:root {
  --navy: #062b3f;
  --cyan: #00b8d9;
  --glass: rgba(255, 255, 255, 0.72);
  --glass-strong: rgba(255, 255, 255, 0.86);
  --text: #072c3f;
  --muted: #4b6675;
  --cta: #16a34a;
  --warning: #f97316;
  --border: rgba(255, 255, 255, 0.55);
  --shadow: 0 20px 40px rgba(7, 42, 63, 0.14);
  --radius-lg: 26px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --container: min(1180px, 92vw);
}

body.dark-theme {
  --glass: rgba(7, 30, 45, 0.7);
  --glass-strong: rgba(7, 30, 45, 0.84);
  --text: #ebf7ff;
  --muted: #b8d4e3;
  --border: rgba(121, 170, 198, 0.22);
  --shadow: 0 26px 50px rgba(0, 0, 0, 0.35);
  background:
    radial-gradient(circle at 8% -5%, rgba(0, 184, 217, 0.25), transparent 36%),
    radial-gradient(circle at 95% 5%, rgba(65, 132, 212, 0.24), transparent 32%),
    linear-gradient(168deg, #031a28 0%, #062638 54%, #083146 100%);
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: "Be Vietnam Pro", Arial, sans-serif;
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  background:
    radial-gradient(circle at 8% -5%, rgba(0, 184, 217, 0.24), transparent 36%),
    radial-gradient(circle at 95% 5%, rgba(69, 150, 225, 0.2), transparent 32%),
    radial-gradient(circle at 50% 110%, rgba(249, 115, 22, 0.12), transparent 35%),
    linear-gradient(168deg, #f6fcff 0%, #ecf7fc 54%, #e9f4fb 100%);
  min-height: 100vh;
}

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

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

.container { width: var(--container); margin: 0 auto; }

.section { padding: clamp(54px, 7vw, 88px) 0; }

.section-alt {
  background: linear-gradient(180deg, rgba(255,255,255,0.15), rgba(255,255,255,0.28));
  border-top: 1px solid rgba(255,255,255,0.45);
  border-bottom: 1px solid rgba(255,255,255,0.45);
}

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

.section-head h2 {
  margin: 0 0 10px;
  font-size: clamp(1.5rem, 2.4vw, 2.2rem);
  line-height: 1.3;
}

.section-head p { margin: 0; color: var(--muted); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(255,255,255,0.58);
  border-bottom: 1px solid var(--border);
}

body.dark-theme .site-header { background: rgba(7, 30, 45, 0.62); }

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
}

.logo-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--cta));
  box-shadow: 0 0 0 7px rgba(0, 184, 217, 0.18);
}

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

.main-nav > a {
  padding: 9px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: 220ms ease;
}

.main-nav > a:hover,
.main-nav > a.active {
  color: var(--text);
  background: rgba(255,255,255,0.55);
}

.nav-cta {
  display: inline-flex;
  gap: 8px;
  margin-left: 8px;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.55);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 5px;
}

.hero-block {
  padding: clamp(56px, 8vw, 96px) 0 clamp(42px, 6vw, 72px);
}

.hero-grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.hero-grid h1 {
  margin: 0 0 14px;
  font-size: clamp(1.85rem, 4vw, 3rem);
  line-height: 1.24;
}

.hero-grid p {
  margin: 0;
  color: var(--muted);
  max-width: 64ch;
}

.hero-actions {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 600;
  font-size: 0.96rem;
  min-height: 48px;
  cursor: pointer;
  transition: transform 200ms ease, box-shadow 200ms ease, background 200ms ease;
}

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

.btn-call { background: var(--cta); color: #fff; }

.btn-zalo { background: linear-gradient(135deg, #0991d8, #00b8d9); color: #fff; }

.btn-ghost {
  background: rgba(255,255,255,0.54);
  border-color: var(--border);
  color: var(--text);
}

.glass-visual {
  position: relative;
  min-height: 280px;
}

.glow {
  position: absolute;
  border-radius: 999px;
  filter: blur(8px);
}

.glow.one {
  width: 180px;
  height: 180px;
  background: rgba(0, 184, 217, 0.22);
  top: 20px;
  left: 12px;
}

.glow.two {
  width: 220px;
  height: 220px;
  background: rgba(22, 163, 74, 0.18);
  right: 8px;
  bottom: 10px;
}

.glass-card {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 20px;
  backdrop-filter: blur(16px) saturate(145%);
  -webkit-backdrop-filter: blur(16px) saturate(145%);
}

.glass-card h3 { margin: 0 0 10px; font-size: 1.1rem; }
.glass-card p { margin: 0; color: var(--muted); }

.hero-photo-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 16px;
  margin-bottom: 14px;
}

.card-photo {
  margin: -20px -20px 14px;
  border-radius: 24px 24px 16px 16px;
  overflow: hidden;
  border-bottom: 1px solid rgba(120, 145, 165, 0.24);
}

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

.inline-photo {
  margin: 14px 0 6px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  background: rgba(255,255,255,0.72);
}

.inline-photo img {
  width: 100%;
  max-height: 520px;
  object-fit: cover;
}

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

.text-link {
  display: inline-flex;
  margin-top: 12px;
  color: #046a8d;
  font-weight: 600;
}

.benefit-grid,
.check-list,
.step-list {
  margin: 0;
  padding-left: 20px;
  display: grid;
  gap: 10px;
}

