/* 苹果风格登录页面 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    background: #f5f5f7;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: #1d1d1f;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-box {
    background: #ffffff;
    border-radius: 18px;
    padding: 48px 40px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    backdrop-filter: blur(20px);
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-header h1 {
    font-size: 32px;
    font-weight: 600;
    color: #1d1d1f;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.login-header .subtitle {
    font-size: 14px;
    color: #86868b;
    font-weight: 400;
    letter-spacing: 0.2px;
}

.login-form {
    width: 100%;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: #1d1d1f;
    margin-bottom: 8px;
    letter-spacing: -0.1px;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    font-size: 17px;
    color: #1d1d1f;
    background: #f5f5f7;
    border: 1px solid transparent;
    border-radius: 12px;
    transition: all 0.2s ease;
    outline: none;
    font-family: inherit;
}

.form-group input:focus {
    background: #ffffff;
    border-color: #007aff;
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

.form-group input::placeholder {
    color: #86868b;
}

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

.captcha-input-wrapper {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.captcha-input-wrapper input {
    flex: 1;
}

.captcha-display {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 16px;
    background: #f5f5f7;
    border-radius: 12px;
    min-width: 120px;
    justify-content: center;
}

.captcha-display:hover {
    background: #e8e8ed;
}

#captchaCode {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 4px;
    color: #1d1d1f;
    font-family: 'Courier New', monospace;
    user-select: none;
}

.refresh-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #86868b;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.refresh-btn:hover {
    background: rgba(0, 0, 0, 0.05);
    color: #1d1d1f;
}

.refresh-btn:active {
    transform: rotate(90deg);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    font-size: 14px;
}

.remember-me {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: #1d1d1f;
}

.remember-me input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #007aff;
}

.forgot-password {
    color: #007aff;
    text-decoration: none;
    font-size: 14px;
    transition: opacity 0.2s ease;
}

.forgot-password:hover {
    opacity: 0.7;
    text-decoration: underline;
}

.login-btn {
    width: 100%;
    padding: 16px;
    background: #007aff;
    color: #ffffff;
    border: none;
    border-radius: 12px;
    font-size: 17px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
    position: relative;
    min-height: 50px;
}

.login-btn:hover {
    background: #0051d5;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.login-btn:active {
    transform: translateY(0);
}

.login-btn:disabled {
    background: #86868b;
    cursor: not-allowed;
    transform: none;
}

.btn-loader {
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-loader svg {
    animation: rotate 1s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.form-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid #f5f5f7;
}

.form-footer .back-to-login {
    color: #007aff;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: opacity 0.2s ease;
}

.form-footer .back-to-login:hover {
    opacity: 0.7;
}

.form-hint {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: #86868b;
    line-height: 1.4;
}

.error-message {
    display: none;
    margin-top: 20px;
    padding: 12px 16px;
    background: #ff3b30;
    color: #ffffff;
    border-radius: 12px;
    font-size: 14px;
    text-align: center;
    animation: slideDown 0.3s ease;
}

.success-message {
    display: none;
    margin-top: 20px;
    padding: 12px 16px;
    background: #34c759;
    color: #ffffff;
    border-radius: 12px;
    font-size: 14px;
    text-align: center;
    animation: slideDown 0.3s ease;
    line-height: 1.5;
}

.success-message a {
    color: #ffffff;
    text-decoration: underline;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 480px) {
    .login-box {
        padding: 32px 24px;
    }

    .login-header h1 {
        font-size: 28px;
    }

    .form-group input,
    .captcha-display {
        padding: 12px 14px;
        font-size: 16px;
    }
}