@font-face {
  font-family: "NotoSerif-Regular";
  src: url("NotoSerif-Regular.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

:root {
  color-scheme: light;
  --page-background: #efe9db;
}

* {
  box-sizing: border-box;
}

.js-enabled .scroll-reveal {
  opacity: 0;
  transform: translateY(clamp(1.25rem, 3vw, 3.5rem));
  transition:
    opacity 850ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 850ms cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}

.js-enabled .scroll-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

html {
  background: var(--page-background);
  font-size: 115.625%;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--page-background);
  font-family: "NotoSerif-Regular", "Noto Serif", Georgia, serif;
}

button,
input,
select,
textarea,
svg text {
  font-family: "NotoSerif-Regular", "Noto Serif", Georgia, serif;
}

main,
.hero {
  width: 100%;
}

.hero {
  position: relative;
  overflow: hidden;
  background: #c5582f;
  isolation: isolate;
}

.hero__background {
  display: block;
  width: 100%;
  height: auto;
}

.hero__plane,
.hero__clouds {
  position: absolute;
  pointer-events: none;
  will-change: transform;
  backface-visibility: hidden;
}

.hero__plane {
  z-index: 2;
  top: 30%;
  left: 20.08%;
  width: 59.84%;
  height: auto;
  transform-origin: 52% 61%;
  filter: drop-shadow(0 0.7rem 0.9rem rgba(91, 43, 27, 0.16));
  animation: plane-flight 12s linear infinite;
}

.hero__plane--one {
  animation-delay: -1s;
}

.hero__plane--two {
  animation-delay: -7s;
}

.hero__clouds {
  left: -8%;
  width: 116%;
  height: auto;
  object-fit: contain;
  -webkit-mask-image: linear-gradient(to bottom, #000 0 76%, transparent 98%);
  mask-image: linear-gradient(to bottom, #000 0 76%, transparent 98%);
}

.hero__clouds--far {
  z-index: 1;
  top: 19%;
  opacity: 0.36;
  filter: blur(1px);
  animation: cloud-drift-far 20s ease-in-out infinite alternate;
}

.hero__clouds--near {
  z-index: 3;
  top: 31%;
  opacity: 0.26;
  filter: blur(1.25px);
  animation: cloud-drift-near 14s ease-in-out infinite alternate;
}

@keyframes plane-flight {
  0% {
    opacity: 0;
    transform: translate3d(139%, 0, 0);
  }

  0.5% {
    opacity: 1;
    transform: translate3d(139%, 0, 0);
  }

  49% {
    opacity: 1;
    transform: translate3d(-139%, -1.2%, 0);
  }

  49.5% {
    opacity: 0;
    transform: translate3d(-139%, -1.2%, 0);
  }

  50%,
  100% {
    opacity: 0;
    transform: translate3d(139%, 0, 0);
  }
}

@keyframes cloud-drift-near {
  from {
    transform: translate3d(9%, 0.6%, 0);
  }

  to {
    transform: translate3d(-9%, -0.7%, 0);
  }
}

@keyframes cloud-drift-far {
  from {
    transform: translate3d(-6%, -0.35%, 0);
  }

  to {
    transform: translate3d(6%, 0.45%, 0);
  }
}

.story-section {
  padding: 0;
  background: var(--page-background);
}

.aspiration {
  position: relative;
  padding-top: clamp(1rem, 2vw, 2.5rem);
}

.aspiration::before {
  content: "";
  position: absolute;
  z-index: 1;
  top: 0;
  right: 0;
  left: 0;
  height: clamp(1rem, 2vw, 2.5rem);
  background: linear-gradient(
    to bottom,
    #f5efe4 0%,
    #f2eadb 48%,
    var(--page-background) 100%
  );
  pointer-events: none;
}

.aspiration > * {
  position: relative;
  z-index: 2;
}

.section-heading {
  display: block;
  width: 100%;
  height: auto;
}

.story-copy {
  width: min(35%, 720px);
  margin: clamp(0.75rem, 1.8vw, 2rem) auto clamp(2rem, 4vw, 4.5rem);
  color: #514942;
  font-family: "NotoSerif-Regular", "Noto Serif", Georgia, serif;
  font-size: clamp(
    calc(0.78rem + 3px),
    calc(0.92vw + 3px),
    calc(1.2rem + 3px)
  );
  line-height: 1.55;
  text-align: justify;
}

