/* ============================================
   设计系统变量 — 深夜蓝极客主题
   ============================================ */
:root {
    /* 主色调 — 亮蓝 */
    --color-primary-50: #eff6ff;
    --color-primary-100: #dbeafe;
    --color-primary-200: #bfdbfe;
    --color-primary-500: #3b82f6;
    --color-primary-600: #2563eb;
    --color-primary-700: #1d4ed8;

    /* 强调色 — 天青 */
    --color-accent-50: #f0f9ff;
    --color-accent-100: #e0f2fe;
    --color-accent-500: #0ea5e9;
    --color-accent-600: #0284c7;
    --color-accent-700: #0369a1;

    /* 成功色 */
    --color-success-50: #f0fdf4;
    --color-success-500: #22c55e;
    --color-success-600: #16a34a;

    /* 警告/危险 */
    --color-danger-50: #fef2f2;
    --color-danger-500: #ef4444;
    --color-danger-600: #dc2626;

    /* 报告导出 — 深蓝 */
    --color-report-500: #3b82f6;
    --color-report-600: #1e40af;

    /* 中性色 */
    --color-gray-0: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;

    /* 背景 */
    --bg-body: #f1f5f9;
    --bg-card: #ffffff;
    --bg-elevated: #ffffff;

    /* 圆角 */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.25rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.04);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.06), 0 2px 4px -2px rgb(0 0 0 / 0.04);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.07), 0 4px 6px -4px rgb(0 0 0 / 0.04);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.08), 0 8px 10px -6px rgb(0 0 0 / 0.04);

    /* 间距 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;

    /* 字体 */
    --font-sans: 'Inter', 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;

    /* 过渡 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-body);
    color: var(--color-gray-800);
    line-height: 1.6;
    padding: var(--space-8) var(--space-6);
    min-height: 100vh;
}

/* ============================================
   容器
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* ============================================
   顶部头图 — 深夜蓝
   ============================================ */
.hero-header {
    background: linear-gradient(160deg, #0f172a 0%, #1e3a5f 50%, #172554 100%);
    padding: 2.5rem 2rem;
    border-radius: var(--radius-2xl);
    margin-bottom: var(--space-8);
    text-align: center;
    box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.35);
    position: relative;
    overflow: hidden;
}

.hero-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(56, 189, 248, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

.hero-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: #f8fafc;
    position: relative;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* ============================================
   步骤指示器
   ============================================ */
.step-indicator {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-8);
    background: var(--bg-card);
    padding: var(--space-5) var(--space-8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-gray-200);
    gap: var(--space-2);
}

.step {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex: 1;
    position: relative;
}

.step .step-num {
    width: 36px;
    height: 36px;
    background: var(--color-gray-100);
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--color-gray-500);
    border: 2px solid var(--color-gray-200);
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.step-info {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.step-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-gray-600);
}

.step-desc {
    font-size: 0.75rem;
    color: var(--color-gray-400);
    font-weight: 400;
}

.step.active .step-num {
    background: var(--color-primary-600);
    color: white;
    border-color: var(--color-primary-600);
    box-shadow: 0 0 0 4px var(--color-primary-100);
}

.step.active .step-label {
    color: var(--color-primary-700);
}

.step.completed .step-num {
    background: var(--color-success-500);
    color: white;
    border-color: var(--color-success-500);
}

.step-divider {
    width: 32px;
    height: 2px;
    background: var(--color-gray-200);
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

/* ============================================
   卡片
   ============================================ */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--space-8);
    transition: box-shadow var(--transition-base);
    border: 1px solid var(--color-gray-200);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-header {
    padding: var(--space-6) var(--space-8) var(--space-4);
    border-bottom: 1px solid var(--color-gray-100);
    background: linear-gradient(to bottom, var(--color-gray-50), var(--color-gray-0));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-gray-900);
}

.card-icon {
    font-size: 1.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-primary-50);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.card-title-text {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.card-subtitle {
    font-size: 0.8rem;
    color: var(--color-gray-500);
    font-weight: 400;
}

.card-body {
    padding: var(--space-6) var(--space-8);
    flex: 1;
}

.card-body-report {
    padding: var(--space-6);
    background: var(--color-gray-50);
}

