/* ==================== 全局样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Professional Blue 配色 */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    
    /* 背景色 - 白色背景 */
    --bg-gradient-start: #ffffff;
    --bg-gradient-end: #f8fafc;
    --card-bg: rgba(255, 255, 255, 0.95);
    --card-border: rgba(37, 99, 235, 0.1);
    --card-border-hover: rgba(37, 99, 235, 0.2);
    
    /* 文字颜色 - 黑色字体 */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-hint: #94a3b8;
    
    /* 输入框 */
    --input-bg: #ffffff;
    --input-border: #cbd5e1;
    --input-focus: var(--primary-color);
    --input-focus-bg: rgba(37, 99, 235, 0.02);
    
    /* 阴影 - Glassmorphism 风格的柔和阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15);
    --shadow-button: 0 4px 12px rgba(37, 99, 235, 0.2);
    
    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* ==================== 头部 ==================== */
.header {
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
}

.header-content {
    animation: fadeInDown 0.6s ease-out;
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ==================== 卡片 ==================== */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(8px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    animation: fadeInUp 0.6s ease-out;
    position: relative;
    overflow: visible;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover {
    border-color: var(--card-border-hover);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    letter-spacing: -0.01em;
}

/* ==================== 表单 ==================== */
.input-section {
    margin-bottom: var(--spacing-xl);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.label-text {
    font-size: 0.95rem;
}

.required-badge,
.optional-badge {
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 6px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.required-badge {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 2px 4px rgba(239, 68, 68, 0.2);
}

.optional-badge {
    background: var(--text-hint);
    color: white;
    opacity: 0.8;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.form-group input:hover,
.form-group select:hover {
    border-color: var(--primary-light);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--input-focus);
    background: var(--input-focus-bg);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1), var(--shadow-sm);
    transform: translateY(-1px);
}

/* 防止浏览器自动填充改变背景色 */
.form-group input:-webkit-autofill,
.form-group input:-webkit-autofill:hover,
.form-group input:-webkit-autofill:focus,
.form-group input:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0 30px var(--input-bg) inset !important;
    -webkit-text-fill-color: var(--text-primary) !important;
    transition: background-color 5000s ease-in-out 0s;
}

.form-group input::placeholder {
    color: var(--text-hint);
}

/* 下拉选择框样式 */
.form-group select {
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-color: var(--input-bg) !important;
    padding-right: 45px;
    color: var(--text-primary) !important;
}

/* 下拉选项样式 - 白色背景 */
.form-group select option {
    background-color: #ffffff;
    color: #1f2937;
    padding: 12px 16px;
    font-size: 1rem;
    font-weight: normal;
    min-height: 40px;
}

/* 选中的选项 */
.form-group select option:checked {
    background: linear-gradient(135deg, #0066ff, #0052cc);
    color: #ffffff;
    font-weight: 600;
}

/* hover状态 */
.form-group select option:not(:checked):hover {
    background-color: rgba(0, 102, 255, 0.08);
    color: #1f2937;
}

/* 针对Webkit浏览器（Chrome, Safari, Edge） */
@supports (-webkit-appearance: none) {
    .form-group select option {
        background: #ffffff;
        color: #1f2937;
    }

    .form-group select option:checked {
        background: linear-gradient(135deg, #0066ff, #0052cc);
        color: #ffffff;
        font-weight: 600;
    }
}

/* 针对Firefox */
@-moz-document url-prefix() {
    .form-group select option {
        background-color: #ffffff;
        color: #1f2937;
    }

    .form-group select option:checked {
        background-color: #0066ff;
        color: #ffffff;
    }
}

/* 针对不同浏览器的下拉菜单背景 */
.form-group select::-ms-expand {
    display: none;
}

.hint {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--text-hint);
    font-size: 0.85rem;
    font-weight: 500;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

/* ==================== 按钮 ==================== */
.btn {
    padding: 14px 28px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    user-select: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    width: 100%;
    margin-top: var(--spacing-md);
    box-shadow: var(--shadow-button);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 100%);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-hover) 0%, #1e40af 100%);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover:not(:disabled)::before {
    opacity: 1;
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0) scale(0.98);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--text-hint);
    box-shadow: none;
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.btn-secondary:hover {
    background: #059669;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.25);
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

/* ==================== 结果展示 ==================== */
.result-section {
    animation: fadeInUp 0.6s ease-out;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.result-content {
    background: #f9fafb;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    max-height: 600px;
    overflow-x: auto;
    overflow-y: auto;
    color: var(--text-primary);
    border: 1px solid var(--card-border);
}

/* Markdown样式 */
.result-content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-md) 0;
    background: #ffffff;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-sm);
}

.result-content table th,
.result-content table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--card-border);
}

.result-content table th {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.result-content table tr:hover {
    background: rgba(37, 99, 235, 0.02);
    transition: background 0.2s ease;
}

.result-content p {
    margin: var(--spacing-md) 0;
    line-height: 1.8;
}

.result-content a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    border-bottom: 1px solid transparent;
}

.result-content a:hover {
    color: var(--primary-hover);
    border-bottom-color: var(--primary-hover);
}

/* 滚动条美化 */
.result-content::-webkit-scrollbar {
    width: 10px;
}

.result-content::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 8px;
    margin: 4px 0;
}

.result-content::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    border-radius: 8px;
    border: 2px solid #f1f5f9;
    background-clip: padding-box;
}

.result-content::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--primary-hover) 0%, #1e40af 100%);
}

/* ==================== 加载动画 ==================== */
.loading-overlay {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-lg);
    width: 100%;
    position: relative;
    min-height: 150px;
}

.loading-spinner {
    text-align: center;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-glow);
    animation: fadeInUp 0.3s ease-out;
    width: 100%;
    max-width: 400px;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(37, 99, 235, 0.15);
    border-top: 4px solid var(--primary-color);
    border-right: 4px solid var(--primary-light);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--spacing-md);
}

.loading-text {
    color: var(--text-primary);
    font-size: 1.05rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==================== Toast提示 ==================== */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(30, 41, 59, 0.95);
    backdrop-filter: blur(10px);
    color: white;
    padding: 16px 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 2000;
    max-width: 500px;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.success {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #059669 100%);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.toast.error {
    background: linear-gradient(135deg, var(--danger-color) 0%, #dc2626 100%);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

/* ==================== 页脚 ==================== */
.footer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    color: var(--text-hint);
    font-size: 0.9rem;
}

/* ==================== 动画 ==================== */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* 按钮光泽动画 */
@keyframes shine {
    0% {
        transform: translateX(-100%) rotate(45deg);
    }
    100% {
        transform: translateX(200%) rotate(45deg);
    }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
    }
    
    .title {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .card {
        padding: var(--spacing-lg);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .result-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }
    
    .result-content table {
        font-size: 0.85rem;
    }
    
    .result-content table th,
    .result-content table td {
        padding: 8px 12px;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 1.5rem;
    }
    
    .card {
        padding: var(--spacing-md);
    }
    
    .btn {
        padding: 12px 20px;
    }
}