/* ===== 柠序博客 · Core Styles ===== */
:root{
  --bg:#07080d; --bg-soft:#0d0f17; --panel:rgba(255,255,255,.045);
  --panel-strong:rgba(255,255,255,.07); --border:rgba(255,255,255,.09);
  --text:#eef1f8; --muted:#9aa3b8; --faint:#6b7488;
  --a1:#22d3ee; --a2:#818cf8; --a3:#f472b6;
  --grad:linear-gradient(120deg,#22d3ee,#818cf8 45%,#f472b6);
  --grad-soft:linear-gradient(120deg,rgba(34,211,238,.16),rgba(129,140,248,.16),rgba(244,114,182,.16));
  --shadow:0 20px 60px -20px rgba(0,0,0,.75);
  --radius:20px; --radius-sm:12px;
  --ease:cubic-bezier(.22,1,.36,1);
  --maxw:1180px;
}
html[data-theme="light"]{
  --bg:#f6f7fb; --bg-soft:#ffffff; --panel:rgba(255,255,255,.75);
  --panel-strong:rgba(255,255,255,.9); --border:rgba(15,23,42,.08);
  --text:#0f172a; --muted:#5b6478; --faint:#8892a6;
  --shadow:0 20px 50px -24px rgba(15,23,42,.25);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
  background:var(--bg); color:var(--text); line-height:1.7; overflow-x:hidden;
  -webkit-font-smoothing:antialiased; transition:background .5s var(--ease), color .5s var(--ease);
}
body::before{
  content:''; position:fixed; inset:0; z-index:-2; pointer-events:none;
  background:radial-gradient(1000px 600px at 15% -10%, rgba(34,211,238,.16), transparent 60%),
             radial-gradient(900px 600px at 90% 0%, rgba(244,114,182,.13), transparent 55%),
             radial-gradient(900px 700px at 50% 110%, rgba(129,140,248,.14), transparent 60%);
}
body::after{
  content:''; position:fixed; inset:0; z-index:-3; pointer-events:none; opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);
  background-size:44px 44px; mask-image:radial-gradient(circle at 50% 30%,#000,transparent 75%);
}
html[data-theme="light"] body::after{background-image:linear-gradient(rgba(15,23,42,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(15,23,42,.03) 1px,transparent 1px)}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
::selection{background:rgba(129,140,248,.35)}

/* scrollbar */
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:rgba(129,140,248,.3);border-radius:20px;border:3px solid transparent;background-clip:content-box}
::-webkit-scrollbar-thumb:hover{background:rgba(129,140,248,.6);background-clip:content-box}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ===== reading progress ===== */
#progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:999;background:var(--grad);box-shadow:0 0 18px rgba(129,140,248,.8);transition:width .1s linear}

/* ===== header ===== */
header.nav{position:sticky;top:0;z-index:900;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  background:color-mix(in srgb,var(--bg) 70%,transparent);border-bottom:1px solid transparent;transition:.4s var(--ease)}
header.nav.scrolled{border-bottom-color:var(--border);background:color-mix(in srgb,var(--bg) 82%,transparent)}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:26px}
.logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:19px;letter-spacing:.4px}
.logo .mark{width:34px;height:34px;border-radius:10px;background:var(--grad);display:grid;place-items:center;color:#fff;font-weight:900;font-size:16px;box-shadow:0 8px 24px -8px rgba(129,140,248,.9);animation:float 6s ease-in-out infinite}
.logo span.sub{font-size:11px;color:var(--faint);font-weight:500;letter-spacing:2px}
nav.links{display:flex;gap:6px;margin-left:auto}
nav.links a{padding:8px 15px;border-radius:10px;color:var(--muted);font-size:14.5px;font-weight:500;position:relative;transition:.3s var(--ease)}
nav.links a:hover{color:var(--text);background:var(--panel)}
nav.links a.active{color:var(--text)}
nav.links a.active::after{content:'';position:absolute;left:15px;right:15px;bottom:2px;height:2px;border-radius:2px;background:var(--grad)}
.nav-actions{display:flex;gap:8px;align-items:center}
.icon-btn{width:40px;height:40px;border-radius:11px;border:1px solid var(--border);background:var(--panel);color:var(--text);display:grid;place-items:center;cursor:pointer;transition:.3s var(--ease)}
.icon-btn:hover{transform:translateY(-2px);border-color:rgba(129,140,248,.5);box-shadow:0 10px 30px -12px rgba(129,140,248,.7)}
.burger{display:none}

