/* ==========================================================================
   皇家至尊 ASCEND — 共享样式表 /assets/site.css
   曜石黑底 · 蓝图坐标网格 · 暗金单锚点 · 粗边框硬阴影
   ========================================================================== */

/* ---------- 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, dt, dd {
  margin: 0;
}

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

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

a { color: inherit; }

button { font: inherit; color: inherit; }

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

/* ---------- 2. 变量 ---------- */
:root {
  --obsidian: #07060B;
  --violet-deep: #1B0C33;
  --royal-deep: #2A1148;
  --royal: #4B1F86;
  --gold: #B8892B;
  --gold-hot: #E8B84B;
  --gold-light: #F2D27A;
  --jade: #35C08D;
  --frost: #F4F1EA;
  --lilac: #A9A2B8;
  --line: #3A3350;
  --alert: #D8563F;

  --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", "Liberation Mono", Consolas, Menlo, monospace;

  --baseline: 24px;
  --shell: 1280px;
  --shell-wide: 1440px;
  --gutter: 24px;
  --t: 160ms;
  --ease: cubic-bezier(.2, .6, .25, 1);
  --hard-shadow: 10px 10px 0 rgba(3, 3, 7, .9);
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100%;
  background-color: var(--obsidian);
  background-image:
    linear-gradient(rgba(58, 51, 80, .20) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58, 51, 80, .20) 1px, transparent 1px);
  background-size: var(--baseline) var(--baseline);
  color: var(--frost);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: .01em;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -.01em;
}

p { overflow-wrap: break-word; }

strong { color: var(--gold-light); font-weight: 700; }

hr { border: 0; }

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

/* ---------- 4. 通用排版组件 ---------- */
.ra-display {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(40px, 7vw, 96px);
  line-height: 1.06;
  letter-spacing: -.01em;
}

.ra-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--gold);
}

.ra-lead {
  font-size: clamp(17px, 1.3vw, 19px);
  line-height: 1.8;
  color: var(--lilac);
  max-width: 64ch;
}

.ra-prose { max-width: 72ch; }
.ra-prose p { margin-bottom: 1.3em; }
.ra-prose p:last-child { margin-bottom: 0; }
.ra-prose h2 {
  font-size: clamp(24px, 2.6vw, 34px);
  margin: 1.6em 0 .7em;
}
.ra-prose h3 {
  font-size: clamp(19px, 1.8vw, 23px);
  margin: 1.4em 0 .5em;
}
.ra-prose ul { margin: 0 0 1.3em; }
.ra-prose li {
  position: relative;
  padding-left: 20px;
  margin-bottom: .5em;
}
.ra-prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 1px;
  background: var(--gold);
}

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

.ra-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--gold-light);
  border: 1px solid rgba(184, 137, 43, .5);
  padding: 4px 9px;
}

.ra-callout {
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  background: linear-gradient(90deg, rgba(43, 17, 72, .7), rgba(7, 6, 11, .2));
  padding: 20px 24px;
  color: var(--lilac);
  font-size: 16px;
}

.ra-metric {
  border: 1px solid var(--line);
  background: rgba(27, 12, 51, .55);
  padding: 18px 20px;
}
.ra-metric__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.1;
  color: var(--gold-light);
}
.ra-metric__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--lilac);
  letter-spacing: .04em;
}

/* ---------- 5. 容器与页面节奏 ---------- */
.ra-main { display: block; }

.ra-container {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.ra-container--wide { max-width: var(--shell-wide); }

.ra-section { padding: 72px 0; }
.ra-section--tight { padding: 40px 0; }

/* ---------- 6. 跳至主内容 ---------- */
.ra-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  display: inline-block;
  padding: 12px 18px;
  background: var(--gold-light);
  color: #150A24;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  text-decoration: none;
}
.ra-skip:focus { left: 16px; top: 16px; }

/* ---------- 7. 命令栏头部 ---------- */
.ra-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: rgba(7, 6, 11, .95);
  background-image:
    linear-gradient(rgba(58, 51, 80, .22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58, 51, 80, .22) 1px, transparent 1px);
  background-size: var(--baseline) var(--baseline);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 12px 0 rgba(3, 3, 7, .55);
}

.ra-header__inner {
  max-width: var(--shell-wide);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.ra-header__bar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  min-height: 74px;
}

/* 品牌 */
.ra-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--frost);
  padding: 6px 0;
}

