/* ==========================================================================
   银河澳门指南 · /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   ========================================================================== */

/* ---------- 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 { margin: 0; }

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

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

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

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

[hidden] { display: none !important; }

:focus:not(:focus-visible) { outline: none; }

:focus-visible {
  outline: 2px solid var(--gxy-cyan);
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- 2. 变量 ---------- */
:root {
  --gxy-bg: #070B14;
  --gxy-bg-2: #0B1020;
  --gxy-panel: #121A2E;
  --gxy-ink: #D8E1F0;
  --gxy-muted: #A9B4C8;
  --gxy-line: #5B6B8C;
  --gxy-cyan: #3DE1FF;
  --gxy-gold: #F6C86A;
  --gxy-coral: #FF6B6B;
  --gxy-green: #55D6A6;

  --gxy-w: 1280px;
  --gxy-pad: clamp(16px, 4vw, 40px);
  --gxy-gap: clamp(16px, 3vw, 28px);
  --gxy-radius: 2px;
  --gxy-line-soft: rgba(91, 107, 140, 0.32);

  --gxy-font-display: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --gxy-font-body: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  --gxy-font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Noto Sans Mono", "Courier New", monospace;
}

/* ---------- 3. 基础页面 ---------- */
body {
  min-height: 100vh;
  font-family: var(--gxy-font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--gxy-ink);
  background-color: var(--gxy-bg);
  background-image:
    radial-gradient(1100px 720px at 10% -12%, rgba(61, 225, 255, 0.10), transparent 62%),
    radial-gradient(900px 640px at 98% -2%, rgba(246, 200, 106, 0.07), transparent 58%),
    radial-gradient(1000px 800px at 50% 112%, rgba(255, 107, 107, 0.05), transparent 60%),
    linear-gradient(rgba(91, 107, 140, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 107, 140, 0.045) 1px, transparent 1px);
  background-size: auto, auto, auto, 100% 108px, 108px 100%;
  background-repeat: no-repeat, no-repeat, no-repeat, repeat, repeat;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- 4. 排版组件 ---------- */
.gxy-title {
  font-family: var(--gxy-font-display);
  font-weight: 800;
  font-size: clamp(32px, 5vw, 72px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--gxy-ink);
}

.gxy-title--xl { font-size: clamp(40px, 7vw, 112px); line-height: 1; }

.gxy-title--sm {
  font-size: clamp(22px, 2.6vw, 32px);
  line-height: 1.28;
  letter-spacing: -0.01em;
}

.gxy-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--gxy-font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gxy-cyan);
}

.gxy-eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}

.gxy-lead {
  max-width: 34em;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.9;
  color: var(--gxy-muted);
}

.gxy-mono {
  font-family: var(--gxy-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gxy-muted);
}

.gxy-mono--gold { color: var(--gxy-gold); }
.gxy-mono--cyan { color: var(--gxy-cyan); }

/* ---------- 5. 容器与节奏 ---------- */
.gxy-shell {
  width: 100%;
  max-width: var(--gxy-w);
  margin-inline: auto;
  padding-inline: var(--gxy-pad);
}

.gxy-section { padding-block: clamp(36px, 6vw, 80px); }

/* ---------- 6. 按钮 ---------- */
.gxy-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 44px;
  padding: 11px 18px;
  font-family: var(--gxy-font-body);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--gxy-ink);
  background: rgba(18, 26, 46, 0.9);
  border: 1px solid var(--gxy-line-soft);
  border-radius: var(--gxy-radius);
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.gxy-btn::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--gxy-line);
  transform: rotate(45deg);
  transition: background-color 0.2s ease;
}

.gxy-btn:hover {
  background: rgba(30, 42, 68, 0.95);
  border-color: var(--gxy-line);
}

.gxy-btn--gold {
  color: var(--gxy-gold);
  background: rgba(246, 200, 106, 0.08);
  border-color: rgba(246, 200, 106, 0.6);
}

.gxy-btn--gold::before { background: var(--gxy-gold); }

.gxy-btn--gold:hover {
  color: #0B1020;
  background: var(--gxy-gold);
  border-color: var(--gxy-gold);
  box-shadow: 0 0 24px rgba(246, 200, 106, 0.35);
}

