:root {
    --deep-sea-blue: #002171;
    --warning-orange: #FF5722;
    --deck-gray: #CFD8DC;
    --foam-white: #FFFFFF;
    --dark-bg: #00154d;
    --text-muted: #b0bec5;
}

body {
    background-color: var(--deep-sea-blue);
    color: var(--foam-white);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    overflow-x: hidden;
}

.radar-font {
    font-family: 'JetBrains Mono', 'Courier New', Courier, monospace;
}

.navbar {
    background-color: rgba(0, 33, 113, 0.95);
    border-bottom: 2px solid var(--warning-orange);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--foam-white) !important;
}

.nav-link {
    color: var(--foam-white) !important;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
    margin: 0 10px;
    transition: color 0.3s;
}

.nav-link:hover, .nav-link.active {
    color: var(--warning-orange) !important;
}

.hero-section {
    padding: 160px 0 100px;
    background: radial-gradient(circle at center, #003399 0%, #002171 100%);
    position: relative;
    overflow: hidden;
}

.industrial-card {
    background: rgba(255, 255, 255, 0.05);
    border-left: 4px solid var(--warning-orange);
    padding: 2rem;
    transition: transform 0.3s;
    height: 100%;
}

.industrial-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
}

.tech-spec-table {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.tech-spec-table th {
    background: var(--warning-orange);
    color: white;
}

.footer {
    background: #001035;
    padding: 50px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-warning-custom {
    background-color: var(--warning-orange);
    color: white;
    border: none;
    padding: 12px 30px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-warning-custom:hover {
    background-color: #e64a19;
    color: white;
}

/* 流體動效背景模擬 */
.flow-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
    pointer-events: none;
}

.section-title {
    border-bottom: 1px solid var(--warning-orange);
    display: inline-block;
    padding-bottom: 10px;
    margin-bottom: 30px;
    text-transform: uppercase;
    letter-spacing: 2px;
}