:root {
  color-scheme: only light;
  --white: #f8fafc;
  --ink: #0b1424;
  --slate: #263241;
  --steel: #4a5b70;
  --blue: #1565c0;
  --blue-dark: #0f4f98;
  --accent: #32b1ff;
  --line: rgba(11, 20, 36, 0.12);
  --shadow: 0 24px 60px rgba(11, 20, 36, 0.16);
  --shadow-sm: 0 16px 36px rgba(11, 20, 36, 0.12);
  --shadow-md: 0 24px 50px rgba(11, 20, 36, 0.18);
  --radius-lg: 28px;
  --radius-md: 18px;
}

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

body {
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at 15% 20%, #e4f2ff 0, transparent 45%),
    radial-gradient(circle at 80% 0%, #eef4ff 0, transparent 50%), var(--white);
  line-height: 1.6;
}

.skip-link {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 10px 16px;
  background: #ffffff;
  border-radius: 999px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  transform: translateY(-200%);
  transition: transform 0.2s ease;
  z-index: 30;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 3px solid rgba(21, 101, 192, 0.45);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(248, 250, 252, 0.9);
  border-bottom: 1px solid var(--line);
}

.nav {
  max-width: 1440px;
  margin: 0 auto;
  padding: 20px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.95rem;
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px;
  gap: 4px;
}

.lang-btn {
  border: none;
  background: transparent;
  padding: 8px 14px;
  border-radius: 999px;
  font-weight: 600;
  color: var(--steel);
  cursor: pointer;
}

.lang-btn.is-active {
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: var(--white);
  box-shadow: 0 10px 20px rgba(15, 79, 152, 0.25);
}

.lang-inline {
  display: none;
}

html[data-lang="en"] .lang-en,
html[data-lang="zh"] .lang-zh {
  display: inline;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: var(--white);
  box-shadow: 0 12px 30px rgba(15, 79, 152, 0.3);
}

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

.btn-outline {
  border-color: var(--line);
  color: var(--ink);
  background: #ffffff;
}

.btn-link {
  font-weight: 500;
  color: var(--blue-dark);
}

.hero {
  max-width: 1440px;
  margin: 0 auto;
  padding: 80px 32px 40px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
  align-items: center;
}

.hero-content h1 {
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
  font-size: clamp(2.5rem, 4vw, 3.6rem);
  line-height: 1.1;
  margin-bottom: 20px;
}

.eyebrow {
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--steel);
  font-size: 0.75rem;
  margin-bottom: 16px;
}

.subhead {
  font-size: 1.1rem;
  color: var(--slate);
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.trust-row div {
  background: rgba(255, 255, 255, 0.85);
  padding: 18px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
}

.trust-row strong {
  display: block;
  font-size: 1.2rem;
  margin-bottom: 6px;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.hero-card {
  background: #ffffff;
  padding: 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  width: min(100%, 460px);
  display: grid;
  gap: 18px;
}

.hero-card-top,
.hero-card-bottom {
  display: flex;
  justify-content: space-between;
  color: var(--steel);
  font-size: 0.9rem;
}

.hero-image {
  background: linear-gradient(135deg, rgba(21, 101, 192, 0.16), rgba(50, 177, 255, 0.2));
  border-radius: var(--radius-md);
  padding: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-photo {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: 14px;
}

.image-placeholder {
  width: 100%;
  min-height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--steel);
  font-weight: 600;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  border-radius: 14px;
  border: 1px dashed rgba(11, 20, 36, 0.25);
  background: repeating-linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.8),
    rgba(255, 255, 255, 0.8) 12px,
    rgba(21, 101, 192, 0.06) 12px,
    rgba(21, 101, 192, 0.06) 24px
  );
}

.image-placeholder.hero {
  height: 220px;
  font-size: 0.85rem;
}

section {
  padding: 70px 32px;
}

.section-header {
  max-width: 980px;
  margin: 0 auto 40px;
  text-align: left;
}

.section-header h2 {
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
  font-size: clamp(2rem, 3vw, 2.6rem);
  margin-bottom: 16px;
}

.overview-grid,
.use-grid,
.benefit-grid {
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.card,
.use-card,
.benefit-card {
  background: #ffffff;
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgba(11, 20, 36, 0.1);
}

