/* ============================================================
   澳州幸运10 CN官网 · 共享样式 /assets/site.css
   夜航跑道框架 · 索引边框 · 纸张叠层
   ============================================================ */

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

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

body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, pre { margin: 0; }

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

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

button, input, select, textarea { font: inherit; color: inherit; background: none; border: 0; }

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

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

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

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #0B1626;
  --ink-2: #14263D;
  --ink-3: #1C3350;
  --gold: #F5A524;
  --gold-soft: #FFD79A;
  --coral: #FF6B7A;
  --paper: #F6F1E7;
  --sand: #D9CFC0;
  --mist: #8FA6C4;
  --cyan: #47D6C4;
  --white: #FFFFFF;

  --rail-w: 72px;
  --bar-h: 64px;
  --wrap: 1280px;
  --gap: 24px;

  --line: rgba(217, 207, 192, 0.30);
  --line-2: rgba(217, 207, 192, 0.56);
  --line-ink: rgba(11, 22, 38, 0.14);

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
    "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, Consolas,
    "Liberation Mono", "Courier New", monospace;

  --t-fast: 120ms;
  --t: 180ms;
  --t-slow: 260ms;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(11, 22, 38, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 22, 38, 0.035) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  padding-left: var(--rail-w);
  padding-top: var(--bar-h);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.14;
  text-wrap: balance;
}

h1 { font-size: clamp(34px, 5vw, 72px); }
h2 { font-size: clamp(26px, 3.2vw, 40px); }
h3 { font-size: clamp(20px, 2vw, 26px); }
h4 { font-size: 18px; letter-spacing: -0.01em; }

strong, b { font-weight: 800; }

main { display: block; min-height: 60vh; }

/* ---------- 4. 工具类 ---------- */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 48px);
}

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--dark { background: var(--ink); color: var(--paper); }
.section--ink-2 { background: var(--ink-2); color: var(--paper); }
.section--paper { background: var(--paper); color: var(--ink); }
.section--edge-top { border-top: 1px solid var(--line-ink); }

.grid { display: grid; gap: var(--gap); }
.grid--3-9 { grid-template-columns: 3fr 9fr; }
.grid--4-8 { grid-template-columns: 4fr 8fr; }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr)); }

.stack { display: flex; flex-direction: column; gap: 16px; }
.cluster { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

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

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
}
.section-head__title {
  font-size: clamp(24px, 3vw, 40px);
  font-weight: 900;
  letter-spacing: -0.02em;
}

/* ---------- 5. 标签 / 索引字 ---------- */
.label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}
.label--box {
  padding: 5px 10px;
  border: 1px solid var(--line-2);
  color: inherit;
}
.label--gold { color: var(--gold); }
.label--coral { color: var(--coral); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  border: 1px solid var(--line-ink);
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.6);
  color: var(--ink);
}
.tag--gold { border-color: rgba(245, 165, 36, 0.5); background: rgba(245, 165, 36, 0.16); color: #7E4E00; }
.tag--coral { border-color: rgba(255, 107, 122, 0.5); background: rgba(255, 107, 122, 0.14); color: #A81E2B; }
.tag--cyber { border-color: rgba(71, 214, 196, 0.5); background: rgba(71, 214, 196, 0.16); color: #126156; }

/* ---------- 6. 按钮 / 芯片 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 20px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: background-color var(--t) var(--ease), color var(--t) var(--ease),
    border-color var(--t) var(--ease), transform var(--t) var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn--gold { background: var(--gold); border-color: var(--gold); color: var(--ink); }
.btn--gold:hover { background: var(--gold-soft); border-color: var(--gold-soft); }
.btn--ghost { background: transparent; border-color: var(--line-2); color: var(--paper); }
.btn--ghost:hover { border-color: var(--gold); color: var(--gold); }
.btn--ink { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.btn--ink:hover { background: var(--ink-2); border-color: var(--ink-2); }
.btn--coral { background: var(--coral); border-color: var(--coral); color: var(--white); }
.btn--sm { padding: 9px 14px; font-size: 12px; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 11px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
  background: rgba(20, 38, 61, 0.85);
  border: 1px solid var(--line);
  border-radius: 2px;
  white-space: nowrap;
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease);
}
.chip:hover, .chip:focus-visible { color: var(--ink); background: var(--gold); border-color: var(--gold); }

