/* ============================================================
   清爽调研报告风格 v3.0 - AI产品终极形态思考
   ============================================================ */

/* === CSS Variables === */
:root {
    --color-success: #059669;
    --color-success-light: #10B981;
    --color-success-dark: #047857;
    --color-success-50: #ECFDF5;
    --color-danger: #E11D48;
    --color-danger-light: #F43F5E;
    --color-warning: #D97706;
    --color-warning-light: #F59E0B;
    --color-info: #2563EB;
    --color-info-light: #3B82F6;
    --color-info-50: #EFF6FF;
    --color-purple: #7C3AED;
    --color-purple-light: #8B5CF6;
    --color-purple-50: #F5F3FF;

    --color-text-primary: #1C1917;
    --color-text-secondary: #57534E;
    --color-text-muted: #78716C;
    --color-border: #E7E5E4;
    --color-border-light: #F5F5F4;
    --color-bg: #F8FAFB;
    --color-bg-card: #FFFFFF;
    --color-bg-table-header: #FAFAF9;

    --gradient-success: linear-gradient(135deg, #059669 0%, #10B981 100%);
    --gradient-hero: linear-gradient(135deg, #059669 0%, #2563EB 50%, #7C3AED 100%);
    --gradient-badge: linear-gradient(135deg, #ECFDF5 0%, #EFF6FF 100%);
    --gradient-mesh:
        radial-gradient(at 20% 20%, rgba(5,150,105,0.08) 0%, transparent 50%),
        radial-gradient(at 80% 80%, rgba(37,99,235,0.06) 0%, transparent 50%),
        radial-gradient(at 50% 50%, rgba(124,58,237,0.04) 0%, transparent 50%);

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-card: 0 2px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
    --shadow-glow-success: 0 4px 14px rgba(5,150,105,0.15);
    --shadow-glow-info: 0 4px 14px rgba(37,99,235,0.15);
    --shadow-hover: 0 6px 16px rgba(5,150,105,0.15), 0 2px 6px rgba(5,150,105,0.1);

    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 40px;
    --spacing-3xl: 48px;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;

    --font-family: -apple-system, "SF Pro Display", "system-ui", "Segoe UI", "Noto Sans SC", Helvetica, Arial, sans-serif;
    --heading-1: 30px;
    --heading-2: 20px;
    --heading-3: 16px;
    --heading-4: 14px;
    --body-text: 15px;
    --body-small: 14px;
    --caption: 12px;

    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --content-max-width: 1120px;

    /* Architecture-specific colors */
    --c-skill-native: #2DA44E;
    --c-skill-tool: #7C3AED;
    --c-skill-task: #EA580C;
    --c-skill-flow: #0969DA;
}

/* === Base Reset === */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: var(--font-family);
    font-size: var(--body-text);
    line-height: 1.65;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    background-image: var(--gradient-mesh);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection { background: rgba(5, 150, 105, 0.2); }

.container {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md) 48px;
}

/* === Hero Header === */
.header {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    margin-bottom: var(--spacing-2xl);
    position: relative;
    overflow: hidden;
}

.header::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient-hero);
}

.header-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) 14px;
    background: var(--gradient-badge);
    color: var(--color-info);
    border-radius: var(--radius-full);
    font-size: var(--caption);
    font-weight: 500;
    letter-spacing: 0.02em;
    margin-bottom: 20px;
    border: 1px solid rgba(37, 99, 235, 0.12);
    box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}

.header-title {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-subtitle {
    font-size: var(--body-text);
    color: var(--color-text-secondary);
    max-width: 580px;
    margin: 0 auto;
    line-height: 1.6;
}

/* === Summary Box === */
.summary-box {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    position: relative;
    overflow: hidden;
    border-left: 4px solid var(--color-success);
}

.summary-label {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--caption);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-success);
    margin-bottom: 12px;
}

.summary-label::before {
    content: '';
    width: 8px; height: 8px;
    background: var(--color-success);
    border-radius: 50%;
    box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.15);
}

.summary-title {
    font-size: var(--heading-2);
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 12px;
    color: var(--color-text-primary);
}

.summary-title em {
    color: var(--color-success);
    font-style: normal;
    font-weight: 700;
}

.summary-text {
    color: var(--color-text-secondary);
    font-size: var(--body-text);
    line-height: 1.7;
}

/* === Main Tab Navigation (Glassmorphism) === */
.tab-nav {
    display: flex;
    flex-wrap: nowrap;
    gap: 4px;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px) saturate(1.8);
    -webkit-backdrop-filter: blur(20px) saturate(1.8);
    border: 1px solid rgba(255,255,255,0.7);
    border-radius: var(--radius-lg);
    padding: 5px;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(0,0,0,0.03);
    position: sticky;
    top: 12px;
    z-index: 100;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 14px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
}

