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

body {
    font-family: 'Inter', sans-serif;
    background-color: #050b1a;
    color: #eef5ff;
    scroll-behavior: smooth;
    line-height: 1.5;
}

.bg-tech {
    background: radial-gradient(circle at 10% 20%, rgba(10, 25, 55, 0.9), #030712);
    position: relative;
}

::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #0f172a;
}
::-webkit-scrollbar-thumb {
    background: #2c3e66;
    border-radius: 10px;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 32px;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    flex-wrap: wrap;
    border-bottom: 1px solid rgba(56, 189, 248, 0.2);
    backdrop-filter: blur(2px);
}
.logo h1 {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, #c0e0ff, #3b82f6);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: 1px;
}
.logo p {
    font-size: 12px;
    color: #7e8b9e;
    letter-spacing: 2px;
}
.nav-links {
    display: flex;
    gap: 40px;
    list-style: none;
}
.nav-links li {
    cursor: pointer;
    font-weight: 500;
    font-size: 18px;
    transition: 0.3s;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
    color: #cbd5e6;
}
.nav-links li:hover, .nav-links li.active {
    color: #3b82f6;
    border-bottom-color: #3b82f6;
}
@media (max-width: 800px) {
    .navbar {
        flex-direction: column;
        gap: 16px;
    }
    .nav-links {
        gap: 28px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .container {
        padding: 0 20px;
    }
}

.page {
    display: none;
    animation: fadeIn 0.5s ease forwards;
}
.active-page {
    display: block;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px);}
    to { opacity: 1; transform: translateY(0);}
}

.hero {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 60px 0 40px;
    gap: 40px;
}
.hero-content {
    flex: 1;
}
.hero-badge {
    background: rgba(59,130,246,0.2);
    display: inline-block;
    padding: 6px 16px;
    border-radius: 40px;
    font-size: 14px;
    font-weight: 500;
    color: #60a5fa;
    margin-bottom: 20px;
    backdrop-filter: blur(4px);
}
.hero-content h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    background: linear-gradient(to right, #ffffff, #90caf9);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-content p {
    font-size: 18px;
    color: #b9c7db;
    margin-bottom: 32px;
    max-width: 90%;
}
.btn-group {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}
.btn-primary {
    background: linear-gradient(95deg, #2563eb, #1e40af);
    border: none;
    padding: 12px 32px;
    border-radius: 40px;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: 0.3s;
    box-shadow: 0 4px 14px rgba(37,99,235,0.3);
}
.btn-primary:hover {
    transform: translateY(-3px);
    background: linear-gradient(95deg, #3b82f6, #2563eb);
    box-shadow: 0 10px 25px -5px rgba(59,130,246,0.5);
}
.btn-outline {
    background: transparent;
    border: 1px solid #3b82f6;
    padding: 12px 32px;
    border-radius: 40px;
    font-weight: 500;
    color: #cbd5e6;
    cursor: pointer;
    transition: 0.3s;
}
.btn-outline:hover {
    background: rgba(59,130,246,0.1);
    border-color: #60a5fa;
    color: white;
}
.hero-image {
    flex: 1;
    text-align: center;
}
.hero-image img {
    max-width: 100%;
    border-radius: 32px;
    box-shadow: 0 25px 40px -12px rgba(0,0,0,0.5);
    border: 1px solid rgba(59,130,246,0.3);
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}
.section-title:after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 0;
    width: 70px;
    height: 3px;
    background: #3b82f6;
    border-radius: 4px;
}
.section-sub {
    color: #94a3b8;
    margin-bottom: 48px;
    font-size: 18px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin: 40px 0;
}
.service-card {
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(8px);
    border-radius: 28px;
    padding: 32px 24px;
    transition: 0.25s ease;
    border: 1px solid rgba(59,130,246,0.2);
}
.service-card:hover {
    transform: translateY(-6px);
    border-color: #3b82f6;
    box-shadow: 0 20px 30px -12px rgba(0,0,0,0.5);
    background: rgba(20, 30, 55, 0.8);
}
.service-icon {
    font-size: 48px;
    color: #3b82f6;
    margin-bottom: 24px;
}
.service-card h3 {
    font-size: 24px;
    margin-bottom: 16px;
}
.service-card p {
    color: #b9c7db;
    line-height: 1.5;
}

