:root {
  --xy-purple: #2D1B4E;
  --xy-purple-deep: #210F38;
  --xy-purple-soft: #3C2A6D;
  --xy-gold: #D4AF37;
  --xy-gold-dark: #B8962E;
  --xy-gold-soft: rgba(212, 175, 55, 0.22);
  --xy-orange: #FF6B35;
  --xy-orange-dark: #E04E1A;
  --xy-ink: #0D0A14;
  --xy-ink-soft: #1C1426;
  --xy-cream: #F5E9C4;
  --xy-mist: #9A8DB8;
  --xy-white: #FFFFFF;
  --xy-tracking: 0.02em;
  --xy-serif: Georgia, 'Times New Roman', serif;
  --xy-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --xy-sans-display: 'Arial Black', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --xy-header-w: 248px;
  --xy-radius: 4px;
  --xy-shadow: 0 16px 44px rgba(0, 0, 0, 0.35);
  --xy-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  background: var(--xy-ink);
}

body {
  font-family: var(--xy-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--xy-cream);
  background: var(--xy-purple);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  opacity: 0.32;
  background-image: radial-gradient(rgba(245, 233, 196, 0.06) 0.55px, transparent 0.55px);
  background-size: 5px 5px;
  mix-blend-mode: overlay;
}

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

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

ul,
ol {
  list-style: none;
}

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

:focus-visible {
  outline: 3px solid var(--xy-gold);
  outline-offset: 3px;
  border-radius: 2px;
}

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

.skip-hide,
.xy-skip:not(:focus) {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.xy-skip {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1200;
  background: var(--xy-ink);
  color: var(--xy-gold);
  border: 1px solid var(--xy-gold);
  border-radius: var(--xy-radius);
  padding: 8px 16px;
  font-size: 14px;
}

.xy-skip:focus {
  position: fixed;
  width: auto;
  height: auto;
  clip: auto;
  white-space: normal;
}

#main-content {
  display: block;
  min-height: 70vh;
}

/* ---------- Header ---------- */
.xy-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1000;
  width: var(--xy-header-w);
  background: var(--xy-ink);
  border-right: 1px solid rgba(212, 175, 55, 0.26);
  overflow: visible;
}

.xy-header__inner {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 32px 20px;
  background:
    linear-gradient(160deg, rgba(212, 175, 55, 0.06) 0%, transparent 40%),
    linear-gradient(0deg, rgba(61, 42, 109, 0.2), transparent 80%);
}

.xy-header__top {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.xy-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.xy-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 6px;
  transform: rotate(45deg);
  background: linear-gradient(135deg, var(--xy-gold), var(--xy-gold-dark));
  color: var(--xy-ink);
  font-family: var(--xy-sans-display);
  font-size: 22px;
  flex: 0 0 auto;
  box-shadow: 0 0 28px rgba(212, 175, 55, 0.3);
}

.xy-brand__mark::first-letter {
  display: inline-block;
  transform: rotate(-45deg);
}

.xy-brand__mark {
  transition: transform 0.3s var(--xy-ease);
}

.xy-brand:hover .xy-brand__mark {
  transform: rotate(225deg);
}

.xy-brand__name {
  font-family: var(--xy-sans-display);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: 0.16em;
  background: linear-gradient(135deg, var(--xy-gold) 0%, var(--xy-cream) 80%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--xy-gold);
  transition: filter 0.3s ease;
}

.xy-brand:hover .xy-brand__name {
  filter: brightness(1.08);
}

.xy-nav-toggle {
  display: none;
}

.xy-nav {
  margin-top: 32px;
  flex: 1;
}

.xy-nav__list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.xy-nav__link {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  font-size: 16px;
  letter-spacing: 0.12em;
  font-weight: 400;
  color: var(--xy-mist);
  border-left: 3px solid transparent;
  transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease, padding-left 0.25s var(--xy-ease);
  position: relative;
}

.xy-nav__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 22px;
  height: 1px;
  background: var(--xy-gold);
  opacity: 0;
  transform: translateX(-12px);
  transition: opacity 0.25s ease, transform 0.25s var(--xy-ease);
}

.xy-nav__link:hover,
.xy-nav__link:focus-visible {
  color: var(--xy-cream);
  background: rgba(60, 42, 109, 0.28);
  padding-left: 22px;
}

.xy-nav__link:hover::before,
.xy-nav__link:focus-visible::before {
  opacity: 1;
  transform: translateX(0);
}

