/* ===== 基础样式重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== CSS变量定义 ===== */
:root {
    /* 主色调 */
    --primary-color: #3388FF;
    --primary-light: #5BA0FF;
    --primary-dark: #1E6FE6;
    
    /* 辅助色 */
    --white: #FFFFFF;
    --light-blue: #F0F7FF;
    --very-light-blue: #F8FBFF;
    
    /* 中性色 */
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    /* 字体 */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* 间距 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(51, 136, 255, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(51, 136, 255, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(51, 136, 255, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(51, 136, 255, 0.1);
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* 核心评测能力布局参数（可按需覆盖） */
    --cap-text-color: var(--gray-900); /* 可设置为 ${text_color} */
    --cap-first-width: min(50%, 600px); /* 可设置为 ${width_value} */
    --cap-spacing: var(--spacing-lg); /* 可设置为 ${spacing_value} */
    --cap-padding: var(--spacing-xl); /* 可设置为 ${padding_value} */
    --cap-breakpoint: 768px; /* 可设置为 ${breakpoint} */
    /* 新增：列宽与卡片宽度约束 */
    --cap-min-col: 240px; /* 每列最小宽度，保证等宽列在窄屏时不拥挤 */
    --cap-card-min: 220px; /* 卡片最小宽度，避免内容溢出 */
    /* 新增：卡片背景与描边变量（便于统一维护） */
    --cap-card-bg: #FFFFFF; /* 统一卡片背景为纯白 */
    --cap-card-border: none; /* 统一移除卡片边框 */
}

/* ===== 基础样式 ===== */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-100);
    z-index: 1000;
    transition: var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.brand-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--gray-600);
    transition: var(--transition-fast);
    border-radius: 2px;
}

/* ===== 主页横幅 ===== */
.hero {
    position: relative;
    min-height: 75vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    opacity: 0.1;
}

.hero-shape {
    position: absolute;
    border-radius: 50%;
    background: var(--white);
}

.hero-shape-1 {
    width: 300px;
    height: 300px;
    top: 10%;
    left: 10%;
    animation: float 6s ease-in-out infinite;
}

.hero-shape-2 {
    width: 200px;
    height: 200px;
    top: 60%;
    right: 15%;
    animation: float 8s ease-in-out infinite reverse;
}

.hero-shape-3 {
    width: 150px;
    height: 150px;
    bottom: 20%;
    left: 60%;
    animation: float 7s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    margin-top: 40px;
    margin-bottom: var(--spacing-lg);
}

.hero-subtitle {
    display: block;
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: 400;
    opacity: 0.9;
    margin-top: var(--spacing-sm);
}

.hero-description {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    opacity: 0.9;
    margin-bottom: var(--spacing-2xl);
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
    padding-bottom: 50px;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: 0;
    flex-wrap: wrap;
}

.hero-feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-normal);
}

.hero-feature:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.hero-feature i {
    font-size: 2rem;
}

.hero-feature span {
    font-weight: 500;
}



/* ===== 按钮样式 ===== */
.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    min-width: 140px;
}

.btn-primary {
    background: var(--white);
    color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: var(--gray-50);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-color);
}

.btn-full {
    width: 100%;
}

/* ===== 章节样式 ===== */
section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--gray-600);
    width: 100%;
    /* max-width: 600px; */
    margin: 0 auto;
}

/* ===== 核心能力区域 ===== */
.capabilities {
    background: var(--light-blue);
}

/* 新版布局：基于7.png参考模板的现代网格布局 */
.capabilities-new-grid {
    display: flex;
    flex-direction: column;
    gap: var(--cap-spacing);
    max-width: 1200px;
    margin: 0 auto;
}

/* 网格行布局（两行） */
.grid-row {
    display: grid;
    gap: var(--cap-spacing);
    align-items: stretch;
}

.row-primary {
    grid-template-columns: repeat(4, 1fr);
}

.row-secondary {
    grid-template-columns: repeat(4, 1fr);
}

.row-secondary.equal-all {
    grid-template-columns: repeat(4, 1fr);
}

/* 精确列定位：大卡跨两列，其余六卡严格等宽占一列 */
.row-primary .large-card { grid-column: 1 / span 2; }
.row-primary .capability-card:nth-child(2) { grid-column: 3; }
.row-primary .capability-card:nth-child(3) { grid-column: 4; }
.row-secondary .capability-card:nth-child(1) { grid-column: 1; }
.row-secondary .capability-card:nth-child(2) { grid-column: 2; }
.row-secondary .capability-card:nth-child(3) { grid-column: 3; }
.row-secondary .capability-card:nth-child(4) { grid-column: 4; }

