/* ============================================================
   Lin7an的小站 个人知识站 - 全局样式（蓝色科技风）
   ============================================================ */
:root {
  --bg: #070c18;
  --bg-2: #0b1430;
  --panel: rgba(15, 27, 58, 0.65);
  --panel-solid: #101b3a;
  --border: rgba(64, 156, 255, 0.22);
  --border-strong: rgba(64, 156, 255, 0.45);
  --primary: #2f80ff;
  --primary-bright: #4da3ff;
  --cyan: #00e5ff;
  --text: #dce8ff;
  --text-dim: #8aa3cc;
  --gradient: linear-gradient(135deg, #00c6ff 0%, #2f80ff 55%, #7b5cff 100%);
  --radius: 14px;
  --shadow: 0 8px 32px rgba(0, 60, 160, 0.25);
  --mono: "JetBrains Mono", "SF Mono", Consolas, "Courier New", monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "HarmonyOS Sans", "Microsoft YaHei", -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ---------- 背景动效：网格 + 光斑 ---------- */
.bg-fx { position: fixed; inset: 0; z-index: -1; overflow: hidden; background:
  radial-gradient(ellipse 80% 50% at 50% -10%, rgba(47, 128, 255, 0.18), transparent 60%),
  var(--bg);
}
.bg-grid {
  position: absolute; inset: -1px;
  background-image:
    linear-gradient(rgba(64, 156, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(64, 156, 255, 0.07) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, #000 40%, transparent 100%);
}
.orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.5; animation: float 14s ease-in-out infinite; }
.orb-1 { width: 420px; height: 420px; background: #1146c9; top: -120px; left: -100px; }
.orb-2 { width: 360px; height: 360px; background: #0055d4; bottom: -140px; right: -80px; animation-delay: -7s; }
.orb-3 { width: 240px; height: 240px; background: #0090d4; top: 40%; left: 60%; opacity: 0.25; animation-delay: -3s; }
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, -30px) scale(1.08); }
}

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  background: rgba(7, 12, 24, 0.72);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1180px; margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center; gap: 32px;
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; letter-spacing: 0.5px; text-decoration: none; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 9px; background: var(--gradient);
  display: grid; place-items: center; color: #fff; font-family: var(--mono); font-size: 15px; font-weight: 700;
  box-shadow: 0 0 18px rgba(47, 128, 255, 0.55);
}
.logo-text { background: linear-gradient(90deg, #fff, #7fc0ff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.nav-links { display: flex; gap: 6px; margin-left: auto; }
.nav-links a {
  color: var(--text-dim); text-decoration: none; font-size: 14.5px; padding: 7px 14px;
  border-radius: 8px; transition: all 0.2s;
}
.nav-links a:hover { color: #fff; background: rgba(47, 128, 255, 0.12); }
.nav-links a.active { color: #fff; background: rgba(47, 128, 255, 0.22); box-shadow: inset 0 0 0 1px var(--border-strong); }
.nav-toggle { display: none; background: none; border: none; color: var(--text); font-size: 22px; cursor: pointer; margin-left: auto; }

/* ---------- 通用布局 ---------- */
.container { max-width: 1180px; margin: 0 auto; padding: 48px 24px; }
.section-title { display: flex; align-items: baseline; gap: 14px; margin-bottom: 28px; }
.section-title h2 { font-size: 26px; letter-spacing: 1px; }
.section-title h2::before { content: "//"; color: var(--primary); font-family: var(--mono); margin-right: 8px; font-size: 20px; }
.section-title span { color: var(--text-dim); font-size: 13px; font-family: var(--mono); }

.btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  padding: 11px 26px; border-radius: 10px; font-size: 15px; text-decoration: none;
  border: 1px solid var(--border-strong); color: var(--text); background: rgba(47, 128, 255, 0.1);
  transition: all 0.2s;
}
.btn:hover { background: rgba(47, 128, 255, 0.25); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(47, 128, 255, 0.35); }
.btn-primary { background: var(--gradient); border: none; color: #fff; font-weight: 600; }
.btn-primary:hover { filter: brightness(1.12); box-shadow: 0 8px 28px rgba(47, 128, 255, 0.5); }

