/*
 * 广西百色北航科技有限公司 — 导航科技视觉系统
 * 设计：卫星轨道、交通路线、实时数据可视化
 */

:root {
    --primary: #0052cc;             /* 导航蓝 */
    --primary-dark: #003a93;
    --secondary: #ff5722;           /* 定位橙 */
    --accent: #00bfa5;              /* 信号绿 */
    --accent-light: #63ffd0;
    --bg-space: #0a1929;            /* 太空蓝黑 */
    --bg-space-alt: #031326;
    --bg-panel: rgba(6, 17, 34, 0.85);
    --bg-panel-strong: rgba(6, 14, 28, 0.95);
    --bg-map: #e3f2fd;
    --route-line: #2196f3;
    --text-main: #e8f1ff;
    --text-soft: rgba(232, 241, 255, 0.75);
    --text-muted: rgba(232, 241, 255, 0.55);
    --border-glow: rgba(255, 255, 255, 0.12);
    --border-quiet: rgba(255, 255, 255, 0.06);
    --shadow-deep: 0 25px 65px rgba(2, 8, 20, 0.55);
    --shadow-soft: 0 15px 45px rgba(4, 11, 22, 0.45);
    --radius-sm: 12px;
    --radius-md: 18px;
    --radius-lg: 28px;
    --spacing-xs: 0.45rem;
    --spacing-sm: 0.9rem;
    --spacing-md: 1.8rem;
    --spacing-lg: 3.2rem;
    --spacing-xl: 4.8rem;
    --font-cn: 'HarmonyOS Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-code: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    --transition: 0.35s cubic-bezier(.4, 0, .2, 1);
}

*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-cn);
    background: radial-gradient(circle at 15% 20%, rgba(0, 191, 165, 0.2), transparent 40%),
                radial-gradient(circle at 80% 10%, rgba(255, 87, 34, 0.18), transparent 50%),
                var(--bg-space);
    color: var(--text-main);
    min-height: 100vh;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    position: relative;
}

body::before,
body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -1;
}

body::before {
    background-image: radial-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px);
    background-size: 120px 120px;
    opacity: 0.25;
}

body::after {
    background-image: url('../images/tech_05.png');
    background-repeat: no-repeat;
    background-position: top right;
    background-size: 820px;
    opacity: 0.08;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    width: 100%;
    display: block;
    border-radius: var(--radius-sm);
}

.text-muted {
    color: var(--text-muted);
}

main {
    padding-top: 92px;
}

.container {
    width: min(1200px, calc(100% - 3rem));
    margin: 0 auto;
}

.section {
    padding: var(--spacing-xl) 0;
}

.section-heading {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-heading span {
    text-transform: uppercase;
    letter-spacing: 0.35em;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.section-heading h2 {
    font-size: clamp(2rem, 4vw, 2.8rem);
    margin: var(--spacing-xs) 0;
}

.section-heading p {
    color: var(--text-soft);
    max-width: 660px;
    margin: 0.5rem auto 0;
}

/* Header */
.satellite-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 999;
    background: rgba(4, 10, 22, 0.85);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.satellite-header.is-scrolled {
    background: rgba(2, 6, 16, 0.95);
}

.nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.2rem;
    padding: 1rem 0;
}

.brand {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    font-weight: 600;
    line-height: 1.2;
    color: #fff;
}

.brand-text {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    font-size: 0.85rem;
    letter-spacing: 0.02em;
    text-transform: none;
}

.brand-text strong {
    font-size: 1.1rem;
    letter-spacing: 0.04em;
}

.brand-text small {
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.4em;
    color: var(--text-muted);
}

.menu-toggle {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.25);
    background: transparent;
    color: #fff;
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    transition: var(--transition);
}

.menu-toggle span {
    width: 18px;
    height: 2px;
    background: #fff;
    display: block;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    flex-direction: column;
    font-weight: 600;
    font-size: 0.95rem;
    letter-spacing: 0.05em;
    padding: 0.3rem 0.5rem;
}

.nav-item.active > .nav-link::after,
.nav-item:hover > .nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -0.3rem;
    height: 2px;
    background: linear-gradient(90deg, var(--secondary), var(--accent));
}

.has-dropdown .dropdown-panel {
    position: absolute;
    top: calc(100% + 20px);
    left: 0;
    background: rgba(4, 10, 24, 0.95);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-glow);
    box-shadow: var(--shadow-soft);
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: var(--transition);
}

.has-dropdown:hover .dropdown-panel,
.has-dropdown:focus-within .dropdown-panel {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.dropdown-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(160px, 1fr));
    gap: 0.4rem;
    padding: 1.2rem;
}

.dropdown-link {
    padding: 0.65rem 0.9rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-soft);
    font-size: 0.9rem;
    transition: var(--transition);
}

.dropdown-link span {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.dropdown-link:hover,
.dropdown-link.active {
    border-color: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.btn, .btn-outline, .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.9rem 1.8rem;
    border-radius: 999px;
    border: 1px solid transparent;
    font-weight: 600;
    letter-spacing: 0.1em;
    transition: var(--transition);
    cursor: pointer;
}

