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

body {
    font-family: 'Inter', sans-serif;
    background-color: #f8fbfe;
    color: #1f2a3e;
    line-height: 1.5;
    scroll-behavior: smooth;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #dfe3e9;
}
::-webkit-scrollbar-thumb {
    background: #5193c9;
    border-radius: 10px;
}

/* 容器 */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* 导航栏 */
.navbar {
    background: rgba(245, 252, 255, 0.918);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}
.logo {
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #1f3a3b, #4e4d8b);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.logo span {
    font-weight: 400;
    color: #28abe7;
    background: none;
    -webkit-background-clip: unset;
    background-clip: unset;
}
.nav-links {
    display: flex;
    gap: 2.2rem;
    list-style: none;
}
.nav-links a {
    text-decoration: none;
    font-weight: 500;
    color: #2c393e;
    transition: color 0.2s;
    font-size: 1rem;
}
.nav-links a:hover {
    color: #1940ac;
}
/* 移动端菜单简单适配 */
@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }
    .container {
        padding: 0 1.5rem;
    }
    .nav-container {
        padding: 0.8rem 1.5rem;
    }
    .logo {
        font-size: 1.4rem;
    }
}

/* Hero 区域 */
.hero {
    padding: 5rem 0 4rem 0;
    text-align: center;
    background: radial-gradient(ellipse at 70% 30%, #effcff, #f0eafe);
}
.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(to right, #27304a, #4e85b8);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}
.hero .tagline {
    font-size: 1.3rem;
    color: #0b0fe6;
    max-width: 700px;
    margin: 0 auto 1.8rem auto;
    font-weight: 400;
}
.hero .btn {
    display: inline-block;
    background-color: #3a9bc8;
    color: white;
    padding: 0.8rem 2rem;
    border-radius: 40px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.25s ease;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}
.hero .btn:hover {
    background-color: #2a7ea5;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

/* 通用章节样式 */
section {
    padding: 5rem 0;
    border-bottom: 1px solid #f0e7db;
}
.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    position: relative;
    display: inline-block;
    letter-spacing: -0.01em;
}
.section-title:after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 0;
    width: 60px;
    height: 4px;
    background: #5c6fd9;
    border-radius: 4px;
}

/* 团队介绍卡片 / 文字区域 */
.intro-grid {
    display: flex;
    gap: 3rem;
    flex-wrap: wrap;
    align-items: center;
}
.intro-text {
    flex: 2;
    font-size: 1.05rem;
    color: #2c333e;
    line-height: 1.6;
}
.intro-text p {
    margin-bottom: 1.2rem;
}
.intro-stats {
    flex: 1;
    background: #e8edff;
    border-radius: 28px;
    padding: 1.8rem;
    text-align: center;
    box-shadow: 0 12px 24px -12px rgba(0,0,0,0.08);
}
.stat-item {
    margin: 1.2rem 0;
}
.stat-number {
    font-size: 2.4rem;
    font-weight: 800;
    color: #1f0bcc;
}

/* 历史时间轴 (优雅垂直风格) */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 1rem;
}
.timeline-item {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    background: #ffffffc9;
    padding: 1.2rem 1.5rem;
    border-radius: 28px;
    transition: all 0.2s;
    border: 1px solid #d8e9f1;
}
.timeline-year {
    font-size: 1.9rem;
    font-weight: 800;
    min-width: 110px;
    color: #4e70b8;
    letter-spacing: -0.01em;
}
.timeline-content h4 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #2d3e2d;
}
.timeline-content p {
    color: #4a5b4a;
}
@media (max-width: 640px) {
    .timeline-item {
        flex-direction: column;
        gap: 0.5rem;
    }
    .timeline-year {
        font-size: 1.5rem;
    }
}

/* 团队成员网格 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 2rem;
    margin-top: 1rem;
}
.member-card {
    background: white;
    border-radius: 32px;
    padding: 1.8rem 1.2rem 1.5rem 1.2rem;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.02);
    border: 1px solid #dce2f3;
}
.member-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 30px -12px rgba(0, 0, 0, 0.12);
    border-color: #c5bbe2;
}
.member-avatar {
    width: 110px;
    height: 110px;
    background: linear-gradient(145deg, #d4ecf2, #d1c4e9);
    border-radius: 50%;
    margin: 0 auto 1rem auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.6rem;
    font-weight: 600;
    color: #40608b;
    font-family: monospace;
    box-shadow: 0 10px 18px -6px rgba(0,0,0,0.1);
}
.member-name {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
}
.member-role {
    font-size: 0.9rem;
    color: #3a77c8;
    font-weight: 600;
    letter-spacing: 0.3px;
    margin-bottom: 0.8rem;
}
.member-bio {
    font-size: 0.9rem;
    color: #5f6c5a;
    margin-bottom: 1rem;
    padding: 0 0.3rem;
}
.member-social a {
    color: #5c71aa;
    margin: 0 0.5rem;
    font-size: 1.2rem;
    transition: color 0.2s;
}
.member-social a:hover {
    color: #2ca4c9;
}

/* 主要作品网格 */
.works-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
    gap: 2rem;
}
.work-card {
    background: white;
    border-radius: 28px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.04);
    border: 1px solid #efe2d4;
}
.work-card:hover {
    transform: scale(1.01);
    box-shadow: 0 20px 28px -12px rgba(0, 0, 0, 0.15);
}
.work-img {
    height: 190px;
    background-size: cover;
    background-position: center;
    transition: transform 0.4s;
}
.work-card:hover .work-img {
    transform: scale(1.02);
}
.work-info {
    padding: 1.4rem 1.2rem 1.6rem;
}
.work-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
}
.work-desc {
    font-size: 0.9rem;
    color: #68737b;
    margin: 0.6rem 0 1rem;
}
.work-tag {
    display: inline-block;
    background: #e3ecf5;
    padding: 0.2rem 0.8rem;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 600;
    color: #3161a1;
}

/* 页脚 */
footer {
    background: #2a241c;
    color: #cfdde6;
    padding: 2.5rem 0;
    text-align: center;
}
.footer-content {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}
.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}
.footer-links a {
    color: #a6bdcf;
    text-decoration: none;
    transition: color 0.2s;
}
.footer-links a:hover {
    color: #7cb7e7;
}
.copyright {
    font-size: 0.8rem;
    opacity: 0.7;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.4rem;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .intro-grid {
        flex-direction: column;
    }
    .intro-stats {
        width: 100%;
    }
    .team-grid, .works-grid {
        gap: 1.2rem;
    }
}
.back2top {
    position: fixed;
    bottom: 2rem;
    right: 1.5rem;
    background: #5a9ed6;
    color: white;
    width: 44px;
    height: 44px;
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    opacity: 0.7;
    transition: 0.2s;
    z-index: 99;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}
.back2top:hover {
    opacity: 1;
    background: #2c4bb1;
    transform: translateY(-3px);
}