/* 模块五：辩论队能带来什么 */

/* 整体容器 */
#benefits {
    width: 100%;
    padding: 3rem 1rem; /* 减小移动端顶部和底部内边距 */
    background-color: #FFFFFF;
    font-family: 'Inter', 'system-ui', 'sans-serif';
    box-sizing: border-box;
    position: relative;
    z-index: 5; /* 设置z-index层级 */
}

@media (min-width: 768px) {
    #benefits {
        padding: 4rem 2rem; /* 调整平板端内边距 */
    }
}

@media (min-width: 1024px) {
    #benefits {
        padding: 5rem 4rem; /* 桌面端保持原有内边距 */
    }
}

/* 移动端优化 */
@media (max-width: 767px) {
    #benefits {
        padding: 2rem 1rem; /* 进一步减小移动端内边距 */
    }
    
    #benefits .title-section {
        margin-bottom: 2rem; /* 减小标题区域底部外边距 */
        padding-top: 1.5rem; /* 增加顶部内边距，确保与模块四有足够间距 */
    }
    
    #benefits-title {
        font-size: 1.8rem; /* 调整移动端标题字体大小 */
        margin-bottom: 0.75rem;
    }
    
    #benefits .title-decoration {
        width: 4rem; /* 减小装饰线宽度 */
        height: 0.2rem; /* 减小装饰线高度 */
        margin: 0 auto 1rem;
    }
    
    #benefits-subtitle {
        font-size: 1rem; /* 调整副标题字体大小 */
        margin: 0 auto;
        line-height: 1.5; /* 调整行高 */
    }
    
    #benefits .cards-container {
        gap: 1.5rem; /* 减小卡片间距 */
        margin-top: 1rem; /* 增加顶部外边距 */
    }
    
    #benefits .benefit-card .image-container {
        height: 12rem; /* 减小图片容器高度 */
    }
    
    #benefits .benefit-card .content {
        padding: 1.25rem; /* 减小内容区域内边距 */
    }
    
    #benefits .benefit-card .icon-container {
        width: 2.5rem; /* 减小图标容器大小 */
        height: 2.5rem;
        margin-bottom: 0.75rem;
    }
    
    #benefits .benefit-card .icon {
        font-size: 1.25rem; /* 减小图标大小 */
    }
    
    #benefits .benefit-card .card-title {
        font-size: 1.125rem; /* 调整卡片标题字体大小 */
        margin-bottom: 0.5rem;
    }
    
    #benefits .benefit-card .card-description {
        font-size: 0.875rem; /* 调整卡片描述字体大小 */
        line-height: 1.5; /* 调整行高 */
    }
}

/* 小屏幕设备优化（480px以下） */
@media (max-width: 480px) {
    #benefits {
        padding: 1.5rem 0.75rem; /* 进一步减小内边距 */
    }
    
    #benefits .title-section {
        margin-bottom: 1.5rem; /* 进一步减小标题区域底部外边距 */
        padding-top: 1.25rem; /* 增加顶部内边距 */
    }
    
    #benefits-title {
        font-size: 1.6rem; /* 进一步减小标题字体大小 */
        margin-bottom: 0.5rem;
    }
    
    #benefits .title-decoration {
        width: 3rem; /* 进一步减小装饰线宽度 */
        height: 0.15rem; /* 进一步减小装饰线高度 */
        margin: 0 auto 0.75rem;
    }
    
    #benefits-subtitle {
        font-size: 0.9rem; /* 进一步减小副标题字体大小 */
        line-height: 1.4; /* 调整行高 */
    }
    
    #benefits .cards-container {
        gap: 1.25rem; /* 进一步减小卡片间距 */
    }
    
    #benefits .benefit-card .image-container {
        height: 10rem; /* 进一步减小图片容器高度 */
    }
    
    #benefits .benefit-card .content {
        padding: 1rem; /* 进一步减小内容区域内边距 */
    }
    
    #benefits .benefit-card .icon-container {
        width: 2rem; /* 进一步减小图标容器大小 */
        height: 2rem;
        margin-bottom: 0.5rem;
    }
    
    #benefits .benefit-card .icon {
        font-size: 1rem; /* 进一步减小图标大小 */
    }
    
    #benefits .benefit-card .card-title {
        font-size: 1rem; /* 进一步减小卡片标题字体大小 */
        margin-bottom: 0.4rem;
    }
    
    #benefits .benefit-card .card-description {
        font-size: 0.8rem; /* 进一步减小卡片描述字体大小 */
        line-height: 1.4; /* 调整行高 */
    }
}