.gxy-btn--gold:hover::before { background: #0B1020; }

.gxy-btn--cyan {
  color: var(--gxy-cyan);
  background: rgba(61, 225, 255, 0.07);
  border-color: rgba(61, 225, 255, 0.5);
}

.gxy-btn--cyan::before { background: var(--gxy-cyan); }

.gxy-btn--cyan:hover {
  color: #06101A;
  background: var(--gxy-cyan);
  border-color: var(--gxy-cyan);
  box-shadow: 0 0 24px rgba(61, 225, 255, 0.35);
}

.gxy-btn--cyan:hover::before { background: #06101A; }

.gxy-btn--ghost {
  color: var(--gxy-muted);
  background: transparent;
  border-color: rgba(91, 107, 140, 0.45);
}

.gxy-btn--ghost:hover {
  color: var(--gxy-ink);
  border-color: var(--gxy-cyan);
}

.gxy-btn--ghost:hover::before { background: var(--gxy-cyan); }

/* ---------- 7. 标签 ---------- */
.gxy-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  font-family: var(--gxy-font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gxy-muted);
  border: 1px solid var(--gxy-line-soft);
  border-radius: 999px;
}

.gxy-tag::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 8px currentColor;
}

.gxy-tag--cyan { color: var(--gxy-cyan); border-color: rgba(61, 225, 255, 0.42); }
.gxy-tag--gold { color: var(--gxy-gold); border-color: rgba(246, 200, 106, 0.42); }
.gxy-tag--coral { color: var(--gxy-coral); border-color: rgba(255, 107, 107, 0.42); }
.gxy-tag--green { color: var(--gxy-green); border-color: rgba(85, 214, 166, 0.42); }

/* ---------- 8. 切角面板 ---------- */
.gxy-cut {
  position: relative;
  isolation: isolate;
}

.gxy-cut::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border: 1px solid transparent;
  background:
    linear-gradient(160deg, rgba(18, 26, 46, 0.97), rgba(9, 14, 26, 0.97)) padding-box,
    linear-gradient(150deg, rgba(61, 225, 255, 0.42), rgba(91, 107, 140, 0.28) 44%, rgba(246, 200, 106, 0.32)) border-box;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
}

.gxy-panel {
  position: relative;
  padding: clamp(18px, 2.6vw, 28px);
}

/* ---------- 9. 网格 ---------- */
.gxy-grid { display: grid; gap: var(--gxy-gap); }

.gxy-grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.gxy-grid--3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

@media (min-width: 900px) {
  .gxy-grid--offset > *:nth-child(3n + 2) { margin-top: 36px; }
  .gxy-grid--offset > *:nth-child(3n + 3) { margin-top: 10px; }
}

/* ---------- 10. 图片容器 ---------- */
.gxy-media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--gxy-line-soft);
  background-color: #0A1020;
  background-image:
    radial-gradient(120% 90% at 20% 10%, rgba(61, 225, 255, 0.18), transparent 55%),
    radial-gradient(90% 80% at 85% 90%, rgba(246, 200, 106, 0.14), transparent 60%),
    linear-gradient(rgba(91, 107, 140, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 107, 140, 0.14) 1px, transparent 1px);
  background-size: auto, auto, 28px 28px, 28px 28px;
}

.gxy-media img { width: 100%; height: 100%; object-fit: cover; }

.gxy-media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 12px;
  font-family: var(--gxy-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gxy-ink);
  background: linear-gradient(180deg, transparent, rgba(7, 11, 20, 0.92));
}

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

/* ---------- 11. 路径与节点 ---------- */
.gxy-rail-line {
  position: relative;
  padding-left: 26px;
}

.gxy-rail-line::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0.6em;
  bottom: 0.6em;
  width: 1px;
  background: linear-gradient(180deg, rgba(61, 225, 255, 0.75), rgba(91, 107, 140, 0.35) 55%, rgba(246, 200, 106, 0.55));
}

.gxy-node {
  position: relative;
  padding-left: 22px;
}

.gxy-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid var(--gxy-cyan);
  background: rgba(61, 225, 255, 0.25);
  box-shadow: 0 0 12px rgba(61, 225, 255, 0.5);
}