.journey {
  padding-top: clamp(1rem, 2vw, 2.5rem);
  background: var(--page-background);
}

.journey > .section-heading {
  margin-bottom: clamp(1rem, 2vw, 2.5rem);
}

.network {
  background: var(--page-background);
}

.network__heading-wrap {
  position: relative;
  overflow: hidden;
  background: var(--page-background);
}

.network__heading-wrap::before,
.network__heading-wrap::after {
  content: "";
  position: absolute;
  z-index: 1;
  left: 0;
  width: 100%;
  height: clamp(14px, 1.8vw, 42px);
  pointer-events: none;
}

.network__heading-wrap::before {
  top: 0;
  background: linear-gradient(to bottom, var(--page-background) 0%, rgba(239, 233, 219, 0) 100%);
}

.network__heading-wrap::after {
  bottom: 0;
  background: linear-gradient(to top, var(--page-background) 0%, rgba(239, 233, 219, 0) 100%);
}

.network__heading-wrap .section-heading {
  position: relative;
  z-index: 0;
}

.wings {
  position: relative;
  padding-top: clamp(1rem, 2vw, 2.5rem);
  background: var(--page-background);
}

.wings::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: clamp(1rem, 2vw, 2.5rem);
  background: var(--page-background);
  pointer-events: none;
}

.resort {
  position: relative;
  padding-top: clamp(1rem, 2vw, 2.5rem);
  background: var(--page-background);
}

.resort::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: clamp(1rem, 2vw, 2.5rem);
  background: var(--page-background);
  pointer-events: none;
}

.ambassadors {
  overflow: hidden;
  background: var(--page-background);
}

.ecosystem {
  background: var(--page-background);
}

.interactive-label {
  width: min(34%, 700px);
  margin: clamp(0.5rem, 1vw, 1.25rem) auto clamp(1.25rem, 2.5vw, 3rem);
  padding: clamp(0.45rem, 0.7vw, 0.8rem) 1rem;
  border: 1px solid #bba88f;
  background: #d9c4a8;
  color: #3b3028;
  font-family: "NotoSerif-Regular", "Noto Serif", Georgia, serif;
  font-size: clamp(0.58rem, 0.7vw, 0.85rem);
  font-weight: 700;
  text-align: center;
}

.journey__copy {
  margin-bottom: clamp(1.5rem, 3vw, 3.5rem);
}

.journey__copy p {
  margin: 0 0 1.15em;
}

.journey__copy p:last-child {
  margin-bottom: 0;
}

.journey__feature {
  display: block;
  width: 100%;
  height: auto;
}

/* Bảng số liệu hàng không */
.aviation-stats {
  --aviation-yellow: #f1c020;
  --aviation-red: #ca3337;
  position: relative;
  isolation: isolate;
  padding: 0;
  overflow: hidden;
  color: #514942;
  font-family: "NotoSerif-Regular", "Noto Serif", Georgia, serif;
  background: var(--page-background);
}

.aviation-stats__wrap {
  width: min(735px, calc(100% - 1rem));
  margin: 0 auto;
}

.aviation-stats__image {
  display: block;
  width: 100%;
  height: auto;
  margin: 0;
}

.aviation-stats__hero-grid,
.aviation-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(0.5rem, 0.9vw, 0.75rem);
}

.aviation-stats__hero-grid {
  margin-bottom: clamp(0.5rem, 0.9vw, 0.75rem);
}

.aviation-stats__card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: clamp(1rem, 1.8vw, 1.4rem);
  background: var(--aviation-red);
  box-shadow: 0 14px 34px rgba(91, 35, 30, 0.16), inset 0 1px 0 rgba(255, 255, 255, 0.18);
  text-align: center;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: opacity 700ms ease, transform 350ms ease, box-shadow 350ms ease, background-color 350ms ease;
}

.js-enabled .aviation-stats__card {
  opacity: 0;
  transform: translateY(1.25rem);
}

