/* ==========================================================================
   顺发娱乐会馆 · /assets/site.css
   共享外壳：档案会馆 · 侧轨导览 + 倾斜页脚
   ========================================================================== */

/* 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, ul, ol, li, figure, blockquote, dl, dd, hr {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }

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

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

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

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

input, select, textarea { font: inherit; color: inherit; }

hr { border: 0; }

/* 2. 变量 ------------------------------------------------------------------ */
:root {
  color-scheme: dark;

  --ink-950: #0B1223;
  --ink-800: #141F3A;
  --ink-600: #24345C;
  --gray-400: #7C8798;
  --cream-100: #F5F1E6;
  --amber-500: #E2A23C;
  --amber-300: #F3CD83;
  --cinnabar-500: #B5443C;
  --grass-600: #4E6159;

  --surface: rgba(20, 31, 58, 0.72);
  --surface-2: rgba(36, 52, 92, 0.55);
  --text: #E7EBF3;
  --text-dim: #B6BFCF;
  --text-mute: var(--gray-400);
  --line: rgba(124, 135, 152, 0.32);
  --line-soft: rgba(124, 135, 152, 0.16);
  --line-amber: rgba(226, 162, 60, 0.5);

  --rail-w: 276px;
  --bar-h: 68px;
  --shell-max: 1160px;
  --gut: clamp(18px, 4vw, 56px);
  --cut: 18px;
  --radius: 4px;

  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-serif: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", "SimSun", Georgia, serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;

  --ease: cubic-bezier(0.22, 0.8, 0.24, 1);
}

/* 3. 基础与中文排版 -------------------------------------------------------- */
body {
  min-height: 100vh;
  overflow-x: hidden;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.8;
  letter-spacing: 0.01em;
  color: var(--text);
  background-color: var(--ink-950);
  background-image:
    radial-gradient(120% 68% at 82% -12%, rgba(226, 162, 60, 0.16), transparent 62%),
    radial-gradient(95% 60% at 4% 106%, rgba(78, 97, 89, 0.34), transparent 64%),
    linear-gradient(180deg, #0B1223 0%, #0E1730 46%, #0B1223 100%);
  background-attachment: fixed;
}

h1, .h1, .display-1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.06;
  font-weight: 900;
  letter-spacing: -0.02em;
}

h2, .h2 {
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: -0.012em;
}

h3, .h3 {
  font-size: clamp(1.12rem, 2.1vw, 1.36rem);
  line-height: 1.4;
  font-weight: 800;
}

h4, .h4 { font-size: 1rem; font-weight: 800; line-height: 1.5; }

p + p { margin-top: 1em; }

strong, b { font-weight: 800; color: var(--cream-100); }

.mono, code, kbd, samp {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.lede {
  max-width: 62ch;
  font-size: clamp(1.02rem, 1.5vw, 1.17rem);
  line-height: 1.85;
  color: var(--text-dim);
}

.prose {
  max-width: 68ch;
  font-family: var(--font-serif);
  font-size: 17.5px;
  line-height: 1.9;
  color: #DCE2EC;
}

.prose h2, .prose h3 { font-family: var(--font-sans); margin-top: 1.8em; }
.prose h2 + p, .prose h3 + p { margin-top: 0.6em; }
.prose ul, .prose ol { margin: 1em 0 1em 1.3em; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.42em; }
.prose a { color: var(--amber-300); border-bottom: 1px solid var(--line-amber); }
.prose blockquote {
  margin: 1.4em 0;
  padding: 0.2em 0 0.2em 1.1em;
  border-left: 2px solid var(--amber-500);
  color: var(--cream-100);
}

/* 4. 布局工具 -------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--gut);
}

.section { padding-block: clamp(44px, 6.5vw, 92px); }
.section--tight { padding-block: clamp(26px, 4vw, 52px); }

.section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px 26px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.stack { display: flex; flex-direction: column; gap: clamp(14px, 2vw, 24px); }
.stack--sm { gap: 10px; }

.grid { display: grid; gap: clamp(16px, 2.2vw, 28px); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.split { display: grid; gap: clamp(14px, 2vw, 24px); grid-template-columns: 1fr; }
@media (min-width: 760px) { .split { grid-template-columns: 1fr 1fr; } }

.rule { height: 1px; background: var(--line); border: 0; }
.rule--slant {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-amber) 32%, rgba(226, 162, 60, 0.08) 100%);
}

