:root {
  --bg-app: #F2EFE9;
  --bg-surface: #FCFBFA;
  --bg-panel: #F4F7F5;
  --bg-tint: #E8EFEA;
  --primary: #6B8E7B;
  --primary-strong: #678775;
  --foreground: #4A5D53;
  --body: #333333;
  --subtle: #8A9A91;
  --muted: #A0B0A6;
  --line: #E0E7E2;
  --inverse: #FFFFFF;

  --font-serif: "Noto Serif SC", Georgia, "Songti SC", "SimSun", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", STHeiti, "Microsoft Yahei", Tahoma, Simsun, sans-serif;

  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-full: 9999px;
  --shadow-md: 0 10px 28px rgba(57, 68, 63, 0.08), 0 2px 8px rgba(57, 68, 63, 0.05);
  --shadow-lg: 0 18px 40px rgba(57, 68, 63, 0.12), 0 4px 12px rgba(57, 68, 63, 0.06);
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: linear-gradient(180deg, #f4f1ec 0%, var(--bg-app) 100%);
  color: var(--body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

.container {
  width: min(1160px, calc(100% - 2rem));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(252, 251, 250, 0.86);
  border-bottom: 1px solid rgba(224, 231, 226, 0.85);
}

.topbar-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--foreground);
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--bg-tint);
  color: var(--primary);
}

.topbar-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  color: var(--subtle);
  font-size: 0.95rem;
}

.topbar-links a:hover {
  color: var(--primary);
}

.topbar-cta {
  padding: 0.7rem 1.25rem;
  border-radius: var(--radius-full);
  background: var(--primary);
  color: var(--inverse) !important;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 5rem 0 3rem;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(6px);
  pointer-events: none;
}

.hero-glow-left {
  top: -6rem;
  left: -8rem;
  width: 22rem;
  height: 22rem;
  background: radial-gradient(circle, rgba(117, 150, 132, 0.16) 0%, transparent 68%);
}

.hero-glow-right {
  right: -6rem;
  top: 2rem;
  width: 24rem;
  height: 24rem;
  background: radial-gradient(circle, rgba(231, 218, 200, 0.45) 0%, transparent 70%);
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: var(--space-xl);
  align-items: start;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-full);
  background: var(--bg-tint);
  color: var(--primary-strong);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 1.25rem 0 1rem;
  font-family: var(--font-serif);
  font-size: clamp(2.3rem, 5vw, 4.2rem);
  line-height: 1.18;
  color: var(--foreground);
}

.hero-lead {
  max-width: 34rem;
  font-size: 1.05rem;
  color: var(--subtle);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--primary);
  color: var(--inverse);
  box-shadow: 0 10px 24px rgba(107, 142, 123, 0.24);
}

.btn-secondary {
  background: rgba(252, 251, 250, 0.72);
  color: var(--primary-strong);
  border: 1px solid rgba(224, 231, 226, 0.95);
}

.hero-aside {
  display: grid;
  gap: 1rem;
}

.aside-card {
  padding: 1.4rem 1.4rem 1.5rem;
  border-radius: var(--radius-lg);
  background: rgba(252, 251, 250, 0.9);
  border: 1px solid rgba(224, 231, 226, 0.88);
  box-shadow: var(--shadow-md);
}

.aside-card-soft {
  background: linear-gradient(180deg, rgba(244, 247, 245, 0.98) 0%, rgba(252, 251, 250, 0.94) 100%);
}

.aside-card h2,
.resource-card h3,
.next-step h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-serif);
  color: var(--foreground);
}

.aside-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--secondary, var(--subtle));
}

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

.article-shell {
  padding: 1rem 0 4rem;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: var(--space-xl);
  align-items: start;
}

.article-card {
  padding: clamp(1.4rem, 3vw, 2.4rem);
  border-radius: 32px;
  background: rgba(252, 251, 250, 0.97);
  border: 1px solid rgba(224, 231, 226, 0.9);
  box-shadow: var(--shadow-lg);
}