.xy-nav__link[aria-current="page"] {
  color: var(--xy-gold);
  border-left-color: var(--xy-gold);
  background: linear-gradient(90deg, rgba(212, 175, 55, 0.12), transparent);
  font-weight: 700;
}

.xy-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  right: 14px;
  top: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--xy-gold);
  transform: translateY(-50%);
  box-shadow: 0 0 10px var(--xy-gold);
}

.xy-header__dock {
  padding: 20px 12px 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.xy-dock__clover {
  display: block;
  width: 34px;
  height: 34px;
  position: relative;
  opacity: 0.5;
}

.xy-dock__clover::before,
.xy-dock__clover::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: transparent;
}

.xy-dock__clover::before {
  border: 1px solid var(--xy-gold);
  transform: translate(-50%, -50%);
}

.xy-dock__clover::after {
  border: 1px solid var(--xy-gold-dark);
  transform: translate(-50%, -50%) rotate(30deg) scale(0.7);
}

.xy-dock__line {
  width: 64px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--xy-gold-dark), transparent);
}

.xy-dock__text {
  font-size: 10px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--xy-gold-dark);
  writing-mode: vertical-rl;
}

/* ---------- Footer ---------- */
.xy-footer {
  margin-left: var(--xy-header-w);
  margin-top: 80px;
  background: linear-gradient(180deg, var(--xy-purple-deep) 0%, var(--xy-purple) 100%);
  border-top: 1px solid rgba(212, 175, 55, 0.2);
  position: relative;
}

.xy-footer::before {
  content: "";
  position: absolute;
  top: -18px;
  right: 8%;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(212, 175, 55, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.xy-footer__inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 48px 48px 28px;
}

.xy-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.6fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(154, 141, 184, 0.18);
}

.xy-footer__brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.xy-footer__brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--xy-gold), var(--xy-gold-dark));
  transform: rotate(45deg);
  border-radius: 6px;
  color: var(--xy-ink);
  font-family: var(--xy-sans-display);
  font-size: 18px;
  font-weight: 900;
  flex: 0 0 auto;
  transition: transform 0.3s var(--xy-ease);
}

.xy-footer__brand-lockup:hover .xy-footer__brand-mark {
  transform: rotate(225deg);
}

.xy-footer__brand-mark::first-letter {
  display: inline-block;
  transform: rotate(-45deg);
}

.xy-footer__brand-name {
  font-family: var(--xy-sans-display);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: 0.12em;
  color: var(--xy-gold);
}

.xy-footer__tagline {
  font-family: var(--xy-serif);
  font-style: italic;
  font-size: 14px;
  color: var(--xy-mist);
  margin-top: 8px;
}

.xy-footer__title {
  font-family: var(--xy-sans-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--xy-gold);
  margin-bottom: 18px;
}

.xy-footer__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.xy-footer__link {
  font-size: 15px;
  color: var(--xy-cream);
  opacity: 0.72;
  transition: opacity 0.2s, color 0.2s, padding-left 0.25s;
}

.xy-footer__link::before {
  content: "◆";
  display: inline-block;
  color: var(--xy-gold);
  font-size: 8px;
  margin-right: 8px;
  vertical-align: middle;
  opacity: 0.8;
}

.xy-footer__link:hover,
.xy-footer__link:focus-visible {
  opacity: 1;
  color: var(--xy-gold);
  padding-left: 4px;
}

.xy-footer__line {
  font-size: 14px;
  color: var(--xy-mist);
  margin-bottom: 4px;
}

.xy-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-top: 22px;
  font-size: 12px;
  color: var(--xy-mist);
}

.xy-footer__note {
  font-size: 12px;
  color: var(--xy-mist);
  opacity: 0.66;
}

/* ---------- Shared Page Primitives ---------- */
.xy-section {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 44px;
  width: 100%;
}

.xy-section--narrow {
  max-width: 820px;
}

.xy-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 24px;
}

.xy-card {
  background: linear-gradient(145deg, var(--xy-purple-soft) 0%, var(--xy-purple-deep) 100%);
  border: 1px solid rgba(212, 175, 55, 0.2);
  border-radius: var(--xy-radius);
  padding: 28px 26px;
  box-shadow: var(--xy-shadow);
  position: relative;
  overflow: hidden;
}

.xy-card::after {
  content: "";
  position: absolute;
  right: -32px;
  top: -32px;
  width: 90px;
  height: 90px;
  border: 1px solid rgba(212, 175, 55, 0.18);
  border-radius: 45%;
  transform: rotate(30deg);
  pointer-events: none;
}

