/* Master Stylesheet for "信号连接" 未来通信风 */
@import url('variables.css');

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
    background-color: var(--color-dark);
}

body {
    font-family: var(--font-family-main);
    color: var(--color-text-light);
    line-height: 1.8;
    background-image: radial-gradient(circle at 20% 20%, rgba(123, 44, 191, 0.15), transparent 40%), radial-gradient(circle at 80% 0%, rgba(0, 168, 232, 0.25), transparent 35%), var(--gradient-deep);
    min-height: 100vh;
    position: relative;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
    color: #fff;
    opacity: 0.85;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    width: min(96%, var(--max-width));
    margin: 0 auto;
}

.section {
    padding: calc(var(--spacing-xxl) + 40px) 0;
    position: relative;
}

.section + .section {
    border-top: 1px solid rgba(255, 255, 255, 0.04);
}

.section-title {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-h2);
    margin-bottom: var(--spacing-md);
    color: #fff;
    letter-spacing: 0.08em;
}

.section-desc {
    max-width: 680px;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-muted);
}

.glassy-panel {
    background: var(--color-panel);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xxl);
    position: relative;
    overflow: hidden;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-pill);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    background: rgba(0, 168, 232, 0.12);
    border: 1px solid rgba(0, 245, 212, 0.35);
}

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

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

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.rounded-lg { border-radius: var(--border-radius-lg); }
.shadow-md { box-shadow: var(--shadow-md); }

.text-center { text-align: center; }
.text-right { text-align: right; }

/* -------------------- Header & Navigation -------------------- */
.header {
    position: fixed;
    inset: 0 0 auto 0;
    height: var(--header-height);
    background: rgba(0, 6, 38, 0.8);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    z-index: 1000;
}

.navbar {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    flex-wrap: nowrap;
}

.logo {
    font-family: var(--font-family-heading);
    color: #fff;
    font-size: 1.35rem;
    letter-spacing: 0.06em;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

.logo span {
    color: var(--color-accent);
    font-size: 0.58em;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    flex: 1;
    justify-content: flex-end;
    flex-wrap: nowrap;
    white-space: nowrap;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--color-text-light);
    font-weight: 500;
    letter-spacing: 0.03em;
    font-size: 0.95rem;
    padding: var(--spacing-sm) 0;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.nav-link::after {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.2s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

.dropdown-menu {
    position: absolute;
    top: 110%;
    left: 0;
    min-width: 200px;
    background: rgba(4, 12, 44, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-sm) 0;
    list-style: none;
    box-shadow: var(--shadow-md);
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
    transition: all 0.2s ease;
    font-size: 0.95rem;
}

.nav-item:hover > .dropdown-menu {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}

.dropdown-item a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--color-text-light);
}

.menu-toggle {
    display: none;
    font-size: 1.8rem;
    color: #fff;
}

/* -------------------- Hero -------------------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: var(--header-height);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top, rgba(0, 168, 232, 0.25), transparent 50%);
    pointer-events: none;
}

.matrix-canvas {
    position: absolute;
    inset: 0;
    z-index: 0;
    opacity: 0.4;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 650px;
}

.hero h1 {
    font-size: clamp(2.8rem, 6vw, 4.5rem);
    color: #fff;
    margin-bottom: var(--spacing-lg);
}

.hero p {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-pill);
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.btn-primary {
    background: linear-gradient(120deg, var(--color-primary), var(--color-secondary));
    color: #fff;
    box-shadow: var(--shadow-glow);
}

.btn-outline {
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: #fff;
    background: transparent;
}

.btn-ghost {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
}

.btn:hover {
    transform: translateY(-3px);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: var(--spacing-lg);
}

.hero-stat {
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 10, 40, 0.6);
}

.hero-stat h3 {
    font-size: 2rem;
    color: var(--color-accent);
}

.signal-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
}

.highlight-card {
    background: rgba(2, 12, 48, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    height: 100%;
}

.highlight-card h3 { color: #fff; }

.highlight-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.check-list {
    list-style: none;
    padding-left: 0;
    display: grid;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
}

.check-list li i { color: var(--color-accent); margin-right: 6px; }

.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    align-items: center;
}

.value-board {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--spacing-lg);
    background: rgba(0, 6, 38, 0.8);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.value-metric h3 {
    color: #fff;
    font-size: 1.8rem;
    margin-bottom: var(--spacing-xs);
}

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

/* -------------------- Cards & Components -------------------- */
.neon-card {
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(3, 8, 40, 0.8);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.neon-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 245, 212, 0.1), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.neon-card:hover::before { opacity: 1; }

.neon-card h3 {
    color: #fff;
    margin-bottom: var(--spacing-sm);
}

.label-text {
    font-size: 0.82rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-text-muted);
}

.hex-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-xl);
}

.hex-tile {
    background: rgba(0, 21, 68, 0.9);
    border: 1px solid rgba(0, 245, 212, 0.15);
    padding: var(--spacing-xl);
    border-radius: 24px;
    clip-path: polygon(50% 0%, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%);
    text-align: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.hex-tile:hover {
    transform: translateY(-6px);
    border-color: var(--color-accent);
}