/* ---------- 12. 筛选 ---------- */
.gxy-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.gxy-filter__btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 40px;
  padding: 8px 14px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--gxy-muted);
  background: rgba(18, 26, 46, 0.7);
  border: 1px solid var(--gxy-line-soft);
  border-radius: 999px;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.gxy-filter__btn:hover {
  color: var(--gxy-ink);
  border-color: rgba(61, 225, 255, 0.5);
}

.gxy-filter__btn[aria-pressed="true"] {
  color: #06101A;
  font-weight: 700;
  background: var(--gxy-cyan);
  border-color: var(--gxy-cyan);
  box-shadow: 0 0 22px rgba(61, 225, 255, 0.35);
}

/* ---------- 13. 版本对照 ---------- */
.gxy-compare {
  display: grid;
  gap: 1px;
  overflow: hidden;
  background: var(--gxy-line-soft);
  border: 1px solid var(--gxy-line-soft);
  border-radius: var(--gxy-radius);
}

@media (min-width: 760px) {
  .gxy-compare { grid-template-columns: 1fr 1fr; }
}

.gxy-compare__side {
  padding: clamp(14px, 2vw, 20px);
  background: rgba(9, 14, 26, 0.96);
}

.gxy-compare__side--new {
  background: linear-gradient(180deg, rgba(246, 200, 106, 0.10), rgba(9, 14, 26, 0.96) 58%);
}

.gxy-compare__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
  font-family: var(--gxy-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gxy-muted);
}

.gxy-compare__list { display: grid; gap: 8px; }

.gxy-compare__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gxy-muted);
}

.gxy-compare__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 7px;
  height: 1px;
  background: var(--gxy-line);
}

/* ---------- 14. 问答折叠 ---------- */
.gxy-faq { display: grid; gap: 10px; }

.gxy-faq__item {
  background: rgba(11, 16, 32, 0.8);
  border: 1px solid var(--gxy-line-soft);
  border-radius: var(--gxy-radius);
}

.gxy-faq__item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  font-weight: 600;
  color: var(--gxy-ink);
  cursor: pointer;
  list-style: none;
}

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

.gxy-faq__item summary::after {
  content: "+";
  font-family: var(--gxy-font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--gxy-cyan);
}

.gxy-faq__item[open] summary { color: var(--gxy-cyan); }
.gxy-faq__item[open] summary::after { content: "–"; }

.gxy-faq__body {
  max-width: 38em;
  padding: 0 16px 16px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--gxy-muted);
}

/* ---------- 15. 面包屑 ---------- */
.gxy-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--gxy-font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gxy-line);
}

.gxy-breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(91, 107, 140, 0.6);
}

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

/* ---------- 16. 正文块 ---------- */
.gxy-prose { max-width: 38em; }

.gxy-prose p {
  margin: 0 0 1.1em;
  line-height: 1.9;
  color: var(--gxy-muted);
}

.gxy-prose h2 {
  font-family: var(--gxy-font-display);
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.3;
  margin: 1.6em 0 0.6em;
  color: var(--gxy-ink);
}

.gxy-prose h3 {
  font-size: 18px;
  margin: 1.4em 0 0.5em;
  color: var(--gxy-ink);
}

.gxy-prose a {
  color: var(--gxy-cyan);
  text-decoration: underline;
  text-decoration-color: rgba(61, 225, 255, 0.4);
  text-underline-offset: 3px;
}

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

.gxy-prose ul { list-style: disc; padding-left: 1.35em; margin: 0 0 1.1em; }
.gxy-prose ol { list-style: decimal; padding-left: 1.35em; margin: 0 0 1.1em; }
.gxy-prose li { margin: 0.35em 0; color: var(--gxy-muted); }

/* ---------- 17. 跳过链接 ---------- */
.gxy-skip {
  position: absolute;
  left: 12px;
  top: -120px;
  z-index: 200;
  padding: 10px 16px;
  font-weight: 700;
  color: #06101A;
  background: var(--gxy-cyan);
  border-radius: var(--gxy-radius);
  transition: top 0.2s ease;
}