.card-footer {
    background: var(--color-gray-50);
    padding: var(--space-4) var(--space-8);
    border-top: 1px solid var(--color-gray-100);
    font-size: 0.875rem;
    color: var(--color-gray-500);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    flex-wrap: wrap;
    align-items: center;
}

.card-footer-info {
    justify-content: flex-start;
    background: linear-gradient(to right, var(--color-primary-50), var(--color-gray-50));
    color: var(--color-primary-700);
    font-size: 0.8rem;
    gap: var(--space-2);
}

.footer-icon {
    font-size: 1rem;
}

/* ============================================
   按钮
   ============================================ */
.btn {
    border: none;
    background: var(--color-gray-100);
    padding: 0.6rem 1.25rem;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    color: var(--color-gray-700);
    border-radius: var(--radius-md);
    line-height: 1.5;
    white-space: nowrap;
}

.btn:hover:not(:disabled) {
    background: var(--color-gray-200);
    transform: translateY(-1px);
}

.btn:active:not(:disabled) {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--color-gray-100);
    color: var(--color-gray-400);
    transform: none;
    box-shadow: none;
}

.btn-primary {
    background: var(--color-primary-600);
    color: white;
    box-shadow: 0 1px 3px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-700);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-success {
    background: var(--color-success-600);
    color: white;
    box-shadow: 0 1px 3px rgba(22, 163, 74, 0.2);
}

.btn-success:hover:not(:disabled) {
    background: var(--color-success-500);
    box-shadow: 0 4px 12px rgba(22, 163, 74, 0.25);
}

.btn-accent {
    background: var(--color-accent-600);
    color: white;
    box-shadow: 0 1px 3px rgba(2, 132, 199, 0.25);
}

.btn-accent:hover:not(:disabled) {
    background: var(--color-accent-700);
    box-shadow: 0 4px 12px rgba(2, 132, 199, 0.3);
}

.btn-outline {
    border: 1px solid var(--color-gray-300);
    background: var(--color-gray-0);
    color: var(--color-gray-600);
}

.btn-outline:hover:not(:disabled) {
    background: var(--color-gray-50);
    border-color: var(--color-gray-400);
    color: var(--color-gray-700);
}

.btn-report {
    background: var(--color-report-600);
    color: white;
    box-shadow: 0 1px 3px rgba(30, 64, 175, 0.25);
}

.btn-report:hover:not(:disabled) {
    background: var(--color-report-500);
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.3);
}

.btn-danger {
    color: var(--color-danger-600);
    background: var(--color-danger-50);
}

.btn-danger:hover:not(:disabled) {
    background: var(--color-danger-500);
    color: white;
}

.btn-icon {
    background: var(--color-gray-100);
    border: none;
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-radius: var(--radius-md);
    color: var(--color-gray-600);
    font-weight: 500;
}

.btn-icon:hover {
    background: var(--color-gray-200);
}

.btn-text {
    background: transparent;
    border: none;
    color: var(--color-gray-500);
    font-size: 0.8rem;
    cursor: pointer;
    padding: var(--space-1) var(--space-2);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.btn-text:hover {
    color: var(--color-danger-600);
}

/* ============================================
   表单控件
   ============================================ */
textarea,
input[type="text"],
input[type="password"],
input[type="file"],
select,
.user-name-input,
.user-textarea,
.preview-box {
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    line-height: 1.6;
    border: 1px solid var(--color-gray-300);
    background: var(--color-gray-0);
    color: var(--color-gray-800);
    transition: all var(--transition-fast);
    outline: none;
}

textarea:focus,
input[type="text"]:focus,
input[type="password"]:focus,
select:focus,
.user-name-input:focus,
.user-textarea:focus {
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px var(--color-primary-100);
    background: var(--color-gray-0);
}

textarea::placeholder,
input::placeholder {
    color: var(--color-gray-400);
    font-size: 0.85rem;
}

textarea {
    width: 100%;
    padding: var(--space-4);
    resize: vertical;
    min-height: 80px;
}

select {
    padding: 0.6rem 2.5rem 0.6rem 1rem;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    cursor: pointer;
}

/* ============================================
   选项卡
   ============================================ */
.tab-header {
    display: flex;
    gap: var(--space-1);
    border-bottom: 2px solid var(--color-gray-200);
    padding-bottom: 0;
    margin-bottom: var(--space-6);
}