/* 5. 通用组件 -------------------------------------------------------------- */
.skip-link {
  position: absolute;
  left: 12px;
  top: -120px;
  z-index: 200;
  padding: 10px 18px;
  font-weight: 800;
  font-size: 14px;
  color: #20160A;
  background: var(--amber-500);
  border-radius: 0 0 10px 10px;
  transition: top 0.18s var(--ease);
}
.skip-link:focus { top: 0; }

:focus-visible {
  outline: 2px solid var(--amber-500);
  outline-offset: 3px;
  border-radius: 3px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55em;
  padding: 0.72em 1.35em;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1.2;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.btn--amber { background: var(--amber-500); color: #20160A; }
.btn--amber:hover { background: var(--amber-300); transform: translateY(-1px); }
.btn--ghost { border-color: var(--line); color: var(--text); background: rgba(36, 52, 92, 0.4); }
.btn--ghost:hover { border-color: var(--line-amber); color: var(--amber-300); }
.btn--sm { padding: 0.52em 1em; font-size: 12.5px; }
.btn--block { width: 100%; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  background: rgba(36, 52, 92, 0.5);
  border: 1px solid var(--line);
  border-radius: 999px;
  white-space: nowrap;
}
.tag--amber { color: var(--amber-300); background: rgba(226, 162, 60, 0.12); border-color: var(--line-amber); }
.tag--red { color: #E79A93; background: rgba(181, 68, 60, 0.18); border-color: rgba(181, 68, 60, 0.55); }
.tag--cream { color: var(--ink-950); background: var(--cream-100); border-color: transparent; }

.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 30px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.panel--edge { border-left: 2px solid var(--amber-500); }
.panel--cut {
  border: 0;
  border-radius: 0;
  background: linear-gradient(180deg, rgba(36, 52, 92, 0.72), rgba(20, 31, 58, 0.92));
  clip-path: polygon(
    0 0,
    calc(100% - var(--cut)) 0,
    100% var(--cut),
    100% 100%,
    var(--cut) 100%,
    0 calc(100% - var(--cut))
  );
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(16px, 2vw, 24px);
  background: linear-gradient(180deg, rgba(36, 52, 92, 0.5), rgba(20, 31, 58, 0.78));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.card--link:hover {
  transform: translateY(-4px);
  border-color: var(--line-amber);
  background: linear-gradient(180deg, rgba(36, 52, 92, 0.72), rgba(20, 31, 58, 0.9));
}

.version {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--amber-500);
}

.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cream-100);
}
.stat__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray-400);
}

.ledger { font-size: 14.6px; }
.ledger caption {
  text-align: left;
  padding-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-400);
}
.ledger th, .ledger td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px dashed var(--line);
}
.ledger th {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-400);
  border-bottom: 1px solid var(--line);
}
.ledger tbody tr { transition: background 0.2s var(--ease); }
.ledger tbody tr:hover { background: rgba(226, 162, 60, 0.08); }
.ledger td:first-child { font-family: var(--font-mono); color: var(--amber-300); white-space: nowrap; }

.breadcrumbs { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; color: var(--gray-400); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.breadcrumbs a:hover { color: var(--amber-300); }
.breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}
.breadcrumbs__item[aria-current="page"] { color: var(--cream-100); }

/* 图片容器：供页面阶段放置本地素材 */
.media {
  position: relative;
  overflow: hidden;
  background: linear-gradient(140deg, var(--ink-600), var(--ink-800));
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.media img { 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--cut {
  border: 0;
  border-radius: 0;
  clip-path: polygon(
    0 0,
    calc(100% - 26px) 0,
    100% 26px,
    100% 100%,
    26px 100%,
    0 calc(100% - 26px)
  );
}
.media--tilt { transform: rotate(-1.4deg); }
.media__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--gray-400);
}
.media__badge {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: #20160A;
  background: var(--amber-500);
}

/* 折叠内容组 */
.fold {
  background: rgba(20, 31, 58, 0.6);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.fold + .fold { margin-top: 10px; }
.fold__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 15px 18px;
  text-align: left;
  font-size: 15.5px;
  font-weight: 800;
  color: var(--text);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.fold__trigger:hover { background: rgba(36, 52, 92, 0.5); color: var(--cream-100); }
.fold__trigger::after {
  content: "＋";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--amber-500);
}
.fold__trigger[aria-expanded="true"] { color: var(--amber-300); background: rgba(226, 162, 60, 0.1); }
.fold__trigger[aria-expanded="true"]::after { content: "－"; }
.fold__panel { padding: 4px 18px 18px; border-top: 1px dashed var(--line); }
.fold__panel[hidden] { display: none; }
.fold__body { padding-top: 12px; font-size: 15.6px; line-height: 1.85; color: var(--text-dim); }