/* 合作伙伴样式 */
.partner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 28px;
    margin: 40px 0 30px;
}
.partner-card {
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    border-radius: 28px;
    padding: 20px 12px;
    text-align: center;
    transition: all 0.2s;
    border: 1px solid rgba(59,130,246,0.25);
    cursor: default;
}
.partner-card:hover {
    transform: translateY(-5px);
    border-color: #3b82f6;
    background: rgba(25, 35, 60, 0.8);
}
.partner-icon {
    font-size: 38px;
    color: #60a5fa;
    margin-bottom: 12px;
}
.partner-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: #e2edff;
}
.slogan-banner {
    background: linear-gradient(105deg, rgba(37,99,235,0.2) 0%, rgba(6,20,45,0.8) 100%);
    border-left: 4px solid #3b82f6;
    border-radius: 32px;
    padding: 18px 32px;
    margin: 30px 0 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: space-between;
}
.slogan-banner i {
    font-size: 40px;
    color: #3b82f6;
}
.slogan-text {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: 1px;
}
.slogan-sub {
    color: #94a3b8;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 40px;
    margin: 40px 0 60px;
}
.case-item {
    background: #0f172a;
    border-radius: 28px;
    overflow: hidden;
    transition: all 0.3s;
    border: 1px solid rgba(59,130,246,0.3);
    backdrop-filter: blur(2px);
}
.case-item:hover {
    transform: scale(1.02);
    border-color: #3b82f6;
    box-shadow: 0 20px 30px -10px rgba(0,0,0,0.5);
}
.case-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
    transition: 0.4s;
}
.case-content {
    padding: 24px;
}
.case-content h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: #f0f6ff;
}
.case-tags {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}
.case-tag {
    background: rgba(59,130,246,0.2);
    padding: 4px 12px;
    border-radius: 30px;
    font-size: 12px;
    color: #90caf9;
}
.case-desc {
    color: #cbd5e6;
    line-height: 1.5;
    margin-bottom: 16px;
}
.case-location {
    font-size: 14px;
    color: #60a5fa;
    display: flex;
    align-items: center;
    gap: 6px;
}

.about-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 48px;
    align-items: center;
    margin: 40px 0;
}
.about-text {
    flex: 1.2;
}
.about-text p {
    margin-bottom: 20px;
    color: #cbd5e6;
    font-size: 17px;
    line-height: 1.6;
}
.about-stats {
    display: flex;
    gap: 32px;
    margin-top: 32px;
    flex-wrap: wrap;
}
.stat {
    background: #0f172a;
    padding: 20px;
    border-radius: 24px;
    text-align: center;
    min-width: 120px;
    border: 1px solid #2d3a5e;
}
.stat-number {
    font-size: 36px;
    font-weight: 800;
    color: #3b82f6;
}
.about-img {
    flex: 0.9;
}
.about-img img {
    width: 100%;
    border-radius: 32px;
    box-shadow: 0 20px 30px -12px black;
}

.contact-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 48px;
    margin: 40px 0;
}
.contact-info {
    flex: 1;
    background: #0f172a;
    padding: 32px;
    border-radius: 32px;
}
.contact-detail {
    margin: 24px 0;
    display: flex;
    align-items: center;
    gap: 20px;
}
.contact-detail i {
    font-size: 28px;
    color: #3b82f6;
}
.map-placeholder {
    flex: 1;
    background: #0a0f1f;
    border-radius: 32px;
    overflow: hidden;
    min-height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: url('https://picsum.photos/id/104/800/600');
    background-size: cover;
    background-position: center;
    position: relative;
}
.map-overlay {
    background: rgba(0,0,0,0.6);
    width: 100%;
    text-align: center;
    padding: 20px;
}

footer {
    margin-top: 80px;
    border-top: 1px solid rgba(59,130,246,0.2);
    padding: 40px 0 24px;
    text-align: center;
    color: #8ca3c0;
}

@media (max-width: 700px) {
    .hero-content h1 { font-size: 36px; }
    .section-title { font-size: 28px; }
    .cases-grid { grid-template-columns: 1fr; }
    .partner-grid { grid-template-columns: repeat(2,1fr); }
}