* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.auth-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
    width: 100%;
    max-width: 400px;
    padding: 40px 32px 32px;
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-logo {
    font-size: 1.6rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 6px;
}

.auth-logo span {
    color: #e94560;
}

.auth-subtitle {
    font-size: 0.85rem;
    color: #999;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    color: #555;
    margin-bottom: 6px;
    font-weight: 500;
}

.form-input {
    width: 100%;
    height: 44px;
    padding: 0 14px;
    border: 1.5px solid #e0e0e0;
    border-radius: 10px;
    font-size: 0.95rem;
    color: #333;
    background: #fafafa;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.form-input:focus {
    border-color: #e94560;
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.1);
    background: #fff;
}

.form-input::placeholder {
    color: #bbb;
}

.form-error {
    font-size: 0.8rem;
    color: #e94560;
    min-height: 20px;
    margin-top: 4px;
    visibility: hidden;
}

.form-error.visible {
    visibility: visible;
}

.btn-submit {
    width: 100%;
    height: 46px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #e94560, #d63851);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.1s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-submit:hover {
    opacity: 0.92;
}

.btn-submit:active {
    transform: scale(0.98);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2.5px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    display: none;
}

.btn-submit.loading .spinner {
    display: inline-block;
}

.btn-submit.loading .btn-text {
    display: none;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 0.85rem;
    color: #999;
}

.auth-footer a {
    color: #e94560;
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

.alert {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
    margin-bottom: 20px;
    display: none;
}

.alert.visible {
    display: block;
}

.alert-error {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

.alert-success {
    background: #f0fdf4;
    color: #16a34a;
    border: 1px solid #bbf7d0;
}

.alert-warning {
    background: #fffbeb;
    color: #d97706;
    border: 1px solid #fde68a;
}

.alert-btn {
    background: #e94560;
    color: #fff;
    border: none;
    padding: 4px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    margin-left: 8px;
}

.alert-btn:hover {
    background: #d63851;
}

/* ICP 备案号页脚（固定底部，不干扰居中卡片布局） */
.icp-footer {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 12px;
    text-align: center;
    z-index: 10;
}

.icp-footer a {
    font-size: 0.75rem;
    color: #999;
    text-decoration: none;
}

.icp-footer a:hover {
    color: #666;
    text-decoration: underline;
}