:root {
  --primary: #0d6efd;
  --primary-dark: #081633;
  --secondary: #0f172a;
  --accent: #4cc9f0;
  --text: #1f2937;
  --muted: #667085;
  --bg: #f5f8fc;
  --white: #ffffff;
  --line: rgba(15, 23, 42, 0.08);
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.12);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(13, 110, 253, 0.08), transparent 28%),
    linear-gradient(180deg, #f8fbff 0%, #f5f8fc 100%);
}

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

.site-header {
  background: rgba(7, 18, 46, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 24px rgba(2, 12, 27, 0.16);
}

.navbar {
  padding: 0.95rem 0;
}

.navbar-brand {
  text-decoration: none;
}

.brand-logo-img {
  width: 256px;
  height: 48px;
  object-fit: contain;
  display: block;
}

.brand-logo {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--white);
  background: linear-gradient(135deg, #0d6efd, #3fb7ff);
  box-shadow: 0 8px 20px rgba(13, 110, 253, 0.35);
}

.brand-text-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--white);
}

.brand-subtitle {
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.68);
}

.navbar-dark .navbar-nav .nav-link {
  color: rgba(255, 255, 255, 0.82);
  font-weight: 500;
  margin-left: 0.4rem;
  margin-right: 0.4rem;
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .nav-link:focus {
  color: var(--white);
}

.nav-cta {
  padding: 0.58rem 1rem !important;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.page-section {
  padding: 78px 0;
}

.section-banner {
  padding-top: 34px;
}

.section-alt {
  background: rgba(255, 255, 255, 0.52);
  border-top: 1px solid rgba(255, 255, 255, 0.65);
  border-bottom: 1px solid rgba(15, 23, 42, 0.04);
}

.section-heading {
  max-width: 780px;
  margin: 0 auto 42px;
}

.section-tag {
  display: inline-block;
  margin-bottom: 12px;
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--primary);
  background: rgba(13, 110, 253, 0.1);
}

.section-heading h2 {
  margin-bottom: 14px;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--secondary);
}

.section-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.custom-carousel {
  overflow: hidden;
  border-radius: 28px;
}

.carousel-hero {
  position: relative;
  min-height: 500px;
  display: flex;
  align-items: center;
  padding: 60px 76px;
  color: var(--white);
}

.carousel-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.24), transparent 28%),
    radial-gradient(circle at bottom left, rgba(255, 255, 255, 0.16), transparent 30%);
  pointer-events: none;
}

.slide-theme-1 {
  background:
    linear-gradient(135deg, rgba(7, 12, 31, 0.68), rgba(10, 88, 202, 0.18)),
    linear-gradient(120deg, #07122e 0%, #0b2f73 42%, #0d6efd 100%);
}

.slide-theme-2 {
  background:
    linear-gradient(135deg, rgba(8, 22, 54, 0.72), rgba(16, 185, 129, 0.2)),
    linear-gradient(120deg, #081636 0%, #0a58ca 45%, #0f766e 100%);
}

.slide-theme-3 {
  background:
    linear-gradient(135deg, rgba(37, 9, 68, 0.7), rgba(13, 110, 253, 0.18)),
    linear-gradient(120deg, #250944 0%, #3b1d78 42%, #0d6efd 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.hero-content-narrow {
  max-width: 940px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  margin-bottom: 18px;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.22);
  backdrop-filter: blur(8px);
}

.hero-content h1,
.hero-content h2 {
  margin-bottom: 16px;
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: 0.02em;
}

.hero-content p {
  margin: 0;
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.9);
}

.carousel-indicators {
  margin-bottom: 1.2rem;
}

.carousel-indicators [data-bs-target] {
  width: 34px;
  height: 4px;
  border-radius: 999px;
}

.carousel-control-prev,
.carousel-control-next {
  width: 8%;
}

.content-panel,
.solution-card,
.info-card,
.contact-item {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.content-panel,
.solution-card {
  padding: 34px;
}

.info-card,
.contact-item {
  padding: 28px;
}

.text-block h3,
.info-card h3 {
  margin-bottom: 14px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--secondary);
}

.text-block p,
.info-card p,
.contact-item p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.8;
}

.visual-card {
  position: relative;
  min-height: 260px;
  display: flex;
  align-items: end;
  padding: 28px;
  border-radius: 22px;
  overflow: hidden;
  color: var(--white);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.visual-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0));
}

.visual-card > div {
  position: relative;
  z-index: 1;
}

.visual-card strong {
  display: block;
  font-size: 1.28rem;
  font-weight: 700;
}

.visual-label {
  display: inline-block;
  margin-bottom: 10px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.visual-large {
  min-height: 340px;
}

.image-product {
  background:
    linear-gradient(135deg, rgba(6, 14, 40, 0.38), rgba(13, 110, 253, 0.16)),
    linear-gradient(120deg, #0a2342 0%, #104e8b 52%, #2c7be5 100%);
}

.image-wireless {
  background:
    linear-gradient(135deg, rgba(4, 27, 44, 0.35), rgba(35, 166, 213, 0.18)),
    linear-gradient(120deg, #062a3b 0%, #0d6d8a 48%, #29a7c6 100%);
}

.image-data {
  background:
    linear-gradient(135deg, rgba(28, 16, 57, 0.35), rgba(13, 110, 253, 0.18)),
    linear-gradient(120deg, #24103a 0%, #4b2c7a 48%, #2d79f3 100%);
}

.image-clients {
  background:
    linear-gradient(135deg, rgba(7, 19, 45, 0.42), rgba(31, 111, 235, 0.18)),
    linear-gradient(120deg, #071a39 0%, #12478d 48%, #0d6efd 100%);
}

.section-contact {
  padding-bottom: 92px;
}

.contact-panel {
  padding: 30px;
}

.contact-item {
  height: 100%;
}

.contact-label {
  display: block;
  margin-bottom: 12px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.contact-item a {
  color: var(--secondary);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 600;
}

.contact-item a:hover {
  color: var(--primary);
}

.site-footer {
  padding: 28px 0;
  color: rgba(255, 255, 255, 0.78);
  background: linear-gradient(180deg, #09162f 0%, #07122a 100%);
}

.site-footer p {
  margin-bottom: 6px;
}

.footer-note {
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.58);
}

@media (max-width: 992px) {
  .carousel-hero {
    min-height: 400px;
    padding: 42px 48px;
  }

  .hero-content h1,
  .hero-content h2 {
    font-size: 2.3rem;
  }

  .page-section {
    padding: 64px 0;
  }
}

@media (max-width: 768px) {
  .brand-name {
    font-size: 1.05rem;
  }

  .section-heading h2 {
    font-size: 1.8rem;
  }

  .carousel-hero {
    min-height: 270px;
    padding: 28px 24px 44px;
  }

  .hero-badge {
    margin-bottom: 12px;
    padding: 6px 12px;
    font-size: 0.72rem;
  }

  .hero-content h1,
  .hero-content h2 {
    font-size: 1.45rem;
    margin-bottom: 10px;
  }

  .hero-content p {
    font-size: 0.92rem;
  }

  .content-panel,
  .solution-card,
  .info-card,
  .contact-item,
  .contact-panel {
    padding: 22px;
  }

  .visual-card,
  .visual-large {
    min-height: 220px;
  }
}