/* ==========================================================================
   乐竟体育 · 共享样式表 /assets/site.css
   深空蓝数据舱 · 技术蓝图网格 · 电子记分牌数字
   ========================================================================== */

/* 1. 令牌 ---------------------------------------------------------------- */
:root {
  --deep-space-blue: #071A2B;
  --panel-navy: #0D2438;
  --turf-green: #1F6B4A;
  --signal-orange: #FF6B2C;
  --fluoro-cyan: #22E0D6;
  --mineral-gray: #8A9BA8;
  --moss-green: #708C5B;
  --terracotta: #C86B4A;
  --off-white: #F2F0E8;
  --line-blue: #1E4A6B;

  --ink: #F2F0E8;
  --ink-soft: rgba(242, 240, 232, 0.74);
  --ink-mute: rgba(242, 240, 232, 0.54);
  --hairline: rgba(30, 74, 107, 0.85);
  --hairline-soft: rgba(30, 74, 107, 0.5);

  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-16: 1rem;
  --fs-20: 1.25rem;
  --fs-28: 1.75rem;
  --fs-44: 2.75rem;
  --fs-72: 4.5rem;
  --fs-112: 7rem;

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

  --wrap: 1280px;
  --gutter: clamp(1rem, 3vw, 2.5rem);
  --radius: 2px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* 2. 重置 ---------------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 9.5rem;
}

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

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

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

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

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

/* 3. 基础排版 ------------------------------------------------------------ */
body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--fs-16);
  font-weight: 400;
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--deep-space-blue);
  background-image:
    linear-gradient(to right, rgba(30, 74, 107, 0.22) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 74, 107, 0.22) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(120% 80% at 78% -12%, rgba(34, 224, 214, 0.10), transparent 62%),
    radial-gradient(90% 70% at 4% 108%, rgba(31, 107, 74, 0.30), transparent 66%);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: 0.02em;
}

h1 { font-size: clamp(2rem, 5vw, var(--fs-44)); }
h2 { font-size: clamp(1.5rem, 3.4vw, var(--fs-28)); }
h3 { font-size: var(--fs-20); }

strong { font-weight: 600; color: var(--off-white); }

::selection {
  background: rgba(34, 224, 214, 0.28);
  color: var(--off-white);
}

:focus-visible {
  outline: 2px solid var(--fluoro-cyan);
  outline-offset: 2px;
  border-radius: 1px;
}

#main-content {
  display: block;
  scroll-margin-top: 9.5rem;
}

/* 4. 布局容器 ------------------------------------------------------------ */
.wrap {
  width: min(var(--wrap), 100% - (var(--gutter) * 2));
  margin-inline: auto;
}

.section {
  position: relative;
  padding-block: clamp(2.5rem, 6vw, 5rem);
}

.section--tight { padding-block: clamp(1.5rem, 3.5vw, 2.75rem); }

.section__head {
  display: grid;
  gap: 0.75rem;
  max-width: 62ch;
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.section__index {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--fluoro-cyan);
}

.section__title {
  font-size: clamp(1.6rem, 3.8vw, var(--fs-44));
  font-weight: 400;
  letter-spacing: 0.03em;
  color: var(--off-white);
}

.section__desc {
  max-width: 68ch;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--ink-soft);
}

.grid-9 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--hairline);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
}

.grid-9__cell {
  min-height: 0;
  padding: clamp(1rem, 2vw, 1.6rem);
  background-color: rgba(7, 26, 43, 0.92);
}

/* 5. 页头 ---------------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -6rem;
  z-index: 200;
  padding: 0.65rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--deep-space-blue);
  background: var(--fluoro-cyan);
  border-radius: var(--radius);
  transition: top 0.18s var(--ease);
}

.skip-link:focus { top: 0.75rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(7, 26, 43, 0.99), rgba(7, 26, 43, 0.94));
  border-bottom: 1px solid var(--hairline);
}

.header-meta {
  border-bottom: 1px solid var(--hairline-soft);
  background: linear-gradient(90deg, rgba(13, 36, 56, 0.9), rgba(7, 26, 43, 0.7));
}

.header-meta__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem 1.5rem;
  min-height: 38px;
  padding-block: 0.4rem;
}

.brand-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--mineral-gray);
}

.brand-line__mark {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--fluoro-cyan);
  box-shadow: 0 0 0 3px rgba(34, 224, 214, 0.18);
  animation: pulse-dot 2.6s ease-in-out infinite;
}

