/* ============================================================
   乐盈登录 · 共享样式表 /assets/site.css
   高原坐标索引体系：墨海底 + 湖蓝渐变 + 琥珀金路径锚点
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 148px;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-900);
  background-color: var(--mist-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

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

:focus-visible {
  outline: 2px solid var(--amber-500);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- 2. Tokens ---------- */
:root {
  --ink-900: #0B0F1A;
  --ink-700: #232A3A;
  --lake-700: #0B4F6C;
  --lake-500: #12799F;
  --lake-200: #BFE0EE;
  --dusk-700: #3A2A5C;
  --dusk-500: #5B4185;
  --amber-500: #F0A93B;
  --amber-200: #FFD79A;
  --mist-50: #F7F5F0;
  --jade-500: #2C8C7D;
  --slate-500: #6B7280;

  --font-display: "HarmonyOS Sans SC", "Noto Sans SC", "Source Han Sans SC", "PingFang SC", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --shell: 1280px;
  --gutter: clamp(18px, 4vw, 40px);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 12px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --header-top-h: 76px;
  --header-nav-h: 56px;
  --hairline: rgba(11, 15, 26, 0.12);
  --hairline-light: rgba(191, 224, 238, 0.18);
}

/* ---------- 3. Layout ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  position: relative;
  padding-block: clamp(56px, 7vw, 104px);
}

.section--dark {
  color: var(--mist-50);
  background:
    radial-gradient(120% 140% at 6% 0%, rgba(18, 121, 159, 0.55) 0%, rgba(18, 121, 159, 0) 58%),
    linear-gradient(158deg, var(--ink-900) 0%, var(--lake-700) 74%, var(--dusk-700) 100%);
}

.section--tint {
  background:
    linear-gradient(180deg, rgba(191, 224, 238, 0.45) 0%, rgba(247, 245, 240, 0) 100%);
}

.section-head {
  max-width: 66ch;
  margin-bottom: clamp(24px, 3vw, 42px);
}

.grid {
  display: grid;
  gap: clamp(16px, 2vw, 28px);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--split { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }

.divider {
  height: 1px;
  border: 0;
  margin-block: clamp(28px, 4vw, 56px);
  background: var(--hairline);
}

/* ---------- 4. Type ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lake-700);
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--amber-500);
}

.section--dark .eyebrow { color: var(--amber-200); }

.display-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 6.6vw, 88px);
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.2vw, 48px);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.lede {
  max-width: 62ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--slate-500);
}

.section--dark .lede { color: rgba(247, 245, 240, 0.74); }

.mono {
  font-family: var(--font-mono);
  font-size: 0.92em;
  letter-spacing: 0.04em;
}

.prose {
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.85;
}

.prose p + p { margin-top: 1.2em; }

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  line-height: 1.2;
  margin-top: 1.6em;
  margin-bottom: 0.5em;
}

.prose h2 { font-size: clamp(24px, 2.6vw, 32px); }
.prose h3 { font-size: clamp(19px, 2vw, 24px); }

.prose ul {
  display: flex;
  flex-direction: column;
  gap: 0.55em;
  margin-top: 1em;
}

.prose li {
  position: relative;
  padding-left: 1.3em;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--amber-500);
}

.prose a {
  color: var(--lake-500);
  border-bottom: 1px solid rgba(18, 121, 159, 0.45);
}

.prose a:hover { border-bottom-color: var(--amber-500); }

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  transition: transform 0.18s var(--ease), background-color 0.18s var(--ease),
    border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--amber {
  background: var(--amber-500);
  color: var(--ink-900);
  box-shadow: 0 10px 24px -12px rgba(240, 169, 59, 0.95);
}

.btn--amber:hover { background: var(--amber-200); }

.btn--quiet {
  background: transparent;
  color: var(--mist-50);
  border-color: rgba(247, 245, 240, 0.3);
}

.btn--quiet:hover {
  border-color: var(--amber-500);
  color: var(--amber-200);
  background: rgba(240, 169, 59, 0.12);
}

.btn--sm {
  padding: 8px 16px;
  font-size: 13px;
}

/* ---------- 6. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 300;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--amber-500);
  color: var(--ink-900);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  transform: translateY(-160%);
  transition: transform 0.18s var(--ease);
}

.skip-link:focus-visible { transform: translateY(0); }

/* ---------- 7. Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
}

.scroll-progress {
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  z-index: 2;
  pointer-events: none;
}

.scroll-progress__bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--amber-500) 0%, var(--amber-200) 100%);
  transition: width 0.12s linear;
}

