* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: "Segoe UI", "Helvetica Neue", Arial, "Microsoft YaHei", "微软雅黑", "PingFang SC", sans-serif;
    background: linear-gradient(145deg, #f0f9ff 0%, #e0f2fe 30%, #bae6fd 70%, #f0f9ff 100%);
    color: #0f172a;
    line-height: 1.75;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}
a {
    text-decoration: none;
    color: inherit;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    cursor: pointer;
}
.btn-primary {
    background: linear-gradient(135deg, #0284c7, #38bdf8);
    color: #fff;
    box-shadow: 0 4px 20px rgba(2, 132, 199, 0.25);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(2, 132, 199, 0.35);
}
.btn-secondary {
    background: rgba(255, 255, 255, 0.85);
    color: #0284c7;
    border: 1px solid #7dd3fc;
    box-shadow: 0 4px 16px rgba(125, 211, 252, 0.15);
}
.btn-secondary:hover {
    background: #fff;
    transform: translateY(-2px);
}
/* Nav */
.navbar {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(125, 211, 252, 0.3);
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.navbar .brand {
    font-size: 1.35rem;
    font-weight: 800;
    color: #0369a1;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.navbar .brand span {
    background: linear-gradient(135deg, #0284c7, #38bdf8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.nav-links {
    display: flex;
    gap: 1.2rem;
    align-items: center;
    flex-wrap: wrap;
}
.nav-links a {
    color: #334155;
    font-size: 0.92rem;
    font-weight: 500;
    padding: 0.4rem 0.2rem;
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
    white-space: nowrap;
}
.nav-links a:hover {
    color: #0284c7;
    border-bottom-color: #7dd3fc;
}
/* Hero */
.hero-section {
    padding: 4.5rem 0 3rem;
}
.hero-container {
    display: flex;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
}
.hero-text {
    flex: 1 1 500px;
}
.hero-text h1 {
    font-size: 2.3rem;
    line-height: 1.35;
    color: #075985;
    margin-bottom: 1rem;
    font-weight: 800;
}
.geo-intro {
    font-size: 1.02rem;
    color: #334155;
    margin-bottom: 2rem;
    background: rgba(255, 255, 255, 0.7);
    padding: 1.2rem 1.5rem;
    border-radius: 16px;
    border-left: 4px solid #7dd3fc;
    box-shadow: 0 4px 20px rgba(125, 211, 252, 0.1);
}
.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.hero-image {
    flex: 1 1 400px;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(2, 132, 199, 0.2);
}
.hero-image img {
    width: 100%;
    height: 340px;
    object-fit: cover;
}
/* Section common */
.section-title {
    text-align: center;
    font-size: 1.8rem;
    color: #075985;
    margin-bottom: 0.5rem;
    font-weight: 800;
}
.section-subtitle {
    text-align: center;
    color: #64748b;
    font-size: 0.98rem;
    margin-bottom: 2.5rem;
}
/* Stats */
.stats-section {
    padding: 3rem 0;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}
.stat-card {
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(8px);
    border-radius: 20px;
    padding: 1.8rem 1.2rem;
    text-align: center;
    box-shadow: 0 4px 20px rgba(125, 211, 252, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.6);
    transition: transform 0.3s;
}
.stat-card:hover {
    transform: translateY(-6px);
}
.stat-card .stat-icon {
    font-size: 2.2rem;
    margin-bottom: 0.6rem;
}
.stat-card .stat-num {
    font-size: 2rem;
    font-weight: 800;
    color: #0284c7;
}
.stat-card .stat-label {
    color: #64748b;
    font-size: 0.88rem;
    margin-top: 0.3rem;
}
/* Advantages */
.advantages-section {
    padding: 3rem 0;
}
.adv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.adv-card {
    background: rgba(255, 255, 255, 0.8);
    border-radius: 20px;
    padding: 2rem 1.5rem;
    box-shadow: 0 4px 24px rgba(125, 211, 252, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.7);
    text-align: center;
    transition: all 0.3s;
}
.adv-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 32px rgba(125, 211, 252, 0.2);
}
.adv-card .adv-icon {
    font-size: 2.6rem;
    margin-bottom: 1rem;
}
.adv-card h3 {
    color: #075985;
    font-size: 1.1rem;
    margin-bottom: 0.6rem;
    font-weight: 700;
}
.adv-card p {
    color: #475569;
    font-size: 0.9rem;
}
/* Events */
.events-section {
