/* =========================================================
   金游世界 · 共享站点样式 /assets/site.css
   夜航星图 × 高原湖泊叠影
   ========================================================= */

/* ---------- 1. 重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

ol, ul { list-style: none; }

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

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

a { color: inherit; }

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

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #07090D;
  --ink-deep: #080A0F;
  --panel: #10141C;
  --panel-hi: #121824;
  --line: #2C3442;
  --gold: #D6A545;
  --gold-soft: #F2D48A;
  --clay: #B65E3C;
  --lake: #6FB7B3;
  --paper: #F4EFE4;
  --slate: #A7AFBA;
  --jade: #2E6E67;

  --serif: 'Source Han Serif SC', 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  --sans: 'Source Han Sans SC', 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  --mono: 'JetBrains Mono', 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  --shell: 1280px;
  --gutter: clamp(16px, 4vw, 48px);
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 3. 中文排版与底色 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    linear-gradient(90deg, rgba(44, 52, 66, .30) 1px, transparent 1px),
    linear-gradient(180deg, rgba(44, 52, 66, .16) 1px, transparent 1px),
    radial-gradient(1100px 560px at 82% -6%, rgba(111, 183, 179, .10), transparent 70%),
    radial-gradient(820px 480px at 4% 2%, rgba(214, 165, 69, .07), transparent 72%);
  background-size: 96px 96px, 96px 96px, 100% 100%, 100% 100%;
  background-attachment: fixed;
  color: var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
}

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -.012em;
}

h1 { font-size: clamp(2.1rem, 5.4vw, 4rem); }
h2 { font-size: clamp(1.55rem, 3.2vw, 2.35rem); }
h3 { font-size: clamp(1.08rem, 1.8vw, 1.34rem); line-height: 1.42; }

h4 {
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .03em;
  line-height: 1.5;
}

strong { color: var(--paper); font-weight: 700; }
small { font-size: .8em; color: var(--slate); }

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

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

#main-content { scroll-margin-top: 104px; }

/* ---------- 4. 跳至正文 ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  padding: 10px 18px;
  background: var(--gold);
  color: var(--ink);
  font-weight: 700;
  font-size: .86rem;
  text-decoration: none;
  transform: translateY(-130%);
  transition: transform .2s var(--ease);
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline-offset: -2px;
}

/* ---------- 5. 滚动进度（JS 注入） ---------- */
.scroll-rail {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 120;
  pointer-events: none;
  background: rgba(44, 52, 66, .55);
}

.scroll-rail > span {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--clay), var(--gold) 58%, var(--gold-soft));
  box-shadow: 0 0 12px rgba(214, 165, 69, .55);
}

/* ---------- 6. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(7, 9, 13, .94);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(214, 165, 69, .55) 50%, transparent);
  pointer-events: none;
}

.header-grid {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px clamp(18px, 3vw, 44px);
  max-width: var(--shell);
  margin: 0 auto;
  padding: 12px var(--gutter);
}

/* 品牌块 */
.brand-block {
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 18px);
  min-width: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 4px 2px;
  text-decoration: none;
}

.brand-name {
  font-family: var(--serif);
  font-size: clamp(1.14rem, 1.6vw, 1.34rem);
  font-weight: 700;
  letter-spacing: .07em;
  color: var(--paper);
  white-space: nowrap;
}

.brand-mark:hover .brand-name,
.brand-mark:focus-visible .brand-name { color: var(--gold-soft); }

.brand-constellation {
  position: relative;
  display: inline-block;
  flex: none;
  width: 26px;
  height: 22px;
}

.brand-constellation i {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 6px rgba(214, 165, 69, .7);
}

.brand-constellation i:nth-child(1) { left: 0; top: 16px; background: var(--lake); box-shadow: 0 0 6px rgba(111, 183, 179, .7); }
.brand-constellation i:nth-child(2) { left: 11px; top: 7px; }
.brand-constellation i:nth-child(3) { left: 21px; top: 1px; background: var(--clay); box-shadow: 0 0 6px rgba(182, 94, 60, .7); }

.brand-constellation::before,
.brand-constellation::after {
  content: "";
  position: absolute;
  height: 1px;
  transform-origin: left center;
}

.brand-constellation::before {
  left: 2px;
  top: 17px;
  width: 12px;
  background: linear-gradient(90deg, var(--lake), var(--gold));
  transform: rotate(-38deg);
}

.brand-constellation::after {
  left: 13px;
  top: 8px;
  width: 12px;
  background: linear-gradient(90deg, var(--gold), var(--clay));
  transform: rotate(-30deg);
}