/* ---------- 7. 面板 / 卡片 / 叠层 ---------- */
.panel {
  position: relative;
  padding: clamp(20px, 3vw, 32px);
  background: var(--white);
  border: 1px solid var(--line-ink);
  border-radius: 2px;
}
.panel--dark { background: var(--ink-2); border-color: var(--line); color: var(--paper); }
.panel--gold { background: var(--gold-soft); border-color: rgba(245, 165, 36, 0.55); }

.card {
  position: relative;
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--line-ink);
  border-radius: 2px;
  transition: transform var(--t) var(--ease), border-color var(--t) var(--ease);
}
.card:hover { transform: translateY(-3px); border-color: var(--gold); }
.card__index { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.18em; color: var(--mist); }
.card__title { margin: 8px 0 6px; font-size: 20px; font-weight: 900; letter-spacing: -0.01em; }
.card__meta { font-size: 13px; color: #57616F; }

.card-stack { position: relative; z-index: 0; }
.card-stack > * { position: relative; z-index: 1; }
.card-stack::before {
  content: "";
  position: absolute;
  top: 12px; left: 12px; right: -12px; bottom: -12px;
  background: var(--ink-2);
  border: 1px solid var(--line);
  z-index: 0;
}
.card-stack::after {
  content: "";
  position: absolute;
  top: 6px; left: 6px; right: -6px; bottom: -6px;
  background: var(--gold-soft);
  z-index: 0;
}

/* ---------- 8. 索引板 / 数据 ---------- */
.index-board {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.index-board__cell {
  padding: 14px 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-align: center;
  background: var(--ink);
  color: var(--paper);
  transition: background-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.index-board__cell:hover { background: var(--gold); color: var(--ink); }

.stat { padding-left: 16px; border-left: 3px solid var(--gold); }
.stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(28px, 3vw, 40px);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--gold);
}
.stat__label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}

/* ---------- 9. 面包屑 / 长文 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-block: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}
.breadcrumb li { display: flex; align-items: center; gap: 10px; }
.breadcrumb li + li::before { content: "/"; color: var(--sand); }
.breadcrumb a {
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.breadcrumb a:hover { color: var(--gold); border-color: var(--gold); }
.breadcrumb [aria-current="page"] { color: var(--ink); }

.prose { max-width: 68ch; }
.prose p { margin-bottom: 1.1em; max-width: 68ch; }
.prose h2 { margin-block: 2em 0.6em; }
.prose h3 { margin-block: 1.6em 0.5em; }
.prose a { border-bottom: 1px solid var(--gold); }
.prose a:hover { background: var(--gold-soft); }
.prose li { position: relative; padding-left: 22px; margin-bottom: 0.5em; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.72em;
  width: 10px; height: 2px;
  background: var(--gold);
}
.prose code {
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: rgba(11, 22, 38, 0.07);
  border-radius: 2px;
}

/* ---------- 10. 图片容器（页面阶段放置素材） ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: 2px;
}
.media > img,
.media > picture,
.media > svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--21x9 { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--pattern {
  background-image:
    repeating-linear-gradient(135deg, rgba(245, 165, 36, 0.18) 0 2px, transparent 2px 14px),
    linear-gradient(160deg, var(--ink-2), var(--ink));
}
.media__label {
  position: absolute;
  left: 0; bottom: 0;
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--gold);
}
.media__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 22, 38, 0) 40%, rgba(11, 22, 38, 0.82));
  pointer-events: none;
}
.media-frame { padding: 10px; background: var(--white); border: 1px solid var(--line-ink); }

/* ---------- 11. 动效基础 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease);
}
html.js [data-reveal].is-revealed { opacity: 1; transform: none; }

.is-anchor-flash { animation: anchor-flash 1.5s var(--ease); }
@keyframes anchor-flash {
  0% { box-shadow: 0 0 0 3px rgba(245, 165, 36, 0.85); }
  100% { box-shadow: 0 0 0 3px rgba(245, 165, 36, 0); }
}

/* ---------- 12. 顶部框架：导轨 + 顶栏 ---------- */
.skip-link {
  position: fixed;
  top: 10px;
  left: calc(var(--rail-w) + 12px);
  z-index: 200;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  background: var(--gold);
  color: var(--ink);
  border-radius: 2px;
  transform: translateY(-200%);
  transition: transform var(--t) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  pointer-events: none;
}
.site-header > * { pointer-events: auto; }

