/* ==========================================================================
   site.css — 超凡娱乐会馆 共享外壳
   /assets/site.css
   ========================================================================== */

/* ---------- 1. 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, h5, h6,
p, figure, blockquote, dl, dd, ul, ol { 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%; }

img { height: auto; }

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

::selection {
  background: rgba(53, 240, 208, .32);
  color: #FFFFFF;
}

/* ---------- 2. Tokens ---------- */
:root {
  --ink-deep: #05060E;
  --ink: #070B1E;
  --panel: #101A3A;
  --panel-deep: #0B1330;
  --cyan: #35F0D0;
  --cyan-soft: #7CF7E4;
  --magenta: #FF3D9A;
  --amber: #FFB25B;
  --text: #F2F5FF;
  --muted: #9AA6C8;
  --line: #2A3560;
  --line-soft: rgba(42, 53, 96, .55);

  --font-display: "Inter", "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --shell: 1240px;
  --gutter: 24px;
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --pill: 999px;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-space: 104px;

  --glow-cyan: 0 18px 40px -24px rgba(53, 240, 208, .55);
  --shadow-lift: 0 30px 60px -36px rgba(0, 0, 0, .95);
}

@media (min-width: 768px) { :root { --gutter: 48px; } }
@media (min-width: 1200px) { :root { --gutter: 80px; } }
@media (max-width: 1023px) { :root { --header-space: 86px; } }

/* ---------- 3. Base ---------- */
body {
  min-height: 100vh;
  padding-top: var(--header-space);
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 620px at 88% -8%, rgba(255, 61, 154, .14), transparent 62%),
    radial-gradient(900px 520px at 2% 4%, rgba(53, 240, 208, .10), transparent 66%),
    linear-gradient(rgba(42, 53, 96, .22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42, 53, 96, .22) 1px, transparent 1px);
  background-size: auto, auto, 96px 96px, 96px 96px;
  background-repeat: no-repeat, no-repeat, repeat, repeat;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  overflow-x: hidden;
}

:focus-visible {
  outline: 2px solid var(--cyan-soft);
  outline-offset: 3px;
}

.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;
}

/* ---------- 4. Skip link ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: 50%;
  z-index: 300;
  transform: translate(-50%, -180%);
  padding: 10px 22px;
  border-radius: var(--pill);
  background: var(--cyan);
  color: #04141A;
  font-weight: 700;
  font-size: 15px;
  box-shadow: var(--glow-cyan);
  transition: transform .22s var(--ease);
}

.skip-link:focus-visible {
  transform: translate(-50%, 0);
  outline-offset: 4px;
}

/* ---------- 5. Shell / section / typography helpers ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(56px, 8vw, 110px); }
.section--tight { padding-block: clamp(32px, 4.5vw, 64px); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.h-display {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.4rem, 6.2vw, 5rem);
  line-height: 1.02;
  letter-spacing: -.025em;
}

.h-section {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 3.4vw, 2.75rem);
  line-height: 1.14;
  letter-spacing: -.015em;
}

.h-sub {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  letter-spacing: .06em;
  color: var(--cyan-soft);
}

.tilt {
  display: inline-block;
  transform: skewX(-3deg);
  transform-origin: left bottom;
}

.lede {
  max-width: 34em;
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  color: var(--muted);
}

.prose {
  max-width: 38em;
  color: var(--text);
  line-height: 1.78;
}

.prose p + p,
.prose p + ul,
.prose ul + p { margin-top: 1.05em; }

.prose h2,
.prose h3 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -.01em;
  margin-top: 1.8em;
  margin-bottom: .55em;
}

.prose h2 { font-size: clamp(1.4rem, 2.4vw, 1.85rem); }
.prose h3 { font-size: clamp(1.15rem, 1.8vw, 1.35rem); }

.prose a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(53, 240, 208, .42);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.prose a:hover { color: var(--cyan-soft); border-color: var(--cyan-soft); }

.prose ul { padding-left: 1.15em; list-style: disc; }
.prose li + li { margin-top: .45em; }
.prose strong { color: var(--cyan-soft); font-weight: 700; }