.article-status {
  margin-bottom: 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.markdown-body {
  color: var(--body);
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  font-family: var(--font-serif);
  color: var(--foreground);
  line-height: 1.4;
}

.markdown-body h1 {
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  margin: 0 0 1rem;
}

.markdown-body h2 {
  font-size: clamp(1.35rem, 2.5vw, 1.8rem);
  margin: 2.2rem 0 0.9rem;
}

.markdown-body h3 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.7rem;
}

.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body blockquote {
  margin: 0 0 1rem;
}

.markdown-body p,
.markdown-body li {
  font-size: 1rem;
  line-height: 1.95;
}

.markdown-body ul,
.markdown-body ol {
  padding-left: 1.3rem;
}

.markdown-body li + li {
  margin-top: 0.35rem;
}

.markdown-body strong {
  color: var(--foreground);
}

.markdown-body blockquote {
  padding: 0.15rem 0 0.15rem 1rem;
  border-left: 3px solid var(--primary);
  color: var(--subtle);
  background: rgba(244, 247, 245, 0.82);
  border-radius: 0 16px 16px 0;
}

.markdown-body hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 1.8rem 0;
}

.markdown-body img {
  width: 100%;
  margin: 1rem 0 1.25rem;
  border-radius: 22px;
  box-shadow: 0 16px 36px rgba(57, 68, 63, 0.12);
}

.resources-panel {
  display: grid;
  gap: 1rem;
  position: sticky;
  top: 96px;
}

.resource-card {
  padding: 1.2rem 1.2rem 1.3rem;
  border-radius: 24px;
  background: rgba(252, 251, 250, 0.92);
  border: 1px solid rgba(224, 231, 226, 0.92);
  box-shadow: var(--shadow-md);
}

.resource-label {
  margin: 0 0 0.4rem;
  color: var(--primary-strong);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.resource-card p {
  margin: 0;
  color: var(--subtle);
  font-size: 0.94rem;
  line-height: 1.8;
}

.resource-card a {
  margin-top: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--primary-strong);
  font-weight: 600;
}

.book-note {
  margin-top: 0.9rem;
  padding: 0.75rem 0.9rem;
  border-radius: 16px;
  background: var(--bg-panel);
  color: var(--foreground);
  font-size: 0.9rem;
}

.next-step {
  padding: 0 0 4rem;
}

.next-step-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
  padding: 2rem 2.25rem;
  border-radius: 30px;
  background: linear-gradient(135deg, rgba(74, 93, 83, 0.96) 0%, rgba(92, 117, 102, 0.96) 100%);
  color: var(--inverse);
  box-shadow: var(--shadow-lg);
}

.next-step h2 {
  color: var(--inverse);
  margin-bottom: 0.65rem;
}

.next-step p {
  margin: 0;
  max-width: 40rem;
  color: rgba(255, 255, 255, 0.76);
}

.next-step .resource-label {
  color: rgba(255, 255, 255, 0.72);
}

@media (max-width: 1024px) {
  .hero-inner,
  .article-layout,
  .next-step-inner {
    grid-template-columns: 1fr;
  }

  .article-layout {
    display: grid;
  }

  .resources-panel {
    position: static;
  }
}

@media (max-width: 720px) {
  .topbar-inner {
    min-height: 64px;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 0.7rem 0;
  }

  .topbar-links {
    width: 100%;
    justify-content: space-between;
  }

  .hero {
    padding: 3.2rem 0 2rem;
  }

  .hero-actions,
  .topbar-links {
    gap: 0.75rem;
  }

  .hero-actions .btn,
  .next-step .btn {
    width: 100%;
  }

  .article-shell {
    padding-bottom: 3rem;
  }

  .article-card,
  .resource-card,
  .aside-card,
  .next-step-inner {
    border-radius: 24px;
  }

  .next-step-inner {
    padding: 1.5rem;
  }
}