.ra-brand__crest {
  position: relative;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border: 1px solid var(--gold);
  box-shadow:
    inset 0 0 0 3px var(--obsidian),
    inset 0 0 0 4px rgba(184, 137, 43, .5);
  background: linear-gradient(140deg, var(--royal-deep), var(--violet-deep));
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 19px;
  line-height: 1;
  color: var(--gold-light);
  transition: box-shadow var(--t) var(--ease), color var(--t) var(--ease);
}
.ra-brand:hover .ra-brand__crest {
  color: #fff;
  box-shadow:
    inset 0 0 0 3px var(--obsidian),
    inset 0 0 0 4px var(--gold-light),
    0 0 0 1px rgba(232, 184, 75, .35);
}

.ra-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.ra-brand__name {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 21px;
  letter-spacing: .02em;
}
.ra-brand__latin {
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--gold);
}

.ra-brand__coord {
  margin-left: 4px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--lilac);
}

/* 导航 */
.ra-nav { justify-self: center; }

.ra-nav__list {
  display: flex;
  align-items: stretch;
  gap: 2px;
}

.ra-nav__item { display: flex; }

.ra-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 12px;
  border: 1px solid transparent;
  color: var(--lilac);
  text-decoration: none;
  font-size: 14px;
  letter-spacing: .02em;
  white-space: nowrap;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), background-color var(--t) var(--ease);
}
.ra-nav__link:hover {
  color: var(--frost);
  border-color: var(--line);
  background: rgba(43, 17, 72, .55);
}
.ra-nav__link[aria-current="page"] {
  color: var(--gold-light);
  border-color: rgba(184, 137, 43, .5);
  background: linear-gradient(180deg, rgba(184, 137, 43, .16), rgba(184, 137, 43, 0));
}
.ra-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: -1px;
  bottom: -1px;
  width: 2px;
  background: var(--gold);
}
.ra-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: -1px;
  height: 1px;
  background: var(--gold);
}

.ra-nav__num {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .04em;
  color: var(--gold);
  opacity: .85;
}
.ra-nav__label { white-space: nowrap; }

/* 右侧状态区 */
.ra-header__meta {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-self: end;
}

.ra-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 10px;
  border: 1px solid rgba(53, 192, 141, .35);
  color: var(--jade);
  font-size: 12px;
  letter-spacing: .05em;
  white-space: nowrap;
}
.ra-status__lamp {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 3px rgba(53, 192, 141, .16);
  animation: ra-lamp 3.2s var(--ease) infinite;
}

@keyframes ra-lamp {
  0%, 82%, 100% { opacity: 1; }
  90% { opacity: .45; }
}

.ra-flag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--gold-light);
  border: 1px solid rgba(184, 137, 43, .5);
  padding: 5px 9px;
  white-space: nowrap;
}

.ra-call {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--frost);
  text-decoration: none;
  border-bottom: 1px solid rgba(184, 137, 43, .55);
  padding: 4px 2px;
  white-space: nowrap;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}
.ra-call:hover { color: var(--gold-light); border-bottom-color: var(--gold-light); }
.ra-call__label {
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--gold);
}

/* 移动端按钮 */
.ra-nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  background: rgba(27, 12, 51, .75);
  border: 1px solid var(--line);
  color: var(--frost);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease);
}
.ra-nav-toggle[aria-expanded="true"] {
  border-color: var(--gold);
  color: var(--gold-light);
}
.ra-nav-toggle__bar {
  position: relative;
  display: block;
  width: 16px;
  height: 1px;
  background: currentColor;
  box-shadow: 0 -5px 0 currentColor, 0 5px 0 currentColor;
}
.ra-nav-toggle[aria-expanded="true"] .ra-nav-toggle__bar {
  background: transparent;
  box-shadow: none;
}
.ra-nav-toggle[aria-expanded="true"] .ra-nav-toggle__bar::before,
.ra-nav-toggle[aria-expanded="true"] .ra-nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 16px;
  height: 1px;
  background: currentColor;
}
.ra-nav-toggle[aria-expanded="true"] .ra-nav-toggle__bar::before { transform: rotate(45deg); }
.ra-nav-toggle[aria-expanded="true"] .ra-nav-toggle__bar::after { transform: rotate(-45deg); }