.brand-tagline {
  padding-left: clamp(10px, 1.6vw, 18px);
  border-left: 1px solid var(--line);
  font-family: var(--mono);
  font-size: .70rem;
  letter-spacing: .26em;
  color: var(--slate);
  white-space: nowrap;
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  margin-left: auto;
  padding: 10px 13px;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--paper);
  font-family: var(--mono);
  font-size: .70rem;
  letter-spacing: .18em;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible { border-color: var(--gold); color: var(--gold-soft); }

.nav-toggle-bar {
  position: relative;
  display: inline-block;
  width: 18px;
  height: 1px;
  background: currentColor;
  transition: background .2s var(--ease);
}

.nav-toggle-bar::before,
.nav-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1px;
  background: currentColor;
  transition: transform .22s var(--ease), background .2s var(--ease);
}

.nav-toggle-bar::before { top: -5px; }
.nav-toggle-bar::after { top: 5px; }

.site-header[data-open] .nav-toggle-bar { background: transparent; }
.site-header[data-open] .nav-toggle-bar::before { transform: translateY(5px) rotate(45deg); background: var(--gold); }
.site-header[data-open] .nav-toggle-bar::after { transform: translateY(-5px) rotate(-45deg); background: var(--gold); }

/* 星轨导航 */
.site-nav {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: clamp(6px, 1.2vw, 20px);
}

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

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

.nav-node + .nav-node::before {
  content: "";
  display: block;
  width: clamp(8px, 1.5vw, 24px);
  height: 1px;
  margin: 0 2px;
  background: linear-gradient(90deg, var(--line), rgba(214, 165, 69, .30));
}

.nav-node a {
  position: relative;
  display: inline-block;
  padding: 12px 6px 11px;
  font-size: .9rem;
  letter-spacing: .05em;
  color: var(--slate);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.nav-node a::before {
  content: "";
  position: absolute;
  top: 3px;
  left: 50%;
  width: 4px;
  height: 4px;
  margin-left: -2px;
  border-radius: 50%;
  background: var(--line);
  transition: background .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}

.nav-node a::after {
  content: "";
  position: absolute;
  left: 6px;
  right: 6px;
  bottom: 5px;
  height: 1px;
  background: var(--gold-soft);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .24s var(--ease);
}

.nav-node a:hover,
.nav-node a:focus-visible { color: var(--paper); }
.nav-node a:hover::before { background: var(--gold-soft); transform: scale(1.35); }
.nav-node a:hover::after,
.nav-node a:focus-visible::after { transform: scaleX(1); }

.nav-node a[aria-current="page"] { color: var(--paper); }

.nav-node a[aria-current="page"]::before {
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(214, 165, 69, .16), 0 0 10px rgba(214, 165, 69, .8);
  animation: node-pulse 3.6s ease-in-out infinite;
}

.nav-node a[aria-current="page"]::after {
  transform: scaleX(1);
  background: var(--gold);
}

@keyframes node-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(214, 165, 69, .14), 0 0 8px rgba(214, 165, 69, .55); }
  50%      { box-shadow: 0 0 0 5px rgba(214, 165, 69, .05), 0 0 15px rgba(214, 165, 69, .9); }
}

/* 鎏金 CTA */
.cta-gold {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 20px;
  background: var(--gold);
  border: 1px solid var(--gold);
  color: var(--ink);
  font-size: .86rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-decoration: none;
  white-space: nowrap;
  transition: background .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.cta-gold::after {
  content: "→";
  font-family: var(--mono);
  transition: transform .2s var(--ease);
}

.cta-gold:hover,
.cta-gold:focus-visible {
  background: var(--gold-soft);
  border-color: var(--gold-soft);
  box-shadow: 0 10px 26px -14px rgba(214, 165, 69, .95);
}

.cta-gold:hover::after,
.cta-gold:focus-visible::after { transform: translateX(3px); }

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 9vw, 118px);
  padding-top: clamp(32px, 4.6vw, 60px);
  background: linear-gradient(180deg, #0A0D13 0%, var(--ink-deep) 46%, var(--ink) 100%);
  border-top: 1px solid var(--line);
}

.footer-ridge {
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line) 12%, rgba(214, 165, 69, .8) 50%, var(--line) 88%, transparent);
  box-shadow: 0 0 18px rgba(214, 165, 69, .3);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 220px;
  pointer-events: none;
  background:
    radial-gradient(560px 160px at 18% 0%, rgba(111, 183, 179, .10), transparent 70%),
    radial-gradient(460px 140px at 82% 0%, rgba(214, 165, 69, .09), transparent 72%);
}

.footer-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.35fr .8fr 1.15fr .85fr;
  gap: clamp(24px, 3.4vw, 54px);
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter) clamp(28px, 4vw, 48px);
}