/* 6. 头部：侧边导览轨道 ---------------------------------------------------- */
.rail {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 70;
  background: linear-gradient(180deg, rgba(11, 18, 35, 0.97), rgba(11, 18, 35, 0.86));
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  backdrop-filter: blur(14px) saturate(120%);
}

.rail__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  min-height: var(--bar-h);
  padding: 10px var(--gut);
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand__mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: #20160A;
  background: linear-gradient(140deg, var(--amber-300), var(--amber-500));
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
  transition: width 0.25s var(--ease), height 0.25s var(--ease), font-size 0.25s var(--ease);
}
.brand__text { display: block; min-width: 0; }
.brand__name {
  display: block;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.3;
  color: var(--cream-100);
}
.brand__tag {
  display: block;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gray-400);
}

.rail__nav-shell { position: relative; flex: 0 0 auto; }

.rail__toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 15px 9px 14px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text);
  background: rgba(36, 52, 92, 0.62);
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.rail__toggle:hover { border-color: var(--line-amber); color: var(--amber-300); }
.rail__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: background 0.2s var(--ease);
}
.rail__bars::before,
.rail__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background: currentColor;
  transition: transform 0.22s var(--ease);
}
.rail__bars::before { top: -5px; }
.rail__bars::after { top: 5px; }
.rail__toggle[aria-expanded="true"] .rail__bars { background: transparent; }
.rail__toggle[aria-expanded="true"] .rail__bars::before { transform: translateY(5px) rotate(45deg); }
.rail__toggle[aria-expanded="true"] .rail__bars::after { transform: translateY(-5px) rotate(-45deg); }
.rail__toggle-text { line-height: 1; }

.rail__nav { display: flex; flex-direction: column; }

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

.rail__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 13px;
  font-size: 15.5px;
  font-weight: 700;
  color: #C9D1E0;
  border: 1px solid transparent;
  border-radius: 10px;
  transition: padding 0.25s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.rail__link:hover { background: rgba(36, 52, 92, 0.6); color: var(--cream-100); }
.rail__link[aria-current="page"] {
  color: var(--amber-300);
  background: rgba(226, 162, 60, 0.12);
  border-color: var(--line-amber);
}
.rail__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 22%;
  bottom: 22%;
  width: 2px;
  background: var(--amber-500);
}
.rail__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--gray-400);
}
.rail__link[aria-current="page"] .rail__idx { color: var(--amber-500); }
.rail__label { min-width: 0; }

.rail__foot {
  margin-top: auto;
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.rail__note { font-size: 11px; letter-spacing: 0.06em; color: var(--gray-400); }

/* 移动端导航面板默认隐藏 */
@media (max-width: 1023px) {
  .rail { right: 0; width: auto; }
  .rail__nav {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    z-index: 2;
    width: min(80vw, 340px);
    max-height: 72vh;
    overflow-y: auto;
    padding: 12px;
    gap: 12px;
    background: linear-gradient(180deg, #16223E, #101A31);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: 0 26px 60px rgba(4, 8, 18, 0.62);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.22s var(--ease), transform 0.22s var(--ease), visibility 0.22s;
  }
  .rail__nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .rail__nav[data-open] .rail__link { padding: 12px 13px; }
  .rail__foot { margin-top: 4px; padding-top: 14px; border-top: 1px dashed var(--line); }
}

/* 桌面：固定竖轨 + 轨道刻度 */
@media (min-width: 1024px) {
  body { padding-left: var(--rail-w); }

  .rail {
    width: var(--rail-w);
    height: 100vh;
    padding: clamp(20px, 3vh, 34px) 20px;
    border-right: 1px solid var(--line);
  }
  .rail::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 1px;
    height: 100%;
    background: repeating-linear-gradient(180deg, rgba(226, 162, 60, 0.5) 0 2px, transparent 2px 13px);
    pointer-events: none;
  }
  .rail__inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 22px;
    height: 100%;
    min-height: 0;
    padding: 0;
    border-bottom: 0;
  }
  .rail__toggle { display: none; }
  .rail__nav-shell,
  .rail__nav { flex: 1 1 auto; display: flex; flex-direction: column; }
  .rail__nav-shell { min-height: 0; }
  .rail__list { margin-top: 2px; }
  .rail__link { padding: 11px 13px; }
  .rail__idx { width: 20px; }