.tab-btn {
    background: transparent;
    border: none;
    padding: var(--space-3) var(--space-5);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-gray-500);
    cursor: pointer;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    transition: all var(--transition-fast);
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: -2px;
}

.tab-btn:hover {
    color: var(--color-gray-700);
    background: var(--color-gray-50);
}

.tab-btn.active {
    color: var(--color-primary-700);
    background: var(--color-primary-50);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--space-3);
    right: var(--space-3);
    height: 2px;
    background: var(--color-primary-600);
    border-radius: var(--radius-full);
}

.tab-icon {
    font-size: 1rem;
}

.tab-content {
    display: none;
    animation: fadeIn 0.2s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }

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

/* ============================================
   研究定向表单
   ============================================ */
.research-vertical {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
    width: 100%;
}

.research-field {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.research-field label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-gray-700);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.required {
    color: var(--color-danger-500);
    font-weight: 700;
}

.field-hint {
    font-size: 0.8rem;
    color: var(--color-gray-500);
    margin-top: var(--space-1);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

/* ============================================
   复选框
   ============================================ */
.checkbox-field {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    margin-top: var(--space-1);
    padding: var(--space-3) var(--space-4);
    background: var(--color-primary-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-primary-100);
    transition: all var(--transition-fast);
}

.checkbox-field:hover {
    background: var(--color-primary-100);
    border-color: var(--color-primary-200);
}

.checkbox-field input[type="checkbox"] {
    width: 1.125rem;
    height: 1.125rem;
    cursor: pointer;
    accent-color: var(--color-primary-600);
    margin-top: 0.125rem;
    flex-shrink: 0;
}

.checkbox-field label {
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--color-gray-800);
}

.checkbox-label-main {
    font-weight: 600;
    color: var(--color-primary-700);
}

.checkbox-label-sub {
    font-size: 0.8rem;
    color: var(--color-gray-500);
    font-weight: 400;
}

.checkbox-inline {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.85rem;
    color: var(--color-gray-600);
    cursor: pointer;
}

.checkbox-inline input {
    accent-color: var(--color-primary-600);
    cursor: pointer;
}

/* ============================================
   提纲预览
   ============================================ */
.outline-preview {
    background: var(--color-primary-50);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    margin-top: var(--space-3);
    border: 1px solid var(--color-primary-100);
    animation: fadeIn 0.3s ease;
}

.outline-preview-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
    color: var(--color-primary-700);
    font-size: 0.875rem;
}

.outline-preview-icon {
    font-size: 1rem;
}

/* ============================================
   批量输入
   ============================================ */
.batch-input-area {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.batch-upload-block,
.batch-text-block {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.batch-upload-block label,
.batch-text-block label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

.file-input-wrapper {
    position: relative;
    border: 2px dashed var(--color-gray-300);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-align: center;
    transition: all var(--transition-fast);
    background: var(--color-gray-50);
    cursor: pointer;
}

.file-input-wrapper:hover {
    border-color: var(--color-primary-400);
    background: var(--color-primary-50);
}

.file-input-wrapper input[type="file"] {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-input-text {
    color: var(--color-gray-500);
    font-size: 0.875rem;
    pointer-events: none;
}

.batch-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.batch-tag {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    background: var(--color-gray-100);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-gray-600);
    font-family: var(--font-mono);
}

.batch-textarea {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    padding: var(--space-4);
}

/* ============================================
   用户管理
   ============================================ */
.users-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.user-card {
    background: var(--color-gray-0);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    transition: all var(--transition-base);
    position: relative;
}

.user-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: var(--space-5);
    bottom: var(--space-5);
    width: 3px;
    background: var(--color-primary-200);
    border-radius: var(--radius-full);
    transition: background var(--transition-fast);
}

.user-card:hover {
    border-color: var(--color-primary-300);
    box-shadow: var(--shadow-md);
}

.user-card:hover::before {
    background: var(--color-primary-500);
}

.user-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
    flex-wrap: wrap;
    gap: var(--space-3);
}

.user-name-input {
    flex: 2;
    min-width: 180px;
    padding: 0.5rem 1rem;
    border: 1px solid var(--color-gray-300);
    font-size: 0.9rem;
    background: white;
    font-weight: 600;
    color: var(--color-gray-800);
}

