/* ============================================================
   顶级小脑 · TOP CEREBELLUM —— 样式表 (styles.css)
   由原 index.html 的 <style> 抽出，便于独立维护样式。
   区块顺序：主题变量 / 基础 / 顶栏 / Hero / 区块 / 应用卡片 / 外链 / Toast / 入场动画 / 响应式
   ============================================================ */
/* ============================================================
   主题变量：夜 = Dark Neural / 昼 = Light Lab
   ============================================================ */
:root{ --r:18px; --ease:cubic-bezier(.2,.8,.25,1); }

html[data-theme="dark"]{
  --bg:#04060d;
  --fg:#e9edf9; --muted:#8a94b3;
  --panel:rgba(255,255,255,.045); --panel-hi:rgba(255,255,255,.075);
  --line:rgba(255,255,255,.09); --line-strong:rgba(255,255,255,.16);
  --a1:#22d3ee; --a2:#a78bfa; --a3:#f472b6;
  --ok:#34d399; --ok-bg:rgba(52,211,153,.12);
  --shadow:0 18px 40px -24px rgba(34,211,238,.7);
  --shadow-lift:0 22px 48px -24px rgba(167,139,250,.75);
  --glow:rgba(34,211,238,.18);
  --canvas-op:.85;
  --mono-bg:linear-gradient(140deg,rgba(167,139,250,.24),rgba(34,211,238,.18));
  --mono-fg:#dbe4ff;
  --topbar:rgba(4,6,13,.9);
}
html[data-theme="light"]{
  --bg:#f5f6fa;
  --fg:#141a2e; --muted:#6b7590;
  --panel:#ffffff; --panel-hi:#ffffff;
  --line:rgba(20,26,46,.09); --line-strong:rgba(20,26,46,.16);
  --a1:#4f46e5; --a2:#06b6d4; --a3:#f59e0b;
  --ok:#047857; --ok-bg:rgba(16,185,129,.12);
  --shadow:0 1px 2px rgba(20,26,46,.04),0 8px 24px -14px rgba(20,26,46,.18);
  --shadow-lift:0 2px 4px rgba(20,26,46,.05),0 20px 40px -20px rgba(79,70,229,.45);
  --glow:rgba(79,70,229,.10);
  --canvas-op:0;            /* 日间模式：隐藏背景动画（Canvas 不显示，JS 同时停止绘制） */
  --mono-bg:linear-gradient(140deg,#4f46e5,#06b6d4);
  --mono-fg:#ffffff;
  --topbar:rgba(245,246,250,.92);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;min-height:100vh;color:var(--fg);overflow-x:hidden;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  -webkit-font-smoothing:antialiased;
  transition:background-color .4s var(--ease),color .4s var(--ease);
}
html[data-theme="dark"] body{
  background:
    radial-gradient(1000px 520px at 15% -8%, rgba(34,211,238,.16), transparent 62%),
    radial-gradient(900px 520px at 92% 4%, rgba(167,139,250,.18), transparent 60%),
    radial-gradient(800px 600px at 50% 115%, rgba(244,114,182,.10), transparent 60%),
    var(--bg);
}
html[data-theme="light"] body{
  background:
    radial-gradient(760px 420px at 8% -6%, rgba(79,70,229,.13), transparent 62%),
    radial-gradient(700px 420px at 98% 6%, rgba(6,182,212,.14), transparent 62%),
    var(--bg);
}
/* 昼间点阵底纹（纯 background-image，零渲染成本） */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:0;transition:opacity .4s;
  background-image:radial-gradient(rgba(20,26,46,.1) 1px,transparent 1px);background-size:26px 26px;
  -webkit-mask-image:linear-gradient(to bottom,#000,transparent 68%);
          mask-image:linear-gradient(to bottom,#000,transparent 68%);
}
html[data-theme="light"] body::before{opacity:1}

#neural{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none;opacity:var(--canvas-op);transition:opacity .4s}
.shell{position:relative;z-index:1;max-width:1160px;margin:0 auto;padding:0 24px 90px}

