:root {
  --color-primary: #0A2342;
  --color-accent: #F5A623;
  --color-orange: #FF6B35;
  --color-ink: #111111;
  --color-bg: #FFFFFF;
  --color-muted: #F2F2F2;
  --color-line: #D0D0D0;
  --color-rime: #D6E4F0;
  --font-title: "Noto Sans SC Black", "PingFang SC Semibold", "Microsoft YaHei Bold", sans-serif;
  --font-body: "Source Han Sans SC Regular", "PingFang SC Light", "Microsoft YaHei", sans-serif;
  --font-accent: "Ma Shan Zheng", "KaiTi", cursive, sans-serif;
  --header-height: 72px;
  --container-max: 1200px;
  --gutter: 24px;
  --radius: 4px;
  --shadow-card: 4px 4px 0 rgba(10,35,66,.12);
  --transition: .25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  line-height: 1.25;
  margin: 0 0 .5em;
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--color-primary);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

img {
  max-width: 100%;
  display: block;
}

ul, ol {
  padding-left: 1.5em;
}

:focus-visible {
  outline: 3px solid var(--color-orange);
  outline-offset: 2px;
}

.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;
}

.skip-link {
  position: fixed;
  top: -100%;
  left: 16px;
  z-index: 1500;
  padding: 12px 20px;
  background: var(--color-orange);
  color: #fff;
  font-weight: 700;
  border-radius: 0 0 var(--radius) var(--radius);
  text-decoration: none;
  transition: top .2s ease;
}

.skip-link:focus {
  top: 0;
}

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1200;
  background: transparent;
  transition: background var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  background: rgba(10, 35, 66, .97);
  box-shadow: 0 2px 12px rgba(0,0,0,.18);
}

.site-header__inner {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 16px;
  position: relative;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  font-family: var(--font-title);
  font-weight: 900;
  font-size: 18px;
  line-height: 1.2;
  white-space: nowrap;
}

.brand:hover {
  color: #fff;
}

.brand__mark {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-orange) 100%);
  clip-path: polygon(50% 0, 60% 40%, 100% 50%, 60% 60%, 50% 100%, 40% 60%, 0 50%, 40% 40%);
  display: inline-block;
}

.brand__name {
  display: inline;
}

.brand__suffix {
  display: inline;
  font-size: 13px;
  font-weight: 400;
  color: rgba(255,255,255,.7);
}

.site-nav {
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__list a {
  display: inline-block;
  padding: 8px 12px;
  color: #fff;
  text-decoration: none;
  font-size: 15px;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}

.site-nav__list a:hover {
  background: rgba(255,255,255,.15);
}

.site-nav__list a[aria-current="page"] {
  background: var(--color-accent);
  color: var(--color-primary);
  font-weight: 700;
}

.site-header__cta {
  margin-left: 0;
  text-decoration: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: 2px solid transparent;
  border-radius: var(--radius);
  font-family: var(--font-title);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-primary);
  box-shadow: 0 3px 0 rgba(0,0,0,.2);
}

.btn--primary:hover {
  background: #ffbf3d;
  transform: translateY(-2px);
  box-shadow: 0 5px 0 rgba(0,0,0,.2);
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--ghost:hover {
  background: var(--color-primary);
  color: #fff;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 48px;
  height: 48px;
  padding: 12px;
  background: transparent;
  border: 0;
  border-radius: var(--radius);
  cursor: pointer;
  color: #fff;
  position: relative;
  z-index: 1300;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  align-items: center;
}

.nav-toggle__bar {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  transition: transform .25s ease, opacity .25s ease;
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.section {
  padding: 80px 0;
}

.section--alt {
  background: var(--color-muted);
}

.section__header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 40px;
}

.section__index {
  font-family: var(--font-title);
  font-weight: 900;
  font-size: clamp(64px, 8vw, 96px);
  line-height: .8;
  color: transparent;
  -webkit-text-stroke: 2px var(--color-accent);
  text-stroke: 2px var(--color-accent);
  white-space: nowrap;
}

.section__title {
  font-size: clamp(28px, 4vw, 44px);
  margin: 0;
}

.section__intro {
  width: 100%;
  max-width: 720px;
  font-size: 17px;
  color: #444;
}

.page-head {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(115deg, rgba(10,35,66,.98) 0% 70%, rgba(10,35,66,.92) 70% 100%),
    var(--color-primary);
  color: #fff;
  padding: calc(var(--header-height) + 56px) 0 72px;
}

.page-head::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 38%;
  height: 100%;
  background:
    linear-gradient(135deg, transparent 0% 48%, rgba(245,166,35,.35) 48% 52%, transparent 52%),
    linear-gradient(225deg, transparent 0% 62%, rgba(214,228,240,.3) 62% 66%, transparent 66%);
  pointer-events: none;
}

