:root {
    /* 颜色变量 */
    --primary-gold: #d4af37;
    --primary-red: #d32f2f;
    --text-primary: #333333;
    --text-secondary: #666666;
    --background: #f5f5f5;
    --surface: #ffffff;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Serif SC', serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    min-height: 100vh;
}

/* 页面容器 */
.page-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)),
                url('../assets/temple-bg.jpg') center/cover no-repeat fixed;
}

/* 内容包装器 */
.content-wrapper {
    flex: 1;
    max-width: 800px;
    margin: 0 auto;
    padding: calc(var(--spacing-xl) * 2) var(--spacing-lg) var(--spacing-lg);
    width: 100%;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 返回按钮 */
.back-button {
    position: absolute;
    top: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50px;
    color: var(--text-primary);
    text-decoration: none;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.back-button:hover {
    background: white;
    transform: translateX(-50%) translateY(-2px);
    box-shadow: var(--shadow-md);
}

.back-button .material-icons {
    font-size: 1.2rem;
}

/* 主卡片容器 */
.main-card {
    width: 100%;
    max-width: 500px;
    background: rgba(255, 255, 255, 0.98);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    margin: var(--spacing-xl) auto;
    position: relative;
    overflow: hidden;
}

/* 页面标题 */
.page-title {
    text-align: center;
    color: var(--primary-gold);
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.title-decoration {
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-gold), transparent);
    margin: var(--spacing-sm) auto;
}

.page-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
}

/* 表单样式 */
.registration-form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.form-group {
    width: 100%;
    max-width: 400px;
    text-align: center;
}

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

.required {
    color: var(--primary-red);
    margin-left: 4px;
}

.optional {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-left: 4px;
}

.input-wrapper {
    position: relative;
    margin: 0 auto;
    width: 100%;
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid #e0e0e0;
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-gold);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.1);
}

.input-hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
    text-align: center;
}

/* 提交按钮 */
.submit-button {
    width: 100%;
    max-width: 400px;
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(45deg, var(--primary-gold), #ffd700);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.submit-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.submit-button .material-icons {
    font-size: 1.2rem;
}

/* 页脚 */
.page-footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: white;
    font-size: 1.1rem;
    margin-top: auto;
}

/* 错误和成功状态 */
.form-input.error {
    border-color: var(--primary-red);
    animation: shake 0.3s ease-in-out;
}

.form-input.success {
    border-color: #4caf50;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* 加载状态 */
.submit-button.loading {
    pointer-events: none;
    opacity: 0.8;
}

.submit-button.loading .material-icons {
    animation: rotate 1s linear infinite;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .content-wrapper {
        padding: calc(var(--spacing-xl) * 2) var(--spacing-sm) var(--spacing-sm);
        width: 100%;
    }

    .main-card {
        padding: var(--spacing-lg);
        margin: var(--spacing-lg) 0;
        width: 100%;
        border-radius: var(--radius-md);
    }

    .back-button {
        top: var(--spacing-sm);
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 0.9rem;
    }

    .page-title {
        font-size: 1.75rem;
    }

    .page-subtitle {
        font-size: 1rem;
        padding: 0 var(--spacing-sm);
    }

    .form-group {
        width: 100%;
    }

    .form-label {
        font-size: 1rem;
    }

    .form-input {
        font-size: 16px; /* 防止iOS自动缩放 */
        padding: var(--spacing-sm);
        height: 44px; /* 适合手指触摸的最小高度 */
    }

    .input-hint {
        font-size: 0.8rem;
    }

    .submit-button {
        width: 100%;
        height: 44px;
        font-size: 1rem;
    }
}

/* 小屏幕适配 */
@media (max-width: 360px) {
    .content-wrapper {
        padding-top: calc(var(--spacing-xl) + var(--spacing-lg));
    }

    .main-card {
        padding: var(--spacing-md);
    }

    .back-button {
        font-size: 0.85rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .page-title {
        font-size: 1.5rem;
    }

    .form-label {
        font-size: 0.9rem;
    }

    .form-input {
        font-size: 15px;
    }
}

/* 成功对话框 */
.success-dialog {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.success-dialog.active {
    display: flex;
}

.success-dialog .dialog-content {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    max-width: 400px;
    width: 90%;
    animation: slideDown 0.3s ease;
}

.success-dialog .success-icon {
    width: 80px;
    height: 80px;
    background: var(--primary-gold);
    border-radius: 50%;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.success-dialog .success-icon .material-icons {
    font-size: 40px;
    color: white;
}

.success-dialog h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

/* 通知消息 */
.notification {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    animation: slideUp 0.3s ease;
    z-index: 1000;
}

.notification.error {
    background: var(--primary-red);
}

@keyframes slideUp {
    from { transform: translate(-50%, 100%); opacity: 0; }
    to { transform: translate(-50%, 0); opacity: 1; }
}

@keyframes slideDown {
    from { transform: translateY(-20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}