/* ==========================================================================
   首页样式 - AutoDoor 行为树工具官方网站
   ========================================================================== */

/* --- 通用容器与段落 --- */
.bt-home-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--bt-space-lg);
}

.bt-home-section {
    padding: var(--bt-space-3xl) 0;
}

.bt-home-section-header {
    text-align: center;
    margin-bottom: var(--bt-space-2xl);
}

.bt-home-section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-bottom: var(--bt-space-sm);
    letter-spacing: -0.02em;
}

.bt-home-section-desc {
    font-size: 1.0625rem;
    color: var(--bt-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

/* --- 通用按钮 --- */
.bt-home-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--bt-space-sm);
    padding: 12px 28px;
    border-radius: var(--bt-radius-lg);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--bt-transition);
    line-height: 1.4;
}

.bt-home-btn--primary {
    background: #fff;
    color: #1a1a2e;
    border-color: #fff;
}

.bt-home-btn--primary:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.bt-home-btn--outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.4);
}

.bt-home-btn--outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.7);
    transform: translateY(-2px);
}

.bt-home-btn--download {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 14px 24px;
    background: var(--bt-primary);
    color: #fff;
    border: none;
    border-radius: var(--bt-radius-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--bt-transition);
}

.bt-home-btn--download:hover:not(:disabled) {
    background: var(--bt-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--bt-shadow-md);
}

.bt-home-btn--download.bt-home-btn--disabled {
    background: var(--bt-bg-tertiary);
    color: var(--bt-text-muted);
    cursor: not-allowed;
}

.bt-home-btn--lg {
    padding: 16px 36px;
    font-size: 1.125rem;
}

/* ==========================================================================
   1. Hero 区域
   ========================================================================== */
.bt-home-hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #0d1b3e 0%, #1a237e 30%, #283593 50%, #4527a0 75%, #6a1b9a 100%);
    padding: var(--bt-space-3xl) var(--bt-space-lg);
}

/* 动画点阵背景 */
.bt-home-hero-bg {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
    background-size: 32px 32px;
    animation: bt-home-grid-drift 20s linear infinite;
}

@keyframes bt-home-grid-drift {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 32px 32px;
    }
}

.bt-home-hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 720px;
}

.bt-home-hero-badges {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--bt-space-sm);
    margin-bottom: var(--bt-space-xl);
}

.bt-home-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.12);
    color: rgba(255, 255, 255, 0.9);
    border-radius: var(--bt-radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(4px);
}

.bt-home-badge--platform {
    background: rgba(0, 188, 212, 0.2);
    border-color: rgba(0, 188, 212, 0.3);
}

.bt-home-badge--feature {
    background: rgba(0, 188, 212, 0.2);
    border-color: rgba(0, 188, 212, 0.3);
}

.bt-home-hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: var(--bt-space-md);
    letter-spacing: -0.03em;
    line-height: 1.15;
}

.bt-home-hero-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: var(--bt-space-2xl);
    line-height: 1.6;
}

.bt-home-hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--bt-space-md);
    margin-bottom: var(--bt-space-2xl);
    flex-wrap: wrap;
}

.bt-home-hero-tech {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--bt-space-sm);
    flex-wrap: wrap;
}

.bt-home-hero-tech span {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.5);
    font-weight: 500;
}

.bt-home-hero-tech-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
    display: inline-block;
}

/* ==========================================================================
   2. 核心特性
   ========================================================================== */
.bt-home-features {
    background: var(--bt-bg-body);
}

.bt-home-features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--bt-space-lg);
}

.bt-home-feature-card {
    background: var(--bt-bg-card);
    border-radius: var(--bt-radius-xl);
    padding: var(--bt-space-xl);
    text-align: center;
    box-shadow: var(--bt-shadow-sm);
    border: 1px solid var(--bt-border);
    transition: var(--bt-transition);
}

