:root {
  --bg: #07111f;
  --bg-soft: #0b1830;
  --bg-card: rgba(14, 28, 52, 0.78);
  --bg-card-strong: rgba(16, 34, 61, 0.92);
  --line: rgba(150, 190, 230, 0.16);
  --line-strong: rgba(150, 190, 230, 0.28);
  --text: #ecf3ff;
  --text-soft: #b9c8df;
  --text-muted: #8ea1bf;
  --accent: #72d7e7;
  --accent-2: #8aa9ff;
  --success: #74d39a;
  --danger: #ff8c8c;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.35);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --container: 1180px;
  --transition: 0.25s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 10%, rgba(57, 104, 255, 0.22), transparent 24%),
    radial-gradient(circle at 82% 12%, rgba(67, 201, 175, 0.18), transparent 22%),
    radial-gradient(circle at 80% 92%, rgba(55, 121, 255, 0.18), transparent 24%),
    linear-gradient(180deg, #06101d 0%, #07111f 38%, #081424 100%);
  min-height: 100vh;
  line-height: 1.6;
}

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

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

a:hover {
  color: #a7ecf5;
}

button,
input,
textarea {
  font: inherit;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: rgba(5, 11, 22, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.brand:hover {
  color: var(--text);
  opacity: 0.95;
}

.brand-logo {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: center;
}

.nav a {
  color: var(--text-soft);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--text);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.lang-switch button {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-soft);
  border-radius: 999px;
  padding: 7px 12px;
  cursor: pointer;
  transition: all var(--transition);
}

.lang-switch button:hover {
  color: var(--text);
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.05);
}

/* Hero */
.hero {
  padding: 72px 0 32px;
}

.hero-page {
  padding-top: 64px;
}

.hero-split {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 32px;
  align-items: center;
}

.hero-copy {
  min-width: 0;
}

.hero-split h1,
.hero-split h2,
.hero-split .lead {
  max-width: none;
}

.hero-media {
  margin: 0;
  min-width: 0;
  position: relative;
}

.hero-media::before {
  content: "";
  position: absolute;
  inset: 8% -5% -8% 12%;
  background: radial-gradient(circle, rgba(114, 215, 231, 0.18), transparent 68%);
  filter: blur(16px);
  pointer-events: none;
  z-index: 0;
}

.hero-media-frame {
  position: relative;
  z-index: 1;
  overflow: hidden;
  border-radius: calc(var(--radius-lg) + 4px);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(10, 22, 42, 0.92) 0%, rgba(6, 16, 29, 0.98) 100%);
  box-shadow: var(--shadow);
}

.hero-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--accent);
  background: rgba(114, 215, 231, 0.08);
  border: 1px solid rgba(114, 215, 231, 0.18);
  font-size: 0.9rem;
  font-weight: 600;
}

.hero h1,
.hero h2 {
  margin: 0 0 18px;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.04em;
  max-width: 960px;
}

.lead {
  margin: 0;
  max-width: 920px;
  color: var(--text-soft);
  font-size: clamp(1rem, 1.6vw, 1.18rem);
}

.hero-actions,
.section-actions {
  margin-top: 28px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
  cursor: pointer;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #88c8ff);
  color: #06101d;
  box-shadow: 0 12px 30px rgba(114, 215, 231, 0.18);
}

.btn-primary:hover {
  color: #06101d;
  box-shadow: 0 18px 36px rgba(114, 215, 231, 0.22);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  border-color: var(--line);
}

.btn-secondary:hover {
  color: var(--text);
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.06);
}

.text-link {
  color: var(--accent);
  font-weight: 600;
}

/* Sections */
.section {
  padding: 34px 0;
}

.section-highlight .card,
.section-cta {
  position: relative;
}

.section-head {
  margin-bottom: 22px;
}

.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.section-head p {
  margin: 0;
  color: var(--text-soft);
  max-width: 900px;
}

