/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: #0d1b2a;
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* 数字流动背景 */
#digital-rain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 5;
    opacity: 0.1;
    pointer-events: none;
}

/* 导航栏 */
.navbar {
    background: transparent;
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    transition: all 0.3s ease;
    z-index: 10;
}

.navbar-logo {
    width: 180px;
    height: auto;
    transition: transform 0.3s ease;
}

.navbar-logo:hover {
    transform: scale(1.05);
}

.nav-link {
    color: #00d4ff !important;
    font-size: 1.1rem;
    margin: 0 1rem;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #ff5a00 !important;
}

/* 英雄区 */
.hero-section {
    position: relative;
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(45deg, #0d1b2a, #1b263b, #00d4ff);
    animation: gradientShift 15s ease infinite;
    overflow: hidden;
    z-index: 1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 10;
    padding: 2rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.7);
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: #e0e0e0;
    margin-bottom: 2rem;
}

.btn-hero {
    padding: 0.8rem 2rem;
    font-size: 1.1rem;
    background: #ff5a00;
    border: none;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.btn-hero:hover {
    background: #00d4ff;
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.5);
}

/* 功能区 */
.features-section {
    padding: 5rem 0;
    background: #1b263b;
    z-index: 10;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #00d4ff;
    text-align: center;
    text-shadow: 0 0 5px rgba(0, 212, 255, 0.3);
}

.feature-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 20px rgba(0, 212, 255, 0.3);
}

.feature-card h3 {
    font-size: 1.8rem;
    color: #ff5a00;
    margin-bottom: 1rem;
}

.feature-card p {
    color: #e0e0e0;
}

/* 案例区 */
.case-study-section {
    padding: 5rem 0;
    background: #0d1b2a;
    z-index: 10;
}

.case-img {
    width: 100%;
    max-height: 300px;
    object-fit: cover;
    border-radius: 15px;
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.2);
}

.case-content {
    padding: 2rem;
}

.case-content h3 {
    font-size: 1.8rem;
    color: #ff5a00;
    margin-bottom: 1rem;
}

.case-content p {
    color: #e0e0e0;
    margin-bottom: 1.5rem;
}

.case-highlights {
    list-style: none;
    padding: 0;
    margin-bottom: 1.5rem;
}

.case-highlights li {
    color: #b0b0b0;
    margin-bottom: 0.5rem;
}

.case-highlights li strong {
    color: #00d4ff;
}

.btn-outline-light {
    border-color: #00d4ff;
    color: #00d4ff;
    transition: all 0.3s ease;
}

.btn-outline-light:hover {
    background: #00d4ff;
    color: #0d1b2a;
}

/* CTA 区 */
.cta-section {
    padding: 5rem 0;
    background: #1b263b;
    z-index: 10;
}

.cta-title {
    font-size: 2rem;
    color: #00d4ff;
    margin-bottom: 1rem;
}

.cta-description {
    font-size: 1.2rem;
    color: #b0b0b0;
    margin-bottom: 2rem;
}

.btn-cta {
    padding: 1rem 3rem;
    font-size: 1.2rem;
    background: #ff5a00;
    border: none;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.btn-cta:hover {
    background: #00d4ff;
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.5);
}

/* 页脚 */
.footer {
    padding: 3rem 0;
    background: #0d1b2a;
    color: #e0e0e0;
    z-index: 10;
}

.footer h5 {
    color: #00d4ff;
    margin-bottom: 1rem;
}

.footer-link, .social-link {
    color: #e0e0e0;
    transition: color 0.3s ease;
}

.footer-link:hover, .social-link:hover {
    color: #ff5a00;
}

.footer hr {
    border-color: #00d4ff;
    opacity: 0.3;
}

/* 动画 */
@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero-section {
    background-size: 200% 200%;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1.2rem; }
    .navbar-logo { width: 120px; }
    .feature-card { padding: 1.5rem; }
    .feature-card h3 { font-size: 1.5rem; }
    .case-img { margin-bottom: 1.5rem; }
}