.bt-home-feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--bt-shadow-lg);
    border-color: var(--bt-primary-light);
}

.bt-home-feature-icon {
    font-size: 48px;
    line-height: 1;
    margin-bottom: var(--bt-space-md);
}

.bt-home-feature-title {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-bottom: var(--bt-space-sm);
}

.bt-home-feature-desc {
    font-size: 0.875rem;
    color: var(--bt-text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* ==========================================================================
   3. 技术架构
   ========================================================================== */
.bt-home-arch {
    background: var(--bt-bg-card);
}

.bt-home-arch-diagram {
    max-width: 680px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.bt-home-arch-layer {
    width: 100%;
    border-radius: var(--bt-radius-lg);
    padding: var(--bt-space-lg) var(--bt-space-xl);
    text-align: center;
    position: relative;
}

.bt-home-arch-layer--gui {
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    border: 2px solid #90caf9;
}

.bt-home-arch-layer--app {
    background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
    border: 2px solid #a5d6a7;
}

.bt-home-arch-layer--domain {
    background: linear-gradient(135deg, #fff3e0, #ffe0b2);
    border: 2px solid #ffcc80;
}

.bt-home-arch-layer--infra {
    background: linear-gradient(135deg, #f3e5f5, #e1bee7);
    border: 2px solid #ce93d8;
}

.bt-home-arch-layer-label {
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--bt-space-sm);
    opacity: 0.7;
}

.bt-home-arch-layer--gui .bt-home-arch-layer-label { color: #1565c0; }
.bt-home-arch-layer--app .bt-home-arch-layer-label { color: #2e7d32; }
.bt-home-arch-layer--domain .bt-home-arch-layer-label { color: #e65100; }
.bt-home-arch-layer--infra .bt-home-arch-layer-label { color: #7b1fa2; }

.bt-home-arch-layer-items {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--bt-space-sm);
    flex-wrap: wrap;
}

.bt-home-arch-item {
    display: inline-flex;
    align-items: center;
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.7);
    border-radius: var(--bt-radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--bt-text-primary);
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.bt-home-arch-connector {
    width: 2px;
    height: 24px;
    background: linear-gradient(to bottom, var(--bt-border), var(--bt-text-muted), var(--bt-border));
    position: relative;
}

.bt-home-arch-connector::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 6px solid var(--bt-text-muted);
}

/* ==========================================================================
   4. 节点类型
   ========================================================================== */
.bt-home-nodes {
    background: var(--bt-bg-body);
}

.bt-home-nodes-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--bt-space-lg);
}

.bt-home-node-category {
    background: var(--bt-bg-card);
    border-radius: var(--bt-radius-xl);
    overflow: hidden;
    box-shadow: var(--bt-shadow-sm);
    border: 1px solid var(--bt-border);
    transition: var(--bt-transition);
}

.bt-home-node-category:hover {
    box-shadow: var(--bt-shadow-md);
    transform: translateY(-4px);
}

.bt-home-node-category-header {
    display: flex;
    align-items: center;
    gap: var(--bt-space-sm);
    padding: var(--bt-space-lg) var(--bt-space-xl);
    color: #fff;
}

.bt-home-node-category--composite {
    background: linear-gradient(135deg, #1565c0, #1976d2);
}

.bt-home-node-category--condition {
    background: linear-gradient(135deg, #2e7d32, #43a047);
}

.bt-home-node-category--action {
    background: linear-gradient(135deg, #e65100, #f57c00);
}

.bt-home-node-category-icon {
    font-size: 1.25rem;
}

.bt-home-node-category-header h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    margin: 0;
    flex: 1;
}

.bt-home-node-category-count {
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.2);
    padding: 2px 10px;
    border-radius: var(--bt-radius-full);
}

.bt-home-node-list {
    list-style: none;
    margin: 0;
    padding: var(--bt-space-md) var(--bt-space-xl) var(--bt-space-lg);
}