/* 卡片基础样式 */
.capability-card {
    background: var(--cap-card-bg);
    border-radius: var(--radius-xl);
    padding: var(--cap-padding);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: var(--cap-card-border);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-sizing: border-box;
    min-width: var(--cap-card-min);
    max-width: 100%;
    color: var(--cap-text-color);
}

.capability-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), #4f46e5);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

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

.capability-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

/* 统一card-example图标颜色与层级 */
.capabilities-new-grid .card-example i {
    color: var(--primary-color);
}

/* 卡片尺寸变体 */
.large-card {
    flex: 2;
    min-height: 320px;
}

.medium-card {
    flex: 1;
    min-height: 240px;
}

.small-card {
    flex: 1;
    min-height: 200px;
}

/* 文本换行优化，避免窄屏截断或异常换行 */
.capability-card .card-title,
.capability-card .card-description,
.capability-card .card-example {
    overflow-wrap: break-word;
    word-break: break-word;
    hyphens: auto;
}

/* 卡片类型样式 */
.primary-card {
    background: var(--cap-card-bg);
    color: inherit; /* 避免文字受背景变更影响 */
}

.primary-card::before {
    background: linear-gradient(90deg, var(--primary-color), #4f46e5);
}

.secondary-card {
    background: var(--cap-card-bg);
    border: var(--cap-card-border);
}

.tertiary-card {
    background: var(--cap-card-bg);
    border: var(--cap-card-border);
}

/* 卡片视觉区域 */
.card-visual {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-lg);
}

/* 图标样式 */
.card-icon-large {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--white);
    backdrop-filter: blur(10px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.card-icon-medium {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), #4f46e5);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--white);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.card-icon-small {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), #4f46e5);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--white);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.25);
}

/* 徽章样式 */
.card-badge {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* 卡片内容 */
.card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* 标题样式 */
.primary-card .card-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--cap-text-color);
    line-height: 1.2;
}

.secondary-card .card-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--cap-text-color);
    line-height: 1.3;
}

.tertiary-card .card-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--cap-text-color);
    line-height: 1.3;
}

/* 描述样式 */
.primary-card .card-description {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    color: var(--cap-text-color);
}

.secondary-card .card-description {
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
    color: var(--cap-text-color);
}

.tertiary-card .card-description {
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
    color: var(--cap-text-color);
}

/* 指标样式 */
.card-metrics {
    display: flex;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

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

.metric-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--cap-text-color);
    margin-bottom: 4px;
    line-height: 1;
}

.metric-label {
    font-size: 12px;
    color: var(--cap-text-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

/* 示例样式 */
.primary-card .card-example {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--very-light-blue) 0%, rgba(51,136,255,0.06) 100%);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--cap-text-color);
    backdrop-filter: none;
    border: 1px solid var(--gray-200);
    margin-top: auto;
    transition: background-color var(--transition-normal), border-color var(--transition-normal), color var(--transition-normal), box-shadow var(--transition-normal);
}

.secondary-card .card-example {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--very-light-blue) 0%, rgba(51,136,255,0.06) 100%);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--cap-text-color);
    margin-top: auto;
    border: 1px solid var(--gray-200);
    transition: background-color var(--transition-normal), border-color var(--transition-normal), color var(--transition-normal), box-shadow var(--transition-normal);
}

.tertiary-card .card-example {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: linear-gradient(135deg, var(--very-light-blue) 0%, rgba(51,136,255,0.06) 100%);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--cap-text-color);
    margin-top: auto;
    border: 1px solid var(--gray-200);
    transition: background-color var(--transition-normal), border-color var(--transition-normal), color var(--transition-normal), box-shadow var(--transition-normal);
}

/* 统一示例区层级与位置 */
.capabilities-new-grid .card-example { margin-top: auto; position: relative; z-index: 1; }

/* 响应式设计 */
@media (max-width: 1024px) {
    .capabilities-new-grid {
        max-width: 100%;
        padding: 0 var(--spacing-md);
    }
    :root { --cap-min-col: 200px; }
    