/* ---------- 6. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: var(--pill);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.3;
  white-space: nowrap;
  transition:
    transform .24s var(--ease),
    box-shadow .24s var(--ease),
    background-color .24s var(--ease),
    border-color .24s var(--ease),
    color .24s var(--ease);
}

.btn--primary {
  background: var(--cyan);
  color: #04141A;
  box-shadow: var(--glow-cyan);
}

.btn--primary:hover {
  background: var(--cyan-soft);
  transform: translateY(-2px);
  box-shadow: 0 22px 44px -22px rgba(53, 240, 208, .8);
}

.btn--ghost {
  color: var(--text);
  background: rgba(255, 255, 255, .02);
  border-color: var(--line);
}

.btn--ghost:hover {
  color: var(--cyan-soft);
  border-color: rgba(124, 247, 228, .62);
  transform: translateY(-2px);
}

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

/* ---------- 7. Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 120;
  padding: 18px 0 0;
  pointer-events: none;
}

.scroll-rail {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: rgba(42, 53, 96, .5);
  overflow: hidden;
}

.scroll-rail__fill {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--magenta));
  transition: width .14s linear;
}

.header-inner {
  position: relative;
  pointer-events: auto;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* 品牌浮岛 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 16px 7px 7px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(16, 26, 58, .82);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  backdrop-filter: blur(16px) saturate(130%);
  flex: none;
  transition:
    transform .24s var(--ease),
    border-color .24s var(--ease),
    background-color .24s var(--ease);
}

.brand:hover {
  transform: translateY(-2px);
  border-color: rgba(53, 240, 208, .55);
  background: rgba(16, 26, 58, .95);
}

.brand__glyph {
  position: relative;
  width: 36px;
  height: 36px;
  flex: none;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--cyan) 0%, var(--magenta) 100%);
  box-shadow: 0 0 0 1px rgba(53, 240, 208, .35), 0 10px 22px -12px rgba(53, 240, 208, .9);
}

.brand__glyph::after {
  content: "";
  position: absolute;
  inset: 9px;
  border-radius: 6px;
  background: var(--ink);
}

.brand__text {
  display: flex;
  flex-direction: column;
  gap: 1px;
  line-height: 1.15;
}

.brand__name {
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--text);
}

.brand__sub {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  color: var(--muted);
  text-transform: uppercase;
}

/* 导航浮岛 */
.nav-dock {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-left: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(16, 26, 58, .82);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  backdrop-filter: blur(16px) saturate(130%);
  box-shadow: 0 24px 48px -32px rgba(0, 0, 0, .95);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  display: block;
  padding: 8px 13px;
  border-radius: var(--pill);
  font-size: 14.5px;
  font-weight: 500;
  color: var(--muted);
  transition:
    color .22s var(--ease),
    background-color .22s var(--ease),
    box-shadow .22s var(--ease);
}

.nav-link:hover {
  color: var(--text);
  background: rgba(53, 240, 208, .10);
}

.nav-link[aria-current="page"] {
  color: var(--cyan);
  background: rgba(53, 240, 208, .12);
  box-shadow: inset 0 0 0 1px rgba(53, 240, 208, .42);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 4px;
  padding-left: 10px;
  border-left: 1px solid var(--line);
}

/* 收缩 / 移动按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 18px 10px 15px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(16, 26, 58, .92);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  backdrop-filter: blur(16px) saturate(130%);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .04em;
  transition: border-color .24s var(--ease), transform .24s var(--ease);
}

.nav-toggle:hover { border-color: rgba(53, 240, 208, .55); }

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 16px;
  height: 14px;
}

.nav-toggle__bars i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform .26s var(--ease), opacity .2s var(--ease);
}

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

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

.nav-toggle__label { line-height: 1; }

/* ---------- 8. Header responsive ---------- */
@media (max-width: 1023px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: var(--gutter);
    right: var(--gutter);
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    padding: 16px;
    border-radius: var(--radius-lg);
    max-height: calc(100vh - 140px);
    overflow-y: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .nav-link {
    padding: 12px 16px;
    font-size: 16px;
  }

  .nav-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    margin-left: 0;
    padding-left: 0;
    padding-top: 14px;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .nav-actions .btn { width: 100%; padding: 12px 18px; font-size: 15px; }