.js-enabled .aviation-stats__card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.js-enabled .aviation-stats__card.is-visible:hover,
.aviation-stats__card:hover {
  transform: translateY(-4px);
  background: var(--aviation-red);
  box-shadow: 0 20px 44px rgba(91, 35, 30, 0.22), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.aviation-stats__hero-card {
  min-height: 93px;
  padding: clamp(0.6rem, 0.975vw, 0.75rem);
}

.aviation-stats__cell {
  min-height: 72px;
  padding: clamp(0.5625rem, 0.9vw, 0.75rem);
}

.aviation-stats__big-number,
.aviation-stats__title,
.aviation-stats__otp-title {
  color: #fff;
  font-family: "NotoSerif-Regular", "Noto Serif", Georgia, serif;
  line-height: 1;
  letter-spacing: 0.01em;
  text-shadow: none;
}

.aviation-count {
  color: var(--aviation-yellow);
  font-size: 1.28em;
  font-weight: 700;
  line-height: 0.8;
  text-shadow: 0 2px 0 rgba(91, 24, 22, 0.28);
}

.aviation-stats__big-number {
  margin-bottom: 0.5rem;
  font-size: clamp(calc(1.7rem - 2px), calc(3.7vw - 2px), calc(2.95rem - 2px));
  white-space: nowrap;
}

.aviation-stats__title {
  margin-bottom: 0.5rem;
  font-size: clamp(calc(1.4rem - 2px), calc(3.15vw - 2px), calc(2.45rem - 2px));
  white-space: nowrap;
}

.aviation-stats__otp {
  grid-column: 1 / -1;
  min-height: 85px;
  margin-top: clamp(0.5rem, 0.9vw, 0.75rem);
  padding: clamp(0.675rem, 1.125vw, 0.8625rem);
  overflow: hidden;
}

.aviation-stats__otp::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 0%, rgba(241, 192, 32, 0.12) 45%, transparent 72%);
  transform: translateX(-120%);
  animation: aviation-stats-shine 5s ease-in-out infinite 1.5s;
  pointer-events: none;
}

.aviation-stats__otp-title {
  margin-bottom: 0.65rem;
  font-size: clamp(calc(1.5rem - 2px), calc(3.25vw - 2px), calc(2.55rem - 2px));
}

.aviation-stats__suffix,
.aviation-stats__unit {
  color: #fff;
  font-family: "NotoSerif-Regular", "Noto Serif", Georgia, serif;
  font-size: 0.56em;
}

.aviation-stats__period,
.aviation-stats__subtitle {
  color: #fff;
  margin-bottom: 0.55rem;
  font-size: clamp(calc(0.72rem - 2px), calc(1.05vw - 2px), calc(0.88rem - 2px));
  font-weight: 600;
}

.aviation-stats__desc,
.aviation-stats__otp-desc {
  color: #fff;
  max-width: 52rem;
  margin: 0 auto;
  font-size: clamp(calc(0.72rem - 2px), calc(0.95vw - 2px), calc(0.86rem - 2px));
  line-height: 1.48;
}

.aviation-stats__alert {
  font-weight: 400;
}

@keyframes aviation-stats-shine {
  0%, 72%, 100% { transform: translateX(-120%); }
  88% { transform: translateX(120%); }
}

@media (max-width: 760px) {
  .aviation-stats {
    padding: 0;
    background: var(--page-background);
  }

  .aviation-stats__hero-grid,
  .aviation-stats__grid {
    grid-template-columns: 1fr;
  }

  .aviation-stats__otp {
    grid-column: 1;
  }

  .aviation-stats__big-number,
  .aviation-stats__title {
    white-space: normal;
  }
}

.milestone-timeline {
  padding: clamp(2.8rem, 5vw, 5rem) clamp(1rem, 4vw, 3rem) clamp(3rem, 5vw, 5rem);
  background:
    radial-gradient(circle at 50% 8%, rgba(226, 188, 72, 0.13), transparent 26rem),
    var(--page-background);
  font-family: "NotoSerif-Regular", "Noto Serif", Georgia, serif;
}

.milestone-timeline__header {
  width: min(96%, 1200px);
  margin: 0 auto clamp(1.8rem, 3vw, 3rem);
  text-align: center;
}

