/* ========== Anthropic / Claude Design System ========== */
:root {
    /* Core Brand Colors - Anthropic Official */
    --primary: #d97757;          /* Anthropic Orange accent */
    --primary-light: #e89578;
    --primary-dark: #c4603f;
    --primary-subtle: rgba(217, 119, 87, 0.08);
    --secondary: #6a9bcc;        /* Anthropic Blue accent */
    --accent: #d97757;           /* Same as primary for consistency */
    --accent-green: #788c5d;     /* Anthropic Green accent */

    /* Backgrounds - Light, clean, warm */
    --bg-primary: #faf9f5;       /* Anthropic Light background */
    --bg-secondary: #f3f1ea;     /* Slightly darker warm surface */
    --bg-card: #FFFFFF;          /* Pure white cards */
    --bg-surface: #f7f5f0;      /* Warm neutral surface */
    --bg-code: #141413;          /* Anthropic Dark */
    --bg-hero: linear-gradient(160deg, #faf9f5 0%, #f3f1ea 50%, #faf9f5 100%);

    /* Text Colors - Anthropic palette */
    --text-primary: #141413;     /* Anthropic Dark */
    --text-secondary: #5c5a52;   /* Mid-tone warm gray */
    --text-muted: #b0aea5;       /* Anthropic Mid Gray */
    --text-inverse: #faf9f5;     /* Anthropic Light */

    /* Borders & Shadows - Subtle, refined */
    --border: #e8e6dc;           /* Anthropic Light Gray */
    --border-strong: rgba(176, 174, 165, 0.4);
    --shadow-sm: 0 1px 3px rgba(20, 20, 19, 0.04), 0 1px 2px rgba(20, 20, 19, 0.03);
    --shadow-md: 0 4px 12px rgba(20, 20, 19, 0.05), 0 2px 4px rgba(20, 20, 19, 0.03);
    --shadow-lg: 0 12px 40px rgba(20, 20, 19, 0.07), 0 4px 12px rgba(20, 20, 19, 0.03);
    --shadow-hover: 0 8px 30px rgba(217, 119, 87, 0.1);

    /* Spacing & Radius - Clean, modern */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Transitions - Smooth, intentional */
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    font-size: 16px;
}

body {
    font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    letter-spacing: -0.01em;
}

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 32px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

::selection {
    background: var(--primary-subtle);
    color: var(--text-primary);
}

/* ========== Navbar ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(250, 249, 245, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(250, 249, 245, 0.95);
    border-bottom-color: var(--border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.15rem;
}

.logo-icon {
    font-size: 1.4rem;
}

.logo-text {
    color: var(--primary);
    font-weight: 800;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 4px;
}

.nav-links a {
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.nav-links a.active {
    color: var(--primary);
    background: var(--primary-subtle);
}

/* Nav Links Inline - 胶囊式标签切换导航 */
.nav-links-inline {
    display: flex;
    align-items: center;
    gap: 2px;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    padding: 4px;
    border: 1px solid var(--border);
    box-shadow: inset 0 1px 2px rgba(20, 20, 19, 0.04);
}

.nav-link-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 20px;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    text-decoration: none;
    position: relative;
    letter-spacing: 0.02em;
    cursor: pointer;
    user-select: none;
}

.nav-link-item:hover {
    color: var(--text-primary);
    background: rgba(217, 119, 87, 0.06);
}

.nav-link-item.active {
    color: var(--primary-dark);
    background: rgba(217, 119, 87, 0.14);
    font-weight: 600;
    box-shadow: 0 1px 4px rgba(217, 119, 87, 0.12);
}

.nav-link-item:active {
    transform: scale(0.97);
}

.nav-link-item i {
    font-size: 0.78rem;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
}

.nav-toggle:hover {
    background: var(--bg-secondary);
}

/* ========== Hero Section ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-hero);
    overflow: hidden;
    padding: 120px 32px 80px;
}

.hero-bg-elements {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.floating-shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.25;
    animation: float 20s ease-in-out infinite;
}

.shape-1 {
    width: 500px;
    height: 500px;
    background: var(--primary-subtle);
    top: -150px;
    right: -150px;
    animation-delay: 0s;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: #E8D5C0;
    bottom: -100px;
    left: -100px;
    animation-delay: -7s;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: #D4E8DC;
    top: 40%;
    left: 60%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(20px, -20px) scale(1.03); }
    66% { transform: translate(-15px, 15px) scale(0.97); }
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 720px;
    z-index: 2;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: 8px 20px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 32px;
    box-shadow: var(--shadow-sm);
    animation: fadeInDown 0.6s ease;
}

.badge-dot {
    width: 7px;
    height: 7px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: pulse-dot 2.5s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.7); }
}

.hero-title {
    font-family: 'Poppins', 'Noto Sans SC', sans-serif;
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.12;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    animation: fadeInUp 0.6s ease 0.15s both;
}

.title-gradient {
    color: var(--primary);
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 540px;
    margin: 0 auto 36px;
    line-height: 1.7;
    font-weight: 400;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 56px;
    animation: fadeInUp 0.6s ease 0.45s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    letter-spacing: -0.01em;
}

.btn-primary {
    background: var(--primary);
    color: var(--text-inverse);
    box-shadow: 0 2px 8px rgba(201, 100, 66, 0.25);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(201, 100, 66, 0.3);
}

.btn-outline {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1.5px solid var(--border-strong);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    animation: fadeInUp 0.6s ease 0.6s both;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.03em;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
    font-weight: 500;
}