.testimonials {
  background: #f7f9fc;
}

.testimonial-grid {
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background: #ffffff;
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgba(11, 20, 36, 0.1);
  display: grid;
  gap: 18px;
}

.testimonial-card blockquote {
  color: var(--slate);
  font-size: 1.02rem;
  line-height: 1.65;
}

.testimonial-card figcaption {
  display: grid;
  gap: 4px;
}

.testimonial-name {
  color: var(--steel);
  font-size: 0.95rem;
}

.comparison {
  max-width: 1440px;
  margin: 40px auto 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  align-items: stretch;
}

.comparison ul {
  padding-left: 18px;
  color: var(--slate);
}

.comparison-panel {
  background: #0f1b2c;
  color: #ffffff;
  border-radius: var(--radius-md);
  padding: 28px;
  display: grid;
  gap: 18px;
}

.panel-row {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 12px;
}

.panel-row strong {
  color: var(--accent);
}

.specs {
  background: #f2f6fb;
}

.specs-grid {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.spec-card {
  background: #ffffff;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  display: grid;
  gap: 6px;
  align-content: start;
  width: fit-content;
  min-width: 180px;
}

.spec-card strong {
  display: block;
  margin-top: 2px;
  font-size: 1rem;
  line-height: 1.35;
}


.specs-detail {
  max-width: 1440px;
  margin: 28px auto 0;
  background: #ffffff;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgba(11, 20, 36, 0.08);
  padding: 24px;
  display: grid;
  gap: 16px;
}

.specs-detail-header h3 {
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
  font-size: 1.4rem;
  margin-bottom: 6px;
}

.specs-detail-header p {
  color: var(--steel);
  font-size: 0.95rem;
}

.specs-detail-grid {
  display: grid;
  gap: 8px;
}

.specs-row {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  color: var(--slate);
}

.specs-row strong {
  color: var(--ink);
  font-weight: 600;
  text-align: right;
}

.specs-row:last-child {
  border-bottom: none;
}

.gallery-grid {
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.gallery-item {
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--line);
}

.gallery-image {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  display: block;
  border-radius: var(--radius-md);
}

.gallery-item.wide .gallery-image {
  aspect-ratio: 4/3;
}

.gallery-item.wide {
  grid-column: span 2;
}

.gallery-item video {
  width: 100%;
  height: 400px;
  object-fit: cover;
  display: block;
  border-radius: var(--radius-md);
}

.gallery-item figcaption {
  padding: 16px 18px;
  font-size: 0.95rem;
  color: var(--slate);
}

.gallery-video-container {
  margin-top: 32px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.gallery-video-item {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s ease;
}

.gallery-video-item:hover {
  box-shadow: var(--shadow-md);
}

.gallery-video-item video {
  width: 100%;
  height: 390px;
  object-fit: cover;
  display: block;
}

.gallery-video-item figcaption {
  padding: 20px 24px;
  font-size: 1rem;
  color: var(--slate);
}

.docs {
  background: #0f1b2c;
  color: #ffffff;
}

.docs-content {
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.docs-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.docs .btn-primary {
  box-shadow: none;
}

.docs-download {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.28);
  color: #ffffff;
}

.docs-download:hover {
  background: rgba(255, 255, 255, 0.16);
}

.contact {
  background: linear-gradient(135deg, #f8fafc 0%, #f0f6ff 100%);
}

.contact-grid {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: stretch;
}

.contact-grid.compact {
  grid-template-columns: 1.2fr 1fr;
  align-items: stretch;
}

.contact-form {
  display: grid;
  gap: 18px;
  background: #ffffff;
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(21, 101, 192, 0.1);
  box-shadow: 0 12px 48px rgba(11, 20, 36, 0.08);
}

label {
  display: grid;
  gap: 8px;
  font-weight: 600;
  color: var(--ink);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

input,
textarea {
  padding: 13px 16px;
  border-radius: 12px;
  border: 1.5px solid var(--line);
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--ink);
  background: #ffffff;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input::placeholder,
textarea::placeholder {
  color: var(--steel);
}

input:hover,
textarea:hover {
  border-color: rgba(21, 101, 192, 0.3);
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(21, 101, 192, 0.15);
  background: #ffffff;
}

