:root {
  --bg: #eef6ff;
  --bg-soft: #e3f1ff;
  --panel: rgba(255, 255, 255, 0.78);
  --panel-soft: rgba(248, 252, 255, 0.7);
  --ink: #113455;
  --text: #2f5273;
  --muted: #6585a6;
  --line: rgba(116, 163, 209, 0.34);
  --brand: #55a7f5;
  --brand-2: #8bc8ff;
  --accent: #38bdf8;
  --ok: #22c55e;
  --zalo: #0ea5e9;
  --shadow: 0 16px 36px rgba(53, 104, 156, 0.16);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --container: min(1220px, 92vw);
}

* { 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(960px 480px at -10% -10%, rgba(117, 184, 255, 0.32), transparent 60%),
    radial-gradient(860px 420px at 110% -15%, rgba(147, 207, 255, 0.28), transparent 62%),
    linear-gradient(180deg, var(--bg), var(--bg-soft));
  min-height: 100vh;
}

.site-atmos {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(44px);
  opacity: 0.35;
}

.orb-a {
  width: 460px;
  height: 460px;
  background: rgba(123, 194, 255, 0.48);
  top: -180px;
  left: -120px;
}

.orb-b {
  width: 520px;
  height: 520px;
  background: rgba(144, 215, 255, 0.36);
  right: -190px;
  top: 18%;
}

.orb-c {
  width: 430px;
  height: 430px;
  background: rgba(191, 229, 255, 0.44);
  bottom: -150px;
  left: 32%;
}

.top-alert {
  background: linear-gradient(92deg, #74b7ff, #58a8f4 56%, #87c7ff);
  color: #f8fcff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.45);
}

.top-alert-inner {
  min-height: 40px;
  display: flex;
  align-items: center;
}

.top-alert p {
  margin: 0;
  font-size: 0.82rem;
}

.top-alert a {
  color: #ffffff;
  font-weight: 800;
}

.main-flow { position: relative; z-index: 1; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: var(--container); margin: 0 auto; }
.section { padding: clamp(54px, 7vw, 94px) 0; position: relative; }
.section-compact { padding: 16px 0 0; }
.section-divider { padding: 22px 0 4px; }

.section-alt {
  background: rgba(255, 255, 255, 0.34);
  border-top: 1px solid rgba(120, 170, 220, 0.24);
  border-bottom: 1px solid rgba(120, 170, 220, 0.24);
  backdrop-filter: blur(6px);
}

.section-head { margin-bottom: 24px; }
.section-head h2 {
  margin: 0 0 10px;
  color: var(--ink);
  font-size: clamp(1.52rem, 2.3vw, 2.2rem);
  line-height: 1.3;
  letter-spacing: -0.025em;
  position: relative;
  padding-left: 18px;
}
.section-head h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  width: 7px;
  height: 1.15em;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--brand), var(--brand-2));
}
.section-head p { margin: 0; color: var(--muted); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(240, 248, 255, 0.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(129, 180, 228, 0.3);
}

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

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1rem;
  color: var(--ink);
}

.logo-dot {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  transform: rotate(45deg);
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  box-shadow: 0 0 0 7px rgba(112, 181, 246, 0.22);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.main-nav > a {
  padding: 8px 10px;
  border-radius: 999px;
  color: #386189;
  font-weight: 600;
  font-size: 0.88rem;
  transition: 220ms ease;
  border: 1px solid transparent;
}

.main-nav > a:hover,
.main-nav > a.active {
  color: #0f3658;
  border-color: rgba(107, 171, 234, 0.58);
  background: rgba(180, 223, 255, 0.45);
}

.nav-cta {
  display: inline-flex;
  gap: 8px;
  margin-left: 6px;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid rgba(122, 180, 236, 0.5);
  background: rgba(255, 255, 255, 0.65);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  background: #2d597f;
  border-radius: 5px;
}

.hero-block {
  padding: clamp(20px, 4vw, 38px) 0 clamp(18px, 3vw, 24px);
}

.info-ribbon {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}

.info-ribbon p {
  margin: 0;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid rgba(123, 185, 241, 0.5);
  background: rgba(255, 255, 255, 0.64);
  color: #345f87;
  font-size: 0.88rem;
}

.info-ribbon strong { color: #2e6fa6; }

.hero-shell {
  display: grid;
  gap: 20px;
  background: linear-gradient(145deg, rgba(255,255,255,0.72), rgba(243,250,255,0.62));
  border: 1px solid rgba(126, 184, 237, 0.46);
  border-radius: var(--radius-lg);
  padding: clamp(18px, 3vw, 30px);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  position: relative;
}

.hero-shell::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(130deg, transparent 0%, transparent 72%, rgba(141, 201, 255, 0.18) 72%, rgba(141, 201, 255, 0.18) 100%);
  pointer-events: none;
}

