/* =========================================================
   千嬴国际官网 · 共享样式 /assets/site.css
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1100px 620px at 82% -14%, rgba(201, 162, 39, 0.10), transparent 62%),
    radial-gradient(900px 520px at -10% 6%, rgba(47, 143, 124, 0.10), transparent 60%),
    var(--indigo-900);
  color: var(--moon);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

a {
  color: var(--gold-soft);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

:target { scroll-margin-top: 104px; }

/* ---------- tokens ---------- */
:root {
  --indigo-900: #0C1430;
  --indigo-800: #101940;
  --indigo-700: #17204A;
  --steel: #2A3350;
  --gold: #C9A227;
  --gold-soft: #EBD08A;
  --gold-deep: #7E6410;
  --cinnabar: #C2402F;
  --jade: #2F8F7C;
  --jade-soft: #8FD7C6;
  --moon: #F2EEE3;
  --ink: #14161E;
  --ash: #9AA3B8;

  --surface: var(--indigo-900);
  --surface-2: var(--indigo-700);
  --text: var(--moon);
  --text-muted: var(--ash);
  --rule: var(--steel);
  --accent: var(--gold);

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

  --shell: 1240px;
  --gutter: 24px;
  --gap: 24px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --t-fast: 160ms;
  --t-mid: 240ms;
  --t-slow: 400ms;
}

/* ---------- base typography ---------- */
h1, .h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.16;
  letter-spacing: -0.01em;
}

h2, .h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.24;
  letter-spacing: -0.01em;
}

h3, .h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 30px);
  line-height: 1.32;
  letter-spacing: -0.005em;
}

h4, .h4 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.4;
}

p + p { margin-top: 16px; }

strong { font-weight: 600; }

::selection {
  background: rgba(201, 162, 39, 0.32);
  color: var(--moon);
}

/* ---------- focus ---------- */
:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(12, 20, 48, 0.92);
}

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

.mono {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--gold);
  line-height: 1.4;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--gold);
  flex: 0 0 auto;
}

.rule {
  height: 1px;
  border: 0;
  background: var(--rule);
  opacity: 0.9;
}

.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ---------- skip link ---------- */
.skip-link {
  position: absolute;
  left: 50%;
  top: 10px;
  transform: translate(-50%, -180%);
  z-index: 200;
  padding: 10px 22px;
  background: var(--gold);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 2px;
  transition: transform var(--t-fast) var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible {
  transform: translate(-50%, 0);
  outline: 2px solid var(--moon);
  outline-offset: 2px;
}

/* ---------- header ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(12, 20, 48, 0.86);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  backdrop-filter: blur(14px) saturate(120%);
  border-bottom: 1px solid var(--steel);
  box-shadow: 0 1px 0 rgba(201, 162, 39, 0.16), 0 16px 34px -26px rgba(0, 0, 0, 0.95);
}

.masthead__frame {
  position: relative;
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 78px;
  padding-left: 36px;
}

/* 左侧纵向索引轨：鎏金起头 + 细刻度 */
.masthead__frame::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(to bottom,
    var(--gold) 0 26px,
    var(--steel) 26px 100%);
}

.masthead__frame::after {
  content: "";
  position: absolute;
  left: 0;
  top: 44px;
  bottom: 16px;
  width: 6px;
  background: repeating-linear-gradient(to bottom,
    var(--steel) 0 1px,
    transparent 1px 8px);
  opacity: 0.75;
  pointer-events: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--moon);
}

.brand__seal {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 20px;
  line-height: 1;
  color: var(--gold);
  border: 1px solid rgba(201, 162, 39, 0.55);
  border-radius: 2px;
  background:
    radial-gradient(circle at 28% 20%, rgba(201, 162, 39, 0.26), rgba(201, 162, 39, 0.03) 70%),
    rgba(23, 32, 74, 0.7);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--moon);
}

.brand__domain {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ash);
  margin-top: 3px;
}

.masthead__nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: center;
}

.navlist {
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0;
}

.navlist__item { display: block; }

.navlist__link {
  position: relative;
  display: inline-block;
  padding: 9px 12px 9px 15px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ash);
  text-decoration: none;
  border-radius: 2px;
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.navlist__link::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 50%;
  width: 3px;
  height: 14px;
  background: var(--gold);
  transform: translateY(-50%) scaleY(0);
  transform-origin: center;
  transition: transform var(--t-fast) var(--ease);
}