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

.footer-motto {
  margin-top: 14px;
  font-family: var(--serif);
  font-size: 1rem;
  letter-spacing: .06em;
  color: var(--slate);
}

.region-block {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 22px;
}

.region-sigil {
  position: relative;
  flex: none;
  width: 88px;
  height: 88px;
  border: 1px solid var(--line);
  border-radius: 50%;
  overflow: hidden;
  background:
    radial-gradient(circle at 30% 26%, rgba(242, 212, 138, .95) 0 1.4px, transparent 2.2px),
    radial-gradient(circle at 66% 16%, rgba(111, 183, 179, .85) 0 1.2px, transparent 2px),
    radial-gradient(circle at 78% 42%, rgba(214, 165, 69, .7) 0 1px, transparent 1.8px),
    radial-gradient(circle at 46% 34%, rgba(244, 239, 228, .55) 0 .9px, transparent 1.6px),
    linear-gradient(180deg, rgba(16, 20, 28, .9), rgba(7, 9, 13, .95));
}

.region-sigil::before {
  content: "";
  position: absolute;
  left: -12%;
  right: -12%;
  bottom: 16%;
  height: 40%;
  border-top: 1px solid rgba(111, 183, 179, .65);
  border-radius: 50% 50% 0 0 / 100% 100% 0 0;
}

.region-sigil::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(112deg, transparent 41.6%, rgba(214, 165, 69, .55) 42.2%, transparent 42.9%),
    linear-gradient(152deg, transparent 63.6%, rgba(111, 183, 179, .4) 64.2%, transparent 64.9%);
}

.region-label {
  font-family: var(--mono);
  font-size: .68rem;
  line-height: 1.9;
  letter-spacing: .16em;
  color: var(--slate);
}

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

.footer-col-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: .68rem;
  font-weight: 400;
  letter-spacing: .24em;
  color: var(--lake);
}

.footer-col-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.footer-list li + li { margin-top: 1px; }

.footer-list a {
  display: inline-block;
  padding: 5px 0;
  font-size: .9rem;
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), padding-left .2s var(--ease), border-color .2s var(--ease);
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--gold-soft);
  padding-left: 8px;
  border-bottom-color: rgba(214, 165, 69, .5);
}

.footer-contact { display: block; }

.contact-line {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(44, 52, 66, .7);
}

.contact-k {
  font-family: var(--mono);
  font-size: .64rem;
  letter-spacing: .18em;
  color: var(--slate);
}

.contact-v {
  font-family: var(--mono);
  font-size: .84rem;
  letter-spacing: .01em;
  color: var(--paper);
  word-break: break-all;
}

.contact-addr {
  padding-top: 14px;
  font-size: .84rem;
  font-style: normal;
  line-height: 1.8;
  color: var(--slate);
}

.contact-note {
  margin-top: 14px;
  padding-left: 12px;
  border-left: 2px solid rgba(111, 183, 179, .5);
  font-size: .76rem;
  line-height: 1.8;
  color: var(--slate);
}

.footer-base {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 18px var(--gutter) 24px;
  border-top: 1px solid rgba(44, 52, 66, .7);
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--slate);
}

.icp-badge {
  display: inline-block;
  padding: 4px 10px;
  border: 1px solid var(--line);
  color: var(--slate);
}

/* ---------- 8. 通用布局组件 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.2vw, 28px);
}

.rule {
  height: 1px;
  border: 0;
  background: var(--line);
}

.band {
  display: block;
  width: clamp(32px, 8vw, 88px);
  height: 3px;
  background: linear-gradient(90deg, var(--clay), var(--gold));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: .70rem;
  letter-spacing: .26em;
  color: var(--lake);
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 8px rgba(214, 165, 69, .8);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px clamp(16px, 3vw, 40px);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.section-index {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .24em;
  color: var(--gold);
}

/* 面包屑 */
.crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(18px, 3vw, 30px);
  font-family: var(--mono);
  font-size: .70rem;
  letter-spacing: .14em;
  color: var(--slate);
}

.crumb li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.crumb li + li::before {
  content: "/";
  color: var(--line);
}

.crumb a {
  color: var(--slate);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.crumb a:hover,
.crumb a:focus-visible { color: var(--gold-soft); }

.crumb [aria-current="page"] { color: var(--paper); }

/* ---------- 9. 文本与数字 ---------- */
.lede {
  max-width: 62ch;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.9;
  color: var(--slate);
}

