/* ============================================================
   MD595 — 极简个人博客主题
   ============================================================ */

:root {
  --accent: #2f6fed;
  --accent-soft: rgba(47, 111, 237, .10);
  --bg: #f7f8fa;
  --card: #ffffff;
  --text: #1c2433;
  --text-soft: #5a6577;
  --text-faint: #94a0b3;
  --line: #e7ebf1;
  --radius: 14px;
  --maxw: 780px;
  --shadow: 0 8px 28px rgba(20, 35, 60, .06);
}

html[data-theme="dark"] {
  --accent-soft: rgba(96, 150, 255, .16);
  --bg: #0e1420;
  --card: #151d2c;
  --text: #e7ecf4;
  --text-soft: #a6b1c3;
  --text-faint: #6c788e;
  --line: #222c3e;
  --shadow: 0 8px 28px rgba(0, 0, 0, .35);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  transition: background .3s ease, color .3s ease;
}

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

::selection { background: var(--accent); color: #fff; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.main { padding: 32px 0 64px; }

/* ============ 顶栏 ============ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; gap: 18px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 600; }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 9px; flex: 0 0 auto;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 60%, #000));
  color: #fff; font-size: 15px; font-weight: 700;
}
.brand-name { font-size: 16px; letter-spacing: .02em; }
.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a {
  color: var(--text-soft); font-size: 14px; padding: 6px 11px; border-radius: 8px;
}
.nav a:hover { color: var(--text); background: var(--accent-soft); text-decoration: none; }
.nav a.current { color: var(--accent); background: var(--accent-soft); font-weight: 500; }
.theme-toggle {
  border: 1px solid var(--line); background: var(--card); color: var(--text-soft);
  width: 34px; height: 34px; border-radius: 10px; cursor: pointer;
  display: grid; place-items: center; flex: 0 0 auto;
}
.theme-toggle:hover { color: var(--accent); }
.icon-moon { display: none; }
html[data-theme="dark"] .icon-sun { display: none; }
html[data-theme="dark"] .icon-moon { display: block; }

/* ============ 首页 Hero ============ */
.hero { text-align: center; padding: 60px 0 44px; }
.hero-avatar {
  width: 96px; height: 96px; border-radius: 50%; object-fit: cover;
  border: 3px solid var(--card); box-shadow: var(--shadow);
}
.hero-avatar-placeholder {
  display: inline-grid; place-items: center;
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 60%, #000));
  color: #fff; font-size: 36px; font-weight: 700;
  margin: 0 auto;
}
.hero-title { font-size: 30px; font-weight: 700; margin-top: 20px; letter-spacing: .01em; }
.hero-bio { color: var(--text-soft); margin-top: 10px; max-width: 520px; margin-left: auto; margin-right: auto; }
.hero-social { margin-top: 22px; display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
.social {
  width: 38px; height: 38px; border-radius: 50%; display: grid; place-items: center;
  background: var(--card); color: var(--text-soft); border: 1px solid var(--line);
  transition: transform .15s ease, color .15s ease, border-color .15s ease;
}
.social:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); text-decoration: none; }
.social-empty { font-size: 13px; color: var(--text-faint); }

/* ============ 列表 ============ */
.list-head { padding: 24px 0 8px; }
.list-title { font-size: 22px; font-weight: 600; }
.post-list { display: flex; flex-direction: column; gap: 0; }
.post-item { padding: 26px 0; border-bottom: 1px solid var(--line); }
.post-item-title { font-size: 20px; font-weight: 600; line-height: 1.4; }
.post-item-title a { color: var(--text); }
.post-item-title a:hover { color: var(--accent); text-decoration: none; }
.post-item-meta { color: var(--text-faint); font-size: 13px; margin-top: 8px; display: flex; gap: 6px; align-items: center; }
.post-item-meta a { color: var(--text-faint); }
.dot { opacity: .6; }
.post-item-excerpt { color: var(--text-soft); font-size: 15px; margin-top: 10px; }
.post-item-more { display: inline-block; font-size: 14px; margin-top: 12px; }

