:root {
  --bg: #f5f7fb;
  --bg-soft: #eef2ff;
  --card: rgba(255, 255, 255, 0.82);
  --text: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --link: #2563eb;
  --link-hover: #1d4ed8;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --radius: 20px;
  --max: 860px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --bg-soft: #111827;
    --card: rgba(17, 24, 39, 0.88);
    --text: #f3f4f6;
    --muted: #9ca3af;
    --line: #1f2937;
    --link: #60a5fa;
    --link-hover: #93c5fd;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, var(--bg-soft), transparent 30%),
    radial-gradient(circle at top right, var(--bg-soft), transparent 25%),
    var(--bg);
  line-height: 1.8;
}

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

a:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  position: sticky;
  top: 0;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.55);
  border-bottom: 1px solid var(--line);
  z-index: 10;
}

@media (prefers-color-scheme: dark) {
  .site-header {
    background: rgba(11, 18, 32, 0.6);
  }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.brand {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

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

.nav a {
  color: var(--muted);
  font-size: 14px;
}

.nav a:hover {
  color: var(--text);
  text-decoration: none;
}

.hero {
  padding: 56px 0 28px;
}

.hero-card,
.content-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 36px 32px;
}

.hero-title {
  margin: 0 0 10px;
  font-size: 44px;
  line-height: 1.15;
}

.hero-desc {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.section-title {
  font-size: 28px;
  margin: 0 0 18px;
}

.content-wrap {
  padding-bottom: 48px;
}

.content-card {
  padding: 28px 28px;
}

.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-list li + li {
  border-top: 1px solid var(--line);
}

.post-item {
  display: block;
  padding: 18px 0;
}

.post-item-title {
  display: inline-block;
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
}

.post-item-title:hover {
  color: var(--link);
  text-decoration: none;
}

.post-item-meta {
  color: var(--muted);
  font-size: 14px;
}

.post-title {
  margin: 0 0 10px;
  font-size: 48px;
  line-height: 1.18;
}

.post-meta {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 26px;
}

.post-content {
  font-size: 18px;
}

.post-content h2,
.post-content h3 {
  margin-top: 1.8em;
  line-height: 1.35;
}

.post-content p {
  margin: 1em 0;
}

.post-content code {
  background: rgba(127, 127, 127, 0.12);
  padding: 2px 6px;
  border-radius: 8px;
  font-size: 0.92em;
}

.back-link {
  display: inline-block;
  margin-top: 28px;
  font-weight: 600;
}

.site-footer {
  padding: 0 0 48px;
}

.footer-inner {
  color: var(--muted);
  font-size: 14px;
  text-align: center;
  padding-top: 10px;
}

@media (max-width: 640px) {
  .hero-title {
    font-size: 34px;
  }

  .post-title {
    font-size: 36px;
  }

  .hero-card,
  .content-card {
    padding: 22px 18px;
  }

  .nav {
    gap: 12px;
  }
}

pre {
  background: #0f172a;
  color: #e5e7eb;
  padding: 18px 20px;
  border-radius: 14px;
  overflow-x: auto;
  line-height: 1.6;
  margin: 1.2em 0;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}

pre code {
  background: transparent;
  padding: 0;
  border-radius: 0;
  color: inherit;
  font-size: 14px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

:not(pre) > code {
  background: rgba(127, 127, 127, 0.14);
  color: #c2410c;
  padding: 2px 8px;
  border-radius: 8px;
  font-size: 0.92em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :not(pre) > code {
    color: #fdba74;
    background: rgba(255, 255, 255, 0.08);
  }
}

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

.brand-avatar {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  object-fit: cover;
  border: 2px solid rgba(127, 127, 127, 0.15);
}

.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

.brand-wrap:hover {
  text-decoration: none;
}

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

.brand-avatar {
  width: 42px;
  height: 42px;
  border-radius: 999px;
  object-fit: cover;
  border: 2px solid rgba(127, 127, 127, 0.15);
}

.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}

.brand-wrap:hover {
  text-decoration: none;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 28px;
  align-items: center;
}

.hero-copy {
  min-width: 0;
}

.hero-media {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image {
  width: 100%;
  max-width: 360px;
  height: 260px;
  object-fit: cover;
  border-radius: 20px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.14);
  border: 1px solid var(--line);
}

@media (max-width: 860px) {
  .hero-layout {
    grid-template-columns: 1fr;
  }

  .hero-image {
    max-width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
  }
}

.post-content img {
  max-width: 520px;
  width: 100%;
  height: auto;
  display: block;
  margin: 24px auto;
  border-radius: 16px;
}

.post-content img {
  max-width: 520px;
  width: 100%;
  height: auto;
  display: block;
  margin: 24px auto;
  border-radius: 16px;
}

.post-content img {
  max-width: 520px;
  width: 100%;
  height: auto;
  display: block;
  margin: 24px auto;
  border-radius: 16px;
}

.post-content img {
  max-width: 520px;
  width: 100%;
  height: auto;
  display: block;
  margin: 24px auto;
  border-radius: 16px;
}

.post-content img {
  max-width: 520px;
  width: 100%;
  height: auto;
  display: block;
  margin: 24px auto;
  border-radius: 16px;
}