.benefit-grid li,
.check-list li,
.step-list li {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  list-style-position: inside;
}

.step-list li { list-style-type: decimal; }

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--glass);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

table th,
table td {
  text-align: left;
  padding: 14px;
  border-bottom: 1px solid rgba(120, 145, 165, 0.24);
  vertical-align: top;
}

table th {
  background: rgba(255,255,255,0.45);
  font-weight: 700;
}

.faq-item {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
}

.faq-item p { margin: 12px 0 0; color: var(--muted); }

.article-wrap {
  display: grid;
  gap: 10px;
}

.article-wrap h2 {
  margin: 18px 0 8px;
  font-size: clamp(1.35rem, 2vw, 1.8rem);
}

.article-wrap h3 {
  margin: 12px 0 6px;
  font-size: clamp(1.08rem, 1.5vw, 1.25rem);
}

.article-wrap p { margin: 0; color: var(--text); }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 0.92rem;
}

.breadcrumb a { color: #047aa3; font-weight: 500; }

.cta-band {
  padding: clamp(36px, 6vw, 56px) 0;
}

.cta-inner {
  display: grid;
  gap: 14px;
  align-items: center;
  background: linear-gradient(135deg, rgba(6,43,63,0.9), rgba(0,184,217,0.75));
  color: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.24);
  padding: 24px;
}

.cta-inner h2 { margin: 0 0 8px; color: #fff; }
.cta-inner p { margin: 0; color: rgba(255,255,255,0.9); }

.quick-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.section-action {
  margin-top: 22px;
  display: flex;
  justify-content: center;
}

.contact-layout {
  display: grid;
  gap: 16px;
}

label {
  display: grid;
  gap: 7px;
  font-weight: 500;
}

input,
textarea {
  font: inherit;
  border: 1px solid rgba(120, 150, 173, 0.35);
  border-radius: 12px;
  padding: 12px 14px;
  background: rgba(255,255,255,0.85);
}

textarea { resize: vertical; }

.form-message {
  min-height: 24px;
  margin: 6px 0 0;
  color: var(--cta);
  font-weight: 600;
}

.map-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.map-wrap iframe {
  display: block;
  width: 100%;
  min-height: 360px;
  border: 0;
}

.site-footer {
  margin-top: 30px;
  background: rgba(6,43,63,0.9);
  color: #d8edf8;
  border-top: 1px solid rgba(255,255,255,0.18);
}

.footer-grid {
  display: grid;
  gap: 22px;
  padding: 36px 0 24px;
}

.site-footer h3 {
  margin: 0 0 10px;
  color: #fff;
}

.site-footer p { margin: 0; }

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.site-footer a { color: #d5f2ff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.2);
  text-align: center;
  padding: 14px 0;
  font-size: 0.9rem;
}

.floating-tools {
  position: fixed;
  right: 16px;
  bottom: 18px;
  display: grid;
  gap: 12px;
  z-index: 82;
}

.tool-btn {
  position: relative;
  width: 58px;
  height: 58px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  box-shadow: var(--shadow);
  isolation: isolate;
}

.tool-btn::before {
  content: "";
  position: absolute;
  inset: -7px;
  border-radius: 999px;
  border: 2px solid rgba(12, 190, 235, 0.4);
  opacity: 0;
  transform: scale(0.75);
  animation: pulseRing 1.8s ease-out infinite;
  z-index: -1;
}

.tool-btn.call { background: var(--cta); }
.tool-btn.zalo { background: #0084ff; }

.tool-btn.call::before { border-color: rgba(22, 163, 74, 0.42); animation-delay: 0.15s; }
.tool-btn.zalo::before { border-color: rgba(0, 132, 255, 0.45); }

@keyframes pulseRing {
  0% {
    opacity: 0.72;
    transform: scale(0.78);
  }
  80% {
    opacity: 0;
    transform: scale(1.22);
  }
  100% {
    opacity: 0;
    transform: scale(1.24);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.show {
  opacity: 1;
  transform: translateY(0);
}

@media (min-width: 768px) {
  .hero-grid { grid-template-columns: 1.1fr 0.9fr; }
  .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .faq-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .contact-layout { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
  .cta-inner { grid-template-columns: 1fr auto; }
}

@media (min-width: 1024px) {
  .card-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 1023px) {
  .menu-toggle { display: inline-flex; }
  .main-nav {
    position: fixed;
    top: 76px;
    right: 12px;
    left: 12px;
    flex-direction: column;
    align-items: stretch;
    background: var(--glass-strong);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    padding: 14px;
    gap: 6px;
    transform: scale(0.98);
    opacity: 0;
    pointer-events: none;
    transition: 180ms ease;
  }
  .main-nav.open {
    transform: scale(1);
    opacity: 1;
    pointer-events: auto;
  }
  .main-nav > a {
    border-radius: 12px;
    background: rgba(255,255,255,0.45);
  }
  .nav-cta {
    margin-top: 8px;
    margin-left: 0;
    display: grid;
  }
}

@media (max-width: 767px) {
  body { font-size: 16px; }
  .floating-tools { bottom: 14px; right: 12px; }
  .tool-btn { width: 54px; height: 54px; }
  .section { padding: 48px 0; }
  .hero-grid h1 { font-size: clamp(1.72rem, 6.8vw, 2.2rem); }
}

@media (min-width: 1440px) {
  .container { width: min(1240px, 90vw); }
}