/* ==========================================================================
   yongli-route.com.cn  ·  /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 1.5rem;
}

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }

ul, ol { padding: 0; list-style: none; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-title);
  font-weight: 700;
  line-height: 1.28;
  color: var(--c-text);
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

table { border-collapse: collapse; width: 100%; }

/* ---------- tokens ---------- */
:root {
  --c-deep: #061A2F;
  --c-sea: #0B2A4A;
  --c-route: #154A78;
  --c-ice: #E8F1F8;
  --c-frost: #F7FBFF;
  --c-neon: #31E0D0;
  --c-neon-soft: #8FF5EC;
  --c-warm: #FF9F45;
  --c-line: #B7D3E8;
  --c-text: #0A1C2E;
  --c-muted: #4A6782;

  --font-title: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", "Roboto Mono", monospace;

  --shell-w: 1200px;
  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;

  --shadow-1: 0 1px 0 rgba(183, 211, 232, .55), 0 14px 34px -24px rgba(6, 26, 47, .55);
  --shadow-2: 0 26px 64px -36px rgba(6, 26, 47, .7);

  --ease: cubic-bezier(.22, .68, .36, 1);
}

/* ---------- base ---------- */
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text);
  background-color: var(--c-frost);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.nav-open { overflow: hidden; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

:focus-visible {
  outline: 2px solid var(--c-neon);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- layout ---------- */
.shell {
  width: min(100% - 2.5rem, var(--shell-w));
  margin-inline: auto;
}

.section { padding: clamp(2.6rem, 6vw, 4.5rem) 0; }
.section--ice { background: linear-gradient(180deg, var(--c-ice) 0%, var(--c-frost) 100%); }
.section--deep {
  background:
    radial-gradient(90% 120% at 12% 0%, rgba(21, 74, 120, .7), transparent 60%),
    linear-gradient(180deg, var(--c-sea) 0%, var(--c-deep) 100%);
  color: #C9DEED;
}
.section--deep h1,
.section--deep h2,
.section--deep h3 { color: var(--c-frost); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: .6rem 1.5rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--c-line);
}
.section-head__kicker {
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .26em;
  color: var(--c-route);
  text-transform: uppercase;
}
.section-head h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); }

.grid { display: grid; gap: 1.5rem; }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .8rem 1.55rem;
  font-size: .9375rem;
  letter-spacing: .08em;
  border-radius: 999px;
  border: 1px solid transparent;
  transition:
    background-color .22s var(--ease),
    color .22s var(--ease),
    border-color .22s var(--ease),
    box-shadow .22s var(--ease);
}
.btn--primary {
  background: linear-gradient(120deg, var(--c-neon-soft), var(--c-neon));
  color: var(--c-deep);
  font-weight: 600;
}
.btn--primary:hover { box-shadow: 0 0 0 5px rgba(49, 224, 208, .18); }
.btn--ghost {
  border-color: var(--c-line);
  color: var(--c-sea);
  background: rgba(255, 255, 255, .6);
}
.btn--ghost:hover {
  border-color: var(--c-neon);
  color: var(--c-route);
  background: var(--c-frost);
}
.btn--dark {
  background: var(--c-sea);
  color: var(--c-ice);
}
.btn--dark:hover { background: var(--c-route); }

/* ---------- breadcrumb ---------- */
.breadcrumb {
  font-size: .8125rem;
  letter-spacing: .08em;
  color: var(--c-muted);
}
.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
}
.breadcrumb li { display: inline-flex; align-items: center; gap: .45rem; }
.breadcrumb li + li::before {
  content: "/";
  color: var(--c-line);
}
.breadcrumb a {
  color: var(--c-route);
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.breadcrumb a:hover {
  color: var(--c-sea);
  border-bottom-color: var(--c-neon);
}