.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.72rem;
    animation: bounce 2.5s ease infinite;
    letter-spacing: 0.05em;
}

.mouse {
    width: 22px;
    height: 34px;
    border: 2px solid var(--text-muted);
    border-radius: 11px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
    opacity: 0.6;
}

.mouse-wheel {
    width: 2px;
    height: 6px;
    background: var(--text-muted);
    border-radius: 2px;
    animation: scroll-wheel 2s ease infinite;
}

@keyframes scroll-wheel {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(8px); }
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ========== Section Commons ========== */
.section {
    padding: 96px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-tag {
    display: inline-block;
    background: var(--primary-subtle);
    color: var(--primary);
    padding: 5px 16px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 14px;
}

.section-title {
    font-family: 'Poppins', 'Noto Sans SC', sans-serif;
    font-size: 2.4rem;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ========== TOC Section ========== */
.toc-section {
    background: var(--bg-primary);
}

.toc-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.toc-card {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.toc-card::before {
    content: attr(data-index);
    position: absolute;
    top: -8px;
    right: 20px;
    font-size: 4.5rem;
    font-weight: 900;
    color: rgba(201, 100, 66, 0.04);
    line-height: 1;
}

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

.toc-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--primary-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--primary);
    flex-shrink: 0;
    transition: var(--transition);
}

.toc-card:hover .toc-card-icon {
    background: var(--primary);
    color: white;
}

.toc-card-content h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.toc-card-content p {
    font-size: 0.83rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.toc-card-arrow {
    margin-left: auto;
    color: var(--primary);
    opacity: 0;
    transform: translateX(-8px);
    transition: var(--transition);
}

.toc-card:hover .toc-card-arrow {
    opacity: 1;
    transform: translateX(0);
}



/* ========== Architecture Section ========== */
.arch-section {
    background: var(--bg-primary);
}

.arch-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.arch-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.arch-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
}

.arch-card-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
}

.arch-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    background: var(--primary-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    color: var(--primary);
}

.arch-card-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.arch-badge {
    margin-left: auto;
    background: var(--primary-subtle);
    color: var(--primary);
    padding: 3px 12px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.03em;
}

.arch-tabs {
    display: flex;
    padding: 0 24px;
    gap: 2px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
}

.arch-tab {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 12px 18px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
}

.arch-tab::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.arch-tab.active {
    color: var(--primary);
}

.arch-tab.active::after {
    transform: scaleX(1);
}

.arch-tab:hover {
    color: var(--text-primary);
}

.arch-tab-content {
    display: none;
    padding: 22px 24px;
}

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

.code-block {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin: 0 0 14px;
    border: 1px solid var(--border);
}

.arch-card > .code-block {
    margin: 22px 24px;
}

.code-header {
    padding: 10px 18px;
    background: rgba(201, 100, 66, 0.06);
    border-bottom: 1px solid var(--border);
}

.code-filename {
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 600;
}

.code-body {
    padding: 18px;
    font-size: 0.875rem;
    line-height: 1.75;
}

.code-body strong {
    color: var(--primary);
    font-size: 0.9rem;
}

.code-body p {
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.code-body ul, .code-body ol {
    margin: 6px 0 14px 18px;
    color: var(--text-secondary);
}

.code-body li {
    margin-bottom: 5px;
}

.code-body code {
    background: var(--primary-subtle);
    color: var(--primary);
    padding: 2px 7px;
    border-radius: 4px;
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 0.82rem;
}

.identity-list {
    list-style: none !important;
    margin-left: 0 !important;
}

.identity-list li {
    padding: 7px 0;
    border-bottom: 1px solid var(--border);
}

.identity-list li:last-child {
    border-bottom: none;
}

.arch-credit {
    padding: 12px 24px;
    border-top: 1px solid var(--border);
    font-size: 0.72rem;
    color: var(--text-muted);
    font-style: italic;
    background: var(--bg-surface);
}

/* Memory Structure */
.memory-structure {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.memory-level {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.level-tag {
    background: var(--primary);
    color: white;
    padding: 3px 11px;
    border-radius: var(--radius-full);
    font-size: 0.7rem;
    font-weight: 700;
    white-space: nowrap;
    margin-top: 3px;
}

.memory-level h4 {
    font-size: 0.9rem;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.memory-level ul {
    list-style: none !important;
    margin: 0 !important;
}

.memory-level li {
    font-size: 0.83rem;
    padding: 3px 0;
}

.memory-level p {
    font-size: 0.83rem;
}

/* ========== Scenarios Section - 核心应用方向 ========== */
.scenarios-section {
    background: var(--bg-secondary);
}

.section-header-with-tabs {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 40px;
    gap: 24px;
    flex-wrap: wrap;
}

.section-header-left {
    flex-shrink: 0;
}

.section-header-left .section-title {
    text-align: left;
    margin-bottom: 8px;
}

.section-header-left .section-desc {
    text-align: left;
    margin: 0;
}

.scenario-tabs {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.scenario-tab {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-secondary);
    transition: var(--transition);
    white-space: nowrap;
}

.scenario-tab:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.scenario-tab.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.scenario-tab i {
    font-size: 0.75rem;
}

/* Use Case Cards Grid */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.use-case-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.use-case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
}

.use-case-card.hidden {
    display: none;
}

.use-case-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 18px;
}

.use-case-title-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.use-case-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    color: var(--primary);
    background: var(--primary-subtle);
    flex-shrink: 0;
    transition: var(--transition);
}