.user-actions {
    display: flex;
    gap: var(--space-2);
}

.user-textarea {
    width: 100%;
    border: 1px solid var(--color-gray-200);
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    resize: vertical;
    min-height: 120px;
    background: var(--color-gray-50);
}

.user-textarea:focus {
    background: var(--color-gray-0);
}

.add-user-btn {
    margin-top: var(--space-2);
    background: linear-gradient(to right, var(--color-primary-50), var(--color-primary-100));
    border: 2px dashed var(--color-primary-300);
    width: 100%;
    padding: var(--space-4);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-radius: var(--radius-lg);
    color: var(--color-primary-700);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.add-user-btn:hover {
    background: linear-gradient(to right, var(--color-primary-100), var(--color-primary-200));
    border-color: var(--color-primary-500);
    color: var(--color-primary-800);
}

.add-user-icon {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1;
}

/* ============================================
   API 配置 — 沉稳 Slate 灰白
   ============================================ */
.api-config-area {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
    border: 1px solid #e2e8f0;
}

.api-config-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
    color: #334155;
    font-weight: 700;
    font-size: 0.9rem;
}

.api-config-icon {
    font-size: 1.125rem;
}

.api-config-grid {
    display: grid;
    grid-template-columns: 2fr 1fr auto;
    gap: var(--space-4);
    align-items: end;
}

.api-config-field {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.api-config-field label {
    font-weight: 600;
    font-size: 0.8rem;
    color: #475569;
}

.api-key-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.api-key-input {
    width: 100%;
    padding: 0.6rem 2.5rem 0.6rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    border: 1px solid #cbd5e1;
    background: white;
}

.api-key-input:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.api-key-toggle {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
    padding: var(--space-1);
}

.api-key-toggle:hover {
    opacity: 1;
}

.api-config-options {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding-bottom: var(--space-1);
}

.api-config-hint {
    margin-top: var(--space-3);
    font-size: 0.8rem;
    color: #64748b;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* ============================================
   操作栏 & Prompt 预览
   ============================================ */
.action-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    align-items: center;
}

.prompt-preview-section {
    margin-top: var(--space-4);
}

.prompt-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-2);
}

.prompt-preview-label {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-gray-700);
}

.prompt-preview-hint {
    font-size: 0.75rem;
    color: var(--color-gray-400);
}

.preview-box {
    background: #0f172a;
    color: #e2e8f0;
    white-space: pre-wrap;
    font-family: var(--font-mono);
    max-height: 260px;
    overflow-y: auto;
    font-size: 0.8rem;
    line-height: 1.6;
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border: 1px solid #1e293b;
}

.preview-box::-webkit-scrollbar {
    width: 8px;
}

.preview-box::-webkit-scrollbar-track {
    background: #1e293b;
    border-radius: var(--radius-full);
}

.preview-box::-webkit-scrollbar-thumb {
    background: #475569;
    border-radius: var(--radius-full);
}

.preview-box::-webkit-scrollbar-thumb:hover {
    background: #64748b;
}

/* ============================================
   手动粘贴区域
   ============================================ */
.manual-section {
    margin-top: var(--space-6);
    border-top: 1px solid var(--color-gray-200);
    padding-top: var(--space-4);
}

.toggle-manual-btn {
    background: none;
    border: none;
    color: var(--color-primary-600);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    padding: var(--space-2) 0;
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    transition: color var(--transition-fast);
}

.toggle-manual-btn:hover {
    color: var(--color-primary-700);
}

.toggle-icon-manual {
    font-size: 0.75rem;
    transition: transform var(--transition-fast);
    display: inline-block;
}

.manual-json-area {
    background: var(--color-gray-50);
    border: 2px dashed var(--color-gray-300);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin-top: var(--space-3);
    animation: fadeIn 0.2s ease;
}

.manual-json-header {
    margin-bottom: var(--space-4);
}

.manual-json-header h4 {
    font-size: 0.95rem;
    margin-bottom: var(--space-1);
    color: var(--color-gray-800);
}

.manual-json-header p {
    font-size: 0.8rem;
    color: var(--color-gray-500);
    line-height: 1.5;
}

#manualJsonInput {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    padding: var(--space-4);
    background: var(--color-gray-0);
    min-height: 200px;
}

/* ============================================
   树形结构
   ============================================ */
.tree-root {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.tree-node {
    list-style: none;
    margin: 0.15rem 0;
}

