/* =========================================================
   dafa888手机版 — 共享站点样式 /assets/site.css
   1 重置 · 2 变量 · 3 中文排版 · 4 页头 · 5 页脚
   6 通用组件 · 7 响应式与无障碍
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background: #FBF7F0;
}

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

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

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

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

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

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

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

/* ---------- 2 变量 ---------- */
:root {
  --yin: #C8102E;
  --yin-deep: #8E0B20;
  --gold: #E8B23A;
  --gold-soft: #F6DFA4;
  --peacock: #0E7C86;
  --peacock-deep: #0A5F67;
  --peacock-soft: #D6EDEF;
  --cream: #FBF7F0;
  --rock: #3C342F;
  --ink: #1A1512;
  --tea: #7A6A5C;
  --terrace: #4E7C59;

  --line: rgba(26, 21, 18, .12);
  --line-strong: rgba(26, 21, 18, .24);
  --line-dark: rgba(251, 247, 240, .16);

  --r-xl: 36px;
  --r-l: 22px;
  --r-m: 16px;
  --r-s: 12px;
  --pill: 999px;

  --font-cn: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Courier New", monospace;

  --shadow-card: 0 1px 0 rgba(26, 21, 18, .04), 0 22px 42px -30px rgba(26, 21, 18, .52);
  --sp-section: clamp(56px, 7.6vw, 112px);
}

/* ---------- 3 中文排版 ---------- */
body {
  font-family: var(--font-cn);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.78;
  letter-spacing: .012em;
  color: var(--rock);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  color: var(--ink);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: .05em;
}

h1 { font-size: clamp(30px, 5.2vw, 58px); }
h2 { font-size: clamp(24px, 3.6vw, 40px); }
h3 { font-size: clamp(18px, 2.2vw, 24px); letter-spacing: .04em; }
h4 { font-size: 16px; letter-spacing: .06em; }

p { max-width: 68ch; }

strong { font-weight: 800; color: var(--ink); }

a { transition: color .18s ease, background-color .18s ease, border-color .18s ease; }

::selection { background: var(--gold); color: var(--ink); }

.num,
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--yin);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 3px;
  border-radius: var(--pill);
  background: var(--gold);
}

.lede {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.85;
  color: var(--rock);
  max-width: 62ch;
}

.meta-line {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--tea);
}

.prose > p + p { margin-top: 1em; }
.prose h2 { margin-top: 1.6em; margin-bottom: .5em; }
.prose h3 { margin-top: 1.4em; margin-bottom: .4em; }
.prose ul { margin: 1em 0; display: grid; gap: .5em; }
.prose li { position: relative; padding-left: 20px; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold-soft);
  box-shadow: 0 0 0 2px var(--gold);
}

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

.sr-only {
  position: absolute;
  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;
}

:focus-visible {
  outline: 3px solid var(--peacock);
  outline-offset: 3px;
  border-radius: 8px;
}

/* ---------- 4 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: var(--cream);
}

.skip-link {
  position: absolute;
  left: 14px;
  top: -80px;
  z-index: 200;
  padding: 12px 20px;
  border-radius: 0 0 var(--r-s) var(--r-s);
  background: var(--ink);
  color: var(--cream);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .08em;
  transition: top .18s ease;
}

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

.masthead {
  background: var(--cream);
  border-bottom: 1px solid var(--line);
}

.masthead__inner {
  width: min(1360px, calc(100% - 48px));
  margin-inline: auto;
  padding: 16px 0 13px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
}

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

.masthead__aside--start { justify-self: start; }
.masthead__aside--end { justify-self: end; }

.masthead__utility {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 14px;
  border-radius: var(--pill);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--tea);
}

.masthead__utility:hover {
  color: var(--yin);
  background: rgba(200, 16, 46, .08);
}

.masthead__utility--cta {
  padding: 0 20px;
  background: var(--yin);
  color: #fff;
  font-weight: 700;
  letter-spacing: .08em;
}

.masthead__utility--cta:hover {
  background: var(--yin-deep);
  color: #fff;
}

.brand {
  display: grid;
  justify-items: center;
  gap: 5px;
  text-align: center;
  padding: 4px 12px;
  border-radius: var(--r-m);
}

.brand__cn {
  font-size: clamp(24px, 3.2vw, 40px);
  font-weight: 900;
  letter-spacing: .16em;
  padding-left: .16em;
  line-height: 1.05;
  color: var(--yin);
  white-space: nowrap;
}