  .site-header[data-open="true"] .site-nav { display: flex; }

  .brand__sub { display: none; }
  .brand__name { font-size: 15.5px; }
  .brand__glyph { width: 32px; height: 32px; border-radius: 10px; }
  .brand__glyph::after { inset: 8px; border-radius: 5px; }
}

@media (min-width: 1024px) {
  .site-header.is-compact .nav-toggle { display: inline-flex; }

  .site-header.is-compact .site-nav { display: none; }

  .site-header.is-compact[data-open="true"] .site-nav {
    display: flex;
    position: absolute;
    top: calc(100% + 10px);
    right: var(--gutter);
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    min-width: 262px;
    padding: 16px;
    border-radius: var(--radius-lg);
  }

  .site-header.is-compact[data-open="true"] .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-header.is-compact[data-open="true"] .nav-link {
    padding: 11px 15px;
    font-size: 15px;
  }

  .site-header.is-compact[data-open="true"] .nav-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    margin-left: 0;
    padding-left: 0;
    padding-top: 14px;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
}

/* ---------- 9. Footer ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 120px);
  padding-top: clamp(48px, 7vw, 88px);
  background:
    radial-gradient(900px 420px at 90% 0%, rgba(255, 61, 154, .13), transparent 68%),
    var(--ink-deep);
  border-top: 1px solid var(--line);
  overflow: hidden;
}

.footer-beam {
  position: absolute;
  top: -50px;
  left: -12%;
  right: -12%;
  height: 220px;
  pointer-events: none;
  transform: skewY(-4deg);
  background: linear-gradient(100deg,
      transparent 12%,
      rgba(53, 240, 208, .16) 42%,
      rgba(255, 61, 154, .18) 68%,
      transparent 90%);
  filter: blur(1px);
}

.footer-shell {
  position: relative;
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding: 0 var(--gutter) 32px;
}

.footer-top {
  display: grid;
  gap: clamp(36px, 5vw, 56px);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 30em;
}

.brand--footer {
  align-self: flex-start;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.brand--footer:hover {
  transform: none;
  border-color: transparent;
  background: none;
}

.footer-lede {
  font-family: var(--font-serif);
  font-size: 15.5px;
  line-height: 1.8;
  letter-spacing: .04em;
  color: var(--cyan-soft);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 4px;
  border-top: 1px solid var(--line-soft);
}

.footer-contact__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding-top: 10px;
  font-size: 14.5px;
}

.footer-contact__key {
  flex: none;
  min-width: 40px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
  line-height: 1.9;
}

.footer-contact__val {
  color: var(--text);
  word-break: break-word;
}

.footer-contact__note {
  padding-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.footer-nav {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.footer-col__title {
  margin-bottom: 12px;
  font-family: var(--font-serif);
  font-size: 14.5px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--cyan);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-link {
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  color: var(--muted);
  transition: color .22s var(--ease), transform .24s var(--ease);
}

.footer-link:hover {
  color: var(--text);
  transform: translateX(4px);
}

.footer-link[aria-current="page"] {
  color: var(--cyan);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  margin-top: clamp(40px, 6vw, 64px);
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .07em;
  color: var(--muted);
}

.footer-legal { text-transform: uppercase; }

.footer-sign { color: var(--muted); }

.footer-year {
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

@media (min-width: 768px) {
  .footer-nav { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
}

@media (min-width: 1024px) {
  .footer-top {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: clamp(40px, 6vw, 80px);
  }
  .footer-nav { gap: 32px; }
}

/* ---------- 10. Breadcrumb ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--muted);
  transition: color .2s var(--ease);
}

.breadcrumb a:hover { color: var(--cyan); }

.breadcrumb__sep {
  color: var(--line);
  font-size: 11px;
}

.breadcrumb [aria-current="page"] { color: var(--cyan-soft); }

/* ---------- 11. Tags / chips ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid rgba(53, 240, 208, .32);
  border-radius: var(--pill);
  background: rgba(53, 240, 208, .10);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  line-height: 1.6;
}

