:root{
  --bg:#0B0B12;
  --card:#14141F;
  --footer:#0E0E17;
  --card-border:rgba(255,255,255,0.07);
  --line:rgba(255,255,255,0.07);
  --text:#F5F5F7;
  --text-2:#A6A6BD;
  --text-3:#9999B2;
  --text-4:#808099;
  --chip:#C7C7D9;
  --purple:#8B5CF6;
  --green:#22C55E;
  --brown:#B08D57;
  --pi:#E5E7EB;
  --g-purple:rgba(139,92,246,.14);
  --g-green:rgba(34,197,94,.14);
  --g-brown:rgba(176,141,87,.14);
  --g-pi:rgba(229,231,235,.12);
  --border-soft:rgba(255,255,255,.07);
  --nav-bg:rgba(11,11,18,.92);
  --radius:18px;
  --shadow:0 12px 24px rgba(0,0,0,.35);
  --code:#E3B8FF;
  --pre-bg:#0D0D15;
}
:root[data-theme="light"]{
  --bg:#FAFAFB;
  --card:#FFFFFF;
  --footer:#F2F2F5;
  --card-border:rgba(0,0,0,.08);
  --line:rgba(0,0,0,.08);
  --text:#1A1A24;
  --text-2:#4A4A5E;
  --text-3:#66667E;
  --text-4:#8A8AA0;
  --chip:#3A3A4A;
  --border-soft:rgba(0,0,0,.08);
  --nav-bg:rgba(255,255,255,.92);
  --pi:#111827;
  --g-pi:rgba(17,24,39,.12);
  --code:#7C3AED;
  --pre-bg:#F4F4F7;
  --shadow:0 12px 24px rgba(0,0,0,.08);
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);color:var(--text);
  font-family:"Noto Sans SC","Inter",sans-serif;
  -webkit-font-smoothing:antialiased;line-height:1.6;overflow-x:hidden;
}
a{text-decoration:none;color:inherit;}
ul{list-style:none;}
.wrap{width:1200px;max-width:calc(100% - 64px);margin:0 auto;}

/* ===== accent theme ===== */
.accent-purple{--accent:var(--purple);--g-accent:var(--g-purple);}
.accent-brown{--accent:var(--brown);--g-accent:var(--g-brown);}
.accent-green{--accent:var(--green);--g-accent:var(--g-green);}
.accent-pi{--accent:var(--pi);--g-accent:var(--g-pi);}

/* ===== Navbar ===== */
.nav{position:sticky;top:0;z-index:50;background:var(--nav-bg);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);}
.nav-inner{height:76px;display:flex;align-items:center;justify-content:space-between;}
.logo{display:flex;align-items:center;gap:10px;font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:20px;color:var(--text);}
.logo-mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,#8B5CF6,#B08D57);color:#fff;display:flex;align-items:center;justify-content:center;}
.nav-links{display:flex;align-items:center;gap:32px;font-size:15px;font-weight:500;color:var(--text-2);}
.nav-links a:hover{color:var(--text);transition:color .2s;}
.nav-right{display:flex;align-items:center;gap:14px;}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--card);color:var(--text-2);cursor:pointer;transition:color .2s,border-color .2s;}
.theme-toggle:hover{color:var(--text);border-color:var(--purple);}
.theme-toggle svg{display:none;}
.theme-toggle[data-theme-now="dark"] .icon-moon{display:block;}
.theme-toggle[data-theme-now="light"] .icon-sun{display:block;}
.nav-cta{background:var(--purple);color:#fff;font-family:"Inter";font-weight:600;font-size:15px;padding:10px 20px;border-radius:10px;}
.nav-cta:hover{filter:brightness(1.1);transition:filter .2s;}

/* ===== Breadcrumb ===== */
.breadcrumb{padding:24px 0 0;font-size:13px;color:var(--text-3);}
.breadcrumb a{color:var(--text-2);}
.breadcrumb a:hover{color:var(--text);}
.breadcrumb span{color:var(--text-4);margin:0 8px;}

/* ===== 博客列表页 ===== */
.blog-hero{display:flex;justify-content:center;padding:80px 0 8px;}
.blog-head{display:flex;flex-direction:column;align-items:center;text-align:center;gap:14px;}
.kicker{font-family:"Space Grotesk",sans-serif;font-weight:700;font-size:13px;letter-spacing:.08em;text-transform:uppercase;}
.kicker.purple{color:var(--purple);}
.kicker.brown{color:var(--brown);}
.kicker.green{color:var(--green);}
.kicker.pi{color:var(--pi);}
.blog-title{font-size:44px;font-weight:700;color:var(--text);letter-spacing:-.01em;}
.blog-sub{font-size:17px;color:var(--text-2);max-width:600px;line-height:1.8;}

