/* ============================================================
   白穆 · 个人博客 全站样式 (深色科技风, 与手势遥控器 App 统一)
   ============================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --cyan: #22D3EE; --cyan-soft: #67E8F9; --orange: #FFCC80; --purple: #A78BFA;
  --bg1: #060A14; --bg2: #0B1226;
  --glass: rgba(34, 211, 238, 0.06); --glass2: rgba(34, 211, 238, 0.1);
  --line: rgba(34, 211, 238, 0.18); --line2: rgba(34, 211, 238, 0.35);
  --text: #E6EEF9; --dim: #8FA3C8; --dim2: #B9C7DE;
}
html { scroll-behavior: smooth; }
::selection { background: rgba(34,211,238,.35); color: #E0F7FF; }
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: #070C18; }
::-webkit-scrollbar-thumb { background: rgba(34,211,238,.25); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: rgba(34,211,238,.45); }
body {
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    linear-gradient(180deg, rgba(6,10,20,.82), rgba(6,10,20,.88)),
    url("/static/bg.jpg") center top / cover no-repeat #060A14;
  background-attachment: fixed, fixed;
  color: var(--text); line-height: 1.75; overflow-x: hidden;
}
a { color: var(--cyan); text-decoration: none; }
img { max-width: 100%; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 820px; margin: 0 auto; padding: 0 24px; }

/* ---------------- 导航 ---------------- */
nav {
  position: sticky; top: 0; z-index: 99;
  background: rgba(6, 10, 20, 0.78); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 62px; gap: 12px; }
.logo { font-weight: 700; font-size: 18px; letter-spacing: 2px; color: var(--text); }
.logo b { color: var(--cyan); }
.logo small { display: block; font-size: 9px; letter-spacing: 5px; color: var(--dim); font-weight: 400; line-height: 1; }
.navlinks { display: flex; gap: 22px; font-size: 14px; }
.navlinks a { color: var(--dim); transition: color .2s; letter-spacing: 1px; }
.navlinks a:hover, .navlinks a.on { color: var(--cyan); }

/* ---------------- 页脚 ---------------- */
footer { border-top: 1px solid var(--line); padding: 34px 0 44px; margin-top: 70px; }
footer .wrap { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; color: var(--dim); font-size: 13px; }
footer a { color: var(--cyan); }
.foot-links { display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------------- 通用组件 ---------------- */
.badge {
  display: inline-block; padding: 4px 16px; border: 1px solid var(--line);
  border-radius: 999px; color: var(--cyan); font-size: 12.5px; letter-spacing: 3px;
  background: var(--glass);
}
.btn {
  display: inline-block; padding: 12px 34px; border-radius: 12px; font-size: 15px;
  letter-spacing: 2px; border: 1px solid var(--line); transition: .2s; cursor: pointer;
  background: transparent; color: var(--cyan); font-family: inherit;
}
.btn-main {
  background: linear-gradient(120deg, #0891B2, #6D28D9); color: #E0F7FF; font-weight: 700;
  box-shadow: 0 0 26px rgba(34, 211, 238, .3);
}
.btn-main:hover { box-shadow: 0 0 40px rgba(34, 211, 238, .55); transform: translateY(-2px); }
.btn-ghost:hover { background: var(--glass); }
.btn-sm { padding: 6px 16px; font-size: 13px; border-radius: 9px; }
.btn-danger { border-color: rgba(248, 113, 113, .4); color: #f87171; }
.btn-danger:hover { background: rgba(248, 113, 113, .1); }

.card {
  border: 1px solid var(--line); border-radius: 18px; padding: 28px 26px;
  background: linear-gradient(160deg, rgba(34,211,238,.07), rgba(167,139,250,.05));
  transition: .25s; display: block;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 14px 44px rgba(34,211,238,.15); border-color: var(--line2); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }

.sec-title { font-size: 28px; letter-spacing: 4px; margin-bottom: 8px; }
.sec-sub { color: var(--dim); font-size: 14px; letter-spacing: 2px; margin-bottom: 40px; }
.sec-sub::before { content: "── "; color: var(--cyan); }
.sec-sub::after { content: " ──"; color: var(--cyan); }
.center { text-align: center; }

.chips { display: flex; gap: 10px; flex-wrap: wrap; }
.chip {
  padding: 4px 14px; border: 1px solid var(--line); border-radius: 999px;
  font-size: 13px; color: var(--dim); background: rgba(255,255,255,.02); transition: .2s;
}
.chip:hover, .chip.on { color: var(--cyan); border-color: var(--line2); background: var(--glass); }

/* ---------------- 页面头 ---------------- */
.pagehead { text-align: center; padding: 64px 0 10px; }
.pagehead h1 { font-size: 38px; letter-spacing: 6px; }
.pagehead h1 .grad {
  background: linear-gradient(100deg, #67E8F9 10%, #A78BFA 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.pagehead .sub { color: var(--dim); margin-top: 10px; font-size: 15px; letter-spacing: 2px; }

/* ---------------- 文章卡片 ---------------- */
.postcard { border: 1px solid var(--line); border-radius: 16px; padding: 24px 26px; transition: .2s; display: block; background: rgba(255,255,255,.02); }
.postcard:hover { border-color: var(--line2); background: var(--glass); transform: translateY(-3px); }
.postcard h3 { font-size: 18px; letter-spacing: 1px; color: var(--text); margin-bottom: 8px; }
.postcard:hover h3 { color: var(--cyan-soft); }
.postcard .sum { color: var(--dim); font-size: 14px; }
.pmeta { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--dim); margin-bottom: 10px; align-items: center; }
.pmeta .cat { color: var(--orange); border: 1px solid rgba(255,204,128,.3); padding: 1px 10px; border-radius: 999px; font-size: 12px; }
.pmeta .tag { color: var(--purple); }

