/* ============================================
   智能学术写作系统 - Landing Page 2.0
   全面重新设计 - 商业化产品展示
   ============================================ */

/* ============================================
   1. 全局样式与变量
   ============================================ */

:root {
    --landing-primary: #1e3a5f;
    --landing-primary-light: #2d5a8e;
    --landing-primary-dark: #0f1f33;
    --landing-accent: #3b82f6;
    --landing-accent-light: #60a5fa;
    --landing-accent-glow: rgba(59, 130, 246, 0.3);
    --landing-surface: #ffffff;
    --landing-surface-alt: #f8fafc;
    --landing-surface-raised: #ffffff;
    --landing-text: #0f172a;
    --landing-text-secondary: #475569;
    --landing-text-tertiary: #94a3b8;
    --landing-border: #e2e8f0;
    --landing-border-light: #f1f5f9;
    --landing-radius: 16px;
    --landing-radius-lg: 24px;
    --landing-radius-xl: 32px;
    --landing-shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --landing-shadow: 0 4px 16px rgba(0,0,0,0.06);
    --landing-shadow-lg: 0 12px 40px rgba(0,0,0,0.1);
    --landing-shadow-xl: 0 24px 64px rgba(0,0,0,0.12);
    --landing-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.landing-page {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--landing-text);
    background: var(--landing-surface);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.landing-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--landing-accent);
    color: #fff;
    padding: 8px 16px;
    z-index: 9999;
    transition: top 0.2s;
}
.skip-link:focus { top: 0; }

.hide-mobile { display: inline; }
@media (max-width: 768px) { .hide-mobile { display: none; } }

/* ============================================
   2. 导航栏
   ============================================ */

.landing-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid transparent;
    z-index: 1000;
    transition: all var(--landing-transition);
}

.landing-header.scrolled {
    background: rgba(255,255,255,0.95);
    border-bottom-color: var(--landing-border);
    box-shadow: var(--landing-shadow-sm);
}

.landing-header-container {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}

.landing-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.landing-brand-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--landing-primary), var(--landing-primary-light));
    border-radius: 12px;
    color: #fff;
    font-size: 18px;
    flex-shrink: 0;
}

.landing-brand-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--landing-text);
    white-space: nowrap;
}

.landing-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.landing-nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--landing-text-secondary);
    text-decoration: none;
    transition: color 0.2s;
    position: relative;
}
.landing-nav-link:hover {
    color: var(--landing-accent);
    text-decoration: none;
}
.landing-nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--landing-accent);
    border-radius: 1px;
    transition: width 0.2s;
}
.landing-nav-link:hover::after { width: 100%; }

.landing-header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.landing-mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: transparent;
    border: none;
    color: var(--landing-text-secondary);
    cursor: pointer;
    font-size: 20px;
}

/* ============================================
   3. 按钮系统
   ============================================ */

.landing-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.5;
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    border-radius: 12px;
    transition: all 0.2s;
    text-decoration: none;
}
.landing-btn:focus-visible {
    outline: 2px solid var(--landing-accent);
    outline-offset: 2px;
}

.landing-btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--landing-accent), #2563eb);
    border-color: var(--landing-accent);
    box-shadow: 0 2px 8px var(--landing-accent-glow);
}
.landing-btn-primary:hover {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px var(--landing-accent-glow);
    text-decoration: none;
    color: #fff;
}

.landing-btn-ghost {
    color: var(--landing-text-secondary);
    background: transparent;
    border-color: transparent;
}
.landing-btn-ghost:hover {
    background: var(--landing-surface-alt);
    color: var(--landing-text);
    text-decoration: none;
}

.landing-btn-outline-light {
    color: #fff;
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.3);
    backdrop-filter: blur(8px);
}
.landing-btn-outline-light:hover {
    background: rgba(255,255,255,0.15);
    border-color: rgba(255,255,255,0.5);
    text-decoration: none;
    color: #fff;
}

.landing-btn-lg {
    padding: 14px 28px;
    font-size: 16px;
    border-radius: 14px;
}

.landing-btn-xl {
    padding: 18px 36px;
    font-size: 18px;
    border-radius: 16px;
}

