/* 对外落地页 · 对齐贵州民航集团官网风格（深蓝 + 白 + 机场视觉） */

:root {
  --gcac-blue: #278bc9;
  --gcac-blue-deep: #0a5a96;
  --gcac-navy: #0b3a6e;
  --gcac-navy-dark: #062748;
  --gcac-sky: #e8f4fc;
  --gcac-ink: #1a2332;
  --gcac-ink-soft: #4f5256;
  --gcac-muted: #6b7280;
  --gcac-line: #e5e9ef;
  --gcac-white: #ffffff;
  --gcac-surface: #f4f7fb;
  --gcac-orange: #e0700f;
  --font: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --max: 1200px;
  --header-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  color: var(--gcac-ink);
  background: var(--gcac-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.wrap {
  width: min(100% - 40px, var(--max));
  margin: 0 auto;
}

/* ---- Header ---- */
.lp-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.lp-header.is-scrolled {
  border-bottom-color: var(--gcac-line);
  box-shadow: 0 2px 12px rgba(6, 39, 72, 0.06);
}

.lp-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.lp-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.lp-logo img {
  height: 42px;
  width: auto;
}

.lp-logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
  border-left: 1px solid var(--gcac-line);
  padding-left: 12px;
}

.lp-logo__cn {
  font-size: 15px;
  font-weight: 600;
  color: var(--gcac-navy);
}

.lp-logo__en {
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--gcac-muted);
  text-transform: uppercase;
}

.lp-nav {
  display: flex;
  align-items: center;
  gap: 4px 28px;
}

.lp-nav a {
  font-size: 15px;
  color: var(--gcac-ink-soft);
  padding: 8px 0;
  position: relative;
}

.lp-nav a:hover,
.lp-nav a.is-active {
  color: var(--gcac-blue-deep);
}

.lp-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--gcac-blue);
  transform: scaleX(0);
  transition: transform 0.2s;
}

.lp-nav a:hover::after,
.lp-nav a.is-active::after {
  transform: scaleX(1);
}

.lp-header__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 20px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--gcac-blue) 0%, var(--gcac-blue-deep) 100%);
  border-radius: 4px;
  white-space: nowrap;
  transition: filter 0.15s, transform 0.15s;
}

.lp-header__cta:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

.lp-menu-btn {
  display: none;
  border: 0;
  background: transparent;
  width: 40px;
  height: 40px;
  cursor: pointer;
  position: relative;
}

.lp-menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--gcac-navy);
  margin: 5px auto;
  transition: 0.2s;
}

/* ---- Hero ---- */
.lp-hero {
  position: relative;
  min-height: min(88vh, 720px);
  margin-top: var(--header-h);
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
  background: var(--gcac-navy-dark);
}

.lp-hero__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(105deg, rgba(6, 39, 72, 0.88) 0%, rgba(10, 90, 150, 0.55) 55%, rgba(6, 39, 72, 0.35) 100%),
    url("../assets/landing/hero-airport.jpg") center / cover no-repeat;
}

.lp-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.35;
  pointer-events: none;
}

.lp-hero__inner {
  position: relative;
  z-index: 1;
  padding: 72px 0 80px;
  max-width: 720px;
}

.lp-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.78);
  margin-bottom: 18px;
}

.lp-hero__kicker::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--gcac-orange);
}

.lp-hero__title {
  font-size: clamp(28px, 4.2vw, 42px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.25);
}

.lp-hero__title em {
  font-style: normal;
  color: #9fd4f5;
}

.lp-hero__desc {
  font-size: 16px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 28px;
  max-width: 560px;
}

.lp-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.lp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 4px;
  border: 1px solid transparent;
  transition: 0.15s;
}

.lp-btn--primary {
  color: #fff;
  background: var(--gcac-blue);
  border-color: var(--gcac-blue);
}

.lp-btn--primary:hover {
  background: var(--gcac-blue-deep);
  border-color: var(--gcac-blue-deep);
}