.hero-copy h1 {
  margin: 0 0 14px;
  color: #143b5f;
  font-size: clamp(1.94rem, 4.2vw, 3.2rem);
  line-height: 1.14;
  letter-spacing: -0.03em;
}

.hero-copy p {
  margin: 0;
  color: #406690;
  max-width: 62ch;
}

.hero-kicker {
  display: inline-flex;
  margin-bottom: 10px;
  padding: 5px 11px;
  border-radius: 999px;
  background: rgba(176, 222, 255, 0.44);
  border: 1px solid rgba(123, 183, 242, 0.6);
  color: #2f6fa6;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.hero-actions {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-points {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.hero-points li {
  position: relative;
  padding-left: 22px;
  color: #376086;
  font-weight: 500;
}

.hero-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
}

.hero-stage {
  display: grid;
  gap: 12px;
}

.hero-frame {
  position: relative;
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid rgba(123, 186, 244, 0.5);
  background: rgba(229, 243, 255, 0.78);
}

.hero-frame img {
  width: 100%;
  aspect-ratio: 16 / 11;
  object-fit: cover;
}

.hero-badge {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 12px;
  border-radius: 10px;
  padding: 10px 12px;
  background: rgba(25, 66, 102, 0.74);
  border: 1px solid rgba(175, 217, 251, 0.55);
  color: #f4fbff;
  display: grid;
  gap: 2px;
}

.hero-badge strong { font-size: 1.05rem; line-height: 1.2; }
.hero-badge span { font-size: 0.85rem; color: #d8efff; }

.hero-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.hero-strip article {
  border-radius: 10px;
  padding: 10px;
  border: 1px solid rgba(126, 186, 241, 0.46);
  background: rgba(255, 255, 255, 0.6);
  text-align: center;
}

.hero-strip strong {
  display: block;
  color: #2d6ca2;
  font-size: 1.05rem;
  line-height: 1.2;
}

.hero-strip span {
  color: #4e7398;
  font-size: 0.79rem;
}

.hero-tail {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px dashed rgba(122, 184, 243, 0.62);
  background: rgba(255, 255, 255, 0.5);
}

.hero-tail p { margin: 0; color: #3f698f; }

.divider-line {
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, transparent, rgba(126, 186, 243, 0.8), transparent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 12px 17px;
  font-weight: 600;
  font-size: 0.94rem;
  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: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
}

.btn-zalo {
  background: linear-gradient(135deg, #2c9aee, var(--zalo));
  color: #fff;
}

.btn-ghost {
  background: rgba(255,255,255,0.6);
  border-color: rgba(123,183,242,0.48);
  color: #2f5d86;
}

.glass-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.68), rgba(241,249,255,0.62));
  border: 1px solid rgba(122, 181, 236, 0.42);
  border-radius: 14px;
  box-shadow: var(--shadow);
  padding: 20px;
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
  border-top: 3px solid rgba(117, 182, 246, 0.76);
  transition: transform 260ms ease, box-shadow 260ms ease;
}

.glass-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 88px;
  height: 88px;
  background: radial-gradient(circle at 100% 0, rgba(151, 212, 255, 0.32), transparent 66%);
  pointer-events: none;
}

.glass-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 36px rgba(68, 121, 172, 0.22);
}

.glass-card h3 { margin: 0 0 10px; font-size: 1.12rem; color: #1e4f78; }
.glass-card p { margin: 0; color: #426b92; }

.card-photo {
  margin: -20px -20px 14px;
  border-radius: 12px 12px 0 0;
  overflow: hidden;
  border-bottom: 1px solid rgba(122, 184, 243, 0.4);
}

.card-photo img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transform: scale(1.01);
  transition: transform 280ms ease;
}

.glass-card:hover .card-photo img { transform: scale(1.05); }

.inline-photo {
  margin: 14px 0 6px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(122, 181, 236, 0.45);
  box-shadow: var(--shadow);
  background: rgba(235, 247, 255, 0.8);
}

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

.card-grid { display: grid; gap: 22px; grid-template-columns: 1fr; }
.faq-grid { display: grid; gap: 18px; }

.text-link {
  display: inline-flex;
  margin-top: 12px;
  color: #2f79b8;
  font-weight: 700;
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.card-actions .btn { flex: 1 1 120px; padding: 10px 12px; }

.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: rgba(255,255,255,0.56);
  border: 1px solid rgba(122, 183, 242, 0.4);
  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 rgba(122, 182, 238, 0.42);
  background: rgba(255,255,255,0.62);
  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(122, 181, 236, 0.3);
  vertical-align: top;
  color: #3d6690;
}

table th {
  background: rgba(165, 214, 255, 0.4);
  color: #1e527d;
  font-weight: 700;
}

.faq-item {
  background: rgba(255,255,255,0.62);
  border: 1px solid rgba(122, 181, 236, 0.42);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  color: #25567f;
}

