/* 登录页 - 可缓存 */
body { display: flex; align-items: center; justify-content: center; overflow: hidden; }
.bg-effects::before {
    content: ''; position: absolute; width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
    top: -200px; right: -200px; animation: float 15s ease-in-out infinite;
}
.bg-effects::after {
    content: ''; position: absolute; width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(123, 44, 191, 0.1) 0%, transparent 70%);
    bottom: -150px; left: -150px; animation: float 20s ease-in-out infinite reverse;
}
@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, 30px); }
}
.login-container { position: relative; z-index: 1; width: 100%; max-width: 420px; padding: 20px; }
.login-card {
    background: var(--card-bg); backdrop-filter: blur(20px); border-radius: 24px;
    border: 1px solid rgba(0, 212, 255, 0.1); padding: 40px; box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}
.login-header { text-align: center; margin-bottom: 35px; }
.login-logo {
    font-family: 'Orbitron', sans-serif; font-size: 2rem; font-weight: 700;
    background: var(--gradient-2); -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text; margin-bottom: 10px;
}
.login-subtitle { color: var(--text-muted); font-size: 0.95rem; }
.form-group { margin-bottom: 20px; }
.form-label { display: block; margin-bottom: 8px; color: var(--text); font-weight: 500; font-size: 0.9rem; }
.form-input {
    width: 100%; padding: 14px 16px; background: rgba(15, 23, 42, 0.6); border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 12px; color: var(--text); font-size: 1rem; transition: all 0.3s ease;
}
.form-input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1); }
.form-input::placeholder { color: var(--text-muted); }
.input-icon-wrapper .form-input { padding-left: 45px; }
.input-icon-wrapper i { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--text-muted); font-size: 1rem; }
.remember-group { margin-bottom: 15px; }
.remember-label { display: flex; align-items: center; cursor: pointer; user-select: none; font-size: 0.9rem; color: var(--text-muted); }
.remember-label input[type="checkbox"] { display: none; }
.remember-label .checkmark {
    width: 18px; height: 18px; border: 2px solid rgba(0, 212, 255, 0.4); border-radius: 4px;
    margin-right: 10px; position: relative; transition: all 0.2s ease;
}
.remember-label input:checked + .checkmark { background: var(--primary); border-color: var(--primary); }
.remember-label input:checked + .checkmark::after {
    content: ''; position: absolute; left: 5px; top: 2px; width: 5px; height: 9px;
    border: solid white; border-width: 0 2px 2px 0; transform: rotate(45deg);
}
.remember-label:hover .checkmark { border-color: var(--primary); }
.login-btn {
    width: 100%; padding: 14px; background: var(--gradient-2); border: none; border-radius: 12px;
    color: white; font-size: 1rem; font-weight: 600; cursor: pointer; transition: all 0.3s ease;
    display: flex; align-items: center; justify-content: center; gap: 8px;
}
.login-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3); }
.login-btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.login-btn .spinner {
    width: 20px; height: 20px; border: 2px solid rgba(255, 255, 255, 0.3); border-top-color: white;
    border-radius: 50%; animation: spin 0.8s linear infinite; display: none;
}
.login-btn.loading .spinner { display: block; }
.login-btn.loading .btn-text { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }
.error-message {
    background: rgba(239, 68, 68, 0.1); border: 1px solid rgba(239, 68, 68, 0.3); border-radius: 10px;
    padding: 12px 16px; margin-bottom: 20px; color: var(--error); font-size: 0.9rem;
    display: none; align-items: center; gap: 10px;
}
.error-message.show { display: flex; }
.login-footer { text-align: center; margin-top: 25px; padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, 0.1); }
.login-footer p { color: var(--text-muted); font-size: 0.85rem; }
.features { display: flex; justify-content: center; gap: 30px; margin-top: 15px; }
.feature-item { display: flex; align-items: center; gap: 6px; color: var(--text-muted); font-size: 0.8rem; }
.feature-item i { color: var(--primary); }
.qq-group {
    margin-top: 25px; padding: 16px 20px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(120, 0, 255, 0.1));
    border: 1px solid rgba(0, 212, 255, 0.3); border-radius: 12px; text-align: center;
}
.qq-group-title { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 8px; display: flex; align-items: center; justify-content: center; gap: 6px; }
.qq-group-number {
    font-size: 1.2rem; font-weight: 600; color: var(--primary); letter-spacing: 2px;
    cursor: pointer; transition: all 0.3s ease; padding: 8px 16px; border-radius: 8px; display: inline-block;
}
.qq-group-number:hover { background: rgba(0, 212, 255, 0.15); transform: scale(1.05); }
.qq-copy-hint { font-size: 0.75rem; color: var(--text-muted); margin-top: 6px; opacity: 0.8; }
.copy-toast {
    position: fixed; top: 20px; left: 50%; transform: translateX(-50%) translateY(-100px);
    background: linear-gradient(135deg, #00d4ff, #7800ff); color: white; padding: 12px 24px;
    border-radius: 10px; box-shadow: 0 8px 20px rgba(0, 212, 255, 0.4); font-size: 0.9rem; font-weight: 600;
    opacity: 0; transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55); z-index: 10000; pointer-events: none;
}
.copy-toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
@media (max-width: 480px) {
    .login-card { padding: 30px 25px; }
    .login-logo { font-size: 1.6rem; }
    .features { flex-direction: column; gap: 10px; align-items: center; }
}