/* ========================================
    Hero 区域
    ======================================== */
.hero-section {
    position: relative;
    padding: var(--spacing-4xl) 0;
    min-height: 85vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--bg-primary);
}

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

.hero-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.03) 0%, transparent 50%),
                linear-gradient(225deg, rgba(6, 182, 212, 0.03) 0%, transparent 50%);
}

.hero-section .container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-xl);
    animation: fadeInDown 0.6s ease-out;
}

.badge-icon {
    font-size: 1rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.15;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-xl);
    font-size: 1rem;
    font-weight: 700;
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

.btn-primary .btn-icon {
    transition: transform var(--transition-fast);
}

.btn-primary:hover .btn-icon {
    transform: translateX(4px);
}

.btn-secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    font-weight: 600;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: linear-gradient(180deg, transparent, var(--border-color), transparent);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 0.8s ease-out 0.3s both;
}

.zip-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
}

.zip-folder {
    position: relative;
    width: 180px;
    height: 180px;
    background: linear-gradient(145deg, #6366f1 0%, #8b5cf6 100%);
    border-radius: var(--radius-2xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.4);
    transition: all var(--transition-base);
}

.zip-folder:hover {
    transform: translateY(-8px) rotate(-2deg);
    box-shadow: 0 30px 60px rgba(99, 102, 241, 0.5);
}

.zip-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
}

.zip-name {
    font-family: var(--font-family-mono);
    font-size: 0.95rem;
    font-weight: 700;
    color: white;
}

.zip-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
    font-size: 0.75rem;
    font-weight: 800;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    box-shadow: 0 4px 10px rgba(245, 158, 11, 0.4);
}

.zip-files {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
    max-width: 280px;
}

.zip-file {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-family: var(--font-family-mono);
    font-size: 0.75rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    animation: bounceIn 0.5s ease-out both;
}

.zip-file:nth-child(1) { animation-delay: 0.5s; }
.zip-file:nth-child(2) { animation-delay: 0.6s; }
.zip-file:nth-child(3) { animation-delay: 0.7s; }
.zip-file:nth-child(4) { animation-delay: 0.8s; }

.zip-file:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(139, 92, 246, 0.08));
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.zip-file span:first-child {
    font-size: 1rem;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes bounceIn {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    60% {
        transform: scale(1.05);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

/* ========================================
    完整文件结构
    ======================================== */
.full-structure {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.structure-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-2xl);
}

.diagram-box {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-xl);
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.diagram-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

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

.diagram-box.root-box {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border: none;
    color: white;
    padding: var(--spacing-xl) var(--spacing-2xl);
    box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.4);
}

.diagram-box.root-box::before {
    display: none;
}

.diagram-box.root-box:hover {
    transform: translateY(-4px) scale(1.02);
}

.diagram-box.root-box .box-icon {
    font-size: 2.5rem;
}

.diagram-box.root-box .box-title {
    color: white;
    font-size: 1.25rem;
}

.diagram-box.root-box .box-desc {
    color: rgba(255, 255, 255, 0.85);
}

.box-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.box-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.box-title {
    font-family: var(--font-family-mono);
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
}

.box-desc {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.diagram-level {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xl);
    padding-left: var(--spacing-3xl);
    position: relative;
}

.diagram-level::before {
    content: '';
    position: absolute;
    left: 50%;
    top: -20px;
    width: 2px;
    height: 20px;
    background: linear-gradient(180deg, #6366f1, #8b5cf6);
}

.diagram-box.folder-box {
    background: linear-gradient(135deg, var(--bg-primary), var(--bg-tertiary));
    border-color: var(--primary-light);
}

.diagram-box.folder-box::before {
    background: linear-gradient(90deg, #6366f1, #8b5cf6);
}

.diagram-box.file-box {
    background: var(--bg-primary);
    border-color: var(--accent-color);
}

.diagram-box.file-box::before {
    background: var(--accent-color);
}

.sub-items {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px dashed var(--border-color);
}

.sub-box {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(139, 92, 246, 0.08));
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-md);
    font-family: var(--font-family-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.sub-box:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(139, 92, 246, 0.15));
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.sub-icon {
    font-size: 0.875rem;
}

.sub-name {
    font-weight: 600;
}

@media (max-width: 1024px) {
    .diagram-level {
        padding-left: 0;
    }
    
    .diagram-level::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .structure-diagram {
        padding: var(--spacing-lg);
    }
    
    .diagram-box {
        width: 100%;
    }
    
    .diagram-level {
        flex-direction: column;
        align-items: stretch;
    }
    
    .sub-items {
        justify-content: flex-start;
    }
}

/* ========================================
    Hero 响应式
    ======================================== */
@media (max-width: 1024px) {
    .hero-section .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
}

@media (max-width: 768px) {
    .hero-section {
        padding: var(--spacing-2xl) 0;
        min-height: auto;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-desc {
        font-size: 1rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: var(--spacing-lg);
    }
    
    .stat-divider {
        display: none;
    }
}

/* ========================================
    Section 通用样式
    ======================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary-dark);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: 2.25rem;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-tertiary);
    max-width: 600px;
    margin: var(--spacing-lg) auto 0;
    line-height: 1.7;
}