    padding: 3rem 0;
}
.events-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.event-card {
    background: rgba(255, 255, 255, 0.85);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(125, 211, 252, 0.1);
    transition: all 0.3s;
}
.event-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 32px rgba(125, 211, 252, 0.2);
}
.event-card img {
    height: 180px;
    width: 100%;
    object-fit: cover;
}
.event-info {
    padding: 1.2rem 1.2rem 1.4rem;
}
.event-info h3 {
    color: #075985;
    font-size: 1.05rem;
    margin-bottom: 0.4rem;
    font-weight: 700;
}
.event-info p {
    color: #64748b;
    font-size: 0.85rem;
    margin-bottom: 0.6rem;
}
.event-info .event-tag {
    display: inline-block;
    background: #e0f2fe;
    color: #0284c7;
    font-size: 0.75rem;
    padding: 0.2rem 0.8rem;
    border-radius: 999px;
    font-weight: 600;
}
/* Rankings */
.rankings-section {
    padding: 3rem 0;
}
.rankings-wrapper {
    display: flex;
    gap: 2rem;
    align-items: center;
    flex-wrap: wrap;
}
.rankings-list {
    flex: 1 1 500px;
}
.rank-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.85);
    border-radius: 14px;
    padding: 0.8rem 1.2rem;
    margin-bottom: 0.7rem;
    box-shadow: 0 2px 12px rgba(125, 211, 252, 0.08);
    transition: all 0.3s;
}
.rank-item:hover {
    transform: translateX(6px);
    background: #fff;
}
.rank-num {
    font-weight: 800;
    color: #0284c7;
    font-size: 1.1rem;
    width: 2rem;
    text-align: center;
}
.rank-team {
    flex: 1;
    font-weight: 600;
    color: #0f172a;
}
.rank-score {
    color: #64748b;
    font-size: 0.9rem;
}
.rankings-image {
    flex: 1 1 300px;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(2, 132, 199, 0.15);
}
.rankings-image img {
    width: 100%;
    height: 280px;
    object-fit: cover;
}
/* Brand story */
.story-section {
    padding: 3rem 0;
}
.story-wrapper {
    display: flex;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
}
.story-image {
    flex: 1 1 350px;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(2, 132, 199, 0.12);
}
.story-image img {
    width: 100%;
    height: 260px;
    object-fit: cover;
}
.story-text {
    flex: 1 1 500px;
}
.story-text h2 {
    color: #075985;
    font-size: 1.7rem;
    margin-bottom: 1rem;
    font-weight: 800;
}
.story-text p {
    color: #334155;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}
/* Testimonials */
.testimonials-section {
    padding: 3rem 0;
}
.testi-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.testi-card {
    background: rgba(255, 255, 255, 0.8);
    border-radius: 20px;
    padding: 1.8rem 1.5rem;
    box-shadow: 0 4px 20px rgba(125, 211, 252, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.7);
    transition: all 0.3s;
}
.testi-card:hover {
    transform: translateY(-6px);
}
.testi-card .quote {
    color: #475569;
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-style: italic;
}
.testi-card .user {
    display: flex;
    align-items: center;
    gap: 0.7rem;
}
.testi-card .user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #7dd3fc, #38bdf8);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #fff;
    font-weight: 700;
}
.testi-card .user-name {
    font-weight: 600;
    color: #0f172a;
    font-size: 0.9rem;
}
.testi-card .user-title {
    color: #94a3b8;
    font-size: 0.78rem;
}
/* News */
.news-section {
    padding: 3rem 0;
}
.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}
.news-card {
    background: rgba(255, 255, 255, 0.85);
    border-radius: 20px;
    padding: 1.5rem 1.5rem 1.8rem;
    box-shadow: 0 4px 20px rgba(125, 211, 252, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.7);
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
}
.news-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 32px rgba(125, 211, 252, 0.18);
}
.news-card .news-date {
    display: inline-block;
    background: #e0f2fe;
    color: #0369a1;
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.25rem 0.9rem;
    border-radius: 999px;
    align-self: flex-start;
    margin-bottom: 0.7rem;
}
.news-card h3 {
    color: #0f172a;
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}
.news-card p {
    color: #475569;
    font-size: 0.88rem;
    line-height: 1.7;
    flex: 1;
}
