/* ============================================================
   Muyu 的技术小站 — 暗色玻璃拟态开发者博客主题
   与「陪写星人」应用的品牌调性（深空学习舱）保持一致
   ============================================================ */

:root {
  --bg: #0a0f1c;
  --bg-soft: #0e1526;
  --card: rgba(148, 163, 184, 0.055);
  --card-hover: rgba(148, 163, 184, 0.095);
  --border: rgba(148, 163, 184, 0.14);
  --border-hover: rgba(56, 189, 248, 0.35);
  --text: #e6ecf5;
  --muted: #98a5b8;
  --faint: #5d6b80;
  --cyan: #22d3ee;
  --blue: #60a5fa;
  --violet: #a78bfa;
  --grad: linear-gradient(120deg, #22d3ee 0%, #60a5fa 45%, #a78bfa 100%);
  --code-bg: #0b1322;
  --radius: 16px;
  --shadow: 0 16px 40px -18px rgba(0, 0, 0, 0.65);
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Consolas, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---- 背景：点阵 + 双侧光晕 ---- */
.backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 55% 40% at 12% -5%, rgba(34, 211, 238, 0.13), transparent 65%),
    radial-gradient(ellipse 50% 45% at 95% 8%, rgba(167, 139, 250, 0.11), transparent 65%),
    radial-gradient(ellipse 60% 50% at 50% 115%, rgba(96, 165, 250, 0.09), transparent 70%),
    var(--bg);
}
.backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(148, 163, 184, 0.13) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.55), rgba(0,0,0,0.12) 45%, transparent 75%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,0.55), rgba(0,0,0,0.12) 45%, transparent 75%);
}

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--cyan); text-decoration: none; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 800px; margin: 0 auto; padding: 0 24px; }

/* ---- 顶部导航：玻璃条 ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(10, 15, 28, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 17px; color: var(--text); letter-spacing: 0.3px; }
.brand:hover { color: var(--text); }
.brand-logo { width: 27px; height: 27px; filter: drop-shadow(0 0 8px rgba(34, 211, 238, 0.45)); }
.brand .grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-links { display: flex; gap: 30px; }
.nav-links a { color: var(--muted); font-size: 14.5px; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--cyan); }
.nav-links a .nav-num { font-family: var(--mono); font-size: 11px; color: var(--faint); margin-right: 5px; }

/* ---- 通用标签 ---- */
.tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 12.5px;
  font-family: var(--mono);
  transition: border-color 0.2s, color 0.2s;
}
.tag:hover { border-color: var(--border-hover); color: var(--text); }

/* ---- Hero ---- */
.hero { padding: 84px 0 60px; position: relative; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 48px;
  align-items: center;
}
.hero .hello {
  font-family: var(--mono);
  color: var(--cyan);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
}
.hero .hello::before { content: "~/ "; color: var(--faint); }
.hero h1 {
  font-size: clamp(32px, 5vw, 50px);
  line-height: 1.22;
  margin: 14px 0 18px;
  letter-spacing: -0.5px;
  font-weight: 800;
}
.hero h1 .grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead { color: var(--muted); font-size: 16.5px; max-width: 560px; margin: 0; }
.hero .meta-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }

/* 终端装饰卡 */
.terminal {
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(17, 25, 43, 0.92), rgba(11, 18, 33, 0.92));
  box-shadow: var(--shadow);
  overflow: hidden;
  transform: rotate(1.2deg);
  transition: transform 0.35s ease;
}
.terminal:hover { transform: rotate(0deg) translateY(-4px); }
.term-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(148, 163, 184, 0.05);
}
.term-dot { width: 11px; height: 11px; border-radius: 50%; }
.term-dot.r { background: #f87171; } .term-dot.y { background: #fbbf24; } .term-dot.g { background: #34d399; }
.term-title { margin-left: 8px; font-family: var(--mono); font-size: 12px; color: var(--faint); }
.term-body { padding: 18px 20px 22px; font-family: var(--mono); font-size: 13.5px; line-height: 2; }
.term-body .p { color: var(--cyan); }
.term-body .cmd { color: var(--text); }
.term-body .out { color: var(--faint); }
.term-body .hl { color: var(--violet); }
.cursor {
  display: inline-block;
  width: 8px; height: 16px;
  background: var(--cyan);
  vertical-align: -2px;
  animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ---- 区块 ---- */
section.block { padding: 56px 0 10px; }
.sec-head { margin-bottom: 26px; display: flex; align-items: baseline; gap: 18px; flex-wrap: wrap; }
.sec-head .kicker {
  font-family: var(--mono);
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
}
.sec-head h2 { margin: 0; font-size: 28px; letter-spacing: -0.3px; font-weight: 800; }
.sec-head .sec-line { flex: 1; height: 1px; background: linear-gradient(to right, var(--border), transparent); min-width: 60px; }