    .row-tertiary {
        gap: var(--spacing-xl);
    }
    
    .large-card {
        min-height: 280px;
    }
    
    .medium-card {
        min-height: 220px;
    }
    
    .small-card {
        min-height: 180px;
    }
}

@media (max-width: 768px) {
    .grid-row {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .row-primary,
    .row-secondary,
    .row-tertiary {
        justify-content: stretch;
        gap: var(--spacing-md);
    }
    
    .large-card,
    .medium-card,
    .small-card {
        flex: none;
        min-height: auto;
    }
    
    .capability-card {
        padding: var(--spacing-lg);
    }
    /* 两列下列定位：保持第一行大卡与第二行第二卡右缘对齐 */
    .row-primary .large-card { grid-column: 1 / span 2; }
    .row-primary .capability-card:nth-child(2) { grid-column: 1; }
    .row-primary .capability-card:nth-child(3) { grid-column: 2; }
    .row-secondary .capability-card:nth-child(1) { grid-column: 1; }
    .row-secondary .capability-card:nth-child(2) { grid-column: 2; }
    .row-secondary .capability-card:nth-child(3) { grid-column: 1; }
    .row-secondary .capability-card:nth-child(4) { grid-column: 2; }
    
    .card-icon-large {
        width: 64px;
        height: 64px;
        font-size: 28px;
    }
    
    .card-icon-medium {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
    
    .card-icon-small {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
    
    .primary-card .card-title {
        font-size: 24px;
    }
    
    .secondary-card .card-title,
    .tertiary-card .card-title {
        font-size: 18px;
    }
    
    .card-metrics {
        gap: var(--spacing-lg);
    }
    
    .metric-value {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    .grid-row { grid-template-columns: 1fr; }
    /* 单列下的列定位（自然对齐） */
    .row-primary .large-card { grid-column: 1; }
    .row-primary .capability-card:nth-child(2) { grid-column: 1; }
    .row-primary .capability-card:nth-child(3) { grid-column: 1; }
    .row-secondary .capability-card:nth-child(1) { grid-column: 1; }
    .row-secondary .capability-card:nth-child(2) { grid-column: 1; }
    .row-secondary .capability-card:nth-child(3) { grid-column: 1; }
    .row-secondary .capability-card:nth-child(4) { grid-column: 1; }
    .capabilities-new-grid {
        gap: var(--spacing-lg);
    }
    
    .capability-card {
        padding: var(--spacing-md);
    }
    
    .card-visual {
        margin-bottom: var(--spacing-md);
    }
    
    .card-icon-large {
        width: 56px;
        height: 56px;
        font-size: 24px;
    }
    
    .card-icon-medium {
        width: 44px;
        height: 44px;
        font-size: 18px;
    }
    
    .card-icon-small {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
    
    .primary-card .card-title {
        font-size: 20px;
    }
    
    .secondary-card .card-title,
    .tertiary-card .card-title {
        font-size: 16px;
    }
    
    .primary-card .card-description,
    .secondary-card .card-description,
    .tertiary-card .card-description {
        font-size: 13px;
    }
    
    .card-metrics {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: center;
    }
    
    .metric-item {
        display: flex;
        align-items: center;
        gap: var(--spacing-sm);
    }
    
    .metric-value {
        font-size: 18px;
        margin-bottom: 0;
    }
    
    .card-badge {
        padding: 4px 12px;
        font-size: 11px;
    }
}

/* 方案二：时间轴式垂直布局 */
.capabilities-timeline {
    max-width: 1000px;
    margin: 0 auto;
}

.timeline-container {
    position: relative;
    padding: var(--spacing-xl) 0;
}

.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(to bottom, var(--primary-color), #4f46e5);
    transform: translateX(-50%);
    border-radius: var(--radius-full);
}

.timeline-item {
    position: relative;
    margin-bottom: calc(var(--spacing-xl) * 2);
    display: flex;
    align-items: center;
}

.timeline-item.left {
    justify-content: flex-end;
}

.timeline-item.right {
    justify-content: flex-start;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.marker-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), #4f46e5);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 24px;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
    border: 4px solid var(--white);
}

.marker-number {
    background: var(--white);
    color: var(--primary-color);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--primary-color);
}

.timeline-content {
    width: calc(50% - 60px);
    margin: 0 var(--spacing-xl);
}

.timeline-item.left .timeline-content {
    text-align: right;
}

.timeline-item.right .timeline-content {
    text-align: left;
}

.timeline-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-100);
    position: relative;
    transition: all 0.3s ease;
}