.gxy-skip:focus { top: 12px; }

/* ---------- 18. 页头 ---------- */
.gxy-header {
  position: sticky;
  top: 0;
  z-index: 60;
  color: var(--gxy-ink);
  background: rgba(7, 11, 20, 0.9);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  backdrop-filter: blur(14px) saturate(120%);
  border-bottom: 1px solid rgba(91, 107, 140, 0.28);
  transition: box-shadow 0.25s ease, background-color 0.25s ease;
}

.gxy-header.is-scrolled {
  background: rgba(7, 11, 20, 0.97);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.5);
}

.gxy-header__grid {
  display: grid;
  grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
  gap: clamp(16px, 3vw, 36px);
  align-items: center;
  width: 100%;
  max-width: var(--gxy-w);
  margin-inline: auto;
  padding: 14px var(--gxy-pad);
}

/* 品牌轨道 */
.gxy-rail {
  position: relative;
  padding-left: 18px;
  border-left: 1px solid rgba(61, 225, 255, 0.35);
}

.gxy-rail::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 8px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gxy-cyan);
  animation: gxy-pulse 4s ease-in-out infinite;
}

@keyframes gxy-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(61, 225, 255, 0.12), 0 0 12px rgba(61, 225, 255, 0.55); }
  50% { box-shadow: 0 0 0 6px rgba(61, 225, 255, 0.05), 0 0 20px rgba(61, 225, 255, 0.85); }
}

.gxy-brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  color: var(--gxy-ink);
}

.gxy-brand__name {
  font-family: var(--gxy-font-display);
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.2;
}

.gxy-brand__sub {
  font-family: var(--gxy-font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--gxy-line);
}

.gxy-rail__meta {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 6px;
}

.gxy-rail__dot {
  width: 16px;
  height: 1px;
  background: var(--gxy-line);
}

/* 导航 */
.gxy-navwrap {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 14px;
  padding-left: clamp(12px, 2vw, 28px);
  border-left: 1px solid rgba(91, 107, 140, 0.22);
}

.gxy-nav { min-width: 0; }

.gxy-nav__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 3px;
}

.gxy-nav__item { display: block; }

.gxy-nav__link {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 10px;
  font-size: 13.5px;
  letter-spacing: 0.02em;
  color: var(--gxy-muted);
  border: 1px solid transparent;
  border-radius: var(--gxy-radius);
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.gxy-nav__link:hover,
.gxy-nav__link:focus-visible {
  color: var(--gxy-ink);
  background: rgba(18, 26, 46, 0.8);
  border-color: rgba(91, 107, 140, 0.5);
}

.gxy-nav__idx {
  font-family: var(--gxy-font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--gxy-line);
}

.gxy-nav__link[aria-current="page"] {
  color: #06101A;
  font-weight: 700;
  background: var(--gxy-cyan);
  border-color: var(--gxy-cyan);
  box-shadow: 0 0 20px rgba(61, 225, 255, 0.28);
}

.gxy-nav__link[aria-current="page"] .gxy-nav__idx { color: rgba(7, 11, 20, 0.65); }

/* 折叠按钮 */
.gxy-navtoggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gxy-ink);
  background: rgba(18, 26, 46, 0.9);
  border: 1px solid rgba(91, 107, 140, 0.5);
  border-radius: var(--gxy-radius);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.gxy-navtoggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.gxy-navtoggle__bars i {
  display: block;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.gxy-navtoggle[aria-expanded="true"] {
  color: var(--gxy-cyan);
  border-color: var(--gxy-cyan);
}

.gxy-navtoggle[aria-expanded="true"] .gxy-navtoggle__bars i:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.gxy-navtoggle[aria-expanded="true"] .gxy-navtoggle__bars i:nth-child(2) { opacity: 0; }
.gxy-navtoggle[aria-expanded="true"] .gxy-navtoggle__bars i:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }

/* 回退行 */
.gxy-returnbar {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  width: 100%;
  max-width: var(--gxy-w);
  margin-inline: auto;
  padding: 0 var(--gxy-pad) 12px;
}