/* ---------- prose ---------- */
.prose {
  max-width: 72ch;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: #1F394F;
}
.prose > * + * { margin-top: 1.15em; }
.prose h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-top: 1.9em;
  color: var(--c-sea);
}
.prose h3 {
  font-size: 1.25rem;
  margin-top: 1.6em;
  color: var(--c-route);
}
.prose ul,
.prose ol { padding-left: 1.35em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: .45em; }
.prose strong { color: var(--c-sea); }
.prose a {
  color: var(--c-route);
  border-bottom: 1px solid var(--c-neon);
  transition: color .2s var(--ease), background-color .2s var(--ease);
}
.prose a:hover {
  color: var(--c-sea);
  background: rgba(49, 224, 208, .14);
}
.prose code {
  font-family: var(--font-mono);
  font-size: .9em;
  background: var(--c-ice);
  padding: .12em .45em;
  border-radius: 4px;
  color: var(--c-route);
}
.prose blockquote {
  border-left: 3px solid var(--c-neon);
  padding-left: 1.1rem;
  color: var(--c-muted);
}

/* ---------- surfaces ---------- */
.panel {
  background: var(--c-frost);
  border: 1px solid rgba(183, 211, 232, .78);
  border-radius: var(--radius-m);
  padding: 1.6rem;
  box-shadow: var(--shadow-1);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.panel:hover {
  transform: translateY(-2px);
  border-color: var(--c-neon);
  box-shadow: var(--shadow-2);
}
.panel--flat {
  background: transparent;
  border: 0;
  border-top: 2px solid var(--c-neon);
  border-radius: 0;
  box-shadow: none;
  padding: 1.2rem 0 0;
}
.panel--flat:hover { transform: none; box-shadow: none; }

.glass {
  background: linear-gradient(140deg, rgba(247, 251, 255, .8), rgba(232, 241, 248, .48));
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, .62);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-2);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .28rem .75rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .06em;
  border-radius: 999px;
  border: 1px solid var(--c-line);
  color: var(--c-route);
  background: rgba(232, 241, 248, .75);
}
.tag--live {
  border-color: rgba(49, 224, 208, .6);
  color: #0E7C72;
  background: rgba(49, 224, 208, .15);
}
.tag--warm {
  border-color: rgba(255, 159, 69, .65);
  color: #A85812;
  background: rgba(255, 159, 69, .15);
}

.stat { display: flex; flex-direction: column; gap: .25rem; }
.stat__value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  line-height: 1.3;
  color: var(--c-sea);
}
.stat__label {
  font-size: .8125rem;
  letter-spacing: .12em;
  color: var(--c-muted);
}

/* ---------- image containers ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius-m);
  border: 1px solid rgba(183, 211, 232, .62);
  background-color: var(--c-sea);
  background-image:
    repeating-linear-gradient(90deg, rgba(143, 245, 236, .10) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(0deg, rgba(143, 245, 236, .10) 0 1px, transparent 1px 56px),
    radial-gradient(120% 130% at 18% 0%, rgba(49, 224, 208, .3), transparent 62%),
    linear-gradient(135deg, #154A78 0%, #0B2A4A 58%, #061A2F 100%);
}
.media::before {
  content: "";
  display: block;
  padding-top: 62%;
}
.media > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--wide::before { padding-top: 42%; }
.media--square::before { padding-top: 100%; }
.media--tall::before { padding-top: 132%; }
.media--deep {
  background-image:
    repeating-linear-gradient(90deg, rgba(143, 245, 236, .08) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(0deg, rgba(143, 245, 236, .08) 0 1px, transparent 1px 48px),
    linear-gradient(140deg, #061A2F 0%, #0B2A4A 100%);
}
.media__label {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .16em;
  color: var(--c-neon-soft);
  background: rgba(6, 26, 47, .68);
  border: 1px solid rgba(49, 224, 208, .38);
  padding: .3rem .65rem;
  border-radius: 999px;
}
.media__caption {
  margin-top: .7rem;
  font-size: .8125rem;
  letter-spacing: .05em;
  color: var(--c-muted);
}