.brand__rule {
  width: 64px;
  height: 3px;
  border-radius: var(--pill);
  background: linear-gradient(90deg, var(--gold), var(--yin));
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .3em;
  padding-left: .3em;
  color: var(--tea);
  white-space: nowrap;
}

.nav-bar {
  position: relative;
  background: var(--ink);
}

.nav-bar::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--yin), var(--gold) 58%, var(--terrace));
}

.nav-bar__inner {
  width: min(1360px, calc(100% - 48px));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-bar__label {
  display: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: rgba(251, 247, 240, .52);
}

.nav-toggle {
  display: none;
  width: 50px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid rgba(251, 247, 240, .3);
  background: rgba(251, 247, 240, .06);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--gold-soft);
  transition: transform .2s ease, opacity .2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.site-nav { width: 100%; }

.site-nav__list {
  display: flex;
  justify-content: center;
  gap: 2px;
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 17px 20px;
  min-height: 52px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .08em;
  color: rgba(251, 247, 240, .76);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: 10px;
  height: 3px;
  border-radius: var(--pill);
  background: var(--gold);
  transform: scaleX(0);
  transition: transform .2s ease, background-color .2s ease;
}

.site-nav__link:hover { color: var(--cream); }
.site-nav__link:hover::after {
  background: rgba(246, 223, 164, .5);
  transform: scaleX(1);
}

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

.scroll-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--yin), var(--gold));
  z-index: 3;
}

/* ---------- 5 页脚 ---------- */
.site-footer {
  background: var(--cream);
  padding: 0 18px 34px;
}

.footer__shell {
  position: relative;
  overflow: hidden;
  max-width: 1360px;
  margin-inline: auto;
  padding: clamp(32px, 4.4vw, 60px) clamp(22px, 4vw, 64px) clamp(26px, 3vw, 42px);
  background: var(--ink);
  color: rgba(251, 247, 240, .78);
  border-radius: var(--r-xl);
}

.footer__shell::before {
  content: "";
  position: absolute;
  inset: -50% 38% auto -18%;
  height: 90%;
  background: radial-gradient(closest-side, rgba(232, 178, 58, .24), transparent);
  pointer-events: none;
}

.footer__top {
  position: relative;
  display: grid;
  gap: 22px;
  align-items: center;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line-dark);
}

.footer__brand {
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 900;
  letter-spacing: .12em;
  padding-left: .12em;
  color: var(--gold-soft);
  line-height: 1.2;
}

.footer__brand-sub {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .3em;
  color: rgba(251, 247, 240, .48);
}

.footer__note {
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(251, 247, 240, .7);
}

.footer__grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px 20px;
  padding: 32px 0 8px;
}

.footer__col-title {
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .18em;
  color: var(--gold);
}

.footer__links { display: grid; gap: 2px; }

.footer__links a {
  display: inline-block;
  padding: 7px 0;
  min-height: 36px;
  font-size: 14px;
  color: rgba(251, 247, 240, .74);
  transition: color .18s ease, transform .18s ease;
}

.footer__links a:hover {
  color: var(--gold-soft);
  transform: translateX(3px);
}

.footer__meta {
  position: relative;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line-dark);
  display: grid;
  gap: 14px;
  font-size: 13.5px;
  color: rgba(251, 247, 240, .62);
}

.footer__contact-line { max-width: 72ch; }

.footer__val {
  font-family: var(--font-mono);
  letter-spacing: .02em;
  color: var(--peacock-soft);
}

.footer__address { color: rgba(251, 247, 240, .58); }

.footer__legal {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(251, 247, 240, .46);
}

/* ---------- 6 通用组件 ---------- */
#main-content { display: block; scroll-margin-top: 170px; }

.wrap {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.wrap--wide { width: min(1360px, calc(100% - 40px)); }
.wrap--narrow { width: min(820px, calc(100% - 40px)); }

.section { padding: var(--sp-section) 0; }
.section--tight { padding-top: clamp(30px, 4vw, 52px); }

.section--sunken {
  background: var(--gold-soft);
  color: var(--rock);
}

.section--ink {
  background: var(--ink);
  color: rgba(251, 247, 240, .82);
}

.section--ink h1,
.section--ink h2,
.section--ink h3 { color: var(--cream); }

.section--ink .sec-head__title { color: var(--cream); }
.section--ink .sec-head__desc { color: rgba(251, 247, 240, .68); }
.section--ink .divider { background: var(--line-dark); }