/* 常用入口聚合条 */
.ra-entries {
  border-top: 1px solid var(--line);
  background: linear-gradient(90deg, rgba(27, 12, 51, .9), rgba(7, 6, 11, .75) 60%, rgba(27, 12, 51, .9));
}

.ra-entries__inner {
  max-width: var(--shell-wide);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: 46px;
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}
.ra-entries__inner::-webkit-scrollbar { height: 4px; }
.ra-entries__inner::-webkit-scrollbar-thumb { background: var(--line); }

.ra-entries__tag {
  flex: 0 0 auto;
  padding-right: 12px;
  border-right: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--gold);
  white-space: nowrap;
}

.ra-entry {
  flex: 0 0 auto;
  padding: 5px 11px;
  border: 1px solid var(--line);
  background: rgba(7, 6, 11, .6);
  color: var(--lilac);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--t) var(--ease), background-color var(--t) var(--ease), border-color var(--t) var(--ease);
}
.ra-entry:hover {
  color: #150A24;
  background: linear-gradient(120deg, var(--gold-hot), var(--gold-light));
  border-color: var(--gold-light);
}

/* ---------- 8. 按钮 ---------- */
.ra-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 24px;
  border: 1px solid var(--gold);
  background: transparent;
  color: var(--frost);
  font-family: var(--font-sans);
  font-size: 15px;
  letter-spacing: .04em;
  text-decoration: none;
  cursor: pointer;
  transition: color var(--t) var(--ease), background-color var(--t) var(--ease), border-color var(--t) var(--ease), box-shadow var(--t) var(--ease), transform var(--t) var(--ease);
}

.ra-btn--gold {
  border-color: transparent;
  background: linear-gradient(120deg, var(--gold-hot), var(--gold-light));
  color: #150A24;
  font-weight: 700;
  box-shadow: 6px 6px 0 rgba(184, 137, 43, .22);
}
.ra-btn--gold:hover {
  box-shadow: 2px 2px 0 rgba(184, 137, 43, .45);
  transform: translate(2px, 2px);
}

.ra-btn--ghost:hover {
  border-color: var(--gold-light);
  color: var(--gold-light);
  background: rgba(184, 137, 43, .12);
}

/* ---------- 9. 面包屑 ---------- */
.ra-breadcrumb {
  padding: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--lilac);
}
.ra-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.ra-breadcrumb__link {
  color: var(--lilac);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}
.ra-breadcrumb__link:hover {
  color: var(--gold-light);
  border-bottom-color: var(--gold);
}
.ra-breadcrumb__sep { color: var(--line); }
.ra-breadcrumb__current { color: var(--frost); }

/* ---------- 10. 区域标记带 ---------- */
.ra-section-head {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: end;
  gap: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 34px;
}
.ra-section-head__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--gold);
}
.ra-section-head__title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.15;
}
.ra-section-head__status {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--lilac);
  text-align: right;
}

/* ---------- 11. 蓝图网格 ---------- */
.ra-grid { display: grid; gap: 28px; }
.ra-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.ra-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.ra-grid--3-7 { grid-template-columns: 3fr 7fr; }
.ra-grid--7-3 { grid-template-columns: 7fr 3fr; }

.ra-stack { display: grid; gap: 28px; }

/* ---------- 12. 层叠专题卡片 ---------- */
.ra-panel {
  position: relative;
  padding: 28px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--violet-deep), #0B0917);
  box-shadow: var(--hard-shadow);
  transition: border-color var(--t) var(--ease), background-color var(--t) var(--ease);
}
.ra-panel:hover { border-color: rgba(184, 137, 43, .55); }
.ra-panel--gold { border-color: rgba(184, 137, 43, .5); }
.ra-panel--shift-l { transform: translate(-12px, 0); }
.ra-panel--shift-r { transform: translate(12px, 0); }

.ra-panel__label {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--gold);
}
.ra-panel__title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(20px, 2.2vw, 27px);
  line-height: 1.25;
  margin-bottom: 10px;
}
.ra-panel__text {
  color: var(--lilac);
  font-size: 16px;
}

/* ---------- 13. 图片容器（供页面阶段放图） ---------- */
.ra-frame {
  position: relative;
  padding: 10px;
  border: 1px solid var(--line);
  background: #0B0917;
  transition: border-color var(--t) var(--ease);
}
.ra-frame:hover { border-color: rgba(184, 137, 43, .55); }
.ra-frame::before,
.ra-frame::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--gold);
  pointer-events: none;
}
.ra-frame::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.ra-frame::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.ra-frame__media {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 28%, rgba(75, 31, 134, .65), rgba(7, 6, 11, .95) 70%),
    linear-gradient(140deg, var(--violet-deep), var(--obsidian));
}
.ra-frame__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.06);
}