.brand-line__text {
  color: var(--off-white);
  font-weight: 500;
  letter-spacing: 0.14em;
}

.brand-line__sub {
  position: relative;
  padding-left: 0.9rem;
  color: var(--mineral-gray);
}

.brand-line__sub::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  height: 1px;
  background: var(--line-blue);
}

.utility-nav__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.25rem;
}

.utility-nav__link {
  display: inline-block;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--mineral-gray);
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.utility-nav__link:hover {
  color: var(--fluoro-cyan);
  border-bottom-color: var(--fluoro-cyan);
}

.utility-nav__link[aria-current="page"] {
  color: var(--fluoro-cyan);
  border-bottom-color: rgba(34, 224, 214, 0.6);
}

.header-bar__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 0.6rem;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: 1 1 auto;
}

.brand-mark__glyph {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--off-white);
  background: linear-gradient(140deg, var(--turf-green), #16412f);
  border: 1px solid rgba(34, 224, 214, 0.4);
  border-radius: var(--radius);
}

.brand-mark__text {
  display: flex;
  flex-direction: column;
  gap: 1px;
  line-height: 1.1;
}

.brand-mark__name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--off-white);
}

.brand-mark__tag {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--fluoro-cyan);
}

.primary-nav {
  display: flex;
  align-items: center;
}

.primary-nav__list {
  display: flex;
  align-items: stretch;
  gap: clamp(0.15rem, 1vw, 0.9rem);
}

.primary-nav__item { display: flex; }

.primary-nav__link {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0.5rem 0.65rem;
  border-left: 2px solid transparent;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.primary-nav__idx {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  color: rgba(138, 155, 168, 0.8);
  transition: color 0.2s var(--ease);
}

.primary-nav__label {
  font-size: 0.9375rem;
  letter-spacing: 0.1em;
  color: var(--off-white);
  transition: color 0.2s var(--ease);
}

.primary-nav__link:hover {
  background-color: rgba(34, 224, 214, 0.07);
  border-left-color: rgba(34, 224, 214, 0.45);
}

.primary-nav__link:hover .primary-nav__idx,
.primary-nav__link:hover .primary-nav__label { color: var(--fluoro-cyan); }

.primary-nav__link[aria-current="page"] {
  background: linear-gradient(90deg, rgba(255, 107, 44, 0.18), transparent);
  border-left-color: var(--signal-orange);
}

.primary-nav__link[aria-current="page"] .primary-nav__idx { color: var(--signal-orange); }
.primary-nav__link[aria-current="page"] .primary-nav__label { color: var(--off-white); }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background: rgba(13, 36, 56, 0.85);
}

.nav-toggle__bars {
  display: grid;
  gap: 4px;
  width: 20px;
}

.nav-toggle__bars span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--fluoro-cyan);
  transition: background-color 0.2s var(--ease), width 0.2s var(--ease);
}

.nav-toggle__bars span:nth-child(2) { width: 68%; }

.nav-toggle__label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.2em;
  color: var(--mineral-gray);
}

.nav-toggle[aria-expanded="true"] {
  border-color: rgba(255, 107, 44, 0.6);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars span { background: var(--signal-orange); }
.nav-toggle[aria-expanded="true"] .nav-toggle__label { color: var(--off-white); }

.header-rail {
  height: 2px;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(34, 224, 214, 0.55) 0 14px,
    rgba(30, 74, 107, 0) 14px 36px
  );
  background-size: 200% 100%;
  animation: rail-scan 26s linear infinite;
  opacity: 0.6;
}

/* 6. 页脚 ---------------------------------------------------------------- */
.site-footer {
  position: relative;
  margin-top: clamp(3rem, 7vw, 6rem);
  border-top: 1px solid var(--hairline);
  background:
    linear-gradient(180deg, rgba(13, 36, 56, 0.86), rgba(7, 26, 43, 1)),
    var(--deep-space-blue);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34, 224, 214, 0.5), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.3fr 0.9fr;
  gap: clamp(1.5rem, 3vw, 3rem);
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.footer-col { min-width: 0; }

.footer-title {
  margin-bottom: 1rem;
  padding-bottom: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--fluoro-cyan);
  border-bottom: 1px solid var(--hairline-soft);
}