.consent {
  grid-template-columns: 24px 1fr;
  align-items: flex-start;
  gap: 12px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--slate);
  text-transform: none;
  letter-spacing: normal;
  margin-top: 4px;
}

.consent input {
  width: 24px;
  height: 24px;
  margin-top: 2px;
  cursor: pointer;
  accent-color: var(--blue);
}

.form-feedback {
  min-height: 22px;
  font-size: 0.9rem;
  color: var(--slate);
  padding: 8px 12px;
  border-radius: 8px;
  line-height: 1.4;
}

.form-feedback.is-error {
  color: #c5222b;
  background: rgba(197, 34, 43, 0.08);
  border: 1px solid rgba(197, 34, 43, 0.2);
}

.form-feedback.is-success {
  color: #0d7344;
  background: rgba(13, 115, 68, 0.08);
  border: 1px solid rgba(13, 115, 68, 0.2);
}

.contact-note {
  margin-top: -4px;
  color: var(--steel);
  font-size: 0.92rem;
}

.bot-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.consent a,
.footer-links a,
.legal-card a {
  color: var(--blue-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.contact-card {
  background: linear-gradient(135deg, #1565c0 0%, #1565c0 100%);
  border: none;
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  display: grid;
  gap: 24px;
  box-shadow: 0 20px 56px rgba(21, 101, 192, 0.25);
  align-content: start;
  color: #ffffff;
}

.contact-card h3 {
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
}

.contact-card .eyebrow {
  color: rgba(255, 255, 255, 0.75);
  margin-bottom: 6px;
}

.contact-card > div {
  display: grid;
  gap: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  padding-bottom: 20px;
}

.contact-card > div:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.contact-card p {
  color: rgba(255, 255, 255, 0.85);
}

.contact-card .muted + .muted {
  margin-top: 6px;
}

.muted {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

.contact-card .btn-primary {
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  box-shadow: none;
  transition: all 0.3s ease;
  font-weight: 600;
}

.contact-card .btn-primary:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

.site-footer {
  padding: 32px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--line);
  background: #ffffff;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 8px;
}

.legal {
  background: linear-gradient(180deg, #ffffff 0%, #f7f9fc 100%);
}

.legal-grid {
  max-width: 1440px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.legal-card {
  background: #ffffff;
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgba(11, 20, 36, 0.08);
}

.legal-card h3 {
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
  margin-bottom: 12px;
  font-size: 1.2rem;
}

.legal-card ul {
  padding-left: 18px;
  color: var(--slate);
}

.legal-card li + li {
  margin-top: 10px;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .nav {
    max-width: 100%;
    padding: 16px 28px;
  }

  .nav-links {
    gap: 16px;
  }

  .hero {
    max-width: 100%;
    gap: 32px;
    padding: 64px 28px 32px;
  }

  section {
    padding: 60px 28px;
  }

  .overview-grid,
  .use-grid,
  .benefit-grid,
  .legal-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav {
    padding: 14px 20px;
    gap: 16px;
  }

  .logo {
    font-size: 1.1rem;
  }

  .nav-links {
    gap: 14px;
    font-size: 0.9rem;
    flex-wrap: wrap;
  }

  .lang-toggle {
    padding: 3px;
  }

  .lang-btn {
    padding: 6px 12px;
    font-size: 0.85rem;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 48px 20px 32px;
  }

  .hero-content h1 {
    font-size: clamp(1.8rem, 5vw, 2.6rem);
    margin-bottom: 16px;
    line-height: 1.15;
  }

  .eyebrow {
    font-size: 0.75rem;
    margin-bottom: 12px;
  }

  .subhead {
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 20px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
    padding: 13px 24px;
  }

  .trust-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .trust-row div {
    padding: 16px;
  }

  .trust-row strong {
    font-size: 1.15rem;
  }

  .hero-visual {
    justify-content: center;
    width: 100%;
  }

  .hero-card {
    width: min(100%, 420px);
    padding: 20px;
    gap: 16px;
  }

  .hero-photo {
    height: 240px;
  }

  .hero-card-top,
  .hero-card-bottom {
    font-size: 0.85rem;
  }

  section {
    padding: 48px 20px;
  }

  .section-header {
    margin-bottom: 32px;
  }

  .section-header h2 {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    margin-bottom: 14px;
    line-height: 1.2;
  }