.tab-btn:hover {
    background: var(--color-bg-table-header);
    color: var(--color-text-secondary);
}

.tab-btn.active {
    background: var(--gradient-success);
    color: #fff;
    box-shadow: var(--shadow-glow-success);
    font-weight: 600;
}

.tab-btn-num {
    width: 22px; height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.06);
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
}

.tab-btn.active .tab-btn-num {
    background: rgba(255,255,255,0.2);
}

/* === Tab Panels === */
.tab-panel { display: none; animation: fadeIn 0.3s ease-out; }
.tab-panel.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === Section Overview (Chapter Header Image) === */
.section-overview {
    background: linear-gradient(135deg, #F8FAF9 0%, #F3F7F5 100%);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.section-overview-label {
    position: absolute;
    top: 12px; left: 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: rgba(5, 150, 105, 0.1);
    color: var(--color-success);
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.section-overview-label::before { content: '📊'; font-size: 12px; }

.section-overview-content {
    padding-top: 32px;
    text-align: center;
    overflow-x: auto;
}

.section-overview-caption {
    text-align: center;
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: var(--spacing-md);
    font-style: italic;
}

/* === Paradigm Section === */
.paradigm-section {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.06) 0%, rgba(139, 92, 246, 0.04) 100%);
    border: 1px solid rgba(124, 58, 237, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    position: relative;
    overflow: hidden;
}

.paradigm-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, #7C3AED, #8B5CF6, #A855F7);
}

.paradigm-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: var(--spacing-lg);
}

.paradigm-icon {
    width: 48px; height: 48px;
    background: linear-gradient(135deg, #7C3AED, #8B5CF6);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
}

.paradigm-badge {
    display: inline-block;
    padding: 3px 10px;
    background: linear-gradient(135deg, #7C3AED, #8B5CF6);
    color: white;
    border-radius: var(--radius-full);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.paradigm-title {
    font-size: var(--heading-2);
    font-weight: 700;
    color: var(--color-text-primary);
}

.paradigm-intro {
    font-size: var(--body-text);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    border-left: 3px solid #7C3AED;
}

.paradigm-intro strong { color: #7C3AED; }

/* Species Comparison */
.species-comparison {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    align-items: stretch;
}

.species-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    position: relative;
    overflow: hidden;
}

.species-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
}

.species-card.saas { border: 1px solid rgba(156, 163, 175, 0.3); }
.species-card.saas::before { background: #9CA3AF; }
.species-card.agent { border: 1px solid rgba(5, 150, 105, 0.3); }
.species-card.agent::before { background: var(--gradient-success); }

.species-icon {
    width: 48px; height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: var(--spacing-md);
}

.species-card.saas .species-icon { background: rgba(156, 163, 175, 0.15); }
.species-card.agent .species-icon { background: rgba(5, 150, 105, 0.15); }

.species-title {
    font-size: var(--heading-3);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.species-card.saas .species-title { color: #6B7280; }
.species-card.agent .species-title { color: var(--color-success); }

.species-subtitle {
    font-size: var(--caption);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.species-list { list-style: none; }
.species-list li {
    padding: 8px 0 8px 24px;
    position: relative;
    font-size: 13px;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border-light);
}
.species-list li:last-child { border-bottom: none; }
.species-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    font-weight: bold;
}
.species-card.saas .species-list li::before { color: #9CA3AF; }
.species-card.agent .species-list li::before { color: var(--color-success); }

.species-vs {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 800;
    color: var(--color-text-muted);
}

.paradigm-insight {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.08), rgba(139, 92, 246, 0.06));
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
}

.paradigm-insight-icon { font-size: 32px; margin-bottom: var(--spacing-sm); }
.paradigm-insight-title {
    font-size: var(--heading-4);
    font-weight: 600;
    color: #7C3AED;
    margin-bottom: var(--spacing-sm);
}
.paradigm-insight-text {
    font-size: var(--body-text);
    color: var(--color-text-primary);
    line-height: 1.7;
    font-weight: 500;
}
.paradigm-insight-text em {
    color: #7C3AED;
    font-style: normal;
    font-weight: 700;
}

/* === Story Section === */
.story-section {
    background: linear-gradient(135deg, rgba(249, 115, 22, 0.06) 0%, rgba(234, 179, 8, 0.04) 100%);
    border: 1px solid rgba(249, 115, 22, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    position: relative;
    overflow: hidden;
}

.story-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, #F97316, #EAB308, #059669);
}

.story-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: var(--spacing-lg);
}

.story-icon {
    width: 48px; height: 48px;
    background: linear-gradient(135deg, #F97316, #EAB308);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
}

.story-badge {
    display: inline-block;
    padding: 3px 10px;
    background: linear-gradient(135deg, #F97316, #EAB308);
    color: white;
    border-radius: var(--radius-full);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.story-title {
    font-size: var(--heading-2);
    font-weight: 700;
    color: var(--color-text-primary);
}

