/* ===== 深色科技风 · 文章页样式 ===== */
:root {
  --bg-0: #070b14;
  --bg-1: #0c1220;
  --card: rgba(255, 255, 255, 0.04);
  --card-border: rgba(255, 255, 255, 0.08);
  --text-1: #e8ecf5;
  --text-2: #9aa4bd;
  --text-3: #6b7490;
  --accent-1: #38bdf8;
  --accent-2: #818cf8;
  --accent-3: #c084fc;
  --success: #34d399;
  --warn: #fbbf24;
  --code-bg: rgba(0, 0, 0, 0.35);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-0);
  color: var(--text-1);
  min-height: 100vh;
  line-height: 1.75;
  overflow-x: hidden;
}

/* 背景光效 */
.bg-orbs { position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.4; animation: float 18s ease-in-out infinite; }
.orb.a { width: 420px; height: 420px; background: #1e40af; top: -100px; left: -80px; }
.orb.b { width: 480px; height: 480px; background: #7c3aed; top: 40%; right: -140px; animation-delay: -6s; }
.orb.c { width: 380px; height: 380px; background: #0891b2; bottom: -100px; left: 25%; animation-delay: -12s; }
@keyframes float { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(30px,-30px) scale(1.08); } }

.grid-bg {
  position: fixed; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  pointer-events: none;
}

/* 顶栏 */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 28px;
  background: rgba(7, 11, 20, 0.7);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--card-border);
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; letter-spacing: 0.5px; }
.logo {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  display: grid; place-items: center;
  box-shadow: 0 6px 20px -4px rgba(56,189,248,0.5);
}
.logo svg { width: 18px; height: 18px; color: #06121f; }
.brand small { color: var(--text-3); font-weight: 500; margin-left: 4px; font-size: 12px; letter-spacing: 1px; }
.back-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 16px; border-radius: 8px;
  background: var(--card); border: 1px solid var(--card-border);
  color: var(--text-2); text-decoration: none; font-size: 13px; font-weight: 600;
  transition: all 0.2s ease;
}
.back-btn:hover { color: var(--accent-1); border-color: rgba(56,189,248,0.4); }

/* 文章容器 */
.wrap {
  position: relative; z-index: 1;
  max-width: 860px; margin: 0 auto;
  padding: 48px 28px 100px;
}

.article-meta {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 14px;
  font-size: 12px; color: var(--text-3);
  letter-spacing: 1px; text-transform: uppercase;
}
.article-meta .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent-1); }

.article-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800; letter-spacing: -0.5px; line-height: 1.2;
  background: linear-gradient(120deg, #fff 0%, #cbd5e1 60%, var(--accent-1) 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}
.article-subtitle { color: var(--text-2); font-size: 15px; margin-bottom: 40px; }

.divider { height: 1px; background: linear-gradient(90deg, transparent, var(--card-border), transparent); margin: 32px 0; }

/* Markdown 渲染样式 */
.prose { color: var(--text-1); font-size: 15.5px; }
.prose > * + * { margin-top: 1em; }

.prose h1 { font-size: 28px; font-weight: 800; margin: 1.8em 0 0.8em; letter-spacing: -0.3px; }
.prose h2 {
  font-size: 22px; font-weight: 700; margin: 1.8em 0 0.7em;
  padding-left: 12px; border-left: 3px solid var(--accent-1);
  line-height: 1.4;
}
.prose h3 { font-size: 18px; font-weight: 700; margin: 1.5em 0 0.6em; color: var(--text-1); }
.prose h4 { font-size: 16px; font-weight: 600; margin: 1.2em 0 0.5em; color: var(--accent-2); }

.prose p { color: var(--text-2); line-height: 1.8; }

.prose strong { color: var(--text-1); font-weight: 600; }
.prose em { color: var(--accent-3); font-style: normal; }

.prose a {
  color: var(--accent-1); text-decoration: none;
  border-bottom: 1px solid rgba(56,189,248,0.3);
  transition: all 0.2s ease;
}
.prose a:hover { color: var(--accent-2); border-bottom-color: var(--accent-2); }