.lp-btn--ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.45);
  background: rgba(255, 255, 255, 0.08);
}

.lp-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: #fff;
}

.lp-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.lp-hero__stat strong {
  display: block;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.lp-hero__stat span {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
}

/* slogan strip like client site */
.lp-slogan {
  background: linear-gradient(90deg, var(--gcac-navy-dark), var(--gcac-blue-deep) 50%, var(--gcac-navy));
  color: #fff;
  text-align: center;
  padding: 18px 16px;
  letter-spacing: 0.28em;
  font-size: clamp(15px, 2.2vw, 20px);
  font-weight: 600;
}

.lp-slogan span {
  margin: 0 0.35em;
  opacity: 0.45;
  font-weight: 400;
}

/* ---- Sections ---- */
.lp-section {
  padding: 72px 0;
}

.lp-section--surface {
  background: var(--gcac-surface);
}

.lp-section__head {
  text-align: center;
  margin-bottom: 40px;
}

.lp-section__en {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gcac-blue);
  font-weight: 600;
  margin-bottom: 8px;
}

.lp-section__title {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  color: var(--gcac-navy);
  margin-bottom: 12px;
}

.lp-section__lead {
  font-size: 15px;
  color: var(--gcac-ink-soft);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* pillars */
.lp-pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.lp-pillar {
  background: var(--gcac-white);
  border: 1px solid var(--gcac-line);
  border-radius: 8px;
  padding: 28px 24px 26px;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.lp-pillar:hover {
  border-color: rgba(39, 139, 201, 0.35);
  box-shadow: 0 8px 24px rgba(10, 90, 150, 0.08);
}

.lp-pillar__num {
  font-size: 13px;
  font-weight: 700;
  color: var(--gcac-blue);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.lp-pillar__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--gcac-navy);
  margin-bottom: 10px;
}

.lp-pillar__text {
  font-size: 14px;
  color: var(--gcac-ink-soft);
  line-height: 1.7;
}

/* features */
.lp-features {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 28px;
  align-items: stretch;
}

.lp-feature-visual {
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  min-height: 360px;
  background:
    linear-gradient(160deg, rgba(6, 39, 72, 0.55), rgba(39, 139, 201, 0.25)),
    url("../assets/landing/banner-2.jpg") center / cover no-repeat;
}

.lp-feature-visual__card {
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 24px;
  background: rgba(255, 255, 255, 0.96);
  border-radius: 8px;
  padding: 18px 20px;
  box-shadow: 0 8px 24px rgba(6, 39, 72, 0.15);
}

.lp-feature-visual__card h3 {
  font-size: 16px;
  color: var(--gcac-navy);
  margin-bottom: 6px;
}

.lp-feature-visual__card p {
  font-size: 13px;
  color: var(--gcac-ink-soft);
  line-height: 1.55;
}

.lp-feature-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.lp-feature-item {
  display: flex;
  gap: 14px;
  padding: 18px 18px 18px 16px;
  background: var(--gcac-white);
  border: 1px solid var(--gcac-line);
  border-radius: 8px;
  border-left: 3px solid var(--gcac-blue);
}

.lp-feature-item h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--gcac-navy);
  margin-bottom: 4px;
}

.lp-feature-item p {
  font-size: 13.5px;
  color: var(--gcac-ink-soft);
  line-height: 1.6;
}

/* flow */
.lp-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  counter-reset: step;
}

.lp-step {
  position: relative;
  background: var(--gcac-white);
  border: 1px solid var(--gcac-line);
  border-radius: 8px;
  padding: 22px 18px 20px;
  text-align: left;
}

.lp-step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--gcac-blue);
  margin-bottom: 10px;
}

.lp-step h3 {
  font-size: 16px;
  color: var(--gcac-navy);
  margin-bottom: 8px;
}

