/* 页面标题区域 */
.page-header {
    padding-top: 10rem;
    padding-bottom: 4rem;
    text-align: center;
    background-color: #0f1a2a;
    background-image: linear-gradient(to top, #0f1a2a 0%, transparent 100%),
    url('../../images/banner/banner-background7.jpg');
    background-size: cover;
    background-position: center;
    text-align: center;
    background-attachment: unset;
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(15, 26, 42, 0);
    z-index: 1;
}

.ie11 .page-header::before {
    background-color: rgba(15, 26, 42, 0);
}

.page-header h1 {
    font-size: 2.4rem;
    font-weight: 800;
    line-height: 2.2rem;
    margin-bottom: 1rem;
    color: #f0f4f8;
    position: relative;
    z-index: 2;
}

.page-subtitle {
    font-size: 1.25rem;
    color: #cbd5e1;
    max-width: 700px;
    margin: 0 auto 2rem;
    position: relative;
    z-index: 2;
}

.btn {
    padding: 0.4rem 2rem;
    border-radius: 50px;
    border: 2px solid #1bba9a; /* 原var(--primary-color) */
    position: relative;
    z-index: 2;
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid #1bba9a; /* 原var(--primary-color) */
    color: #1bba9a; /* 原var(--primary-color) */
}

.btn-secondary:hover {
    background-color: rgba(27, 186, 154, 0.1);
    color: #1bba9a;
}

/* 功能分类区域 */
.feature-category {
    margin-top: 3rem;
}

.category-header {
    display: flex;
    justify-content: center;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    text-align: center;
}

.category-icon {
    width: 60px;
    height: 60px;
    background: rgba(27, 186, 154, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1.5rem;
    flex-shrink: 0;
}

.category-icon i {
    font-size: 1.8rem;
    color: #1bba9a;
}

.category-title {
    font-size: 2rem;
    font-weight: 700;
    color: #f0f4f8;
    line-height: 1.2;
}

.category-desc {
    font-size: 1.1rem;
    color: #cbd5e1;
    margin-top: 0.5rem;
    max-width: 800px;
}

/* 功能卡片网格 - 使用Flexbox替代Grid以兼容IE11 */
.feature-grid {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -1rem;
}

.feature-card {
    background: #16253d; /* 原var(--bg-card) */
    border-radius: 12px;
    padding: 2.5rem;
    border: 1px solid #2d3748; /* 原var(--border-color) */
    transition: all 0.4s ease;
    width: calc(50% - 2rem);
    margin: 0 1rem 2rem;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
    position: relative;
    overflow: hidden;
}

/* 修复悬停效果 */
.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
    border-color: #1bba9a; /* 原var(--primary-color) */
}

.feature-card-header {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
}

.feature-card-icon {
    width: 50px;
    height: 50px;
    background: rgba(27, 186, 154, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1.2rem;
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.feature-card:hover .feature-card-icon {
    transform: scale(1.05);
    background: rgba(27, 186, 154, 0.2);
}

.feature-card-icon i {
    font-size: 1.5rem;
    color: #1bba9a; /* 原var(--primary-color) */
}

.feature-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #f0f4f8; /* 原var(--text-light) */
    line-height: 1.3;
}

.feature-card-desc {
    color: #cbd5e1; /* 原var(--text-gray) */
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.feature-card-features {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.feature-card-features h4 {
    font-size: 1.1rem;
    color: #f0f4f8;
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
}

.feature-card-features h4 i {
    margin-right: 0.5rem;
    color: #1bba9a;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 0.5rem 0;
    color: #cbd5e1;
    display: flex;
    align-items: flex-start;
}

.feature-list li i {
    color: #1bba9a;
    margin-right: 0.7rem;
    margin-top: 0.3rem;
    font-size: 0.9rem;
}

/* 技术规格区域 */
.tech-specs {
    background-color: rgba(15, 26, 42, 0.5);
    border-radius: 12px;
    padding: 2.5rem;
    border: 1px solid #2d3748;
}

.tech-specs h3 {
    font-size: 1.8rem;
    color: #f0f4f8;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
}

.tech-specs h3 i {
    margin-right: 0.8rem;
    color: #1bba9a;
}

.specs-grid {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -1rem;
}

.spec-item {
    width: calc(33.333% - 2rem);
    margin: 0 1rem 1.5rem;
    padding: 1.2rem;
    background-color: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.spec-item h4 {
    font-size: 1.1rem;
    color: #f0f4f8;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.spec-item h4 i {
    margin-right: 0.5rem;
    color: #1bba9a;
    font-size: 0.9rem;
}

.spec-item p {
    color: #cbd5e1;
    font-size: 0.95rem;
}

/* CTA区域 */
.cta-section {
    text-align: center;
    background-color: rgba(27, 186, 154, 0.05);
    border-radius: 12px;
    padding: 4rem 2rem;
    margin-top: 3rem;
    margin-bottom: 4rem;
    border: 1px solid rgba(27, 186, 154, 0.2);
}

.cta-section h2 {
    font-size: 2.2rem;
    color: #f0f4f8;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.1rem;
    color: #cbd5e1;
    max-width: 700px;
    margin: 0 auto 2rem;
}

.cta-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

/* 响应式设计 */
@media (max-width: 1100px) {
    .spec-item {
        width: calc(50% - 2rem);
    }
}

@media (max-width: 992px) {
    .page-header h1 {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding-top: 8rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .feature-category {
        margin-top: 2rem;
    }

    .feature-card {
        width: 100%;
        margin: 0 0 2rem 0;
    }

    .feature-grid {
        margin: 0;
    }

    .spec-item {
        width: 100%;
        margin: 0 0 1rem 0;
    }

    .specs-grid {
        margin: 0;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .category-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .category-icon {
        margin-right: 0;
        margin-bottom: 1rem;
    }

    .cta-section {
        margin-top: 2rem;
    }
}

@media (max-width: 480px) {
    .feature-card,
    .tech-specs {
        padding: 1.5rem;
    }

    .page-header h1 {
        font-size: 1.8rem;
    }

    .category-title {
        font-size: 1.7rem;
    }

    .cta-buttons .btn {
        width: 100%;
        margin-bottom: 1rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .btn, .btn-secondary {
        padding: 0.75rem 1.5rem !important;
    }
}

/* IE11 特定兼容性样式 */
@media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
    /* 修复卡片背景和文字颜色 */
    .feature-card,
    .tech-specs {
        background-color: #16253d;
        color: #cbd5e1;
    }

    .feature-card-title,
    .category-title,
    .tech-specs h3 {
        color: #f0f4f8;
    }

    .feature-card-desc,
    .category-desc,
    .tech-specs p {
        color: #cbd5e1;
    }

    /* 修复卡片悬停效果 */
    .feature-card:hover {
        border-color: #1bba9a;
        margin-top: -10px;
        margin-bottom: 30px;
    }

    /* 修复按钮悬停效果 */
    .btn:hover {
        background-color: #169c80;
        margin-top: -3px;
        margin-bottom: 3px;
    }

    .btn-secondary:hover {
        background-color: rgba(27, 186, 154, 0.1);
        margin-top: -3px;
        margin-bottom: 3px;
    }

    /* 修复Flexbox布局 */
    .feature-grid,
    .specs-grid {
        display: -ms-flexbox;
        -ms-flex-wrap: wrap;
    }
}