/* 全局样式 */
:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --text-dark: #2d3748;
    --text-light: #718096;
    --bg-light: #f7fafc;
    --white: #ffffff;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 15px 50px rgba(0, 0, 0, 0.15);
    --gradient: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
                 "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: all 0.3s ease;
}

/* 首页横幅 */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    background: var(--gradient);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    color: var(--white);
    padding: 0 20px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    font-weight: 300;
}

.description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-button {
    display: inline-block;
    padding: 15px 40px;
    background: var(--white);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

/* 动画效果 */
.fade-in {
    animation: fadeInUp 1s ease-out;
}

.fade-in-delay-1 {
    animation: fadeInUp 1s ease-out 0.2s both;
}

.fade-in-delay-2 {
    animation: fadeInUp 1s ease-out 0.4s both;
}

.fade-in-delay-3 {
    animation: fadeInUp 1s ease-out 0.6s both;
}

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

/* 通用区块样式 */
section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--gradient);
    border-radius: 2px;
}

/* 关于我们 */
.about {
    background: var(--bg-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1;
    background: var(--gradient);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.image-placeholder svg {
    width: 150px;
    height: 150px;
    color: var(--white);
}

/* 核心优势 */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.advantage-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    text-align: center;
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon svg {
    width: 40px;
    height: 40px;
    color: var(--white);
}

.advantage-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.advantage-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* 投资亮点 */
.investment {
    background: var(--bg-light);
}

.investment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.investment-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.investment-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.investment-card .card-icon {
    width: 70px;
    height: 70px;
    margin: 0 0 1.5rem 0;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.investment-card .card-icon svg {
    width: 35px;
    height: 35px;
    color: var(--white);
}

.investment-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
    line-height: 1.5;
}

.investment-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.investment-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    margin-bottom: 1rem;
    color: var(--text-light);
    line-height: 1.6;
}

.investment-list li:last-child {
    margin-bottom: 0;
}

.list-icon {
    color: var(--primary-color);
    font-size: 1.2rem;
    font-weight: bold;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

/* 创始团队 */
.team {
    background: var(--bg-light);
}

.team-content {
    max-width: 1200px;
    margin: 0 auto;
}

.team-description {
    font-size: 1.1rem;
    line-height: 2;
    color: var(--text-light);
    text-align: justify;
    margin-bottom: 4rem;
    padding: 2rem;
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.team-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.team-highlight-item {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    text-align: center;
}

.team-highlight-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.highlight-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1.5rem;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.highlight-icon svg {
    width: 30px;
    height: 30px;
    color: var(--white);
}

.team-highlight-item h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.team-highlight-item p {
    color: var(--text-light);
    line-height: 1.6;
}

/* 联系我们 */
.contact {
    background: var(--bg-light);
}

.contact-content {
    max-width: 1200px;
    margin: 0 auto;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    flex: 0 1 350px;
}

.contact-item svg {
    width: 40px;
    height: 40px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact-item h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.contact-item p {
    color: var(--text-light);
}

.contact-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.contact-item a:hover {
    opacity: 0.8;
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 3rem 0;
    text-align: center;
}

.footer-content {
    opacity: 0.8;
}

.footer-info p {
    margin-bottom: 0.5rem;
}

.icp {
    font-size: 0.9rem;
    opacity: 0.6;
}

.icp a {
    color: inherit;
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.icp a:hover {
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1.2rem;
    }

    .description {
        font-size: 1rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .investment-grid {
        grid-template-columns: 1fr;
    }

    .team-highlights {
        grid-template-columns: 1fr;
    }

    .team-description {
        font-size: 1rem;
        padding: 1.5rem;
        text-align: left;
    }

    .contact-info {
        flex-direction: column;
        gap: 2rem;
    }

    .contact-item {
        flex: 1 1 100%;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .advantage-card {
        padding: 1.5rem;
    }

    .investment-card {
        padding: 1.5rem;
    }

    .investment-card h3 {
        font-size: 1.1rem;
    }

    section {
        padding: 60px 0;
    }
}