thesis) {
  margin: 2em 0;
  padding: 22px 26px;
  border: 0;
  border-left: 4px solid var(--essay-accent);
  border-radius: 0 14px 14px 0;
  background: var(--essay-accent-soft);
  color: #533c37;
  font-family: Georgia, "Noto Serif CJK SC", "Songti SC", SimSun, serif;
  font-size: 19px;
}

.post-content blockquote p:first-child {
  margin-top: 0;
}

.post-content blockquote p:last-child {
  margin-bottom: 0;
}

.post-content ul,
.post-content ol {
  margin: 1.3em 0;
  padding-left: 1.35em;
}

.post-content li {
  margin: 0.55em 0;
  padding-left: 0.3em;
}

.post-content li::marker {
  color: var(--essay-accent);
  font-weight: 800;
}

.post-content .highlighter-rouge {
  position: relative;
  margin: 2.4em -26px;
  padding: 46px 28px 26px;
  overflow: hidden;
  border: 1px solid rgba(25, 111, 107, 0.18);
  border-radius: 20px;
  background:
    radial-gradient(circle at 100% 0, rgba(184, 75, 61, 0.11), transparent 34%),
    linear-gradient(145deg, #f5f1e9, #edf4f0);
  box-shadow: 0 16px 34px rgba(24, 40, 38, 0.08);
}

.post-content .highlighter-rouge::before {
  position: absolute;
  top: 15px;
  left: 22px;
  color: var(--essay-accent);
  content: "结构图";
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.13em;
}

.post-content .highlight {
  background: transparent;
}

.post-content pre {
  margin: 0;
  overflow-x: auto;
  color: #31443f;
  background: transparent;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 14px;
  line-height: 1.72;
}

.post-content img {
  display: block;
  max-width: 100%;
  margin: 2em auto;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 16px 40px rgba(24, 40, 38, 0.1);
}

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  padding: 22px 0 34px;
  font-size: 14px;
}

@media (max-width: 720px) {
  .wrap {
    width: min(100% - 24px, 1040px);
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 16px 0;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero {
    padding: 36px 0 24px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-photo {
    width: min(220px, 68vw);
    grid-row: 1;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .post {
    padding-top: 22px;
  }

  .post-hero-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-top: 24px;
  }

  .post-heading h1 {
    font-size: clamp(32px, 10.5vw, 45px);
  }

  .essay-map {
    min-height: 260px;
    border-radius: 22px;
  }

  .post-thesis {
    margin-top: 30px;
    padding: 34px 24px 28px 54px;
    border-radius: 18px;
  }

  .post-thesis::before {
    left: 14px;
    font-size: 60px;
  }

  .post-content {
    padding-top: 30px;
    font-size: 17px;
    line-height: 1.88;
  }

  .post-content > p:first-child {
    font-size: 18px;
  }

  .post-content h2 {
    margin-top: 2.7em;
  }

  .post-content .highlighter-rouge {
    margin-right: 0;
    margin-left: 0;
    padding-right: 18px;
    padding-left: 18px;
    border-radius: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .post-card {
    transition: none;
  }
}