.sec-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(16px, 3vw, 36px);
  align-items: start;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.sec-head__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: clamp(46px, 9vw, 124px);
  line-height: .8;
  letter-spacing: -.03em;
  color: var(--gold);
}

.sec-head__title {
  font-size: clamp(24px, 3.4vw, 42px);
  font-weight: 900;
  letter-spacing: .06em;
  color: var(--ink);
}

.sec-head__desc {
  margin-top: 10px;
  max-width: 54ch;
  color: var(--tea);
  font-size: 15.5px;
}

.grid { display: grid; gap: clamp(16px, 2.2vw, 26px); }

.card {
  position: relative;
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: var(--r-l);
  background: #fff;
  border: 1px solid rgba(26, 21, 18, .07);
  box-shadow: var(--shadow-card);
}

.card--gold { background: var(--gold-soft); border-color: rgba(232, 178, 58, .45); }
.card--blue { background: var(--peacock-soft); border-color: rgba(14, 124, 134, .28); }
.card--flat { box-shadow: none; background: transparent; border: 1px solid var(--line-strong); }

.card--ink {
  background: var(--ink);
  border-color: rgba(251, 247, 240, .14);
  color: rgba(251, 247, 240, .8);
}

.card__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--yin);
}

.card__title {
  margin-top: 8px;
  font-size: clamp(18px, 2vw, 23px);
  font-weight: 800;
  letter-spacing: .04em;
  color: var(--ink);
}

.card__body {
  margin-top: 10px;
  font-size: 15px;
  color: var(--rock);
}

.card__foot {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.card--ink .card__title { color: var(--cream); }
.card--ink .card__body { color: rgba(251, 247, 240, .78); }
.card--ink .card__num { color: var(--gold); }
.card--ink .card__foot { border-top-color: var(--line-dark); }

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 13px;
  border-radius: var(--pill);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  background: var(--peacock-soft);
  color: var(--peacock-deep);
  border: 1px solid rgba(14, 124, 134, .3);
}

.tag--red {
  background: rgba(200, 16, 46, .1);
  color: var(--yin-deep);
  border-color: rgba(200, 16, 46, .28);
}

.tag--gold {
  background: var(--gold-soft);
  color: #6F4F08;
  border-color: rgba(232, 178, 58, .55);
}

.tag--mute {
  background: rgba(122, 106, 92, .12);
  color: var(--tea);
  border-color: rgba(122, 106, 92, .26);
}

.param {
  border-radius: var(--r-l);
  background: #fff;
  border: 1px solid rgba(14, 124, 134, .24);
  overflow: hidden;
}

.param__row {
  display: grid;
  grid-template-columns: minmax(96px, .7fr) minmax(0, 1.3fr) auto;
  gap: 14px;
  align-items: center;
  padding: 15px 20px;
  border-top: 1px solid rgba(26, 21, 18, .08);
}

.param__row:first-child { border-top: 0; }

.param__key {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--tea);
}

.param__val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--peacock);
  word-break: break-word;
}

.copy-btn {
  min-height: 36px;
  padding: 0 14px;
  border-radius: var(--pill);
  border: 1px solid rgba(14, 124, 134, .34);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--peacock-deep);
  transition: background-color .18s ease, color .18s ease;
}

.copy-btn:hover { background: var(--peacock); color: #fff; }
.copy-btn[data-copied] { background: var(--terrace); border-color: var(--terrace); color: #fff; }

.timeline { position: relative; }

.timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 3px;
  border-radius: var(--pill);
  background: linear-gradient(180deg, var(--yin), var(--gold), var(--terrace));
}

.timeline__item {
  position: relative;
  padding: 0 0 24px 40px;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--gold-soft);
  border: 3px solid var(--yin);
}

.timeline__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--peacock);
}

.timeline__title {
  margin-top: 4px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .04em;
  color: var(--ink);
}

.timeline__text {
  margin-top: 6px;
  font-size: 14.5px;
  color: var(--tea);
  max-width: 56ch;
}

.tabs { display: block; }

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  width: fit-content;
  max-width: 100%;
  padding: 6px;
  border-radius: var(--pill);
  background: rgba(26, 21, 18, .06);
}

.tabs__tab {
  min-height: 44px;
  padding: 0 20px;
  border-radius: var(--pill);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--tea);
  transition: background-color .2s ease, color .2s ease;
}