/* ================= 顶栏 ================= */
.topbar{
  display:flex;align-items:center;gap:18px;
  /* 水平不再内缩：与内容列 / 区块标题 / 页脚严格对齐（原 22px 内缩会整体右移） */
  padding:24px 0 18px;margin-bottom:30px;
  /*border-bottom:1px solid var(--line);   /* 常规 header bar 分隔线，与页脚 / 区块分隔线同色同宽 */
}
.brand{display:flex;align-items:center;gap:12px;margin-right:auto}
.brand .logo{width:38px;height:38px;color:var(--a1);filter:drop-shadow(0 0 10px var(--glow));flex:0 0 38px}
.brand b{display:block;font-size:16px;letter-spacing:.6px;line-height:1.25}
.brand span{display:block;font-size:10.5px;color:var(--muted);letter-spacing:2.4px;line-height:1.4}
.nav{display:flex;gap:4px}
.nav a{color:var(--muted);text-decoration:none;font-size:13px;padding:7px 14px;border-radius:99px;border:1px solid transparent;transition:.25s}
.nav a:hover{color:var(--fg);background:var(--panel);border-color:var(--line)}
.tag{font-size:11px;letter-spacing:1.1px;color:var(--a1);padding:6px 12px;border-radius:99px;
  border:1px solid var(--line-strong);background:var(--panel);white-space:nowrap}

/* 主题切换按钮 */
.theme-btn{
  display:inline-flex;align-items:center;gap:7px;cursor:pointer;
  padding:7px 12px 7px 8px;border-radius:99px;font-size:12.5px;color:var(--fg);
  border:1px solid var(--line-strong);background:var(--panel);
  box-shadow:var(--shadow);transition:.28s var(--ease);user-select:none;
}
.theme-btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift)}
.theme-btn .ic{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:var(--panel-hi);border:1px solid var(--line)}
.theme-btn svg{width:14px;height:14px;stroke:var(--a1);fill:none;stroke-width:1.8;stroke-linecap:round}
.theme-btn .sun{display:none}
html[data-theme="light"] .theme-btn .sun{display:block}
html[data-theme="light"] .theme-btn .moon{display:none}
html[data-theme="light"] .theme-btn .txt::after{content:"夜间"}
html[data-theme="dark"]  .theme-btn .txt::after{content:"日间"}

/* ================= Hero ================= */
.hero{padding:20px 0 46px;max-width:780px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);
  border:1px solid var(--line);background:var(--panel);padding:6px 14px;border-radius:99px;margin-bottom:20px;
}
.dot{width:7px;height:7px;border-radius:50%;background:var(--a1);box-shadow:0 0 0 0 var(--glow);animation:pulse 2.2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 9px transparent}100%{box-shadow:0 0 0 0 transparent}}
h1{font-size:clamp(28px,4.6vw,48px);line-height:1.2;margin:0 0 16px;font-weight:670;letter-spacing:-.5px}
.grad{background:linear-gradient(100deg,var(--a1),var(--a2) 55%,var(--a3));-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{margin:0;color:var(--muted);font-size:14.5px;line-height:1.85;max-width:640px}
.stats{display:flex;gap:26px;flex-wrap:wrap;margin-top:26px;padding-top:22px;border-top:1px solid var(--line)}
.stat b{display:block;font-size:26px;font-weight:700;letter-spacing:-.5px;line-height:1.1}
.stat span{font-size:12px;color:var(--muted)}

/* ================= 区块 ================= */
.sec{margin-top:36px}
.sec-head{display:flex;align-items:baseline;gap:12px;margin-bottom:18px}
.sec-head h2{margin:0;font-size:19px;font-weight:640;letter-spacing:.3px}
.sec-head small{color:var(--muted);font-size:11.5px;letter-spacing:1.4px}
.sec-head .ln{flex:1;height:1px;background:linear-gradient(90deg,var(--line),transparent)}

