/* ===== Design Tokens ===== */
:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #0c0c14;
  --bg-card: #12121a;
  --bg-input: #0a0a0f;
  --bg-footer: #080810;
  --accent: #00d4ff;
  --accent-soft: rgba(0, 212, 255, 0.1);
  --text-primary: #ffffff;
  --text-secondary: #8a8aa0;
  --text-muted: #50506a;
  --border: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.08);
  --shadow: rgba(0, 212, 255, 0.1);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --max-width: 1440px;
  --gap-sm: 12px;
  --gap-md: 16px;
  --gap-lg: 24px;
  --gap-xl: 48px;
  --header-height: 80px;
  --transition: 0.25s ease;
}

/* ===== Reset ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* 图片占位回退：图片缺失时显示渐变底，避免出现破图 */
.product-image, .hero-visual, .tech-image, .about-image {
  background: linear-gradient(135deg, #0f1420 0%, #1a2235 60%, #0f1420 100%);
}
.img-broken {
  opacity: 0;
}

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* ===== Utilities ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding-left: 48px;
  padding-right: 48px;
}

.section-label {
  color: var(--accent);
  font-size: 14px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--gap-sm);
}

.section-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: var(--gap-sm);
}

.section-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  font-weight: 400;
}

/* ===== Header ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(15, 15, 23, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.logo-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.logo-sub {
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.nav-desktop {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--gap-md);
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-secondary);
}

.lang-toggle button {
  color: var(--text-secondary);
  transition: color var(--transition);
  padding: 0;
}

.lang-toggle button.active {
  color: var(--accent);
  font-weight: 600;
}

.lang-toggle button:hover {
  color: var(--accent);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
}

.btn-primary:hover {
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.03);
}

.btn-large {
  padding: 14px 32px;
  font-size: 16px;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: transparent;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition), opacity var(--transition);
}

.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: rgba(15, 15, 23, 0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  z-index: 999;
}

.mobile-menu[hidden] {
  display: none;
}

.mobile-menu .nav-link {
  font-size: 16px;
  padding: 8px 0;
}

/* ===== Hero ===== */
.hero {
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 440px;
  gap: var(--gap-xl);
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--accent-soft);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: var(--gap-lg);
}

.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

.hero-title {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.14;
  margin-bottom: var(--gap-sm);
}

.hero-title span {
  color: var(--accent);
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: var(--gap-lg);
  max-width: 560px;
}

.hero-cta {
  display: flex;
  align-items: center;
  gap: var(--gap-md);
  margin-bottom: var(--gap-xl);
}

.hero-stats {
  display: flex;
  gap: var(--gap-xl);
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hero-stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
}

.hero-stat-label {
  font-size: 12px;
  color: var(--text-muted);
}

.hero-visual {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--bg-card);
  box-shadow: 0 20px 60px rgba(0, 212, 255, 0.1);
  aspect-ratio: 1 / 1;
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== Sections ===== */
.section {
  padding: 80px 0;
}

.bg-secondary {
  background-color: var(--bg-secondary);
}

/* ===== Products ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap-lg);
  margin-top: 40px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 212, 255, 0.2);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 40px rgba(0, 212, 255, 0.05);
}

.product-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  background: #1a1a2e;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-image img {
  transform: scale(1.05);
}

.product-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.product-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.product-name-en {
  font-size: 12px;
  color: var(--accent);
  font-weight: 400;
}

.product-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-top: 4px;
}

.product-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  margin-top: 8px;
  display: inline-flex;
  transition: opacity var(--transition);
}

.product-link:hover {
  opacity: 0.8;
}

/* ===== Technology ===== */
.tech-grid {
  display: grid;
  grid-template-columns: 1fr 480px;
  gap: var(--gap-xl);
  align-items: center;
}

.tech-features {
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
  margin-top: var(--gap-lg);
}

.tech-feature {
  display: flex;
  align-items: flex-start;
  gap: var(--gap-md);
}

.tech-feature-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--accent);
}

.tech-feature-text {
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.5;
}

.tech-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--bg-card);
  box-shadow: 0 20px 50px rgba(0, 212, 255, 0.08);
  aspect-ratio: 1 / 1;
}

.tech-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== About ===== */
.about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.about-description {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-top: var(--gap-lg);
}

.about-image {
  max-width: 800px;
  margin: 40px auto 0;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--bg-card);
  aspect-ratio: 20 / 7;
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== Markets ===== */
.markets-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-lg);
  margin-top: 40px;
}

.market-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform var(--transition), border-color var(--transition);
}

.market-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 255, 0.2);
}

.market-name {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.market-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: var(--gap-xl);
  margin-top: 40px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 13px;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.08);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-message {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  display: none;
}

.form-message.success {
  background: rgba(0, 212, 255, 0.1);
  color: var(--accent);
  border: 1px solid rgba(0, 212, 255, 0.2);
}

.form-message.error {
  background: rgba(255, 80, 80, 0.1);
  color: #ff5050;
  border: 1px solid rgba(255, 80, 80, 0.2);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-info-item h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.contact-info-item p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-footer);
  border-top: 1px solid var(--border);
  padding: 48px 0 0;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 32px;
}

.footer-brand {
  max-width: 360px;
}

.footer-logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-nav {
  display: flex;
  gap: 64px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col a {
  font-size: 13px;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 992px) {
  .container {
    padding-left: 24px;
    padding-right: 24px;
  }

  .nav-desktop {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .header-right .btn {
    display: none;
  }