  .section-header p {
    font-size: 0.95rem;
    line-height: 1.6;
  }

  .overview-grid,
  .use-grid,
  .benefit-grid,
  .legal-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .card,
  .use-card,
  .benefit-card {
    padding: 22px;
  }

  .card h3,
  .use-card h3,
  .benefit-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
  }

  .card p,
  .use-card p,
  .benefit-card p {
    font-size: 0.95rem;
    line-height: 1.6;
  }

  .comparison {
    grid-template-columns: 1fr;
    gap: 24px;
    margin: 40px auto 0;
  }

  .comparison h3 {
    font-size: 1.4rem;
    margin-bottom: 16px;
  }

  .comparison ul {
    padding-left: 20px;
    font-size: 0.95rem;
    gap: 10px;
  }

  .comparison ul li {
    margin-bottom: 10px;
  }

  .comparison-panel {
    padding: 24px;
    gap: 16px;
  }

  .panel-row {
    padding-bottom: 14px;
    font-size: 0.95rem;
  }

  .specs-grid {
    gap: 12px;
    flex-wrap: wrap;
  }

  .spec-card {
    min-width: 170px;
    padding: 16px 18px;
    font-size: 0.9rem;
  }

  .spec-card strong {
    font-size: 0.95rem;
  }

  .specs-detail {
    padding: 22px;
    gap: 18px;
  }

  .specs-detail-header h3 {
    font-size: 1.3rem;
    margin-bottom: 6px;
  }

  .specs-detail-header p {
    font-size: 0.93rem;
  }

  .specs-row {
    grid-template-columns: 1.2fr 1fr;
    gap: 16px;
    padding: 12px 0;
    font-size: 0.93rem;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .gallery-item video {
    height: 180px;
  }

  .gallery-item.wide {
    grid-column: span 1;
  }

  .gallery-video-container {
    margin-top: 20px;
    max-width: 100%;
  }

  .gallery-video-item video {
    height: 240px;
  }

  .gallery-item figcaption {
    padding: 14px 16px;
    font-size: 0.9rem;
  }

  .testimonial-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .testimonial-card {
    padding: 20px;
  }

  .testimonial-card blockquote {
    font-size: 1rem;
    line-height: 1.6;
  }

  .docs {
    padding: 48px 20px;
  }

  .docs-content {
    flex-direction: column;
    gap: 22px;
  }

  .docs-actions {
    width: 100%;
  }

  .docs-content h2 {
    font-size: 1.6rem;
  }

  .docs-content p {
    font-size: 0.95rem;
    line-height: 1.6;
  }

  .contact-grid,
  .contact-grid.compact {
    grid-template-columns: 1fr !important;
    gap: 28px;
  }

  .contact-form {
    padding: 24px;
    gap: 16px;
  }

  .contact-note {
    font-size: 0.9rem;
    line-height: 1.55;
  }

  .contact-card {
    padding: 28px;
    gap: 20px;
  }

  .contact-card > div {
    gap: 10px;
    padding-bottom: 20px;
  }

  .contact-card h3 {
    font-size: 1.3rem;
  }

  label {
    font-size: 0.9rem;
  }

  input,
  textarea {
    padding: 11px 14px;
    font-size: 1rem;
    border-radius: 8px;
  }

  .btn {
    padding: 12px 24px;
    font-size: 0.95rem;
    border-radius: 999px;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    padding: 28px 20px;
    gap: 20px;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .nav {
    padding: 12px 16px;
    flex-wrap: wrap;
  }

  .logo {
    font-size: 1rem;
  }

  .nav-links {
    display: none;
  }

  .lang-toggle {
    padding: 2px;
  }

  .lang-btn {
    padding: 4px 10px;
    font-size: 0.75rem;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 24px;
  }

  .hero-content h1 {
    font-size: clamp(1.5rem, 6vw, 2rem);
    margin-bottom: 12px;
  }

  .eyebrow {
    font-size: 0.7rem;
    margin-bottom: 10px;
    letter-spacing: 1.5px;
  }