/* 超小屏幕设备优化（320px及以下） */
@media (max-width: 320px) {
    #benefits {
        padding: 1.25rem 0.5rem; /* 进一步减小内边距 */
    }
    
    #benefits .title-section {
        margin-bottom: 1.25rem; /* 进一步减小标题区域底部外边距 */
        padding-top: 1rem; /* 增加顶部内边距 */
    }
    
    #benefits-title {
        font-size: 1.4rem; /* 进一步减小标题字体大小 */
        margin-bottom: 0.4rem;
    }
    
    #benefits .title-decoration {
        width: 2.5rem; /* 进一步减小装饰线宽度 */
        height: 0.125rem; /* 进一步减小装饰线高度 */
        margin: 0 auto 0.6rem;
    }
    
    #benefits-subtitle {
        font-size: 0.8rem; /* 进一步减小副标题字体大小 */
        line-height: 1.3; /* 调整行高 */
    }
    
    #benefits .cards-container {
        gap: 1rem; /* 进一步减小卡片间距 */
    }
    
    #benefits .benefit-card .image-container {
        height: 8rem; /* 进一步减小图片容器高度 */
    }
    
    #benefits .benefit-card .content {
        padding: 0.875rem; /* 进一步减小内容区域内边距 */
    }
    
    #benefits .benefit-card .icon-container {
        width: 1.75rem; /* 进一步减小图标容器大小 */
        height: 1.75rem;
        margin-bottom: 0.4rem;
    }
    
    #benefits .benefit-card .icon {
        font-size: 0.875rem; /* 进一步减小图标大小 */
    }
    
    #benefits .benefit-card .card-title {
        font-size: 0.875rem; /* 进一步减小卡片标题字体大小 */
        margin-bottom: 0.3rem;
    }
    
    #benefits .benefit-card .card-description {
        font-size: 0.75rem; /* 进一步减小卡片描述字体大小 */
        line-height: 1.3; /* 调整行高 */
    }
}

/* 标题区域 */
#benefits .title-section {
    text-align: center;
    margin-bottom: 4rem;
    opacity: 0;
}

#benefits-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: #1D2129;
    margin-bottom: 1rem;
}

#benefits .title-decoration {
    width: 6rem;
    height: 0.25rem;
    background-color: #165DFF;
    margin: 0 auto 1.5rem;
}

#benefits-subtitle {
    font-size: 1.125rem;
    color: #6B7280;
    max-width: 42rem;
    margin: 0 auto;
    text-align: center;
}

/* 卡片网格容器 */
#benefits .cards-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    #benefits .cards-container {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 卡片通用样式 */
#benefits .benefit-card {
    background-color: #FFFFFF;
    border-radius: 0.75rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.3s ease;
    opacity: 0;
}

#benefits .benefit-card:hover {
    transform: translateY(-0.5rem);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

#benefits .benefit-card .image-container {
    height: 14rem;
    overflow: hidden;
}

#benefits .benefit-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

#benefits .benefit-card:hover img {
    transform: scale(1.05);
}

#benefits .benefit-card .content {
    padding: 1.5rem;
}

#benefits .benefit-card .icon-container {
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

#benefits #happiness-card .icon-container {
    background-color: rgba(22, 93, 255, 0.1);
}

#benefits #language-card .icon-container {
    background-color: rgba(54, 207, 201, 0.1);
}

#benefits #network-card .icon-container {
    background-color: rgba(255, 125, 0, 0.1);
}

#benefits .benefit-card .icon {
    font-size: 1.5rem;
}

#benefits #happiness-card .icon {
    color: #165DFF;
}

#benefits #language-card .icon {
    color: #36CFC9;
}

#benefits #network-card .icon {
    color: #FF7D00;
}

#benefits .benefit-card .card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1D2129;
    margin-bottom: 0.75rem;
}

#benefits .benefit-card .card-description {
    color: #6B7280;
    line-height: 1.5;
}

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* 动画类 */
#benefits .animate-fade-in {
    animation: fadeIn 0.8s ease-in-out forwards;
}

#benefits .animate-slide-up {
    animation: slideUp 0.6s ease-out forwards;
}

/* 卡片动画延迟 */
#benefits #happiness-card {
    animation-delay: 0.4s;
}

#benefits #language-card {
    animation-delay: 0.6s;
}

#benefits #network-card {
    animation-delay: 0.8s;
}

/* 滚动观察器 */
#benefits .visible,
#benefits .title-section.visible,
#benefits .benefit-card.visible {
    opacity: 1;
    transform: translateY(0);
}