/* =========================================================
   CMD体育 · /assets/site.css
   高原岩层系统：刊头报头 / 胶囊分段导航 / 纸叠容器 / 地层页脚
   ========================================================= */

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

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

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

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

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

button { font: inherit; color: inherit; }

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

/* ---------- tokens ---------- */
:root {
  --qing: #0E4F5C;
  --qing-deep: #0A3C47;
  --rock: #072F36;
  --snow: #F7FBF9;
  --ice: #DDE9E6;
  --orange: #FF6A2B;
  --orange-deep: #C2410C;
  --orange-soft: #FFC2A3;
  --lime: #B6F36B;
  --navy: #123A5A;
  --ink: #111C1E;
  --silver: #9FB5B2;

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

  --wrap: 1240px;
  --gutter: clamp(1.1rem, 4vw, 3rem);
  --cut: 5deg;
  --line: rgba(14, 79, 92, 0.16);
  --line-strong: rgba(14, 79, 92, 0.28);
  --shadow-paper: 0 28px 48px -42px rgba(7, 47, 54, 0.85);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- base typography ---------- */
body {
  font-family: var(--font-body);
  font-size: clamp(16px, 0.55vw + 14.6px, 17.5px);
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--ink);
  background-color: var(--snow);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--ink);
  text-wrap: balance;
}

h1 { font-size: clamp(2.4rem, 6.2vw, 4.5rem); letter-spacing: 0.05em; }
h2 { font-size: clamp(1.65rem, 3.2vw, 2.55rem); }
h3 { font-size: clamp(1.15rem, 1.9vw, 1.5rem); letter-spacing: 0.03em; }
h4 { font-size: 1rem; letter-spacing: 0.08em; }

p { margin-bottom: 1em; }
p:last-child { margin-bottom: 0; }

strong { font-weight: 700; }

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

#main-content { scroll-margin-top: clamp(96px, 16vh, 160px); }

/* ---------- focus ---------- */
:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
  border-radius: 4px;
}

.site-footer :focus-visible { outline-color: var(--lime); }

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

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.06em;
}

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

.lead {
  font-size: clamp(1.04rem, 1.5vw, 1.26rem);
  line-height: 1.78;
  color: #283a39;
  max-width: 60ch;
}

.label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--qing);
}

.label::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--orange);
  flex: none;
}

.label--on-dark { color: var(--lime); }
.label--on-dark::before { background: var(--orange-soft); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: rgba(247, 251, 249, 0.72);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--qing);
  white-space: nowrap;
}

.tag--orange {
  background: var(--orange-soft);
  border-color: rgba(194, 65, 12, 0.35);
  color: #7A2B08;
}

.tag--lime {
  background: rgba(182, 243, 107, 0.26);
  border-color: rgba(182, 243, 107, 0.62);
  color: #2F4C12;
}

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 0.65rem;
  left: 0.65rem;
  z-index: 300;
  padding: 0.7rem 1.15rem;
  border-radius: 6px;
  background: var(--ink);
  color: var(--snow);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  transform: translateY(-180%);
  transition: transform 0.22s var(--ease);
}

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

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, #F3FAF7 0%, #F7FBF9 100%);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 18px 34px -34px rgba(7, 47, 54, 0.9);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--qing) 0%, var(--qing) 42%, var(--lime) 70%, var(--orange) 100%);
  pointer-events: none;
}

.masthead {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
  min-height: 78px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 1rem;
  border-bottom: 1px solid var(--line);
}

.masthead__meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--qing);
  white-space: nowrap;
}

.masthead__meta--end {
  justify-content: flex-end;
  color: var(--rock);
}

.masthead__vol {
  padding: 0.22rem 0.45rem;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  background: var(--snow);
  color: var(--qing);
  font-size: 10px;
}

.masthead__edition { letter-spacing: 0.18em; }

.masthead__service {
  padding-left: 0.7rem;
  border-left: 1px solid var(--line-strong);
  color: var(--qing);
  letter-spacing: 0.1em;
}

.brand {
  display: grid;
  justify-items: center;
  gap: 0.3rem;
  padding: 0.55rem 0.4rem;
  color: var(--ink);
  text-align: center;
}

.brand__name {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.1vw, 2.1rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.22em;
  text-indent: 0.22em;
  color: var(--ink);
  transition: color 0.2s var(--ease);
}

.brand__descriptor {
  font-size: 10px;
  letter-spacing: 0.42em;
  text-indent: 0.42em;
  color: var(--qing);
  text-transform: uppercase;
}