.timeline-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.timeline-card.primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #4f46e5 100%);
    color: var(--white);
}

.timeline-card::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 0;
    height: 0;
    border: 12px solid transparent;
}

.timeline-item.left .timeline-card::before {
    right: -24px;
    border-left-color: var(--white);
    transform: translateY(-50%);
}

.timeline-item.right .timeline-card::before {
    left: -24px;
    border-right-color: var(--white);
    transform: translateY(-50%);
}

.timeline-card.primary::before {
    border-left-color: var(--primary-color) !important;
    border-right-color: var(--primary-color) !important;
}

.timeline-card .card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.timeline-card .card-title {
    font-size: 20px;
    font-weight: 700;
    margin: 0;
    color: var(--gray-900);
}

.timeline-card.primary .card-title {
    color: var(--white);
}

.card-status {
    background: var(--gray-100);
    color: var(--gray-600);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.timeline-card.primary .card-status {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
}

.timeline-card .card-description {
    font-size: 15px;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    color: var(--gray-600);
}

.timeline-card.primary .card-description {
    color: rgba(255, 255, 255, 0.9);
}

.card-features {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
}

.timeline-card .card-example {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--gray-600);
}

.timeline-card.primary .card-example {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
}

/* 方案三：六边形蜂窝布局 */
.capabilities-hexagon {
    padding: calc(var(--spacing-xl) * 2) 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.hexagon-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    padding: var(--spacing-xl);
}

.hexagon-grid {
    position: relative;
    width: 800px;
    height: 600px;
    margin: 0 auto;
}

.hexagon-item {
    position: absolute;
    width: 160px;
    height: 140px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.hexagon-item:hover {
    transform: scale(1.1);
    z-index: 10;
}

/* 六边形位置定位 */
.hexagon-item[data-position="center"] {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 180px;
    height: 160px;
}

.hexagon-item[data-position="top"] {
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
}

.hexagon-item[data-position="top-right"] {
    top: 25%;
    right: 15%;
}

.hexagon-item[data-position="bottom-right"] {
    bottom: 25%;
    right: 15%;
}

.hexagon-item[data-position="bottom"] {
    bottom: 10%;
    left: 50%;
    transform: translateX(-50%);
}

.hexagon-item[data-position="bottom-left"] {
    bottom: 25%;
    left: 15%;
}

.hexagon-item[data-position="top-left"] {
    top: 25%;
    left: 15%;
}

.hexagon-item[data-position="extra"] {
    top: 50%;
    right: 5%;
    transform: translateY(-50%);
}

/* 六边形形状 */
.hexagon-shape {
    width: 100%;
    height: 100%;
    position: relative;
    background: linear-gradient(135deg, var(--white) 0%, #f8fafc 100%);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 2px solid transparent;
    background-clip: padding-box;
}

.hexagon-item:hover .hexagon-shape {
    background: linear-gradient(135deg, var(--primary-color) 0%, #4f46e5 100%);
    box-shadow: 0 12px 48px rgba(59, 130, 246, 0.3);
    transform: translateY(-4px);
}

.hexagon-item.center .hexagon-shape {
    background: linear-gradient(135deg, var(--primary-color) 0%, #4f46e5 100%);
    box-shadow: 0 12px 48px rgba(59, 130, 246, 0.4);
}

.hexagon-item.center:hover .hexagon-shape {
    background: linear-gradient(135deg, #1e40af 0%, #3730a3 100%);
}

/* 六边形内容 */
.hexagon-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    padding: var(--spacing-md);
    width: 80%;
    height: 80%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hex-icon {
    font-size: 32px;
    margin-bottom: var(--spacing-sm);
    display: block;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.hexagon-item.center .hex-icon {
    font-size: 40px;
    filter: drop-shadow(0 2px 8px rgba(255, 255, 255, 0.3));
}

.hex-title {
    font-size: 14px;
    font-weight: 700;
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--gray-900);
    line-height: 1.2;
}

.hexagon-item.center .hex-title {
    font-size: 18px;
    color: var(--white);
    margin-bottom: var(--spacing-sm);
}

.hexagon-item:hover .hex-title {
    color: var(--white);
}

.hex-subtitle {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
    font-weight: 500;
}

.hex-description {
    font-size: 11px;
    color: var(--gray-600);
    margin: 0 0 var(--spacing-xs) 0;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.hexagon-item:hover .hex-description {
    color: rgba(255, 255, 255, 0.9);
}