.ra-frame--tall .ra-frame__media { aspect-ratio: 4 / 5; }
.ra-frame--square .ra-frame__media { aspect-ratio: 1 / 1; }

.ra-frame__cap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 16px;
  padding: 10px 2px 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--lilac);
}

.ra-media-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* ---------- 14. 横向主题带 ---------- */
.ra-band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(90deg, var(--violet-deep), var(--royal-deep) 55%, var(--violet-deep));
  padding: 22px 0;
}
.ra-band__inner {
  display: flex;
  gap: 14px;
  align-items: center;
  max-width: var(--shell-wide);
  margin: 0 auto;
  padding: 0 var(--gutter);
  overflow-x: auto;
  scrollbar-width: thin;
}
.ra-band__inner::-webkit-scrollbar { height: 4px; }
.ra-band__inner::-webkit-scrollbar-thumb { background: var(--line); }

.ra-band__item {
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--lilac);
  white-space: nowrap;
  transition: border-color var(--t) var(--ease), color var(--t) var(--ease);
}
.ra-band__item:hover { border-color: var(--gold); color: var(--gold-light); }

/* ---------- 15. 刻度索引栏 ---------- */
.ra-index-rail {
  position: sticky;
  top: 140px;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--line);
}
.ra-index-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-left: -1px;
  padding: 9px 0 9px 14px;
  border-left: 2px solid transparent;
  color: var(--lilac);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), background-color var(--t) var(--ease);
}
.ra-index-rail__link:hover { color: var(--frost); }
.ra-index-rail__link.is-active {
  color: var(--gold-light);
  border-left-color: var(--gold);
  background: linear-gradient(90deg, rgba(184, 137, 43, .14), transparent);
}
.ra-index-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
}

/* ---------- 16. 步骤 / 标签页 ---------- */
.ra-stepper { display: grid; gap: 18px; }
.ra-stepper__nav,
.ra-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
}
.ra-tabs { display: grid; gap: 0; }

.ra-stepper__tab,
.ra-tabs__tab {
  padding: 10px 16px;
  border: 1px solid var(--line);
  background: rgba(7, 6, 11, .5);
  color: var(--lilac);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  cursor: pointer;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), background-color var(--t) var(--ease);
}
.ra-stepper__tab:hover,
.ra-tabs__tab:hover { color: var(--frost); border-color: var(--royal); }

.ra-stepper__tab[aria-selected="true"],
.ra-tabs__tab[aria-selected="true"] {
  color: #150A24;
  border-color: var(--gold-light);
  background: linear-gradient(120deg, var(--gold-hot), var(--gold-light));
}

.ra-stepper__panel,
.ra-tabs__panel {
  margin-top: 18px;
  padding: 26px;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(27, 12, 51, .8), rgba(7, 6, 11, .6));
  color: var(--lilac);
}
.ra-stepper__panel[hidden],
.ra-tabs__panel[hidden] { display: none; }

/* ---------- 17. 复制入口按钮 ---------- */
.ra-copy {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: rgba(7, 6, 11, .6);
  color: var(--lilac);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  cursor: pointer;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease), background-color var(--t) var(--ease);
}
.ra-copy:hover { color: var(--gold-light); border-color: var(--gold); }
.ra-copy.is-done {
  color: var(--jade);
  border-color: rgba(53, 192, 141, .55);
  background: rgba(53, 192, 141, .10);
}

/* ---------- 18. 页脚 ---------- */
.ra-footer {
  position: relative;
  margin-top: 96px;
  border-top: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(27, 12, 51, .85), rgba(7, 6, 11, .98)),
    linear-gradient(rgba(58, 51, 80, .18) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(90deg, rgba(58, 51, 80, .18) 1px, transparent 1px) 0 0 / 24px 24px;
}
.ra-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 140px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold-hot), rgba(232, 184, 75, 0));
}

.ra-footer__inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.ra-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
  gap: 36px 32px;
  padding: 60px 0 36px;
}

