/* ==========================================================================
   必发体验中心 · 共享站点样式 /assets/site.css
   01 Reset  02 Tokens  03 Base  04 Utilities  05 Buttons  06 Header
   07 Footer 08 Legacy Drawer  09 Components  10 Motion & Responsive
   ========================================================================== */

/* 01 Reset ---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul[class], ol[class] { list-style: none; padding: 0; }
img, svg, video { max-width: 100%; display: block; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; }
table { border-collapse: collapse; width: 100%; }

/* 02 Tokens --------------------------------------------------------------- */
:root {
  --ink-900: #0B1B2B;
  --ink-850: #081521;
  --ink-800: #102A42;
  --line: #1E3A52;
  --line-soft: rgba(30, 58, 82, 0.62);
  --amber: #E0A33E;
  --amber-soft: #F2C97A;
  --ice: #7FB6D9;
  --ice-soft: #C9E4F0;
  --signal: #FF5A2B;
  --paper: #F4EFE6;
  --text: #EAF1F6;
  --muted: #9FB2C2;

  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC",
    "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI",
    Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", ui-monospace,
    "Cascadia Mono", Menlo, Consolas, monospace;

  --shell-max: 1300px;
  --gutter: clamp(18px, 4.2vw, 56px);
  --gap: clamp(16px, 2.4vw, 32px);
  --header-h: 78px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* 03 Base ----------------------------------------------------------------- */
body {
  background-color: var(--ink-900);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16.5px;
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--text);
}
h1 { font-size: clamp(30px, 4.6vw, 64px); }
h2 { font-size: clamp(24px, 3vw, 40px); }
h3 { font-size: clamp(19px, 2vw, 24px); line-height: 1.3; letter-spacing: -0.01em; }
h4 { font-size: 18px; line-height: 1.4; font-weight: 700; }

p { max-width: 38em; }

a { color: var(--ice-soft); text-decoration: none; transition: color 0.18s var(--ease); }
a:hover { color: var(--amber-soft); }

strong, b { font-weight: 700; color: var(--amber-soft); }
code, kbd, samp {
  font-family: var(--font-mono);
  font-size: 0.88em;
  letter-spacing: 0.04em;
  color: var(--ice-soft);
}

::selection { background: var(--amber); color: #0B1B2B; }

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

#main-content {
  display: block;
  padding-top: var(--header-h);
  min-height: 60vh;
}

/* 04 Utilities ------------------------------------------------------------ */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1200;
  transform: translateY(-180%);
  background: var(--amber);
  color: #0B1B2B;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 1px solid var(--amber-soft);
  transition: transform 0.18s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

.shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

.section {
  position: relative;
  padding-block: clamp(48px, 7vw, 104px);
}
.section--band {
  background-color: var(--ink-800);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section--paper {
  background-color: var(--paper);
  color: #16222E;
  --text: #16222E;
  --muted: #5B6875;
  --line: #D8CDBC;
  --ice-soft: #1E4A66;
  --amber: #A9711A;
  --amber-soft: #8A5A0F;
}

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(24px, 4vw, 44px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--amber);
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
}

.coord {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.rule {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--line);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ice-soft);
  white-space: nowrap;
}
.tag--amber { border-color: rgba(224, 163, 62, 0.55); color: var(--amber-soft); }
.tag--signal { border-color: rgba(255, 90, 43, 0.55); color: #FF8266; }

.prose {
  max-width: 34em;
  line-height: 1.85;
}
.prose p { max-width: none; }
.prose p + p { margin-top: 1.2em; }
.prose h3 { margin-top: 2em; margin-bottom: 0.6em; }
.prose ul, .prose ol { margin: 1em 0; padding-left: 1.25em; }
.prose ul { list-style: square; }
.prose ol { list-style: decimal; }
.prose li { margin: 0.4em 0; }
.prose li::marker { color: var(--amber); }

.breadcrumb {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 18px var(--gutter) 0;
}
.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.breadcrumb__item { display: flex; align-items: center; gap: 8px; }
.breadcrumb__link {
  color: var(--muted);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.breadcrumb__link:hover { color: var(--amber-soft); border-bottom-color: var(--amber); }
.breadcrumb__sep { color: var(--line); }
.breadcrumb__current { color: var(--amber); }

.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--line);
  background-color: var(--ink-800);
  background-image:
    linear-gradient(180deg, rgba(127, 182, 217, 0.1), rgba(127, 182, 217, 0) 62%),
    repeating-linear-gradient(0deg, var(--line) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 48px);
}
.media-frame > img,
.media-frame > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }
.media-frame__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 12px;
  background: rgba(11, 27, 43, 0.86);
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--ice-soft);
}
.media-frame__tag {
  position: absolute;
  top: 0;
  left: 0;
  padding: 6px 10px;
  background: var(--amber);
  color: #0B1B2B;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