.page-head__index {
  display: block;
  font-family: var(--font-accent);
  font-size: clamp(48px, 6vw, 72px);
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 12px;
}

.page-head__title {
  font-size: clamp(32px, 5vw, 56px);
  margin-bottom: 16px;
  max-width: 14em;
}

.page-head__desc {
  max-width: 680px;
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255,255,255,.85);
}

.breadcrumb {
  font-size: 14px;
  margin: 24px 0;
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #555;
}

.breadcrumb__link {
  color: var(--color-primary);
  text-decoration: none;
}

.breadcrumb__link:hover {
  text-decoration: underline;
}

.breadcrumb__separator {
  color: var(--color-line);
}

.grid {
  display: grid;
  gap: 24px;
}

.grid--split {
  grid-template-columns: 2fr 1fr;
}

.grid--cards {
  grid-template-columns: repeat(3, 1fr);
}

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

.card {
  position: relative;
  padding: 28px;
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 18px;
  height: 18px;
  border-left: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: linear-gradient(135deg, transparent 48%, var(--color-accent) 48%);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 6px 8px 0 rgba(10,35,66,.18);
  border-color: var(--color-accent);
}

.card__title {
  font-size: 20px;
  margin-bottom: 8px;
}

.card__text {
  font-size: 15px;
  color: #555;
  margin-bottom: 0;
}

.pill {
  display: inline-block;
  padding: 4px 12px;
  background: var(--color-accent);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
  border-radius: 999px;
  white-space: nowrap;
}

.media {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(145deg, var(--color-rime) 0%, var(--color-primary) 100%);
  border-radius: var(--radius);
}

.media::before {
  content: "";
  display: block;
  padding-bottom: 56.25%;
}

.media--portrait::before {
  padding-bottom: 125%;
}

.media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.site-footer {
  position: relative;
  background: var(--color-primary);
  color: #fff;
  padding: 64px 0 0;
  margin-top: 80px;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background:
    repeating-linear-gradient(45deg,
      var(--color-accent) 0 8px,
      var(--color-orange) 8px 16px,
      transparent 16px 24px);
  opacity: .9;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}

.site-footer__col h2 {
  margin-top: 8px;
  font-size: 14px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.site-footer__statement {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,.7);
  margin-top: 16px;
  max-width: 320px;
}

.site-footer__links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer__links li + li {
  margin-top: 8px;
}

.site-footer__links a {
  color: rgba(255,255,255,.85);
  text-decoration: none;
  font-size: 15px;
  transition: color var(--transition), padding-left var(--transition);
}

.site-footer__links a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.site-footer__col--contact p {
  margin: 0 0 10px;
  font-size: 14px;
  color: rgba(255,255,255,.75);
}

.site-footer__bottom {
  border-top: 1px solid rgba(255,255,255,.15);
  padding: 16px 0;
  font-size: 13px;
  color: rgba(255,255,255,.6);
}

.site-footer__bottom-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
}

.site-footer__bottom p {
  margin: 0;
}

.brand--footer {
  color: #fff;
  font-size: 20px;
}

.brand--footer:hover {
  color: #fff;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .45s ease, transform .45s ease;
  will-change: opacity, transform;
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

@media (max-width: 900px) {
  :root {
    --header-height: 64px;
  }

  .site-header__inner {
    gap: 8px;
  }

  .site-header__cta {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    margin: 0;
    background: var(--color-primary);
    box-shadow: 0 12px 24px rgba(0,0,0,.28);
    padding: 16px 24px 20px;
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
    z-index: 1190;
  }

  .site-nav[data-open] {
    transform: none;
    opacity: 1;
    visibility: visible;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__list li + li {
    border-top: 1px solid rgba(255,255,255,.12);
  }

  .site-nav__list a {
    display: block;
    padding: 14px 8px;
    border-radius: 0;
    font-size: 16px;
  }

  .site-nav__list a[aria-current="page"] {
    background: transparent;
    color: var(--color-accent);
    box-shadow: inset 4px 0 0 var(--color-accent);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .site-footer__col--brand {
    grid-column: 1 / -1;
  }

  .site-footer__statement {
    max-width: 480px;
  }

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

  .grid--split,
  .grid--feature {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .container {
    --gutter: 16px;
  }

  .section {
    padding: 56px 0;
  }

  .page-head {
    padding-bottom: 56px;
  }

  .page-head::before {
    width: 100%;
    height: 160px;
    top: auto;
    bottom: 0;
  }

  .section__header {
    gap: 12px;
  }

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

  .site-footer {
    padding-top: 48px;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

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

  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}