.landing-btn-block { width: 100%; }

.landing-btn-cta-primary {
    color: var(--landing-primary);
    background: #fff;
    border-color: #fff;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}
.landing-btn-cta-primary:hover {
    background: #f0f7ff;
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    text-decoration: none;
    color: var(--landing-primary);
}

.landing-btn-cta-secondary {
    color: #fff;
    background: transparent;
    border-color: rgba(255,255,255,0.4);
}
.landing-btn-cta-secondary:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.6);
    text-decoration: none;
    color: #fff;
}

/* ============================================
   4. Hero 区域
   ============================================ */

.landing-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 24px 60px;
    background: linear-gradient(160deg, var(--landing-primary-dark) 0%, var(--landing-primary) 40%, var(--landing-primary-light) 100%);
    overflow: hidden;
}

.landing-hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.landing-hero-particles {
    position: absolute;
    inset: 0;
}

.landing-hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.landing-hero-container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.landing-hero-content {
    color: #fff;
}

.landing-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 24px;
    backdrop-filter: blur(8px);
}
.landing-hero-badge i {
    color: var(--landing-accent-light);
}

.landing-hero-title {
    font-size: 52px;
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.landing-hero-title-accent {
    background: linear-gradient(135deg, var(--landing-accent-light), #93c5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.landing-hero-subtitle {
    font-size: 18px;
    line-height: 1.7;
    opacity: 0.85;
    margin-bottom: 36px;
    max-width: 520px;
}

.landing-hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.landing-hero-trust {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.landing-hero-trust-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    opacity: 0.75;
}
.landing-hero-trust-item i { color: var(--landing-accent-light); }

.landing-hero-trust-divider {
    width: 1px;
    height: 16px;
    background: rgba(255,255,255,0.2);
}

/* Hero 产品界面预览 */

.landing-hero-visual {
    perspective: 1200px;
}

.landing-hero-mockup {
    transform: rotateY(-5deg) rotateX(3deg);
    transition: transform 0.6s ease;
}
.landing-hero-mockup:hover {
    transform: rotateY(-2deg) rotateX(1deg);
}

.mockup-browser {
    background: var(--landing-surface);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 32px 80px rgba(0,0,0,0.3), 0 0 0 1px rgba(255,255,255,0.1);
}

.mockup-browser-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: #f1f5f9;
    border-bottom: 1px solid var(--landing-border);
}

.mockup-browser-dots {
    display: flex;
    gap: 6px;
}
.mockup-browser-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #cbd5e1;
}
.mockup-browser-dots span:nth-child(1) { background: #fca5a5; }
.mockup-browser-dots span:nth-child(2) { background: #fde68a; }
.mockup-browser-dots span:nth-child(3) { background: #86efac; }

.mockup-browser-url {
    flex: 1;
    padding: 4px 12px;
    background: #fff;
    border-radius: 6px;
    font-size: 11px;
    color: var(--landing-text-tertiary);
    font-family: 'JetBrains Mono', monospace;
}

.mockup-browser-content {
    display: flex;
    min-height: 280px;
}

.mockup-sidebar {
    width: 160px;
    padding: 12px 8px;
    background: #f8fafc;
    border-right: 1px solid var(--landing-border);
    flex-shrink: 0;
}

.mockup-sidebar-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    font-size: 12px;
    color: var(--landing-text-secondary);
    border-radius: 8px;
    margin-bottom: 2px;
}
.mockup-sidebar-item.active {
    background: #eff6ff;
    color: var(--landing-accent);
    font-weight: 600;
}
.mockup-sidebar-item i { width: 14px; text-align: center; font-size: 11px; }

.mockup-main {
    flex: 1;
    padding: 16px;
}

.mockup-card {
    background: #fff;
    border: 1px solid var(--landing-border);
    border-radius: 10px;
    padding: 14px;
    margin-bottom: 12px;
}

.mockup-card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--landing-text);
    margin-bottom: 10px;
}

.mockup-card-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}
.mockup-card-dot.green { background: #22c55e; }

.mockup-progress {
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 12px;
}

.mockup-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--landing-accent), #60a5fa);
    border-radius: 3px;
    transition: width 1.5s ease;
}

.mockup-text-line {
    height: 8px;
    background: #f1f5f9;
    border-radius: 4px;
    margin-bottom: 6px;
}