.use-case-card:hover .use-case-icon {
    background: var(--primary);
    color: white;
}

.use-case-header h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.use-case-subtitle {
    font-size: 0.68rem;
    color: var(--text-muted);
    font-weight: 600;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.use-case-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 800;
    color: white;
    background: var(--primary);
    flex-shrink: 0;
}

/* Feature Points */
.use-case-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px 20px;
    margin-bottom: 16px;
    flex: 1;
}

.feature-col {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.feature-point {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 4px 0;
}

.feature-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
    margin-top: 6px;
}

.feature-point strong {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text-primary);
    display: block;
    line-height: 1.3;
}

.feature-point p {
    font-size: 0.72rem;
    color: var(--text-muted);
    line-height: 1.4;
    margin-top: 1px;
}

/* Result / 实战案例 */
.use-case-result {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: auto;
    border-top: 2px solid;
    background: var(--bg-surface);
}

.use-case-result i {
    font-size: 0.85rem;
    flex-shrink: 0;
}

.use-case-result strong {
    color: var(--text-primary);
    font-weight: 700;
    white-space: nowrap;
}

/* ========== Skills Inline (in Architecture) ========== */
.skills-inline {
    margin-top: 48px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
}

.skills-inline-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.skills-inline-title i {
    color: var(--primary);
}

.skills-grid-compact {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 16px;
}

.skill-chip {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.skill-chip:hover {
    border-color: var(--primary);
    background: var(--primary-subtle);
}

.skill-chip i {
    color: var(--primary);
    font-size: 1rem;
    width: 20px;
    text-align: center;
}

.skill-chip span {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.skill-chip small {
    margin-left: auto;
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 500;
}

.skills-tip {
    font-size: 0.82rem;
    color: var(--text-muted);
    padding: 10px 14px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.skills-tip i {
    color: var(--primary);
    font-size: 0.9rem;
    flex-shrink: 0;
}

/* Architecture Cards Row */
.arch-cards-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

/* ========== Deploy Section Compact ========== */
.deploy-section-compact {
    background: var(--bg-secondary);
    padding: 64px 0;
}

.deploy-compact {
    max-width: 800px;
    margin: 0 auto;
}

.deploy-steps-row {
    display: flex;
    align-items: stretch;
    gap: 0;
    margin-bottom: 20px;
}

.deploy-step {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 22px;
    text-align: center;
    transition: var(--transition);
}

.deploy-step:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.deploy-step-num {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 800;
    margin: 0 auto 12px;
}

.deploy-step-content h4 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.code-inline {
    background: var(--bg-code);
    color: #E8DDD4;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 0.75rem;
    display: inline-block;
    word-break: break-all;
}

.deploy-result {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
    font-size: 0.78rem;
    color: var(--accent-green);
    font-weight: 600;
}

.deploy-result i {
    font-size: 0.75rem;
}

.deploy-step-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    flex-shrink: 0;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.deploy-notes {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
}

.deploy-note {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.82rem;
    color: var(--text-secondary);
}

.deploy-note i {
    color: var(--primary);
    font-size: 0.9rem;
    flex-shrink: 0;
}

/* ========== Multi-Agent Section ========== */
.multi-agent-section {
    background: var(--bg-secondary);
}

.agent-flow {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.flow-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
}

.agent-node {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 22px;
    text-align: center;
    transition: var(--transition);
    width: 170px;
}

.agent-node:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.agent-node.central {
    width: 200px;
    border-color: var(--primary);
    background: linear-gradient(135deg, var(--bg-card), var(--primary-subtle));
}

.agent-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    color: var(--primary);
    margin: 0 auto 10px;
    transition: var(--transition);
}

.agent-node:hover .agent-avatar {
    background: var(--primary);
    color: white;
}

.agent-node h4 {
    font-size: 0.9rem;
    margin-bottom: 3px;
    font-weight: 700;
    color: var(--text-primary);
}

.agent-node p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.flow-connections {
    display: flex;
    justify-content: center;
    gap: 50px;
    position: relative;
    height: 36px;
}

.connection-line {
    width: 1.5px;
    height: 100%;
    background: linear-gradient(to bottom, var(--primary), transparent);
    position: relative;
}

.connection-line::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    animation: pulse-dot 2.5s infinite;
}

.agent-nodes-row {
    display: flex;
    gap: 20px;
}

.agent-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.feature-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding: 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.feature-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.feature-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: var(--primary-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 0.95rem;
    flex-shrink: 0;
}

.feature-text h4 {
    font-size: 0.9rem;
    margin-bottom: 4px;
    font-weight: 700;
    color: var(--text-primary);
}

.feature-text p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.55;
}

/* ========== Scenario Cards Section (统一Claude暖色风格) ========== */
.scenario-cards-section {
    background: var(--bg-primary);
}

.scenario-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* Scenario Card - 统一Claude暖色调 */
.sc-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.sc-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.sc-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
}

/* Card Top Row */
.sc-card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
}

.sc-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-subtle);
    color: var(--primary);
    font-size: 1.15rem;
    transition: var(--transition);
}

.sc-card:hover .sc-card-icon {
    background: var(--primary);
    color: white;
}

.sc-card-badge {
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    background: var(--primary-subtle);
    color: var(--primary);
}

/* Card Title & Desc */
.sc-card-title {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}

.sc-card-subtitle {
    font-size: 0.82rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 10px;
}

.sc-card-desc {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 16px;
    flex: 1;
}

