:root {
    --quantum-blue: #2563eb;
    --dark-blue: #1e1b4b;
    --cyan: #22d3ee;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --card-bg: rgba(15, 23, 42, 0.6);
    --border-glow: rgba(34, 211, 238, 0.15);
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Segoe UI", "Helvetica Neue", Arial, "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif !important;
}
html {
    scroll-behavior: smooth;
}
body {
    background: linear-gradient(135deg, #0a0a23, #1e1b4b 55%, #0d1033);
    color: var(--text);
    line-height: 1.7;
    min-height: 100vh;
    background-image: linear-gradient(rgba(34,211,238,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(34,211,238,0.04) 1px, transparent 1px);
    background-size: 34px 34px;
}
a {
    color: var(--cyan);
    text-decoration: none;
    transition: color 0.3s, box-shadow 0.3s;
}
a:hover {
    color: #67e8f9;
}
.container {
    width: 92%;
    max-width: 1400px;
    margin: 0 auto;
}
.navbar {
    background: rgba(10, 10, 35, 0.88);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(34, 211, 238, 0.12);
    padding: 0.85rem 1.6rem;
    position: sticky;
    top: 0;
    z-index: 999;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}
.nav-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.2rem;
    flex-wrap: wrap;
    list-style: none;
}
.nav-links a {
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid transparent;
    transition: all 0.35s;
}
.nav-links a:hover {
    background: rgba(34, 211, 238, 0.1);
    color: var(--cyan);
    border-color: rgba(34, 211, 238, 0.3);
    box-shadow: 0 0 16px rgba(34, 211, 238, 0.15);
}
.hero {
    position: relative;
    padding: 5.5rem 0 4rem;
    text-align: center;
    overflow: hidden;
}
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(37, 99, 235, 0.25), transparent 70%);
    pointer-events: none;
}
.hero h1 {
    font-size: clamp(1.8rem, 4.5vw, 3.2rem);
    font-weight: 800;
    color: #fff;
    letter-spacing: 0.5px;
    text-shadow: 0 0 40px rgba(34, 211, 238, 0.3);
    position: relative;
    margin-bottom: 1rem;
}
.hero .subtitle {
    font-size: 1.1rem;
    color: rgba(226, 232, 240, 0.75);
    position: relative;
    max-width: 800px;
    margin: 0 auto 2rem;
}
.hero .btn-group {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    position: relative;
}
.hero .btn {
    padding: 0.8rem 2rem;
    border-radius: 40px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.35s;
}
.hero .btn-primary {
    background: linear-gradient(135deg, var(--quantum-blue), #1d4ed8);
    color: #fff;
    box-shadow: 0 4px 24px rgba(37, 99, 235, 0.4);
}
.hero .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(37, 99, 235, 0.55);
}
.hero .btn-outline {
    background: rgba(34, 211, 238, 0.08);
    color: var(--cyan);
    border: 1px solid rgba(34, 211, 238, 0.35);
}
.hero .btn-outline:hover {
    background: rgba(34, 211, 238, 0.18);
    box-shadow: 0 0 24px rgba(34, 211, 238, 0.2);
}
.hero .hero-img {
    position: relative;
    margin-top: 2.5rem;
    max-width: 920px;
    margin-left: auto;
    margin-right: auto;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(34, 211, 238, 0.12);
    box-shadow: 0 0 60px rgba(37, 99, 235, 0.18);
}
.hero .hero-img img {
    width: 100%;
    display: block;
    object-fit: cover;
}
.section {
    padding: 4rem 0;
}
.section-alt {
    background: rgba(10, 10, 35, 0.42);
    border-top: 1px solid rgba(34, 211, 238, 0.07);
    border-bottom: 1px solid rgba(34, 211, 238, 0.07);
}
.section-header {
    text-align: center;
    margin-bottom: 2.8rem;
}
.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    position: relative;
    display: inline-block;
}
.section-header h2::after {
    content: "";
    display: block;
    height: 3px;
    width: 60px;
    margin: 0.5rem auto 0;
    background: linear-gradient(90deg, var(--quantum-blue), var(--cyan));
    border-radius: 4px;
}
.section-header p {
    color: var(--muted);
    margin-top: 0.75rem;
    font-size: 1rem;
}
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-glow);
    border-radius: 16px;
    backdrop-filter: blur(8px);
    padding: 1.8rem;
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}
.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--cyan), transparent);
    opacity: 0.3;
}
.card:hover {
    border-color: rgba(34, 211, 238, 0.4);
    box-shadow: 0 0 30px rgba(37, 99, 235, 0.12), 0 4px 24px rgba(0, 0, 0, 0.2);
    transform: translateY(-4px);
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}
.stats-item {
    text-align: center;
    padding: 2rem 1rem;
}
.stats-number {
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--cyan), var(--quantum-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}
.stats-label {
    color: var(--muted);
    margin-top: 0.5rem;
    font-size: 0.95rem;
}
.adv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.8rem;
    margin-top: 1rem;
}
.adv-card {
    padding: 2rem 1.6rem;
}
.adv-icon {
    font-size: 2.4rem;
    margin-bottom: 1rem;
    display: block;
}
