/**
 * 登录页样式
 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Plus Jakarta Sans', 'Microsoft YaHei', -apple-system, sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #0f172a;
    position: relative;
    overflow: hidden;
}
body::before {
    content: '';
    position: absolute;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(99,102,241,0.3), transparent 70%);
    top: -200px; right: -100px;
}
body::after {
    content: '';
    position: absolute;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(139,92,246,0.2), transparent 70%);
    bottom: -150px; left: -100px;
}
.login-container {
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 48px 40px;
    border-radius: 18px;
    width: 420px;
    text-align: center;
    position: relative;
    z-index: 1;
    box-shadow: 0 25px 50px rgba(0,0,0,0.3);
}
.logo-icon {
    width: 64px; height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 8px 24px rgba(99,102,241,0.4);
}
h1 { color: white; margin-bottom: 8px; font-size: 22px; font-weight: 800; letter-spacing: -0.5px; }
.subtitle { color: rgba(255,255,255,0.5); font-size: 14px; margin-bottom: 32px; }
.form-group { margin-bottom: 16px; text-align: left; }
label { display: block; margin-bottom: 6px; color: rgba(255,255,255,0.6); font-weight: 600; font-size: 13px; }
input[type="text"], input[type="password"] {
    width: 100%; padding: 12px 16px;
    background: rgba(255,255,255,0.08);
    border: 1.5px solid rgba(255,255,255,0.12);
    border-radius: 10px; font-size: 15px; color: white;
    transition: all 0.2s;
}
input::placeholder { color: rgba(255,255,255,0.3); }
input:focus { outline: none; border-color: #6366f1; background: rgba(255,255,255,0.1); box-shadow: 0 0 0 3px rgba(99,102,241,0.2); }
.login-btn {
    width: 100%; padding: 12px;
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: white; border: none; border-radius: 10px;
    font-size: 15px; font-weight: 700; cursor: pointer;
    transition: all 0.2s; margin-top: 8px;
    box-shadow: 0 4px 12px rgba(99,102,241,0.3);
}
.login-btn:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(99,102,241,0.4); }
.login-btn:active { transform: scale(0.98); }
.login-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.login-btn-text { display: inline-block; }
.login-spinner {
    display: inline-block;
    width: 14px; height: 14px;
    border: 2px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-right: 6px;
    vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }
.error-msg { color: #f87171; margin-top: 12px; font-size: 13px; display: none; font-weight: 600; }
.security-notice {
    margin-top: 28px; padding: 14px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 10px; font-size: 12px; color: rgba(255,255,255,0.35);
    text-align: left; line-height: 1.6;
}