/* ---------- Hero ---------- */
.hero { text-align: center; padding: 96px 24px 72px; position: relative; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 13px; color: var(--cyan);
  border: 1px solid rgba(0, 229, 255, 0.35); background: rgba(0, 229, 255, 0.06);
  padding: 6px 16px; border-radius: 999px; margin-bottom: 26px;
}
.hero-tag::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); animation: blink 1.6s infinite; }
@keyframes blink { 50% { opacity: 0.3; } }
.hero h1 {
  font-size: clamp(44px, 8vw, 84px); font-weight: 800; letter-spacing: 2px; line-height: 1.15;
  background: linear-gradient(120deg, #ffffff 20%, #6fb6ff 50%, #00e5ff 80%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  text-shadow: 0 0 60px rgba(47, 128, 255, 0.35);
}
.hero h1 .cursor { display: inline-block; width: 4px; background: var(--cyan); margin-left: 8px; animation: blink 1s step-end infinite; }
.hero p { max-width: 620px; margin: 22px auto 36px; color: var(--text-dim); font-size: 17px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.hero-stats { display: flex; justify-content: center; gap: 56px; margin-top: 64px; flex-wrap: wrap; }
.stat { text-align: center; }
.stat b { display: block; font-size: 34px; font-family: var(--mono); color: var(--primary-bright); text-shadow: 0 0 20px rgba(77, 163, 255, 0.5); }
.stat span { font-size: 13px; color: var(--text-dim); }

/* ---------- 卡片 ---------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 22px; }
.card {
  position: relative; padding: 26px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--border);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
  overflow: hidden; text-decoration: none; color: inherit; display: block;
}
.card::before {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity 0.3s;
  background: radial-gradient(360px 140px at var(--mx, 50%) var(--my, 0%), rgba(47, 128, 255, 0.15), transparent 70%);
}
.card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.card:hover::before { opacity: 1; }
.card-icon {
  width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center;
  font-size: 24px; margin-bottom: 16px; background: rgba(47, 128, 255, 0.12);
  border: 1px solid var(--border);
}
.card h3 { font-size: 17px; margin-bottom: 8px; }
.card p { font-size: 13.5px; color: var(--text-dim); }
.card .card-meta { margin-top: 16px; display: flex; gap: 10px; flex-wrap: wrap; }
.chip {
  font-family: var(--mono); font-size: 11.5px; color: var(--cyan);
  background: rgba(0, 229, 255, 0.07); border: 1px solid rgba(0, 229, 255, 0.22);
  padding: 2px 10px; border-radius: 999px;
}
.card .arrow { position: absolute; right: 20px; top: 22px; color: var(--text-dim); transition: all 0.25s; font-family: var(--mono); }
.card:hover .arrow { color: var(--cyan); transform: translateX(4px); }

/* ---------- 工具入口 ---------- */
.tool-card { display: flex; align-items: center; gap: 18px; }
.tool-card .card-icon { margin-bottom: 0; flex-shrink: 0; }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--border); margin-top: 60px; padding: 34px 24px; text-align: center; color: var(--text-dim); font-size: 13.5px; }
.footer .logo-mark { margin: 0 auto 12px; }
.footer a { color: var(--primary-bright); text-decoration: none; }
.beian { margin-top: 14px; display: flex; justify-content: center; align-items: center; gap: 8px; flex-wrap: wrap; font-size: 12.5px; }
.beian a { color: var(--text-dim); transition: color 0.2s; display: inline-flex; align-items: center; gap: 4px; }
.beian a:hover { color: var(--primary-bright); }
.beian-sep { color: var(--text-dim); opacity: 0.5; }
.beian-badge { color: var(--text-dim); flex-shrink: 0; }

/* ---------- 笔记页 ---------- */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 30px; }
.filter-btn {
  cursor: pointer; border: 1px solid var(--border); background: var(--panel); color: var(--text-dim);
  padding: 8px 20px; border-radius: 999px; font-size: 14px; transition: all 0.2s;
}
.filter-btn:hover { color: #fff; border-color: var(--border-strong); }
.filter-btn.active { background: var(--gradient); border: none; color: #fff; font-weight: 600; box-shadow: 0 4px 16px rgba(47, 128, 255, 0.4); }
.note-card { cursor: pointer; }
.note-card .date { font-family: var(--mono); font-size: 12px; color: var(--text-dim); position: absolute; right: 20px; bottom: 18px; }
.empty-tip { text-align: center; color: var(--text-dim); padding: 60px 0; font-family: var(--mono); }