.mockup-stats-row {
    display: flex;
    gap: 12px;
}

.mockup-stat-mini {
    flex: 1;
    background: #fff;
    border: 1px solid var(--landing-border);
    border-radius: 10px;
    padding: 12px;
    text-align: center;
}

.mockup-stat-value {
    font-size: 18px;
    font-weight: 800;
    color: var(--landing-text);
}

.mockup-stat-label {
    font-size: 10px;
    color: var(--landing-text-tertiary);
    margin-top: 2px;
}

/* ============================================
   5. 动画效果
   ============================================ */

.fade-in {
    animation: fadeInUp 0.8s ease-out forwards;
    opacity: 0;
}
.fade-in-delay-1 { animation-delay: 0.15s; }
.fade-in-delay-2 { animation-delay: 0.3s; }
.fade-in-delay-3 { animation-delay: 0.45s; }
.fade-in-delay-4 { animation-delay: 0.6s; }

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

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.animate-on-scroll.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   6. 数据指标信任区
   ============================================ */

.landing-metrics {
    padding: 48px 0;
    background: var(--landing-surface);
    border-bottom: 1px solid var(--landing-border-light);
}

.landing-metrics-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
}

.landing-metric-item {
    flex: 1;
    text-align: center;
    padding: 0 32px;
}

.landing-metric-value {
    font-size: 40px;
    font-weight: 900;
    color: var(--landing-primary);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.landing-metric-label {
    font-size: 14px;
    color: var(--landing-text-tertiary);
    margin-top: 4px;
}

.landing-metric-divider {
    width: 1px;
    height: 48px;
    background: var(--landing-border);
    flex-shrink: 0;
}

/* ============================================
   7. 通用 Section 样式
   ============================================ */

.landing-section-header {
    text-align: center;
    margin-bottom: 64px;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.landing-section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    background: #eff6ff;
    color: var(--landing-accent);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 16px;
}
.landing-section-tag i { font-size: 12px; }

.landing-section-title {
    font-size: 40px;
    font-weight: 800;
    color: var(--landing-text);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.landing-section-subtitle {
    font-size: 17px;
    color: var(--landing-text-secondary);
    line-height: 1.7;
}

/* ============================================
   8. 核心能力区
   ============================================ */

.landing-capabilities {
    padding: 100px 0;
    background: var(--landing-surface-alt);
}

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

.landing-capability-card {
    background: var(--landing-surface-raised);
    border: 1px solid var(--landing-border);
    border-radius: var(--landing-radius);
    padding: 32px;
    transition: all var(--landing-transition);
    position: relative;
    overflow: hidden;
}
.landing-capability-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: 3px 3px 0 0;
    transition: height var(--landing-transition);
}
.landing-capability-card[data-accent="blue"]::before { background: var(--landing-accent); }
.landing-capability-card[data-accent="green"]::before { background: #22c55e; }
.landing-capability-card[data-accent="purple"]::before { background: #8b5cf6; }
.landing-capability-card[data-accent="orange"]::before { background: #f59e0b; }
.landing-capability-card[data-accent="teal"]::before { background: #14b8a6; }
.landing-capability-card[data-accent="rose"]::before { background: #f43f5e; }

.landing-capability-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--landing-shadow-lg);
    border-color: transparent;
}
.landing-capability-card:hover::before { height: 4px; }

.landing-capability-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    font-size: 24px;
    margin-bottom: 20px;
}
.landing-capability-card[data-accent="blue"] .landing-capability-icon { background: #eff6ff; color: var(--landing-accent); }
.landing-capability-card[data-accent="green"] .landing-capability-icon { background: #f0fdf4; color: #22c55e; }
.landing-capability-card[data-accent="purple"] .landing-capability-icon { background: #f5f3ff; color: #8b5cf6; }
.landing-capability-card[data-accent="orange"] .landing-capability-icon { background: #fffbeb; color: #f59e0b; }
.landing-capability-card[data-accent="teal"] .landing-capability-icon { background: #f0fdfa; color: #14b8a6; }
.landing-capability-card[data-accent="rose"] .landing-capability-icon { background: #fff1f2; color: #f43f5e; }