/* ---------- accordion ---------- */
.accordion { border-top: 1px solid var(--c-line); }
.accordion__item { border-bottom: 1px solid var(--c-line); }
.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1.1rem .2rem;
  text-align: left;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--c-sea);
  transition: color .2s var(--ease);
}
.accordion__trigger:hover { color: var(--c-route); }
.accordion__icon {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
}
.accordion__icon::before,
.accordion__icon::after {
  content: "";
  position: absolute;
  background: var(--c-neon);
  border-radius: 2px;
  transition: transform .25s var(--ease), opacity .25s var(--ease);
}
.accordion__icon::before { left: 0; top: 6px; width: 14px; height: 2px; }
.accordion__icon::after { left: 6px; top: 0; width: 2px; height: 14px; }
.accordion__trigger[aria-expanded="true"] .accordion__icon::after { transform: scaleY(0); }
.accordion__panel {
  padding: 0 .2rem 1.3rem;
  color: #3A5670;
  font-size: .9688rem;
  line-height: 1.85;
}
.accordion__panel[hidden] { display: none; }

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 200;
  transform: translate(-50%, -140%);
  padding: .7rem 1.4rem;
  background: var(--c-neon);
  color: var(--c-deep);
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .08em;
  border-radius: 0 0 var(--radius-s) var(--radius-s);
  transition: transform .2s var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); }

/* ==========================================================================
   HEADER
   ========================================================================== */
.site-header {
  position: relative;
  z-index: 60;
}

.header-utility {
  background: var(--c-deep);
  color: #9FC0DA;
  font-size: .8125rem;
  letter-spacing: .06em;
}
.header-utility__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 40px;
}
.header-utility__tag {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.header-utility__sync {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  white-space: nowrap;
  color: #CBDFF0;
}
.header-utility__sync .mono { color: var(--c-neon); font-size: .8125rem; }

.pulse-dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-neon);
  box-shadow: 0 0 0 4px rgba(49, 224, 208, .14);
}
.pulse-dot--warm {
  background: var(--c-warm);
  box-shadow: 0 0 0 4px rgba(255, 159, 69, .16);
}

.masthead {
  background:
    radial-gradient(120% 180% at 50% -45%, rgba(49, 224, 208, .2), transparent 58%),
    linear-gradient(180deg, #F7FBFF 0%, #E8F1F8 100%);
  border-bottom: 1px solid var(--c-line);
  padding: 1.4rem 0 1.2rem;
}
.masthead__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.1rem;
}
.masthead__rule {
  flex: 1 1 0;
  min-width: 1.5rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-line));
}
.masthead__inner > .masthead__rule:last-child {
  background: linear-gradient(90deg, var(--c-line), transparent);
}
.masthead__brand {
  display: inline-flex;
  align-items: baseline;
  gap: .6rem;
  white-space: nowrap;
}
.masthead__brand-cn {
  font-family: var(--font-title);
  font-size: clamp(1.6rem, 4.4vw, 2.35rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .14em;
  color: var(--c-sea);
  transition: color .24s var(--ease);
}
.masthead__brand-tail {
  padding-left: .9rem;
  border-left: 1px solid var(--c-line);
  font-size: .8125rem;
  letter-spacing: .4em;
  color: var(--c-route);
  transition: color .24s var(--ease);
}
.masthead__brand:hover .masthead__brand-cn { color: var(--c-route); }
.masthead__brand:hover .masthead__brand-tail { color: var(--c-sea); }

.navbar {
  background: linear-gradient(180deg, #0B2A4A 0%, #082038 100%);
  border-bottom: 1px solid rgba(183, 211, 232, .24);
}
.navbar__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
}

.primary-nav__title { display: none; }
.primary-nav__item { display: block; }
.primary-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: .25rem;
}
.primary-nav__link {
  display: inline-block;
  padding: .5rem .95rem;
  font-size: .9375rem;
  letter-spacing: .08em;
  color: #A9C7DE;
  border: 1px solid transparent;
  border-radius: 999px;
  transition:
    color .22s var(--ease),
    background-color .22s var(--ease),
    border-color .22s var(--ease);
}
.primary-nav__link:hover,
.primary-nav__link:focus-visible {
  color: #FFFFFF;
  background: rgba(49, 224, 208, .12);
  border-color: rgba(49, 224, 208, .35);
}
.primary-nav__link[aria-current="page"] {
  color: var(--c-neon);
  background: rgba(49, 224, 208, .09);
  border-color: rgba(49, 224, 208, .48);
}