/* ---------- 工具页 ---------- */
.tool-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 900px) { .tool-layout { grid-template-columns: 1fr; } }
.tool-pane {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  display: flex; flex-direction: column; overflow: hidden; min-height: 460px;
}
.pane-head {
  display: flex; align-items: center; gap: 8px; padding: 10px 16px;
  border-bottom: 1px solid var(--border); background: rgba(7, 12, 24, 0.5);
  font-family: var(--mono); font-size: 12.5px; color: var(--text-dim); flex-wrap: wrap;
}
.pane-head .dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-r { background: #ff5f57; } .dot-y { background: #febc2e; } .dot-g { background: #28c840; }
.pane-title { margin-left: 8px; }
.pane-actions { margin-left: auto; display: flex; gap: 8px; flex-wrap: wrap; }
.mini-btn {
  cursor: pointer; border: 1px solid var(--border); background: rgba(47, 128, 255, 0.08);
  color: var(--text); font-size: 12.5px; padding: 5px 12px; border-radius: 7px; transition: all 0.15s;
}
.mini-btn:hover { background: rgba(47, 128, 255, 0.25); border-color: var(--border-strong); }
.mini-btn.accent { background: var(--gradient); border: none; color: #fff; font-weight: 600; }
.pane-body { flex: 1; display: flex; flex-direction: column; }
textarea.json-io {
  flex: 1; min-height: 380px; resize: vertical; border: none; outline: none;
  background: transparent; color: #cfe3ff; font-family: var(--mono); font-size: 13.5px;
  padding: 16px; line-height: 1.6; tab-size: 2;
}
.status-bar { padding: 9px 16px; font-family: var(--mono); font-size: 12.5px; border-top: 1px solid var(--border); }
.status-ok { color: #3ddc84; } .status-err { color: #ff6b6b; } .status-info { color: var(--text-dim); }

/* JSON 树视图 */
.tree-view { flex: 1; overflow: auto; padding: 14px 16px; font-family: var(--mono); font-size: 13px; min-height: 380px; }
.tree-view ul { list-style: none; padding-left: 22px; }
.tree-view > ul { padding-left: 0; }
.tree-item { position: relative; }
.t-toggle {
  cursor: pointer; user-select: none; color: var(--primary-bright); margin-right: 4px;
  display: inline-block; width: 14px; font-size: 10px;
}
.t-toggle:hover { color: var(--cyan); }
.t-key { color: #7fc0ff; } .t-str { color: #3ddc84; } .t-num { color: #febc6e; }
.t-bool { color: #c792ea; } .t-null { color: #8aa3cc; } .t-brace { color: var(--text-dim); }
.t-count { color: var(--text-dim); font-size: 11px; margin-left: 6px; }

/* ---------- 关于页 ---------- */
.about-grid { display: grid; grid-template-columns: 300px 1fr; gap: 26px; align-items: start; }
@media (max-width: 820px) { .about-grid { grid-template-columns: 1fr; } }
.avatar-box {
  text-align: center; padding: 36px 24px; border-radius: var(--radius);
  background: var(--panel); border: 1px solid var(--border);
}
.avatar {
  width: 110px; height: 110px; margin: 0 auto 18px; border-radius: 50%;
  background: var(--gradient); display: grid; place-items: center;
  font-size: 40px; font-weight: 800; color: #fff; font-family: var(--mono);
  box-shadow: 0 0 40px rgba(47, 128, 255, 0.5);
}
.skill-tag { display: inline-block; margin: 4px; }

/* ---------- 搜索框 ---------- */
.search-row { margin-bottom: 18px; }
.search-box {
  width: 100%; max-width: 520px; padding: 12px 18px; font-size: 15px;
  color: var(--text); border-radius: 10px; outline: none;
  background: var(--panel); border: 1px solid var(--border); transition: border-color 0.2s, box-shadow 0.2s;
}
.search-box:focus { border-color: var(--border-strong); box-shadow: 0 0 0 3px rgba(47, 128, 255, 0.15); }
.search-box::placeholder { color: var(--text-dim); }