.prose ul, .prose ol { padding-left: 1.6em; color: var(--text-2); }
.prose li { margin: 0.4em 0; line-height: 1.7; }
.prose ul li::marker { color: var(--accent-1); }
.prose ol li::marker { color: var(--accent-2); font-weight: 600; }

/* 内联代码 */
.prose code:not(pre code) {
  font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
  font-size: 0.88em;
  padding: 2px 7px;
  background: rgba(56,189,248,0.1);
  border: 1px solid rgba(56,189,248,0.2);
  border-radius: 5px;
  color: #7dd3fc;
}

/* 代码块 */
.prose pre {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 18px 20px;
  overflow-x: auto;
  margin: 1.2em 0;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}
.prose pre::before {
  content: "";
  position: absolute; top: 12px; left: 12px;
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,0.15);
  box-shadow: 16px 0 0 rgba(255,255,255,0.15), 32px 0 0 rgba(255,255,255,0.15);
}
.prose pre code {
  font-family: "JetBrains Mono", "Fira Code", Consolas, monospace;
  font-size: 13.5px; line-height: 1.7;
  color: #cbd5e1;
  display: block; margin-top: 8px;
  white-space: pre;
}
.prose pre code .tok-key { color: #c084fc; }
.prose pre code .tok-str { color: #86efac; }
.prose pre code .tok-num { color: #fbbf24; }
.prose pre code .tok-com { color: #64748b; font-style: italic; }

/* 表格 */
.prose table {
  width: 100%; border-collapse: collapse;
  margin: 1.4em 0; font-size: 14px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px; overflow: hidden;
}
.prose th {
  background: rgba(56,189,248,0.08);
  color: var(--accent-1); font-weight: 600;
  text-align: left; padding: 12px 16px;
  border-bottom: 1px solid var(--card-border);
}
.prose td { padding: 11px 16px; border-bottom: 1px solid rgba(255,255,255,0.04); color: var(--text-2); }
.prose tr:last-child td { border-bottom: none; }
.prose tr:hover td { background: rgba(255,255,255,0.02); }

/* 引用 / 提示块 */
.prose blockquote {
  border-left: 3px solid var(--accent-3);
  background: rgba(192,132,252,0.06);
  padding: 12px 18px;
  border-radius: 0 10px 10px 0;
  color: var(--text-2);
  margin: 1.2em 0;
}

/* 加载状态 */
.loading {
  text-align: center; padding: 80px 20px;
  color: var(--text-3);
}
.spinner {
  width: 36px; height: 36px; margin: 0 auto 16px;
  border: 3px solid var(--card-border);
  border-top-color: var(--accent-1);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.error-state {
  text-align: center; padding: 80px 20px; color: var(--text-3);
}
.error-state a { color: var(--accent-1); }

/* 代码块的语言标签 */
.code-block-wrapper { position: relative; margin: 1.2em 0; }
.code-lang {
  position: absolute; top: 10px; right: 14px;
  font-size: 11px; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.5px;
  font-family: "JetBrains Mono", monospace;
  z-index: 2;
}

/* 复制按钮 */
.copy-btn {
  position: absolute; top: 10px; right: 54px; z-index: 2;
  padding: 3px 10px; border-radius: 6px;
  background: rgba(255,255,255,0.06); border: 1px solid var(--card-border);
  color: var(--text-3); font-size: 11px; cursor: pointer;
  transition: all 0.2s ease;
}
.copy-btn:hover { color: var(--accent-1); border-color: rgba(56,189,248,0.4); }
.copy-btn.copied { color: var(--success); border-color: rgba(52,211,153,0.4); }

@media (max-width: 640px) {
  .wrap { padding: 32px 18px 80px; }
  .topbar { padding: 12px 18px; }
  .prose { font-size: 14.5px; }
  .prose pre { padding: 14px; }
}