/* 登录页 */
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:'Microsoft YaHei',sans-serif; height:100vh; display:flex; align-items:center; justify-content:center;
       background:linear-gradient(135deg,#667eea 0%,#764ba2 100%); }
.login-box { background:#fff; border-radius:12px; padding:40px; width:380px; box-shadow:0 20px 60px rgba(0,0,0,.3); }
.login-box h1 { text-align:center; font-size:24px; color:#333; margin-bottom:8px; }
.login-box .sub { text-align:center; color:#999; font-size:13px; margin-bottom:30px; }
.field { margin-bottom:20px; }
.field label { display:block; font-size:13px; color:#666; margin-bottom:6px; }
.field input { width:100%; padding:11px 14px; border:1px solid #ddd; border-radius:6px; font-size:14px; outline:none; }
.field input:focus { border-color:#667eea; }
.btn { width:100%; padding:12px; background:#667eea; color:#fff; border:none; border-radius:6px; font-size:15px; cursor:pointer; }
.btn:hover { background:#5a6fd6; }
.error { background:#fdecea; color:#d9534f; padding:10px 14px; border-radius:6px; font-size:13px; margin-bottom:16px; }