/* ---------- 笔记详情页 ---------- */
.note-article { padding: 40px; }
@media (max-width: 640px) { .note-article { padding: 24px; } }
.note-head { border-bottom: 1px solid var(--border); padding-bottom: 22px; margin-bottom: 28px; }
.note-title { font-size: clamp(24px, 4vw, 34px); line-height: 1.35; margin: 14px 0 16px; }
.note-meta { display: flex; gap: 22px; flex-wrap: wrap; color: var(--text-dim); font-size: 13px; font-family: var(--mono); }
.pager { display: flex; justify-content: space-between; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.pager .btn { font-size: 13.5px; padding: 9px 18px; max-width: 100%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- Markdown 正文排版 ---------- */
.md h3.md-h { font-size: 21px; margin: 34px 0 14px; padding-left: 12px; border-left: 3px solid var(--primary); }
.md h4.md-h { font-size: 17px; margin: 26px 0 10px; color: var(--primary-bright); }
.md p { color: var(--text-dim); margin: 12px 0; }
.md strong { color: #fff; }
.md a { color: var(--cyan); }
.md-code { font-family: var(--mono); font-size: 0.9em; background: rgba(0, 229, 255, 0.08); border: 1px solid rgba(0, 229, 255, 0.2); border-radius: 5px; padding: 1px 6px; color: var(--cyan); }
.md-list { margin: 14px 0 14px 22px; color: var(--text-dim); }
.md-list li { margin: 6px 0; }
.md-hr { border: none; border-top: 1px solid var(--border); margin: 26px 0; }
.md-quote { border-left: 3px solid var(--cyan); background: rgba(0, 229, 255, 0.05); padding: 12px 18px; border-radius: 0 10px 10px 0; margin: 18px 0; }
.md-quote p { margin: 4px 0; }
.md-codeblock { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; margin: 18px 0; background: #0a1020; }
.md-codeblock .md-code-lang {
  font-family: var(--mono); font-size: 11.5px; color: var(--text-dim);
  padding: 7px 16px; border-bottom: 1px solid var(--border); background: rgba(47, 128, 255, 0.06);
}
.md-codeblock pre { padding: 16px; overflow-x: auto; }
.md-codeblock code { font-family: var(--mono); font-size: 13px; color: #cfe3ff; line-height: 1.65; }
.md-table { overflow-x: auto; margin: 18px 0; border-radius: 10px; border: 1px solid var(--border); }
.md-table table { width: 100%; border-collapse: collapse; }
.md-table th, .md-table td { padding: 10px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.md-table th { background: rgba(47, 128, 255, 0.1); color: #fff; }
.md-table td { color: var(--text-dim); }
.md-table tr:last-child td { border-bottom: none; }

/* ---------- 工具页通用小组件 ---------- */
.field-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; margin-bottom: 16px; }
.field-row label { font-size: 14px; color: var(--text-dim); }
input.tool-input, select.tool-input {
  padding: 10px 14px; font-size: 15px; color: var(--text); border-radius: 9px; outline: none;
  background: var(--panel); border: 1px solid var(--border); font-family: var(--mono);
}
input.tool-input:focus { border-color: var(--border-strong); }
.result-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin: 16px 0; }
.result-cell { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 16px 18px; }
.result-cell .rc-label { font-size: 12px; color: var(--text-dim); font-family: var(--mono); margin-bottom: 6px; }
.result-cell .rc-value { font-family: var(--mono); font-size: 16px; color: var(--primary-bright); word-break: break-all; }
.result-cell .rc-value.big { font-size: 24px; color: var(--cyan); text-shadow: 0 0 18px rgba(0, 229, 255, 0.4); }

/* ---------- Diff 工具 ---------- */
.diff-pane { min-height: 380px; }
.diff-view { flex: 1; overflow: auto; min-height: 380px; font-family: var(--mono); font-size: 13px; }
.diff-table { width: 100%; border-collapse: collapse; }
.diff-table td { padding: 2px 10px; white-space: pre-wrap; word-break: break-all; vertical-align: top; }
.d-ln { width: 1%; min-width: 42px; text-align: right; color: #5b729d; user-select: none; border-right: 1px solid var(--border); background: rgba(47, 128, 255, 0.03); }
.d-del { background: rgba(255, 107, 107, 0.12); color: #ffb3b3; }
.d-add { background: rgba(61, 220, 132, 0.10); color: #a9f0c8; }
.d-sign { width: 1%; color: var(--text-dim); }

/* ---------- 响应式 ---------- */
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; padding: 14px 24px 20px; gap: 4px;
    background: rgba(7, 12, 24, 0.96); border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .hero-stats { gap: 30px; }
}