/* ===========================================
   功能页专用样式 - 暖色企业商务风卡片布局
   =========================================== */

/* ===========================================
   主内容区域
   =========================================== */

main {
    padding-top: 72px;
    background: var(--bg-primary);
    min-height: calc(100vh - 72px);
}

/* ===========================================
   页面头部 - 暖色渐变背景居中布局
   =========================================== */

.page-header {
    padding: 80px 0 48px;
    background: linear-gradient(180deg, var(--accent-bg) 0%, var(--bg-primary) 100%);
    text-align: center;
}

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

.page-header .section-tag {
    margin-bottom: 20px;
}

.page-title {
    font-family: var(--font-display);
    font-size: 44px;
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.page-description {
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
}

/* ===========================================
   筛选按钮组
   =========================================== */

.filter-group {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    padding: 8px 22px;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    background: var(--bg-white);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.filter-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-hover);
    background: var(--accent-bg);
}

.filter-btn.active {
    background: var(--accent-gradient);
    color: var(--text-white);
    border-color: transparent;
    box-shadow: var(--shadow-accent);
}

/* ===========================================
   功能卡片网格
   =========================================== */

.features-grid-section {
    padding: 56px 0 80px;
}

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

/* ===========================================
   功能卡片
   =========================================== */

.feature-card {
    background: var(--bg-white);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    padding: 28px;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-normal);
    position: relative;
}

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

.feature-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.feature-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    background: var(--accent-light);
    color: var(--accent-hover);
    flex-shrink: 0;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.4;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    flex: 1;
    margin-bottom: 20px;
}

.feature-card-footer {
    display: flex;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--border-color-light);
}

/* ===========================================
   分类标签
   =========================================== */

.category-tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    letter-spacing: 0.02em;
}

.tag-core {
    background: rgba(37, 99, 235, 0.08);
    color: #2563EB;
}

.tag-analytics {
    background: rgba(5, 150, 105, 0.08);
    color: #059669;
}

.tag-operation {
    background: rgba(124, 58, 237, 0.08);
    color: #7C3AED;
}

.tag-marketing {
    background: rgba(234, 88, 12, 0.08);
    color: #EA580C;
}

.tag-developer {
    background: rgba(107, 114, 128, 0.08);
    color: #6B7280;
}

/* ===========================================
   状态徽章
   =========================================== */

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.status-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-active {
    background: rgba(5, 150, 105, 0.08);
    color: var(--success-green);
}

.status-active::before {
    background: var(--success-green);
}

.status-beta {
    background: rgba(217, 119, 6, 0.08);
    color: var(--warning-amber);
}

.status-beta::before {
    background: var(--warning-amber);
}

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

@media (max-width: 1024px) {
    .page-title {
        font-size: 36px;
    }

    .features-grid {
        gap: 20px;
    }

    .feature-card {
        padding: 24px;
    }
}

@media (max-width: 768px) {
    main {
        padding-top: 64px;
    }

    .page-header {
        padding: 56px 0 36px;
    }

    .page-title {
        font-size: 30px;
    }

    .page-description {
        font-size: 16px;
        margin-bottom: 32px;
    }

    .filter-group {
        gap: 8px;
    }

    .filter-btn {
        padding: 6px 16px;
        font-size: 13px;
    }

    .features-grid-section {
        padding: 40px 0 60px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .feature-card {
        padding: 20px;
    }

    .feature-card-icon {
        width: 42px;
        height: 42px;
        font-size: 18px;
    }

    .feature-card h3 {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: 48px 0 28px;
    }

    .page-title {
        font-size: 26px;
    }

    .page-description {
        font-size: 15px;
        margin-bottom: 28px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .feature-card {
        padding: 20px;
    }

    .feature-card h3 {
        font-size: 16px;
    }

    .feature-card p {
        font-size: 13px;
    }
}