/* Grid + cards */
.grid {
  display: grid;
  gap: 18px;
}

.cards-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cards-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.cards-6 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cards-8 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  background: linear-gradient(180deg, rgba(15, 29, 52, 0.82) 0%, rgba(10, 20, 37, 0.9) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 22px;
  box-shadow: var(--shadow);
  min-height: 100%;
}

.card:hover {
  border-color: var(--line-strong);
}

.media-card {
  padding: 0;
  overflow: hidden;
}

.media-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
}

.media-card-body {
  display: grid;
  gap: 10px;
  padding: 20px 22px 22px;
}

.media-card-body h3,
.media-card-body p {
  margin: 0;
}

.media-card .text-link {
  display: inline-flex;
  align-items: center;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
  line-height: 1.25;
  color: var(--text);
}

.card p,
.card li {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.97rem;
}

.card ul {
  margin: 0;
  padding-left: 18px;
}

.icon-card {
  position: relative;
  overflow: hidden;
}

.icon-card::after {
  content: "";
  position: absolute;
  inset: auto -20% -35% auto;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(114, 215, 231, 0.09), transparent 70%);
  pointer-events: none;
}

/* Contact + verify */
.contact-card,
.verify-box {
  background: linear-gradient(180deg, rgba(15, 29, 52, 0.86) 0%, rgba(9, 20, 37, 0.92) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}

.contact-card-main {
  max-width: 860px;
}

.contact-group {
  background: linear-gradient(180deg, rgba(15, 29, 52, 0.6) 0%, rgba(9, 20, 37, 0.75) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-group h3 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--text);
  font-weight: 600;
}

.contact-group-desc {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.99rem;
  line-height: 1.5;
}

.contact-group-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(114, 215, 231, 0.15);
  border-radius: var(--radius-base);
  padding: 16px;
  margin-top: 8px;
}

.contact-person {
  margin: 0 0 4px;
  color: var(--text);
  font-size: 1rem;
}

.contact-role {
  margin: 0 0 12px;
  color: rgba(114, 215, 231, 0.8);
  font-size: 0.93rem;
  font-weight: 500;
}

.contact-group .contact-line {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.section-note {
  margin-top: 18px;
  padding: 12px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.meta-text {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.915rem;
}

/* CTA Block */
.section-cta-block {
  margin-top: 48px;
}

.cta-block {
  background: linear-gradient(135deg, rgba(114, 215, 231, 0.08) 0%, rgba(88, 126, 255, 0.08) 100%);
  border: 1px solid rgba(114, 215, 231, 0.25);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  backdrop-filter: blur(8px);
}

.cta-block h2 {
  margin: 0 0 12px;
  font-size: 1.3rem;
  color: var(--text);
}

.cta-block p {
  margin: 0 0 24px;
  color: var(--text-soft);
  font-size: 1rem;
  line-height: 1.6;
  max-width: 540px;
  margin-left: auto;
  margin-right: auto;
}

.cta-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 12px;
  border: none;
  font-weight: 600;
  font-size: 0.96rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  text-decoration: none;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #72d7e7);
  color: #07111f;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(114, 215, 231, 0.25);
  background: linear-gradient(135deg, #70d5e5, #7ae0ef);
}

.btn-secondary {
  background: rgba(114, 215, 231, 0.15);
  border: 1px solid var(--accent);
  color: var(--accent);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  background: rgba(114, 215, 231, 0.25);
  box-shadow: 0 12px 28px rgba(114, 215, 231, 0.15);
}

.grid.cards-2 {
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
}

.contact-line,
.footer-contact-line {
  margin: 0 0 12px;
  color: var(--text-soft);
}

.contact-line:last-child,
.footer-contact-line:last-child {
  margin-bottom: 0;
}

.verify-label {
  display: inline-block;
  margin-bottom: 10px;
  font-weight: 600;
  color: var(--text);
}

.certificate-verify-form {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.certificate-verify-form input,
.contact-card input,
.contact-card textarea {
  width: min(100%, 420px);
  min-height: 48px;
  padding: 0 16px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  outline: none;
  transition: border-color var(--transition), background var(--transition);
}

.contact-card textarea {
  min-height: 140px;
  padding: 14px 16px;
  resize: vertical;
}