/* ===== hero ===== */
.hero{position:relative;padding:110px 0 80px;overflow:hidden}
.hero-glow{position:absolute;width:600px;height:600px;border-radius:50%;filter:blur(90px);opacity:.5;z-index:-1;pointer-events:none}
.hero-glow.g1{background:radial-gradient(circle,rgba(34,211,238,.5),transparent 70%);top:-220px;left:-120px;animation:float 9s ease-in-out infinite}
.hero-glow.g2{background:radial-gradient(circle,rgba(244,114,182,.45),transparent 70%);top:-160px;right:-140px;animation:float 11s ease-in-out infinite reverse}
.badge{display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:100px;border:1px solid var(--border);background:var(--panel);font-size:13px;color:var(--muted);margin-bottom:26px;animation:fadeUp .8s var(--ease) both}
.badge .dot{width:7px;height:7px;border-radius:50%;background:#34d399;box-shadow:0 0 12px #34d399;animation:pulse 2s infinite}
.hero h1{font-size:clamp(34px,6vw,64px);line-height:1.12;font-weight:850;letter-spacing:-1px;margin-bottom:22px;animation:fadeUp .9s .05s var(--ease) both}
.hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;background-size:200% auto;animation:shine 5s linear infinite}
.hero p.lead{font-size:clamp(16px,2.2vw,20px);color:var(--muted);max-width:640px;margin-bottom:36px;animation:fadeUp .9s .12s var(--ease) both}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;animation:fadeUp .9s .2s var(--ease) both}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 26px;border-radius:13px;font-weight:650;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.35s var(--ease);position:relative;overflow:hidden}
.btn-primary{background:var(--grad);color:#fff;background-size:200% auto;box-shadow:0 16px 40px -16px rgba(129,140,248,.95)}
.btn-primary:hover{background-position:right center;transform:translateY(-3px);box-shadow:0 24px 54px -18px rgba(129,140,248,1)}
.btn-ghost{background:var(--panel);border-color:var(--border);color:var(--text)}
.btn-ghost:hover{transform:translateY(-3px);border-color:rgba(129,140,248,.5)}
.hero-stats{display:flex;gap:44px;margin-top:56px;flex-wrap:wrap;animation:fadeUp .9s .3s var(--ease) both}
.hero-stats .st b{display:block;font-size:30px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats .st span{font-size:13px;color:var(--faint);letter-spacing:1px}

/* ===== section head ===== */
.section{padding:64px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:34px;gap:20px;flex-wrap:wrap}
.sec-head h2{font-size:clamp(24px,3.4vw,34px);font-weight:800;letter-spacing:-.5px;display:flex;align-items:center;gap:12px}
.sec-head h2::before{content:'';width:6px;height:26px;border-radius:4px;background:var(--grad)}
.sec-head p{color:var(--muted);font-size:14.5px;margin-top:6px}

/* ===== toolbar / search ===== */
.toolbar{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:28px}
.search{position:relative;flex:1;min-width:220px;max-width:420px}
.search input{width:100%;padding:13px 16px 13px 44px;border-radius:13px;border:1px solid var(--border);background:var(--panel);color:var(--text);font-size:14.5px;outline:none;transition:.3s var(--ease)}
.search input:focus{border-color:rgba(129,140,248,.6);box-shadow:0 0 0 4px rgba(129,140,248,.14)}
.search svg{position:absolute;left:15px;top:50%;transform:translateY(-50%);color:var(--faint)}
.tags{display:flex;gap:9px;flex-wrap:wrap}
.tag{padding:8px 15px;border-radius:100px;border:1px solid var(--border);background:var(--panel);font-size:13px;color:var(--muted);cursor:pointer;transition:.3s var(--ease)}
.tag:hover{color:var(--text);transform:translateY(-2px)}
.tag.active{background:var(--grad);color:#fff;border-color:transparent}
.tag small{opacity:.7;margin-left:4px}

