:root {
  --bg: #f6f3ef;
  --surface: #ffffff;
  --surface-muted: #f2eeea;
  --text: #1f1f1f;
  --muted: #6b6b6b;
  --primary: #0f3d2e;
  --accent: #c46a3b;
  --border: #e3ddd6;
  --shadow: 0 18px 40px rgba(24, 24, 24, 0.08);
  --radius: 16px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Inter", "Noto Serif SC", serif;
  color: var(--text);
  background: radial-gradient(circle at top, #fff7ea 0%, #f6f3ef 50%, #efe8e2 100%);
  min-height: 100vh;
  line-height: 1.6;
}

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

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

.container {
  width: min(1120px, 100% - 40px);
  margin: 0 auto;
}

.header {
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(12px);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(140deg, var(--primary), #18493a);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 18px;
}

.logo-text {
  font-size: 18px;
}

.nav {
  display: flex;
  gap: 18px;
}

.nav-link {
  color: var(--muted);
  font-size: 14px;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary);
  border-color: var(--accent);
}

.main {
  padding: 40px 0 80px;
}

.hero {
  padding: 64px 0 48px;
}

.hero-title {
  font-size: clamp(32px, 4vw, 52px);
  letter-spacing: -0.03em;
  font-weight: 700;
  color: var(--primary);
}

.hero-subtitle {
  margin-top: 12px;
  font-size: 18px;
  color: var(--muted);
  max-width: 640px;
}

.articles-section {
  padding-bottom: 40px;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  min-height: 100%;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 50px rgba(24, 24, 24, 0.12);
}

.article-cover {
  height: 180px;
  overflow: hidden;
}

.article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-body {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.article-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.article-source {
  background: var(--surface-muted);
  color: var(--primary);
  padding: 4px 10px;
  border-radius: 999px;
}

.article-date {
  color: var(--muted);
}

.article-title a {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  display: inline-block;
}

.article-title a:hover {
  color: var(--accent);
}

.article-quote {
  position: relative;
  padding: 16px 16px 16px 40px;
  background: var(--surface-muted);
  border-left: 3px solid var(--accent);
  border-radius: 12px;
  color: #4a3a31;
  font-size: 14px;
}

.quote-icon {
  position: absolute;
  top: 8px;
  left: 12px;
  font-size: 24px;
  color: var(--accent);
}

.article-comment {
  background: #fef8f1;
  border: 1px solid #f4ddc5;
  border-radius: 12px;
  padding: 14px 16px;
}

.comment-label {
  display: inline-block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 6px;
}

.article-preview {
  color: var(--muted);
  font-size: 15px;
}

.article-link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--primary);
}

.article-link svg {
  transition: transform 0.2s ease;
}

.article-link:hover svg {
  transform: translateX(4px);
}

.empty-state {
  padding: 80px 0;
  text-align: center;
  color: var(--muted);
}

.footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.article-detail {
  padding: 40px 0 80px;
}

.article-header {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.back-link,
.original-link,
.back-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
}

.original-link {
  color: var(--accent);
}

.article-title {
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 700;
  color: var(--text);
}

.article-cover-large {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin: 24px 0 32px;
}

.article-content-wrapper {
  display: grid;
  gap: 24px;
}

.quotes-section,
.comment-section,
.content-section {
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 24px;
  box-shadow: var(--shadow);
}

.section-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.section-icon {
  font-size: 20px;
}

.quotes-block {
  color: #4a3a31;
  font-style: italic;
  background: var(--surface-muted);
  padding: 18px;
  border-radius: 12px;
  border-left: 3px solid var(--accent);
}

.comment-block {
  background: #fef8f1;
  padding: 18px;
  border-radius: 12px;
  border: 1px solid #f4ddc5;
}

.content-block {
  color: var(--text);
  font-size: 16px;
  line-height: 1.8;
}

/* 内容区Markdown样式 */
.content-block h1,
.content-block h2,
.content-block h3,
.content-block h4 {
  color: var(--primary);
  font-weight: 600;
  margin: 28px 0 14px 0;
  line-height: 1.4;
}

.content-block h1:first-child,
.content-block h2:first-child,
.content-block h3:first-child {
  margin-top: 0;
}

.content-block h1 {
  font-size: 24px;
}

.content-block h2 {
  font-size: 20px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
}

.content-block h3 {
  font-size: 18px;
  color: var(--accent);
}

.content-block h4 {
  font-size: 16px;
}

.content-block p {
  margin: 0 0 16px 0;
  text-align: justify;
}

.content-block ul,
.content-block ol {
  margin: 0 0 20px 0;
  padding-left: 24px;
}

.content-block li {
  margin-bottom: 10px;
  line-height: 1.7;
}

.content-block li::marker {
  color: var(--accent);
}

.content-block strong {
  color: var(--primary);
  font-weight: 600;
}

.content-block em {
  font-style: italic;
  color: var(--muted);
}

.content-block blockquote {
  margin: 20px 0;
  padding: 16px 20px;
  background: var(--surface-muted);
  border-left: 4px solid var(--accent);
  border-radius: 0 12px 12px 0;
  font-style: italic;
  color: #4a3a31;
}

.content-block code {
  background: var(--surface-muted);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Menlo', 'Monaco', monospace;
  font-size: 14px;
}

.content-block hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 28px 0;
}

.article-footer {
  margin-top: 32px;
}

.back-button {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 8px 16px;
}

@media (max-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .header .container {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }

  .hero {
    padding: 48px 0 32px;
  }

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

  .article-body {
    padding: 18px;
  }
}