.xy-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border: 1px solid var(--xy-gold-dark);
  color: var(--xy-gold);
  border-radius: 30px;
  background: rgba(212, 175, 55, 0.1);
}

.xy-chip--hot {
  border-color: var(--xy-orange);
  color: var(--xy-orange);
  background: rgba(255, 107, 53, 0.12);
}

.xy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--xy-sans-display);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.08em;
  padding: 12px 24px;
  border-radius: var(--xy-radius);
  border: 1px solid transparent;
  transition: transform 0.25s var(--xy-ease), box-shadow 0.25s ease, background 0.2s;
  will-change: transform;
}

.xy-btn:hover,
.xy-btn:focus-visible {
  transform: scale(1.04);
}

.xy-btn--gold {
  background: linear-gradient(135deg, var(--xy-gold), var(--xy-gold-dark));
  color: var(--xy-ink);
  box-shadow: 0 6px 20px rgba(212, 175, 55, 0.22);
}

.xy-btn--gold:hover,
.xy-btn--gold:focus-visible {
  box-shadow: 0 10px 28px rgba(212, 175, 55, 0.36);
  background: linear-gradient(135deg, var(--xy-gold-dark), var(--xy-gold));
}

.xy-btn--orange {
  background: var(--xy-orange);
  color: var(--xy-white);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.3);
}

.xy-btn--orange:hover,
.xy-btn--orange:focus-visible {
  background: var(--xy-orange-dark);
  box-shadow: 0 10px 26px rgba(224, 78, 26, 0.4);
}

.xy-panel {
  position: relative;
  border-radius: var(--xy-radius);
  padding: 40px;
  background:
    radial-gradient(circle at 12% 20%, rgba(255, 107, 53, 0.14) 0%, transparent 55%),
    radial-gradient(circle at 88% 85%, rgba(212, 175, 55, 0.16) 0%, transparent 48%),
    linear-gradient(135deg, var(--xy-purple-deep) 0%, var(--xy-purple-soft) 100%);
  border: 1px solid rgba(212, 175, 55, 0.2);
  overflow: hidden;
}

.xy-kicker {
  display: block;
  font-size: 12px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--xy-gold-dark);
  margin-bottom: 10px;
}

.xy-title {
  font-family: var(--xy-sans-display);
  font-size: 48px;
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--xy-ink);
  font-weight: 900;
}

.xy-footer .xy-title,
.xy-card .xy-title {
  color: var(--xy-white);
}

.xy-lead {
  font-size: 18px;
  line-height: 1.9;
  color: var(--xy-mist);
  max-width: 68ch;
}

.xy-rule {
  display: block;
  height: 1px;
  background: linear-gradient(90deg, var(--xy-gold) 0%, transparent 70%);
  border: 0;
  margin: 24px 0;
}

.xy-rule--center {
  background: linear-gradient(90deg, transparent, var(--xy-gold-dark), transparent);
}

/* ---------- Decor symbols ---------- */
.xy-dice {
  display: inline-block;
  width: 26px;
  height: 26px;
  background:
    radial-gradient(circle at 30% 30%, var(--xy-ink) 0 2px, transparent 2.5px),
    radial-gradient(circle at 70% 70%, var(--xy-ink) 0 2px, transparent 2.5px),
    radial-gradient(circle at 70% 30%, var(--xy-ink) 0 2px, transparent 2.5px),
    radial-gradient(circle at 30% 70%, var(--xy-ink) 0 2px, transparent 2.5px),
    linear-gradient(135deg, var(--xy-gold), var(--xy-gold-dark));
  border-radius: 5px;
  opacity: 0.6;
  transform: rotate(-8deg);
}

.xy-clover {
  display: inline-block;
  width: 34px;
  height: 34px;
  position: relative;
  border: 1px solid var(--xy-gold);
  border-radius: 50%;
  opacity: 0.6;
}

.xy-clover::before,
.xy-clover::after {
  content: "";
  position: absolute;
  inset: 6px;
  border: 1px solid var(--xy-gold-dark);
  border-radius: 50%;
}

.xy-clover::after {
  inset: 12px;
  border-color: var(--xy-gold);
  background: var(--xy-gold-dark);
  opacity: 0.4;
}