/* Card Feature Tags */
.sc-card-features {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 18px;
}

.sc-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 10px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    white-space: nowrap;
}

.sc-card:hover .sc-tag {
    background: var(--primary-subtle);
    border-color: rgba(201, 100, 66, 0.15);
}

/* Card Footer (Metric) - 统一暖色调 */
.sc-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-radius: var(--radius-md);
    color: white;
    margin-top: auto;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.sc-metric {
    display: flex;
    align-items: baseline;
    gap: 3px;
}

.sc-metric-value {
    font-size: 1.5rem;
    font-weight: 900;
    line-height: 1;
}

.sc-metric-unit {
    font-size: 0.68rem;
    font-weight: 600;
    opacity: 0.85;
}

.sc-metric-label {
    font-size: 0.72rem;
    font-weight: 600;
    opacity: 0.9;
    text-align: right;
}

/* ========== Scenario Modal ========== */
.scenario-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(26, 23, 21, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 32px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.scenario-modal-overlay.active {
    display: flex;
    opacity: 1;
}

.scenario-modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    max-width: 800px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 24px 80px rgba(26, 23, 21, 0.15);
    animation: modalIn 0.35s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: translateY(20px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-close {
    position: absolute;
    top: 18px;
    right: 18px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--bg-surface);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Modal Content */
.modal-content {
    padding: 40px;
}

.modal-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.modal-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--primary-subtle);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    flex-shrink: 0;
}

.modal-title-group h2 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}

.modal-title-group p {
    font-size: 0.875rem;
    color: var(--primary);
    font-weight: 600;
}

.modal-kpi-row {
    display: flex;
    gap: 12px;
    margin-bottom: 28px;
}

.modal-kpi {
    flex: 1;
    padding: 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    text-align: center;
}

.modal-kpi-value {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--primary);
    display: block;
}

.modal-kpi-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-top: 4px;
}

.modal-section {
    margin-bottom: 24px;
}

.modal-section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.modal-section-title i {
    color: var(--primary);
    font-size: 0.85rem;
}

.modal-tasks {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.modal-task {
    display: flex;
    gap: 12px;
    padding: 14px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.modal-task:hover {
    border-color: var(--primary);
    background: var(--primary-subtle);
}

.modal-task-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.modal-task-body strong {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
    display: block;
    margin-bottom: 3px;
}

.modal-task-body p {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.modal-impl-steps {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.modal-impl-step {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.modal-impl-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 800;
    flex-shrink: 0;
}

.modal-impl-step code {
    font-family: 'JetBrains Mono', 'SF Mono', monospace;
    font-size: 0.68rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 2px;
}

.modal-impl-step strong {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-primary);
    display: block;
    margin-bottom: 2px;
}

.modal-impl-step p {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.modal-case {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 20px;
    border-left: 3px solid var(--primary);
}

.modal-case-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.modal-case-header i {
    color: var(--primary);
    font-size: 1rem;
}

.modal-case-header strong {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-case-header small {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.modal-timeline {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.modal-timeline-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    border-left: 2px solid var(--border);
    font-size: 0.82rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.modal-timeline-item:hover {
    border-left-color: var(--primary);
    background: rgba(201, 100, 66, 0.04);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.modal-timeline-item i {
    color: var(--text-muted);
    font-size: 0.8rem;
    width: 18px;
    text-align: center;
    flex-shrink: 0;
}

/* ========== Digital Crew Section (数字员工) ========== */
.crew-section {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
}

.crew-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

.crew-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.crew-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.crew-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 22px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
}

.crew-avatar {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--primary-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
    color: var(--primary);
    font-size: 1.1rem;
}

.crew-card:hover .crew-avatar {
    background: var(--primary);
    color: white;
}

.crew-emoji {
    font-size: 1.3rem;
}

.crew-card:hover .crew-emoji {
    filter: none;
}

.crew-title-group {
    flex: 1;
    min-width: 0;
}

.crew-role {
    font-size: 1rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.crew-persona {
    font-size: 0.72rem;
    color: var(--primary);
    font-weight: 600;
}

.crew-badge {
    padding: 3px 10px;
    border-radius: var(--radius-full);
    background: var(--primary-subtle);
    color: var(--primary);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    white-space: nowrap;
}

.crew-card-body {
    padding: 20px 22px;
}

.crew-mission {
    margin-bottom: 16px;
}

.crew-mission h4,
.crew-traits h4 {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}

.crew-mission p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.crew-traits {
    margin-bottom: 16px;
}

.crew-traits ul {
    list-style: none;
}

.crew-traits li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 4px 0;
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.crew-traits li i {
    color: var(--accent-green);
    font-size: 0.7rem;
    margin-top: 4px;
    flex-shrink: 0;
}

.crew-quote {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 12px 14px;
    background: var(--bg-surface);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary);
}

.crew-quote i {
    color: var(--primary);
    font-size: 0.7rem;
    margin-top: 3px;
    opacity: 0.6;
    flex-shrink: 0;
}

.crew-quote span {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-style: italic;
    line-height: 1.5;
}

/* Crew Matrix */
.crew-matrix {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.crew-matrix-header {
    padding: 18px 24px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
}

.crew-matrix-header h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.crew-matrix-header i {
    color: var(--primary);
}

.crew-matrix-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 28px 24px 18px;
    flex-wrap: wrap;
}

.matrix-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 14px 18px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
    min-width: 100px;
}

.matrix-node:hover {
    border-color: var(--primary);
    background: var(--primary-subtle);
}