.brand::after {
  content: "";
  width: 34px;
  height: 3px;
  background: var(--orange);
  transform: skewX(-28deg);
}

.brand:hover .brand__name { color: var(--qing); }

.status-dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 0 rgba(182, 243, 107, 0.7);
  animation: dot-pulse 2.4s ease-in-out infinite;
}

/* ---------- nav ---------- */
.nav-bar {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 0.55rem var(--gutter) 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.site-nav { display: block; }

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.2rem;
  padding: 0.3rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(221, 233, 230, 0.75), rgba(247, 251, 249, 0.94));
}

.site-nav__link {
  display: inline-block;
  padding: 0.5rem 1.05rem;
  border-radius: 999px;
  font-size: 0.94rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--qing);
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.site-nav__link:hover {
  background: var(--snow);
  color: var(--rock);
}

.site-nav__link[aria-current="page"] {
  background: var(--orange);
  color: var(--ink);
  box-shadow: inset 0 -2px 0 rgba(194, 65, 12, 0.35);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 1rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--snow);
  color: var(--qing);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.nav-toggle__bars {
  display: inline-grid;
  gap: 4px;
  width: 18px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.nav-toggle[aria-expanded="true"] {
  background: var(--orange);
  border-color: transparent;
  color: var(--ink);
}

.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); }

/* ---------- scroll progress ---------- */
.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 3px;
  background: rgba(14, 79, 92, 0.08);
  overflow: hidden;
  pointer-events: none;
}

.scroll-progress__fill {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--qing) 0%, var(--lime) 52%, var(--orange) 100%);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.5rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: transform 0.18s var(--ease), background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

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

.btn--solid {
  background: var(--orange);
  color: var(--ink);
  box-shadow: 0 14px 28px -22px rgba(255, 106, 43, 0.95);
}

.btn--solid:hover { background: var(--orange-soft); }

.btn--ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--qing);
}

.btn--ghost:hover {
  background: var(--ice);
  border-color: var(--qing);
}

.btn--lime {
  background: var(--lime);
  color: var(--rock);
}

.btn--lime:hover { background: #CDFA8E; }

/* ---------- breadcrumb ---------- */
.breadcrumb { font-size: 0.8rem; letter-spacing: 0.08em; }

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
}

.breadcrumb__item {
  display: inline-flex;
  align-items: center;
  color: var(--qing);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "／";
  margin-right: 0.4rem;
  color: var(--silver);
}

.breadcrumb__link {
  color: var(--qing);
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.breadcrumb__link:hover {
  color: var(--orange-deep);
  border-color: var(--orange);
}

.breadcrumb__item[aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- sections ---------- */
.section {
  position: relative;
  padding-block: clamp(2.6rem, 6vw, 5.2rem);
}

.section--snow { background: var(--snow); }

.section--ice {
  background: linear-gradient(180deg, var(--snow) 0%, var(--ice) 100%);
}

.section--qing {
  background: linear-gradient(158deg, #105C6B 0%, var(--qing) 42%, var(--rock) 100%);
  color: #DCEBE8;
}

.section--rock {
  background: radial-gradient(120% 130% at 8% 0%, #0D4550 0%, var(--rock) 56%, #04222A 100%);
  color: #DCEBE8;
}

.section--qing h1,
.section--qing h2,
.section--qing h3,
.section--qing h4,
.section--rock h1,
.section--rock h2,
.section--rock h3,
.section--rock h4 {
  color: var(--snow);
}

.section--qing .lead,
.section--rock .lead { color: rgba(226, 240, 237, 0.85); }

.section--qing .label,
.section--rock .label { color: var(--lime); }

.section--qing .btn--ghost,
.section--rock .btn--ghost {
  border-color: rgba(247, 251, 249, 0.42);
  color: var(--snow);
}

.section--qing .btn--ghost:hover,
.section--rock .btn--ghost:hover {
  background: rgba(247, 251, 249, 0.14);
  border-color: var(--lime);
}

/* ---------- grid ---------- */
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(1rem, 2.4vw, 1.8rem);
}

.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-12 { grid-column: span 12; }

.split {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(1.6rem, 4vw, 3.4rem);
  align-items: start;
}

.split--reverse { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }

/* ---------- paper ---------- */
.paper {
  position: relative;
  padding: clamp(1.25rem, 2.4vw, 1.9rem);
  background: var(--snow);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-paper);
}