.blog-list{max-width:820px;margin:0 auto;padding:56px 0 120px;display:flex;flex-direction:column;gap:16px;}
.post-card{display:flex;flex-direction:column;gap:10px;background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px 30px;transition:border-color .2s,transform .2s;}
.post-card:hover{border-color:var(--accent);transform:translateY(-3px);}
.post-date{font-family:"Space Grotesk",sans-serif;font-size:13px;letter-spacing:.06em;color:var(--text-3);}
.post-card h2{font-size:22px;font-weight:700;color:var(--text);}
.post-card h2 a:hover{color:var(--accent);}
.post-card p{font-size:14.5px;color:var(--text-2);line-height:1.7;}
.post-more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--accent);margin-top:4px;}
.post-more .arrow{font-family:"Inter";font-weight:600;}
.post-empty{text-align:center;color:var(--text-3);padding:60px 0;}

/* ===== 文章页 ===== */
.post-hero{display:flex;justify-content:center;padding:40px 0 8px;}
.post-head{display:flex;flex-direction:column;gap:14px;max-width:820px;margin:0 auto;}
.post-head h1{font-size:38px;font-weight:700;color:var(--text);letter-spacing:-.01em;line-height:1.25;}
.post-head p{font-size:16px;color:var(--text-2);line-height:1.8;}
.post-divider{height:1px;background:var(--line);margin:8px 0 0;}

.post-body-wrap{padding-top:24px;}
.post-body{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:18px;color:var(--text-2);line-height:1.9;font-size:15.5px;padding-bottom:48px;}
.post-body h2{font-size:24px;font-weight:700;color:var(--text);margin-top:28px;padding-bottom:10px;border-bottom:1px solid var(--line);}
.post-body h2:first-child{margin-top:0;}
.post-body h3{font-size:18px;font-weight:600;color:var(--text);margin-top:22px;}
.post-body h4{font-size:15px;font-weight:600;color:var(--text);margin-top:16px;}
.post-body p{margin:0;}
.post-body ul,.post-body ol{margin:0;padding-left:22px;display:flex;flex-direction:column;gap:8px;}
.post-body ul{list-style:disc;}
.post-body ol{list-style:decimal;}
.post-body li::marker{color:var(--accent);}
.post-body strong{color:var(--text);font-weight:600;}
.post-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px;}
.post-body code{font-family:"JetBrains Mono","SFMono-Regular",Consolas,monospace;font-size:13px;background:var(--border-soft);border:1px solid var(--line);padding:2px 6px;border-radius:5px;color:var(--code);}
.post-body pre{background:var(--pre-bg);border:1px solid var(--line);border-radius:12px;padding:18px 20px;overflow-x:auto;margin:0;}
.post-body pre code{background:none;border:none;padding:0;color:var(--text);font-size:13px;line-height:1.7;display:block;}
.post-body blockquote{margin:0;padding:14px 18px;border-left:3px solid var(--accent);background:var(--card);border-radius:0 10px 10px 0;color:var(--text-2);}
.post-body .callout{display:flex;gap:12px;padding:16px 18px;border-radius:12px;border:1px solid var(--line);background:var(--card);}
.post-body .callout b{color:var(--accent);flex:none;}
.post-body .callout .body{color:var(--text-2);}
.post-body table{width:100%;border-collapse:collapse;font-size:14px;}
.post-body th,.post-body td{text-align:left;padding:10px 14px;border:1px solid var(--line);}
.post-body th{background:var(--card);color:var(--text);font-weight:600;}
.post-body td{color:var(--text-2);}
.post-body hr{border:none;border-top:1px solid var(--line);margin:8px 0;}

.post-back{display:flex;justify-content:center;padding:24px 0 120px;}
.btn-ghost{display:inline-block;border:1px solid var(--line);color:var(--text-2);font-size:15px;font-weight:500;padding:12px 24px;border-radius:12px;}
.btn-ghost:hover{background:var(--border-soft);}

/* ===== Footer ===== */
.footer{background:var(--footer);border-top:1px solid var(--line);}
.footer-inner{width:1200px;max-width:calc(100% - 64px);margin:0 auto;padding:72px 0 40px;display:flex;flex-direction:column;gap:40px;}
.footer-top{display:flex;justify-content:space-between;gap:48px;flex-wrap:wrap;}
.footer-brand{width:400px;max-width:100%;display:flex;flex-direction:column;gap:16px;}
.footer-brand .logo{font-size:19px;}
.footer-brand p{font-size:14px;color:var(--text-3);max-width:320px;}
.link-cols{display:flex;gap:72px;flex-wrap:wrap;}
.link-col{display:flex;flex-direction:column;gap:14px;}
.link-col b{font-size:15px;font-weight:700;color:var(--text);}
.link-col a{font-size:14px;color:var(--text-4);}
.link-col a:hover{color:var(--text-2);transition:color .2s;}
.footer-divider{height:1px;background:var(--line);}
.footer-bottom{display:flex;justify-content:center;font-size:13px;color:var(--text-4);}

/* ===== Responsive ===== */
@media(max-width:1024px){.nav-links{display:none;}}
@media(max-width:680px){
  .blog-title{font-size:32px;}
  .post-head h1{font-size:28px;}
  .post-card{padding:22px 20px;}
  .blog-list{padding-top:40px;}
}