.matrix-icon {
    font-size: 1.1rem;
    color: var(--primary);
}

.matrix-node:hover .matrix-icon {
    color: var(--primary-dark);
}

.matrix-node strong {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-primary);
}

.matrix-node small {
    font-size: 0.68rem;
    color: var(--text-muted);
}

.matrix-arrow {
    color: var(--primary);
    font-size: 0.75rem;
    flex-shrink: 0;
    opacity: 0.6;
}

.crew-matrix-note {
    padding: 14px 24px 20px;
    font-size: 0.82rem;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.6;
}

/* ========== Enterprise Section ========== */
.enterprise-section {
    background: var(--bg-secondary);
}

.journey-path {
    display: flex;
    align-items: stretch;
    gap: 0;
    margin-bottom: 40px;
}

.journey-step {
    flex: 1;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

.journey-step:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

.step-marker {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
}

.step-number {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--primary);
    letter-spacing: -0.03em;
}

.step-content {
    padding: 24px;
}

.step-icon {
    width: 46px;
    height: 46px;
    border-radius: var(--radius-md);
    background: var(--primary-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    color: var(--primary);
    margin-bottom: 16px;
    transition: var(--transition);
}

.journey-step:hover .step-icon {
    background: var(--primary);
    color: white;
}

.step-content h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.step-content > p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 18px;
    line-height: 1.65;
}

.step-list {
    list-style: none;
}

.step-list li {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 6px 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.step-list li i {
    color: var(--accent-green);
    font-size: 0.75rem;
}

.journey-connector {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 56px;
    flex-shrink: 0;
}

.connector-line {
    width: 1.5px;
    flex: 1;
    background: var(--border-strong);
}

.connector-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.7rem;
    margin: 10px 0;
}

/* Lobster Card */
.lobster-card {
    display: flex;
    align-items: center;
    gap: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
}

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

.lobster-icon {
    font-size: 3.5rem;
    flex-shrink: 0;
}

.lobster-content h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.lobster-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ========== CTA Section ========== */
.cta-section {
    background: var(--bg-primary);
    padding: 72px 0;
}

.cta-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 56px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.cta-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent), var(--accent-green));
}

.cta-content {
    position: relative;
    z-index: 2;
}

.cta-content h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 6px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.cta-subtitle {
    font-size: 1rem;
    color: var(--primary);
    margin-bottom: 32px;
    font-weight: 500;
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: 28px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.cta-feature i {
    color: var(--accent-green);
    font-size: 0.85rem;
}

.cta-price {
    display: inline-flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 28px;
}

.price-label {
    color: var(--primary);
    font-weight: 700;
    font-size: 0.85rem;
}

.price-value {
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--text-primary);
    letter-spacing: -0.03em;
}

.price-value small {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}

.cta-members {
    margin-top: 14px;
}

.member-avatars {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 6px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.avatar-stack {
    display: flex;
}

.avatar {
    font-size: 1.4rem;
    margin-right: -6px;
}

.member-desc {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ========== Footer ========== */
.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border);
    padding: 36px 0;
}

.footer-content {
    text-align: center;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.footer-text {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-bottom: 3px;
}

.footer-credit {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    box-shadow: 0 4px 12px rgba(201, 100, 66, 0.25);
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px);
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(201, 100, 66, 0.35);
}

/* ========== Animations ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.8rem;
    }

    .use-cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .section-header-with-tabs {
        flex-direction: column;
        align-items: flex-start;
    }

    .agent-flow {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .flow-diagram {
        order: 2;
    }

    .agent-features {
        order: 1;
    }

    .scenario-detail-grid {
        grid-template-columns: 1fr 1fr;
    }

    .scenario-detail-grid .scenario-col:last-child {
        grid-column: 1 / -1;
    }

    .scenario-kpi,
    .scenario-kpi-row {
        position: static;
        margin-top: 16px;
    }

    .scenario-kpi-row {
        display: inline-flex;
    }

    .scenario-cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .crew-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .arch-cards-row {
        grid-template-columns: 1fr;
    }

    .journey-path {
        flex-direction: column;
    }

    .journey-connector {
        width: 100%;
        height: 48px;
        flex-direction: row;
    }

    .connector-line {
        height: 1.5px;
        width: auto;
    }

    .skills-grid-compact {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .nav-container {
        padding: 0 20px;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(253, 250, 246, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-toggle {
        display: block;
    }

    .hero {
        padding: 100px 20px 60px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-number {
        font-size: 1.6rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .section {
        padding: 56px 0;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .use-cases-grid {
        grid-template-columns: 1fr;
    }

    .scenario-tabs {
        gap: 4px;
    }

    .scenario-tab {
        padding: 5px 10px;
        font-size: 0.72rem;
    }

    .use-case-features {
        grid-template-columns: 1fr;
    }

    .scenario-cards-grid {
        grid-template-columns: 1fr;
    }

    .sc-card {
        padding: 22px;
    }

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

    .crew-matrix-flow {
        gap: 8px;
    }

    .matrix-node {
        min-width: 80px;
        padding: 10px 12px;
    }

    .scenario-modal {
        margin: 16px;
        max-height: 90vh;
    }

    .modal-content {
        padding: 24px;
    }

    .modal-tasks {
        grid-template-columns: 1fr;
    }

    .modal-kpi-row {
        flex-wrap: wrap;
    }

    .arch-cards-row {
        grid-template-columns: 1fr;
    }

    .skills-grid-compact {
        grid-template-columns: 1fr;
    }

    .skills-inline {
        padding: 20px;
    }

    .deploy-steps-row {
        flex-direction: column;
        gap: 12px;
    }

    .deploy-step-arrow {
        width: 100%;
        height: 24px;
        transform: rotate(90deg);
    }