.adv-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.6rem;
    color: #fff;
}
.adv-card p {
    color: var(--muted);
    font-size: 0.92rem;
}
.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.8rem;
}
.event-card {
    padding: 0;
    overflow: hidden;
}
.event-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
}
.event-body {
    padding: 1.4rem;
}
.event-body h3 {
    color: #fff;
    font-size: 1.1rem;
    margin-bottom: 0.4rem;
}
.event-body p {
    color: var(--muted);
    font-size: 0.9rem;
}
.event-link {
    display: inline-block;
    margin-top: 0.8rem;
    font-weight: 600;
    font-size: 0.9rem;
}
.news-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.8rem;
}
.news-card {
    padding: 1.6rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}
.news-meta {
    display: flex;
    gap: 0.8rem;
    align-items: center;
    font-size: 0.8rem;
}
.news-tag a {
    background: rgba(34, 211, 238, 0.14);
    color: var(--cyan);
    padding: 0.2rem 0.7rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid rgba(34, 211, 238, 0.2);
}
.news-tag a:hover {
    background: rgba(34, 211, 238, 0.25);
}
.news-date {
    color: var(--muted);
    font-size: 0.8rem;
}
.news-title {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.5;
}
.news-title a {
    color: #fff;
}
.news-title a:hover {
    color: var(--cyan);
}
.news-excerpt {
    color: var(--muted);
    font-size: 0.88rem;
    flex: 1;
}
.news-link {
    font-size: 0.85rem;
    font-weight: 600;
}
.faq-list {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    gap: 1.4rem;
}
.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border-glow);
    border-radius: 14px;
    padding: 1.4rem 1.6rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}
.faq-item:hover {
    border-color: rgba(34, 211, 238, 0.3);
    box-shadow: 0 0 16px rgba(34, 211, 238, 0.07);
}
.faq-item h3 {
    font-size: 1.05rem;
    color: #fff;
    margin-bottom: 0.6rem;
    cursor: pointer;
    position: relative;
    padding-right: 1.4rem;
}
.faq-item h3::after {
    content: "▾";
    position: absolute;
    right: 0;
    top: 0;
    color: var(--cyan);
}
.faq-item p {
    color: var(--muted);
    font-size: 0.92rem;
}
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.6rem;
}
.testi-card {
    padding: 1.8rem;
}
.testi-card .quote {
    color: var(--muted);
    font-style: italic;
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}
.testi-card .author {
    color: #fff;
    font-weight: 600;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.testi-card .author span {
    color: var(--cyan);
}
.download-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    align-items: center;
}
.download-info h2 {
    font-size: 2rem;
    color: #fff;
    margin-bottom: 1rem;
}
.download-info p {
    color: var(--muted);
    margin-bottom: 1.5rem;
    max-width: 460px;
}
.download-btn {
    display: inline-block;
    padding: 0.9rem 2.2rem;
    border-radius: 40px;
    background: linear-gradient(135deg, var(--quantum-blue), #1e40af);
    color: #fff;
    font-weight: 600;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.38);
    transition: all 0.35s;
}
.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(37, 99, 235, 0.5);
}
.download-img {
    text-align: center;
}
.download-img img {
    max-width: 340px;
    width: 100%;
    border-radius: 18px;
    border: 1px solid rgba(34, 211, 238, 0.15);
    box-shadow: 0 0 40px rgba(37, 99, 235, 0.15);
}
.partners-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.2rem;
}
.partner-item {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(34, 211, 238, 0.1);
    border-radius: 12px;
    padding: 0.8rem 1.6rem;
    color: rgba(226, 232, 240, 0.7);
    font-weight: 500;
    font-size: 1rem;
}
.partner-item:hover {
    color: var(--cyan);
    border-color: rgba(34, 211, 238, 0.35);
}
.footer {
    background: rgba(5, 5, 20, 0.9);
    border-top: 1px solid rgba(34, 211, 238, 0.1);
    padding: 2.5rem 1.5rem 1.5rem;
    text-align: center;
    width: 100%;
    box-sizing: border-box;
}
.footer .footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}
.footer .footer-links a {
    color: rgba(226, 232, 240, 0.7);
    font-size: 0.9rem;
}
.footer .footer-links a:hover {
    color: var(--cyan);
}
.footer .footer-info {
    color: rgba(148, 163, 184, 0.7);
    font-size: 0.85rem;
    line-height: 1.8;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 3.5rem;
    box-sizing: border-box;
}
.footer .footer-info p {
    margin: 0.4rem 0;
}
.footer .copyright {
    margin-top: 1.2rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    color: rgba(148, 163, 184, 0.5);
    font-size: 0.82rem;
    width: 100%;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}
@media (max-width: 768px) {
    .nav-links {
        gap: 0.4rem;
    }
    .nav-links a {
        font-size: 0.82rem;
        padding: 0.4rem 0.65rem;
    }
    .hero h1 {
        font-size: 1.5rem;
    }
    .section-header h2 {
        font-size: 1.5rem;
    }
    .footer-info {
        width: 100%;
        padding: 0 1rem;
    }
}