/* 05 Buttons -------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease),
    border-color 0.18s var(--ease), transform 0.18s var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn--amber {
  background: var(--amber);
  border-color: var(--amber);
  color: #101C28;
}
.btn--amber:hover {
  background: var(--amber-soft);
  border-color: var(--amber-soft);
  color: #101C28;
}
.btn--line {
  background: transparent;
  border-color: rgba(224, 163, 62, 0.55);
  color: var(--amber-soft);
}
.btn--line:hover {
  background: rgba(224, 163, 62, 0.1);
  border-color: var(--amber);
  color: var(--amber-soft);
}
.btn--sm { padding: 9px 16px; font-size: 13.5px; }

/* 06 Header --------------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 600;
  height: var(--header-h);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color 0.22s var(--ease), border-color 0.22s var(--ease);
}
.site-header[data-stuck="true"] {
  background-color: rgba(11, 27, 43, 0.97);
  border-bottom-color: var(--line);
}

.site-header__inner {
  height: 100%;
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.6vw, 40px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--text);
}
.brand__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--amber);
  color: var(--amber);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.brand__mark::after {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid rgba(224, 163, 62, 0.28);
  pointer-events: none;
}
.brand:hover .brand__mark { border-color: var(--amber-soft); color: var(--amber-soft); }
.brand__text { display: flex; flex-direction: column; gap: 3px; line-height: 1; }
.brand__name { font-size: 16px; font-weight: 900; letter-spacing: 0.02em; }
.brand__meta {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.site-nav { flex: 1 1 auto; display: flex; justify-content: center; min-width: 0; }
.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.7vw, 26px);
}
.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  padding: 7px 2px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  transition: color 0.18s var(--ease);
}
.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.18s var(--ease);
}
.site-nav__link:hover { color: var(--amber-soft); }
.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }
.site-nav__link[aria-current="page"] { color: var(--amber-soft); }
.site-nav__idx {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  color: var(--amber);
  opacity: 0.85;
  transform: translateY(-1px);
}
.site-nav__foot { display: none; }
.site-nav__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
}
.site-nav__cta { display: none; }

.header-actions {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
}
.header-actions__cta { display: inline-flex; }

.header-legacy {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 2px;
  border-bottom: 1px solid transparent;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.header-legacy__dot {
  width: 5px;
  height: 5px;
  background: var(--signal);
  display: inline-block;
}
.header-legacy:hover { color: var(--amber-soft); border-bottom-color: var(--amber); }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.18s var(--ease);
}
.nav-toggle:hover { border-color: var(--amber); }
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 1px;
  background: var(--text);
  transition: background-color 0.18s var(--ease);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1px;
  background: var(--text);
  transition: transform 0.2s var(--ease);
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  transform: translateY(-6px) rotate(-45deg);
}

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--amber), var(--signal));
  transform: scaleX(0);
  transform-origin: left center;
}

/* 07 Footer --------------------------------------------------------------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 132px);
  background-color: var(--ink-850);
  border-top: 1px solid var(--line);
  color: var(--text);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--amber), rgba(224, 163, 62, 0) 58%);
  opacity: 0.7;
}

.site-footer__grid {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 76px) var(--gutter) clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 1.25fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.footer-brand .brand { margin-bottom: 20px; }
.footer-brand__line {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 26em;
}
.footer-brand__coord {
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0.7;
}

.footer-col__title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.4;
}
.footer-col__title::before {
  content: "";
  width: 14px;
  height: 1px;
  background: var(--amber);
  flex: 0 0 auto;
}

.footer-links { display: grid; gap: 2px; }
.footer-links a {
  position: relative;
  display: inline-flex;
  width: fit-content;
  padding: 6px 0;
  font-size: 15px;
  color: var(--text);
  transition: color 0.18s var(--ease);
}
.footer-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 3px;
  height: 1px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.18s var(--ease);
}
.footer-links a:hover { color: var(--amber-soft); }
.footer-links a:hover::after { transform: scaleX(1); }

.footer-contact { display: grid; gap: 14px; }
.footer-contact__row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}
.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}
.footer-contact__value { font-size: 15px; color: var(--text); word-break: break-word; }
.footer-contact__value--mono {
  font-family: var(--font-mono);
  font-size: 13.5px;
  letter-spacing: 0.04em;
}

