/* ==================== 着陆页样式 ==================== */
#landingPage {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding-top: 52px; /* 补偿固定导航栏高度 */
}

/* 着陆页视图容器 */
.landing-view {
    display: none;
    height: 100%;
}

.landing-view.active {
    display: flex;
    flex-direction: column;
}

/* 着陆页导航栏 */
.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 52px;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.landing-nav.nav-hidden {
    transform: translateY(-100%);
}

[data-theme="dark"] .landing-nav {
    background: rgba(29, 29, 31, 0.72);
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

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

.landing-nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
}

.landing-nav-logo .logo-icon {
    width: 32px;
    height: 32px;
}

.landing-nav-logo .logo-text {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.landing-nav-links {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 40px;
}

.landing-nav-link {
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.landing-nav-link:hover {
    color: var(--text-primary);
}

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

.landing-nav-btn {
    padding: 8px 16px;
    font-size: 14px;
    border-radius: 980px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    background: transparent;
    color: var(--text-primary);
}

.landing-nav-btn:hover {
    background: var(--input-bg);
}

.landing-nav-btn.primary {
    background: var(--primary);
    color: white;
}

.landing-nav-btn.primary:hover {
    background: var(--primary-dark);
}

.landing-nav-btn.lang-toggle {
    background: transparent;
    border: 1px solid var(--border);
}

.landing-nav-btn.lang-toggle:hover {
    background: var(--input-bg);
    border-color: var(--primary-light);
    color: var(--primary);
}

/* Hero 区域 - 全屏居中，和功能页一致的比例 */
.landing-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 48px;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
}

.landing-hero-content {
    max-width: 1200px;
    margin: 0 auto;
}

.landing-hero h1 {
    font-size: 96px;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: 24px;
    line-height: 1.1;
}

.landing-hero .tagline {
    font-size: 48px;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 32px;
    letter-spacing: -0.02em;
}

.landing-hero .description {
    font-size: 24px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 48px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.landing-hero-buttons {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
}

.landing-hero-btn {
    padding: 20px 48px;
    font-size: 22px;
    font-weight: 500;
    border-radius: 980px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.landing-hero-btn.primary {
    background: var(--primary);
    color: white;
}

.landing-hero-btn.primary:hover {
    background: var(--primary-dark);
    transform: scale(1.02);
}

.landing-hero-btn.secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.landing-hero-btn.secondary:hover {
    background: rgba(0, 113, 227, 0.08);
}

/* 功能特性区 - 全屏居中，和适用场景一致的比例 */
.landing-features {
    min-height: 100vh;
    padding: 120px 48px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: var(--card-bg);
}

.landing-section-title {
    text-align: center;
    margin-bottom: 64px;
}

.landing-section-title h2 {
    font-size: 56px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.landing-section-title p {
    font-size: 22px;
    color: var(--text-secondary);
}

.landing-features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
    max-width: 1600px;
    margin: 0 auto;
    align-items: stretch;
}

.landing-feature-card {
    background: var(--bg-gradient-start);
    border-radius: 32px;
    padding: 64px 48px;
    text-align: center;
    border: 1px solid var(--border);
    box-shadow:
        0 2px 4px rgba(0,0,0,0.04),
        0 8px 16px rgba(0,0,0,0.04),
        0 16px 32px rgba(0,0,0,0.06);
    transform: translateY(0);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.landing-feature-card:hover {
    transform: translateY(-12px);
    box-shadow:
        0 8px 16px rgba(0,0,0,0.06),
        0 16px 32px rgba(0,0,0,0.08),
        0 32px 64px rgba(0,0,0,0.12);
}

.landing-feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 32px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.landing-feature-icon svg {
    width: 40px;
    height: 40px;
    stroke: white;
}

.landing-feature-card h3 {
    font-size: 34px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    line-height: 1.3;
}

.landing-feature-card p {
    font-size: 22px;
    color: var(--text-secondary);
    line-height: 1.8;
    text-align: center;
}

/* 使用场景区 - 全屏居中，放大2倍 */
.landing-use-cases {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 120px 48px;
    background: var(--bg-gradient-end);
}

.landing-use-cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
    max-width: 1600px;
    margin: 0 auto;
    align-items: stretch;
}

