/* 基础样式重置与变量定义 */
:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #f9fafb;
    --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --card-radius: 12px;
    --transition: all 0.3s ease;
    --text-color: #1f2937;
    --text-secondary: #6b7280;
    --error-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
}

/* 主容器样式 */
.registration-container {
    max-width: 500px;
    margin: 0 auto;
    padding: 30px 15px 100px;
    color: var(--text-color);
}

/* 头部样式 */
.registration-header {
    text-align: center;
    margin-bottom: 30px;
}

.registration-title {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.registration-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* 注册表单样式 */
.registration-form {
    background: white;
    border-radius: var(--card-radius);
    box-shadow: var(--card-shadow);
    padding: 30px;
    margin-bottom: 30px;
    transition: var(--transition);
}

    .registration-form:hover {
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    }

/* 表单组样式 */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

/* 输入框样式 */
.input-with-icon {
    position: relative;
}

    .input-with-icon i {
        position: absolute;
        left: 15px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--text-secondary);
        font-size: 1.1rem;
    }

    .input-with-icon input {
        width: 100%;
        padding: 12px 15px 12px 45px;
        border: 1px solid #e5e7eb;
        border-radius: 6px;
        font-size: 1rem;
        transition: var(--transition);
        background-color: #f9fafb;
    }

        .input-with-icon input:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
        }

/* 验证码组样式 */
.captcha-group, .sms-group {
    display: flex;
    gap: 10px;
}

    .captcha-group .input-with-icon {
        flex: 1;
    }

.captcha-image {
    width: 120px;
    height: 60px;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid #e5e7eb;
    background: #f9fafb;
    cursor: pointer;
    transition: var(--transition);
}

    .captcha-image:hover {
        border-color: var(--primary-color);
    }

    .captcha-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

/* 短信验证码按钮 */
.sms-button {
    width: 120px;
    border: none;
    border-radius: 6px;
    background: var(--primary-color);
    color: white;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

    .sms-button:hover {
        background: var(--primary-hover);
    }

    .sms-button[disabled] {
        background: var(--text-secondary);
        cursor: not-allowed;
    }

/* 错误提示样式 */
.error-message {
    color: var(--error-color);
    font-size: 0.8rem;
    margin-top: 5px;
    display: none;
}

    .error-message.visible {
        display: block;
    }

input:invalid {
    border-color: var(--error-color);
}

input:valid {
    border-color: #10b981;
}

/* 协议复选框样式 */
.agreement-group {
    display: flex;
    align-items: center;
    margin: 25px 0;
}

    .agreement-group input[type="checkbox"] {
        appearance: none;
        width: 18px;
        height: 18px;
        border: 2px solid #e5e7eb;
        border-radius: 4px;
        margin-right: 8px;
        position: relative;
        transition: var(--transition);
        cursor: pointer;
    }

        .agreement-group input[type="checkbox"]:checked {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }

            .agreement-group input[type="checkbox"]:checked::after {
                content: '✓';
                position: absolute;
                top: 50%;
                left: 50%;
                transform: translate(-50%, -50%);
                color: white;
                font-size: 0.8rem;
                font-weight: bold;
            }

.agreement-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.agreement-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

    .agreement-link:hover {
        color: var(--primary-hover);
        text-decoration: underline;
    }

/* 按钮样式 */
.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.btn-primary, .btn-secondary {
    flex: 1;
    padding: 12px;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
}

    .btn-primary:hover {
        background: var(--primary-hover);
    }

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

    .btn-secondary:hover {
        background: #f0f5ff;
    }

/* 页脚样式 */
.registration-footer {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.login-link {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

    .login-link:hover {
        color: var(--primary-hover);
        text-decoration: underline;
    }

/* 模态对话框样式 */
.modal-dialog {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

    .modal-dialog[open] {
        opacity: 1;
        visibility: visible;
    }

.modal-content {
    background: white;
    border-radius: var(--card-radius);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin: 0;
}

.close-button {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
}

    .close-button:hover {
        color: var(--primary-color);
    }

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.scroll-content {
    font-size: 0.9rem;
    line-height: 1.6;
}

    .scroll-content h3, .scroll-content h4 {
        color: var(--primary-color);
        margin: 1em 0 0.5em;
    }

    .scroll-content ul {
        padding-left: 20px;
    }

    .scroll-content li {
        margin-bottom: 0.5em;
    }

.modal-footer {
    padding: 15px 20px;
    border-top: 1px solid #e5e7eb;
    text-align: right;
}

.confirm-button {
    padding: 8px 20px;
    border-radius: 6px;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

    .confirm-button:hover {
        background: var(--primary-hover);
    }

/* 响应式调整 */
@media (min-width: 768px) {
    .registration-container {
        padding: 40px 20px 120px;
    }

    .registration-title {
        font-size: 2.1rem;
    }

    .registration-subtitle {
        font-size: 1.1rem;
    }

    .registration-form {
        padding: 40px;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.registration-form {
    animation: fadeIn 0.4s ease forwards;
}

/* 按钮悬停效果 */
.btn-primary, .btn-secondary {
    position: relative;
    overflow: hidden;
}

    .btn-primary::after, .btn-secondary::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 5px;
        height: 5px;
        background: rgba(255, 255, 255, 0.5);
        opacity: 0;
        border-radius: 100%;
        transform: scale(1, 1) translate(-50%);
        transform-origin: 50% 50%;
    }

    .btn-primary:hover::after, .btn-secondary:hover::after {
        animation: ripple 0.6s ease-out;
    }

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }

    100% {
        transform: scale(20, 20);
        opacity: 0;
    }
}

/* 短信验证码倒计时样式 */
.sms-button.countdown {
    background: var(--text-secondary);
    color: white;
}

/* 无障碍优化 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* 输入框焦点样式 */
input:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}