.bt-home-node-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--bt-space-sm);
    padding: var(--bt-space-sm) 0;
    font-size: 0.875rem;
    color: var(--bt-text-secondary);
    line-height: 1.5;
    border-bottom: 1px solid var(--bt-bg-secondary);
}

.bt-home-node-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.bt-home-node-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 6px;
}

.bt-home-node-dot--composite { background: #1976d2; }
.bt-home-node-dot--condition { background: #43a047; }
.bt-home-node-dot--action { background: #f57c00; }

/* ==========================================================================
   5. 下载
   ========================================================================== */
.bt-home-download {
    background: var(--bt-bg-card);
}

.bt-home-download-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--bt-space-xl);
    max-width: 800px;
    margin: 0 auto;
}

.bt-home-download-card {
    position: relative;
    background: var(--bt-bg-body);
    border: 2px solid var(--bt-border);
    border-radius: var(--bt-radius-xl);
    padding: var(--bt-space-2xl);
    text-align: center;
    transition: var(--bt-transition);
}

.bt-home-download-card:hover {
    border-color: var(--bt-primary-light);
    box-shadow: var(--bt-shadow-md);
}

.bt-home-download-card--featured {
}

.bt-home-download-card--featured:hover {
    border-color: var(--bt-primary-dark);
}

.bt-home-download-card-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bt-primary);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 16px;
    border-radius: var(--bt-radius-full);
}

.bt-home-download-card-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--bt-space-sm);
    margin-bottom: var(--bt-space-lg);
}

.bt-home-download-card-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--bt-text-primary);
    margin: 0;
}

.bt-home-download-version {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--bt-text-muted);
    background: var(--bt-bg-tertiary);
    padding: 2px 10px;
    border-radius: var(--bt-radius-full);
}

.bt-home-download-features {
    list-style: none;
    margin: 0 0 var(--bt-space-xl);
    padding: 0;
    text-align: left;
}

.bt-home-download-features li {
    display: flex;
    align-items: center;
    gap: var(--bt-space-sm);
    padding: var(--bt-space-sm) 0;
    font-size: 0.9375rem;
    color: var(--bt-text-secondary);
}

.bt-home-download-features li svg {
    color: var(--bt-success);
    flex-shrink: 0;
}

.bt-home-download-note {
    text-align: center;
    color: var(--bt-text-muted);
    font-size: 0.9375rem;
    margin-top: var(--bt-space-xl);
}

/* 从源码构建 */
.bt-home-build {
    margin-top: var(--bt-space-2xl);
    text-align: center;
}

.bt-home-build-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-bottom: var(--bt-space-md);
}

.bt-home-build-code {
    background: #1a1a2e;
    border-radius: var(--bt-radius-lg);
    padding: var(--bt-space-lg) var(--bt-space-xl);
    text-align: left;
    overflow-x: auto;
}

.bt-home-build-code code {
    font-family: var(--bt-font-mono);
    font-size: 0.875rem;
    color: #a5d6a7;
    line-height: 1.8;
    white-space: pre;
}

/* ==========================================================================
   6. 社区
   ========================================================================== */
.bt-home-community {
    background: var(--bt-bg-body);
}

.bt-home-community-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--bt-space-lg);
}

.bt-home-community-card {
    background: var(--bt-bg-card);
    border-radius: var(--bt-radius-xl);
    padding: var(--bt-space-2xl);
    text-align: center;
    box-shadow: var(--bt-shadow-sm);
    border: 1px solid var(--bt-border);
    transition: var(--bt-transition);
    text-decoration: none;
    color: inherit;
    display: block;
}

.bt-home-community-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--bt-shadow-md);
    border-color: var(--bt-primary-light);
}

.bt-home-community-card--link {
    cursor: pointer;
}

.bt-home-community-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--bt-primary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--bt-space-lg);
    color: var(--bt-primary);
}

.bt-home-community-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--bt-text-primary);
    margin-bottom: var(--bt-space-sm);
}