.btn {
    background: linear-gradient(120deg, var(--primary), var(--accent));
    color: #fff;
    box-shadow: 0 18px 40px rgba(0, 82, 204, 0.35);
}

.btn-outline {
    border-color: rgba(255, 255, 255, 0.35);
    color: var(--text-main);
}

.btn-ghost {
    border-color: rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-soft);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent-light);
}

.grid {
    display: grid;
    gap: var(--spacing-md);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.glass-panel,
.info-card,
.module,
.stat-panel,
.news-card,
.job-card,
.contact-card,
.legal-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.module h3,
.info-card h3,
.stat-panel .label {
    margin-bottom: 0.45rem;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.2rem;
}

.stat-panel {
    text-align: center;
}

.stat-panel .value {
    font-size: 2.4rem;
    font-family: var(--font-code);
}

.list-check,
.key-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.6rem;
}

.list-check li,
.key-list li {
    padding: 0.55rem 0.8rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-quiet);
    background: rgba(0, 82, 204, 0.08);
}

.tag-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.tag-grid span {
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    border: 1px solid var(--border-glow);
    color: var(--accent-light);
    font-size: 0.85rem;
}

.page-hero {
    padding: calc(var(--spacing-xl) + 1.5rem) 0 var(--spacing-lg);
    background: linear-gradient(135deg, rgba(0, 26, 56, 0.9), rgba(2, 8, 18, 0.95));
    position: relative;
    overflow: hidden;
}

.page-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 75% 20%, rgba(0, 191, 165, 0.35), transparent 50%);
    pointer-events: none;
}

.page-hero .container {
    position: relative;
    z-index: 2;
}

.hero-split {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    align-items: center;
}

.hero-meta {
    display: flex;
    gap: 1.2rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.hero-meta span {
    font-family: var(--font-code);
    font-size: 0.9rem;
    color: var(--accent-light);
}

.breadcrumbs {
    font-size: 0.95rem;
    color: var(--text-soft);
    margin-bottom: 1rem;
}

/* Timeline */
.timeline,
.orbital-timeline {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 1rem;
}

.timeline li,
.orbital-timeline li {
    padding: 1.2rem 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-glow);
    background: var(--bg-panel-strong);
    position: relative;
}

.timeline strong,
.orbital-timeline strong {
    font-family: var(--font-code);
    color: var(--accent-light);
    letter-spacing: 0.2em;
}

/* Case */
.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.case-card,
.case-tile {
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-glow);
    background: rgba(2, 10, 22, 0.8);
    overflow: hidden;
}

.case-card img,
.case-tile img {
    width: 100%;
    height: 210px;
    object-fit: cover;
    border-radius: 0;
}

.case-content,
.case-tile .content {
    padding: 1.5rem;
}

.case-tag {
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--accent-light);
}

.case-detail {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.case-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
}

.case-metrics .metric-value {
    font-size: 1.6rem;
    font-family: var(--font-code);
}

/* News */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.news-card time {
    font-family: var(--font-code);
    color: var(--accent-light);
    letter-spacing: 0.2em;
}

/* Partner */
.partner-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.2rem;
    justify-items: center;
}

.partner-logo {
    width: 120px;
    opacity: 0.8;
    transition: var(--transition);
}

.partner-logo:hover {
    opacity: 1;
}

/* Careers */
.job-card h3 {
    margin-bottom: 0.5rem;
}

.job-card .meta {
    font-size: 0.9rem;
    color: var(--text-soft);
    margin-bottom: 1rem;
}

.job-card ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.4rem;
    color: var(--text-muted);
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.2rem;
}

#contactForm {
    display: grid;
    gap: 1rem;
}

#contactForm input,
#contactForm textarea {
    width: 100%;
    padding: 0.9rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(5, 15, 30, 0.8);
    color: #fff;
}

#contactForm textarea {
    min-height: 140px;
    resize: vertical;
}

/* Footer */
.footer {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    background: rgba(2, 6, 16, 0.95);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.footer h4 {
    margin-bottom: 0.6rem;
}

.footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.5rem;
    color: var(--text-soft);
}

.footer-bottom {
    margin-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 1rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-bottom a {
    color: var(--accent-light);
}

/* Responsive */
@media (max-width: 1080px) {
    .nav-menu {
        position: fixed;
        top: 82px;
        right: 1.5rem;
        flex-direction: column;
        background: rgba(3, 10, 24, 0.98);
        padding: 1.2rem;
        border-radius: var(--radius-md);
        border: 1px solid rgba(255, 255, 255, 0.08);
        transform: scale(0.9);
        transform-origin: top right;
        opacity: 0;
        pointer-events: none;
    }

    .nav-menu.open {
        opacity: 1;
        transform: scale(1);
        pointer-events: auto;
    }

    .menu-toggle {
        display: inline-flex;
    }

    .dropdown-panel {
        position: static;
        opacity: 1 !important;
        pointer-events: auto !important;
        transform: none !important;
        background: transparent;
        border: none;
        box-shadow: none;
        padding: 0;
    }

    .dropdown-grid {
        grid-template-columns: minmax(180px, 1fr);
        padding: 0.5rem 0 0 0;
    }
}

@media (max-width: 600px) {
    .hero-split {
        text-align: left;
    }
}