/* ========================================
    什么是DOCX - 增强卡片
    ======================================== */
.what-is-docx {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    position: relative;
}

.what-is-docx::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.intro-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-xl);
}

.intro-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.intro-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.intro-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top right, rgba(99, 102, 241, 0.05), transparent 60%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.intro-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.intro-card:hover::before {
    transform: scaleX(1);
}

.intro-card:hover::after {
    opacity: 1;
}

.intro-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    display: inline-block;
    transition: transform var(--transition-base);
}

.intro-card:hover .intro-icon {
    transform: scale(1.15) rotate(5deg);
}

.intro-card h3 {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    position: relative;
}

.intro-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
    position: relative;
}

/* ========================================
    核心结构树 - 增强样式
    ======================================== */
.core-structure {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-primary);
    position: relative;
}

.structure-tree {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    overflow-x: auto;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.04);
}

.tree-root {
    min-width: 550px;
}

.tree-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    position: relative;
}

.tree-item:hover {
    background: rgba(99, 102, 241, 0.06);
}

.tree-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: height var(--transition-fast);
}

.tree-item:hover::before {
    height: 60%;
}

.tree-item.root {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.tree-item.root::before {
    display: none;
}

.tree-item.root .tree-desc {
    color: rgba(255, 255, 255, 0.85);
}

.tree-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.tree-name {
    font-family: var(--font-family-mono);
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.tree-desc {
    color: var(--text-tertiary);
    font-size: 0.8rem;
    margin-left: auto;
}

.tree-level-1 {
    padding-left: var(--spacing-lg);
    border-left: 2px dashed var(--border-color);
    margin-left: var(--spacing-md);
}

.tree-level-2 {
    padding-left: var(--spacing-2xl);
    border-left: 2px dashed var(--border-color);
    margin-left: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.tree-item.folder > .tree-icon {
    color: #f59e0b;
}

.tree-item.file > .tree-icon {
    color: #6366f1;
}

/* ========================================
    主要组件 - 增强卡片
    ======================================== */
.main-components {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.components-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: var(--spacing-xl);
}

.component-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.component-header {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.component-icon {
    font-size: 1.5rem;
}

.component-title {
    font-family: var(--font-family-mono);
    font-size: 0.95rem;
    font-weight: 700;
    color: white;
    margin: 0;
}

.component-content {
    padding: var(--spacing-xl);
}

.component-desc {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
    font-size: 0.95rem;
}

.component-example {
    background: #1e293b;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    overflow-x: auto;
}

.example-label {
    display: block;
    font-weight: 700;
    color: #94a3b8;
    margin-bottom: var(--spacing-sm);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.code-block {
    display: block;
    font-family: var(--font-family-mono);
    font-size: 0.75rem;
    color: #e2e8f0;
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
    background: #1e293b;
    padding: 12px 16px;
    border-radius: 8px;
    margin-top: 12px;
}

/* ========================================
    XML示例 - 增强面板
    ======================================== */
.xml-example {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-secondary);
}

.xml-demo {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-xl);
}

.xml-panel {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.xml-panel:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.panel-header {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-title {
    font-family: var(--font-family-mono);
    font-weight: 600;
    font-size: 0.85rem;
}

.panel-badge {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.panel-content {
    padding: 0;
    overflow-x: auto;
}

.xml-code {
    margin: 0;
    padding: var(--spacing-lg);
    font-family: var(--font-family-mono);
    font-size: 0.75rem;
    line-height: 1.8;
    color: #e2e8f0;
    background: #0f172a;
    white-space: pre;
}

/* ========================================
    为什么理解 - 增强卡片
    ======================================== */
.why-understand {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.reasons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.reason-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.reason-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
}

.reason-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08), transparent 70%);
}

.reason-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-6px);
}

.reason-number {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    font-size: 3.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    opacity: 0.15;
}

.reason-title {
    font-size: 1.15rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    position: relative;
    z-index: 1;
}

.reason-desc {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
    position: relative;
    z-index: 1;
}

/* ========================================
    工具资源 - 增强卡片
    ======================================== */
.tools-resources {
    padding: var(--spacing-4xl) 0;
    background: var(--bg-primary);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.tool-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top, rgba(99, 102, 241, 0.05), transparent 60%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

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

.tool-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    display: inline-block;
    transition: transform var(--transition-base);
}

.tool-card:hover .tool-icon {
    transform: scale(1.1);
}

.tool-title {
    font-size: 1.1rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    position: relative;
}

.tool-desc {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9rem;
    position: relative;
}

/* ========================================
    响应式样式
    ======================================== */
@media (max-width: 1024px) {
    .components-grid {
        grid-template-columns: 1fr;
    }
    
    .xml-demo {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .intro-grid {
        grid-template-columns: 1fr;
    }
    
    .structure-tree {
        padding: var(--spacing-lg);
    }
    
    .tree-root {
        min-width: 100%;
    }
    
    .tree-level-1,
    .tree-level-2 {
        padding-left: var(--spacing-md);
        margin-left: var(--spacing-sm);
    }
    
    .reasons-grid {
        grid-template-columns: 1fr;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .tree-item {
        flex-wrap: wrap;
    }
    
    .tree-desc {
        width: 100%;
        padding-left: 2rem;
    }
}