    .agent-nodes-row {
        flex-direction: column;
        align-items: center;
    }

    .cta-card {
        padding: 36px 20px;
    }

    .cta-features {
        flex-direction: column;
        align-items: center;
    }

    .price-value {
        font-size: 2rem;
    }

    .lobster-card {
        flex-direction: column;
        text-align: center;
    }
}

/* ========== Auth Module ========== */
.nav-auth {
    display: flex;
    align-items: center;
    margin-left: 12px;
}

.auth-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 3px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--primary);
    background: transparent;
    color: var(--primary);
    transition: var(--transition);
    white-space: nowrap;
}

.auth-btn:hover {
    border-color: var(--primary);
    box-shadow: 0 2px 12px rgba(217, 119, 87, 0.3);
    transform: scale(1.05);
}

.auth-btn.logged-in {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(217, 119, 87, 0.15);
}

.auth-btn.logged-in:hover {
    box-shadow: 0 2px 12px rgba(217, 119, 87, 0.35);
    transform: scale(1.05);
}

/* OTP 验证码行 */
.auth-otp-row {
    display: flex;
    gap: 10px;
    align-items: flex-end;
    margin-bottom: 18px;
}
.auth-otp-row .auth-input-group {
    flex: 1;
    margin-bottom: 0;
}
.auth-otp-btn {
    padding: 12px 16px;
    background: var(--bg-secondary);
    color: var(--primary);
    border: 1.5px solid var(--primary);
    border-radius: var(--radius-md);
    font-size: 0.78rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
    flex-shrink: 0;
    min-width: 100px;
    text-align: center;
}
.auth-otp-btn:hover:not(:disabled) {
    background: var(--primary);
    color: white;
    box-shadow: 0 2px 8px rgba(217, 119, 87, 0.25);
}
.auth-otp-btn:disabled {
    background: var(--bg-muted);
    color: var(--text-muted);
    border-color: var(--border);
    cursor: not-allowed;
    opacity: 0.7;
}
.auth-otp-hint {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: -10px;
    margin-bottom: 14px;
    padding-left: 2px;
}
.auth-otp-hint i {
    color: var(--primary);
    margin-right: 4px;
}

.auth-btn .auth-avatar-sm {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 800;
}

/* 猫咪头像圆形样式 */
.auth-btn .auth-avatar-img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
}

/* Auth Modal */
.auth-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(20, 20, 19, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 3000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 32px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.auth-modal-overlay.active {
    display: flex;
    opacity: 1;
}

.auth-modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    max-width: 420px;
    width: 100%;
    position: relative;
    box-shadow: 0 24px 80px rgba(20, 20, 19, 0.15);
    animation: modalIn 0.35s ease;
    overflow: hidden;
}

.auth-modal .modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 10;
}

/* Auth Form */
.auth-form-header {
    text-align: center;
    padding: 36px 36px 24px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
}

.auth-logo {
    margin-bottom: 16px;
}

.auth-form-header h2 {
    font-family: 'Poppins', 'Noto Sans SC', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 6px;
}

.auth-form-header p {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 400;
}

.auth-form-body {
    padding: 28px 36px 36px;
}

.auth-input-group {
    margin-bottom: 18px;
}

.auth-input-group label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.auth-input-group label i {
    font-size: 0.72rem;
    color: var(--primary);
}

.auth-input-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-card);
    transition: var(--transition);
    outline: none;
}

.auth-input-group input::placeholder {
    color: var(--text-muted);
}

.auth-input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(217, 119, 87, 0.1);
}

.auth-error {
    font-size: 0.78rem;
    color: #d63031;
    margin-bottom: 12px;
    min-height: 20px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.auth-submit-btn {
    width: 100%;
    padding: 13px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--primary);
    color: white;
    font-size: 0.9rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
}

.auth-submit-btn:hover {
    background: var(--primary-dark);
    box-shadow: 0 4px 16px rgba(217, 119, 87, 0.3);
    transform: translateY(-1px);
}

.auth-submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.auth-divider {
    display: flex;
    align-items: center;
    margin: 20px 0;
    gap: 14px;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.auth-divider span {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.auth-anonymous-btn {
    width: 100%;
    padding: 12px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
}

.auth-anonymous-btn:hover {
    border-color: var(--secondary);
    color: var(--secondary);
    background: rgba(106, 155, 204, 0.06);
}

.auth-switch {
    text-align: center;
    margin-top: 20px;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.auth-switch a {
    color: var(--primary);
    font-weight: 700;
    cursor: pointer;
}

.auth-switch a:hover {
    text-decoration: underline;
}

/* Profile Panel */
.auth-avatar-large {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: #f5f0eb;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin: 0 auto 14px;
    box-shadow: 0 4px 16px rgba(217, 119, 87, 0.25);
    overflow: hidden;
}

.auth-avatar-large-img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.auth-profile-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.profile-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.profile-item:hover {
    border-color: var(--primary);
}

.profile-item > i {
    color: var(--primary);
    font-size: 0.9rem;
    width: 18px;
    text-align: center;
    flex-shrink: 0;
}

