*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
  :root{--bg:#f5f7fa;--surface:#fff;--card:#fff;--border:#e4e7ed;--text:#303133;--text2:#909399;--accent:#409eff;--accent2:#67c23a;--warn:#e6a23c;--danger:#f56c6c;--pink:#e0409e;--purple:#7c3aed;--radius:8px;--font:system-ui,sans-serif;--mono:'Fira Code',Consolas,monospace}
  html{font-size:15px}
  body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100vh;display:flex}
  .sidebar{width:200px;background:var(--surface);border-right:1px solid var(--border);position:fixed;top:0;left:0;bottom:0;z-index:100;display:flex;flex-direction:column;transition:transform .3s}
  .sidebar-header{padding:18px 16px 12px;border-bottom:1px solid var(--border)}
  .sidebar-header h1{font-size:1.05rem;font-weight:700}
  .sidebar-header h1 span{color:var(--accent)}
  .sidebar-header p{font-size:.72rem;color:var(--text2);margin-top:2px}
  .nav-list{flex:1;overflow-y:auto;padding:6px 0}
  .nav-item{display:flex;align-items:center;gap:8px;padding:7px 16px;cursor:pointer;color:var(--text2);font-size:.82rem;transition:all .12s;border-left:3px solid transparent}
  .nav-item:hover{color:var(--text);background:rgba(64,158,255,.04)}
  .nav-item.active{color:var(--accent);background:rgba(64,158,255,.08);border-left-color:var(--accent);font-weight:600}
  .nav-item .icon{flex-shrink:0;width:20px;text-align:center}
  .nav-divider{padding:6px 16px 2px;font-size:.7rem;color:var(--text2);font-weight:600;letter-spacing:.5px}
  a.nav-link{display:flex;align-items:center;gap:8px;padding:7px 16px;color:var(--text2);font-size:.82rem;text-decoration:none;border-left:3px solid transparent;transition:all .12s}
  a.nav-link:hover{color:var(--text);background:rgba(64,158,255,.04)}
  a.nav-link.active{color:var(--accent);background:rgba(64,158,255,.08);border-left-color:var(--accent);font-weight:600}
  .main{margin-left:200px;flex:1;min-height:100vh;display:flex;flex-direction:column}
  .content{flex:1;padding:20px 24px;max-width:1200px;width:100%;margin:0 auto}
  .tool-pane{display:none;animation:fadeIn .2s ease}
  .tool-pane.active{display:block}
  @keyframes fadeIn{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}
  .card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;margin-bottom:14px}
  .card h2{font-size:1rem;font-weight:600;margin-bottom:10px;color:var(--text)}
  .card-row{display:flex;gap:10px;flex-wrap:wrap}.card-row>*{flex:1;min-width:160px}
  label{display:block;font-size:.78rem;color:var(--text2);margin-bottom:3px;font-weight:500}
  textarea,.input,.select{width:100%;padding:7px 10px;background:var(--surface);border:1px solid var(--border);border-radius:5px;color:var(--text);font-size:.85rem;font-family:var(--mono);outline:none;transition:border .15s}
  textarea:focus,.input:focus,.select:focus{border-color:var(--accent)}textarea{min-height:60px;font-size:.8rem}
  .select{font-family:var(--font);cursor:pointer}.btn{display:inline-flex;align-items:center;gap:5px;padding:6px 14px;border:none;border-radius:5px;cursor:pointer;font-size:.82rem;font-weight:500;transition:all .12s}
  .btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{filter:brightness(1.08)}.btn-success{background:var(--accent2);color:#fff}
  .btn-dream{background:var(--purple);color:#fff}.btn-love{background:var(--pink);color:#fff}
  .btn-outline{background:transparent;border:1px solid var(--border);color:var(--text2)}.btn-outline:hover{background:var(--surface);color:var(--text)}
  .btn-group{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}
  .output{background:var(--surface);border:1px solid var(--border);border-radius:5px;padding:8px 12px;font-family:var(--font);font-size:.8rem;line-height:1.6;min-height:34px;word-break:break-all;margin-top:6px}
  .output.success{border-color:var(--accent2)}.output.error{border-color:var(--danger);color:var(--danger)}
  .output.pink{border-color:var(--pink)}.output.purple{border-color:var(--purple)}
  .hint{font-size:.75rem;color:var(--text2);margin-top:3px}
  .grid-2{display:grid;grid-template-columns:1fr 1fr;gap:10px}@media(max-width:700px){.grid-2{grid-template-columns:1fr}}
  @media(max-width:768px){.sidebar{transform:translateX(-100%)}.sidebar.open{transform:translateX(0)}.main{margin-left:0}.content{padding:14px}}
  .footer{text-align:center;padding:14px;font-size:.75rem;color:var(--text2);border-top:1px solid var(--border);margin-top:auto;background:var(--surface)}
  .footer a{color:var(--text2)}.footer a:hover{color:var(--accent)}.mt-6{margin-top:6px}.mb-6{margin-bottom:6px}
  .result-bar{display:flex;align-items:center;justify-content:space-between;margin-top:4px}
  .score-big{font-size:2rem;font-weight:700;text-align:center;padding:6px 0;line-height:1.2}
  .score-big.good{color:var(--accent2)}.score-big.mid{color:var(--warn)}.score-big.bad{color:var(--danger)}
  .star{color:#f7ba2a;font-size:1.1rem}
.donation-btn:hover{color:#409eff;border-color:#409eff}


.donation-btn:hover{color:#409eff;border-color:#409eff}

.donation-modal.show{display:flex}
.donation-box{background:#fff;border-radius:10px;padding:14px 18px;text-align:center;max-width:240px;width:85%;box-shadow:0 4px 20px rgba(0,0,0,.12);position:relative;animation:fadeIn .2s ease}
.donation-box .title{font-size:.85rem;font-weight:600;color:#303133;margin-bottom:4px}
.donation-box .desc{font-size:.75rem;color:#909399;margin-bottom:10px;line-height:1.4}
.donation-box img{max-width:150px;border-radius:6px;margin-bottom:6px}
.donation-box .hint{font-size:.65rem;color:#c0c4cc}
.donation-box .close-btn{background:none;border:none;font-size:.9rem;color:#c0c4cc;cursor:pointer;position:absolute;top:5px;right:8px}
.donation-box .close-btn:hover{color:#909399}


.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:10px;margin:16px 0}
.tool-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:14px 16px;display:block;text-decoration:none;color:var(--text);transition:all .15s}
.tool-card:hover{border-color:var(--accent);box-shadow:0 2px 12px rgba(64,158,255,.1);transform:translateY(-1px)}
.tool-card h3{font-size:.9rem;font-weight:600;margin:0}
.tool-card p{font-size:.78rem;color:var(--text2);margin:4px 0 0}