.navlist__link:hover {
  color: var(--moon);
  background: rgba(242, 238, 227, 0.05);
}

.navlist__link[aria-current="page"] { color: var(--gold); }

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

.masthead__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.cta-swap {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 1px;
  padding: 8px 18px;
  border: 1px solid var(--gold);
  border-radius: 2px;
  text-decoration: none;
  color: var(--gold);
  background: linear-gradient(180deg, rgba(201, 162, 39, 0.15), rgba(201, 162, 39, 0.04));
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.cta-swap__label {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.05em;
  line-height: 1.2;
}

.cta-swap__hint {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  line-height: 1.2;
  color: var(--gold-soft);
  opacity: 0.85;
}

.cta-swap:hover {
  background: var(--gold);
  border-color: var(--gold-soft);
  color: var(--ink);
}

.cta-swap:hover .cta-swap__hint { color: rgba(20, 22, 30, 0.8); }

.navtoggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 10px 13px;
  border: 1px solid var(--steel);
  border-radius: 2px;
  background: rgba(242, 238, 227, 0.05);
  color: var(--moon);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.navtoggle:hover {
  border-color: var(--gold);
  background: rgba(201, 162, 39, 0.12);
}

.navtoggle__box {
  display: grid;
  gap: 4px;
  width: 18px;
  flex: 0 0 auto;
}

.navtoggle__box span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}

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

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

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

.masthead__meter {
  height: 2px;
  background: rgba(42, 51, 80, 0.9);
  overflow: hidden;
}

.masthead__meter-fill {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--jade), var(--gold) 72%, var(--gold-soft));
  transition: width 120ms linear;
}

/* ---------- footer ---------- */
.footer {
  position: relative;
  margin-top: 96px;
  background: linear-gradient(180deg, rgba(16, 25, 64, 0.92), var(--indigo-900) 44%);
  border-top: 1px solid var(--steel);
  color: var(--moon);
}

.footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), rgba(201, 162, 39, 0) 46%, rgba(47, 143, 124, 0.72));
}

.footer__frame {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 44px 32px;
  padding-block: 60px 48px;
}

.footer__brand {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--steel);
}

.footer__seal {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1;
  color: var(--gold);
  border: 1px solid rgba(201, 162, 39, 0.5);
  border-radius: 2px;
  background: rgba(23, 32, 74, 0.8);
}

.footer__ids {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.footer__wordmark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.02em;
}

.footer__domain {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ash);
  margin-top: 4px;
}

.footer__tag {
  margin-left: auto;
  font-size: 13px;
  color: var(--ash);
  letter-spacing: 0.02em;
}

.footer__col { min-width: 0; }

.footer__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin-bottom: 16px;
  line-height: 1.4;
}

.footer__list {
  display: grid;
  gap: 10px;
}

.footer__list a {
  display: inline-block;
  font-size: 14px;
  color: var(--ash);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.footer__list a:hover {
  color: var(--gold-soft);
  transform: translateX(2px);
}

.footer__list--note li {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ash);
  padding-left: 12px;
  position: relative;
}

.footer__list--note li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 4px;
  height: 4px;
  background: var(--jade);
}

.footer__contact {
  display: grid;
  gap: 14px;
}

.footer__contact-item { min-width: 0; }

.footer__contact dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: rgba(154, 163, 184, 0.78);
  margin-bottom: 3px;
  line-height: 1.5;
}

.footer__contact dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--moon);
  overflow-wrap: anywhere;
}

.copy-chip {
  display: inline-flex;
  align-items: center;
  margin-left: 6px;
  padding: 1px 8px;
  border: 1px solid var(--steel);
  border-radius: 2px;
  background: rgba(242, 238, 227, 0.04);
  color: var(--ash);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.7;
  cursor: pointer;
  vertical-align: 1px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.copy-chip:hover {
  color: var(--gold-soft);
  border-color: rgba(201, 162, 39, 0.5);
  background: rgba(201, 162, 39, 0.12);
}

.copy-chip[data-copied] {
  color: var(--jade-soft);
  border-color: rgba(47, 143, 124, 0.7);
  background: rgba(47, 143, 124, 0.18);
}

.copy-chip[data-copied]::after {
  content: "已复制";
  margin-left: 4px;
}

.footer__legal {
  border-top: 1px solid var(--steel);
  border-bottom: 1px solid var(--steel);
  background: rgba(12, 20, 48, 0.62);
}