.nav-cta {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  padding: .42rem 1.05rem;
  font-size: .875rem;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--c-deep);
  background: linear-gradient(120deg, var(--c-neon-soft), var(--c-neon));
  border-radius: 999px;
  box-shadow: 0 0 0 0 rgba(49, 224, 208, .22);
  transition: box-shadow .24s var(--ease), background .24s var(--ease);
}
.nav-cta:hover {
  background: var(--c-neon-soft);
  box-shadow: 0 0 0 5px rgba(49, 224, 208, .2);
}

.nav-toggle {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  display: none;
  align-items: center;
  gap: .55rem;
  padding: .45rem .85rem .45rem .6rem;
  font-size: .8125rem;
  letter-spacing: .16em;
  color: #CBDFF0;
  border: 1px solid rgba(183, 211, 232, .35);
  border-radius: 999px;
  transition: color .22s var(--ease), border-color .22s var(--ease);
}
.nav-toggle:hover { color: var(--c-neon); border-color: var(--c-neon); }
.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}
.nav-toggle__bars i {
  display: block;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.nav-close { display: none; }

.nav-scrim {
  position: fixed;
  inset: 0;
  z-index: 70;
  background: rgba(6, 26, 47, .64);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s var(--ease), visibility .3s var(--ease);
}
body.nav-open .nav-scrim { opacity: 1; visibility: visible; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  position: relative;
  isolation: isolate;
  background:
    radial-gradient(90% 120% at 8% 0%, rgba(21, 74, 120, .85), transparent 58%),
    radial-gradient(70% 100% at 92% 6%, rgba(49, 224, 208, .1), transparent 62%),
    linear-gradient(180deg, #0B2A4A 0%, #061A2F 100%);
  color: #A9C7DE;
  padding-top: 3.5rem;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(49, 224, 208, .65), transparent);
}

.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.5fr;
  gap: 2.4rem 2rem;
  padding-bottom: 2.8rem;
}

.footer-brand__logo {
  display: inline-block;
  font-family: var(--font-title);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--c-frost);
  transition: color .22s var(--ease);
}
.footer-brand__logo:hover { color: var(--c-neon); }
.footer-brand__note {
  margin-top: .9rem;
  max-width: 30ch;
  font-size: .9375rem;
  line-height: 1.85;
  color: #8FB3CE;
}
.footer-sync {
  margin-top: 1.1rem;
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-size: .8125rem;
  letter-spacing: .1em;
  color: #9FC0DA;
}
.footer-sync .mono { color: var(--c-neon); }

.footer-heading {
  margin-bottom: 1rem;
  font-family: var(--font-body);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .3em;
  color: var(--c-neon);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: .6rem;
}
.footer-link {
  display: inline-block;
  font-size: .9375rem;
  color: #B6CFE3;
  transition: color .2s var(--ease), padding-left .2s var(--ease);
}
.footer-link:hover,
.footer-link:focus-visible {
  color: var(--c-neon);
  padding-left: .35rem;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: .95rem;
}
.contact-list__item {
  display: flex;
  flex-direction: column;
  gap: .2rem;
}
.contact-list__label {
  font-size: .75rem;
  letter-spacing: .22em;
  color: #7FA5C2;
}
.contact-list__value {
  font-size: .9375rem;
  line-height: 1.7;
  color: #D5E6F3;
}

.copy-line {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  align-self: flex-start;
  padding-bottom: 1px;
  font-size: .9375rem;
  color: #D5E6F3;
  border-bottom: 1px dashed rgba(183, 211, 232, .5);
  text-align: left;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.copy-line::after {
  content: "复制";
  font-family: var(--font-body);
  font-size: .6875rem;
  letter-spacing: .16em;
  color: var(--c-neon);
  opacity: .7;
  transition: opacity .2s var(--ease), color .2s var(--ease);
}
.copy-line:hover,
.copy-line:focus-visible {
  color: #FFFFFF;
  border-color: var(--c-neon);
}
.copy-line:hover::after { opacity: 1; }
.copy-line.is-copied { color: var(--c-neon-soft); border-color: var(--c-warm); }
.copy-line.is-copied::after { content: "已复制"; color: var(--c-warm); opacity: 1; }