.landing-capability-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 600;
    margin-bottom: 12px;
}
.landing-capability-card[data-accent="blue"] .landing-capability-badge { background: #eff6ff; color: var(--landing-accent); }
.landing-capability-card[data-accent="green"] .landing-capability-badge { background: #f0fdf4; color: #16a34a; }
.landing-capability-card[data-accent="purple"] .landing-capability-badge { background: #f5f3ff; color: #7c3aed; }
.landing-capability-card[data-accent="orange"] .landing-capability-badge { background: #fffbeb; color: #d97706; }
.landing-capability-card[data-accent="teal"] .landing-capability-badge { background: #f0fdfa; color: #0d9488; }
.landing-capability-card[data-accent="rose"] .landing-capability-badge { background: #fff1f2; color: #e11d48; }

.landing-capability-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--landing-text);
    margin-bottom: 10px;
}

.landing-capability-desc {
    font-size: 14px;
    color: var(--landing-text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.landing-capability-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.landing-capability-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 0;
    font-size: 13px;
    color: var(--landing-text-secondary);
}
.landing-capability-features li i {
    color: var(--landing-accent);
    font-size: 10px;
    flex-shrink: 0;
}

/* ============================================
   9. 工作流程区
   ============================================ */

.landing-workflow {
    padding: 100px 0;
    background: var(--landing-surface);
}

.landing-workflow-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    position: relative;
}

.landing-workflow-step {
    text-align: center;
    position: relative;
    padding: 32px 20px;
}

.landing-workflow-number {
    font-size: 64px;
    font-weight: 900;
    color: var(--landing-border-light);
    line-height: 1;
    margin-bottom: 16px;
    letter-spacing: -0.04em;
}

.landing-workflow-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--landing-accent), #2563eb);
    border-radius: 20px;
    color: #fff;
    font-size: 24px;
    margin: 0 auto 20px;
    box-shadow: 0 8px 24px var(--landing-accent-glow);
}

.landing-workflow-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--landing-text);
    margin-bottom: 10px;
}

.landing-workflow-desc {
    font-size: 14px;
    color: var(--landing-text-secondary);
    line-height: 1.7;
}

.landing-workflow-connector {
    position: absolute;
    top: 50%;
    right: -16px;
    width: 32px;
    height: 2px;
    background: linear-gradient(90deg, var(--landing-accent), transparent);
    transform: translateY(-40px);
}
.landing-workflow-step:last-child .landing-workflow-connector { display: none; }

/* ============================================
   10. 差异化优势区
   ============================================ */

.landing-advantages {
    padding: 100px 0;
    background: var(--landing-surface-alt);
}

.landing-advantages-compare {
    display: flex;
    align-items: stretch;
    gap: 0;
    max-width: 900px;
    margin: 0 auto;
    border-radius: var(--landing-radius-lg);
    overflow: hidden;
    box-shadow: var(--landing-shadow-lg);
}

.landing-advantages-col {
    flex: 1;
    padding: 40px;
}

.landing-advantages-old {
    background: #fef2f2;
}

.landing-advantages-new {
    background: #f0fdf4;
}

.landing-advantages-col-header {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(0,0,0,0.06);
}
.landing-advantages-old .landing-advantages-col-header { color: #991b1b; }
.landing-advantages-new .landing-advantages-col-header { color: #166534; }

.landing-advantages-vs {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    background: var(--landing-surface-raised);
    flex-shrink: 0;
}
.landing-advantages-vs span {
    font-size: 16px;
    font-weight: 900;
    color: var(--landing-text-tertiary);
}

.landing-advantages-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.landing-advantages-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 0;
    font-size: 14px;
    line-height: 1.5;
}
.landing-advantages-list li i {
    margin-top: 3px;
    flex-shrink: 0;
}

.landing-advantages-list li.disadvantage { color: #991b1b; }
.landing-advantages-list li.disadvantage i { color: #ef4444; }
.landing-advantages-list li.advantage { color: #166534; }
.landing-advantages-list li.advantage i { color: #22c55e; }

/* ============================================
   11. 应用场景区
   ============================================ */

.landing-scenarios {
    padding: 100px 0;
    background: var(--landing-surface);
}

.landing-scenarios-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.landing-scenario-card {
    background: var(--landing-surface-raised);
    border: 1px solid var(--landing-border);
    border-radius: var(--landing-radius);
    overflow: hidden;
    transition: all var(--landing-transition);
}
.landing-scenario-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--landing-shadow-lg);
    border-color: transparent;
}

