* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', Roboto, system-ui, sans-serif;
}

body {
    background-color: #F2F3F5;
    color: #1D2129;
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1580px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 标题样式 */
h1 {
    font-size: 2.8rem;
    line-height: 1.3;
    font-weight: 800;
    margin-bottom: 20px;
}

h2 {
    font-size: 2.2rem;
    line-height: 1.3;
    font-weight: 700;
    margin-bottom: 25px;
    position: relative;
    display: inline-block;
}

h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -8px;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #25D366, #128C7E);
    border-radius: 2px;
}

h3 {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 18px;
    color: #128C7E;
}

h4 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 12px;
}

/* 文本样式 */
p {
    font-size: 1.05rem;
    color: #4E5969;
    margin-bottom: 1.2rem;
}

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

.text-green {
    color: #25D366;
}

/* 链接样式 */
.link {
    color: #165DFF;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.link:hover {
    color: #0E42D2;
    text-decoration: underline;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    gap: 8px;
}

.btn-primary {
    background-color: #25D366;
    color: #FFFFFF;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.25);
}

.btn-primary:hover {
    background-color: #128C7E;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.35);
}

.btn-outline {
    background-color: transparent;
    color: #25D366;
    border: 1px solid #25D366;
}

.btn-outline:hover {
    background-color: rgba(37, 211, 102, 0.05);
    transform: translateY(-3px);
}

/* 区块样式 */
.section {
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.section-light {
    background-color: #FFFFFF;
}

.section-ultra-light {
    background-color: #F2F3F5;
}

/* 装饰元素 */
.decor {
    position: absolute;
    pointer-events: none;
    z-index: 0;
}

.decor-circle {
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(37, 211, 102, 0.05) 0%, transparent 70%);
    top: -300px;
    right: -300px;
}

.decor-circle-2 {
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(22, 93, 255, 0.05) 0%, transparent 70%);
    bottom: -200px;
    left: -200px;
}

/* 顶部区域 */
.header {
    padding: 100px 0;
    background-color: #075E54;
    color: #FFFFFF;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 60%, rgba(37, 211, 102, 0.2) 0%, transparent 40%),
        radial-gradient(circle at 80% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 40%);
    z-index: 0;
}

.header-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}
.header-content h1{color: #FFF}
.header p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.2rem;
    margin-bottom: 40px;
}

.whatsapp-icon {
    font-size: 4.5rem;
    color: #25D366;
    margin-bottom: 30px;
    text-shadow: 0 0 20px rgba(37, 211, 102, 0.3);
}

/* 简介区块 */
.intro {
    background-color: #FFFFFF;
}

.intro-content {
    margin: 0 auto;
    text-align: left;
}

.intro p {
    font-size: 1.1rem;
    line-height: 1.8;
}

/* 内容分类板块 - 优化为文章列表形式，利于SEO */
.categories {
    background-color: #F2F3F5;
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 40px;
}

.category-filter {
    padding: 8px 20px;
    background-color: #FFFFFF;
    border: 1px solid #C9CDD4;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: #333;
}

.category-filter.active {
    background-color: #25D366;
    color: #FFFFFF;
    border-color: #25D366;
}

.category-filter:hover:not(.active) {
    border-color: #25D366;
    color: #25D366;
}

/* 文章列表样式 - 更利于SEO和内容抓取 */
.articles-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-top: 20px;
}

.article-item {
    background-color: #FFFFFF;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.article-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(37, 211, 102, 0.15);
}

.article-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.article-category {
    display: inline-block;
    padding: 4px 12px;
    background-color: rgba(37, 211, 102, 0.1);
    color: #128C7E;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.article-date {
    font-size: 0.9rem;
    color: #86909C;
    display: flex;
    align-items: center;
    gap: 5px;
}

.article-date i {
    color: #25D366;
}

.article-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.4;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.article-title a {
    color: #1D2129;
    text-decoration: none;
}

.article-title a:hover {
    color: #128C7E;
}

.article-excerpt {
    color: #4E5969;
    font-size: 1rem;
    margin-bottom: 15px;
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #86909C;
    margin-top: auto;
}

