:root {
  --ink: #17201a;
  --muted: #5c665f;
  --paper: #fffdf8;
  --line: #e4ded2;
  --green: #176b4d;
  --green-dark: #0d4430;
  --green-soft: #e7f2ec;
  --gold: #d59b2d;
  --gold-soft: #fbf1de;
  --blue: #0a6aa6;
  --cream: #f6efe3;
  --white: #ffffff;
  --tiktok: #101418;
  --youtube: #e0122c;
  --facebook: #1877f2;
  --radius: 12px;
  --shadow-sm: 0 8px 20px rgba(23, 32, 26, 0.06);
  --shadow-md: 0 16px 36px rgba(23, 32, 26, 0.1);
  --shadow-lg: 0 26px 64px rgba(23, 32, 26, 0.16);
}

@keyframes pop-in {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  color-scheme: light;
  font-family: "Segoe UI", Arial, Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

main {
  min-height: 100vh;
  overflow-x: hidden;
}

.icon {
  flex-shrink: 0;
  color: inherit;
}

/* ---------- Topbar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
  min-height: 68px;
  padding: 10px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(23, 32, 26, 0.08);
  background: rgba(255, 253, 248, 0.92);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  font-weight: 800;
}

.brand span {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 9px;
  background: var(--green);
  color: var(--white);
  font-size: 0.92rem;
}

.topbar nav {
  display: flex;
  gap: 18px;
  justify-content: center;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 700;
}

.topbar nav a {
  transition: color 160ms ease;
}

.topbar nav a:hover {
  color: var(--green);
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.topbar__social {
  display: grid;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  place-items: center;
  border-radius: 50%;
  background: var(--cream);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, color 160ms ease;
}

.topbar__social:hover {
  transform: translateY(-2px) scale(1.06);
  box-shadow: var(--shadow-md);
}

.topbar__social:active {
  transform: scale(0.94);
}

.topbar__social--tiktok:hover {
  background: var(--tiktok);
  color: var(--white);
}

.topbar__social--youtube:hover {
  background: var(--youtube);
  color: var(--white);
}

.topbar__social--facebook:hover {
  background: var(--facebook);
  color: var(--white);
}

.topbar__call {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 132px;
  border-radius: 9px;
  padding: 11px 16px;
  background: var(--green);
  color: var(--white);
  font-weight: 800;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.topbar__call:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: var(--shadow-md);
}

.topbar__call:active {
  transform: scale(0.96);
}

/* ---------- Hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: 86vh;
  padding: clamp(28px, 6vw, 72px);
  background:
    linear-gradient(115deg, rgba(255, 253, 248, 0.96) 0%, rgba(255, 253, 248, 0.86) 52%, rgba(246, 239, 227, 0.9) 100%),
    radial-gradient(circle at 80% 18%, rgba(213, 155, 45, 0.18), transparent 26%),
    linear-gradient(135deg, #fffdf8, #edf6f1);
}

.hero__content,
.section,
.cta-section,
footer {
  width: min(1120px, calc(100vw - 40px));
  margin-inline: auto;
}

.hero__content {
  width: 100%;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0 0 14px;
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 820px;
  margin-bottom: 20px;
  font-size: clamp(2.55rem, 6vw, 5.55rem);
  line-height: 0.97;
  letter-spacing: -0.01em;
}

h2 {
  position: relative;
  margin-bottom: 22px;
  padding-bottom: 14px;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 56px;
  height: 4px;
  border-radius: 999px;
  background: var(--gold);
}

.cta-section h2::after {
  background: rgba(255, 255, 255, 0.7);
}

h3 {
  margin-bottom: 10px;
  font-size: 1.12rem;
  line-height: 1.25;
}

p {
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.7;
}

.hero__lead {
  max-width: 710px;
  color: #324038;
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  line-height: 1.65;
}

.hero__note {
  display: flex;
  gap: 10px;
  max-width: 710px;
  margin-top: 16px;
  border: 1px solid rgba(213, 155, 45, 0.4);
  border-radius: var(--radius);
  padding: 14px 16px;
  background: var(--gold-soft);
  color: #4a3c1a;
  font-size: 0.95rem;
  line-height: 1.6;
}