.header-top {
  position: relative;
  color: var(--mist-50);
  border-bottom: 1px solid var(--hairline-light);
  background:
    radial-gradient(120% 170% at 4% 0%, rgba(18, 121, 159, 0.62) 0%, rgba(18, 121, 159, 0) 56%),
    linear-gradient(104deg, var(--ink-900) 0%, var(--lake-700) 58%, var(--dusk-700) 100%);
}

.header-top::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image: repeating-linear-gradient(
    114deg,
    rgba(255, 255, 255, 0.055) 0 1px,
    rgba(255, 255, 255, 0) 1px 8px
  );
}

.header-top__inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  min-height: var(--header-top-h);
  padding-block: 12px;
  transition: min-height 0.22s var(--ease), padding 0.22s var(--ease);
}

/* Brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  min-width: 0;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: var(--amber-500);
  color: var(--ink-900);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.02em;
  box-shadow: inset 0 0 0 1px rgba(255, 215, 154, 0.7);
  transition: width 0.22s var(--ease), height 0.22s var(--ease);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  line-height: 1.16;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.brand__tagline {
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: rgba(247, 245, 240, 0.66);
  white-space: nowrap;
}

/* Quick links */
.quick-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  min-width: 0;
}

.quick-link {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  color: rgba(247, 245, 240, 0.84);
  white-space: nowrap;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.quick-link:hover {
  color: var(--amber-200);
  border-color: rgba(255, 215, 154, 0.45);
  background: rgba(255, 215, 154, 0.1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

/* Nav toggle */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border: 1px solid rgba(247, 245, 240, 0.32);
  border-radius: 999px;
  color: var(--mist-50);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.nav-toggle:hover {
  border-color: var(--amber-500);
  background: rgba(240, 169, 59, 0.12);
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-toggle__label {
  font-size: 13px;
  letter-spacing: 0.06em;
}

/* Lower nav */
.header-nav {
  position: relative;
  border-bottom: 1px solid var(--hairline);
  background: rgba(247, 245, 240, 0.94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.header-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: var(--header-nav-h);
  transition: min-height 0.22s var(--ease);
}

.primary-nav { min-width: 0; }

.primary-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.primary-nav__item { display: block; }

.primary-nav__link {
  position: relative;
  display: inline-block;
  padding: 10px 15px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-700);
  white-space: nowrap;
  transition: color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.primary-nav__link::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--amber-500);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.22s var(--ease);
}

.primary-nav__link:hover {
  color: var(--lake-700);
  background: rgba(191, 224, 238, 0.44);
}

.primary-nav__link[aria-current="page"] {
  color: var(--ink-900);
  font-weight: 800;
}

.primary-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.header-nav__coord {
  flex: 0 0 auto;
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--slate-500);
  white-space: nowrap;
}

/* Compact header */
.site-header[data-compact="true"] .header-top__inner {
  min-height: 58px;
  padding-block: 7px;
}

.site-header[data-compact="true"] .brand__mark {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  font-size: 13px;
}

.site-header[data-compact="true"] .brand__name { font-size: 17px; }
.site-header[data-compact="true"] .brand__tagline { display: none; }

.site-header[data-compact="true"] .quick-links .quick-link:nth-child(3) { display: none; }

.site-header[data-compact="true"] .header-nav__inner { min-height: 48px; }

/* ---------- 8. Footer ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  color: rgba(247, 245, 240, 0.78);
  background:
    radial-gradient(90% 120% at 88% 8%, rgba(91, 65, 133, 0.42) 0%, rgba(91, 65, 133, 0) 60%),
    linear-gradient(178deg, var(--ink-900) 0%, #0A1220 44%, var(--dusk-700) 100%);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--amber-500) 0%, rgba(240, 169, 59, 0) 64%);
}

.footer__grid {
  display: grid;
  grid-template-columns: minmax(230px, 1.45fr) repeat(3, minmax(120px, 0.8fr)) minmax(240px, 1.35fr);
  gap: clamp(24px, 3vw, 48px);
  padding-block: clamp(46px, 6vw, 76px) clamp(30px, 4vw, 46px);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.brand--footer { color: var(--mist-50); }
.brand--footer .brand__name { color: var(--mist-50); }

.footer__about {
  max-width: 34ch;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 245, 240, 0.62);
}

.footer__stamp {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--lake-200);
  opacity: 0.7;
}

.footer__col { min-width: 0; }

.footer__col-title {
  margin-bottom: 14px;
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--amber-200);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__link {
  display: inline-block;
  font-size: 14.5px;
  color: rgba(247, 245, 240, 0.76);
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.footer__link:hover {
  color: var(--amber-200);
  border-bottom-color: rgba(240, 169, 59, 0.7);
}