.landing-use-case {
    background: var(--card-bg);
    border-radius: 32px;
    padding: 64px 48px;
    text-align: center;
    border: 1px solid var(--border);
    box-shadow:
        0 1px 2px rgba(0,0,0,0.04),
        0 4px 8px rgba(0,0,0,0.04),
        0 12px 24px rgba(0,0,0,0.06);
    transform: translateY(0);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.landing-use-case:hover {
    transform: translateY(-8px);
    box-shadow:
        0 4px 8px rgba(0,0,0,0.06),
        0 12px 24px rgba(0,0,0,0.08),
        0 24px 48px rgba(0,0,0,0.12);
}

.landing-use-case-icon {
    font-size: 80px;
    margin-bottom: 32px;
}

.landing-use-case h3 {
    font-size: 34px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    line-height: 1.3;
}

.landing-use-case p {
    font-size: 22px;
    color: var(--text-secondary);
    line-height: 1.8;
    text-align: center;
}

/* 滚动动画 */
.scroll-animate {
    opacity: 0;
    transform: translateY(60px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 卡片依次进入动画 */
.scroll-animate-item {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scroll-animate-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Apple 风格滚动动画 - 适用场景专用 */
.apple-scroll-section {
    opacity: 0;
    transform: translateY(100px) scale(0.95);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1),
                transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.apple-scroll-section.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.apple-scroll-item {
    opacity: 0;
    transform: translateY(80px) scale(0.9);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.apple-scroll-item.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* 标题淡入缩放效果 */
.apple-title-animate {
    opacity: 0;
    transform: translateY(40px) scale(0.96);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.apple-title-animate.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* 定价区 - 全屏居中，和功能页一致 */
.landing-pricing {
    min-height: 100vh;
    padding: 120px 48px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: var(--card-bg);
}

.landing-pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    max-width: 1800px;
    margin: 0 auto;
    align-items: stretch;
}

.landing-pricing-card {
    background: var(--bg-gradient-start);
    border-radius: 32px;
    padding: 64px 48px;
    text-align: center;
    border: 1px solid var(--border);
    position: relative;
    box-shadow:
        0 2px 4px rgba(0,0,0,0.04),
        0 8px 16px rgba(0,0,0,0.04),
        0 16px 32px rgba(0,0,0,0.06);
    transform: translateY(0);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.landing-pricing-card:hover {
    transform: translateY(-12px);
    box-shadow:
        0 8px 16px rgba(0,0,0,0.06),
        0 16px 32px rgba(0,0,0,0.08),
        0 32px 64px rgba(0,0,0,0.12);
}

.landing-pricing-card.featured {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary),
        0 2px 4px rgba(0,0,0,0.04),
        0 8px 16px rgba(0,0,0,0.04),
        0 16px 32px rgba(0,0,0,0.06);
}

.landing-pricing-card.featured::before {
    content: attr(data-badge);
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: white;
    padding: 8px 24px;
    border-radius: 980px;
    font-size: 16px;
    font-weight: 500;
}

/* 落地页 Ultra 卡片样式 */
.landing-pricing-card.ultra {
    border-color: #7c3aed;
    box-shadow: 0 0 0 2px #7c3aed,
        0 2px 4px rgba(0,0,0,0.04),
        0 8px 16px rgba(0,0,0,0.04),
        0 16px 32px rgba(0,0,0,0.06);
}

.landing-pricing-card.ultra::before {
    content: attr(data-badge);
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(90deg, #7c3aed 0%, #a855f7 100%);
    color: white;
    padding: 8px 24px;
    border-radius: 980px;
    font-size: 16px;
    font-weight: 500;
}

.landing-pricing-btn.ultra {
    background: linear-gradient(90deg, #7c3aed 0%, #a855f7 100%);
    color: white;
}

.landing-pricing-btn.ultra:hover {
    background: linear-gradient(90deg, #6d28d9 0%, #9333ea 100%);
}

.landing-pricing-tier {
    font-size: 22px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.landing-pricing-price {
    margin-bottom: 32px;
}

.landing-pricing-price .amount {
    font-size: 72px;
    font-weight: 700;
    color: var(--text-primary);
}

.landing-pricing-price .currency {
    font-size: 28px;
    color: var(--text-secondary);
}

.landing-pricing-price .period {
    font-size: 16px;
    color: var(--text-muted);
}

.landing-pricing-features {
    text-align: left;
    margin-bottom: 40px;
    width: 100%;
}