.milestone-timeline__header h3 {
  margin: 0;
  background: linear-gradient(100deg, #ad332b 0%, #c7794f 100%);
  background-clip: text;
  color: transparent;
  font-family: "NotoSerif-Regular", "Noto Serif", Georgia, serif;
  font-size: clamp(0.9rem, 3vw, 3.35rem);
  font-weight: 500;
  line-height: 1.3;
  padding-bottom: 0.12em;
  white-space: nowrap;
  letter-spacing: 0.018em;
  font-synthesis: none;
  text-rendering: geometricPrecision;
  -webkit-font-smoothing: antialiased;
}

.timeline {
  --timeline-row: clamp(13rem, 14vw, 14rem);
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: var(--timeline-row);
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: 0;
  column-gap: 0;
  row-gap: 0;
  list-style: none;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(to bottom, #f4df9d, #e2bc48 8%, #e2bc48 92%, #f4df9d);
  transform: translateX(-50%);
}

.tl-item {
  position: relative;
  width: 100%;
  padding: 0 clamp(2rem, 3vw, 2.8rem) clamp(0.6rem, 1.2vw, 1rem) 0;
  text-align: right;
}

.tl-item:nth-child(even) {
  left: 0;
  margin-top: calc(var(--timeline-row) / 2);
  padding-right: 0;
  padding-left: clamp(2rem, 3vw, 2.8rem);
  text-align: left;
}

.tl-node {
  position: absolute;
  z-index: 2;
  top: -0.4rem;
  right: -1.05rem;
  display: grid;
  width: 2.1rem;
  aspect-ratio: 1;
  place-items: center;
  border: 2px solid #e2bc48;
  border-radius: 50%;
  background: #fff url("https://cafefcdn.com/203337114487263232/2026/8/25/bong-hoa-1787663775660376801787.png") center / 102% no-repeat;
  color: transparent;
  box-shadow: 0 0 0 5px var(--page-background), 0 4px 12px rgba(122, 26, 32, 0.22);
  font-size: 0;
  line-height: 1;
  transition: transform 260ms ease, box-shadow 260ms ease;
}

.tl-item:nth-child(even) .tl-node {
  right: auto;
  left: -1.05rem;
}

.tl-card {
  width: min(100%, 500px);
  margin: 0;
  padding: clamp(1rem, 1.7vw, 1.4rem);
  appearance: none;
  border: 1px solid #ded1bd;
  border-radius: 0.9rem;
  background: rgba(250, 244, 232, 0.94);
  box-shadow: 0 0.65rem 1.8rem rgba(122, 26, 32, 0.08);
  color: inherit;
  font: inherit;
  text-align: inherit;
  cursor: pointer;
  transition: border-color 260ms ease, box-shadow 260ms ease, transform 260ms ease;
}

.tl-date {
  display: inline-block;
  margin-bottom: 0.65rem;
  padding: 0.32rem 0.8rem;
  border-radius: 999px;
  background: #a3242b;
  color: #fff8ec;
  font-family: "NotoSerif-Regular", "Noto Serif", Georgia, serif;
  font-size: clamp(0.82rem, 0.9vw, 0.98rem);
  font-weight: 400;
  letter-spacing: 0.015em;
}

.tl-desc {
  display: block;
  color: #514942;
  font-family: "NotoSerif-Regular", "Noto Serif", Georgia, serif;
  font-size: clamp(0.94rem, 1.08vw, 1.12rem);
  line-height: 1.58;
}

.tl-item:hover .tl-node,
.tl-item.is-active .tl-node {
  transform: scale(1.22) rotate(12deg);
  box-shadow: 0 0 0 5px var(--page-background), 0 6px 18px rgba(122, 26, 32, 0.34);
}

.tl-card:hover,
.tl-card:focus-visible,
.tl-item.is-active .tl-card {
  border-color: #e2bc48;
  box-shadow: 0 1rem 2.5rem rgba(122, 26, 32, 0.16);
  transform: translateY(-3px);
}

.tl-card:focus-visible {
  outline: 2px solid #a3242b;
  outline-offset: 4px;
}

.network__feature {
  display: block;
  width: 100%;
  height: auto;
}

.wings__copy p {
  margin: 0 0 1.15em;
}

.wings__copy p:last-child {
  margin-bottom: 0;
}

.wings__image {
  display: block;
  width: 100%;
  height: auto;
}

.wings__copy--middle,
.wings__copy--boeing {
  margin-top: clamp(2rem, 4vw, 4.5rem);
}

