* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: #FBFDF8;
    color: #1E2F2F;
    line-height: 1.5;
    scroll-behavior: smooth;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
}

/* 导航栏 */
.navbar {
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(8px);
    box-shadow: 0 2px 15px rgba(0, 20, 10, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
    transition: all 0.2s ease;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #2B7A62, #3AA06B);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    cursor: pointer;
}

.logo span {
    font-weight: 500;
    background: none;
    color: #2B5E4C;
}

.nav-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    font-weight: 500;
    color: #2D4A3E;
    transition: 0.2s;
    font-size: 1rem;
}

.nav-links a:hover {
    color: #2B7A62;
    transform: translateY(-2px);
}

/* 按钮风格 */
.btn-primary {
    background: #2B7A62;
    color: white;
    padding: 0.7rem 1.5rem;
    border-radius: 40px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.25s;
    display: inline-block;
    text-decoration: none;
    box-shadow: 0 4px 8px rgba(43, 122, 98, 0.2);
}

.btn-primary:hover {
    background: #1F5E4C;
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(43, 122, 98, 0.25);
}

.btn-outline {
    background: transparent;
    border: 2px solid #2B7A62;
    color: #2B7A62;
    padding: 0.6rem 1.4rem;
    border-radius: 40px;
    font-weight: 600;
    transition: 0.2s;
    cursor: pointer;
    display: inline-block;
    text-decoration: none;
}

.btn-outline:hover {
    background: #2B7A62;
    color: white;
    transform: translateY(-2px);
}

/* QQ群加入按钮样式 */
.btn-qq-group {
    background: #12B7F5;
    color: white;
    padding: 0.7rem 1.8rem;
    border-radius: 40px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.25s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    margin: 1rem 0 0;
    box-shadow: 0 4px 8px rgba(18, 183, 245, 0.2);
}

.btn-qq-group:hover {
    background: #0E9BD4;
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(18, 183, 245, 0.25);
}

/* Hero 区域 */
.hero {
    padding: 4rem 0 5rem 0;
    text-align: center;
    background: linear-gradient(145deg, #F5F9F2 0%, #FFFFFF 100%);
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, #205A48, #3F9E7A);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero .highlight {
    color: #2B7A62;
    background: none;
    background-clip: unset;
    -webkit-background-clip: unset;
}

.hero p {
    font-size: 1.25rem;
    color: #3A5A4E;
    max-width: 700px;
    margin: 0 auto 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* 三大特色 */
.features {
    padding: 4rem 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    color: #1C3D32;
    position: relative;
}
.section-title:after {
    content: '';
    width: 70px;
    height: 4px;
    background: #2B7A62;
    display: block;
    margin: 0.6rem auto 0;
    border-radius: 4px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: #FEFEF9;
    padding: 2rem 1.5rem;
    border-radius: 28px;
    text-align: center;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.02), 0 4px 8px rgba(0, 0, 0, 0.03);
    transition: 0.25s ease;
    border: 1px solid #E9F0E6;
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 30px -12px rgba(43, 122, 98, 0.15);
    border-color: #CDE3D9;
}
.feature-icon {
    font-size: 2.8rem;
    color: #2B7A62;
    margin-bottom: 1rem;
}
.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.8rem;
}
.feature-card p {
    color: #4C6B5E;
}

/* 知识分享卡片区 */
.knowledge {
    padding: 4rem 0;
    background-color: #F9FCF7;
}
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}
.knowledge-card {
    background: white;
    border-radius: 24px;
    overflow: hidden;
    transition: all 0.3s;
    box-shadow: 0 5px 15px rgba(0,0,0,0.03);
    border: 1px solid #ECF3EA;
}
.knowledge-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 24px 36px -12px rgba(0, 0, 0, 0.12);
}
.card-content {
    padding: 1.6rem;
}
.card-tag {
    background: #E2F0EA;
    color: #2B7A62;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.8rem;
    border-radius: 30px;
    display: inline-block;
    margin-bottom: 1rem;
}
.knowledge-card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.75rem;
    font-weight: 700;
}
.knowledge-card p {
    color: #4F6A5E;
    margin-bottom: 1.2rem;
}
.read-more {
    color: #2B7A62;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: 0.2s;
}
.read-more i {
    transition: transform 0.2s;
}
.read-more:hover {
    gap: 10px;
    color: #1C5E4A;
}
.read-more:hover i {
    transform: translateX(4px);
}