/* 分页 */
.page-navigator { display: flex; gap: 8px; justify-content: center; margin: 40px 0 10px; flex-wrap: wrap; }
.page-navigator a, .page-navigator .current {
  min-width: 36px; height: 36px; padding: 0 12px; border-radius: 9px;
  display: grid; place-items: center; font-size: 14px;
  border: 1px solid var(--line); background: var(--card); color: var(--text-soft);
}
.page-navigator a:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.page-navigator .current { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ============ 文章详情 ============ */
.post-detail { padding-top: 8px; }
.post-title { font-size: 30px; font-weight: 700; line-height: 1.3; }
.post-title a { color: var(--text); }
.post-meta { color: var(--text-faint); font-size: 14px; margin: 12px 0 4px; display: flex; gap: 6px; flex-wrap: wrap; }
.post-meta a { color: var(--text-faint); }
.post-body { margin-top: 24px; font-size: 16.5px; }
.post-body p { margin: 0 0 18px; }
.post-body h2, .post-body h3, .post-body h4 { margin: 30px 0 14px; font-weight: 600; line-height: 1.4; }
.post-body h2 { font-size: 22px; }
.post-body h3 { font-size: 19px; }
.post-body h4 { font-size: 17px; }
.post-body a { border-bottom: 1px solid color-mix(in srgb, var(--accent) 40%, transparent); }
.post-body a:hover { border-bottom-color: var(--accent); }
.post-body img { max-width: 100%; height: auto; border-radius: 10px; display: block; margin: 20px auto; }
.post-body blockquote {
  border-left: 3px solid var(--accent); background: var(--accent-soft);
  padding: 14px 18px; border-radius: 0 10px 10px 0; color: var(--text-soft);
  margin: 0 0 18px;
}
.post-body blockquote p { margin: 0; }
.post-body code {
  font-family: "SF Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .88em; background: var(--accent-soft); color: var(--accent);
  padding: 2px 6px; border-radius: 5px;
}
.post-body pre {
  background: #0d1522; color: #e6eefb; padding: 18px; border-radius: 12px;
  overflow-x: auto; margin: 0 0 18px; font-size: 14px; line-height: 1.6;
}
.post-body pre code { background: none; color: inherit; padding: 0; }
.post-body ul, .post-body ol { margin: 0 0 18px; padding-left: 24px; }
.post-body li { margin-bottom: 6px; }
.post-body hr { border: none; border-top: 1px solid var(--line); margin: 28px 0; }
.post-tags { color: var(--text-soft); font-size: 14px; margin-top: 22px; }
.post-tags a { margin-right: 8px; }

.post-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 30px; font-size: 14px; color: var(--text-soft); }
.post-nav span { max-width: 48%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ============ 评论 ============ */
.comments { margin-top: 44px; padding-top: 28px; border-top: 1px solid var(--line); }
.comments-title, .respond-title { font-size: 18px; font-weight: 600; margin-bottom: 18px; }
.comment-list { list-style: none; }
.comment-list li { padding: 18px 0; border-bottom: 1px solid var(--line); }
.comment-list .comment-author { display: flex; align-items: center; gap: 10px; font-weight: 500; }
.comment-list .comment-author img { width: 36px; height: 36px; border-radius: 50%; }
.comment-list .comment-meta { font-size: 12px; color: var(--text-faint); margin-left: auto; }
.comment-list .comment-content { margin-top: 10px; color: var(--text-soft); font-size: 15px; }
.comment-list .comment-reply { font-size: 13px; margin-top: 8px; }
.comment-list .comment-children { list-style: none; margin-left: 24px; }
.comment-list .cancel-comment-reply { margin-bottom: 10px; }

.respond { margin-top: 30px; }
.comment-form .form-row { display: flex; flex-wrap: wrap; gap: 10px; }
.comment-form .field {
  width: 100%; padding: 11px 14px; font-size: 14px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); color: var(--text);
  font-family: inherit; outline: none; transition: border-color .15s ease;
}
.comment-form .form-row .field { flex: 1 1 180px; }
.comment-form .field:focus { border-color: var(--accent); }
.comment-form .textarea { min-height: 120px; resize: vertical; margin-top: 10px; }
.comment-form .submit {
  margin-top: 12px; padding: 10px 22px; border: none; border-radius: 10px;
  background: var(--accent); color: #fff; font-size: 14px; cursor: pointer;
}
.comment-form .submit:hover { filter: brightness(1.08); }
.logged-as { font-size: 14px; color: var(--text-soft); margin-bottom: 10px; }
.comment-closed { color: var(--text-faint); font-size: 14px; }