.hero__note .icon {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--gold);
}

.hero__note strong {
  color: var(--green-dark);
}

.hero__actions,
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.contact-button {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 188px;
  min-height: 62px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 18px;
  background: var(--white);
  box-shadow: var(--shadow-sm);
  animation: pop-in 480ms cubic-bezier(0.34, 1.56, 0.64, 1) backwards;
  transition: transform 160ms cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 160ms ease;
}

.hero__actions .contact-button:nth-child(1) { animation-delay: 60ms; }
.hero__actions .contact-button:nth-child(2) { animation-delay: 140ms; }
.hero__actions .contact-button:nth-child(3) { animation-delay: 220ms; }
.hero__actions .contact-button:nth-child(4) { animation-delay: 300ms; }

.contact-button:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-md);
}

.contact-button:active {
  transform: scale(0.97);
}

.contact-button:focus-visible,
.mobile-contact a:focus-visible,
.topbar a:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(213, 155, 45, 0.72);
  outline-offset: 3px;
}

.contact-button .icon {
  padding: 8px;
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.18);
}

.contact-button--light .icon {
  background: var(--cream);
  color: var(--green);
}

.contact-button__text {
  display: flex;
  flex-direction: column;
}

.contact-button__text em {
  font-style: normal;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  opacity: 0.85;
}

.contact-button__text strong {
  margin-top: 4px;
  font-size: 1rem;
  word-break: break-word;
}

.contact-button--primary {
  border-color: var(--green);
  background: var(--green);
  color: var(--white);
}

.contact-button--zalo {
  border-color: var(--blue);
  background: var(--blue);
  color: var(--white);
}

.contact-button--light {
  color: var(--ink);
}

.contact-button--facebook {
  border-color: var(--facebook);
  background: var(--facebook);
  color: var(--white);
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.trust-row li,
.area-list span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 14px;
  background: rgba(255, 255, 255, 0.82);
  color: #2e3b33;
  font-size: 0.93rem;
  font-weight: 700;
}

.trust-row .icon {
  color: var(--green);
}

.social-follow {
  margin-top: 30px;
  padding-top: 26px;
  border-top: 1px dashed var(--line);
}

.social-follow > p {
  margin-bottom: 12px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--ink);
}

.social-follow__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.social-pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  border-radius: 999px;
  padding: 10px 18px;
  color: var(--white);
  font-size: 0.92rem;
  font-weight: 700;
  box-shadow: var(--shadow-sm);
  transition: transform 160ms cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 160ms ease;
}

.social-pill:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: var(--shadow-md);
}

.social-pill:active {
  transform: scale(0.96);
}

.social-pill--tiktok {
  background: var(--tiktok);
}

.social-pill--youtube {
  background: var(--youtube);
}

.social-pill--facebook {
  background: var(--facebook);
}

.hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero__visual::before {
  content: "";
  position: absolute;
  inset: -18px;
  z-index: 0;
  border-radius: 22px;
  background: linear-gradient(135deg, rgba(213, 155, 45, 0.28), rgba(23, 107, 77, 0.22));
  filter: blur(2px);
}

.hero__visual img {
  position: relative;
  z-index: 1;
  width: min(560px, 100%);
  height: auto;
  border: 1px solid rgba(23, 32, 26, 0.12);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

/* ---------- Sections ---------- */

.section {
  padding: clamp(60px, 9vw, 104px) 0;
}

.section__intro {
  max-width: 780px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 28px;
}

.service-card {
  min-height: 220px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--white);
  box-shadow: var(--shadow-sm);
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.service-card:hover {
  transform: translateY(-3px);
  border-color: rgba(23, 107, 77, 0.35);
  box-shadow: var(--shadow-md);
}

.service-card__icon {
  display: grid;
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  place-items: center;
  border-radius: 10px;
  background: var(--green-soft);
  color: var(--green);
}

.service-card p {
  margin-bottom: 0;
  font-size: 0.98rem;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(28px, 6vw, 70px);
  align-items: start;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.steps {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  background: #ffffff;
  box-shadow: var(--shadow-sm);
}

.steps span {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  border-radius: 10px;
  background: var(--green);
  color: white;
  font-weight: 800;
}

.steps p {
  margin-bottom: 0;
}

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

.needs-section {
  border-top: 1px solid var(--line);
}

.needs-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 26px;
}

.needs-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 70px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  background: var(--white);
  color: var(--ink);
  font-weight: 800;
  line-height: 1.35;
}

.needs-list .icon {
  flex-shrink: 0;
  color: var(--gold);
}

.area-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.faq-section {
  border-top: 1px solid var(--line);
}

.faq-list {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow-sm);
}

summary {
  cursor: pointer;
  padding: 20px;
  font-weight: 800;
  list-style: none;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  float: right;
  content: "+";
  color: var(--green);
  font-weight: 800;
}

details[open] summary::after {
  content: "\2212";
}

details p {
  margin: 0;
  padding: 0 20px 20px;
}

.cta-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  align-items: center;
  margin-bottom: 36px;
  border-radius: var(--radius);
  padding: clamp(28px, 5vw, 52px);
  background: var(--green-dark);
  color: var(--white);
}

.cta-section p,
.cta-section .eyebrow {
  color: rgba(255, 255, 255, 0.82);
}

.cta-section h2 {
  max-width: 740px;
  margin-bottom: 12px;
}

.cta-actions {
  justify-content: flex-end;
  margin-top: 0;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--line);
  padding: 28px 0 92px;
  color: var(--muted);
}

footer strong,
footer span {
  display: block;
}

footer strong {
  color: var(--ink);
}

footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  justify-content: flex-end;
  font-weight: 700;
}

footer nav a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 160ms ease;
}

footer nav a:hover {
  color: var(--green);
}

.mobile-contact {
  position: fixed;
  right: 14px;
  bottom: 14px;
  left: 14px;
  z-index: 20;
  display: none;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 10px;
}

.mobile-contact a {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 52px;
  border-radius: var(--radius);
  background: var(--green);
  color: white;
  font-weight: 800;
  box-shadow: 0 16px 32px rgba(23, 32, 26, 0.18);
  animation: pop-in 420ms cubic-bezier(0.34, 1.56, 0.64, 1) 300ms backwards;
  transition: transform 160ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

.mobile-contact a:active {
  transform: scale(0.95);
}

.mobile-contact a:nth-child(2) {
  background: var(--blue);
  animation-delay: 380ms;
}

.mobile-contact a:nth-child(3) {
  background: var(--facebook);
  animation-delay: 460ms;
}

@media (max-width: 980px) {
  .topbar {
    grid-template-columns: 1fr auto;
  }

  .topbar nav {
    display: none;
  }

  .hero,
  .split-section,
  .cta-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero__visual {
    justify-content: flex-start;
  }

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

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

  .cta-actions {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .topbar {
    min-height: 62px;
    padding: 10px 14px;
  }

  .topbar__call span {
    display: none;
  }

  .topbar__social {
    display: none;
  }

  .brand strong {
    max-width: 108px;
    line-height: 1.12;
  }

  .hero {
    padding: 28px 20px 40px;
  }

  .hero__actions .contact-button {
    width: 100%;
  }

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

  .needs-list {
    grid-template-columns: 1fr;
  }

  .split-section {
    width: 100%;
    padding-inline: 20px;
  }

  .steps li {
    grid-template-columns: 1fr;
  }

  .cta-section {
    width: calc(100vw - 28px);
    margin-bottom: 24px;
  }

  footer {
    flex-direction: column;
    padding-bottom: 92px;
  }

  footer nav {
    justify-content: flex-start;
  }

  .mobile-contact {
    display: grid;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .contact-button,
  .service-card,
  .topbar__call,
  .topbar__social,
  .social-pill,
  .mobile-contact a {
    animation: none;
    transition: none;
  }
}