.tree-node-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    padding: 0.4rem var(--space-2);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.tree-node-header:hover {
    background: var(--color-primary-50);
}

.toggle-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-primary-600);
    user-select: none;
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.node-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-gray-800);
}

.node-details {
    margin-left: 1.75rem;
    margin-top: var(--space-2);
    margin-bottom: var(--space-3);
    padding-left: var(--space-3);
    border-left: 2px solid var(--color-primary-200);
}

.node-findings {
    background: linear-gradient(to right, #fef9c3, #fefce8);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    margin: var(--space-2) 0;
    font-size: 0.875rem;
    color: var(--color-gray-800);
    border: 1px solid #fde047;
    line-height: 1.6;
}

.node-findings strong {
    color: #a16207;
    font-weight: 700;
}

.node-quotes {
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    margin-top: var(--space-2);
    font-size: 0.85rem;
    border: 1px solid var(--color-gray-200);
}

.node-quotes ul {
    margin-left: var(--space-4);
    margin-top: var(--space-2);
    list-style-type: disc;
}

.node-quotes ul li {
    margin-bottom: var(--space-1);
    color: var(--color-gray-600);
    line-height: 1.5;
}

.children-container {
    padding-left: 1.25rem;
    overflow: hidden;
    transition: max-height 0.2s ease;
}

.children-container.collapsed {
    display: none;
}

/* ============================================
   报告区域
   ============================================ */
.coding-viz {
    min-height: 200px;
}

.report-section {
    margin-bottom: var(--space-6);
}

.report-section:last-child {
    margin-bottom: 0;
}

.report-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-1);
    border-bottom: 2px solid var(--color-gray-200);
    margin-bottom: var(--space-4);
}

.report-section-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-gray-900);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.report-section-subtitle {
    font-size: 0.8rem;
    color: var(--color-gray-500);
    font-weight: 500;
}

.report-section-body {
    background: var(--color-gray-0);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    padding: var(--space-5);
}

/* ============================================
   用户画像
   ============================================ */
.profile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-4);
}

.profile-card {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.profile-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(to right, #2563eb, #0ea5e9);
}

.profile-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--color-primary-200);
}

.profile-card-name {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--color-gray-900);
    margin-bottom: var(--space-2);
}

.profile-card-text {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    line-height: 1.6;
}

/* ============================================
   额外发现 — 蓝色系替代紫色
   ============================================ */
.extra-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.extra-item {
    padding: var(--space-5);
    border-radius: var(--radius-lg);
    background: linear-gradient(to bottom right, #eff6ff, #dbeafe);
    border: 1px solid #bfdbfe;
    transition: all var(--transition-base);
}

.extra-item:hover {
    box-shadow: var(--shadow-md);
    border-color: #93c5fd;
}

.extra-item-title {
    font-weight: 700;
    font-size: 0.95rem;
    color: #1e40af;
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.extra-item-desc {
    font-size: 0.875rem;
    color: var(--color-gray-700);
    line-height: 1.6;
    margin-bottom: var(--space-3);
}

.extra-item-quotes {
    font-size: 0.85rem;
    color: var(--color-gray-600);
    background: rgba(255, 255, 255, 0.6);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    border: 1px solid #dbeafe;
}

.extra-item-quotes ul {
    margin-left: var(--space-4);
    margin-top: var(--space-2);
    list-style-type: disc;
}

.extra-item-quotes ul li {
    margin-bottom: var(--space-1);
    line-height: 1.5;
}

/* ============================================
   引述切换
   ============================================ */
.quote-toggle-btn {
    background: var(--color-primary-50);
    border: 1px solid var(--color-primary-200);
    color: var(--color-primary-700);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    transition: all var(--transition-fast);
}

.quote-toggle-btn:hover {
    background: var(--color-primary-100);
    border-color: var(--color-primary-300);
}

.quotes-list-container {
    margin-top: var(--space-2);
    animation: fadeIn 0.2s ease;
}

/* ============================================
   空状态
   ============================================ */
.empty-placeholder {
    color: var(--color-gray-400);
    text-align: center;
    padding: var(--space-12) var(--space-6);
    background: var(--color-gray-0);
    border-radius: var(--radius-xl);
    border: 2px dashed var(--color-gray-200);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
}