/* ============ 空状态 / 404 ============ */
.empty { text-align: center; color: var(--text-faint); padding: 60px 0; }
.error-page { text-align: center; padding: 70px 0; }
.error-code { font-size: 90px; font-weight: 800; line-height: 1; color: var(--accent); }
.error-text { color: var(--text-soft); margin: 16px 0 24px; }
.error-search { display: flex; gap: 8px; max-width: 360px; margin: 0 auto; }
.error-search input {
  flex: 1; padding: 11px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--card); color: var(--text); font-size: 14px; outline: none;
}
.error-search input:focus { border-color: var(--accent); }
.error-search button {
  padding: 0 18px; border: none; border-radius: 10px; background: var(--accent);
  color: #fff; cursor: pointer; font-size: 14px;
}
.error-home { display: inline-block; margin-top: 22px; font-size: 14px; }

/* ============ 页脚 ============ */
.site-footer { border-top: 1px solid var(--line); padding: 34px 0 40px; text-align: center; }
.footer-inner p { color: var(--text-faint); font-size: 13px; }
.footer-inner a { color: var(--text-soft); }
.footer-note { margin-top: 6px; opacity: .8; }

/* ============ 回到顶部 ============ */
.back-top {
  position: fixed; right: 22px; bottom: 26px; z-index: 40;
  width: 40px; height: 40px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--card); color: var(--text-soft); cursor: pointer;
  display: grid; place-items: center; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transform: translateY(8px);
  transition: opacity .25s ease, transform .25s ease;
}
.back-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-top:hover { color: var(--accent); }

/* ============ 响应式 ============ */
@media (max-width: 640px) {
  .nav a { padding: 6px 8px; }
  .brand-name { display: none; }
  .hero-title { font-size: 26px; }
  .post-title { font-size: 24px; }
  .post-item-title { font-size: 18px; }
}

