:root {
  --bg: #fffaf5;
  --surface: #ffffff;
  --ink: #1f2430;
  --muted: #6b7280;
  --line: #efe6dc;
  --primary: #ff6b35;
  --primary-dark: #e2521c;
  --secondary: #1a936f;
  --accent: #ffd23f;
  --shadow: 0 10px 30px rgba(255, 107, 53, 0.10);
  --radius: 16px;
  --maxw: 960px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 250, 245, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 19px;
  color: var(--ink);
  text-decoration: none;
}
.brand-logo { font-size: 24px; }
.brand-name { letter-spacing: 0.5px; }
.nav-links { display: flex; gap: 22px; }
.nav-links a {
  color: var(--muted);
  font-weight: 600;
  text-decoration: none;
  padding: 6px 2px;
  position: relative;
}
.nav-links a.active,
.nav-links a:hover { color: var(--primary-dark); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
}

/* ---------- Hero ---------- */
.hero {
  margin: 36px 0 30px;
  padding: 40px 36px;
  border-radius: 22px;
  background: linear-gradient(135deg, #ff6b35 0%, #ff9558 55%, #ffd23f 100%);
  color: #fff;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "🏀";
  position: absolute;
  right: 18px; bottom: -10px;
  font-size: 120px;
  opacity: 0.18;
}
.hero h1 { margin: 0 0 10px; font-size: 32px; }
.hero p { margin: 0; font-size: 16px; max-width: 560px; opacity: 0.95; }

/* ---------- Section ---------- */
.section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin: 30px 0 16px;
}
.section-title h2 { font-size: 22px; margin: 0; }
.section-title .count { color: var(--muted); font-size: 14px; }

/* ---------- Tag chips ---------- */
.tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 10px 0 24px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}
.chip:hover { border-color: var(--primary); color: var(--primary-dark); }
.chip.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.chip .num { font-size: 12px; opacity: 0.7; }

/* ---------- Article grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: #ffd9c7;
}
.card .emoji { font-size: 34px; }
.card h3 { margin: 0; font-size: 19px; }
.card .excerpt { color: var(--muted); font-size: 14px; margin: 0; flex: 1; }
.card .meta { font-size: 13px; color: var(--muted); display: flex; gap: 10px; flex-wrap: wrap; }
.card .meta .tag { color: var(--primary-dark); }

/* ---------- Post detail ---------- */
.back-link { display: inline-block; margin: 24px 0 8px; font-weight: 600; }
.post-header { margin: 8px 0 24px; }
.post-header h1 { font-size: 30px; margin: 8px 0; }
.post-header .meta { color: var(--muted); font-size: 14px; display: flex; gap: 12px; flex-wrap: wrap; }
.post-body {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 34px;
}
.post-body h1, .post-body h2, .post-body h3 { line-height: 1.4; margin-top: 1.4em; }
.post-body h2 { border-left: 4px solid var(--primary); padding-left: 12px; }
.post-body img { max-width: 100%; border-radius: 12px; }
.post-body blockquote {
  margin: 1em 0;
  padding: 10px 18px;
  border-left: 4px solid var(--secondary);
  background: #f1faf6;
  border-radius: 0 10px 10px 0;
  color: #2c5a4b;
}
.post-body code {
  background: #f5efe8;
  padding: 2px 6px;
  border-radius: 6px;
  font-size: 0.9em;
}
.post-body pre {
  background: #1f2430;
  color: #f6f7f9;
  padding: 16px;
  border-radius: 12px;
  overflow-x: auto;
}
.post-body pre code { background: none; padding: 0; color: inherit; }
.post-body table { border-collapse: collapse; width: 100%; margin: 1em 0; }
.post-body th, .post-body td { border: 1px solid var(--line); padding: 8px 12px; }
.post-body ul li { margin: 4px 0; }

/* ---------- About ---------- */
.about {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px;
  margin-top: 24px;
}
.about .avatar { font-size: 64px; }
.about h1 { margin: 8px 0 4px; }
.about .role { color: var(--primary-dark); font-weight: 700; margin-bottom: 16px; }
.about .facts { display: flex; flex-wrap: wrap; gap: 12px; margin: 18px 0; }
.about .fact {
  background: #fff5ee;
  border: 1px solid #ffd9c7;
  border-radius: 12px;
  padding: 10px 16px;
  font-size: 14px;
}
.about .fact b { color: var(--primary-dark); }

/* ---------- Empty / not found ---------- */
.empty { text-align: center; padding: 60px 20px; color: var(--muted); }

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 60px;
  border-top: 1px solid var(--line);
  padding: 26px 0;
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}
.site-footer .muted { opacity: 0.8; font-size: 13px; }

@media (max-width: 600px) {
  .container { padding: 0 14px; }
  .site-header .nav { height: 56px; }
  .brand-name { font-size: 16px; }
  .nav-links { gap: 16px; }
  .nav-links a { font-size: 15px; }
  .hero { padding: 26px 20px; margin: 24px 0; }
  .hero h1 { font-size: 25px; }
  .hero p { font-size: 15px; }
  .section-title { flex-direction: column; align-items: flex-start; gap: 4px; }
  .grid { grid-template-columns: 1fr; }
  .post-body { padding: 20px 18px; }
  .post-body pre { font-size: 13px; }
  .about { padding: 22px 18px; }
}
@media (max-width: 380px) {
  .hero h1 { font-size: 22px; }
  .card h3 { font-size: 18px; }
}