.landing-scenario-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
    background: #1e293b;
}
.landing-scenario-image svg {
    width: 100%;
    height: 100%;
    display: block;
    transition: transform 0.5s;
}
.landing-scenario-card:hover .landing-scenario-image svg {
    transform: scale(1.05);
}

.landing-scenario-body {
    padding: 28px;
}

.landing-scenario-tag {
    display: inline-block;
    padding: 3px 10px;
    background: #eff6ff;
    color: var(--landing-accent);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 12px;
}

.landing-scenario-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--landing-text);
    margin-bottom: 10px;
}

.landing-scenario-desc {
    font-size: 14px;
    color: var(--landing-text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.landing-scenario-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.landing-scenario-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 5px 0;
    font-size: 13px;
    color: var(--landing-text-secondary);
}
.landing-scenario-list li i {
    color: #22c55e;
    font-size: 10px;
}

/* ============================================
   12. 用户评价区
   ============================================ */

.landing-testimonials {
    padding: 100px 0;
    background: var(--landing-surface-alt);
}

.landing-testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.landing-testimonial-card {
    background: var(--landing-surface-raised);
    border: 1px solid var(--landing-border);
    border-radius: var(--landing-radius);
    padding: 32px;
    transition: all var(--landing-transition);
}
.landing-testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--landing-shadow-lg);
}

.landing-testimonial-rating {
    display: flex;
    gap: 3px;
    margin-bottom: 16px;
}
.landing-testimonial-rating i {
    color: #f59e0b;
    font-size: 14px;
}

.landing-testimonial-content {
    font-size: 15px;
    color: var(--landing-text);
    line-height: 1.8;
    margin-bottom: 24px;
    font-style: italic;
}

.landing-testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.landing-testimonial-avatar {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--landing-accent), #2563eb);
    border-radius: 50%;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    flex-shrink: 0;
}

.landing-testimonial-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--landing-text);
}

.landing-testimonial-role {
    font-size: 13px;
    color: var(--landing-text-tertiary);
}

/* ============================================
   13. CTA 行动召唤区
   ============================================ */

.landing-cta {
    padding: 100px 0;
    background: linear-gradient(160deg, var(--landing-primary-dark) 0%, var(--landing-primary) 50%, var(--landing-primary-light) 100%);
    position: relative;
    overflow: hidden;
}
.landing-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
}

.landing-cta-content {
    text-align: center;
    color: #fff;
    position: relative;
    z-index: 1;
}

.landing-cta-title {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.landing-cta-subtitle {
    font-size: 18px;
    opacity: 0.85;
    margin-bottom: 40px;
    line-height: 1.7;
}

.landing-cta-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.landing-cta-guarantees {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.landing-cta-guarantee {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    opacity: 0.8;
}
.landing-cta-guarantee i { font-size: 16px; }

/* ============================================
   14. Footer
   ============================================ */

.landing-footer {
    background: var(--landing-primary-dark);
    color: #fff;
    padding: 64px 0 32px;
}

.landing-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    margin-bottom: 48px;
}

.landing-footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.landing-footer-brand-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.1);
    border-radius: 12px;
    font-size: 18px;
}

.landing-footer-brand-title {
    font-size: 16px;
    font-weight: 700;
}

.landing-footer-brand-desc {
    font-size: 12px;
    opacity: 0.6;
}

.landing-footer-desc {
    font-size: 14px;
    line-height: 1.7;
    opacity: 0.7;
}

.landing-footer-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
}

.landing-footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}
.landing-footer-links li { margin-bottom: 8px; }
.landing-footer-links a {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    transition: color 0.2s;
}
.landing-footer-links a:hover {
    color: #fff;
    text-decoration: underline;
}

.landing-footer-contact {
    list-style: none;
    padding: 0;
    margin: 0;
}
.landing-footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 14px;
    opacity: 0.7;
}
.landing-footer-contact li i { width: 16px; text-align: center; }

.landing-footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.landing-footer-copyright {
    font-size: 13px;
    opacity: 0.5;
}

.landing-footer-legal {
    display: flex;
    gap: 24px;
}
.landing-footer-legal a {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    text-decoration: none;
    transition: color 0.2s;
}
.landing-footer-legal a:hover {
    color: #fff;
}

/* ============================================
   15. 移动端菜单
   ============================================ */

