:root {
  --bg: #eef3fb;
  --surface: #ffffff;
  --surface-soft: #f7f9fc;
  --ink: #183153;
  --muted: #667892;
  --line: #d7e1ef;
  --brand: #0d4eb3;
  --brand-deep: #0a2f72;
  --accent: #f59e0b;
  --success: #12b981;
  --shadow: 0 18px 45px rgba(17, 44, 88, 0.12);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Outfit", "Noto Sans SC", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(13, 78, 179, 0.08), transparent 32%),
    linear-gradient(180deg, #f6f9ff 0%, #edf3fb 100%);
  color: var(--ink);
}

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

button,
input,
textarea {
  font: inherit;
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  background: var(--brand-deep);
  color: #e6eefc;
  font-size: 14px;
}

.topbar-inner,
.header-inner,
.hero-inner,
.topbar-contact,
.panel-head,
.contact-layout,
.section-heading.split {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.topbar-contact a {
  color: #fff;
  font-weight: 700;
}

.header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(215, 225, 239, 0.8);
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: linear-gradient(145deg, #111827, #3f2a19);
  color: #fff;
  font-size: 32px;
  font-weight: 800;
  box-shadow: var(--shadow);
}

.brand strong {
  display: block;
  color: var(--brand);
  font-size: 20px;
}

.brand span {
  color: var(--muted);
  font-size: 13px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav a {
  font-weight: 500;
}

.nav a:hover {
  color: var(--brand);
}

.lang-switch,
.button {
  border: 0;
  border-radius: 999px;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.lang-switch {
  padding: 12px 18px;
  background: #edf4ff;
  color: var(--brand);
  font-weight: 700;
  cursor: pointer;
}

.lang-switch:hover,
.button:hover {
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
  border: 0;
  background: transparent;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--ink);
}

.hero {
  padding: 46px 0 72px;
  background:
    linear-gradient(135deg, rgba(10, 47, 114, 0.97), rgba(13, 78, 179, 0.86)),
    radial-gradient(circle at right center, rgba(98, 178, 255, 0.35), transparent 30%);
  color: #fff;
  overflow: hidden;
}

.hero-copy {
  max-width: 500px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1,
.section-heading h2,
.panel-head h3,
.product-detail h3 {
  margin: 0;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.02;
}

.hero-text {
  margin: 18px 0 26px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 18px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 24px;
  cursor: pointer;
  font-weight: 700;
}

.button.primary {
  background: #fff;
  color: var(--brand-deep);
}

.button.ghost {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-visual {
  position: relative;
  min-height: 380px;
  flex: 1;
}

.visual-grid {
  position: absolute;
  inset: auto -40px -120px 80px;
  height: 220px;
  border-radius: 50%;
  border: 1px solid rgba(129, 185, 255, 0.25);
  box-shadow: inset 0 0 0 1px rgba(129, 185, 255, 0.1);
}

.speaker,
.control-rack {
  position: absolute;
  background: linear-gradient(180deg, #23314a, #0d1627);
  box-shadow: 0 24px 50px rgba(0, 0, 0, 0.34);
}

.speaker::after,
.control-rack::after {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.speaker.tall {
  right: 34px;
  bottom: 20px;
  width: 110px;
  height: 280px;
  border-radius: 16px;
}

.speaker.medium {
  right: 190px;
  bottom: 86px;
  width: 90px;
  height: 220px;
  border-radius: 18px;
}

.speaker.wedge {
  left: 120px;
  bottom: 30px;
  width: 160px;
  height: 120px;
  border-radius: 22px;
  transform: skew(-12deg);
}

.control-rack {
  right: 110px;
  bottom: 46px;
  width: 210px;
  height: 90px;
  border-radius: 18px;
}

.overview,
.solutions,
.cases,
.faq {
  padding: 72px 0;
}

.section-heading h2,
.panel-head h3,
.product-detail h3 {
  font-size: clamp(30px, 4vw, 46px);
  color: var(--brand-deep);
}