.ambassadors__visual {
  position: relative;
  z-index: 1;
}

.ambassadors__visual::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -12rem;
  left: 0;
  z-index: 2;
  height: 14rem;
  background: linear-gradient(
    to bottom,
    rgba(244, 234, 215, 0) 0%,
    rgba(244, 234, 215, 0) 4%,
    #f7efdf 14%,
    #f2e8d6 55%,
    var(--page-background) 100%
  );
  pointer-events: none;
}

.ambassadors__image {
  display: block;
  width: 100%;
  height: auto;
}

.ambassadors__copy {
  position: relative;
  z-index: 3;
  margin-top: clamp(1.5rem, 3vw, 3.5rem);
}

.ambassadors__copy p {
  margin: 0 0 1.15em;
}

.ambassadors__copy p:last-child {
  margin-bottom: 0;
}

.ecosystem__quote,
.ecosystem__closing {
  display: block;
  width: 100%;
  height: auto;
}

.ecosystem__copy {
  margin-top: clamp(2rem, 4vw, 4.5rem);
}

.ecosystem__copy p {
  margin: 0 0 1.15em;
}

.ecosystem__copy p:last-child {
  margin-bottom: 0;
}

.page-credit {
  padding: clamp(1rem, 2vw, 2rem) 1rem;
  color: #514942;
  font-size: clamp(0.72rem, 0.9vw, 1rem);
  text-align: center;
}

.page-credit p {
  margin: 0;
}

.page-credit a {
  color: inherit;
}

.flight-experience {
  width: 100%;
}

.flight-experience__panels {
  overflow: hidden;
}

.flight-panel {
  display: block;
  width: 100%;
  height: auto;
  margin-top: -7.4%;
}

.flight-panel[hidden] {
  display: none;
}

.flight-experience__controls {
  --flight-gap: clamp(2.5rem, 8vw, 10rem);
  --flight-half-gap: clamp(1.25rem, 4vw, 5rem);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 80%;
  margin: 0 auto;
  padding: clamp(1rem, 2.4vw, 3rem) 0;
}

.flight-hotspot {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  border: 1px solid transparent;
  border-radius: 999px;
  background: #cfcfcf;
  color: #91463c;
  padding: clamp(0.8rem, 1.45vw, 1.8rem) 0.5rem;
  font-family: "NotoSerif-Regular", "Noto Serif", Georgia, serif;
  font-size: clamp(0.76rem, 1.8vw, 2.15rem);
  font-weight: 400;
  line-height: 1;
  text-transform: uppercase;
  white-space: nowrap;
  cursor: pointer;
  transition: color 260ms ease, background-color 260ms ease, border-color 260ms ease;
}

.flight-hotspot:not(:last-child) {
  margin-right: var(--flight-gap);
}

.flight-hotspot:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 100%;
  width: var(--flight-gap);
  height: 1px;
  background: #91463c;
  transform: translateY(-50%);
  pointer-events: none;
}

.flight-hotspot:not(:last-child)::before {
  content: "";
  position: absolute;
  z-index: 1;
  top: 50%;
  right: calc(0px - var(--flight-half-gap));
  width: clamp(0.45rem, 0.8vw, 0.9rem);
  aspect-ratio: 1;
  border-radius: 50%;
  background: #91463c;
  transform: translate(50%, -50%);
  pointer-events: none;
}

.flight-hotspot[aria-selected="true"] {
  background: #bd1731;
  color: #ffc400;
  border-color: #951126;
}

.flight-hotspot:hover {
  color: #ffc400;
}

.flight-hotspot:focus-visible {
  outline: 2px solid #f7bd16;
  outline-offset: -6px;
}

@media (prefers-reduced-motion: reduce) {
  .hero__plane,
  .hero__clouds {
    animation: none;
  }

  .hero__plane--two {
    display: none;
  }

  .js-enabled .scroll-reveal,
  .js-enabled .scroll-reveal.is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .flight-hotspot {
    transition: none;
  }
}