.profile-label {
    display: block;
    font-size: 0.68rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.profile-value {
    display: block;
    font-size: 0.82rem;
    color: var(--text-primary);
    font-weight: 500;
    word-break: break-all;
}

.auth-logout-btn {
    width: 100%;
    padding: 12px;
    border: 1.5px solid #d63031;
    border-radius: var(--radius-md);
    background: transparent;
    color: #d63031;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
}

.auth-logout-btn:hover {
    background: #d63031;
    color: white;
    box-shadow: 0 4px 12px rgba(214, 48, 49, 0.2);
}

/* Auth loading spinner */
.auth-spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Auth responsive */
@media (max-width: 768px) {
    .nav-auth {
        margin-left: 8px;
    }

    .auth-btn {
        padding: 2px;
    }

    .auth-btn .auth-avatar-img {
        width: 28px;
        height: 28px;
    }

    .auth-modal {
        margin: 12px;
    }

    .auth-form-header {
        padding: 30px 24px 20px;
    }

    .auth-form-body {
        padding: 24px;
    }
}

/* ========== Smooth scrollbar styling ========== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* ========== Sub-page Hero Banner ========== */
.subpage-hero {
    padding: 140px 32px 48px;
    background: var(--bg-hero);
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--border);
}

.subpage-hero::before {
    content: '';
    position: absolute;
    top: -80px;
    right: -120px;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: var(--primary-subtle);
    filter: blur(100px);
    opacity: 0.5;
    pointer-events: none;
}

.subpage-hero::after {
    content: '';
    position: absolute;
    bottom: -60px;
    left: -80px;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: #E8D5C0;
    filter: blur(100px);
    opacity: 0.3;
    pointer-events: none;
}

.subpage-hero .section-header {
    position: relative;
    z-index: 2;
    margin-bottom: 0;
}

.subpage-hero .section-tag {
    margin-bottom: 16px;
}

.subpage-hero .section-title {
    font-size: 2.8rem;
    margin-bottom: 14px;
}

.subpage-hero .section-desc {
    font-size: 1.1rem;
    max-width: 560px;
}

/* ========== Section Divider ========== */
.section-divider {
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
    margin: 0;
}

/* ========== Changelog Section ========== */
.changelog-section {
    min-height: calc(100vh - 64px);
    padding-top: 56px;
    padding-bottom: 64px;
    background: var(--bg-primary);
}

.changelog-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 60px 0;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 400;
}

.changelog-timeline {
    position: relative;
    padding-left: 48px;
    max-width: 800px;
    margin: 0 auto;
}

.changelog-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 18px;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--border), transparent);
    border-radius: 1px;
}

.changelog-item {
    position: relative;
    margin-bottom: 32px;
    animation: fadeInUp 0.4s ease both;
}

.changelog-item:last-child {
    margin-bottom: 0;
}

.changelog-item::before {
    content: '';
    position: absolute;
    left: -38px;
    top: 22px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 3px solid var(--primary);
    z-index: 1;
    box-shadow: 0 0 0 4px var(--bg-primary);
}

.changelog-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

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

.changelog-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 24px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
}

.changelog-version {
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.03em;
    white-space: nowrap;
    text-transform: uppercase;
}

.changelog-version.feature {
    background: var(--primary-subtle);
    color: var(--primary);
}

.changelog-version.improvement {
    background: rgba(106, 155, 204, 0.1);
    color: var(--secondary);
}

.changelog-version.fix {
    background: rgba(120, 140, 93, 0.1);
    color: var(--accent-green);
}

.changelog-card-header h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    flex: 1;
    letter-spacing: -0.01em;
}

.changelog-date {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: 500;
    white-space: nowrap;
}

.changelog-date i {
    margin-right: 4px;
    font-size: 0.68rem;
}

.changelog-card-body {
    padding: 18px 24px;
}

.changelog-card-body ul {
    list-style: none;
    margin: 0;
}

.changelog-card-body li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 5px 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.changelog-card-body li::before {
    content: '';
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--primary);
    flex-shrink: 0;
    margin-top: 9px;
    opacity: 0.7;
}

/* Changelog Stats Bar */
.changelog-stats-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    padding: 20px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    box-shadow: var(--shadow-sm);
}

.changelog-stat {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.changelog-stat i {
    color: var(--primary);
    font-size: 0.9rem;
}

.changelog-stat strong {
    color: var(--text-primary);
    font-weight: 800;
    font-size: 1.1rem;
}

/* ========== Diary Section ========== */
.diary-section {
    min-height: calc(100vh - 64px);
    padding-top: 56px;
    padding-bottom: 64px;
    background: var(--bg-primary);
}

.diary-auth-prompt {
    display: flex;
    justify-content: center;
    padding: 60px 0 40px;
}

.diary-auth-card {
    text-align: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 56px 48px;
    max-width: 420px;
    width: 100%;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.diary-auth-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--border-strong);
}

.diary-auth-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    background: var(--primary-subtle);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin: 0 auto 20px;
    transition: var(--transition);
}

.diary-auth-card:hover .diary-auth-icon {
    background: var(--primary);
    color: white;
}

.diary-auth-card h3 {
    font-family: 'Poppins', 'Noto Sans SC', sans-serif;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.diary-auth-card p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 28px;
    line-height: 1.6;
}

/* Diary Panel */
.diary-panel {
    max-width: 800px;
    margin: 0 auto;
}

.diary-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.diary-new-btn {
    gap: 6px;
}

.diary-stats {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 500;
}

.diary-stats i {
    color: var(--primary);
    margin-right: 4px;
    font-size: 0.78rem;
}