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

.ra-footer__mark {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.ra-footer__crest {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  border: 1px solid var(--gold);
  box-shadow: inset 0 0 0 3px var(--obsidian), inset 0 0 0 4px rgba(184, 137, 43, .45);
  background: linear-gradient(140deg, var(--royal-deep), var(--violet-deep));
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 16px;
  color: var(--gold-light);
}
.ra-footer__name {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 19px;
  letter-spacing: .02em;
}

.ra-footer__lead {
  color: var(--lilac);
  font-size: 15px;
  max-width: 34ch;
  margin-bottom: 12px;
}

.ra-footer__note {
  color: var(--lilac);
  font-size: 13px;
  line-height: 1.7;
  max-width: 36ch;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.ra-totop {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: rgba(7, 6, 11, .6);
  color: var(--lilac);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  cursor: pointer;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}
.ra-totop:hover { color: var(--gold-light); border-color: var(--gold); }

.ra-footer__title {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--gold);
  text-transform: uppercase;
}
.ra-footer__idx { color: var(--lilac); }

.ra-footer__list { display: grid; gap: 9px; }

.ra-footer__link {
  display: inline-block;
  color: var(--lilac);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}
.ra-footer__link:hover {
  color: var(--gold-light);
  border-bottom-color: var(--gold);
}

.ra-footer__list--contact { gap: 12px; }
.ra-footer__item {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
}
.ra-footer__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gold);
}
.ra-footer__val {
  color: var(--frost);
  overflow-wrap: anywhere;
}

.ra-footer__cta { margin-top: 20px; }

.ra-footer__meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  padding: 20px 0 28px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--lilac);
}
.ra-footer__legal { color: var(--frost); }
.ra-footer__copy { color: var(--lilac); }

/* ---------- 19. 响应式 ---------- */
@media (max-width: 1180px) {
  .ra-flag { display: none; }
  .ra-nav__link { padding: 10px 9px; font-size: 13px; }
  .ra-brand__coord { display: none; }
}

@media (max-width: 1023px) {
  .ra-nav-toggle { display: inline-flex; }

  .ra-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    justify-self: stretch;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    padding: 10px var(--gutter) 22px;
    background: rgba(7, 6, 11, .98);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 0 rgba(3, 3, 7, .6);
  }
  .ra-nav[data-open] { display: block; }

  .ra-nav__list {
    flex-direction: column;
    gap: 0;
  }
  .ra-nav__item { display: block; }
  .ra-nav__link {
    justify-content: flex-start;
    gap: 14px;
    width: 100%;
    padding: 15px 4px;
    border: 0;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
    background: none;
  }
  .ra-nav__link:hover { background: rgba(43, 17, 72, .6); }
  .ra-nav__link[aria-current="page"] { background: linear-gradient(90deg, rgba(184, 137, 43, .16), transparent); }
  .ra-nav__link[aria-current="page"]::after { display: none; }
  .ra-nav__num { font-size: 11px; }
}

@media (max-width: 899px) {
  .ra-grid--2,
  .ra-grid--3,
  .ra-grid--3-7,
  .ra-grid--7-3 { grid-template-columns: minmax(0, 1fr); }

  .ra-footer__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 24px;
    padding: 44px 0 28px;
  }
  .ra-footer__col--brand { grid-column: 1 / -1; }
  .ra-index-rail { position: static; }
}

@media (max-width: 760px) {
  body { font-size: 16px; }

  .ra-status { display: none; }
  .ra-header__bar { min-height: 66px; gap: 12px; }
  .ra-call { font-size: 11px; }
  .ra-call__label { display: none; }

  .ra-panel { padding: 22px; }
  .ra-panel--shift-l,
  .ra-panel--shift-r { transform: none; }

  .ra-section { padding: 52px 0; }
  .ra-section-head {
    grid-template-columns: auto 1fr;
    gap: 12px;
  }
  .ra-section-head__status {
    grid-column: 1 / -1;
    text-align: left;
  }

  .ra-footer { margin-top: 64px; }
  .ra-footer__grid { grid-template-columns: minmax(0, 1fr); }
  .ra-stepper__panel,
  .ra-tabs__panel { padding: 20px; }
}

@media (max-width: 420px) {
  .ra-brand__latin { letter-spacing: .2em; }
  .ra-brand__name { font-size: 19px; }
  .ra-nav-toggle__text { display: none; }
  .ra-entries__tag { letter-spacing: .1em; }
}

/* ---------- 20. 减弱动效 ---------- */
@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;
  }
}