.faq-item p { margin: 12px 0 0; color: #436d97; }

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

.article-wrap h2 {
  margin: 18px 0 8px;
  font-size: clamp(1.35rem, 2vw, 1.8rem);
  color: #1f527b;
}

.article-wrap h3 {
  margin: 12px 0 6px;
  font-size: clamp(1.08rem, 1.5vw, 1.25rem);
  color: #2c608b;
}

.article-wrap p { margin: 0; color: #476f99; }

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 8px 0 12px;
  color: var(--muted);
  font-size: 0.86rem;
}

.breadcrumb a { color: #3b7eb7; font-weight: 600; }

.cta-band { padding: clamp(38px, 6vw, 58px) 0; }

.cta-inner {
  display: grid;
  gap: 14px;
  align-items: center;
  background: linear-gradient(120deg, #5aaef5 0%, #7cc2ff 58%, #91cdff 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,0.5);
  padding: 28px;
}

.cta-inner h2 { margin: 0 0 8px; color: #fff; }
.cta-inner p { margin: 0; color: rgba(245, 252, 255, 0.96); }

.quick-contact {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px;
  border-radius: 12px;
  border: 1px solid rgba(122, 181, 236, 0.4);
  background: rgba(255,255,255,0.55);
  backdrop-filter: blur(8px);
}

.contact-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.contact-list.big li {
  background: rgba(255,255,255,0.55);
  border: 1px solid rgba(122, 181, 236, 0.4);
  border-radius: 10px;
  padding: 10px 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(122, 181, 236, 0.56);
  border-radius: 12px;
  padding: 12px 14px;
  background: rgba(255,255,255,0.68);
  color: #29557f;
}

input::placeholder,
textarea::placeholder { color: #6790b7; }

textarea { resize: vertical; }

.form-message {
  min-height: 24px;
  margin: 6px 0 0;
  color: #2f75af;
  font-weight: 600;
}

.map-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(122, 181, 236, 0.42);
  box-shadow: var(--shadow);
}

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

.site-footer {
  margin-top: 36px;
  background: linear-gradient(165deg, #4d9fe0, #5baef2);
  color: #f4fbff;
  border-top: 1px solid rgba(255,255,255,0.55);
}

.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: #ffffff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.36);
  text-align: center;
  padding: 14px 0;
  font-size: 0.9rem;
}

.floating-tools {
  position: fixed;
  right: 14px;
  bottom: 14px;
  display: grid;
  gap: 10px;
  z-index: 82;
}

.tool-btn {
  position: relative;
  width: 56px;
  height: 56px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  box-shadow: var(--shadow);
  isolation: isolate;
  border: 1px solid rgba(255,255,255,0.68);
}

.tool-btn::before {
  content: "";
  position: absolute;
  inset: -7px;
  border-radius: 999px;
  border: 2px solid rgba(122, 181, 236, 0.55);
  opacity: 0;
  transform: scale(0.75);
  animation: pulseRing 1.8s ease-out infinite;
  z-index: -1;
}

.tool-btn.call { background: linear-gradient(135deg, var(--brand), var(--brand-2)); }
.tool-btn.zalo { background: linear-gradient(135deg, #2e9be9, var(--zalo)); }
.tool-btn.call::before { border-color: rgba(132, 193, 249, 0.62); animation-delay: 0.15s; }
.tool-btn.zalo::before { border-color: rgba(52, 165, 243, 0.6); }

@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-shell { grid-template-columns: 1.05fr 0.95fr; align-items: stretch; }
  .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: 72px;
    right: 12px;
    left: 12px;
    flex-direction: column;
    align-items: stretch;
    background: rgba(243, 250, 255, 0.95);
    border: 1px solid rgba(122, 181, 236, 0.48);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    backdrop-filter: blur(14px);
    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(255,255,255,0.78);
    border: 1px solid rgba(122,181,236,0.46);
  }
  .nav-cta {
    margin-top: 8px;
    margin-left: 0;
    display: grid;
  }
}

@media (max-width: 767px) {
  body { font-size: 16px; }
  .top-alert p { font-size: 0.8rem; }
  .floating-tools { bottom: 12px; right: 10px; }
  .tool-btn { width: 54px; height: 54px; }
  .section { padding: 40px 0; }
  .hero-copy h1 { font-size: clamp(1.72rem, 6.8vw, 2.2rem); }
  .hero-strip { grid-template-columns: 1fr; }
  .hero-strip article { text-align: left; }
  .btn { width: 100%; }
  .hero-shell { padding: 16px; border-radius: 18px; }
  .section-head h2 { font-size: clamp(1.36rem, 5.5vw, 1.78rem); }
}

@media (max-width: 420px) {
  .container { width: min(1220px, 94vw); }
  .header-inner { min-height: 70px; }
  .site-header { backdrop-filter: blur(10px); }
  .hero-actions { gap: 10px; }
}

@media (min-width: 1440px) {
  .container { width: min(1260px, 90vw); }
}