/* 关于我们 + 团队 */
.about-section {
    padding: 4rem 0;
    background: white;
}
.about-wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
    align-items: center;
    justify-content: space-between;
}
.about-text {
    flex: 1.2;
}
.about-text h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #1C3D32;
}
.about-text p {
    margin-bottom: 1rem;
    color: #355546;
    font-size: 1.05rem;
}
.team-grid {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}
.team-member {
    background: #F9FEF9;
    border-radius: 32px;
    padding: 1.5rem 1rem;
    text-align: center;
    transition: all 0.2s;
    border: 1px solid #E2EFE5;
}
.member-avatar {
    width: 90px;
    height: 90px;
    background: linear-gradient(145deg, #DCF2EA, #C2E3D8);
    border-radius: 50%;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.6rem;
    color: #2B7A62;
}
.team-member h4 {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}
.team-member p {
    font-size: 0.85rem;
    color: #658B7A;
}
.member-contact {
    margin: 0.8rem 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem 1rem;
}
.contact-link {
    color: #2B7A62;
    text-decoration: none;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: 0.2s;
}
.contact-link:hover {
    color: #1C5E4A;
    transform: translateY(-1px);
}
.member-bio {
    font-style: italic;
    color: #699983;
    font-size: 0.8rem;
    display: block;
    margin-top: 0.5rem;
}

/* 加入与订阅 CTA */
.cta-section {
    background: linear-gradient(105deg, #E9F4EE, #FFFFFF);
    padding: 3.5rem 2rem;
    border-radius: 48px;
    margin: 2rem auto 3rem;
    text-align: center;
}
.cta-section h3 {
    font-size: 1.8rem;
    margin-bottom: 0.8rem;
}
.subscribe-form {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}
.subscribe-form input {
    padding: 0.8rem 1.2rem;
    border-radius: 60px;
    border: 1px solid #C2D9CF;
    font-size: 1rem;
    width: 260px;
    outline: none;
    transition: 0.2s;
}
.subscribe-form input:focus {
    border-color: #2B7A62;
    box-shadow: 0 0 0 3px rgba(43,122,98,0.2);
}
.interaction-links {
    margin: 1.5rem 0 0;
}
.social-links {
    margin-top: 2rem;
    display: flex;
    gap: 1.5rem;
    justify-content: center;
}
.social-links a {
    color: #3C6B5A;
    font-size: 1.6rem;
    transition: 0.2s;
}
.social-links a:hover {
    color: #1B5E48;
    transform: translateY(-3px);
}

/* Footer */
footer {
    background: #1F2C26;
    color: #C6DDD2;
    padding: 2.5rem 0 1.8rem;
    margin-top: 2rem;
}
.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}
.footer-copyright {
    font-size: 0.85rem;
}
.footer-links a {
    color: #C6DDD2;
    text-decoration: none;
    margin-left: 1.5rem;
    transition: 0.2s;
    font-size: 0.9rem;
}
.footer-links a:hover {
    color: white;
}

/* 响应式 */
@media (max-width: 800px) {
    .container {
        padding: 0 24px;
    }
    .nav-container {
        flex-direction: column;
    }
    .hero h1 {
        font-size: 2.4rem;
    }
    .hero p {
        font-size: 1.1rem;
    }
    .about-wrap {
        flex-direction: column;
    }
    .cta-section {
        margin: 1rem 1rem 2rem;
        padding: 2rem 1.5rem;
    }
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    .footer-links a {
        margin: 0 0.8rem;
    }
}
@media (max-width: 480px) {
    .nav-links {
        gap: 1.2rem;
        justify-content: center;
    }
    .hero-buttons .btn-primary, .hero-buttons .btn-outline {
        padding: 0.5rem 1.2rem;
    }
    .team-grid {
        grid-template-columns: 1fr;
    }
}

/* 辅助 */
.text-center {
    text-align: center;
}
.mt-2 {
    margin-top: 1rem;
}