.xy-clover--light {
  border-color: rgba(212, 175, 55, 0.4);
}

.xy-rays {
  display: inline-block;
  width: 64px;
  height: 64px;
  background:
    repeating-conic-gradient(from 0deg, var(--xy-gold) 0deg 5deg, transparent 5deg 14deg);
  -webkit-mask-image: radial-gradient(circle, transparent 10%, #000 10%);
  mask-image: radial-gradient(circle, transparent 10%, #000 10%);
  opacity: 0.2;
  border-radius: 50%;
}

.xy-backtop {
  position: fixed;
  right: 30px;
  bottom: 30px;
  z-index: 980;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--xy-gold) 0%, var(--xy-gold-dark) 100%);
  color: var(--xy-ink);
  border: 1px solid var(--xy-gold);
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(16px) scale(0.8);
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s var(--xy-ease);
  box-shadow: 0 8px 24px rgba(212, 175, 55, 0.25);
}

.xy-backtop::before {
  content: "↑";
  line-height: 1;
}

.xy-backtop[data-visible="true"] {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  :root {
    --xy-header-w: 220px;
  }

  .xy-header__inner {
    padding: 20px 16px;
  }

  .xy-title {
    font-size: 40px;
  }

  .xy-grid {
    gap: 18px;
  }

  .xy-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

  .xy-footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  :root {
    --xy-header-w: 68px;
  }

  .xy-header {
    width: var(--xy-header-w);
  }

  .xy-header__inner {
    padding: 16px 10px;
  }

  .xy-brand {
    justify-content: center;
  }

  .xy-brand__mark {
    width: 36px;
    height: 36px;
    font-size: 18px;
    transform: rotate(45deg);
  }

  .xy-brand:hover .xy-brand__mark {
    transform: rotate(225deg);
  }

  .xy-brand__name,
  .xy-dock__text,
  .xy-dock__line,
  .xy-dock__clover,
  .xy-nav__link span,
  .xy-nav__link::before,
  .xy-nav__link::after {
    display: none;
  }

  .xy-nav__link {
    font-size: 18px;
    padding: 10px 0;
    justify-content: center;
    border-left: 0;
    border-bottom: 1px solid rgba(212, 175, 55, 0.1);
  }

  .xy-nav__link::before {
    content: "◆";
    display: inline-block;
    position: static;
    width: auto;
    height: auto;
    opacity: 1;
    transform: none;
    font-size: 10px;
    margin-right: 6px;
  }

  .xy-nav__link:hover,
  .xy-nav__link:focus-visible {
    padding-left: 0;
  }

  .xy-footer {
    margin-left: var(--xy-header-w);
    margin-top: 56px;
  }

  .xy-footer__inner {
    padding: 36px 24px 24px;
  }

  .xy-footer__grid {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .xy-footer__brand {
    grid-column: auto;
  }

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

  .xy-section {
    padding: 0 24px;
  }

  .xy-title {
    font-size: 32px;
  }
}

@media (max-width: 560px) {
  :root {
    --xy-header-w: 56px;
  }

  .xy-header__inner {
    padding: 10px 6px;
  }

  .xy-brand__mark {
    width: 30px;
    height: 30px;
    font-size: 15px;
  }

  .xy-nav {
    margin-top: 20px;
  }

  .xy-nav__link {
    font-size: 15px;
    padding: 12px 0;
  }

  .xy-footer {
    margin-left: 0;
    padding-top: 8px;
  }

  .xy-footer::before {
    display: none;
  }

  .xy-footer__inner {
    padding: 28px 20px 20px;
  }

  .xy-section {
    padding: 0 18px;
  }

  .xy-title {
    font-size: 28px;
  }

  .xy-backtop {
    right: 16px;
    bottom: 16px;
    width: 40px;
    height: 40px;
    font-size: 18px;
  }
}

/* ---------- Reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s var(--xy-ease), transform 0.55s var(--xy-ease);
  transition-delay: var(--reveal-delay, 0ms);
}

[data-reveal="in"] {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal="in"]:hover {
  transform: translateY(-2px);
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

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

  .xy-btn:hover .xy-btn:focus-visible {
    transform: none;
  }
}

/* ---------- Desktop nav toggle hidden ---------- */
@media (min-width: 769px) {
  .xy-nav-toggle {
    display: none;
  }
}

/* ---------- Mobile off-canvas drawer ---------- */
@media (max-width: 768px) {
  .xy-nav-toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    width: 34px;
    height: 44px;
    justify-content: center;
    background: transparent;
    color: var(--xy-gold);
  }