.story-intro {
    font-size: var(--body-text);
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    border-left: 3px solid #F97316;
}

.story-intro strong { color: #EA580C; }

.analogy-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.analogy-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    transition: all var(--transition-fast);
}

.analogy-card:hover {
    border-color: #F97316;
    box-shadow: 0 4px 12px rgba(249, 115, 22, 0.1);
}

.analogy-human {
    flex: 1;
    padding-right: var(--spacing-md);
    border-right: 2px dashed var(--color-border-light);
}

.analogy-ai { flex: 1; }

.analogy-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.analogy-human .analogy-label { color: #F97316; }
.analogy-ai .analogy-label { color: var(--color-success); }

.analogy-label::before {
    content: '';
    width: 6px; height: 6px;
    border-radius: 50%;
}

.analogy-human .analogy-label::before { background: #F97316; }
.analogy-ai .analogy-label::before { background: var(--color-success); }

.analogy-content {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 4px;
}

.analogy-desc {
    font-size: 12px;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.story-insight {
    background: linear-gradient(135deg, rgba(5, 150, 105, 0.08), rgba(14, 165, 233, 0.06));
    border: 1px solid rgba(5, 150, 105, 0.3);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
}

.story-insight-icon { font-size: 32px; margin-bottom: var(--spacing-sm); }
.story-insight-title {
    font-size: var(--heading-4);
    font-weight: 600;
    color: var(--color-success);
    margin-bottom: var(--spacing-sm);
}
.story-insight-text {
    font-size: var(--body-text);
    color: var(--color-text-primary);
    line-height: 1.7;
    font-weight: 500;
}
.story-insight-text em {
    color: var(--color-success);
    font-style: normal;
    font-weight: 700;
}

/* === Architecture Section === */
.arch-section {
    margin-bottom: var(--spacing-2xl);
}

.arch-intro {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.arch-intro-title {
    font-size: var(--heading-2);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.arch-intro-desc {
    font-size: var(--body-text);
    color: var(--color-text-secondary);
}

/* View Tabs (pill style) */
.view-tabs {
    display: flex;
    gap: 4px;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-full);
    padding: 4px;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.view-tab {
    padding: 8px 20px;
    border: none;
    background: transparent;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: all var(--transition-normal);
}

.view-tab:hover { color: var(--color-text-primary); background: var(--color-bg); }
.view-tab.active {
    background: var(--color-text-primary);
    color: #fff;
    font-weight: 600;
}

/* Scenario Cards (horizontal layout) */
.scenario-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.scenario-strip-label {
    grid-column: 1 / -1;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-muted);
    margin-bottom: 2px;
}

.scenario-card {
    background: var(--color-bg-card);
    border: 1.5px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 12px 14px;
    cursor: pointer;
    transition: all 250ms cubic-bezier(0.25, 1, 0.5, 1);
    position: relative;
    overflow: hidden;
}

.scenario-card::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    border-radius: 0 3px 3px 0;
    transition: all 250ms;
}

.scenario-card[data-skill="native"]::before { background: var(--c-skill-native); }
.scenario-card[data-skill="tool"]::before { background: var(--c-skill-tool); }
.scenario-card[data-skill="task"]::before { background: var(--c-skill-task); }
.scenario-card[data-skill="flow"]::before { background: var(--c-skill-flow); }

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

.scenario-card.active {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.scenario-card.active[data-skill="native"] { border-color: var(--c-skill-native); }
.scenario-card.active[data-skill="tool"] { border-color: var(--c-skill-tool); }
.scenario-card.active[data-skill="task"] { border-color: var(--c-skill-task); }
.scenario-card.active[data-skill="flow"] { border-color: var(--c-skill-flow); }
.scenario-card.active::before { width: 4px; }

.scenario-quote {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 6px;
    line-height: 1.4;
}

.scenario-meta {
    display: flex;
    align-items: center;
    gap: 6px;
}

.scenario-type {
    font-size: 10px;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: var(--radius-full);
    color: #fff;
}

.scenario-type.native { background: var(--c-skill-native); }
.scenario-type.tool { background: var(--c-skill-tool); }
.scenario-type.task { background: var(--c-skill-task); }
.scenario-type.flow { background: var(--c-skill-flow); }
.scenario-time { font-size: 11px; color: var(--color-text-muted); }

/* Architecture SVG Container */
.arch-container {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.arch-svg { width: 100%; height: auto; display: block; }

/* SVG Animations */
@keyframes flowDash { to { stroke-dashoffset: -20; } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

/* Detail Panel */
.detail-panel {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: all 300ms;
    margin-bottom: var(--spacing-md);
}

.detail-panel.hidden { display: none; }

.detail-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border-light);
    background: var(--color-bg-table-header);
}