  .subhead {
    font-size: 0.95rem;
    margin-bottom: 16px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 10px;
  }

  .hero-actions .btn {
    padding: 12px 20px;
    font-size: 0.9rem;
  }

  .trust-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .trust-row div {
    padding: 12px;
  }

  .trust-row strong {
    font-size: 1.1rem;
  }

  .trust-row span {
    font-size: 0.85rem;
  }

  .hero-card {
    padding: 16px;
    gap: 12px;
    width: 100%;
  }

  .hero-photo {
    height: 200px;
    border-radius: 12px;
  }

  .hero-card-top,
  .hero-card-bottom {
    font-size: 0.8rem;
    gap: 4px;
  }

  section {
    padding: 32px 16px;
  }

  .section-header {
    margin-bottom: 24px;
  }

  .section-header h2 {
    font-size: clamp(1.4rem, 5vw, 1.8rem);
    margin-bottom: 10px;
  }

  .section-header p {
    font-size: 0.9rem;
  }

  .overview-grid,
  .use-grid,
  .benefit-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .card,
  .use-card,
  .benefit-card {
    padding: 16px;
  }

  .card h3,
  .use-card h3,
  .benefit-card h3 {
    font-size: 1.05rem;
    margin-bottom: 8px;
  }

  .card p,
  .use-card p,
  .benefit-card p {
    font-size: 0.9rem;
  }

  .comparison {
    gap: 20px;
  }

  .comparison h3 {
    font-size: 1.2rem;
  }

  .comparison ul {
    padding-left: 16px;
    font-size: 0.9rem;
  }

  .comparison-panel {
    padding: 16px;
    gap: 12px;
  }

  .panel-row {
    padding-bottom: 10px;
    font-size: 0.88rem;
  }

  .specs-grid {
    gap: 8px;
  }

  .spec-card {
    min-width: 140px;
    padding: 12px 14px;
    font-size: 0.8rem;
  }

  .specs-detail {
    padding: 16px;
    gap: 14px;
  }

  .specs-detail-header h3 {
    font-size: 1.15rem;
  }

  .specs-detail-header p {
    font-size: 0.85rem;
  }

  .specs-row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 10px 0;
    font-size: 0.85rem;
  }

  .specs-row strong {
    font-size: 0.9rem;
    text-align: left;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .gallery-item video {
    height: 160px;
  }

  .gallery-item.wide {
    grid-column: span 1;
  }

  .gallery-video-container {
    margin-top: 16px;
    max-width: 100%;
  }

  .gallery-video-item video {
    height: 200px;
  }

  .gallery-item figcaption {
    padding: 12px 14px;
    font-size: 0.85rem;
  }

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

  .testimonial-card {
    padding: 16px;
    gap: 12px;
  }

  .testimonial-card blockquote {
    font-size: 0.92rem;
    line-height: 1.6;
  }

  .testimonial-name {
    font-size: 0.85rem;
  }

  .docs {
    padding: 32px 16px;
  }

  .docs-content {
    gap: 16px;
  }

  .docs-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .docs-actions .btn {
    width: 100%;
  }

  .docs-content h2 {
    font-size: 1.4rem;
  }

  .docs-content p {
    font-size: 0.9rem;
  }

  .contact-grid,
  .contact-grid.compact {
    grid-template-columns: 1fr !important;
    gap: 32px;
  }

  .contact-form {
    padding: 20px;
    gap: 14px;
  }

  .contact-card {
    padding: 24px;
    gap: 20px;
    margin-top: 12px;
    border-top: 2px solid rgba(21, 101, 192, 0.15);
    padding-top: 32px;
  }

  .contact-card h3 {
    font-size: 1.25rem;
  }

  .contact-card > div {
    gap: 10px;
    padding-bottom: 24px;
  }

  .contact-card > div:last-child {
    padding-bottom: 0;
  }

  label {
    font-size: 0.85rem;
  }

  input,
  textarea {
    padding: 10px 12px;
    font-size: 0.95rem;
  }

  .btn {
    padding: 11px 20px;
    font-size: 0.9rem;
  }

  .site-footer {
    padding: 20px 16px;
    gap: 12px;
    font-size: 0.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}