.prose {
  max-width: 70ch;
  color: var(--slate);
  line-height: 1.9;
}

.prose > * + * { margin-top: 1.1em; }
.prose h2, .prose h3 { color: var(--paper); }
.prose strong { color: var(--paper); }
.prose a { color: var(--gold-soft); text-underline-offset: 3px; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose ul li { list-style: square; }
.prose ol li { list-style: decimal; }
.prose li + li { margin-top: .4em; }

.num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .01em;
}

/* ---------- 10. 按钮与标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--paper);
  font-size: .88rem;
  font-weight: 700;
  letter-spacing: .07em;
  text-decoration: none;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease);
}

.btn:hover,
.btn:focus-visible {
  border-color: var(--gold);
  color: var(--gold-soft);
  transform: translateY(-1px);
}

.btn--gold {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}

.btn--gold:hover,
.btn--gold:focus-visible {
  background: var(--gold-soft);
  border-color: var(--gold-soft);
  color: var(--ink);
}

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

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--lake);
  color: var(--lake);
  background: rgba(111, 183, 179, .08);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--slate);
  font-family: var(--mono);
  font-size: .70rem;
  letter-spacing: .12em;
  text-decoration: none;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}

.chip:hover,
.chip:focus-visible {
  border-color: var(--gold);
  color: var(--gold-soft);
}

.chip[aria-pressed="true"],
.chip[data-active="true"] {
  border-color: var(--gold);
  background: rgba(214, 165, 69, .12);
  color: var(--gold-soft);
}

/* ---------- 11. 档案夹卡片 ---------- */
.file-card {
  position: relative;
  display: block;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--panel);
  border: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  transition: border-color .22s var(--ease), background .22s var(--ease), transform .22s var(--ease), box-shadow .22s var(--ease);
}

.file-card:hover,
.file-card:focus-visible {
  background: var(--panel-hi);
  border-color: rgba(214, 165, 69, .62);
  transform: translateY(-3px);
  box-shadow: 0 18px 40px -30px rgba(214, 165, 69, .9);
}

.file-card__tab {
  display: inline-block;
  margin-bottom: 14px;
  padding: 4px 12px;
  background: var(--gold);
  color: var(--ink);
  font-family: var(--mono);
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .18em;
}

.file-card__body { padding-top: 2px; }
.file-card__body > * + * { margin-top: 10px; }

/* ---------- 12. 媒体容器基础规则 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(135deg, rgba(111, 183, 179, .14), transparent 55%),
    linear-gradient(315deg, rgba(182, 94, 60, .16), transparent 60%),
    var(--panel);
  border: 1px solid var(--line);
}

.media-frame > img,
.media-frame > picture,
.media-frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(7, 9, 13, .55) 0 1px, transparent 1px) 0 0 / 33.333% 100%,
    radial-gradient(circle at 88% 14%, rgba(214, 165, 69, .35) 0 1.5px, transparent 2px);
  opacity: .5;
}

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

/* ---------- 13. 渐显（data-reveal，JS 驱动） ---------- */
html[data-motion="on"] [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}

html[data-motion="on"] [data-reveal][data-reveal-in] {
  opacity: 1;
  transform: none;
}

/* ---------- 14. 响应式 ---------- */
@media (min-width: 1081px) {
  .site-nav { display: flex; }
}

@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    max-height: calc(100vh - 96px);
    overflow-y: auto;
    padding: 8px var(--gutter) 24px;
    background: linear-gradient(180deg, #0B0F16 0%, var(--ink) 100%);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 28px 56px -28px #000;
  }

  .site-header[data-open] .site-nav,
  .site-nav[data-open] { display: flex; }

  .nav-track {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-node {
    display: block;
    border-bottom: 1px solid rgba(44, 52, 66, .65);
  }

  .nav-node + .nav-node::before { display: none; }

  .nav-node a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 4px 14px 24px;
    font-size: .98rem;
    color: var(--paper);
  }

  .nav-node a::before {
    left: 4px;
    top: 50%;
    margin-top: -2px;
    margin-left: 0;
    width: 5px;
    height: 5px;
  }

  .nav-node a::after { display: none; }

  .site-nav .cta-gold {
    margin-top: 18px;
    justify-content: center;
  }

  .footer-grid { grid-template-columns: 1.2fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 880px) {
  .brand-tagline { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  body { background-size: 64px 64px, 64px 64px, 100% 100%, 100% 100%; }

  .header-grid { padding: 10px var(--gutter); }

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

  .footer-brand {
    padding-bottom: 22px;
    border-bottom: 1px solid rgba(44, 52, 66, .7);
  }

  .footer-base {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* ---------- 15. 动效降级 ---------- */
@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;
  }

  html[data-motion="on"] [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .nav-node a[aria-current="page"]::before { animation: none; }
}