:root {
  --bg: #f6f0e7;
  --bg-soft: #efe5d8;
  --panel: rgba(255, 251, 245, 0.88);
  --panel-strong: rgba(255, 248, 239, 0.96);
  --panel-paper: rgba(255, 255, 255, 0.75);
  --text: #241f18;
  --muted: #756757;
  --line: rgba(101, 76, 44, 0.14);
  --accent: #497eb7;
  --accent-soft: rgba(73, 126, 183, 0.12);
  --gold: #99724e;
  --gold-soft: rgba(153, 114, 78, 0.12);
  --shadow: 0 24px 60px rgba(105, 84, 56, 0.12);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --frame: min(1200px, calc(100vw - 40px));
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Iowan Old Style", "Palatino Linotype", "Times New Roman", Georgia, "Songti SC", "STSong", serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(217, 183, 138, 0.22), transparent 24%),
    radial-gradient(circle at 86% 12%, rgba(125, 167, 210, 0.18), transparent 18%),
    linear-gradient(180deg, #fbf6ef 0%, #f5eee4 44%, #efe6da 100%);
  color: var(--text);
  font-family: var(--font-sans);
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  background-image:
    linear-gradient(rgba(93, 76, 58, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(93, 76, 58, 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: radial-gradient(circle at center, black 40%, transparent 100%);
  opacity: 0.45;
}

body::after {
  background:
    radial-gradient(circle at 14% 22%, rgba(125, 167, 210, 0.1), transparent 0 18%),
    radial-gradient(circle at 85% 78%, rgba(214, 175, 126, 0.09), transparent 0 16%);
}

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

img {
  max-width: 100%;
  display: block;
}

.site-frame {
  width: var(--frame);
  margin: 0 auto;
  padding: 24px 0 72px;
}

.site-header {
  position: sticky;
  top: 16px;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 18px;
  margin-bottom: 24px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 250, 244, 0.78);
  backdrop-filter: blur(18px);
  box-shadow: 0 14px 42px rgba(104, 85, 60, 0.08);
}

.brand-lockup {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}

.brand-mark {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-name {
  color: #3a3026;
  font-size: 0.98rem;
  font-weight: 600;
}

.brand-sub {
  color: var(--muted);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.site-nav a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.92rem;
  transition: background-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--text);
  background: rgba(73, 126, 183, 0.08);
  transform: translateY(-1px);
}

.page-stack {
  display: grid;
  gap: 28px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(320px, 0.95fr);
  gap: 24px;
  align-items: stretch;
}

.hero-single {
  grid-template-columns: 1fr;
}

.hero-main,
.hero-aside,
.panel,
.article-shell,
.note-card,
.lab-card,
.path-card,
.now-card,
.contact-card,
.empty-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(255, 252, 247, 0.92) 0%, rgba(251, 245, 237, 0.98) 100%);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero-main {
  padding: 40px 40px 36px;
  position: relative;
  overflow: hidden;
}

.hero-main-minimal {
  max-width: 920px;
}

.hero-main::after {
  content: "";
  position: absolute;
  inset: auto -120px -160px auto;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(125, 167, 210, 0.18) 0%, transparent 70%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero-title,
.section-title,
.article-title,
.note-title,
.lab-title {
  margin: 0;
  font-family: var(--font-serif);
  line-height: 0.95;
}

.hero-title {
  max-width: 10ch;
  font-size: clamp(3rem, 7vw, 5.8rem);
  letter-spacing: 0.02em;
}

.hero-subtitle {
  margin: 16px 0 0;
  font-size: clamp(1.2rem, 2vw, 1.75rem);
  color: #31281f;
}

.hero-copy {
  max-width: 54ch;
  margin: 18px 0 0;
  color: #625647;
  line-height: 1.8;
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button,
.button-secondary,
.link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.button {
  background: linear-gradient(135deg, rgba(73, 126, 183, 0.94), rgba(97, 148, 199, 0.94));
  color: #f7f4ef;
  box-shadow: 0 14px 34px rgba(73, 126, 183, 0.2);
}

.button-secondary {
  border: 1px solid rgba(101, 76, 44, 0.16);
  background: rgba(255, 255, 255, 0.55);
  color: var(--text);
}

.button:hover,
.button-secondary:hover,
.link-button:hover {
  transform: translateY(-2px);
}

.hero-aside {
  display: grid;
  gap: 14px;
  padding: 22px;
}

.focus-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.focus-header strong {
  font-size: 1rem;
}

.status-pill {
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--gold-soft);
  color: var(--gold);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

.focus-item,
.mini-note {
  padding: 14px 16px;
  border: 1px solid rgba(101, 76, 44, 0.12);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.62);
}

.focus-item.is-compact {
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.78);
}

.focus-item span,
.mini-note span {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.focus-item strong,
.mini-note strong {
  display: block;
  font-size: 0.98rem;
  line-height: 1.5;
}

.section {
  display: grid;
  gap: 18px;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 18px;
  align-items: end;
}

.section-title {
  font-size: clamp(2rem, 3.8vw, 3rem);
}

.section-copy {
  max-width: 54ch;
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.8;
}