.footer-note {
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--ink-soft);
}

.footer-note + .footer-note { margin-top: 0.85rem; }

.footer-note--dim {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  color: var(--mineral-gray);
}

.footer-list {
  display: grid;
  gap: 0.55rem;
}

.footer-list__item { display: flex; }

.footer-link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: var(--fs-14);
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  transition: color 0.2s var(--ease);
}

.footer-link::before {
  content: "";
  align-self: center;
  width: 7px;
  height: 1px;
  flex: 0 0 auto;
  background: var(--line-blue);
  transition: width 0.2s var(--ease), background-color 0.2s var(--ease);
}

.footer-link:hover { color: var(--fluoro-cyan); }

.footer-link:hover::before {
  width: 15px;
  background: var(--fluoro-cyan);
}

.footer-link[aria-current="page"] { color: var(--off-white); }
.footer-link[aria-current="page"]::before { background: var(--signal-orange); }

.footer-contact {
  display: grid;
  gap: 0.8rem;
}

.footer-contact__row {
  display: grid;
  gap: 0.15rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px dashed var(--hairline-soft);
}

.footer-contact__key {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mineral-gray);
}

.footer-contact__val {
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--off-white);
  word-break: break-word;
}

.footer-bottom {
  border-top: 1px solid var(--hairline-soft);
  background: rgba(7, 26, 43, 0.72);
}

.footer-bottom__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.75rem;
  padding-block: 1.1rem;
  font-size: var(--fs-12);
  letter-spacing: 0.05em;
  color: var(--mineral-gray);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.4rem;
}

.footer-legal .footer-link { font-size: var(--fs-12); }

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
}

.footer-meta__icp { color: var(--mineral-gray); }

.footer-pulse {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--fluoro-cyan);
}

.footer-pulse::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--fluoro-cyan);
  box-shadow: 0 0 0 3px rgba(34, 224, 214, 0.16);
  animation: pulse-dot 2.6s ease-in-out infinite;
}

/* 7. 通用组件 ------------------------------------------------------------ */
.kicker {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--fluoro-cyan);
}

.lede {
  max-width: 62ch;
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  line-height: 1.85;
  color: var(--ink-soft);
}

.divider-rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, rgba(34, 224, 214, 0.5), rgba(30, 74, 107, 0.12));
}

.prose {
  max-width: 72ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--ink-soft);
}

.prose p + p,
.prose p + ul,
.prose ul + p { margin-top: 1em; }

.prose h2 {
  margin-top: 1.9em;
  margin-bottom: 0.6em;
  font-size: clamp(1.3rem, 2.6vw, var(--fs-28));
  color: var(--off-white);
}

.prose h3 {
  margin-top: 1.6em;
  margin-bottom: 0.5em;
  color: var(--off-white);
}

.prose ul {
  display: grid;
  gap: 0.5em;
  padding-left: 0;
}

.prose li {
  position: relative;
  padding-left: 1.2rem;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--fluoro-cyan);
}

.prose a {
  color: var(--fluoro-cyan);
  border-bottom: 1px solid rgba(34, 224, 214, 0.4);
}

.panel {
  background: linear-gradient(180deg, rgba(13, 36, 56, 0.92), rgba(13, 36, 56, 0.62));
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  box-shadow: 0 1px 0 rgba(34, 224, 214, 0.06), 0 18px 40px -32px rgba(0, 0, 0, 0.9);
  overflow: hidden;
}

.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--fluoro-cyan);
  border-bottom: 1px solid var(--hairline);
  background: rgba(7, 26, 43, 0.5);
}

.panel__body { padding: clamp(1rem, 2vw, 1.4rem); }

.data-list { display: grid; }

.data-list__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--hairline-soft);
}

.data-list__row:last-child { border-bottom: 0; }

.data-list__key {
  font-size: var(--fs-14);
  letter-spacing: 0.05em;
  color: var(--ink-mute);
}

.data-list__val {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--off-white);
}

.stat { display: grid; gap: 0.3rem; }

.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, var(--fs-44));
  font-weight: 400;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--off-white);
}

.stat__label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mineral-gray);
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.num--xl {
  display: block;
  font-size: clamp(2.75rem, 9vw, var(--fs-112));
  font-weight: 300;
  line-height: 0.92;
  color: var(--off-white);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.75rem 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--off-white);
  background: rgba(13, 36, 56, 0.8);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease),
    color 0.2s var(--ease), transform 0.2s var(--ease);
}