  .rail[data-compact] .brand__tag { display: none; }
  .rail[data-compact] .brand__mark { width: 34px; height: 34px; font-size: 15px; }
  .rail[data-compact] .rail__idx { display: none; }
  .rail[data-compact] .rail__link { padding: 8px 13px; font-size: 14.5px; }
  .rail[data-compact] .rail__foot { padding-top: 12px; }
}

/* 7. 页脚：倾斜档案柜 ------------------------------------------------------ */
.footer {
  position: relative;
  margin-top: clamp(44px, 7vw, 96px);
  background:
    radial-gradient(90% 60% at 88% 0%, rgba(226, 162, 60, 0.12), transparent 60%),
    linear-gradient(180deg, #16223E 0%, #0E1730 42%, #0B1223 100%);
  clip-path: polygon(0 3.4vw, 100% 0, 100% 100%, 0 100%);
}

.footer__inner {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: calc(3.4vw + 34px) var(--gut) 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.2vw, 46px);
}

.footer__brand { display: flex; flex-direction: column; gap: 14px; grid-column: 1 / -1; }
.footer__brand-name {
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  font-weight: 900;
  letter-spacing: -0.012em;
  color: var(--cream-100);
}
.footer__brand-name:hover { color: var(--amber-300); }
.footer__brand-note {
  max-width: 42ch;
  font-size: 14.6px;
  line-height: 1.8;
  color: var(--text-dim);
}

.footer__col,
.footer__contact { min-width: 0; }

.footer__col-title {
  position: relative;
  margin-bottom: 14px;
  padding-bottom: 10px;
  font-size: 12px;
  font-weight: 800;
  font-family: var(--font-mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-400);
}
.footer__col-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 34px;
  height: 1px;
  background: var(--amber-500);
}

.footer__list { display: flex; flex-direction: column; gap: 9px; }
.footer__link {
  display: inline-block;
  font-size: 15px;
  color: var(--text-dim);
  transition: color 0.2s var(--ease), transform 0.2s var(--ease);
}
.footer__link:hover { color: var(--amber-300); transform: translateX(3px); }

.footer__contact-list { display: flex; flex-direction: column; gap: 12px; }
.footer__contact-item { display: flex; flex-direction: column; gap: 2px; }
.footer__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-400);
}
.footer__value { font-size: 14.6px; line-height: 1.7; color: var(--text-dim); word-break: break-word; }

.footer__bottom {
  margin-top: clamp(30px, 4vw, 56px);
  border-top: 1px solid var(--line);
  background: rgba(11, 18, 35, 0.55);
}
.footer__bottom-inner {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding: 18px var(--gut) 30px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  font-family: var(--font-mono);
  font-size: 12.4px;
  letter-spacing: 0.04em;
  color: var(--gray-400);
}
.footer__legal { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 16px; }
.footer__icp { color: var(--amber-300); }
.footer__copyright { color: var(--gray-400); }
.footer__address { color: var(--gray-400); }

@media (min-width: 620px) {
  .footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__brand { grid-column: 1 / -1; }
}

@media (min-width: 1024px) {
  .footer__inner {
    grid-template-columns: minmax(230px, 1.6fr) repeat(3, minmax(120px, 1fr)) minmax(190px, 1.2fr);
    gap: clamp(26px, 2.6vw, 40px);
  }
  .footer__brand { grid-column: auto; }
}

/* 8. JS 注入组件 ----------------------------------------------------------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  height: 2px;
  background: rgba(124, 135, 152, 0.16);
  pointer-events: none;
}
.scroll-progress__bar {
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--amber-500), var(--cinnabar-500));
}
@media (min-width: 1024px) { .scroll-progress { left: var(--rail-w); } }

.to-top {
  position: fixed;
  right: clamp(14px, 3vw, 30px);
  bottom: clamp(14px, 3vw, 30px);
  z-index: 88;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--amber-300);
  background: rgba(20, 31, 58, 0.92);
  border: 1px solid var(--line);
  border-radius: 50%;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0.25s, border-color 0.2s var(--ease);
}
.to-top[data-visible] { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { border-color: var(--line-amber); color: var(--cream-100); }

/* 9. 显现协议 -------------------------------------------------------------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.js-ready [data-reveal].is-in { opacity: 1; transform: none; }

/* 10. 无障碍与动效偏好 ----------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js-ready [data-reveal] { opacity: 1; transform: none; transition: none; }
  .to-top,
  .scroll-progress__bar,
  .rail__nav,
  .rail__link,
  .brand__mark,
  .btn,
  .card,
  .footer__link { transition: none; }
  .btn--amber:hover,
  .card--link:hover,
  .footer__link:hover { transform: none; }
}