  .xy-header__top {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 4px;
  }

  .xy-nav-toggle__icon {
    display: block;
    width: 22px;
    height: 2px;
    background: linear-gradient(90deg, var(--xy-gold), var(--xy-orange));
    border-radius: 1px;
    position: relative;
    transition: transform 0.3s var(--xy-ease), opacity 0.2s;
  }

  .xy-nav-toggle__icon::before,
  .xy-nav-toggle__icon::after {
    content: "";
    display: block;
    position: absolute;
    left: 0;
    width: 22px;
    height: 2px;
    background: linear-gradient(90deg, var(--xy-gold), var(--xy-orange));
    border-radius: 1px;
    transition: transform 0.3s var(--xy-ease), top 0.3s var(--xy-ease);
  }

  .xy-nav-toggle__icon {
    top: 0;
  }

  .xy-nav-toggle__icon::before {
    top: -7px;
  }

  .xy-nav-toggle__icon::after {
    top: 7px;
  }

  .xy-nav-toggle__text {
    font-size: 10px;
    letter-spacing: 0.08em;
    color: var(--xy-mist);
  }

  .xy-nav-toggle[aria-expanded="true"] .xy-nav-toggle__icon {
    background: transparent;
  }

  .xy-nav-toggle[aria-expanded="true"] .xy-nav-toggle__icon::before {
    top: 0;
    transform: rotate(45deg);
  }

  .xy-nav-toggle[aria-expanded="true"] .xy-nav-toggle__icon::after {
    top: 0;
    transform: rotate(-45deg);
  }

  .xy-nav {
    margin-top: 12px;
    position: fixed;
    top: 0;
    left: var(--xy-header-w);
    bottom: 0;
    width: 240px;
    background: var(--xy-ink);
    border-left: 1px solid rgba(212, 175, 55, 0.28);
    padding: 80px 20px 20px;
    z-index: 1100;
    transform: translateX(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s var(--xy-ease), opacity 0.3s ease;
    box-shadow: -20px 0 40px rgba(0, 0, 0, 0.25);
    overflow-y: auto;
  }

  .xy-nav[data-open="true"] {
    transform: translateX(0);
    opacity: 1;
    pointer-events: auto;
  }

  .xy-nav__list {
    gap: 6px;
  }

  .xy-nav__link {
    justify-content: flex-start;
    padding: 12px 14px;
    font-size: 16px;
    border-bottom: 0;
    border-left: 3px solid transparent;
  }

  .xy-nav__link::before {
    display: none;
  }

  .xy-nav__link:hover,
  .xy-nav__link:focus-visible {
    padding-left: 18px;
  }

  .xy-nav__link[aria-current="page"] {
    border-left-color: var(--xy-gold);
    background: linear-gradient(90deg, rgba(212, 175, 55, 0.14), transparent);
  }

  .xy-header__dock {
    display: none;
  }

  .xy-brand__name,
  .xy-dock__text,
  .xy-dock__line,
  .xy-dock__clover {
    display: flex;
  }

  .xy-brand__name {
    display: inline-block;
    font-size: 18px;
    line-height: 1.2;
  }

  @media (max-width: 480px) {
    .xy-brand__name {
      display: none;
    }
  }
}

@media (max-width: 768px) {
  .xy-nav[data-open="true"] + .xy-header__dock {
    display: none;
  }
}

@media (min-width: 769px) {
  .xy-nav__link[aria-current="page"] {
    border-left-color: var(--xy-gold);
  }
}

/* 移动端隐藏部分品牌文本，保留图标 */
@media (max-width: 768px) {
  .xy-brand {
    flex-direction: row;
  }

  .xy-brand__name {
    display: none;
  }

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

/* 覆盖窄屏时页脚不缩窄 */
@media (max-width: 560px) {
  .xy-footer {
    margin-left: 0;
  }
}

/* 悬停位移：导航hover */
.xy-nav__link:hover,
.xy-nav__link:focus-visible {
  transform: translateY(-1px);
}

/* 滚动渐显和内容节奏 */
@media (min-width: 768px) {
  .xy-section + .xy-section,
  section + section {
    margin-top: 48px;
  }
}

/* 键盘无障碍 */
.xy-nav-toggle:focus-visible {
  outline: 2px solid var(--xy-gold);
  outline-offset: 2px;
}

.xy-backtop:focus-visible {
  outline: 2px solid var(--xy-orange);
  outline-offset: 3px;
}