/* --- 左侧导轨 --- */
.rail {
  position: relative;
  flex: 0 0 var(--rail-w);
  width: var(--rail-w);
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 14px 0 16px;
  background: var(--ink);
  border-right: 1px solid var(--line);
}
.rail::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gold);
}

.rail__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 6px 0 4px;
  color: var(--paper);
}
.rail__brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  background: var(--gold);
  color: var(--ink);
  border-radius: 2px;
  transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease);
}
.rail__brand:hover .rail__brand-mark,
.rail__brand:focus-visible .rail__brand-mark {
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px var(--gold), 0 0 20px rgba(245, 165, 36, 0.5);
}
.rail__brand-word {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.24em;
  line-height: 1;
  color: var(--gold-soft);
}

.rail__meta { display: flex; flex-direction: column; align-items: center; padding: 8px 0; }
.rail__note {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--mist);
}

/* --- 移动菜单按钮 --- */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--paper);
  background: transparent;
  border: 1px solid var(--line-2);
  border-radius: 2px;
  cursor: pointer;
}
.nav-toggle:hover { border-color: var(--gold); color: var(--gold); }
.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: var(--gold);
}
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--gold);
  transition: transform var(--t) var(--ease);
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after { transform: translateY(-6px) rotate(-45deg); }

/* --- 主导航（桌面：导轨内竖排） --- */
.nav-panel {
  flex: 1 1 auto;
  min-height: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 12px 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: none;
}
.nav-panel::-webkit-scrollbar { width: 0; height: 0; }

.nav-panel__list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  width: 100%;
}
.nav-panel__item { display: flex; justify-content: center; width: 100%; }
.nav-panel__link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  width: 100%;
  padding: 9px 0;
  color: var(--mist);
  transition: color var(--t) var(--ease), background-color var(--t) var(--ease);
}
.nav-panel__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: rgba(143, 166, 196, 0.75);
  transition: color var(--t) var(--ease);
}
.nav-panel__label {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.2em;
}
.nav-panel__link::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 50%;
  width: 3px;
  height: 0;
  background: var(--gold);
  transform: translateY(-50%);
  transition: height var(--t-slow) var(--ease);
}
.nav-panel__link:hover,
.nav-panel__link:focus-visible { color: var(--paper); background: rgba(143, 166, 196, 0.08); }
.nav-panel__link:hover::before { height: 52%; }
.nav-panel__link[aria-current="page"] { color: var(--gold); }
.nav-panel__link[aria-current="page"] .nav-panel__num { color: var(--coral); }
.nav-panel__link[aria-current="page"]::before { height: 88%; }

.nav-panel__foot { display: none; }

/* --- 顶栏 --- */
.topbar {
  position: relative;
  flex: 1 1 auto;
  align-self: flex-start;
  min-width: 0;
  height: var(--bar-h);
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 clamp(16px, 2.4vw, 32px);
  background: rgba(11, 22, 38, 0.94);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  overflow: hidden;
}
.topbar::after {
  content: "";
  position: absolute;
  top: -30px;
  bottom: -30px;
  right: -60px;
  width: 220px;
  background: linear-gradient(90deg, rgba(245, 165, 36, 0), rgba(245, 165, 36, 0.22));
  transform: skewX(-18deg);
  pointer-events: none;
  z-index: 0;
}
.topbar__brand, .topbar__tools, .topbar__cta, .topbar__progress { position: relative; z-index: 1; }

.topbar__brand { display: flex; align-items: baseline; gap: 14px; min-width: 0; }
.topbar__name {
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.02em;
  color: var(--white);
  white-space: nowrap;
}
.topbar__tagline {
  padding-left: 14px;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold-soft);
  border-left: 1px solid var(--line);
  white-space: nowrap;
}
.topbar__tools { display: flex; gap: 8px; margin-left: auto; }
.topbar__cta { white-space: nowrap; }
.topbar__progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 90ms linear;
}
body.is-scrolled .topbar { border-bottom-color: rgba(245, 165, 36, 0.5); }