.footer-base {
  border-top: 1px solid rgba(183, 211, 232, .18);
  background: rgba(6, 26, 47, .55);
  padding: 1.4rem 0 1.7rem;
}
.footer-base__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: .6rem 1.6rem;
  font-size: .8125rem;
  letter-spacing: .06em;
  color: #7FA5C2;
}
.footer-base__icp { font-family: var(--font-mono); color: #9FC0DA; }

/* ---------- to top ---------- */
.to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 70;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  font-size: 1.05rem;
  color: var(--c-neon);
  background: rgba(11, 42, 74, .92);
  border: 1px solid rgba(49, 224, 208, .45);
  border-radius: 50%;
  box-shadow: 0 12px 30px -16px rgba(6, 26, 47, .9);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s var(--ease), background .2s var(--ease), color .2s var(--ease);
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--c-neon); color: var(--c-deep); }

/* ---------- reveal ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .55s var(--ease), transform .55s var(--ease);
}
.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .grid--split { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .nav-cta { display: none; }

  .primary-nav {
    position: fixed;
    inset: 0 0 0 auto;
    z-index: 80;
    width: min(86vw, 340px);
    padding: 4.6rem 1.5rem 2.5rem;
    overflow-y: auto;
    overscroll-behavior: contain;
    background: linear-gradient(180deg, #0B2A4A 0%, #061A2F 100%);
    border-left: 1px solid rgba(49, 224, 208, .28);
    box-shadow: -26px 0 64px -32px rgba(0, 0, 0, .82);
    transform: translateX(103%);
    transition: transform .34s var(--ease);
  }
  .primary-nav[data-open] { transform: translateX(0); }

  .primary-nav__title {
    display: block;
    margin-bottom: 1rem;
    padding-bottom: .7rem;
    border-bottom: 1px solid rgba(183, 211, 232, .25);
    font-family: var(--font-body);
    font-size: .75rem;
    letter-spacing: .32em;
    color: var(--c-neon);
  }
  .primary-nav__list {
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: stretch;
    gap: .15rem;
  }
  .primary-nav__link {
    display: block;
    padding: .85rem .9rem;
    font-size: 1.0625rem;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius-s) var(--radius-s) 0;
  }
  .primary-nav__link[aria-current="page"] {
    border: 0;
    border-left: 2px solid var(--c-neon);
    border-radius: 0 var(--radius-s) var(--radius-s) 0;
    background: rgba(49, 224, 208, .1);
  }

  .nav-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    font-size: 1.3rem;
    line-height: 1;
    color: #CBDFF0;
    border: 1px solid rgba(183, 211, 232, .4);
    border-radius: 50%;
    transition: color .2s var(--ease), border-color .2s var(--ease);
  }
  .nav-close:hover { color: var(--c-neon); border-color: var(--c-neon); }
}

@media (min-width: 901px) {
  .nav-scrim { display: none; }
}

@media (max-width: 640px) {
  .shell { width: min(100% - 2rem, var(--shell-w)); }

  .header-utility__tag { display: none; }
  .header-utility__inner { justify-content: flex-end; }

  .masthead { padding: 1.1rem 0 1rem; }
  .masthead__inner { flex-direction: column; gap: .35rem; }
  .masthead__rule { display: none; }
  .masthead__brand {
    flex-direction: column;
    align-items: center;
    gap: .3rem;
  }
  .masthead__brand-cn { letter-spacing: .18em; }
  .masthead__brand-tail {
    padding-left: 0;
    border-left: 0;
    letter-spacing: .34em;
  }

  .navbar__inner { min-height: 52px; }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-base__inner { flex-direction: column; align-items: flex-start; }

  .to-top { width: 40px; height: 40px; }
}

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

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

  .js-ready [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .panel:hover { transform: none; }
  .to-top { transform: none; }
  .primary-nav { transition: none; }
}