.hex-icon {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.signal-map {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(0, 168, 232, 0.3);
}

.signal-map img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.signal-map::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 4, 40, 0), rgba(0, 168, 232, 0.2));
}

.map-points {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.map-point {
    position: absolute;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--color-accent);
    box-shadow: 0 0 20px rgba(0, 245, 212, 0.7);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.8); opacity: 0.8; }
    50% { transform: scale(1.2); opacity: 1; }
    100% { transform: scale(0.8); opacity: 0.8; }
}

.timeline {
    position: relative;
    padding-left: 40px;
    border-left: 2px dashed rgba(255, 255, 255, 0.2);
}

.timeline-item {
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.timeline-item::before {
    content: attr(data-year);
    position: absolute;
    left: -120px;
    top: 0;
    font-weight: 600;
    color: var(--color-accent);
}

.timeline-dot {
    position: absolute;
    left: -48px;
    top: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-secondary);
    border: 2px solid var(--color-accent);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.case-meta {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.article-body img {
    border-radius: var(--border-radius-lg);
    width: 100%;
    margin-bottom: var(--spacing-lg);
}

.news-navigation {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.news-navigation a {
    color: var(--color-accent);
}

.news-card {
    padding: var(--spacing-xl);
    background: rgba(1, 10, 40, 0.9);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: transform 0.3s ease;
}

.news-card:hover { transform: translateY(-6px); }

.news-card h4 {
    margin-bottom: var(--spacing-sm);
    color: #fff;
}

.news-meta {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-xl);
}

.solution-card {
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    background: rgba(2, 12, 48, 0.85);
    border: 1px solid rgba(0, 168, 232, 0.25);
    position: relative;
    overflow: hidden;
}

.solution-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(125deg, transparent, rgba(0, 168, 232, 0.18));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.solution-card:hover::after { opacity: 1; }

.solution-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.8rem;
    margin-right: 8px;
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.case-card {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 9, 36, 0.9);
}

.case-card img { height: 220px; object-fit: cover; width: 100%; }

.case-card-content {
    padding: var(--spacing-lg);
}

.case-meta {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.partner-marquee {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--spacing-lg);
    align-items: center;
}

.partner-marquee img {
    max-height: 50px;
    filter: brightness(0) invert(1);
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.partner-marquee img:hover {
    opacity: 1;
}

.job-card,
.contact-card,
.data-card {
    background: rgba(1, 10, 40, 0.85);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.07);
    padding: var(--spacing-xl);
}

.job-card h3 { color: #fff; }

.job-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.contact-form label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-muted);
}

.contact-form input,
.contact-form textarea,
.contact-form select {
    width: 100%;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(0, 9, 36, 0.8);
    color: #fff;
    font-family: var(--font-family-main);
    margin-bottom: var(--spacing-lg);
}

.contact-form textarea { min-height: 160px; resize: vertical; }

/* -------------------- Sidebar Layout -------------------- */
.subpage-layout {
    padding-top: calc(var(--header-height) + 30px);
}

.subpage-grid {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--spacing-xxl);
}

.sidebar-menu {
    list-style: none;
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(1, 12, 42, 0.95);
    overflow: hidden;
}

.sidebar-menu-title {
    padding: var(--spacing-lg);
    background: rgba(0, 168, 232, 0.15);
    color: #fff;
    font-weight: 600;
    letter-spacing: 0.2em;
}

.sidebar-menu li a {
    display: flex;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--color-text-light);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-menu li:last-child a { border-bottom: none; }

.sidebar-menu li a.active {
    background: rgba(0, 168, 232, 0.12);
    color: #fff;
    border-left: 3px solid var(--color-accent);
}

.main-content h1 {
    color: #fff;
    margin-bottom: var(--spacing-md);
}

.breadcrumb {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

.breadcrumb a { color: var(--color-accent); }

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-xl);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-xl);
}

.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.data-table th,
.data-table td {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--spacing-md);
    text-align: left;
}

.data-table th { color: var(--color-accent); }

.image-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-md);
}

.image-gallery img {
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

/* -------------------- Footer -------------------- */
.footer {
    background: rgba(0, 4, 28, 0.95);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer h4 {
    color: #fff;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.footer p,
.footer li,
.footer a {
    color: var(--color-text-muted);
}

.footer-bottom {
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

/* -------------------- Responsive -------------------- */
@media (max-width: 1100px) {
    .nav-menu { display: none; }
    .menu-toggle { display: block; }
    .nav-menu.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        right: 0;
        width: 90%;
        background: rgba(0, 4, 28, 0.95);
        padding: var(--spacing-xl);
        border-radius: var(--border-radius-lg);
    }
    .subpage-grid { grid-template-columns: 1fr; }
    .timeline { padding-left: 20px; }
    .timeline-item::before { left: 0; top: -28px; }
    .timeline-dot { left: -32px; }
}

@media (max-width: 640px) {
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero h1 { font-size: 2.4rem; }
    .section { padding: var(--spacing-xxl) 0; }
}