.detail-header .icon {
    width: 32px; height: 32px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: #fff;
}

.detail-header h3 { font-size: 15px; font-weight: 700; color: var(--color-text-primary); }
.detail-header .subtitle { font-size: 12px; color: var(--color-text-muted); }
.detail-body { padding: 20px; }

/* Flow Steps */
.flow-steps {
    display: flex;
    align-items: center;
    gap: 0;
    overflow-x: auto;
    padding: 8px 0 16px;
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 100px;
    text-align: center;
}

.flow-step-num {
    width: 28px; height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 6px;
}

.flow-step-label { font-size: 12px; font-weight: 600; color: var(--color-text-primary); }
.flow-step-desc { font-size: 10px; color: var(--color-text-muted); margin-top: 2px; max-width: 90px; }
.flow-arrow { color: var(--color-border); font-size: 18px; margin: 0 -4px; padding-bottom: 20px; }

/* Skill Detail Grid */
.skill-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.skill-detail-box {
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 14px;
    border-top: 3px solid var(--color-border);
}

.skill-detail-box.native { border-top-color: var(--c-skill-native); }
.skill-detail-box.tool { border-top-color: var(--c-skill-tool); }
.skill-detail-box.task { border-top-color: var(--c-skill-task); }
.skill-detail-box.flow { border-top-color: var(--c-skill-flow); }
.skill-detail-box h4 { font-size: 13px; font-weight: 700; color: var(--color-text-primary); margin-bottom: 6px; }
.skill-detail-box p { font-size: 12px; color: var(--color-text-secondary); margin: 4px 0; }

.skill-detail-box .examples {
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid var(--color-border-light);
}

.example-tag {
    display: inline-block;
    padding: 2px 8px;
    margin: 2px;
    border-radius: var(--radius-full);
    font-size: 11px;
    background: var(--color-bg);
    color: var(--color-text-secondary);
}

/* Mapping Grid */
.mapping-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--color-border-light);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.mapping-cell {
    background: var(--color-bg-card);
    padding: 10px 12px;
    font-size: 12px;
    text-align: center;
}

.mapping-cell.head {
    background: var(--color-bg-table-header);
    font-weight: 700;
    color: var(--color-text-primary);
}

.mapping-cell .check { color: var(--color-success); font-weight: 700; }
.mapping-cell .optional { color: var(--color-purple); }
.mapping-cell .no { color: var(--color-border); }

/* Deploy Grid */
.deploy-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.deploy-card {
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: 16px;
    text-align: center;
}

.deploy-card h4 { font-size: 14px; font-weight: 700; color: var(--color-text-primary); margin-bottom: 8px; }
.deploy-card .items { text-align: left; }
.deploy-card .item {
    font-size: 12px;
    color: var(--color-text-secondary);
    padding: 3px 0;
    border-bottom: 1px solid var(--color-border-light);
}
.deploy-card .item:last-child { border-bottom: none; }

/* === Parts Grid === */
.parts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

.part-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.part-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient-success);
    opacity: 0;
    transition: var(--transition-normal);
}

.part-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
    border-color: var(--color-success);
}

.part-card:hover::before { opacity: 1; }

.part-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    background: var(--gradient-success);
    color: #fff;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 12px;
}

.part-title {
    font-size: var(--heading-3);
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 8px;
}

.part-desc {
    font-size: var(--body-small);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.part-chapters {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--color-border-light);
}

.part-chapter {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    font-size: var(--caption);
    color: var(--color-text-muted);
}

.part-chapter-num {
    width: 18px; height: 18px;
    background: var(--color-bg-table-header);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 600;
    color: var(--color-text-secondary);
}

/* === Conclusion Box === */
.conclusion-box {
    background: var(--gradient-success);
    color: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.conclusion-title {
    font-size: var(--heading-2);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.conclusion-text {
    font-size: var(--body-text);
    line-height: 1.8;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto var(--spacing-md);
}

.conclusion-highlight {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

/* === Footer === */
.footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--color-text-muted);
    font-size: var(--caption);
    border-top: 1px solid var(--color-border-light);
}

/* === Responsive === */
@media (max-width: 768px) {
    .header-title { font-size: 24px; }
    .species-comparison { grid-template-columns: 1fr; }
    .species-vs { transform: rotate(90deg); margin: var(--spacing-sm) auto; }
    .analogy-grid { grid-template-columns: 1fr; }
    .scenario-strip { grid-template-columns: 1fr 1fr; }
    .parts-grid { grid-template-columns: 1fr; }
    .skill-detail-grid { grid-template-columns: 1fr; }
    .deploy-grid { grid-template-columns: 1fr; }
    .tab-btn span:not(.tab-btn-num) { display: none; }
    .mapping-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .scenario-strip { grid-template-columns: 1fr; }
    .flow-steps { flex-wrap: wrap; justify-content: center; }
}