.certificate-verify-form input::placeholder,
.contact-card input::placeholder,
.contact-card textarea::placeholder {
  color: var(--text-muted);
}

.certificate-verify-form input:focus,
.contact-card input:focus,
.contact-card textarea:focus {
  border-color: rgba(114, 215, 231, 0.45);
  background: rgba(255, 255, 255, 0.05);
}

.certificate-verify-form button {
  min-height: 48px;
  padding: 0 18px;
  border-radius: 14px;
  border: none;
  background: linear-gradient(135deg, var(--accent), #88c8ff);
  color: #07111f;
  font-weight: 700;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
}

.certificate-verify-form button:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(114, 215, 231, 0.2);
}

.certificate-result {
  margin-top: 18px;
}

/* Lists */
ul {
  color: var(--text-soft);
}

.section ul {
  margin: 12px 0 0;
  padding-left: 20px;
}

.section li + li {
  margin-top: 8px;
}

/* Footer */
.footer {
  margin-top: 56px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(5, 10, 19, 0.82);
  backdrop-filter: blur(16px);
}

.footer-container {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
  padding: 34px 0 24px;
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr 1fr;
  gap: 20px;
}

.footer-col {
  min-width: 0;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 700;
}

.footer-brand:hover {
  color: var(--text);
}

.footer-logo {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.footer-brand-name {
  font-size: 1.02rem;
}

.footer-title {
  margin: 0 0 12px;
  font-size: 1rem;
  color: var(--text);
}

.footer-desc,
.footer-partnership,
.footer-verify-text,
.footer-context p,
.footer-bottom,
.footer-mini-links,
.footer-contact-line {
  color: var(--text-soft);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li + li {
  margin-top: 10px;
}

.footer-links a {
  color: var(--text-soft);
}

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

.footer-social {
  margin-top: 14px;
}

.social-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
}

.social-link:hover {
  border-color: var(--line-strong);
  color: var(--text);
}

.footer-verify {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
  padding-bottom: 24px;
}

.footer-verify-inner {
  background: linear-gradient(180deg, rgba(12, 25, 45, 0.88) 0%, rgba(8, 18, 32, 0.96) 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow);
}

.footer-verify-note {
  margin: 14px 0 0;
  color: var(--text-soft);
}

.footer-context {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
  padding: 0 0 22px;
}

.footer-context p {
  margin: 0;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-bottom-inner {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
  padding: 18px 0 28px;
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.footer-copy,
.footer-institutional,
.footer-mini-links {
  color: var(--text-muted);
}

.footer-sep {
  margin: 0 8px;
  color: var(--text-muted);
}

/* Helpers */
.contact {
  padding-bottom: 12px;
}

.contact-card a,
.footer a {
  word-break: break-word;
}

/* Responsive */
@media (max-width: 1120px) {
  .hero-split {
    grid-template-columns: 1fr;
  }

  .hero-media {
    max-width: 760px;
  }

  .cards-4,
  .cards-8 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cards-3,
  .cards-6 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer-container {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .header-inner {
    min-height: unset;
    padding: 16px 0;
    flex-direction: column;
    align-items: flex-start;
  }

  .nav {
    width: 100%;
    justify-content: flex-start;
    gap: 12px 16px;
  }

  .lang-switch {
    align-self: flex-start;
  }

  .hero {
    padding-top: 40px;
  }

  .hero-media {
    max-width: none;
  }

  .footer-container {
    grid-template-columns: 1fr;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(var(--container), calc(100% - 20px));
  }

  .cards-3,
  .cards-4,
  .cards-6,
  .cards-8 {
    grid-template-columns: 1fr;
  }

  .card,
  .contact-card,
  .footer-verify-inner {
    padding: 18px;
  }

  .certificate-verify-form {
    flex-direction: column;
    align-items: stretch;
  }

  .certificate-verify-form input,
  .certificate-verify-form button {
    width: 100%;
  }

  .btn {
    width: 100%;
  }

  .hero-actions {
    align-items: stretch;
  }
}