.landing-mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--landing-surface);
    z-index: 1001;
    transition: right var(--landing-transition);
    display: flex;
    flex-direction: column;
    box-shadow: var(--landing-shadow-xl);
}

.landing-mobile-menu.active { right: 0; }

.landing-mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--landing-border);
}

.landing-mobile-menu-close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: transparent;
    border: none;
    color: var(--landing-text-secondary);
    cursor: pointer;
    font-size: 18px;
}

.landing-mobile-nav {
    flex: 1;
    padding: 16px 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.landing-mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--landing-text-secondary);
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.2s;
}
.landing-mobile-nav-link:hover {
    background: var(--landing-surface-alt);
    color: var(--landing-text);
    text-decoration: none;
}
.landing-mobile-nav-link i { width: 20px; text-align: center; font-size: 14px; }

.landing-mobile-actions {
    padding: 20px;
    border-top: 1px solid var(--landing-border);
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.landing-mobile-menu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--landing-transition);
}
.landing-mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   16. 响应式设计
   ============================================ */

@media (max-width: 1200px) {
    .landing-hero-container {
        gap: 40px;
    }
    .landing-hero-title {
        font-size: 44px;
    }
    .mockup-sidebar {
        width: 130px;
    }
}

@media (max-width: 1024px) {
    .landing-nav { display: none; }
    .landing-header-actions { display: none; }
    .landing-mobile-menu-btn { display: flex; }
    
    .landing-hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .landing-hero-subtitle { margin-left: auto; margin-right: auto; }
    .landing-hero-actions { justify-content: center; }
    .landing-hero-trust { justify-content: center; }
    .landing-hero-visual { max-width: 600px; margin: 0 auto; }
    .landing-hero-mockup { transform: none; }
    
    .landing-capabilities-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .landing-workflow-steps {
        grid-template-columns: repeat(2, 1fr);
    }
    .landing-workflow-connector { display: none; }
    
    .landing-scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .landing-testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .landing-footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .landing-hero {
        padding: 80px 20px 40px;
        min-height: auto;
    }
    .landing-hero-title { font-size: 36px; }
    .landing-hero-subtitle { font-size: 16px; }
    .landing-hero-actions { flex-direction: column; align-items: center; }
    .landing-hero-trust { flex-direction: column; gap: 8px; }
    .landing-hero-trust-divider { display: none; }
    
    .landing-metrics-grid { flex-direction: column; gap: 24px; }
    .landing-metric-divider { width: 48px; height: 1px; }
    .landing-metric-value { font-size: 32px; }
    
    .landing-section-title { font-size: 30px; }
    .landing-section-subtitle { font-size: 15px; }
    
    .landing-capabilities-grid { grid-template-columns: 1fr; }
    .landing-workflow-steps { grid-template-columns: 1fr; }
    
    .landing-advantages-compare { flex-direction: column; }
    .landing-advantages-vs { width: 100%; height: 48px; }
    .landing-advantages-col { padding: 28px; }
    
    .landing-scenarios-grid { grid-template-columns: 1fr; }
    .landing-testimonials-grid { grid-template-columns: 1fr; }
    
    .landing-cta-title { font-size: 30px; }
    .landing-cta-subtitle { font-size: 16px; }
    .landing-cta-actions { flex-direction: column; align-items: center; }
    .landing-cta-guarantees { flex-direction: column; gap: 12px; }
    
    .landing-footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .landing-footer-bottom { flex-direction: column; gap: 16px; text-align: center; }
    .landing-footer-legal { flex-direction: column; gap: 8px; }
}

@media (max-width: 480px) {
    .landing-container { padding: 0 16px; }
    .landing-hero-title { font-size: 28px; }
    .landing-hero-badge { font-size: 12px; }
    .landing-btn-xl { padding: 14px 28px; font-size: 16px; }
    .landing-section-title { font-size: 26px; }
    .landing-capability-card { padding: 24px; }
    .mockup-sidebar { display: none; }
}

/* ============================================
   17. 打印样式
   ============================================ */

@media print {
    .landing-header,
    .landing-mobile-menu,
    .landing-mobile-menu-overlay { display: none; }
    .landing-hero { min-height: auto; padding: 40px; }
    .landing-cta { background: var(--landing-primary); }
}