/* ---------------- 文章正文排版 ---------------- */
.post-body { font-size: 15.5px; color: var(--dim2); }
.post-body h1, .post-body h2, .post-body h3, .post-body h4 {
  color: var(--text); margin: 34px 0 14px; letter-spacing: 1.5px; line-height: 1.5;
}
.post-body h2 { font-size: 22px; border-left: 3px solid var(--cyan); padding-left: 14px; }
.post-body h3 { font-size: 18px; color: var(--cyan-soft); }
.post-body h4 { font-size: 16px; color: var(--purple); }
.post-body p { margin: 14px 0; }
.post-body a { border-bottom: 1px dashed var(--line2); }
.post-body ul, .post-body ol { padding-left: 26px; margin: 14px 0; }
.post-body li { margin: 6px 0; }
.post-body blockquote {
  border-left: 3px solid var(--purple); background: rgba(167,139,250,.07);
  padding: 12px 18px; margin: 18px 0; border-radius: 0 10px 10px 0; color: var(--dim);
}
.post-body code {
  background: rgba(34,211,238,.1); border: 1px solid var(--line);
  border-radius: 6px; padding: 1px 7px; font-size: 13.5px; color: var(--cyan-soft);
  font-family: Consolas, "JetBrains Mono", monospace;
}
.post-body pre {
  background: #0A101F; border: 1px solid var(--line); border-radius: 12px;
  padding: 18px 20px; overflow-x: auto; margin: 18px 0; line-height: 1.6;
}
.post-body pre code { background: none; border: none; padding: 0; color: #C9D6F0; font-size: 13.5px; }
.post-body table { border-collapse: collapse; width: 100%; margin: 18px 0; font-size: 14px; }
.post-body th, .post-body td { border: 1px solid var(--line); padding: 9px 14px; }
.post-body th { background: rgba(34,211,238,.08); color: var(--cyan-soft); letter-spacing: 1px; }
.post-body hr { border: none; border-top: 1px dashed var(--line); margin: 30px 0; }
.post-body img { border-radius: 12px; border: 1px solid var(--line); }

/* 代码高亮 (pygments 默认 class 输出, 暗色手工配色) */
.highlight { background: none !important; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .ow { color: #C792EA; }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sd, .highlight .sa { color: #A5D6A7; }
.highlight .n, .highlight .na, .highlight .nx, .highlight .nd { color: #89DDFF; }
.highlight .nf, .highlight .fm { color: #82AAFF; }
.highlight .mi, .highlight .mf, .highlight .mh, .highlight .mo { color: #F78C6C; }
.highlight .c, .highlight .c1, .highlight .ch, .highlight .cm, .highlight .cs { color: #5C6B8A; font-style: italic; }
.highlight .o, .highlight .p { color: #89DDFF; }
.highlight .nb, .highlight .nc, .highlight .nn { color: #FFCB6B; }
.highlight .kc { color: #FF5370; }

/* ---------------- 表单 ---------------- */
input[type=text], input[type=password], textarea, select {
  width: 100%; background: rgba(6,10,20,.55); color: var(--text);
  border: 1px solid var(--line); border-radius: 10px; padding: 11px 15px;
  font-size: 14.5px; font-family: inherit; outline: none; transition: border-color .2s;
}
input:focus, textarea:focus { border-color: var(--line2); }
textarea { min-height: 120px; resize: vertical; line-height: 1.7; }
label { display: block; font-size: 13.5px; color: var(--dim); margin: 16px 0 6px; letter-spacing: 1px; }
.form-card { border: 1px solid var(--line); border-radius: 16px; padding: 26px 28px; background: rgba(255,255,255,.02); }
.tip-ok { color: #34d399; font-size: 14px; }
.tip-err { color: #f87171; font-size: 14px; }

/* ---------------- 表格 (管理后台) ---------------- */
.tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.tbl th, .tbl td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; }
.tbl th { background: rgba(34,211,238,.08); color: var(--cyan-soft); letter-spacing: 1px; white-space: nowrap; }
.tbl tr:hover td { background: rgba(34,211,238,.04); }
.state-ok { color: #34d399; font-weight: 600; }
.state-bad { color: #f87171; font-weight: 600; }

/* ---------------- 留言板 ---------------- */
.msg-item { border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; margin-bottom: 14px; background: rgba(255,255,255,.02); }
.msg-head { display: flex; justify-content: space-between; gap: 10px; font-size: 13px; color: var(--dim); margin-bottom: 6px; }
.msg-head b { color: var(--cyan-soft); font-size: 14.5px; letter-spacing: 1px; }
.msg-body { color: var(--dim2); font-size: 14.5px; white-space: pre-wrap; word-break: break-word; }
.avatar {
  width: 38px; height: 38px; border-radius: 50%; flex: none;
  background: linear-gradient(135deg, #0891B2, #6D28D9);
  display: inline-flex; align-items: center; justify-content: center;
  color: #E0F7FF; font-weight: 700; font-size: 16px;
}
.msg-row { display: flex; gap: 14px; }
.msg-main { flex: 1; min-width: 0; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 640px) {
  body { background-attachment: scroll, scroll; background-size: cover, auto cover; }
  .pagehead h1 { font-size: 28px; letter-spacing: 3px; }
  nav .wrap { height: auto; padding: 10px 0; flex-wrap: wrap; }
  .navlinks { gap: 14px; font-size: 13px; }
  .grid { grid-template-columns: 1fr; }
  .card, .postcard { padding: 20px 18px; }
}