/* ---------- 13. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(48px, 8vw, 120px);
  background: var(--ink);
  color: var(--paper);
}
.footer__stripe {
  display: block;
  height: 10px;
  background: repeating-linear-gradient(135deg, var(--gold) 0 12px, var(--ink-2) 12px 24px);
}
.footer__annot {
  position: absolute;
  top: 56px;
  right: 12px;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: rgba(143, 166, 196, 0.5);
}
.footer__inner {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) clamp(18px, 4vw, 48px) 28px;
}
.footer__top {
  display: grid;
  grid-template-columns: minmax(260px, 1.3fr) 2.4fr;
  gap: clamp(28px, 5vw, 64px);
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
}
.footer__brandname {
  display: block;
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--white);
}
.footer__brandline { margin-top: 10px; font-size: 13px; letter-spacing: 0.14em; color: var(--gold-soft); }
.footer__brandcta { margin-top: 22px; }

.footer__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
}
.footer__coltitle {
  margin-bottom: 14px;
  padding-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
  border-bottom: 1px solid var(--line);
}
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--paper);
  opacity: 0.82;
  transition: color var(--t) var(--ease), opacity var(--t) var(--ease);
}
.footer__link::before {
  content: "";
  width: 10px;
  height: 1px;
  background: var(--sand);
  transition: width var(--t) var(--ease), background-color var(--t) var(--ease);
}
.footer__link:hover,
.footer__link:focus-visible { color: var(--gold); opacity: 1; }
.footer__link:hover::before,
.footer__link:focus-visible::before { width: 20px; background: var(--gold); }

.footer__contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 20px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}
.footer__contact-item { display: flex; flex-direction: column; gap: 6px; }
.footer__contact-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--mist);
}
.footer__contact-value { font-size: 14px; color: var(--paper); word-break: break-word; }

.footer__note { margin-top: 18px; max-width: 70ch; font-size: 13px; line-height: 1.7; color: var(--mist); }

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.footer__legal,
.footer__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1180px) {
  .topbar__tagline { display: none; }
}
@media (max-width: 1024px) {
  .topbar__tools { display: none; }
  .footer__top { grid-template-columns: 1fr; gap: 36px; }
}
@media (max-width: 900px) {
  body { padding-left: 0; padding-top: 56px; }
  body.is-nav-open { overflow: hidden; }
  body.is-nav-open::after {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(11, 22, 38, 0.66);
    z-index: 70;
  }

  .site-header { display: block; }
  .skip-link { top: 8px; left: 12px; }

  .rail {
    flex: 0 0 auto;
    width: 100%;
    height: 56px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 0 14px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .rail::before { height: 2px; }
  .rail__brand { flex-direction: row; align-items: center; gap: 10px; padding: 0; }
  .rail__brand-mark { width: 32px; height: 32px; font-size: 11px; }
  .rail__brand-word { writing-mode: horizontal-tb; font-size: 12px; letter-spacing: 0.18em; }
  .rail__meta { display: none; }

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

  .topbar { display: none; }

  .nav-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: auto;
    z-index: 80;
    width: min(86vw, 340px);
    height: 100%;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 76px 22px 28px;
    background: var(--ink);
    border-left: 2px solid var(--gold);
    overflow-y: auto;
    transform: translateX(102%);
    transition: transform var(--t-slow) var(--ease);
  }
  .nav-panel[data-open] { transform: translateX(0); }

  .nav-panel__list { align-items: stretch; gap: 0; }
  .nav-panel__item { display: block; border-bottom: 1px solid var(--line); }
  .nav-panel__item:first-child { border-top: 1px solid var(--line); }
  .nav-panel__link { flex-direction: row; align-items: center; gap: 14px; width: 100%; padding: 15px 2px; }
  .nav-panel__label { writing-mode: horizontal-tb; font-size: 17px; letter-spacing: 0.06em; }
  .nav-panel__num { font-size: 11px; }
  .nav-panel__link::before { left: 0; top: auto; bottom: -1px; width: 0; height: 2px; transform: none; }
  .nav-panel__link:hover::before { width: 100%; height: 2px; }
  .nav-panel__link[aria-current="page"]::before { width: 100%; height: 2px; }

  .nav-panel__foot { display: flex; flex-direction: column; gap: 14px; margin-top: 28px; }
  .nav-panel__cta { width: 100%; }
  .nav-panel__contact {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--mist);
  }
  .nav-panel__contact:hover { color: var(--gold); }

  .grid--3-9, .grid--4-8 { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__annot { display: none; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .footer__grid { grid-template-columns: 1fr; gap: 26px; }
  .footer__bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
  .section-head { margin-bottom: 24px; }
}

/* ---------- 15. 无障碍动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  html.js [data-reveal] { opacity: 1; transform: none; }
  .nav-panel { transition: none; }
}