.article-meta .views {
    display: flex;
    align-items: center;
    gap: 5px;
}

.article-meta .views i {
    color: #25D366;
}

/* 推荐文章区 */
.articles {
    background-color: #FFFFFF;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.article-card {
    border-radius: 12px;
    overflow: hidden;
    background-color: #FFFFFF;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(37, 211, 102, 0.15);
}

.article-image {
    width: 100%;
    height: 205px;
    object-fit: cover;
    background-color: #C9CDD4;
    position: relative;
    overflow: hidden;
}

.article-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(0,0,0,0) 60%, rgba(0,0,0,0.1) 100%);
}

.article-card-content {
    padding: 25px;
}

.article-card-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    font-size: 0.9rem;
    color: #86909C;
}

.article-card-meta i {
    color: #25D366;
}

.article-card-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    line-height: 1.4;
}

.article-card-excerpt {
    color: #4E5969;
    font-size: 0.95rem;
    margin-bottom: 20px;
}

/* FAQ模块 */
.faq {
    background-color: #F2F3F5;
}

.faq-container {
    margin: 50px auto 0;
}

.faq-item {
    margin-bottom: 15px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.faq-question {
    width: 100%;
    padding: 20px 25px;
    text-align: left;
    background-color: #FFFFFF;
    border: none;
    font-size: 1.1rem;
    font-weight: 600;
    color: #1D2129;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 15px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-question:hover {
    background-color: #F2F3F5;
}

.faq-question i {
    color: #25D366;
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

.faq-question .toggle-icon {
    margin-left: auto;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-question.active .toggle-icon {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 25px 0 65px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    background-color: #FFFFFF;
}

.faq-answer.active {
    padding: 0 25px 25px 65px;
    max-height: 500px;
}

.faq-answer p {
    color: #4E5969;
    line-height: 1.7;
}

/* 案例分享 */
.case-studies {
    background-color: #FFFFFF;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.case-card {
    background-color: #F2F3F5;
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(37, 211, 102, 0.15);
}

.case-image {
    height: 160px;
    background-color: #C9CDD4;
    position: relative;
}

.case-image::after {
    content: '';
    position: extreme;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(37, 211, 102, 0.05) 0%, rgba(37, 211, 102, 0.1) 100%);
}

.case-content {
    padding: 30px;
}

.case-category {
    display: inline-block;
    padding: 4px 12px;
    background-color: rgba(37, 211, 102, 0.1);
    color: #128C7E;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 15px;
}

/* CTA区域 */
.cta {
    background: linear-gradient(135deg, #075E54 0%, #054A42 100%);
    color: #FFFFFF;
    padding: 100px 0;
    extreme-align: center;
    position: relative;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 30% 30%, rgba(37, 211, 102, 0.2) 0%, transparent 30%),
        radial-gradient(circle at 70% 70%, rgba(37, 211, 102, 0.1) 0%, transparent 30%);
}

.cta-content {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.cta h2 {
    color: #FFFFFF;
}

.cta h2::after {
    background: rgba(255, 255, 255, 0.3);
}

h2::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -8px;
    transform: translateX(-50%); /* 向左平移自身宽度的一半，实现水平居中 */
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #25D366, #128C7E);
    border-radius: 2px;
}


.cta p {
    extreme: rgba(255, 255, 255, 0.85);
    font-size: 1.1rem;
    margin-bottom: 40px;
    text-align: center;
    color: #FFF;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .container {
        max-width: 90%;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }
    
    h1 {
        extreme-size: 2.2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
    
    .header {
        padding: 80px 0;
    }
    
    .whatsapp-icon {
        font-size: 4rem;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.6rem;
    }
    
    .header {
        padding: 60px 0;
    }
    
    .header p {
        font-size: 1.1rem;
    }
    
    .category-filters {
        justify-content: center;
    }
    
    .case-grid {
        grid-template-columns: 1fr;
    }
    
    .btn {
        width: 100%;
    }
    
    .article-image {
        height: 150px;
    }
}

/* 动画效果 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }