:root {
  --orange: #ff6a00;
  --orange-dark: #e55a00;
  --black: #111111;
  --ink: #1d1d1f;
  --muted: #6b6b73;
  --soft: #fff4ec;
  --line: #ececf0;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(17, 17, 17, .08);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  margin: 0;
  font-family: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
p { margin: 0 0 1em; }

.container { width: min(1160px, 92%); margin-inline: auto; }
.container--narrow { width: min(820px, 92%); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  padding: .7rem 1.2rem; border-radius: 999px; border: 2px solid transparent;
  font: inherit; font-weight: 700; cursor: pointer; transition: .2s;
}
.btn svg { width: 20px; height: 20px; fill: currentColor; }
.btn--primary { background: var(--orange); color: #fff; box-shadow: 0 8px 20px rgba(255, 106, 0, .35); }
.btn--primary:hover { background: var(--orange-dark); transform: translateY(-1px); }
.btn--ghost { border-color: rgba(255, 255, 255, .5); color: #fff; }
.btn--ghost:hover { background: #fff; color: var(--black); }
.btn--dark { background: var(--black); color: #fff; }
.btn--dark:hover { background: #000; transform: translateY(-1px); }
.btn--lg { padding: .95rem 1.6rem; font-size: 1.05rem; }
.btn--block { width: 100%; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(17, 17, 17, .96); backdrop-filter: blur(8px); color: #fff;
}
.header__inner { display: flex; align-items: center; gap: 1.5rem; height: 68px; }
.logo { display: flex; align-items: center; gap: .6rem; }
.logo__mark {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 12px;
  background: var(--orange); color: #fff; font-weight: 800; font-size: 1.3rem;
}
.logo__text { display: flex; flex-direction: column; font-weight: 800; font-size: 1.2rem; line-height: 1.1; }
.logo__text small { font-size: .65rem; font-weight: 500; color: #bbb; letter-spacing: .04em; }
.nav { display: flex; gap: 1.4rem; margin-left: auto; font-weight: 500; font-size: .95rem; }
.nav a { color: #ddd; transition: color .2s; }
.nav a:hover { color: var(--orange); }
.header__call { padding: .55rem 1rem; }
.burger { display: none; background: none; border: 0; width: 40px; height: 40px; cursor: pointer; padding: 8px; }
.burger span { display: block; height: 2px; background: #fff; margin: 6px 0; transition: .2s; }

/* Hero */
.hero {
  background:
    radial-gradient(900px 400px at 85% 0%, rgba(255, 106, 0, .35), transparent 60%),
    linear-gradient(135deg, #111 0%, #1c1c1f 100%);
  color: #fff; padding: 4.5rem 0 5rem;
}
.hero__inner { display: grid; grid-template-columns: 1.2fr .8fr; gap: 3rem; align-items: center; }
.badge {
  display: inline-block; padding: .35rem .9rem; border-radius: 999px;
  background: rgba(255, 106, 0, .15); color: #ffb27a; font-size: .85rem; font-weight: 600; margin-bottom: 1.2rem;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 800; }
.hero h1 em { font-style: normal; color: var(--orange); }
.hero p { color: #cfcfd6; font-size: 1.1rem; max-width: 540px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: .8rem; margin: 1.6rem 0 2rem; }
.hero__stats { display: flex; gap: 2rem; list-style: none; padding: 0; margin: 0; }
.hero__stats strong { display: block; font-size: 1.6rem; color: var(--orange); }
.hero__stats span { font-size: .85rem; color: #aaa; }
.hero__card {
  background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 24px; padding: 1.8rem;
}
.route__row { display: flex; gap: 1rem; align-items: center; }
.route__row small { display: block; color: #999; font-size: .8rem; }
.route__row b { font-size: 1.05rem; }
.dot { width: 16px; height: 16px; border-radius: 50%; border: 4px solid var(--orange); flex: none; }
.dot--end { background: var(--orange); }
.route__line { width: 2px; height: 36px; margin: 6px 7px; background: repeating-linear-gradient(var(--orange) 0 6px, transparent 6px 12px); }
.route__tags { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.4rem; }
.route__tags span { padding: .3rem .8rem; border-radius: 999px; background: rgba(255, 255, 255, .1); font-size: .85rem; }

/* Sections */
.section { padding: 4.5rem 0; }
.section--soft { background: var(--soft); }
.section--dark { background: var(--black); color: #fff; }
.section__head { text-align: center; max-width: 680px; margin: 0 auto 2.5rem; }
.section__head h2, .contact h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); font-weight: 800; }
.eyebrow {
  display: inline-block; color: var(--orange); font-weight: 700; font-size: .85rem;
  text-transform: uppercase; letter-spacing: .12em; margin-bottom: .6rem;
}

.grid { display: grid; gap: 1.4rem; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem; transition: .25s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--orange); }
.card__icon {
  display: grid; place-items: center; width: 52px; height: 52px; border-radius: 14px;
  background: var(--soft); font-size: 1.5rem; margin-bottom: 1rem;
}
.card h3 { font-size: 1.15rem; }
.card p { color: var(--muted); margin: 0; }

.dest { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.dest__item {
  display: flex; flex-direction: column; justify-content: flex-end; min-height: 150px;
  padding: 1.4rem; border-radius: var(--radius);
  background: linear-gradient(160deg, #26262a, #18181b); border: 1px solid #2e2e33; transition: .25s;
}
.dest__item span { color: var(--orange); font-size: .85rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; }
.dest__item b { font-size: 1.1rem; }
.dest__item:hover { border-color: var(--orange); transform: translateY(-3px); background: linear-gradient(160deg, #3a2314, #1c1c1f); }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.4rem; list-style: none; padding: 0; margin: 0; }
.steps li { position: relative; padding: 1.6rem; border-radius: var(--radius); background: var(--soft); }
.steps b {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%;
  background: var(--orange); color: #fff; margin-bottom: 1rem; font-size: 1.1rem;
}
.steps h3 { font-size: 1.1rem; }
.steps p { color: var(--muted); margin: 0; }

.feature { background: #fff; border-radius: var(--radius); padding: 1.5rem; border-left: 4px solid var(--orange); }
.feature h3 { font-size: 1.1rem; }
.feature p { color: var(--muted); margin: 0; }

.cta { background: var(--orange); color: #fff; text-align: center; padding: 3.5rem 0; }
.cta h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); font-weight: 800; }
.cta p { margin-bottom: 1.4rem; font-size: 1.1rem; }

.faq { border: 1px solid var(--line); border-radius: 12px; padding: 1rem 1.2rem; margin-bottom: .8rem; }
.faq summary { cursor: pointer; font-weight: 700; list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--orange); font-size: 1.4rem; line-height: 1; }
.faq[open] summary::after { content: "–"; }
.faq p { margin: .8rem 0 0; color: var(--muted); }

/* Contact */
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }
.contact__info p { color: #bbb; }
.contact__phone { display: block; font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; color: var(--orange); margin: .5rem 0 1.2rem; }
.form { background: #fff; color: var(--ink); border-radius: 20px; padding: 1.8rem; display: grid; gap: 1rem; }
.form label { display: grid; gap: .35rem; font-weight: 600; font-size: .9rem; }
.form__row { display: grid; grid-template-columns: 1fr 110px; gap: 1rem; }
.form input, .form textarea {
  font: inherit; padding: .7rem .9rem; border: 1px solid #d9d9e0; border-radius: 10px; width: 100%;
}
.form input:focus, .form textarea:focus { outline: 2px solid var(--orange); border-color: transparent; }
.form .invalid { border-color: #d92d20; }
.form__msg { margin: 0; font-size: .9rem; min-height: 1.2em; color: var(--muted); }
.form__msg.error { color: #d92d20; }

/* Footer */
.footer { background: #0a0a0a; color: #aaa; padding: 1.6rem 0; font-size: .9rem; }
.footer__inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .6rem; }
.footer b, .footer a { color: #fff; }

/* Floating buttons */
.fab { position: fixed; right: 16px; bottom: 16px; z-index: 60; display: flex; flex-direction: column; gap: 10px; }
.fab__btn {
  display: grid; place-items: center; width: 56px; height: 56px; border-radius: 50%;
  color: #fff; font-weight: 800; font-size: .85rem; box-shadow: 0 8px 20px rgba(0, 0, 0, .3);
}
.fab__btn--zalo { background: #0068ff; }
.fab__btn--call { background: var(--orange); animation: ring 2s infinite; }
.fab__btn svg { width: 26px; height: 26px; fill: #fff; }
@keyframes ring {
  0% { box-shadow: 0 0 0 0 rgba(255, 106, 0, .6); }
  70% { box-shadow: 0 0 0 16px rgba(255, 106, 0, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 106, 0, 0); }
}

/* Responsive */
@media (max-width: 960px) {
  .hero__inner, .contact { grid-template-columns: 1fr; }
  .grid--3, .dest { grid-template-columns: repeat(2, 1fr); }
  .grid--4, .steps { grid-template-columns: repeat(2, 1fr); }
  .burger { display: block; margin-left: auto; }
  .header__call { display: none; }
  .nav {
    position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: #111; padding: .5rem 4%; display: none; margin: 0;
  }
  .nav.open { display: flex; }
  .nav a { padding: .8rem 0; border-bottom: 1px solid #222; }
}
@media (max-width: 600px) {
  .section { padding: 3rem 0; }
  .grid--3, .grid--4, .dest, .steps { grid-template-columns: 1fr; }
  .hero { padding: 3rem 0; }
  .hero__stats { gap: 1.2rem; }
  .hero__actions .btn { flex: 1 1 100%; }
  .form__row { grid-template-columns: 1fr 90px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fab__btn--call { animation: none; }
  * { transition: none !important; }
}