.aspiration__feature {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 auto;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 640px) {
  .hero__background {
    width: 100%;
  }

  .story-copy {
    width: 82%;
    font-size: 0.82rem;
  }

  .interactive-label {
    width: 72%;
  }

  .flight-experience__controls {
    --flight-gap: clamp(1.25rem, 7vw, 2.75rem);
    --flight-half-gap: clamp(0.625rem, 3.5vw, 1.375rem);
    width: 96%;
  }

  .flight-hotspot {
    padding: clamp(0.68rem, 2.8vw, 0.9rem) 0.15rem;
    font-size: clamp(0.5rem, 2.25vw, 0.72rem);
    line-height: 1.05;
  }

  .aspiration__feature {
    width: 100%;
  }
}

@media (max-width: 420px) {
  .flight-experience__controls {
    --flight-gap: clamp(0.75rem, 4vw, 1.1rem);
    --flight-half-gap: clamp(0.375rem, 2vw, 0.55rem);
    width: 98%;
  }

  .flight-hotspot {
    padding-inline: 0.05rem;
    font-size: clamp(0.46rem, 2.3vw, 0.6rem);
  }
}

@media (max-width: 900px) {
  .milestone-timeline {
    padding-inline: 1.2rem;
  }

  .milestone-timeline__header {
    width: 100%;
  }

  .timeline::before {
    left: 1.05rem;
    bottom: 0;
  }

  .timeline {
    display: block;
  }

  .tl-item,
  .tl-item:nth-child(even) {
    left: 0;
    width: 100%;
    margin-top: 0;
    padding: 0 0 1.6rem 3.4rem;
    text-align: left;
  }

  .tl-item .tl-node,
  .tl-item:nth-child(even) .tl-node {
    right: auto;
    left: 0;
  }

  .tl-card {
    width: 100%;
  }
}


/* ============ INTEGRATED ROUTE MAP ============ */
.network-map {
    --red: #a71920;
    --red-bright: #c72b37;
    --red-soft: #d75d63;
    --cream: #fbf8f1;
    --land: #e9e1d2;
    --land-line: #f6f0e7;
    --ink: #4f2020;
    --muted: #826f68;
    --white: #ffffff;
  }
  .network-map, .network-map * { box-sizing: border-box; }
  .network-map {
    font-family: "NotoSerif-Regular", "Noto Serif", Georgia, serif;
    font-weight: 400;
    background: var(--page-background);
    color: var(--ink);
    padding: 24px;
  }
  .network-map button { font: inherit; }
  .route-app {
    width: min(1220px, 100%);
    margin: 0 auto;
  }
  .tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin: 0 auto 14px;
    padding: 5px;
    width: fit-content;
    border: 1px solid rgba(167, 25, 32, .16);
    border-radius: 999px;
    background: rgba(255, 255, 255, .88);
    box-shadow: 0 8px 30px rgba(78, 42, 34, .08);
  }
  .tab-button {
    min-width: 132px;
    border: 0;
    border-radius: 999px;
    padding: 11px 20px;
    background: transparent;
    color: var(--red);
    font-weight: 400;
    letter-spacing: .04em;
    cursor: pointer;
    transition: background .2s ease, color .2s ease, transform .2s ease;
  }
  .tab-button:hover { transform: translateY(-1px); }
  .tab-button[aria-selected="true"] {
    background: var(--red);
    color: #fff;
    box-shadow: 0 6px 16px rgba(167, 25, 32, .25);
  }
  .map-card {
    position: relative;
    min-height: 690px;
    overflow: hidden;
    border: 1px solid rgba(83, 54, 45, .12);
    border-radius: 4px;
    background:
      radial-gradient(circle at 84% 8%, rgba(255, 231, 224, .7), transparent 32%),
      linear-gradient(135deg, #fff 0%, var(--cream) 100%);
    box-shadow: 0 18px 45px rgba(74, 47, 38, .10);
  }
  .map-card[hidden] { display: none; }
  .map-stage {
    position: absolute;
    inset: 0;
    overflow: hidden;
  }
  .mapsvg { width: 100%; height: 100%; display: block; }

