* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', sans-serif;
}

body {
    background-color: #F9FAFB;
    color: #121826;
    line-height: 1.7;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(108, 99, 255, 0.03) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(0, 136, 204, 0.03) 0%, transparent 20%);
}

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

/* 标题样式 */
h1 {
    font-size: 3rem;
    line-height: 1.25;
    font-weight: 800;
    margin-bottom: 25px;
    background: linear-gradient(90deg, #0088CC, #6C63FF);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    position: relative;
    text-align: center;
}

h1::after {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: -10px;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #0088CC, #6C63FF);
    border-radius: 2px;
}

h2 {
    font-size: 2.2rem;
    line-height: 1.3;
    font-weight: 700;
    margin-bottom: 20px;
    position: relative;
    color: #121826;
    text-align: center;
}

h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #0088CC, #6C63FF);
    border-radius: 2px;
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 18px;
    color: #1A1F2C;
}

h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 15px;
}

/* 文本样式 */
p {
    font-size: 1.05rem;
    color: #374151;
    margin-bottom: 1.2rem;
}

.section-description {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
    color: #374151;
    font-size: 1.05rem;
    line-height: 1.7;
}

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

.text-blue {
    color: #0088CC;
}

/* 链接样式 */
.link {
    color: #0088CC;
    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: #6C63FF;
    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: linear-gradient(90deg, #0088CC, #6C63FF);
    color: #FFFFFF;
    box-shadow: 0 4px 20px rgba(108, 99, 255, 0.25);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(108, 99, 255, 0.35);
}

.btn-outline {
    background-color: transparent;
    color: #0088CC;
    border: 1px solid #0088CC;
}

.btn-outline:hover {
    background-color: rgba(0, 136, 204, 0.05);
    transform: translateY(-3px);
}

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

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

.section-dark {
    background-color: #1A1F2C;
    color: #FFFFFF;
}

.section-dark p {
    color: rgba(255, 255, 255, 0.8);
}

.section-dark h2 {
    color: #FFFFFF;
}

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

.decor-circle {
    width: 700px;
    height: 700px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(108, 99, 255, 0.05) 0%, transparent 70%);
    top: -350px;
    right: -350px;
}

.decor-circle-2 {
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 136, 204, 0.05) 0%, transparent 70%);
    bottom: -250px;
    left: -250px;
}

.decor-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(rgba(0, 136, 204, 0.05) 1px, transparent 1px),
                     linear-gradient(90deg, rgba(0, 136, 204, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: 0;
    pointer-events: none;
}

/* 头部区域 */
.header {
    padding: 120px 0;
    position: relative;
}

.header-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.header p {
    font-size: 1.2rem;
    color: #374151;
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.telegram-icon {
    font-size: 5rem;
    color: #0088CC;
    margin-bottom: 40px;
    text-shadow: 0 5px 30px rgba(0, 136, 204, 0.2);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

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

.intro-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

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

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.feature-item {
    background-color: #F9FAFB;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    color: #333;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #0088CC, #6C63FF);
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(108, 99, 255, 0.15);
}

.feature-icon {
    font-size: 2rem;
    color: #0088CC;
    margin-bottom: 20px;
}

/* 内容分类板块 - 文章列表形式 */
.categories {
    background-color: #F9FAFB;
    position: relative;
}

.category-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 50px;
    padding-bottom: 20px;
    border-bottom: 1px solid #E5E7EB;
    justify-content: center;
}

.category-filter {
    padding: 10px 24px;
    background-color: #FFFFFF;
    border: 1px solid #E5E7EB;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 8px;
    color: #333;
}

.category-filter.active {
    background: linear-gradient(90deg, #0088CC, #6C63FF);
    color: #FFFFFF;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(108, 99, 255, 0.2);
}

.category-filter:hover:not(.active) {
    border-color: #0088CC;
    color: #0088CC;
}

/* 文章列表样式 */
.articles-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-top: 20px;
}