.paper--stack { isolation: isolate; }

.paper--stack::before {
  content: "";
  position: absolute;
  inset: 10px -10px -10px 10px;
  z-index: -1;
  background: var(--ice);
  border: 1px solid rgba(14, 79, 92, 0.14);
  transform: rotate(-0.8deg);
}

.paper__label {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.9rem;
  padding: 0.34rem 0.72rem;
  background: var(--qing);
  color: var(--snow);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.paper__label::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--lime);
  flex: none;
}

/* ---------- media frames ---------- */
.media-frame {
  position: relative;
  margin: 0;
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(150deg, var(--ice) 0%, #C7DCD7 100%);
  border: 1px solid var(--line-strong);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 10;
}

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

.media-frame__grid {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(14, 79, 92, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 79, 92, 0.14) 1px, transparent 1px);
  background-size: 38px 38px;
  mix-blend-mode: multiply;
}

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 2;
  max-width: 90%;
  padding: 0.42rem 0.8rem;
  background: var(--rock);
  color: var(--lime);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
}

/* ---------- prose ---------- */
.prose {
  max-width: 72ch;
  font-size: 1.02rem;
  line-height: 1.85;
  color: #23312F;
}

.prose p { margin: 0 0 1.1em; }

.prose h2 {
  margin: 2.1em 0 0.65em;
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
}

.prose h3 { margin: 1.7em 0 0.55em; }

.prose ul,
.prose ol {
  display: grid;
  gap: 0.6rem;
  margin: 0 0 1.2em;
}

.prose ul li {
  position: relative;
  padding-left: 1.4rem;
}

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 8px;
  height: 2px;
  background: var(--orange);
}

.prose ol { counter-reset: prose-ol; }
.prose ol li {
  position: relative;
  padding-left: 1.8rem;
  counter-increment: prose-ol;
}

.prose ol li::before {
  content: counter(prose-ol) "/";
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 0.82em;
  color: var(--orange-deep);
}

.prose a {
  color: var(--orange-deep);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.prose strong { color: var(--ink); }

.prose--on-dark { color: rgba(226, 240, 237, 0.86); }
.prose--on-dark h2,
.prose--on-dark h3,
.prose--on-dark strong { color: var(--snow); }
.prose--on-dark a { color: var(--orange-soft); }
.prose--on-dark ul li::before { background: var(--lime); }

/* ---------- tabs ---------- */
.tabs { position: relative; }

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  padding: 0.32rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(221, 233, 230, 0.62);
}

.tabs__btn {
  appearance: none;
  border: 0;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  background: transparent;
  color: var(--qing);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.tabs__btn:hover { background: var(--snow); }

.tabs__btn[aria-selected="true"] {
  background: var(--qing);
  color: var(--snow);
}

.tabs__btn[aria-selected="true"]::after {
  content: " ●";
  color: var(--lime);
  font-size: 0.7em;
}

.tabs__panel {
  margin-top: 1.4rem;
  animation: panel-in 0.24s var(--ease) both;
}

.tabs__panel[hidden] { display: none; }

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

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

/* ---------- footer ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background: radial-gradient(120% 140% at 12% 0%, #0D4550 0%, var(--rock) 56%, #04222A 100%);
  color: #D3E2E0;
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(118deg, rgba(182, 243, 107, 0.055) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(-118deg, rgba(14, 79, 92, 0.42) 0 1px, transparent 1px 72px);
}

.footer__edge {
  position: relative;
  height: 9px;
  background: linear-gradient(
    90deg,
    var(--orange) 0 11%,
    var(--orange-soft) 11% 19%,
    var(--qing) 19% 58%,
    var(--navy) 58% 82%,
    var(--lime) 82% 100%
  );
}

.footer__inner {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(2.3rem, 5vw, 3.8rem) var(--gutter) clamp(1.6rem, 3vw, 2.4rem);
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.55fr);
  gap: clamp(2rem, 5vw, 4rem);
}

.footer__logo {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  font-weight: 900;
  letter-spacing: 0.2em;
  line-height: 1;
  color: var(--snow);
}

.footer__tag {
  margin: 0.45rem 0 0;
  font-size: 0.78rem;
  letter-spacing: 0.3em;
  color: var(--lime);
}

.footer__stamp {
  margin: 1rem 0 0;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: rgba(211, 226, 224, 0.62);
}

.footer__blurb {
  margin: 1rem 0 0;
  max-width: 30ch;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(211, 226, 224, 0.82);
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.2rem, 3vw, 2.4rem);
}

