*{margin:0;padding:0;box-sizing:border-box;font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial}
body{min-height:100vh;background:linear-gradient(135deg,#1e293b,#0f172a);display:flex;align-items:center;justify-content:center;padding:20px}
/* 毛玻璃核心 */
.glass{background:rgba(255,255,255,0.1);backdrop-filter:blur(20px) saturate(180%);-webkit-backdrop-filter:blur(20px);border:1px solid rgba(255,255,255,0.2);border-radius:20px;box-shadow:0 8px 32px rgba(0,0,0,0.2);padding:35px;width:100%;max-width:650px}
.logo{width:130px;margin:0 auto 25px;display:block;border-radius:12px}
.title{text-align:center;color:#fff;font-size:26px;margin-bottom:8px}
.sub-title{text-align:center;color:#cbd5e1;font-size:14px;margin-bottom:30px}
.form-item{margin-bottom:22px}
.form-item label{display:block;margin-bottom:8px;color:#e2e8f0;font-weight:500}
.form-item input,.form-item select{width:100%;padding:14px;background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.15);border-radius:12px;color:#fff;outline:none;font-size:15px}
.form-item input::placeholder{color:#94a3b8}
.btn{width:100%;padding:15px;border:none;border-radius:12px;background:#3b82f6;color:#fff;font-size:16px;cursor:pointer;transition:.3s}
.btn:hover{background:#2563eb}
.btn-danger{background:#ef4444}
.btn-danger:hover{background:#dc2626}
.btn-success{background:#10b981}
.btn-success:hover{background:#059669}
/* 面板菜单 */
.panel-menu{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;margin:30px 0}
.panel-menu a{padding:16px;text-align:center;background:rgba(255,255,255,0.08);border-radius:12px;color:#f1f5f9;text-decoration:none}
/* 账单样式 */
.bill-box{margin-top:20px}
.bill-item{padding:16px;border-bottom:1px solid rgba(255,255,255,0.1);color:#e2e8f0}
.bill-item span{color:#3b82f6;font-weight:600}
/* 数字键盘 */
.keyboard{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:25px}
.keyboard button{padding:18px;border:none;border-radius:12px;background:rgba(255,255,255,0.1);color:#fff;font-size:20px;cursor:pointer}
.keyboard button:hover{background:rgba(255,255,255,0.2)}
/* 弹窗 */
.modal{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.5);display:flex;align-items:center;justify-content:center}
.modal .glass{max-width:400px}
/* 隐藏项 */
.hide{display:none}