.btn:hover { border-color: var(--fluoro-cyan); color: var(--fluoro-cyan); }
.btn:active { transform: translateY(1px); }

.btn--primary {
  color: #0A1219;
  font-weight: 700;
  background: linear-gradient(120deg, var(--signal-orange), #FF9558);
  border-color: transparent;
}

.btn--primary:hover {
  color: #0A1219;
  border-color: transparent;
  background: linear-gradient(120deg, #FF7F45, #FFA874);
}

.btn--ghost {
  color: var(--fluoro-cyan);
  background: transparent;
  border-color: rgba(34, 224, 214, 0.5);
}

.btn--quiet {
  padding-inline: 0.35rem;
  color: var(--mineral-gray);
  background: transparent;
  border-color: transparent;
}

.btn--quiet:hover { color: var(--fluoro-cyan); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.22rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mineral-gray);
  border: 1px solid currentColor;
  border-radius: var(--radius);
  white-space: nowrap;
}

.tag--cyan { color: var(--fluoro-cyan); }
.tag--orange { color: var(--signal-orange); }
.tag--moss { color: var(--moss-green); }
.tag--terracotta { color: var(--terracotta); }

.figure {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(31, 107, 74, 0.4), rgba(13, 36, 56, 0.95)),
    repeating-linear-gradient(90deg, rgba(30, 74, 107, 0.4) 0 1px, transparent 1px 44px);
  box-shadow: 0 20px 44px -34px rgba(0, 0, 0, 0.95);
}

.figure__img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  height: auto;
}

.figure--wide .figure__img { aspect-ratio: 21 / 9; }
.figure--tall .figure__img { aspect-ratio: 3 / 4; }

.figure__cap {
  padding: 0.6rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--mineral-gray);
  border-top: 1px solid var(--hairline-soft);
  background: rgba(7, 26, 43, 0.6);
}

.breadcrumbs {
  padding-block: 0.9rem;
  border-bottom: 1px solid var(--hairline-soft);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
}

.breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumbs__item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--mineral-gray);
}

.breadcrumbs__sep { color: var(--line-blue); }

.breadcrumbs__link {
  color: var(--mineral-gray);
  transition: color 0.2s var(--ease);
}

.breadcrumbs__link:hover { color: var(--fluoro-cyan); }

.breadcrumbs__current { color: var(--off-white); }

/* 8. 动效与显现 ---------------------------------------------------------- */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 120;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--fluoro-cyan), var(--signal-orange));
  pointer-events: none;
}

.has-js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

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

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.82); }
}

@keyframes rail-scan {
  from { background-position: 0 0; }
  to { background-position: 200% 0; }
}

/* 9. 响应式 -------------------------------------------------------------- */
@media (max-width: 1080px) {
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 1024px) {
  html { scroll-padding-top: 7.5rem; }

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

  .primary-nav {
    display: none;
    width: 100%;
    flex-basis: 100%;
    margin-top: 0.35rem;
    border-top: 1px solid var(--hairline);
  }

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

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

  .primary-nav__item {
    border-bottom: 1px solid var(--hairline-soft);
  }

  .primary-nav__item:last-child { border-bottom: 0; }

  .primary-nav__link {
    flex-direction: row;
    align-items: baseline;
    justify-content: flex-start;
    gap: 0.9rem;
    padding: 0.85rem 0.35rem;
    border-left-width: 2px;
  }

  .primary-nav__link[aria-current="page"] {
    background: linear-gradient(90deg, rgba(255, 107, 44, 0.2), transparent 70%);
  }
}

@media (max-width: 900px) {
  .grid-9 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .brand-line__sub { display: none; }
  .header-meta__inner { gap: 0.35rem 1rem; }
  .utility-nav__list { gap: 0.35rem 1rem; }
  .section { padding-block: clamp(2rem, 8vw, 3.25rem); }
}

@media (max-width: 620px) {
  body { background-size: 60px 60px; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .grid-9 { grid-template-columns: minmax(0, 1fr); }
  .footer-bottom__inner { flex-direction: column; align-items: flex-start; }
  .brand-mark__name { font-size: 1.05rem; letter-spacing: 0.12em; }
  .panel__head { letter-spacing: 0.16em; }
}

@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;
  }

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