  .domestic-svg .provinces path {
    fill: var(--land);
    stroke: var(--land-line);
    stroke-width: .55;
    stroke-linejoin: round;
  }
  .domestic-svg .island-cluster path,
  .domestic-svg .island-cluster circle {
    fill: #ded4c4;
    stroke: #d2c5b5;
    stroke-width: .35;
  }
  .domestic-svg .island-label,
  .world-svg .islet-label {
    fill: #9a887f;
    font-size: 12.7px;
    font-weight: 400;
    letter-spacing: .04em;
  }
  .domestic-svg .island-label tspan { font-weight: 400; font-style: normal; }

  .world-svg .countries path {
    fill: #e8dfd0;
    stroke: #faf6ef;
    stroke-width: .55;
  }
  .world-svg .vietnam path {
    fill: #d5c1a9;
    stroke: #fbf5ec;
    stroke-width: .34;
  }
  .world-svg .international-archipelago circle {
    fill: #bcae9a;
    stroke: #a89985;
    stroke-width: .3;
  }
  .world-svg .islet-label {
    fill: #8f7d72;
    font-size: 2.6px;
    font-weight: 400;
    letter-spacing: .03em;
    paint-order: stroke;
    stroke: rgba(255, 255, 255, .9);
    stroke-width: 1px;
  }

  .route {
    opacity: .78;
    pointer-events: stroke;
    transition: opacity .2s ease, stroke-width .2s ease, filter .2s ease;
    animation: drawRoute 5s ease-in-out infinite;
  }
  @keyframes drawRoute {
    0% { stroke-dashoffset: var(--route-length); opacity: 0; }
    6% { opacity: .78; }
    58% { stroke-dashoffset: 0; opacity: .9; }
    78% { stroke-dashoffset: 0; opacity: .9; }
    98%, 100% { stroke-dashoffset: 0; opacity: 0; }
  }
  .route.is-active {
    opacity: 1 !important;
    stroke-width: 4 !important;
    filter: drop-shadow(0 0 4px rgba(167, 25, 32, .36));
    animation-play-state: paused;
    stroke-dashoffset: 0 !important;
  }
  .route.is-dimmed { opacity: .11 !important; animation-play-state: paused; }
  .world-svg .route { stroke-width: .9; }
  .world-svg .route.is-active { stroke-width: 1.7 !important; }

  .airport-marker { cursor: default; }
  .airport-marker .halo { fill: rgba(167, 25, 32, .14); }
  .airport-marker .dot-ring { fill: #fff9f2; stroke: var(--red); stroke-width: 2; }
  .airport-marker .dot-core { fill: var(--red-bright); }
  .capital-star {
    fill: var(--red-bright);
    stroke: #fffaf3;
    stroke-width: 1.8;
    stroke-linejoin: round;
    filter: drop-shadow(0 2px 2px rgba(126, 24, 28, .25));
  }
  .world-svg .capital-star { stroke-width: 1.1; }
  .world-svg .airport-marker .halo,
  .world-svg .airport-marker .dot-ring,
  .world-svg .airport-marker .dot-core {
    transform-box: fill-box;
    transform-origin: center;
    transform: scale(.68);
  }
  .world-svg .airport-marker .dot-ring { stroke-width: 1.1; }
  .airport-label {
    fill: #88736b;
    font-size: 14.3px;
    font-weight: 400;
    letter-spacing: .03em;
    paint-order: stroke;
    stroke: rgba(255, 255, 255, .9);
    stroke-width: 3px;
    stroke-linejoin: round;
  }
  .world-svg .airport-label { font-size: 4.6px; stroke-width: 1.35px; }
  .hub-ring {
    fill: none;
    stroke: var(--red-bright);
    stroke-width: 1.35;
    transform-box: fill-box;
    transform-origin: center;
    animation: pulseHub 2.5s ease-out infinite;
  }
  .hub-ring.ring-two { animation-delay: 1.2s; }
  @keyframes pulseHub {
    0% { transform: scale(.7); opacity: .55; }
    100% { transform: scale(2.15); opacity: 0; }
  }
  .plane-icon {
    transform-box: fill-box;
    transform-origin: center;
    filter: drop-shadow(0 3px 3px rgba(85, 35, 32, .26));
  }
  .world-svg .plane-icon {
    transform-box: view-box;
    transform-origin: 586.61px 287.67px;
    transform: rotate(-5deg) scale(0.7);
  }
  .hub-label {
    fill: var(--red);
    font-size: 16.5px;
    font-weight: 400;
    paint-order: stroke;
    stroke: #fff;
    stroke-width: 4px;
  }
  .world-svg .hub-label { font-size: 8px; stroke-width: 1.8px; }