/* ===== post grid ===== */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:26px}
.card{position:relative;border-radius:var(--radius);border:1px solid var(--border);background:var(--panel);overflow:hidden;cursor:pointer;transition:transform .5s var(--ease),border-color .4s,box-shadow .5s var(--ease);opacity:0;transform:translateY(28px)}
.card.in{opacity:1;transform:translateY(0)}
.card::before{content:'';position:absolute;inset:0;border-radius:inherit;padding:1px;background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:.4s;z-index:2;pointer-events:none}
.card:hover{transform:translateY(-8px);box-shadow:var(--shadow)}
.card:hover::before{opacity:1}
.card .thumb{height:190px;background:var(--grad-soft);overflow:hidden;position:relative}
.card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease)}
.card:hover .thumb img{transform:scale(1.07)}
.card .thumb .ph{width:100%;height:100%;display:grid;place-items:center;font-size:40px;font-weight:900;color:#fff;background:var(--grad);background-size:200% auto;animation:shine 6s linear infinite}
.card .body{padding:22px 22px 24px}
.card .meta{display:flex;gap:14px;font-size:12.5px;color:var(--faint);margin-bottom:11px;align-items:center}
.card .meta .pin{color:var(--a3);font-weight:700}
.card h3{font-size:19px;font-weight:750;line-height:1.4;margin-bottom:9px;transition:color .3s}
.card:hover h3{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.card .sum{font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card .foot{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}
.card .foot .t{font-size:12px;padding:4px 11px;border-radius:100px;background:rgba(129,140,248,.12);color:var(--a2);border:1px solid rgba(129,140,248,.2)}

/* skeleton */
.skel{border-radius:var(--radius);border:1px solid var(--border);background:var(--panel);height:340px;position:relative;overflow:hidden}
.skel::after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.06),transparent);animation:shimmer 1.4s infinite}

.empty{text-align:center;padding:80px 20px;color:var(--faint)}
.empty .em{font-size:52px;margin-bottom:14px;opacity:.6}

/* pagination */
.pager{display:flex;justify-content:center;gap:8px;margin-top:44px}
.pager button{min-width:42px;height:42px;border-radius:11px;border:1px solid var(--border);background:var(--panel);color:var(--muted);cursor:pointer;transition:.3s var(--ease);font-weight:600}
.pager button:hover:not(:disabled){color:var(--text);transform:translateY(-2px)}
.pager button.active{background:var(--grad);color:#fff;border-color:transparent}
.pager button:disabled{opacity:.35;cursor:not-allowed}

/* ===== footer ===== */
footer.site{margin-top:80px;border-top:1px solid var(--border);background:color-mix(in srgb,var(--bg-soft) 60%,transparent);position:relative;overflow:hidden}
footer.site .glow{position:absolute;width:500px;height:300px;bottom:-160px;left:50%;transform:translateX(-50%);background:radial-gradient(circle,rgba(129,140,248,.25),transparent 70%);filter:blur(60px)}
.foot-inner{max-width:var(--maxw);margin:0 auto;padding:56px 24px 34px;position:relative}
.foot-top{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;margin-bottom:44px}
.foot-brand .logo{margin-bottom:16px}
.foot-brand p{color:var(--muted);font-size:14px;max-width:320px}
.foot-col h4{font-size:14px;margin-bottom:16px;letter-spacing:.5px}
.foot-col a{display:block;color:var(--muted);font-size:14px;padding:5px 0;transition:.25s}
.foot-col a:hover{color:var(--text);transform:translateX(4px)}
.foot-bottom{border-top:1px solid var(--border);padding-top:24px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13.5px;color:var(--faint)}
.foot-bottom .brand strong{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:800}

/* ===== toast ===== */
#toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%) translateY(100px);z-index:2000;background:var(--panel-strong);backdrop-filter:blur(16px);border:1px solid var(--border);padding:13px 22px;border-radius:13px;font-size:14px;box-shadow:var(--shadow);opacity:0;transition:.45s var(--ease)}
#toast.show{transform:translateX(-50%) translateY(0);opacity:1}

/* ===== anims ===== */
@keyframes fadeUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@keyframes shine{to{background-position:200% center}}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(.75)}}
@keyframes shimmer{100%{transform:translateX(100%)}}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== responsive ===== */
@media(max-width:860px){
  nav.links{position:fixed;inset:64px 16px auto 16px;flex-direction:column;background:var(--panel-strong);backdrop-filter:blur(20px);border:1px solid var(--border);border-radius:18px;padding:12px;gap:4px;opacity:0;pointer-events:none;transform:translateY(-12px);transition:.35s var(--ease);box-shadow:var(--shadow)}
  nav.links.open{opacity:1;pointer-events:auto;transform:translateY(0)}
  nav.links a{padding:13px 16px}
  .burger{display:grid}
  .foot-top{grid-template-columns:1fr}
  .hero{padding:80px 0 60px}
}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}