/* Diary List */
.diary-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.diary-empty {
    text-align: center;
    padding: 60px 0;
    color: var(--text-muted);
}

.diary-empty i {
    font-size: 2rem;
    color: var(--border-strong);
    margin-bottom: 14px;
    display: block;
}

.diary-empty p {
    font-size: 0.875rem;
}

/* Diary Card */
.diary-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
    cursor: default;
}

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

.diary-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.diary-card-meta {
    display: flex;
    align-items: center;
    gap: 10px;
}

.diary-card-date {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.diary-card-date i {
    margin-right: 4px;
    font-size: 0.68rem;
}

.diary-mood-badge {
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 0.68rem;
    font-weight: 700;
    background: var(--primary-subtle);
    color: var(--primary);
    letter-spacing: 0.02em;
}

.diary-card-actions {
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: var(--transition);
}

.diary-card:hover .diary-card-actions {
    opacity: 1;
}

.diary-card-actions button {
    width: 30px;
    height: 30px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--bg-surface);
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
    transition: var(--transition);
}

.diary-card-actions button:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-subtle);
}

.diary-card-actions button.delete-btn:hover {
    border-color: #d63031;
    color: #d63031;
    background: rgba(214, 48, 49, 0.06);
}

.diary-card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.diary-card-content {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
    white-space: pre-wrap;
    max-height: 120px;
    overflow: hidden;
    position: relative;
}

.diary-card-content.expanded {
    max-height: none;
}

.diary-card-content::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40px;
    background: linear-gradient(transparent, var(--bg-card));
    pointer-events: none;
}

.diary-card-content.expanded::after {
    display: none;
}

.diary-card-expand {
    margin-top: 8px;
    font-size: 0.78rem;
    color: var(--primary);
    font-weight: 600;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    font-family: inherit;
    transition: var(--transition);
}

.diary-card-expand:hover {
    color: var(--primary-dark);
}

/* Diary Editor Modal */
.diary-editor-overlay {
    position: fixed;
    inset: 0;
    background: rgba(20, 20, 19, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 3000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 32px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.diary-editor-overlay.active {
    display: flex;
    opacity: 1;
}

.diary-editor-modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 24px 80px rgba(20, 20, 19, 0.15);
    animation: modalIn 0.35s ease;
}

.diary-editor-content {
    padding: 0;
}

.diary-editor-header {
    padding: 32px 36px 20px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
}

.diary-editor-header h2 {
    font-family: 'Poppins', 'Noto Sans SC', sans-serif;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: -0.02em;
}

.diary-editor-header p {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-weight: 400;
}

.diary-editor-body {
    padding: 28px 36px 36px;
}

.diary-input-group {
    margin-bottom: 20px;
}

.diary-input-group label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.diary-input-group label i {
    font-size: 0.68rem;
    color: var(--primary);
}

.diary-input-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-card);
    transition: var(--transition);
    outline: none;
}

.diary-input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(217, 119, 87, 0.1);
}

.diary-input-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-family: inherit;
    color: var(--text-primary);
    background: var(--bg-card);
    transition: var(--transition);
    outline: none;
    resize: vertical;
    line-height: 1.7;
    min-height: 200px;
}

.diary-input-group textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(217, 119, 87, 0.1);
}

.diary-input-group input::placeholder,
.diary-input-group textarea::placeholder {
    color: var(--text-muted);
}

/* Mood Selector */
.diary-mood-selector {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.mood-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 7px 14px;
    border-radius: var(--radius-full);
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    border: 1.5px solid var(--border);
    background: var(--bg-card);
    color: var(--text-secondary);
    transition: var(--transition);
    font-family: inherit;
}

.mood-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-subtle);
}

.mood-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 2px 8px rgba(217, 119, 87, 0.2);
}

.mood-btn i {
    font-size: 0.75rem;
}

.diary-editor-error {
    font-size: 0.78rem;
    color: #d63031;
    margin-bottom: 12px;
    min-height: 20px;
}

.diary-editor-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

/* Diary & Changelog Responsive */
@media (max-width: 768px) {
    .nav-links-inline {
        gap: 1px;
        padding: 3px;
    }

    .nav-link-item {
        padding: 5px 14px;
        font-size: 0.76rem;
    }

    .changelog-section,
    .diary-section {
        padding-top: 40px;
    }

    .subpage-hero {
        padding: 120px 20px 36px;
    }

    .subpage-hero .section-title {
        font-size: 2rem;
    }

    .subpage-hero .section-desc {
        font-size: 0.95rem;
    }

    .changelog-stats-bar {
        flex-direction: column;
        gap: 12px;
        padding: 16px 20px;
    }

    .changelog-timeline {
        padding-left: 30px;
    }

    .changelog-timeline::before {
        left: 10px;
    }

    .changelog-item::before {
        left: -28px;
        width: 10px;
        height: 10px;
    }

    .changelog-card-header {
        flex-wrap: wrap;
        gap: 8px;
    }

    .diary-toolbar {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .diary-card-actions {
        opacity: 1;
    }

    .diary-editor-modal {
        margin: 12px;
    }

    .diary-editor-header,
    .diary-editor-body {
        padding-left: 24px;
        padding-right: 24px;
    }

    .diary-mood-selector {
        gap: 4px;
    }

    .mood-btn {
        padding: 5px 10px;
        font-size: 0.72rem;
    }

    .diary-auth-card {
        padding: 40px 28px;
    }
}