.section-link {
  color: var(--gold);
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.grid-three,
.grid-two {
  display: grid;
  gap: 18px;
}

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

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

.path-card,
.lab-card,
.note-card,
.now-card,
.contact-card,
.empty-card {
  padding: 22px;
}

.path-card {
  position: relative;
  overflow: hidden;
}

.path-card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, rgba(223, 186, 139, 0.7), rgba(139, 194, 255, 0.7), transparent);
}

.card-label,
.article-meta,
.note-meta,
.lab-meta,
.meta-pair {
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.path-card h3,
.lab-title,
.note-title,
.article-title {
  font-size: 1.6rem;
}

.path-card p,
.lab-summary,
.note-summary,
.contact-card p,
.empty-card p {
  margin: 12px 0 0;
  color: #625647;
  line-height: 1.75;
}

.lab-card {
  display: grid;
  gap: 14px;
}

.lab-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

.link-button {
  padding: 0;
  min-height: auto;
  color: var(--accent);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 18px;
}

.split-section-home {
  align-items: start;
}

.panel {
  padding: 26px;
}

.panel-compact {
  display: grid;
  gap: 18px;
}

.section-head-compact {
  align-items: center;
}

.panel p:last-child {
  margin-bottom: 0;
}

.article-shell {
  max-width: 920px;
  margin: 0 auto;
  padding: 34px;
}

.article-header {
  display: grid;
  gap: 14px;
  padding-bottom: 22px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--line);
}

.article-title {
  font-size: clamp(2.4rem, 5vw, 4rem);
}

.article-summary {
  max-width: 52ch;
  margin: 0;
  color: #625647;
  line-height: 1.8;
  font-size: 1rem;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
}

.meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(73, 126, 183, 0.08);
  color: var(--muted);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.writing-note {
  margin-bottom: 26px;
  padding: 16px 18px;
  border: 1px solid rgba(73, 126, 183, 0.18);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(73, 126, 183, 0.08) 0%, rgba(255, 255, 255, 0.58) 100%);
}

.writing-note strong {
  display: block;
  margin-bottom: 8px;
  color: #2f4661;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
}

.writing-note p {
  margin: 0;
  color: #534637;
  line-height: 1.75;
  font-size: 0.96rem;
}

.prose {
  color: #342b22;
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.95;
}

.prose > *:first-child {
  margin-top: 0;
}

.prose h2,
.prose h3 {
  font-family: var(--font-serif);
  margin-top: 2.2rem;
  margin-bottom: 0.8rem;
  line-height: 1.15;
}

.prose h2 {
  font-size: 2rem;
}

.prose h3 {
  font-size: 1.5rem;
}

.prose p,
.prose ul,
.prose ol,
.prose blockquote {
  margin: 1rem 0;
}

.prose ul,
.prose ol {
  padding-left: 1.35rem;
}

.prose li + li {
  margin-top: 0.5rem;
}

.prose blockquote {
  padding: 16px 18px;
  border-left: 3px solid rgba(73, 126, 183, 0.55);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(73, 126, 183, 0.08);
  color: #342b22;
}

.prose code {
  padding: 0.18rem 0.42rem;
  border-radius: 0.45rem;
  background: rgba(73, 126, 183, 0.08);
  color: #3d4e63;
  font-family: var(--font-mono);
  font-size: 0.92rem;
}

.prose pre {
  overflow: auto;
  padding: 16px;
  border: 1px solid rgba(101, 76, 44, 0.12);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.68);
}

.prose pre code {
  padding: 0;
  background: transparent;
}

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.list-shell {
  display: grid;
  gap: 16px;
}

.note-card {
  display: grid;
  gap: 12px;
}

.note-title {
  margin: 0;
}

.note-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.note-link {
  color: var(--accent);
  font-weight: 700;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.back-link:hover {
  color: var(--text);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.contact-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1rem;
}

.contact-card span {
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.empty-card {
  background: linear-gradient(180deg, rgba(255, 249, 242, 0.96), rgba(250, 243, 234, 0.98));
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 16px;
  margin-top: 28px;
  padding: 22px 4px 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.icp-link {
  color: var(--muted);
  text-decoration: none;
  transition: color 180ms ease;
}

.icp-link:hover {
  color: var(--text);
}

@media (max-width: 1080px) {
  .hero,
  .split-section,
  .grid-three,
  .grid-two {
    grid-template-columns: 1fr;
  }

  .hero-title {
    max-width: none;
  }
}

@media (max-width: 760px) {
  .site-frame {
    width: min(100vw - 22px, 1200px);
    padding-top: 16px;
  }

  .site-header {
    border-radius: 24px;
    padding: 16px;
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    width: 100%;
    justify-content: flex-start;
  }

  .hero-main,
  .hero-aside,
  .panel,
  .article-shell,
  .note-card,
  .lab-card,
  .path-card,
  .now-card,
  .contact-card,
  .empty-card {
    border-radius: 24px;
  }

  .hero-main,
  .hero-aside,
  .panel,
  .article-shell {
    padding: 22px;
  }

  .hero-title {
    font-size: 3.2rem;
  }

  .article-title,
  .section-title {
    font-size: 2.4rem;
  }

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