.hex-example {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-size: 10px;
    color: var(--gray-500);
    background: rgba(255, 255, 255, 0.8);
    padding: 2px 6px;
    border-radius: var(--radius-full);
    margin-top: auto;
}

.hexagon-item:hover .hex-example {
    background: rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
}

.example-icon {
    font-size: 10px;
}

/* 连接线动画 */
.hexagon-connections {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.connection-svg {
    width: 100%;
    height: 100%;
}

.connection-line {
    stroke-dasharray: 5, 5;
    animation: connectionFlow 3s linear infinite;
    opacity: 0.6;
}

@keyframes connectionFlow {
    0% {
        stroke-dashoffset: 0;
    }
    100% {
        stroke-dashoffset: 20;
    }
}

.hexagon-item:hover ~ .hexagon-connections .connection-line {
    opacity: 1;
    stroke-width: 3;
    animation-duration: 1s;
}

/* 背景装饰 */
.capabilities-hexagon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 70%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 30%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    animation: backgroundFloat 20s ease-in-out infinite;
    pointer-events: none;
}

@keyframes backgroundFloat {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    33% {
        transform: translate(30px, -30px) rotate(120deg);
    }
    66% {
        transform: translate(-20px, 20px) rotate(240deg);
    }
}

/* 上方区域：3个板块横向排列 */
.capabilities-top-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: calc(var(--spacing-xl) * 2);
    align-items: stretch;
}

/* 下方区域：4个板块2×2网格布局 */
.capabilities-bottom-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    align-items: stretch;
}

/* 确保所有卡片高度一致 */
.capabilities-top-row .capability-card,
.capabilities-bottom-grid .capability-card {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.capabilities-top-row .card-description,
.capabilities-bottom-grid .card-description {
    flex-grow: 1;
}

.capabilities-top-row .card-example,
.capabilities-bottom-grid .card-example {
    margin-top: auto;
}

/* 保留原有的capabilities-grid样式以防其他地方使用 */
.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.capabilities-grid .capability-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    border: 1px solid var(--gray-100);
}

.capabilities-grid .capability-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
}

.card-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-md);
}

.card-description {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.capabilities-grid .card-example {
    background: var(--very-light-blue);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--gray-700);
}

.capabilities-grid .card-example i {
    color: var(--primary-color);
}

/* ===== 优势区域 ===== */
.advantages {
    background: var(--white);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(280px, 1fr));
    grid-auto-rows: 1fr;
    gap: var(--spacing-2xl);
}

.advantage-item {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
    height: 100%; /* 等高 */
}

.advantage-number {
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.advantage-content {
    flex: 1;
}

.advantage-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-sm);
}

.advantage-description {
    font-size: 1rem;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ===== 服务对象区域 ===== */
.clients {
    background: var(--very-light-blue);
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.client-card {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
    text-align: center;
    border: 1px solid var(--gray-100);
}

.client-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.client-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 2rem;
    margin: 0 auto var(--spacing-lg);
}


.client-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: var(--spacing-md);
}

.client-description {
    font-size: 1rem;
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.client-benefits {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--gray-700);
    font-size: 0.9rem;
}

.benefit-item i {
    color: var(--primary-color);
    font-size: 0.8rem;
}



/* ===== 页脚 ===== */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: var(--spacing-xl) 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-info {
    text-align: right;
}

.footer-info p {
    margin-bottom: var(--spacing-xs);
    opacity: 0.8;
}

/* ===== 返回顶部按钮 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-normal);
    z-index: 1000;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

.back-to-top.show {
    display: flex;
}

/* ===== 响应式设计 ===== */
/* 平板设备 */
@media (max-width: 1024px) and (min-width: 769px) {
    .capabilities-top-row {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
    }
    
    .capabilities-bottom-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

/* 小平板设备 */
@media (max-width: 768px) and (min-width: 481px) {
    .capabilities-top-row {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
        margin-bottom: var(--spacing-xl);
    }
    
    .capabilities-bottom-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

/* 方案一响应式设计 */
@media (max-width: 1200px) {
    .capabilities-modern-grid {
        grid-template-columns: repeat(3, 1fr);
        grid-template-areas: 
            "featured featured standard1"
            "featured featured standard2"
            "standard3 standard4 standard5"
            "standard6 standard7 .";
    }
}