.landing-pricing-feature {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 0;
    font-size: 20px;
    color: var(--text-secondary);
}

.landing-pricing-feature svg {
    width: 24px;
    height: 24px;
    stroke: var(--success);
    flex-shrink: 0;
}

.landing-pricing-btn {
    width: 100%;
    padding: 20px 32px;
    font-size: 20px;
    font-weight: 500;
    border-radius: 980px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    margin-top: auto;
}

.landing-pricing-btn.primary {
    background: var(--primary);
    color: white;
}

.landing-pricing-btn.primary:hover {
    background: var(--primary-dark);
}

.landing-pricing-btn.secondary {
    background: var(--input-bg);
    color: var(--text-primary);
}

.landing-pricing-btn.secondary:hover {
    background: var(--border);
}

/* 发展历程 */
.landing-timeline {
    padding: 100px 24px;
    max-width: 900px;
    margin: 0 auto;
}

.timeline-container {
    position: relative;
    padding-left: 40px;
}

.timeline-container::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary) 0%, var(--primary-light) 50%, var(--border) 100%);
}

.timeline-item {
    position: relative;
    padding-bottom: 40px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -40px;
    top: 4px;
    width: 18px;
    height: 18px;
    background: var(--card-bg);
    border: 3px solid var(--primary);
    border-radius: 50%;
    z-index: 1;
}

.timeline-item.timeline-future::before {
    border-color: var(--text-muted);
    border-style: dashed;
}

.timeline-date {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
    letter-spacing: 0.02em;
}

.timeline-item.timeline-future .timeline-date {
    color: var(--text-muted);
}

.timeline-content {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    box-shadow:
        0 1px 2px rgba(0,0,0,0.04),
        0 4px 8px rgba(0,0,0,0.04),
        0 12px 24px rgba(0,0,0,0.06);
    transform: translateX(0);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.timeline-content:hover {
    transform: translateX(8px);
    box-shadow:
        0 4px 8px rgba(0,0,0,0.06),
        0 12px 24px rgba(0,0,0,0.08),
        0 24px 48px rgba(0,0,0,0.12);
}

.timeline-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
}

.timeline-item.timeline-future .timeline-content {
    border-style: dashed;
    background: transparent;
}

/* 页脚 */
.landing-footer {
    padding: 24px;
    background: var(--bg-gradient-end);
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.landing-footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.landing-footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}

.landing-footer-logo .logo-icon {
    width: 28px;
    height: 28px;
}

.landing-footer-logo .logo-text {
    font-size: 16px;
    font-weight: 600;
}

.landing-footer-links {
    display: flex;
    gap: 32px;
}

.landing-footer-link {
    font-size: 13px;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}

.landing-footer-link:hover {
    color: var(--text-primary);
}

.landing-footer-copyright {
    font-size: 12px;
    color: var(--text-muted);
}

/* 着陆页响应式 */
@media (max-width: 1024px) {
    .landing-features-grid,
    .landing-use-cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .landing-pricing-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 700px;
    }
}

@media (max-width: 768px) {
    .landing-nav-links {
        position: static;
        transform: none;
        gap: 24px;
    }

    .landing-nav-link {
        font-size: 13px;
    }

    .landing-nav-buttons {
        gap: 8px;
    }

    .landing-nav-btn {
        padding: 6px 12px;
        font-size: 13px;
    }

    .landing-nav-btn.primary {
        display: none;
    }

    .landing-hero {
        padding: 70px 20px 50px;
    }

    .landing-hero h1 {
        font-size: 40px;
    }

    .landing-hero .tagline {
        font-size: 22px;
    }

    .landing-hero .description {
        font-size: 15px;
    }

    .landing-hero-buttons {
        flex-direction: column;
    }

    .landing-hero-btn {
        width: 100%;
        justify-content: center;
    }

    .landing-section-title h2 {
        font-size: 32px;
    }

    .landing-features,
    .landing-use-cases,
    .landing-pricing {
        padding: 48px 20px;
    }

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

    .landing-pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .landing-footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }

    .landing-footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .landing-nav-links {
        display: none;
    }

    .landing-nav-btn.primary {
        display: block;
        padding: 6px 10px;
        font-size: 12px;
    }

    .landing-nav-btn {
        padding: 6px 10px;
        font-size: 12px;
    }
}