  .route-panel {
    position: absolute;
    z-index: 5;
    top: 24px;
    left: 24px;
    width: 286px;
    max-height: calc(100% - 48px);
    padding: 0;
    color: var(--red);
    pointer-events: auto;
  }
  .panel-heading {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    white-space: nowrap;
  }
  .panel-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 7px 10px;
    border-radius: 999px;
    background: var(--red);
    color: #fff;
    font-size: 15.3px;
    font-weight: 400;
    letter-spacing: .03em;
    box-shadow: 0 5px 12px rgba(167, 25, 32, .2);
  }
  .panel-count { font-size: 16.5px; font-weight: 400; }
  .route-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 1px;
  }
  .route-link {
    display: grid;
    grid-template-columns: 27px 1fr;
    gap: 5px;
    width: 100%;
    padding: 4px 5px;
    border: 0;
    border-radius: 5px;
    background: transparent;
    color: var(--red);
    text-align: left;
    font-size: 15.3px;
    line-height: 1.22;
    cursor: pointer;
    transition: background .16s ease, transform .16s ease;
  }
  .route-link:hover,
  .route-link:focus-visible,
  .route-link.is-active {
    outline: none;
    background: rgba(167, 25, 32, .09);
    transform: translateX(2px);
  }
  .route-no { font-weight: 400; font-variant-numeric: tabular-nums; }

  .map-note {
    position: absolute;
    right: 17px;
    bottom: 15px;
    z-index: 4;
    color: var(--red);
    font-size: 15.3px;
    letter-spacing: .02em;
  }
  .world-map-note { display: none; }

  @media (max-width: 800px) {
    .network-map { padding: 10px; }
    .tabs {
      gap: 4px;
      padding: 4px;
      margin-bottom: 12px;
    }
    .tab-button {
      min-width: 96px;
      padding: 9px 14px;
      font-size: 0.85rem;
    }
    .map-card {
      display: flex;
      min-height: 0;
      overflow: hidden;
      flex-direction: column;
    }
    .map-stage {
      position: relative;
      inset: auto;
      order: 2;
      width: 100%;
      height: clamp(520px, 105vw, 700px);
      flex: 0 0 auto;
    }
    .route-panel {
      position: relative;
      top: auto;
      right: auto;
      left: auto;
      order: 1;
      width: auto;
      max-height: 230px;
      margin: 12px;
      padding: 12px;
      overflow-y: auto;
      overscroll-behavior: contain;
      border: 1px solid rgba(167, 25, 32, .12);
      border-radius: 10px;
      background: rgba(255, 252, 247, .90);
      backdrop-filter: blur(6px);
      scrollbar-width: thin;
      scrollbar-color: rgba(167, 25, 32, .42) transparent;
    }
    .route-list { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px 8px; }
    .route-link { font-size: 13.2px; grid-template-columns: 23px 1fr; padding: 3px; }
    .map-note { font-size: 13.2px; }
    .mapsvg { transform: none; }
    #panel-international .world-svg {
      transform: scale(1.22);
      transform-origin: 55% 61%;
    }
  }
  @media (max-width: 520px) {
    .tab-button {
      min-width: 86px;
      padding: 8px 11px;
      font-size: 0.78rem;
    }
    .map-stage { height: clamp(500px, 128vw, 640px); }
    .panel-heading { white-space: normal; align-items: flex-start; }
    .panel-count { padding-top: 5px; }
    .route-list { grid-template-columns: 1fr; }
    #panel-international .world-svg {
      transform: scale(1.32);
      transform-origin: 55% 63%;
    }
  }
  @media (prefers-reduced-motion: reduce) {
    .route, .hub-ring { animation: none; }
    .route { opacity: .8; stroke-dashoffset: 0 !important; }
  }