/* Contact block */
.footer__contact-toggle {
  display: none;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
  padding: 12px 16px;
  border: 1px solid rgba(191, 224, 238, 0.28);
  border-radius: 14px;
  background: rgba(191, 224, 238, 0.06);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--amber-200);
  text-align: left;
  transition: border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.footer__contact-toggle::after {
  content: "⌄";
  font-size: 15px;
  line-height: 1;
  transition: transform 0.22s var(--ease);
}

.footer__contact-toggle[aria-expanded="true"]::after { transform: rotate(180deg); }

.footer__contact-toggle:hover {
  border-color: var(--amber-500);
  background: rgba(240, 169, 59, 0.12);
}

.footer__contact {
  display: block;
  border-top: 1px solid rgba(191, 224, 238, 0.16);
}

.contact-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 10px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(191, 224, 238, 0.16);
  font-size: 14px;
}

.contact-item__label {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--lake-200);
  opacity: 0.85;
}

.contact-item__value {
  flex: 1 1 auto;
  min-width: 0;
  color: rgba(247, 245, 240, 0.9);
  line-height: 1.6;
  word-break: break-word;
}

.contact-item__value--mono {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.03em;
}

.copy-btn {
  flex: 0 0 auto;
  padding: 3px 10px;
  border: 1px solid rgba(191, 224, 238, 0.32);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--lake-200);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.copy-btn:hover {
  color: var(--amber-200);
  border-color: var(--amber-500);
  background: rgba(240, 169, 59, 0.12);
}

.copy-btn[data-copied="true"] {
  color: var(--ink-900);
  background: var(--amber-500);
  border-color: var(--amber-500);
}

.copy-status {
  min-height: 1.4em;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--amber-200);
}

.footer__contact-note {
  max-width: 36ch;
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.75;
  color: rgba(247, 245, 240, 0.56);
}

/* Legal bar */
.footer__legal {
  border-top: 1px solid rgba(191, 224, 238, 0.16);
  background: rgba(11, 15, 26, 0.6);
}

.footer__legal-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  padding-block: 16px;
}

.footer__legal-text {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: rgba(247, 245, 240, 0.62);
}

.footer__legal-text--muted { color: rgba(247, 245, 240, 0.42); }

.footer__top { margin-left: auto; }

/* ---------- 9. Cards / chips / index / media ---------- */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.4vw, 30px);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  background: var(--mist-50);
  transition: transform 0.2s var(--ease), border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--amber-500);
  box-shadow: 0 20px 44px -32px rgba(11, 79, 108, 0.95);
}

.card--dark {
  color: var(--mist-50);
  background: rgba(35, 42, 58, 0.74);
  border-color: var(--hairline-light);
}

.card__title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.3;
}

.card__meta {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--slate-500);
}

.card--dark .card__meta { color: var(--lake-200); }

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid rgba(11, 15, 26, 0.18);
  border-radius: 999px;
  background: rgba(247, 245, 240, 0.72);
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink-700);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.chip:hover {
  border-color: var(--amber-500);
  color: var(--ink-900);
}

.chip.is-active,
.chip[aria-pressed="true"] {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--amber-200);
}

.chip__count {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  opacity: 0.72;
}

.anchor-index {
  position: sticky;
  top: calc(var(--header-nav-h) + 28px);
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 16px;
  border-left: 1px solid var(--hairline);
}

.anchor-index__link {
  display: block;
  padding: 7px 0;
  border-bottom: 2px solid transparent;
  font-size: 14px;
  color: var(--slate-500);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.anchor-index__link:hover { color: var(--ink-900); }

.anchor-index__link[aria-current="true"] {
  color: var(--ink-900);
  font-weight: 700;
  border-bottom-color: var(--amber-500);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--slate-500);
}

.breadcrumbs__item { display: inline-flex; align-items: center; gap: 8px; }

.breadcrumbs__link {
  color: var(--lake-700);
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.breadcrumbs__link:hover {
  color: var(--lake-500);
  border-bottom-color: var(--amber-500);
}

.breadcrumbs__sep { color: rgba(11, 15, 26, 0.28); }
.breadcrumbs__current { color: var(--ink-900); }

/* Image containers */
.media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid rgba(191, 224, 238, 0.24);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(80% 120% at 12% 0%, rgba(18, 121, 159, 0.9) 0%, rgba(18, 121, 159, 0) 62%),
    linear-gradient(136deg, var(--lake-700) 0%, var(--dusk-700) 64%, var(--ink-900) 100%);
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.6;
  background-image: repeating-linear-gradient(
    120deg,
    rgba(255, 255, 255, 0.07) 0 1px,
    rgba(255, 255, 255, 0) 1px 10px
  );
}