.tabs__tab:hover { color: var(--ink); }

.tabs__tab[aria-selected="true"] {
  background: var(--yin);
  color: #fff;
}

.tabs__panel { padding-top: 26px; }
.tabs__panel[hidden] { display: none; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 24px;
  border-radius: var(--pill);
  border: 2px solid transparent;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease, transform .18s ease;
}

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

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

.btn--gold { background: var(--gold); color: var(--ink); }
.btn--gold:hover { background: var(--gold-soft); }

.btn--ghost { border-color: var(--line-strong); color: var(--ink); }
.btn--ghost:hover { border-color: var(--yin); color: var(--yin); }

.btn--onDark { border-color: rgba(251, 247, 240, .36); color: var(--cream); }
.btn--onDark:hover { background: rgba(251, 247, 240, .1); }

.btn--sm {
  min-height: 38px;
  padding: 0 18px;
  font-size: 13px;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--tea);
}

.breadcrumbs__item { display: inline-flex; align-items: center; gap: 10px; }

.breadcrumbs__item + .breadcrumbs__item::before {
  content: "／";
  color: rgba(122, 106, 92, .5);
}

.breadcrumbs__item a:hover { color: var(--yin); }

.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-l);
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--gold-soft), var(--peacock-soft));
}

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

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

.media-frame__ph {
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: rgba(26, 21, 18, .42);
  background:
    radial-gradient(120% 70% at 12% 8%, rgba(232, 178, 58, .55), transparent 60%),
    radial-gradient(110% 80% at 88% 92%, rgba(14, 124, 134, .35), transparent 62%),
    repeating-linear-gradient(115deg, rgba(26, 21, 18, .07) 0 2px, transparent 2px 14px);
}

.media-frame__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--tea);
}

/* 显现动效 */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .52s ease, transform .52s ease;
}

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

/* ---------- 7 响应式与无障碍 ---------- */
@media (min-width: 900px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--asym { grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); }
}

@media (min-width: 760px) {
  .footer__grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 880px) {
  .footer__top { grid-template-columns: auto minmax(0, 1fr) auto; }
  .footer__meta { grid-template-columns: minmax(0, 1fr) auto; align-items: end; }
}

@media (max-width: 900px) {
  .masthead__inner {
    width: calc(100% - 28px);
    padding: 13px 0 12px;
    gap: 8px;
  }

  .masthead__utility {
    min-height: 38px;
    padding: 0 11px;
    font-size: 12px;
    letter-spacing: .06em;
  }

  .masthead__utility--cta { padding: 0 14px; }

  .brand__cn { font-size: clamp(21px, 4.8vw, 30px); letter-spacing: .12em; padding-left: .12em; }
  .brand__rule { width: 48px; height: 2px; }
  .brand__sub { font-size: 9px; letter-spacing: .22em; padding-left: .22em; }

  .nav-bar__inner {
    width: calc(100% - 28px);
    padding: 9px 0;
    flex-wrap: wrap;
    justify-content: space-between;
    row-gap: 0;
  }

  .nav-bar__label { display: block; }
  .nav-toggle { display: inline-flex; width: 46px; height: 42px; }

  .site-nav {
    flex: 0 0 100%;
    width: 100%;
    display: none;
  }

  .site-nav[data-open] { display: block; }

  .site-nav__list {
    flex-direction: column;
    justify-content: flex-start;
    gap: 0;
    padding: 6px 0 12px;
    border-top: 1px solid var(--line-dark);
    margin-top: 6px;
  }

  .site-nav__link {
    display: flex;
    align-items: center;
    padding: 13px 4px;
    min-height: 48px;
    font-size: 16px;
    color: rgba(251, 247, 240, .8);
    border-bottom: 1px solid rgba(251, 247, 240, .08);
  }

  .site-nav__link::after { display: none; }

  .site-nav__link[aria-current="page"] {
    color: var(--gold);
    box-shadow: inset 3px 0 0 var(--gold);
    padding-left: 13px;
    border-radius: 0 8px 8px 0;
  }

  .scroll-progress { height: 3px; }

  #main-content { scroll-margin-top: 140px; }
}

@media (max-width: 760px) {
  .masthead__aside { display: none; }
  .sec-head { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .sec-head__num { font-size: clamp(44px, 16vw, 76px); }
  .param__row { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .copy-btn { justify-self: start; }
  .footer__shell { border-radius: 26px; }
  .tabs__list { width: 100%; border-radius: var(--r-l); }
  .tabs__tab { flex: 1 1 auto; padding: 0 14px; }
}

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

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

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

  .scroll-progress { transition: none; }
}