.footer-note {
  margin-top: 20px;
  padding-left: 12px;
  border-left: 1px solid var(--amber);
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 30em;
}

.site-footer__base {
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 18px var(--gutter);
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.footer-base__copy { color: var(--muted); }
.footer-base__icp { color: var(--muted); }
.footer-legal {
  margin-left: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
}
.footer-legal a {
  color: var(--muted);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.footer-legal a:hover { color: var(--amber-soft); border-bottom-color: var(--amber); }

/* 08 Legacy Drawer -------------------------------------------------------- */
.legacy-fab {
  position: fixed;
  right: 0;
  bottom: 104px;
  z-index: 800;
  padding: 16px 10px;
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-right: 0;
  color: var(--amber);
  cursor: pointer;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease),
    transform 0.18s var(--ease);
}
.legacy-fab__text {
  display: block;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.24em;
  line-height: 1;
}
.legacy-fab:hover {
  border-color: var(--amber);
  color: var(--amber-soft);
  transform: translateY(-2px);
}

.legacy-scrim {
  position: fixed;
  inset: 0;
  z-index: 880;
  background: rgba(4, 10, 16, 0.66);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s var(--ease), visibility 0.2s;
}
.legacy-scrim[data-open="true"] { opacity: 1; visibility: visible; }

.legacy-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 900;
  width: min(430px, 92vw);
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: clamp(22px, 4vw, 32px);
  overflow-y: auto;
  background: var(--ink-800);
  border-left: 1px solid var(--line);
  box-shadow: -24px 0 48px rgba(4, 10, 16, 0.45);
  transform: translateX(101%);
  visibility: hidden;
  transition: transform 0.24s var(--ease), visibility 0.24s;
}
.legacy-drawer[data-open="true"] { transform: none; visibility: visible; }

.legacy-drawer__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.legacy-drawer__eyebrow {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 8px;
}
.legacy-drawer__title { font-size: 26px; letter-spacing: -0.01em; }
.legacy-drawer__close {
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.legacy-drawer__close:hover { color: var(--signal); border-color: var(--signal); }

.legacy-drawer__intro {
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  max-width: none;
}

.legacy-list { margin-top: 20px; display: grid; gap: 0; }
.legacy-list__item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--line-soft);
}
.legacy-list__ver {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--amber);
}
.legacy-list__desc { font-size: 14px; line-height: 1.7; color: var(--ice-soft); }

.legacy-drawer__link {
  margin-top: 24px;
  align-self: flex-start;
}

/* 09 Motion & Responsive -------------------------------------------------- */
@media (max-width: 1040px) {
  .nav-toggle { display: inline-flex; }
  .header-legacy { display: none; }

  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    z-index: 610;
    display: block;
    flex: none;
    padding: 10px var(--gutter) 26px;
    background: var(--ink-800);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    max-height: calc(100dvh - var(--header-h));
    overflow-y: auto;
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s var(--ease), transform 0.2s var(--ease),
      visibility 0.2s;
  }
  .site-nav[data-open="true"] {
    transform: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  .site-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav__item + .site-nav__item { border-top: 1px solid var(--line-soft); }
  .site-nav__link {
    width: 100%;
    padding: 16px 0;
    font-size: 17px;
    justify-content: flex-start;
  }
  .site-nav__link::after { display: none; }
  .site-nav__link[aria-current="page"] { color: var(--amber); }
  .site-nav__link[aria-current="page"] .site-nav__idx { color: var(--amber-soft); }
  .site-nav__idx { font-size: 10.5px; }

  .site-nav__foot {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px solid var(--line-soft);
  }
  .site-nav__cta { display: inline-flex; }

  .site-footer__grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .col-3, .col-4, .col-5 { grid-column: span 6; }
  .col-7, .col-8, .col-9 { grid-column: span 12; }
}

@media (max-width: 720px) {
  :root { --header-h: 62px; }
  body { font-size: 16px; }
  .brand__mark { width: 34px; height: 34px; font-size: 12px; }
  .brand__name { font-size: 15px; }
  .brand__meta { font-size: 9px; letter-spacing: 0.18em; }
}

@media (max-width: 640px) {
  .header-actions__cta { display: none; }
  .site-footer__grid { grid-template-columns: 1fr; }
  .footer-legal { margin-left: 0; }
  .legacy-fab { bottom: 24px; padding: 12px 8px; }
  .legacy-list__item { grid-template-columns: 1fr; gap: 4px; }
}

@media (max-width: 600px) {
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9 { grid-column: span 12; }
  .tag { font-size: 9.5px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

html.is-nav-open,
html.is-drawer-open { overflow: hidden; }