.lp-step p {
  font-size: 13.5px;
  color: var(--gcac-ink-soft);
  line-height: 1.6;
}

/* audience */
.lp-roles {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.lp-role {
  text-align: center;
  padding: 28px 16px;
  background: var(--gcac-white);
  border: 1px solid var(--gcac-line);
  border-radius: 8px;
}

.lp-role__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  border-radius: 50%;
  background: var(--gcac-sky);
  color: var(--gcac-blue-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
}

.lp-role h3 {
  font-size: 15px;
  color: var(--gcac-navy);
  margin-bottom: 6px;
}

.lp-role p {
  font-size: 13px;
  color: var(--gcac-muted);
  line-height: 1.55;
}

/* CTA band */
.lp-cta {
  position: relative;
  padding: 64px 0;
  color: #fff;
  overflow: hidden;
  background: var(--gcac-navy-dark);
}

.lp-cta__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(100deg, rgba(6, 39, 72, 0.92), rgba(39, 139, 201, 0.75)),
    url("../assets/landing/hero-airport.jpg") center / cover no-repeat;
}

.lp-cta__inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}

.lp-cta h2 {
  font-size: clamp(22px, 3vw, 30px);
  margin-bottom: 12px;
}

.lp-cta p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 24px;
  line-height: 1.7;
}

.lp-cta .lp-btn--primary {
  background: #fff;
  color: var(--gcac-blue-deep);
  border-color: #fff;
}

.lp-cta .lp-btn--primary:hover {
  background: var(--gcac-sky);
}

.lp-cta .lp-btn--ghost {
  margin-left: 10px;
}

/* footer */
.lp-footer {
  background: #0a1f36;
  color: rgba(255, 255, 255, 0.78);
  padding: 40px 0 28px;
  font-size: 13px;
}

.lp-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 28px;
}

.lp-footer__brand img {
  height: 36px;
  width: auto;
  margin-bottom: 12px;
  opacity: 0.95;
}

.lp-footer h4 {
  color: #fff;
  font-size: 14px;
  margin-bottom: 12px;
}

.lp-footer a:hover { color: #9fd4f5; }

.lp-footer p,
.lp-footer li {
  margin-bottom: 6px;
  line-height: 1.55;
}

.lp-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
  color: rgba(255, 255, 255, 0.5);
  font-size: 12px;
}

.lp-footer__bottom a {
  color: rgba(255, 255, 255, 0.65);
}

/* mobile nav drawer */
.lp-drawer {
  display: none;
  position: fixed;
  inset: var(--header-h) 0 0 0;
  z-index: 90;
  background: rgba(6, 39, 72, 0.4);
}

.lp-drawer.is-open { display: block; }

.lp-drawer__panel {
  background: #fff;
  padding: 16px 20px 24px;
  border-bottom: 1px solid var(--gcac-line);
}

.lp-drawer__panel a {
  display: block;
  padding: 12px 0;
  font-size: 16px;
  color: var(--gcac-navy);
  border-bottom: 1px solid var(--gcac-line);
}

.lp-drawer__panel .lp-header__cta {
  width: 100%;
  margin-top: 16px;
}

@media (max-width: 960px) {
  .lp-pillars,
  .lp-flow,
  .lp-roles {
    grid-template-columns: 1fr 1fr;
  }

  .lp-features {
    grid-template-columns: 1fr;
  }

  .lp-footer__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .lp-nav,
  .lp-header__cta { display: none; }

  .lp-menu-btn { display: block; }

  .lp-logo__text { display: none; }

  .lp-pillars,
  .lp-flow,
  .lp-roles {
    grid-template-columns: 1fr;
  }

  .lp-hero__inner { padding: 48px 0 56px; }

  .lp-cta .lp-btn--ghost {
    margin-left: 0;
    margin-top: 10px;
  }

  .lp-hero__actions,
  .lp-cta__inner {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }

  .lp-cta__inner .lp-btn { width: 100%; }
}