.article-item {
    background-color: #FFFFFF;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.article-item::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 5px;
    height: 0;
    background: linear-gradient(180deg, #0088CC, #6C63FF);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.article-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(108, 99, 255, 0.15);
}

.article-item:hover::after {
    height: 100%;
}

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

.article-category {
    display: inline-block;
    padding: 5px 14px;
    background-color: rgba(0, 136, 204, 0.1);
    color: #0088CC;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.article-date {
    font-size: 0.9rem;
    color: #6B7280;
    display: flex;
    align-items: center;
    gap: 5px;
}

.article-date i {
    color: #0088CC;
}

.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: #121826;
    text-decoration: none;
}

.article-title a:hover {
    color: #0088CC;
}

.article-excerpt {
    color: #374151;
    font-size: 1rem;
    margin-bottom: 15px;
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.9rem;
    color: #6B7280;
    margin-top: auto;
}

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

.article-meta .views i {
    color: #0088CC;
}

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

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 35px;
    margin-top: 40px;
}

.article-card {
    border-radius: 12px;
    overflow: hidden;
    background-color: #F9FAFB;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.article-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #0088CC, #6C63FF);
}

.article-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(108, 99, 255, 0.15);
}

.article-card-content {
    padding: 30px;
}

.article-card-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    font-size: 0.9rem;
    color: #6B7280;
}

.article-card-meta i {
    color: #0088CC;
}

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

.article-card-title a {
    color: #121826;
    text-decoration: none;
}

.article-card-title a:hover {
    color: #0088CC;
}

.article-card-excerpt {
    color: #374151;
    font-size: 0.95rem;
    margin-bottom: 20px;
}

/* FAQ模块 */
.faq {
    background-color: #F9FAFB;
    position: relative;
}

.faq-container {
    max-width: 800px;
    margin: 50px auto 0;
    position: relative;
    z-index: 1;
}

.faq-item {
    margin-bottom: 20px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    background-color: #FFFFFF;
}

.faq-question {
    width: 100%;
    padding: 22px 30px;
    text-align: left;
    background-color: #FFFFFF;
    border: none;
    font-size: 1.1rem;
    font-weight: 600;
    color: #121826;
    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: #F9FAFB;
}

.faq-question i {
    color: #0088CC;
    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);
    color: #6B7280;
}

.faq-question.active .toggle-icon {
    transform: rotate(180deg);
    color: #0088CC;
}

.faq-answer {
    padding: 0 30px 0 69px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    background-color: #FFFFFF;
}

.faq-answer.active {
    padding: 0 30px 30px 69px;
    max-height: 500px;
}

.faq-answer p {
    color: #374151;
    line-height: 1.7;
}

.faq-answer ul {
    margin-left: 20px;
    margin-bottom: 15px;
    color: #374151;
}

.faq-answer li {
    margin-bottom: 8px;
}

/* 结尾CTA */
.cta {
    background: linear-gradient(135deg, #193681 0%, #050f24 100%);
    color: #FFFFFF;
    padding: 120px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 30% 30%, rgba(0, 136, 204, 0.1) 0%, transparent 30%),
        radial-gradient(circle at 70% 70%, rgba(108, 99, 255, 0.1) 0%, transparent 30%);
    z-index: 0;
}

.cta-content {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
    z-index: 1;
}

.cta h2 {
    color: #FFFFFF;
}

.cta h2::after {
    background: linear-gradient(90deg, #0088CC, #6C63FF);
}

.cta p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .container {
        max-width: 90%;
    }
    
    h1 {
        font-size: 2.6rem;
    }
    
    h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }
    
    h1 {
        font-size: 2.2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    h3 {
        font-size: 1.4rem;
    }
    
    .header {
        padding: 100px 0;
    }
    
    .telegram-icon {
        font-size: 4rem;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 1.9rem;
    }
    
    h2 {
        font-size: 1.6rem;
    }
    
    .header {
        padding: 80px 0;
    }
    
    .header p {
        font-size: 1.1rem;
    }
    
    .btn {
        width: 100%;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .article-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
}

/* 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; }