/* MD595 journal refresh · 2026-10 */
:root{--accent:#2563eb!important;--accent-soft:#e9f0ff;--bg:#f5f8ff;--card:#ffffff;--text:#172c4b;--text-soft:#536580;--text-faint:#65758d;--line:#dce5f2;--maxw:1120px;--radius:16px;--shadow:0 12px 40px rgba(30,64,120,.06);color-scheme:light}
html[data-theme="dark"]{--accent:#8bb5ff!important;--accent-soft:#1c3358;--bg:#101a2b;--card:#16243a;--text:#edf3ff;--text-soft:#b3c3db;--text-faint:#a1b3cd;--line:#2c405d;--shadow:0 12px 40px rgba(0,0,0,.12);color-scheme:dark}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.8}
body{min-height:100vh;display:flex;flex-direction:column}
.container{width:100%;padding-left:36px;padding-right:36px}
.main{padding-top:0;padding-bottom:90px;flex:1}
.site-header{background:var(--bg);background:color-mix(in srgb,var(--bg) 93%,transparent)}
.header-inner{height:84px;gap:24px}
.brand{gap:13px}.brand-name{font-size:17px;letter-spacing:.1em;font-weight:650}
.brand-mark{position:relative;display:flex;align-items:center;justify-content:center;background:var(--text);color:var(--bg);height:36px;width:36px;border-radius:10px;font-family:Georgia,serif;font-size:26px;font-weight:400;letter-spacing:-3px;padding-right:3px}.brand-mark-dot{color:#9cc0ff}
.nav{gap:15px}.nav a{padding:7px 4px;border-radius:0}.nav a.current{color:var(--accent);background:none;border-bottom:2px solid var(--accent)}.nav a:hover{background:none;color:var(--accent)}
.theme-toggle{border-radius:50%;width:36px;height:36px;background:transparent}
.journal-hero{display:grid;grid-template-columns:1.2fr 1fr;gap:48px;text-align:left;padding:78px 0 64px;align-items:center;border-bottom:1px solid var(--line)}
.eyebrow{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:11px;letter-spacing:.14em;color:var(--text-soft);font-weight:500;line-height:1.6}
.hero-copy>.eyebrow{display:flex;align-items:center;gap:9px}.status-dot{height:7px;width:7px;border-radius:50%;background:var(--accent)}
.hero-title{font-size:18px;letter-spacing:.03em;margin-top:24px;font-weight:500;color:var(--text-soft);line-height:1.5}.hero-title-note{display:block;color:var(--text);font-size:46px;font-weight:650;letter-spacing:-.045em;line-height:1.35;margin-top:10px}
.hero-bio{font-size:15px;margin:22px 0 0;max-width:440px;line-height:1.9;color:var(--text-soft)}
.hero-topics{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px}.hero-topics span{font-size:11px;letter-spacing:.02em;border:1px solid var(--line);border-radius:5px;padding:3px 9px;color:var(--text-soft)}
.hero-actions{display:flex;align-items:center;gap:25px;flex-wrap:wrap;margin-top:30px}
.button-primary{display:inline-flex;align-items:center;gap:24px;padding:10px 19px;border:1px solid var(--accent);border-radius:7px;background:var(--accent);color:var(--card);font-size:13px;font-weight:550}.button-primary:hover{filter:brightness(1.08);text-decoration:none;transform:translateY(-1px)}
html[data-theme="dark"] .button-primary{color:#10203b}.button-text{font-size:13px;font-weight:500;display:inline-flex;align-items:center;gap:12px;color:var(--accent)}
.quant-art{position:relative;transform:rotate(-2deg);background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:9px 12px 0 var(--accent-soft);color:var(--accent)}
.quant-art svg{display:block;width:100%;height:auto;margin:28px 0 12px}.art-topline{display:flex;justify-content:space-between;gap:8px;font:9px ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.08em;color:var(--text-soft)}
.art-bottomline{display:flex;align-items:center;justify-content:space-between;padding-top:18px;border-top:1px solid var(--line);font-size:12px;color:var(--text-soft)}.art-monogram{font-family:serif;color:var(--accent);border:1px solid var(--accent);border-radius:4px;padding:0 6px;transform:rotate(4deg);font-size:19px}
.journal-toolbar{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:42px 0 25px;scroll-margin-top:110px}.journal-toolbar h2{font-size:24px;letter-spacing:-.02em;font-weight:600;margin-top:6px}
.journal-search{display:flex;align-items:center;max-width:270px;width:100%;background:var(--card);border:1px solid var(--line);border-radius:8px;overflow:hidden}.journal-search:focus-within{border-color:var(--accent);outline:2px solid var(--accent-soft)}.journal-search input{font:inherit;font-size:13px;border:0;color:var(--text);background:transparent;min-width:0;width:100%;padding:11px 13px;outline:none}.journal-search input::placeholder{color:var(--text-faint)}.journal-search button{background:none;border:0;color:var(--text-soft);cursor:pointer;width:44px;min-height:44px;flex-shrink:0;display:grid;place-items:center}
.empty{border:1px dashed var(--line);border-radius:12px;background:var(--card);padding:46px 24px 48px}.empty-symbol{font-size:38px;line-height:1;color:var(--accent);display:block;margin-bottom:18px}.empty h3{font-size:19px;font-weight:500;color:var(--text);margin-bottom:10px}.empty p{font-size:14px;color:var(--text-soft);line-height:1.95}.empty .button-text{margin-top:22px}
.post-list{gap:16px}.post-item{border:1px solid var(--line);border-radius:12px;background:var(--card);padding:28px 30px;transition:border-color .2s,transform .2s}.post-item:hover{border-color:var(--accent);transform:translateY(-2px)}.post-item-title{font-size:23px}.post-item-meta,.post-meta{color:var(--text-soft)}.post-item-meta a,.post-meta a{color:var(--text-soft)}.post-item-excerpt{line-height:1.95;max-width:780px}.post-item-more{font-size:13px;margin-top:18px}
.list-head{padding:48px 0 25px}.post-detail{max-width:780px;margin:54px auto 0}.post-title{font-size:36px;line-height:1.45;letter-spacing:-.03em}.post-body{margin-top:32px;font-size:16px;line-height:1.95;overflow-wrap:anywhere}.post-body h2,.post-body h3,.post-body h4{scroll-margin-top:110px}.post-body table{display:block;max-width:100%;overflow-x:auto;border-collapse:collapse;margin-bottom:24px;font-size:14px}.post-body th,.post-body td{border:1px solid var(--line);padding:10px 14px;text-align:left;white-space:normal}.post-body th{background:var(--accent-soft)}.post-body iframe,.post-body video{max-width:100%}.post-body pre{overscroll-behavior-x:contain}.comments,.post-nav{max-width:780px;margin-left:auto;margin-right:auto}.post-body blockquote{border-radius:0 6px 6px 0}.post-body img{border:1px solid var(--line)}
.site-footer{text-align:left;padding:28px 0 32px}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.footer-inner p{color:var(--text-soft);font-size:12px}.footer-note{margin:0;opacity:1}.footer-note span{margin:0 10px;color:var(--text-faint)}.footer-note a{color:var(--accent)}
.back-top{border-radius:50%}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:-100px;left:20px;z-index:100;background:var(--card);color:var(--text);padding:10px 16px;border:2px solid var(--accent);border-radius:6px}.skip-link:focus{top:12px}:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
@media(min-width:1400px){.journal-hero{padding-top:95px;padding-bottom:80px}}
@media(max-width:900px){.journal-hero{gap:30px;padding-top:56px;padding-bottom:48px}.hero-title-note{font-size:37px}.quant-art{padding:18px}.art-topline{font-size:8px}.quant-art svg{margin-top:20px}.hero-bio{font-size:14px}.art-bottomline{font-size:11px}}
@media(max-width:640px){.container{padding-left:22px;padding-right:22px}.header-inner{height:70px;gap:15px}.brand-name{display:block;font-size:15px}.brand-mark{width:32px;height:32px;font-size:23px}.brand{gap:9px}.nav{gap:10px}.nav a{font-size:13px;padding:7px 2px}.theme-toggle{height:34px;width:34px}.journal-hero{grid-template-columns:1fr;gap:34px;padding:40px 0}.hero-title{margin-top:20px;font-size:16px}.hero-title-note{font-size:38px}.hero-bio{margin-top:18px;font-size:14px}.hero-actions{margin-top:24px}.quant-art{transform:none;box-shadow:5px 6px 0 var(--accent-soft);padding:20px}.quant-art svg{max-height:225px;margin:14px auto 4px}.art-topline{font-size:9px}.art-bottomline{padding-top:12px}.journal-toolbar{align-items:flex-start;flex-direction:column;gap:18px;padding-top:34px;padding-bottom:22px}.journal-toolbar h2{font-size:22px}.journal-search{max-width:none}.empty{padding:34px 16px}.empty h3{font-size:17px}.empty p{font-size:13px}.main{padding-bottom:54px}.post-item{padding:22px}.post-item-title{font-size:20px}.post-detail{margin-top:34px}.post-title{font-size:28px}.post-body{font-size:16px}.footer-inner{gap:7px;align-items:flex-start;flex-direction:column}.post-nav{flex-wrap:wrap}.back-top{right:15px;bottom:18px}.eyebrow{font-size:10px}}
@media(max-width:360px){.container{padding-left:16px;padding-right:16px}.header-inner{gap:10px}.brand-name{font-size:13px}.hero-title-note{font-size:33px}.nav{gap:8px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}.post-item:hover,.button-primary:hover{transform:none}}

/* Blue interaction accents */
.click-wave{position:fixed;z-index:90;pointer-events:none;border:1px solid rgba(59,130,246,.4);background:radial-gradient(circle,rgba(59,130,246,.2) 0%,rgba(59,130,246,.08) 55%,transparent 72%);border-radius:50%;transform:translate(-50%,-50%) scale(.15);animation:click-wave-out 1s cubic-bezier(.16,1,.3,1) forwards}
html[data-theme="dark"] .click-wave{border-color:rgba(139,181,255,.5);background:radial-gradient(circle,rgba(139,181,255,.24),transparent 72%)}
@keyframes click-wave-out{0%{opacity:.9;transform:translate(-50%,-50%) scale(.15)}100%{opacity:0;transform:translate(-50%,-50%) scale(1)}}
.button-primary,.theme-toggle,.journal-search button,.nav a,.button-text,.social,.back-top{transition:transform .16s ease,background .16s ease,color .16s ease,box-shadow .16s ease}
.button-primary:active,.theme-toggle:active,.journal-search button:active,.back-top:active{transform:scale(.94)}
.nav a:active,.button-text:active,.social:active{transform:translateY(1px)}
@media(prefers-reduced-motion:reduce){.click-wave{display:none}.button-primary:active,.theme-toggle:active,.journal-search button:active,.back-top:active,.nav a:active,.button-text:active,.social:active{transform:none}}

/* Personal photo avatar */
.profile-photo{display:block;width:80px;height:80px;object-fit:cover;object-position:50% 55%;border-radius:50%;border:3px solid var(--card);outline:1px solid var(--line);box-shadow:0 6px 20px rgba(30,64,120,.1);margin-bottom:22px}
.brand-photo{display:block;width:36px;height:36px;flex-shrink:0;object-fit:cover;object-position:50% 55%;border-radius:50%;border:1px solid var(--line)}
@media(max-width:640px){.profile-photo{width:72px;height:72px;margin-bottom:20px}.brand-photo{width:32px;height:32px}}