.footer__legal-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 32px;
  padding-block: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ash);
}

.footer__legal-inner p {
  margin: 0;
  position: relative;
  padding-left: 14px;
}

.footer__legal-inner p::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 5px;
  height: 5px;
  transform: translateY(-50%);
  background: var(--cinnabar);
}

.footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-block: 22px 30px;
  font-size: 13px;
  color: var(--ash);
}

.footer__copy { margin: 0; }

.footer__legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.footer__legal-links a {
  font-size: 13px;
  color: var(--ash);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.footer__legal-links a:hover {
  color: var(--gold-soft);
  border-bottom-color: var(--gold);
}

/* ---------- buttons ---------- */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--moon);
  --btn-bd: var(--steel);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 24px;
  border: 1px solid var(--btn-bd);
  border-radius: 2px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.03em;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--sm {
  padding: 8px 16px;
  font-size: 13.5px;
}

.btn--gold {
  --btn-bg: var(--gold);
  --btn-fg: var(--ink);
  --btn-bd: var(--gold);
}

.btn--gold:hover {
  --btn-bg: var(--gold-soft);
  --btn-bd: var(--gold-soft);
}

.btn--ghost {
  --btn-bg: rgba(242, 238, 227, 0.04);
  --btn-fg: var(--moon);
  --btn-bd: var(--steel);
}

.btn--ghost:hover {
  --btn-bd: rgba(201, 162, 39, 0.7);
  --btn-fg: var(--gold-soft);
  --btn-bg: rgba(201, 162, 39, 0.1);
}

.btn--jade {
  --btn-bg: rgba(47, 143, 124, 0.16);
  --btn-fg: var(--jade-soft);
  --btn-bd: rgba(47, 143, 124, 0.65);
}

.btn--jade:hover {
  --btn-bg: var(--jade);
  --btn-fg: var(--moon);
  --btn-bd: var(--jade);
}

/* ---------- chips ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: rgba(242, 238, 227, 0.03);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1.7;
  text-decoration: none;
  white-space: nowrap;
}

.chip--gold {
  color: var(--gold-soft);
  border-color: rgba(201, 162, 39, 0.45);
  background: rgba(201, 162, 39, 0.12);
}

.chip--jade {
  color: var(--jade-soft);
  border-color: rgba(47, 143, 124, 0.55);
  background: rgba(47, 143, 124, 0.16);
}

.chip--cinnabar {
  color: var(--moon);
  border-color: rgba(194, 64, 47, 0.6);
  background: var(--cinnabar);
}

/* ---------- cards ---------- */
.card {
  position: relative;
  padding: 24px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: var(--surface-2);
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.card:hover { border-color: rgba(201, 162, 39, 0.55); }

.card--glass {
  background: rgba(23, 32, 74, 0.55);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-color: rgba(201, 162, 39, 0.3);
}

/* ---------- bento ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

.bento > * { min-width: 0; grid-column: span 12; }

@media (min-width: 760px) {
  .bento > [data-span="3"] { grid-column: span 6; }
  .bento > [data-span="4"] { grid-column: span 6; }
  .bento > [data-span="6"] { grid-column: span 6; }
  .bento > [data-span="8"] { grid-column: span 12; }
}

@media (min-width: 1100px) {
  .bento > [data-span="3"] { grid-column: span 3; }
  .bento > [data-span="4"] { grid-column: span 4; }
  .bento > [data-span="6"] { grid-column: span 6; }
  .bento > [data-span="8"] { grid-column: span 8; }
}

/* ---------- media frame ---------- */
.media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background:
    linear-gradient(135deg, rgba(23, 32, 74, 0.95), rgba(12, 20, 48, 0.95));
}

.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(to top, rgba(12, 20, 48, 0.55), transparent 58%),
    repeating-linear-gradient(to right, rgba(154, 163, 184, 0.12) 0 1px, transparent 1px 72px);
  opacity: 0.55;
}

.media--wide { aspect-ratio: 16 / 9; }
.media--std  { aspect-ratio: 4 / 3; }
.media--sq   { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }

.media__cap {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--gold-soft);
}

/* ---------- tabs ---------- */
.tabs { display: block; }

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 24px;
}

.tabs__tab {
  appearance: none;
  margin-bottom: -1px;
  padding: 11px 18px;
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: 2px 2px 0 0;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1.4;
  cursor: pointer;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.tabs__tab:hover {
  color: var(--text);
  background: rgba(242, 238, 227, 0.05);
}