.bt-home-community-info {
    font-size: 1rem;
    font-weight: 600;
    color: var(--bt-text-secondary);
    margin-bottom: var(--bt-space-xs);
}

.bt-home-community-sub {
    font-size: 0.875rem;
    color: var(--bt-text-muted);
    margin: 0;
}

/* ==========================================================================
   7. CTA 区域
   ========================================================================== */
.bt-home-cta {
    background: linear-gradient(135deg, #0d1b3e 0%, #1a237e 30%, #283593 50%, #4527a0 75%, #6a1b9a 100%);
    padding: var(--bt-space-3xl) var(--bt-space-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.bt-home-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 24px 24px;
}

.bt-home-cta .bt-home-container {
    position: relative;
    z-index: 1;
}

.bt-home-cta-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: var(--bt-space-sm);
    letter-spacing: -0.02em;
}

.bt-home-cta-subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--bt-space-2xl);
}

/* ==========================================================================
   响应式设计
   ========================================================================== */

/* 平板 (<=1024px) */
@media (max-width: 1024px) {
    .bt-home-features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .bt-home-hero-title {
        font-size: 2.75rem;
    }
}

/* 小平板 (<=768px) */
@media (max-width: 768px) {
    .bt-home-section {
        padding: var(--bt-space-2xl) 0;
    }

    .bt-home-hero {
        min-height: 480px;
        padding: var(--bt-space-2xl) var(--bt-space-lg);
    }

    .bt-home-hero-title {
        font-size: 2.25rem;
    }

    .bt-home-hero-subtitle {
        font-size: 1.0625rem;
    }

    .bt-home-section-title {
        font-size: 1.625rem;
    }

    .bt-home-features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--bt-space-md);
    }

    .bt-home-nodes-grid {
        grid-template-columns: 1fr;
        gap: var(--bt-space-md);
    }

    .bt-home-download-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .bt-home-community-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }

    .bt-home-cta-title {
        font-size: 1.75rem;
    }

    .bt-home-arch-layer {
        padding: var(--bt-space-md) var(--bt-space-lg);
    }

    .bt-home-arch-item {
        font-size: 0.8125rem;
        padding: 4px 12px;
    }
}

/* 手机 (<=480px) */
@media (max-width: 480px) {
    .bt-home-hero {
        min-height: 420px;
        padding: var(--bt-space-xl) var(--bt-space-md);
    }

    .bt-home-hero-title {
        font-size: 1.75rem;
    }

    .bt-home-hero-subtitle {
        font-size: 0.9375rem;
    }

    .bt-home-hero-actions {
        flex-direction: column;
        gap: var(--bt-space-sm);
    }

    .bt-home-hero-actions .bt-home-btn {
        width: 100%;
        justify-content: center;
    }

    .bt-home-hero-tech {
        flex-direction: column;
        gap: var(--bt-space-xs);
    }

    .bt-home-hero-tech-dot {
        display: none;
    }

    .bt-home-features-grid {
        grid-template-columns: 1fr;
    }

    .bt-home-feature-card {
        padding: var(--bt-space-lg);
    }

    .bt-home-section-title {
        font-size: 1.375rem;
    }

    .bt-home-section-desc {
        font-size: 0.9375rem;
    }

    .bt-home-arch-layer-items {
        flex-direction: column;
        gap: var(--bt-space-xs);
    }

    .bt-home-download-card {
        padding: var(--bt-space-xl);
    }

    .bt-home-build-code {
        padding: var(--bt-space-md);
    }

    .bt-home-build-code code {
        font-size: 0.75rem;
    }

    .bt-home-cta {
        padding: var(--bt-space-2xl) var(--bt-space-md);
    }

    .bt-home-cta-title {
        font-size: 1.5rem;
    }

    .bt-home-btn--lg {
        padding: 14px 28px;
        font-size: 1rem;
    }
}