.empty-icon {
    font-size: 2.5rem;
    opacity: 0.5;
}

.empty-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-gray-500);
}

.empty-desc {
    font-size: 0.875rem;
    color: var(--color-gray-400);
}

/* ============================================
   状态消息
   ============================================ */
.status-msg {
    font-size: 0.85rem;
    padding: var(--space-2) 0;
    color: var(--color-success-600);
    font-weight: 500;
    min-height: 1.5rem;
}

.status-msg-center {
    text-align: center;
    padding: var(--space-3) 0;
}

/* ============================================
   模态框
   ============================================ */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background: var(--color-gray-0);
    max-width: 600px;
    width: 90%;
    box-shadow: var(--shadow-xl);
    position: relative;
    max-height: 85vh;
    overflow-y: auto;
    border-radius: var(--radius-xl);
    z-index: 1;
    animation: modalSlideIn 0.2s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.98);
    }

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

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--color-gray-100);
    background: var(--color-gray-50);
    position: sticky;
    top: 0;
    z-index: 2;
}

.modal-header h3 {
    color: var(--color-gray-900);
    font-size: 1.125rem;
    font-weight: 700;
}

.close-modal {
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-gray-400);
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
    line-height: 1;
}

.close-modal:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
}

.modal-body {
    padding: var(--space-6);
}

.modal-section {
    margin-bottom: var(--space-5);
}

.modal-section:last-child {
    margin-bottom: 0;
}

.modal-section-label {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
    margin-bottom: var(--space-2);
}

.modal-section-content {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--color-gray-700);
}

.examples-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.examples-list p {
    padding: var(--space-4);
    background: var(--color-gray-50);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-primary-500);
    white-space: pre-wrap;
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--color-gray-700);
    margin: 0;
}

/* ============================================
   页脚
   ============================================ */
footer {
    text-align: center;
    padding: var(--space-8) var(--space-4);
    margin-top: var(--space-4);
}

.footer-content {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
    justify-content: center;
    color: var(--color-gray-500);
    font-size: 0.8rem;
}

.footer-brand {
    font-weight: 700;
    color: var(--color-gray-700);
}

.footer-divider {
    color: var(--color-gray-300);
}

.footer-version {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-gray-400);
    background: var(--color-gray-100);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
}

/* ============================================
   Badge
   ============================================ */
.badge-icon {
    background: linear-gradient(135deg, var(--color-primary-100), var(--color-primary-50));
    border-radius: var(--radius-full);
    padding: var(--space-1) var(--space-3);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-primary-700);
    border: 1px solid var(--color-primary-200);
    white-space: nowrap;
}

/* ============================================
   Toast 通知
   ============================================ */
.toast-notify {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-gray-900);
    color: white;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    z-index: 9999;
    box-shadow: var(--shadow-xl);
    animation: toastFadeInOut 1.5s ease forwards;
    pointer-events: none;
    white-space: nowrap;
}

@keyframes toastFadeInOut {
    0% {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }

    12% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }

    88% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }

    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(12px);
    }
}

/* ============================================
   按钮组
   ============================================ */
.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-4);
    align-items: center;
}

/* ============================================
   响应式
   ============================================ */
@media (max-width: 860px) {
    body {
        padding: var(--space-4);
    }

    .hero-header {
        padding: var(--space-6) var(--space-5);
    }

    .hero-header h1 {
        font-size: 1.5rem;
    }

    .step-indicator {
        padding: var(--space-4);
        gap: var(--space-2);
    }

    .step-desc {
        display: none;
    }

    .step-divider {
        width: 16px;
    }

    .card-header,
    .card-body,
    .card-footer {
        padding-left: var(--space-5);
        padding-right: var(--space-5);
    }

    .api-config-grid {
        grid-template-columns: 1fr;
    }

    .action-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .action-bar .btn {
        width: 100%;
    }

    .profile-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .step-indicator {
        flex-wrap: wrap;
    }

    .step {
        flex: 1 1 40%;
    }

    .step-divider:nth-child(4) {
        display: none;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }

    .user-header {
        flex-direction: column;
        align-items: stretch;
    }

    .user-name-input {
        width: 100%;
    }

    .footer-content {
        flex-direction: column;
        gap: var(--space-1);
    }

    .footer-divider {
        display: none;
    }
}