.tabs__tab[aria-selected="true"] {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.tabs__panel { animation: panelIn var(--t-mid) var(--ease); }
.tabs__panel[hidden] { display: none; }

@keyframes panelIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- section head ---------- */
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 10px 24px;
  margin-bottom: 32px;
}

.section-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.2vw, 40px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--text);
}

.section-head__note {
  margin: 0;
  max-width: 44ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-muted);
}

.section-head .eyebrow { width: 100%; }

/* ---------- crumbs ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-block: 24px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  list-style: none;
}

.crumbs li { display: inline-flex; align-items: center; }

.crumbs li:not(:last-child)::after {
  content: "/";
  margin-left: 10px;
  color: var(--steel);
}

.crumbs a {
  color: var(--ash);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}

.crumbs a:hover { color: var(--gold-soft); }

.crumbs [aria-current="page"] { color: var(--gold); }

/* ---------- bands ---------- */
.band { padding-block: 96px; }
.band--tight { padding-block: 64px; }

.band--indigo {
  background: var(--indigo-800);
  border-block: 1px solid var(--steel);
}

.band--moon {
  background: var(--moon);
  color: var(--ink);
  --text: var(--ink);
  --text-muted: #5B6274;
  --rule: #D5CEBE;
  --surface-2: #FFFFFF;
  --accent: var(--gold-deep);
}

.band--moon .eyebrow,
.band--moon .tabs__tab[aria-selected="true"] {
  color: var(--gold-deep);
}

.band--moon .tabs__tab[aria-selected="true"] {
  border-bottom-color: var(--gold-deep);
}

.band--moon .eyebrow::before { background: var(--gold-deep); }

/* ---------- prose ---------- */
.prose {
  max-width: 34em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}

.prose h3,
.prose h4 { margin-top: 32px; margin-bottom: 12px; color: var(--text); }

.prose p { margin-top: 16px; color: var(--text); }

.prose ul,
.prose ol {
  margin-top: 16px;
  display: grid;
  gap: 8px;
}

.prose ul li,
.prose ol li {
  padding-left: 18px;
  position: relative;
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

.prose li::marker { color: var(--accent); }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .footer__frame { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 980px) {
  .masthead__frame {
    min-height: 64px;
    gap: 14px;
    padding-left: 20px;
  }

  .masthead__frame::before {
    top: 10px;
    bottom: 10px;
  }

  .masthead__frame::after { display: none; }

  .masthead__nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    padding: 12px 20px 20px;
    background: rgba(16, 25, 64, 0.98);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--steel);
    box-shadow: 0 26px 44px -28px rgba(0, 0, 0, 1);
    max-height: 72vh;
    overflow-y: auto;
  }

  .masthead__nav[data-open] {
    display: block;
    animation: navDrop var(--t-mid) var(--ease);
  }

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

  .navlist__link {
    display: block;
    padding: 13px 14px;
    font-size: 16px;
    border-bottom: 1px solid rgba(42, 51, 80, 0.72);
  }

  .navlist__item:last-child .navlist__link { border-bottom: 0; }

  .navtoggle { display: inline-flex; }

  .cta-swap__hint { display: none; }

  .band { padding-block: 64px; }
  .band--tight { padding-block: 44px; }

  .footer { margin-top: 64px; }
}

@media (max-width: 720px) {
  :root { --gutter: 18px; --gap: 16px; }

  .brand__domain { display: none; }
  .brand__name { font-size: 16px; }
  .brand__seal { width: 36px; height: 36px; font-size: 17px; }

  .cta-swap { padding: 7px 12px; }
  .cta-swap__label { font-size: 13px; }
  .navtoggle__text { display: none; }

  .footer__frame {
    grid-template-columns: 1fr;
    gap: 34px;
    padding-block: 44px 32px;
  }

  .footer__tag {
    margin-left: 0;
    flex-basis: 100%;
  }

  .footer__base { flex-direction: column; align-items: flex-start; }

  .footer__legal-inner { gap: 8px 18px; font-size: 11.5px; }

  .section-head { margin-bottom: 24px; }
}

@keyframes navDrop {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- reduced motion ---------- */
@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .btn:hover,
  .footer__list a:hover {
    transform: none;
  }

  .masthead__meter-fill { transition: none; }
}