.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}

/* ================= 应用卡片 ================= */
.app{
  position:relative;display:block;text-decoration:none;color:inherit;padding:20px;border-radius:var(--r);
  border:1px solid var(--line);background:linear-gradient(160deg,var(--panel-hi),var(--panel));
  box-shadow:var(--shadow);overflow:hidden;
  /* 悬浮只改光影，不做位移 */
  transition:border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.app::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .3s;
  background:radial-gradient(340px circle at var(--mx,50%) var(--my,0%),var(--glow),transparent 62%);
}
.app:hover{border-color:var(--line-strong);box-shadow:var(--shadow-lift)}
.app:hover::after{opacity:1}
.app:focus-visible{outline:2px solid var(--a1);outline-offset:2px}
.ico{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;margin-bottom:14px;
  background:var(--panel-hi);border:1px solid var(--line-strong);color:var(--a1)}
.ico svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.app h3{margin:0 0 6px;font-size:15.5px;font-weight:640;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.app p{margin:0;color:var(--muted);font-size:12.8px;line-height:1.72;min-height:44px}
.badge{font-size:10.5px;padding:3px 8px;border-radius:99px;font-weight:600;letter-spacing:.4px}
.b-ready{color:var(--ok);border:1px solid currentColor;background:var(--ok-bg)}
.b-pending{color:var(--muted);border:1px solid var(--line-strong);background:var(--panel)}
.app.is-pending{border-style:dashed}
.app.is-pending .ico{color:var(--a2)}
.go{margin-top:16px;font-size:12.5px;color:var(--a1);display:inline-flex;align-items:center;gap:6px}

/* ================= 外链 ================= */
.links{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:12px}
.lk{display:flex;align-items:center;gap:13px;padding:14px 16px;border-radius:15px;text-decoration:none;color:inherit;
  border:1px solid var(--line);background:var(--panel);box-shadow:var(--shadow);transition:border-color .26s var(--ease),box-shadow .26s var(--ease)}
.lk:hover{border-color:var(--line-strong);box-shadow:var(--shadow-lift)}
.mono{width:34px;height:34px;flex:0 0 34px;border-radius:10px;display:grid;place-items:center;font-size:14px;font-weight:650;
  background:var(--mono-bg);color:var(--mono-fg)}
.lk-txt{min-width:0}
.lk-txt b{display:block;font-size:13.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lk-txt span{display:block;font-size:11.5px;color:var(--muted);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lk svg.ar{margin-left:auto;width:15px;height:15px;stroke:var(--muted);fill:none;stroke-width:1.8;stroke-linecap:round;transition:stroke .26s;flex:0 0 15px}
.lk:hover svg.ar{stroke:var(--a1)}

footer{margin-top:56px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:12px;display:flex;gap:14px;flex-wrap:wrap}

/* ================= Toast（沿用原站样式名） ================= */
.toast-notification{
  position:fixed;bottom:30px;left:50%;transform:translateX(-50%);
  background:var(--fg);color:var(--bg);padding:12px 24px;border-radius:10px;font-size:13.5px;
  box-shadow:0 6px 24px rgba(0,0,0,.25);z-index:2000;animation:toastIn .3s ease;pointer-events:none;
}
.toast-fadeout{animation:toastOut .3s ease forwards}
@keyframes toastIn{from{opacity:0;transform:translateX(-50%) translateY(20px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}
@keyframes toastOut{from{opacity:1;transform:translateX(-50%) translateY(0)}to{opacity:0;transform:translateX(-50%) translateY(-10px)}}

/* ================= 入场动画 ================= */
.rv{opacity:0}
.no-anim .rv{opacity:1}
@media (max-width:1080px){ .grid{grid-template-columns:repeat(3,1fr)} }
@media (max-width:820px){ .grid{grid-template-columns:repeat(2,1fr)} }
@media (max-width:760px){
  .nav{display:none}
  .tag{display:none}
  .shell{padding:0 16px 70px}
  .brand span{letter-spacing:1.6px}
  .topbar{padding:20px 0 14px}
}
@media (max-width:520px){ .grid{grid-template-columns:1fr} }
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .rv{opacity:1}
}