.gxy-returnbar .gxy-btn { min-height: 38px; padding: 8px 14px; font-size: 13px; }

.gxy-returnbar__hint {
  font-family: var(--gxy-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gxy-line);
}

/* 滚动进度 */
.gxy-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  overflow: hidden;
  background: rgba(91, 107, 140, 0.22);
}

.gxy-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--gxy-cyan), var(--gxy-gold));
  box-shadow: 0 0 12px rgba(61, 225, 255, 0.5);
}

/* ---------- 19. 页脚 ---------- */
.gxy-footer {
  position: relative;
  margin-top: clamp(48px, 7vw, 96px);
  color: var(--gxy-muted);
  background: linear-gradient(180deg, #0B1020 0%, #070B14 78%);
  border-top: 1px solid rgba(91, 107, 140, 0.28);
}

.gxy-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(61, 225, 255, 0.6), rgba(246, 200, 106, 0.5), transparent);
}

.gxy-footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr 1fr;
  gap: clamp(22px, 4vw, 44px);
  padding-block: clamp(34px, 5vw, 60px) clamp(24px, 3vw, 36px);
}

.gxy-footer__col { min-width: 0; }

.gxy-footer__col--brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.gxy-footer__brand {
  font-family: var(--gxy-font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--gxy-ink);
}

.gxy-footer__brand:hover { color: var(--gxy-cyan); }

.gxy-footer__title {
  margin: 0 0 12px;
  font-family: var(--gxy-font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gxy-cyan);
}

.gxy-footer__list {
  display: grid;
  gap: 9px;
  margin-bottom: 14px;
}

.gxy-footer__list a {
  font-size: 14px;
  color: var(--gxy-muted);
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.gxy-footer__list a:hover {
  color: var(--gxy-ink);
  border-bottom-color: var(--gxy-cyan);
}

.gxy-footer__contact {
  font-size: 13.5px;
  line-height: 2;
  color: var(--gxy-muted);
  word-break: break-word;
}

.gxy-footer__contact .gxy-mono {
  display: inline-block;
  min-width: 46px;
  color: var(--gxy-line);
}

.gxy-footer__note {
  font-size: 13px;
  line-height: 1.8;
  color: var(--gxy-line);
  max-width: 32em;
}

.gxy-footer__base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 16px 26px;
  border-top: 1px solid rgba(91, 107, 140, 0.22);
}

.gxy-footer__base .gxy-mono { color: var(--gxy-line); }

/* ---------- 20. 显现动画 ---------- */
.gxy-js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.7, 0.3, 1);
}

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

/* ---------- 21. 响应式 ---------- */
@media (max-width: 1200px) {
  .gxy-nav__idx { display: none; }
}

@media (max-width: 980px) {
  .gxy-header__grid {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px;
    padding-block: 11px;
  }

  .gxy-navwrap {
    padding-left: 0;
    border-left: 0;
  }

  .gxy-navtoggle { display: inline-flex; }

  .gxy-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    padding: 10px var(--gxy-pad) 18px;
    background: rgba(9, 14, 26, 0.98);
    border-bottom: 1px solid rgba(91, 107, 140, 0.32);
    box-shadow: 0 26px 44px rgba(0, 0, 0, 0.55);
  }

  .gxy-nav[data-open="true"] { display: block; }

  .gxy-nav__list {
    flex-direction: column;
    justify-content: flex-start;
    gap: 2px;
  }

  .gxy-nav__link {
    width: 100%;
    padding: 12px 12px;
    font-size: 15px;
  }

  .gxy-nav__idx { display: inline; }

  .gxy-footer__grid { grid-template-columns: 1fr 1fr; }

  .gxy-footer__col--brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .gxy-returnbar__hint { display: none; }

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

  .gxy-footer__base { flex-direction: column; align-items: flex-start; }

  .gxy-rail { padding-left: 14px; }

  .gxy-brand__sub { letter-spacing: 0.18em; }
}

/* ---------- 22. 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .gxy-rail::before { animation: none; box-shadow: 0 0 0 4px rgba(61, 225, 255, 0.14), 0 0 14px rgba(61, 225, 255, 0.7); }

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