.section-note {
  max-width: 420px;
  color: var(--muted);
  line-height: 1.7;
}

.overview-grid,
.feature-grid,
.news-grid,
.case-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.overview-card,
.feature-card,
.news-card,
.case-card,
.sidebar-card,
.product-cards-panel,
.product-detail,
.contact-form {
  background: var(--surface);
  border: 1px solid rgba(215, 225, 239, 0.9);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.overview-card,
.feature-card,
.news-card,
.case-card {
  padding: 28px;
}

.overview-card h3,
.feature-card h3,
.news-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

.overview-card p,
.feature-card p,
.news-card p,
.case-card p,
.faq-item p,
.product-copy p,
.contact-copy p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.product-hub {
  padding: 84px 0;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 16px 0 28px;
  color: var(--muted);
  font-size: 14px;
}

.breadcrumb span + span::before {
  content: "/";
  margin-right: 10px;
}

.product-layout {
  display: grid;
  grid-template-columns: 290px minmax(0, 1fr);
  gap: 24px;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.sidebar-card {
  padding: 28px;
  background: linear-gradient(160deg, #0d4eb3, #143e90);
  color: #fff;
}

.sidebar-card h3 {
  margin: 0 0 8px;
  font-size: 34px;
}

.catalogue {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.category-block {
  overflow: hidden;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow);
}

.category-button,
.series-button,
.product-mini {
  width: 100%;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.category-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 22px;
  color: var(--brand-deep);
  font-weight: 700;
}

.category-button.active {
  background: linear-gradient(135deg, #0d4eb3, #143e90);
  color: #fff;
}

.series-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.series-item + .series-item {
  border-top: 1px solid var(--line);
}

.series-button {
  padding: 16px 20px 12px;
  color: var(--ink);
  font-weight: 600;
}

.series-button.active {
  color: var(--brand);
}

.mini-products {
  padding: 0 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.product-mini {
  padding: 10px 12px;
  border-radius: 14px;
  color: var(--muted);
}

.product-mini.active,
.product-mini:hover {
  background: #edf4ff;
  color: var(--brand);
}

.product-main {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.product-cards-panel,
.product-detail {
  padding: 28px;
}

.series-tag {
  padding: 10px 14px;
  border-radius: 999px;
  background: #edf4ff;
  color: var(--brand);
  font-weight: 700;
}

.product-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.product-card {
  border-radius: 24px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #fff, #f6f9ff);
  padding: 22px;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.product-card:hover,
.product-card.active {
  transform: translateY(-3px);
  border-color: #9dc1ff;
  box-shadow: 0 18px 32px rgba(20, 62, 144, 0.16);
}

.product-figure,
.detail-figure {
  position: relative;
  border-radius: 22px;
  overflow: hidden;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.45), transparent 34%),
    linear-gradient(160deg, var(--product-color), color-mix(in srgb, var(--product-color), #08162d 28%));
}

.product-figure {
  height: 260px;
}

.detail-figure {
  min-height: 360px;
}

.speaker-art {
  position: absolute;
  inset: auto auto 26px 50%;
  transform: translateX(-50%);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.24), rgba(0, 0, 0, 0.2));
  box-shadow: 0 30px 40px rgba(0, 0, 0, 0.2);
}

.speaker-art::before,
.speaker-art::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 50%;
  background: rgba(13, 22, 39, 0.7);
}

.speaker-art.tower {
  width: 78px;
  height: 170px;
  border-radius: 26px;
}

.speaker-art.tower::before {
  top: 26px;
  width: 38px;
  height: 38px;
}

.speaker-art.tower::after {
  bottom: 24px;
  width: 46px;
  height: 46px;
}

.speaker-art.box {
  width: 118px;
  height: 146px;
  border-radius: 28px;
}

.speaker-art.box::before {
  top: 26px;
  width: 50px;
  height: 50px;
}

.speaker-art.box::after {
  bottom: 22px;
  width: 64px;
  height: 64px;
}

.speaker-art.column {
  width: 68px;
  height: 184px;
  border-radius: 20px;
}

.speaker-art.column::before {
  top: 18px;
  width: 30px;
  height: 30px;
  box-shadow: 0 42px 0 rgba(13, 22, 39, 0.7), 0 84px 0 rgba(13, 22, 39, 0.7);
}