.footer__title {
  margin-bottom: 0.9rem;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--lime);
}

.footer__list {
  display: grid;
  gap: 0.6rem;
}

.footer__link {
  display: inline-block;
  padding-bottom: 1px;
  font-size: 0.94rem;
  color: #DBE7E5;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.footer__link:hover {
  color: var(--orange-soft);
  border-color: var(--orange-soft);
}

.footer__link--sm {
  font-size: 0.8rem;
  color: rgba(211, 226, 224, 0.78);
}

.footer__contact-line {
  font-size: 0.92rem;
  line-height: 1.6;
  color: #DBE7E5;
  overflow-wrap: anywhere;
}

.footer__contact-line.mono {
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--orange-soft);
}

.footer__bottom {
  position: relative;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 1.2rem var(--gutter) 1.9rem;
  border-top: 1px solid rgba(182, 243, 107, 0.18);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 1.4rem;
  font-size: 0.8rem;
  color: rgba(211, 226, 224, 0.72);
}

.footer__legal {
  margin: 0;
  letter-spacing: 0.06em;
}

.footer__meta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1rem;
}

.footer__note {
  flex-basis: 100%;
  margin: 0;
  max-width: 72ch;
  font-size: 0.78rem;
  line-height: 1.7;
  color: rgba(211, 226, 224, 0.56);
}

/* ---------- keyframes ---------- */
@keyframes dot-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(182, 243, 107, 0.65); }
  50% { box-shadow: 0 0 0 6px rgba(182, 243, 107, 0); }
}

@keyframes nav-open {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes panel-in {
  from { opacity: 0; transform: translateX(8px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .masthead__service { display: none; }
  .col-4 { grid-column: span 6; }
  .col-5 { grid-column: span 6; }
  .col-7 { grid-column: span 12; }
  .col-8 { grid-column: span 12; }
}

@media (max-width: 900px) {
  .masthead {
    grid-template-columns: auto minmax(0, 1fr) auto;
    min-height: 64px;
    gap: 0.6rem;
  }

  .brand { padding: 0.45rem 0.2rem; }
  .brand__name { font-size: clamp(1.25rem, 5.4vw, 1.55rem); letter-spacing: 0.16em; text-indent: 0.16em; }
  .brand__descriptor { font-size: 9px; letter-spacing: 0.3em; text-indent: 0.3em; }
  .masthead__meta { font-size: 10px; letter-spacing: 0.1em; gap: 0.35rem; }

  .nav-bar {
    justify-content: space-between;
    padding: 0.5rem var(--gutter) 0.6rem;
  }

  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    top: calc(100% + 6px);
    left: var(--gutter);
    right: var(--gutter);
    z-index: 75;
    display: none;
    max-height: min(70vh, 520px);
    overflow: auto;
    padding: 0.7rem;
    background: var(--snow);
    border: 1px solid var(--line-strong);
    border-radius: 16px;
    box-shadow: 0 30px 52px -30px rgba(7, 47, 54, 0.9);
  }

  .site-nav[data-open] {
    display: block;
    animation: nav-open 0.24s var(--ease) both;
  }

  .site-nav__list {
    display: grid;
    gap: 0.15rem;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: none;
  }

  .site-nav__item { width: 100%; }

  .site-nav__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 0.95rem;
    border-radius: 10px;
    font-size: 1rem;
  }

  .site-nav__link[aria-current="page"] {
    box-shadow: none;
  }

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

  .grid-12 { grid-template-columns: minmax(0, 1fr); gap: 1rem; }
  .col-4, .col-5, .col-7, .col-8, .col-12 { grid-column: span 1; }

  .footer__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }

  .footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__col--contact { grid-column: span 2; }
}

@media (max-width: 560px) {
  .masthead__edition { display: none; }
  .masthead__sync { display: none; }
  .brand__descriptor { font-size: 8px; letter-spacing: 0.24em; text-indent: 0.24em; }

  .footer__cols { grid-template-columns: minmax(0, 1fr); }
  .footer__col--contact { grid-column: span 1; }

  .footer__bottom { font-size: 0.76rem; }

  .tabs__list { border-radius: 14px; }
  .tabs__btn { padding: 0.5rem 0.85rem; font-size: 0.85rem; }
}

/* ---------- 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;
    scroll-behavior: auto !important;
  }

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

  .status-dot { animation: none; box-shadow: none; }

  .scroll-progress__fill { transition: none; }
}