/* 核心变量：纯白+冷蓝色调+高明亮度 */
:root {
    --color-primary: #4f86f7;      /* 冷蓝色主调 */
    --color-primary-light: #70a1ff;/* 浅冷蓝 */
    --color-primary-dark: #3b74e3; /* 深冷蓝 */
    --color-secondary: #0ea5e9;
    --color-accent: #f59e0b;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-dark: #2d3748;         /* 深灰色文本（提高可读性） */
    --color-gray: #718096;         /* 中灰色 */
    --color-light: #ffffff;        /* 纯白背景 */
    --color-white: #ffffff;
    --color-light-bg: rgba(79, 134, 247, 0.05); /* 极浅冷蓝背景 */
    --gradient-primary: linear-gradient(135deg, #4f86f7, #70a1ff); /* 冷蓝渐变 */
    --gradient-primary-hover: linear-gradient(135deg, #3b74e3, #5b8def);
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--color-light); /* 纯白背景 */
    color: var(--color-dark);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding: 30px 0;
    min-height: 100vh;
}

::selection {
    background-color: rgba(79, 134, 247, 0.15); /* 冷蓝选中文本背景 */
    color: var(--color-primary-dark);
}

/* 美化滚动条 - 冷蓝色调 */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--color-light);
}
::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-dark);
}

.container {
    max-width: 500px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 全局内联提示 */
.global-message {
    display: none;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    align-items: center;
    gap: 8px;
    width: 100%;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}
.global-message.show {
    display: flex;
    animation: fadeIn 0.3s ease;
}
.global-message.success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}
.global-message.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}
.global-message.warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
}
.global-message.info {
    background-color: var(--color-light-bg);
    color: var(--color-primary);
    border: 1px solid rgba(79, 134, 247, 0.2);
}

/* 页面头部 */
.page-header {
    padding: 0 0 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.product-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-dark);
    display: flex;
    align-items: center;
    gap: 10px;
}
.back-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--color-light);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    padding: 8px 20px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-fast);
    font-size: 0.9rem;
}
.back-btn:hover {
    background: var(--color-light-bg);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
}

/* 表单内容区 */
.form-content {
    width: 100%;
}

/* 表单组 */
.form-group {
    margin-bottom: 20px;
}
.input-group {
    display: flex;
    align-items: center;
    background: var(--color-white);
    border: 1px solid var(--color-light-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-fast);
}
.input-group:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 134, 247, 0.1);
}

/* 输入标签 */
.input-label {
    width: 100px;
    padding: 16px 20px;
    background: var(--color-light-bg);
    border-right: 1px solid var(--color-light-bg);
    font-weight: 600;
    color: var(--color-gray);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 输入框 */
.input-field {
    flex: 1;
    padding: 16px 20px;
    background: transparent;
    border: none;
    outline: none;
    color: var(--color-dark);
    font-size: 1rem;
    font-family: inherit;
}
.input-field:disabled {
    color: var(--color-gray);
    background: rgba(0, 0, 0, 0.01);
}
.input-field::placeholder {
    color: var(--color-gray);
    opacity: 0.7;
}

/* 时间输入组 */
.time-input-group {
    border-color: var(--color-primary);
}
.time-unit {
    padding: 0 20px;
    color: var(--color-gray);
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
}

/* 价格显示 */
.price-display {
    background: var(--gradient-primary);
    border-color: transparent;
}
.price-display .input-label {
    background: rgba(255, 255, 255, 0.1);
    border-right-color: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
}
.price-display .input-field {
    color: var(--color-white);
    font-weight: 700;
}
.total-price {
    font-size: 1.2rem;
    color: var(--color-white) !important;
}

/* 提交按钮 */
.submit-btn {
    width: 100%;
    padding: 16px;
    background: var(--gradient-primary);
    color: var(--color-white);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1.1rem;
    font-weight: 700;
    transition: var(--transition-fast);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    cursor: pointer;
    margin-top: 8px;
}
.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: var(--gradient-primary-hover);
}
.submit-btn:disabled {
    opacity: 0.7;
    transform: none;
    box-shadow: var(--shadow-sm);
    cursor: not-allowed;
}

/* 提示文本 */
.info-text {
    margin-top: 20px;
    padding: 16px 20px;
    background: var(--color-light-bg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
    color: var(--color-gray);
    font-size: 0.9rem;
    line-height: 1.6;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}
.info-text i {
    color: var(--color-primary);
    font-size: 1rem;
    margin-top: 2px;
}

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.loading-icon {
    animation: spin 1s linear infinite;
}

/* 响应式适配 */
@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    .product-name {
        font-size: 1.3rem;
    }
    .back-btn {
        align-self: stretch;
    }
    .input-label {
        width: 80px;
        padding: 12px 15px;
        font-size: 0.85rem;
    }
    .input-field {
        padding: 12px 15px;
        font-size: 0.95rem;
    }
    .time-unit {
        padding: 0 15px;
        font-size: 0.85rem;
    }
}