  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
  }

  .hero-visual {
    max-width: 480px;
    margin: 0 auto;
  }

  .tech-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .tech-image {
    max-width: 480px;
    margin: 0 auto;
  }

  .markets-grid {
    grid-template-columns: 1fr;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-top {
    flex-direction: column;
    gap: 32px;
  }

  .footer-nav {
    gap: 40px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

@media (max-width: 768px) {
  .section-title {
    font-size: 28px;
  }

  .hero-title {
    font-size: 40px;
  }

  .hero-stats {
    gap: 24px;
  }

  .products-grid {
    grid-template-columns: 1fr;
  }

  .footer-nav {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn-large {
    width: 100%;
  }
}

/* ===== Product Specs & Applications Tags ===== */
.product-specs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.spec-badge {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  padding: 4px 10px;
  font-size: 11px;
  line-height: 1.4;
  background: var(--accent-soft);
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: 100px;
  color: var(--accent);
  white-space: nowrap;
}

.spec-badge i {
  font-style: normal;
  color: var(--text-muted);
}

.product-apps {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.app-tag {
  padding: 3px 9px;
  font-size: 11px;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-light);
  border-radius: 4px;
}

.product-link {
  margin-top: 14px;
  align-self: flex-start;
  padding: 4px 0;
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: inherit;
}

/* ===== Technology Capabilities ===== */
.tech-capabilities {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-md);
  margin-top: var(--gap-lg);
}

.capability-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: transform var(--transition), border-color var(--transition);
}

.capability-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 255, 0.2);
}

.capability-icon {
  width: 40px;
  height: 40px;
  color: var(--accent);
  margin-bottom: 12px;
}

.capability-icon svg {
  width: 100%;
  height: 100%;
}

.capability-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.capability-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ===== Applications ===== */
.applications-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--gap-lg);
  margin-top: 40px;
}

.application-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.application-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 212, 255, 0.2);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.application-icon {
  width: 44px;
  height: 44px;
  color: var(--accent);
  margin-bottom: 16px;
}

.application-icon svg {
  width: 100%;
  height: 100%;
}

.application-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.application-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Product Detail Modal ===== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.modal.open {
  display: flex;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(5, 5, 10, 0.75);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.modal-dialog {
  position: relative;
  width: 100%;
  max-width: 640px;
  max-height: 88vh;
  overflow-y: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.5);
  outline: none;
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 16px;
  width: 36px;
  height: 36px;
  font-size: 24px;
  line-height: 1;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  transition: color var(--transition), background var(--transition);
  z-index: 2;
}

.modal-close:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}

.modal-content {
  padding: 32px;
}

.modal-product-head {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  justify-content: space-between;
}

.modal-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-subtitle {
  font-size: 13px;
  color: var(--accent);
}

.modal-product-image {
  width: 120px;
  height: 120px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: linear-gradient(135deg, #0f1420 0%, #1a2235 60%, #0f1420 100%);
}

.modal-product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-top: 16px;
}

.modal-section-title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin: 24px 0 12px;
}

.spec-table {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.spec-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  background: var(--bg-secondary);
  font-size: 13px;
}

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

.spec-value {
  color: var(--text-primary);
  font-weight: 500;
  text-align: right;
}

.modal-apps {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.modal-cta {
  width: 100%;
  margin-top: 24px;
}

/* ===== Capabilities / Applications Responsive ===== */
@media (max-width: 992px) {
  .tech-capabilities {
    grid-template-columns: repeat(2, 1fr);
  }

  .applications-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .modal {
    padding: 12px;
  }

  .modal-content {
    padding: 24px 20px;
  }

  .modal-product-head {
    flex-direction: column;
  }

  .modal-product-image {
    width: 100%;
    height: 180px;
  }

  .spec-table {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .tech-capabilities {
    grid-template-columns: 1fr;
  }

  .applications-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== Trust / Why Choose Us ===== */
.cert-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin: 36px 0 8px;
}
.cert-badge {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.cert-badge::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.guarantees-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 32px;
}
.guarantee-card {
  background: var(--panel, rgba(255, 255, 255, 0.03));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 22px;
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.guarantee-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
}
.guarantee-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  color: var(--accent);
}
.guarantee-icon svg {
  width: 100%;
  height: 100%;
}
.guarantee-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text-primary);
}
.guarantee-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* ===== Applications example ===== */
.application-example {
  margin-top: 12px;
  font-size: 13px;
  color: var(--accent);
  opacity: 0.85;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 820px;
  margin: 40px auto 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel, rgba(255, 255, 255, 0.03));
  overflow: hidden;
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}
.faq-chevron {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--accent);
  transition: transform 0.3s ease;
}
.faq-item.open .faq-chevron {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-item.open .faq-answer {
  max-height: 480px;
}
.faq-answer p {
  padding: 0 24px 20px;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ===== Floating Quote CTA ===== */
.floating-cta {
  position: fixed;
  right: 24px;
  bottom: 28px;
  z-index: 90;
  padding: 14px 22px;
  border-radius: 999px;
  background: var(--accent);
  color: #04121a;
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.35);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.floating-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0, 212, 255, 0.5);
}

/* ===== Footer certs ===== */
.footer-certs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin: 28px 0 4px;
}
.footer-certs .cert-badge {
  padding: 7px 15px;
  font-size: 12px;
}

/* ===== Responsive for new sections ===== */
@media (max-width: 992px) {
  .guarantees-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .guarantees-grid {
    grid-template-columns: 1fr;
  }
  .floating-cta {
    right: 16px;
    bottom: 18px;
    padding: 12px 18px;
    font-size: 13px;
  }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}