.speaker-art.column::after {
  display: none;
}

.speaker-art.pendant {
  width: 108px;
  height: 132px;
  border-radius: 42% 42% 36% 36%;
}

.speaker-art.pendant::before {
  top: 28px;
  width: 44px;
  height: 44px;
}

.speaker-art.pendant::after {
  bottom: 20px;
  width: 56px;
  height: 56px;
}

.product-card h4,
.product-copy h3 {
  margin: 16px 0 10px;
  font-size: 28px;
}

.product-card p,
.product-card strong {
  display: block;
}

.product-card p {
  color: var(--muted);
  line-height: 1.65;
}

.product-card strong {
  margin-top: 12px;
  color: var(--brand);
}

.product-detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 24px;
}

.product-copy {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.meta-chip {
  padding: 10px 14px;
  border-radius: 999px;
  background: #edf4ff;
  color: var(--brand);
  font-weight: 700;
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.spec-card {
  padding: 16px;
  border-radius: 18px;
  background: var(--surface-soft);
  border: 1px solid var(--line);
}

.spec-card span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 8px;
}

.spec-card strong {
  font-size: 18px;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.related-button {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}

.related-button:hover {
  border-color: #9dc1ff;
  color: var(--brand);
}

.news-band {
  padding: 80px 0;
  background: linear-gradient(180deg, rgba(13, 78, 179, 0.07), rgba(13, 78, 179, 0.02));
}

.news-card span {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--brand);
  font-weight: 700;
}

.faq-list {
  display: grid;
  gap: 16px;
}

.faq-item {
  padding: 24px 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.faq-item h3 {
  margin: 0 0 10px;
  font-size: 20px;
}

.contact {
  padding: 84px 0 96px;
}

.contact-layout {
  align-items: start;
}

.contact-copy {
  max-width: 460px;
}

.contact-list {
  padding: 0;
  margin: 26px 0 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.contact-list li {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.contact-list span:first-child {
  color: var(--muted);
  min-width: 110px;
}

.contact-form {
  flex: 1;
  padding: 28px;
  display: grid;
  gap: 16px;
}

.contact-form label {
  display: grid;
  gap: 8px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 14px 16px;
  background: var(--surface-soft);
}

@media (max-width: 1100px) {
  .product-cards,
  .overview-grid,
  .feature-grid,
  .news-grid,
  .case-strip,
  .product-detail-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-inner,
  .contact-layout,
  .product-layout {
    grid-template-columns: 1fr;
    display: grid;
  }

  .sidebar {
    order: 2;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  .nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 14px;
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--line);
    border-radius: 24px;
    box-shadow: var(--shadow);
  }

  .nav.open {
    display: flex;
  }

  .nav a {
    width: 100%;
    padding: 12px 10px;
  }

  .header-inner {
    position: relative;
    padding: 12px 0;
    flex-wrap: wrap;
  }

  .lang-switch {
    order: 3;
  }

  .product-cards,
  .overview-grid,
  .feature-grid,
  .news-grid,
  .case-strip,
  .product-detail-grid,
  .spec-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 28px;
  }

  .hero h1,
  .section-heading h2,
  .panel-head h3,
  .product-detail h3 {
    font-size: 34px;
  }

  .hero-visual {
    min-height: 300px;
  }

  .speaker.tall {
    width: 84px;
    height: 220px;
  }

  .speaker.medium {
    right: 150px;
    width: 70px;
    height: 180px;
  }

  .speaker.wedge {
    left: 40px;
    width: 120px;
    height: 92px;
  }
}