/* ---- 文章列表 ---- */
.post-list { display: flex; flex-direction: column; gap: 16px; }
.post-item {
  position: relative;
  display: grid;
  grid-template-columns: 74px 1fr 40px;
  gap: 20px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 26px;
  color: var(--text);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
  overflow: hidden;
}
.post-item::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--grad);
  opacity: 0;
  transition: opacity 0.25s;
}
.post-item:hover {
  text-decoration: none;
  transform: translateY(-3px);
  background: var(--card-hover);
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
}
.post-item:hover::before { opacity: 1; }
.post-no {
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(148, 163, 184, 0.4);
  transition: -webkit-text-stroke-color 0.25s;
}
.post-item:hover .post-no { -webkit-text-stroke-color: var(--cyan); }
.post-item h3 { margin: 2px 0 8px; font-size: 19px; line-height: 1.45; }
.post-item p { margin: 0; color: var(--muted); font-size: 14.5px; line-height: 1.7; }
.post-meta { color: var(--faint); font-size: 12.5px; font-family: var(--mono); margin-bottom: 6px; display: flex; gap: 14px; flex-wrap: wrap; }
.post-arrow {
  font-size: 20px;
  color: var(--faint);
  transition: color 0.25s, transform 0.25s;
}
.post-item:hover .post-arrow { color: var(--cyan); transform: translateX(5px); }

/* ---- 项目展示 ---- */
.proj {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 34px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
}
.proj-top { display: flex; align-items: flex-start; gap: 20px; flex-wrap: wrap; }
.proj-logo {
  width: 58px; height: 58px;
  border-radius: 16px;
  flex-shrink: 0;
  filter: drop-shadow(0 0 14px rgba(34, 211, 238, 0.35));
}
.proj h3 { margin: 2px 0 12px; font-size: 23px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.proj-badge {
  font-size: 11.5px;
  font-family: var(--mono);
  font-weight: 600;
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.35);
  background: rgba(34, 211, 238, 0.08);
  border-radius: 999px;
  padding: 2px 11px;
}
.proj p { color: var(--muted); font-size: 15px; margin: 0 0 8px; }
.proj .stack-row { display: flex; flex-wrap: wrap; gap: 9px; margin: 18px 0 4px; }

.shot-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 26px; }
.shot-row figure {
  margin: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.shot-row figure:hover {
  transform: translateY(-5px) scale(1.015);
  border-color: var(--border-hover);
  box-shadow: 0 20px 45px -18px rgba(34, 211, 248, 0.28);
}
.shot-row img { width: 100%; display: block; }
.shot-row figcaption {
  padding: 10px 14px;
  color: var(--faint);
  font-size: 12.5px;
  font-family: var(--mono);
  border-top: 1px solid var(--border);
}

/* ---- 关于 ---- */
.about-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  color: var(--muted);
  font-size: 15.5px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.about-card .sig {
  display: block;
  margin-top: 14px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--faint);
}
.about-card .sig b { color: var(--cyan); font-weight: 600; }

/* ---- 文章页 ---- */
.article { padding: 56px 0 24px; }
.back-home {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 14px;
  font-family: var(--mono);
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--card);
  transition: color 0.2s, border-color 0.2s;
}
.back-home:hover { color: var(--cyan); border-color: var(--border-hover); }
.article-head {
  padding: 30px 34px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  margin-bottom: 36px;
}
.article-head .post-meta { font-size: 13px; margin-bottom: 10px; }
.article h1 { font-size: clamp(25px, 4vw, 33px); line-height: 1.4; margin: 0; font-weight: 800; letter-spacing: -0.3px; }

.article .body { font-size: 16.5px; color: #c8d2e0; }
.article .body h2 {
  font-size: 22px;
  color: var(--text);
  margin: 46px 0 14px;
  padding-left: 14px;
  border-left: 3px solid transparent;
  border-image: var(--grad) 1;
  letter-spacing: -0.2px;
}
.article .body p { margin: 0 0 18px; }
.article .body ul, .article .body ol { padding-left: 24px; margin: 0 0 18px; }
.article .body li { margin-bottom: 8px; }
.article .body li::marker { color: var(--cyan); }
.article .body strong { color: var(--text); }
.article .body code {
  font-family: var(--mono);
  background: rgba(34, 211, 238, 0.09);
  border: 1px solid rgba(34, 211, 238, 0.16);
  color: #7dd3fc;
  border-radius: 7px;
  padding: 1px 8px;
  font-size: 13.5px;
}
.article .body pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 24px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.75;
  box-shadow: var(--shadow);
}
.article .body pre code { background: none; border: none; padding: 0; color: #c9d6e8; font-size: inherit; }
.article .body blockquote {
  margin: 0 0 18px;
  padding: 14px 20px;
  border-left: 3px solid;
  border-image: var(--grad) 1;
  border-radius: 0 12px 12px 0;
  background: var(--card);
  color: var(--muted);
}

/* ---- 底部 ---- */
footer {
  margin-top: 90px;
  border-top: 1px solid var(--border);
  padding: 30px 0 40px;
  color: var(--faint);
  font-size: 13.5px;
}
.foot-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
footer a { color: var(--muted); }
footer a:hover { color: var(--cyan); }

/* ---- 滚动入场 ---- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.55s ease, transform 0.55s ease; }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .cursor { animation: none; }
  .terminal, .shot-row figure, .post-item { transition: none; }
}

/* ---- 响应式 ---- */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .terminal { max-width: 480px; transform: none; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero { padding: 56px 0 40px; }
  section.block { padding: 44px 0 6px; }
  .post-item { grid-template-columns: 1fr; gap: 8px; padding: 20px; }
  .post-no { font-size: 22px; }
  .post-arrow { display: none; }
  .proj { padding: 22px; }
  .shot-row { grid-template-columns: repeat(2, 1fr); }
  .article-head { padding: 22px 20px; }
}