.media img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--wide { aspect-ratio: 21 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 4 / 5; }

.media__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--slate-500);
}

/* ---------- 10. Motion ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

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

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

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

  .btn:hover,
  .card:hover { transform: none; }

  .scroll-progress__bar { transition: none; }
}

/* ---------- 11. Responsive ---------- */
@media (max-width: 1199px) {
  .footer__grid {
    grid-template-columns: minmax(0, 1.3fr) repeat(3, minmax(0, 1fr));
  }

  .footer__col--contact {
    grid-column: 1 / -1;
    padding-top: 8px;
    border-top: 1px solid rgba(191, 224, 238, 0.16);
  }

  .footer__contact { border-top: 0; }
}

@media (max-width: 1023px) {
  .quick-link { padding: 8px 11px; font-size: 13.5px; }
  .primary-nav__link { padding: 9px 11px; font-size: 14.5px; }
  .header-nav__coord { display: none; }
}

@media (max-width: 899px) {
  .nav-toggle { display: inline-flex; }

  .header-top__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px;
    min-height: 0;
    padding-block: 11px 10px;
  }

  .brand { grid-column: 1; grid-row: 1; }
  .header-actions { grid-column: 2; grid-row: 1; margin-left: 0; gap: 8px; }
  .quick-links { grid-column: 1 / -1; grid-row: 2; margin-left: 0; }

  .brand__tagline { display: none; }
  .brand__mark { width: 36px; height: 36px; border-radius: 12px; font-size: 13px; }
  .brand__name { font-size: 17px; }

  .quick-links {
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 2px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .quick-links::-webkit-scrollbar { display: none; }

  .quick-link {
    flex: 0 0 auto;
    padding: 6px 12px;
    border-color: rgba(191, 224, 238, 0.26);
    font-size: 13px;
  }

  .header-actions .btn { padding: 9px 16px; font-size: 14px; }

  .header-nav {
    max-height: 0;
    overflow: hidden;
    border-bottom-color: transparent;
    transition: max-height 0.34s var(--ease), border-color 0.2s var(--ease);
  }

  .header-nav[data-open="true"] {
    max-height: 560px;
    border-bottom-color: var(--hairline);
  }

  .header-nav__inner {
    flex-direction: column;
    align-items: stretch;
    min-height: 0;
    padding-block: 6px 18px;
  }

  .primary-nav__list {
    flex-direction: column;
    gap: 6px;
  }

  .primary-nav__link {
    display: block;
    padding: 12px 16px 12px 20px;
    border: 1px solid rgba(11, 15, 26, 0.12);
    border-radius: 16px;
    font-size: 15.5px;
  }

  .primary-nav__link::after {
    left: 8px;
    right: auto;
    top: 50%;
    bottom: auto;
    width: 3px;
    height: 18px;
    transform: translateY(-50%) scaleY(0);
    transform-origin: center;
  }

  .primary-nav__link[aria-current="page"] {
    border-color: rgba(240, 169, 59, 0.72);
    background: rgba(240, 169, 59, 0.12);
  }

  .primary-nav__link[aria-current="page"]::after {
    transform: translateY(-50%) scaleY(1);
  }

  .header-nav__coord {
    display: block;
    padding: 12px 4px 0;
    font-size: 10.5px;
  }

  .grid--2,
  .grid--3,
  .grid--split { grid-template-columns: minmax(0, 1fr); }

  .footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 20px;
  }

  .footer__brand { grid-column: 1 / -1; }

  .footer__col--contact { grid-column: 1 / -1; }

  .footer__contact-toggle { display: flex; }

  .footer__contact[data-contact] { display: none; }
  .footer__contact[data-contact][data-open="true"] { display: block; }

  .anchor-index {
    position: static;
    flex-direction: row;
    gap: 8px;
    overflow-x: auto;
    padding: 0 0 8px;
    border-left: 0;
    scrollbar-width: none;
  }

  .anchor-index::-webkit-scrollbar { display: none; }

  .anchor-index__link {
    flex: 0 0 auto;
    padding: 7px 14px;
    border: 1px solid rgba(11, 15, 26, 0.16);
    border-radius: 999px;
    font-size: 13px;
  }

  .anchor-index__link[aria-current="true"] {
    background: var(--ink-900);
    border-color: var(--ink-900);
    color: var(--amber-200);
  }

  html { scroll-padding-top: 132px; }
}

@media (max-width: 599px) {
  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__legal-inner { gap: 8px 14px; }
  .footer__top { margin-left: 0; }
  .card { border-radius: var(--radius-md); }
  .media { border-radius: var(--radius-md); }
}