.tag--amber {
  color: var(--amber);
  background: rgba(255, 178, 91, .10);
  border-color: rgba(255, 178, 91, .34);
}

.tag--magenta {
  color: #FF8CC4;
  background: rgba(255, 61, 154, .12);
  border-color: rgba(255, 61, 154, .36);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  background: rgba(16, 26, 58, .7);
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  transition:
    color .22s var(--ease),
    border-color .22s var(--ease),
    background-color .22s var(--ease),
    transform .22s var(--ease);
}

.chip:hover {
  color: var(--text);
  border-color: rgba(53, 240, 208, .48);
  transform: translateY(-2px);
}

.chip[aria-pressed="true"] {
  color: #04141A;
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 700;
}

/* ---------- 12. Cards ---------- */
.card {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(16, 26, 58, .92), rgba(11, 19, 48, .92));
  transition:
    transform .28s var(--ease),
    box-shadow .28s var(--ease),
    border-color .28s var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  border-color: rgba(53, 240, 208, .42);
}

.card--static:hover {
  transform: none;
  box-shadow: none;
  border-color: var(--line);
}

/* ---------- 13. Frame (框景 + 刻度角标) ---------- */
.frame {
  position: relative;
  padding: clamp(20px, 4vw, 52px);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(160deg, rgba(16, 26, 58, .55), rgba(5, 6, 14, .35));
}

.frame::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  opacity: .8;
  background:
    linear-gradient(var(--cyan), var(--cyan)) 0 0 / 22px 1px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) 0 0 / 1px 22px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) 100% 0 / 22px 1px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) 100% 0 / 1px 22px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) 0 100% / 22px 1px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) 0 100% / 1px 22px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) 100% 100% / 22px 1px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) 100% 100% / 1px 22px no-repeat;
}

/* ---------- 14. Media 图片容器 ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background-color: var(--panel-deep);
  background-image:
    radial-gradient(120% 90% at 18% 0%, rgba(53, 240, 208, .20), transparent 58%),
    radial-gradient(110% 85% at 92% 102%, rgba(255, 61, 154, .20), transparent 60%),
    linear-gradient(155deg, transparent 38%, rgba(42, 53, 96, .55) 50%, transparent 62%);
}

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

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

.media__caption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--muted);
}

@media (max-width: 767px) {
  .media { border-radius: var(--radius-lg); }
}

/* ---------- 15. Timeline ---------- */
.timeline {
  position: relative;
  padding-left: 30px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg,
      var(--cyan),
      rgba(255, 61, 154, .55) 55%,
      transparent 100%);
}

.timeline__item {
  position: relative;
  padding-block: 14px;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 24px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 240, 208, .10);
}

/* ---------- 16. Accordion ---------- */
.accordion {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(16, 26, 58, .62);
  transition: border-color .24s var(--ease), background-color .24s var(--ease);
}

.accordion + .accordion { margin-top: 10px; }

.accordion[open] {
  border-color: rgba(53, 240, 208, .42);
  background: rgba(16, 26, 58, .85);
}

.accordion summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  list-style: none;
}

.accordion summary::-webkit-details-marker { display: none; }

.accordion summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
  transition: transform .24s var(--ease);
}

.accordion[open] summary::after { transform: rotate(45deg); }

.accordion__body {
  padding: 0 22px 20px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
}

/* ---------- 17. Grid & split utilities ---------- */
.grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 210px), 1fr)); }

.split {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
}

@media (min-width: 900px) {
  .split { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; }
  .split--offset { grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); }
}

/* ---------- 18. Slanted rule ---------- */
.rule-slant {
  height: 1px;
  border: 0;
  margin: clamp(32px, 5vw, 68px) 0;
  transform: rotate(-1.4deg);
  transform-origin: center;
  background: linear-gradient(90deg,
      transparent 0%,
      var(--line) 18%,
      var(--cyan) 50%,
      var(--line) 82%,
      transparent 100%);
  opacity: .75;
}

/* ---------- 19. Reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}

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

/* ---------- 20. Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

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

  .card:hover,
  .chip:hover,
  .btn:hover,
  .footer-link:hover,
  .brand:hover {
    transform: none;
  }
}