@media (max-width: 768px) {
    .capabilities-modern-grid {
        grid-template-columns: 1fr;
        grid-template-areas: 
            "featured"
            "standard1"
            "standard2"
            "standard3"
            "standard4"
            "standard5"
            "standard6"
            "standard7";
    }
    
    .featured-card .card-title {
        font-size: 20px;
    }
    
    .card-metrics {
        justify-content: center;
    }
    
    /* 方案二响应式设计 */
    .timeline-line {
        left: 30px;
        transform: none;
    }
    
    .timeline-item {
        justify-content: flex-start !important;
    }
    
    .timeline-marker {
        left: 30px;
        transform: translateX(-50%);
    }
    
    .marker-icon {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
    
    .marker-number {
        width: 28px;
        height: 28px;
        font-size: 12px;
    }
    
    .timeline-content {
        width: calc(100% - 80px);
        margin-left: 80px;
        margin-right: 0;
        text-align: left !important;
    }
    
    .timeline-card::before {
        left: -24px !important;
        right: auto !important;
        border-left-color: transparent !important;
        border-right-color: var(--white) !important;
    }
    
    .timeline-card.primary::before {
        border-right-color: var(--primary-color) !important;
    }
    
    .card-features {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    /* 方案三响应式设计 */
    .hexagon-grid {
        width: 100%;
        height: auto;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
        padding: var(--spacing-lg);
    }
    
    .hexagon-item {
        position: relative !important;
        width: 100% !important;
        height: 120px !important;
        transform: none !important;
        top: auto !important;
        left: auto !important;
        right: auto !important;
        bottom: auto !important;
    }
    
    .hexagon-item[data-position="center"] {
        grid-column: 1 / -1;
        width: 100% !important;
        height: 140px !important;
        margin-bottom: var(--spacing-md);
    }
    
    .hexagon-shape {
        clip-path: none !important;
        border-radius: var(--radius-xl) !important;
        background: var(--white) !important;
        border: 2px solid var(--gray-200) !important;
    }
    
    .hexagon-item.center .hexagon-shape {
        background: linear-gradient(135deg, var(--primary-color) 0%, #4f46e5 100%) !important;
    }
    
    .hexagon-item:hover .hexagon-shape {
        background: linear-gradient(135deg, var(--primary-color) 0%, #4f46e5 100%) !important;
    }
    
    .hexagon-content {
        position: static !important;
        transform: none !important;
        width: 100% !important;
        height: 100% !important;
        padding: var(--spacing-md) !important;
    }
    
    .hex-icon {
        font-size: 24px !important;
    }
    
    .hex-title {
        font-size: 16px !important;
    }
    
    .hex-description {
        font-size: 13px !important;
        -webkit-line-clamp: 3 !important;
    }
    
    .hex-example {
        font-size: 11px !important;
        margin-top: var(--spacing-sm) !important;
    }
    
    .hexagon-connections {
        display: none;
    }
    
    /* 布局切换器响应式设计 */
    .layout-switcher {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-xl);
    }
    
    .switcher-label {
        font-size: 14px;
    }
    
    .switcher-buttons {
        gap: var(--spacing-sm);
    }
    
    .layout-btn {
        min-width: 80px;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .btn-icon {
        font-size: 20px;
    }
    
    .btn-text {
        font-size: 12px;
    }
}

/* 手机设备 */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-2xl);
        transition: var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero {
        min-height: 80vh;
        padding: var(--spacing-xl) 0;
    }
    
    .hero-features {
        gap: var(--spacing-md);
    }
    
    .hero-feature {
        padding: var(--spacing-md);
        min-width: 120px;
    }
    
    .capabilities-grid {
        grid-template-columns: 1fr;
    }
    
    .capabilities-top-row {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        margin-bottom: var(--spacing-xl);
    }
    
    .capabilities-bottom-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xl);
    }
    
    .advantage-item {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .clients-grid {
        grid-template-columns: 1fr;
    }
    

    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-info {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-features {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }
    
    .hero-feature {
        width: 100%;
        max-width: 200px;
    }
    
    .capability-card,
    .client-card {
        padding: var(--spacing-lg);
    }
}

/* ===== 动画效果 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

/* ===== 滚动条样式 ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ===== 选择文本样式 ===== */
::selection {
    background: var(--primary-color);
    color: var(--white);
}

/* ===== 焦点样式 ===== */
:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}