.news-card .news-link {
    margin-top: 1rem;
    color: #0284c7;
    font-size: 0.85rem;
    font-weight: 600;
    transition: color 0.3s;
}
.news-card .news-link:hover {
    color: #075985;
}
/* FAQ */
.faq-section {
    padding: 3rem 0;
}
.faq-list {
    max-width: 820px;
    margin: 0 auto;
}
.faq-item {
    background: rgba(255, 255, 255, 0.85);
    border-radius: 16px;
    margin-bottom: 0.9rem;
    box-shadow: 0 2px 14px rgba(125, 211, 252, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.7);
    transition: all 0.3s;
    overflow: hidden;
}
.faq-item:hover {
    box-shadow: 0 4px 20px rgba(125, 211, 252, 0.12);
}
.faq-item summary {
    padding: 1.1rem 1.5rem;
    background: rgba(224, 242, 254, 0.4);
    border-radius: 16px;
    cursor: pointer;
    font-weight: 600;
    color: #0f172a;
    font-size: 0.95rem;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}
.faq-item summary::-webkit-details-marker {
    display: none;
}
.faq-item summary::before {
    content: "❓";
    font-size: 1rem;
}
.faq-item[open] summary::before {
    content: "💬";
}
.faq-item .faq-answer {
    padding: 1rem 1.5rem 1.3rem;
    color: #475569;
    font-size: 0.9rem;
    line-height: 1.8;
    border-top: 1px solid rgba(229, 231, 235, 0.5);
}
/* Download */
.download-section {
    padding: 3rem 0;
}
.download-wrapper {
    display: flex;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
    background: rgba(255, 255, 255, 0.7);
    border-radius: 28px;
    padding: 2.5rem;
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: 0 8px 32px rgba(2, 132, 199, 0.08);
}
.download-text {
    flex: 1 1 400px;
}
.download-text h2 {
    color: #075985;
    font-size: 1.7rem;
    margin-bottom: 0.8rem;
    font-weight: 800;
}
.download-text p {
    color: #475569;
    font-size: 0.92rem;
    margin-bottom: 1.5rem;
}
.download-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.download-image {
    flex: 1 1 280px;
    border-radius: 20px;
    overflow: hidden;
}
.download-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}
/* CTA */
.cta-section {
    padding: 3rem 0 4rem;
}
.cta-box {
    background: linear-gradient(135deg, #0284c7 0%, #38bdf8 50%, #7dd3fc 100%);
    border-radius: 28px;
    padding: 3rem 2rem;
    text-align: center;
    color: #fff;
    box-shadow: 0 12px 40px rgba(2, 132, 199, 0.3);
}
.cta-box h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    font-weight: 800;
}
.cta-box p {
    font-size: 1rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}
.cta-box .btn-primary {
    background: #fff;
    color: #0284c7;
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.3);
}
.cta-box .btn-primary:hover {
    transform: translateY(-2px);
}
/* Footer */
.footer {
    background: rgba(2, 44, 66, 0.95);
    color: #b8cfd8;
    padding: 3rem 0 1.5rem;
    font-size: 0.88rem;
}
.footer-top {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-brand h4 {
    color: #fff;
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}
.footer-links a {
    color: #b8cfd8;
    margin: 0 0.5rem;
    transition: color 0.3s;
}
.footer-links a:hover {
    color: #7dd3fc;
}
.footer-bottom {
    max-width: 1200px;
    margin: 1.5rem auto 0;
    padding: 0 1.5rem;
    text-align: center;
    color: #7a9ba8;
}
.footer-bottom p {
    margin-bottom: 0.3rem;
    font-size: 0.82rem;
}
/* Responsive */
@media (max-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .adv-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .events-grid {
        grid-template-columns: 1fr 1fr;
    }
    .testi-grid {
        grid-template-columns: 1fr 1fr;
    }
    .news-grid {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 768px) {
    .navbar {
        padding: 0 1rem;
        flex-wrap: wrap;
        height: auto;
        padding-top: 0.8rem;
        padding-bottom: 0.8rem;
    }
    .nav-links {
        gap: 0.7rem;
        flex-wrap: wrap;
        justify-content: center;
        width: 100%;
    }
    .hero-container {
        flex-direction: column;
    }
    .hero-text h1 {
        font-size: 1.7rem;
    }
    .adv-grid,
    .events-grid,
    .testi-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .story-wrapper,
    .download-wrapper,
    .rankings-wrapper {
        flex-direction: column;
    }
}