/* ============================================================
   星空赛场 · 共享样式 /assets/site.css
   深空蓝底盘 + 星轨侧栏 + Bento 索引
   ============================================================ */

:root {
  --ink-0: #0B1B3A;
  --ink-1: #142A55;
  --ink-2: #1F3A6E;
  --nebula: #6C4AB6;
  --cyan: #00E5FF;
  --orange: #FF8A3D;
  --moon: #F4F7FF;
  --dust: #9AA9C7;
  --green: #2BD9A6;
  --red: #E5484D;

  --rail-w: 104px;
  --rail-w-open: 212px;

  --font-display: "Exo 2", system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-num: "Exo 2", ui-monospace, "SFMono-Regular", "Cascadia Mono", monospace;

  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --line: 1px solid var(--ink-2);
}

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

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

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

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

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

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

/* ---------- 基础排版 ---------- */
body {
  min-height: 100vh;
  padding-left: var(--rail-w);
  background-color: var(--ink-0);
  background-image:
    radial-gradient(ellipse 70% 46% at 88% -8%, rgba(108, 74, 182, 0.30), transparent 70%),
    radial-gradient(ellipse 58% 40% at 4% 108%, rgba(0, 229, 255, 0.10), transparent 70%);
  background-attachment: fixed;
  color: var(--moon);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0.01em;
}

h1 { font-size: clamp(30px, 3.6vw, 40px); }
h2 { font-size: clamp(22px, 2.4vw, 28px); }
h3 { font-size: 20px; line-height: 1.3; }

.display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.01em;
}

.muted { color: var(--dust); }

.num {
  font-family: var(--font-num);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.num--orange { color: var(--orange); }

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

/* ---------- skip link ---------- */
.skip-link {
  position: fixed;
  top: 0;
  left: 50%;
  z-index: 200;
  transform: translate(-50%, -140%);
  padding: 10px 18px;
  border-radius: 0 0 8px 8px;
  background: var(--orange);
  color: var(--ink-0);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: transform 160ms var(--ease);
}

.skip-link:focus { transform: translate(-50%, 0); }

/* ============================================================
   侧边星轨导航
   ============================================================ */
.site-rail {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 90;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 20px 10px 18px;
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-width: thin;
  border-right: var(--line);
  background-color: var(--ink-0);
  background-image:
    radial-gradient(1px 1px at 22px 44px, rgba(0, 229, 255, 0.75), transparent 100%),
    radial-gradient(1.4px 1.4px at 76px 142px, rgba(244, 247, 255, 0.55), transparent 100%),
    radial-gradient(1px 1px at 34px 252px, rgba(108, 74, 182, 0.95), transparent 100%),
    radial-gradient(1.6px 1.6px at 80px 366px, rgba(0, 229, 255, 0.45), transparent 100%),
    radial-gradient(1px 1px at 26px 486px, rgba(244, 247, 255, 0.40), transparent 100%),
    radial-gradient(1.2px 1.2px at 62px 604px, rgba(255, 138, 61, 0.55), transparent 100%),
    linear-gradient(180deg, #0B1B3A 0%, #091530 62%, #0B1B3A 100%);
  transition: width 220ms var(--ease), box-shadow 220ms var(--ease);
}

.rail-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 120;
  width: 3px;
  height: 100vh;
  pointer-events: none;
}

.rail-progress::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--cyan), var(--nebula) 78%, var(--orange));
  transform: scaleY(var(--scroll-progress, 0));
  transform-origin: top center;
  transition: transform 100ms linear;
}

/* 品牌 */
.rail-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.brand-mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  line-height: 1.15;
  letter-spacing: 0.06em;
  color: var(--moon);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--cyan);
}

.brand-tag {
  max-width: 84px;
  font-size: 10px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--dust);
}

/* 移动按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 13px;
  border: var(--line);
  border-radius: 999px;
  background: var(--ink-1);
  color: var(--moon);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--cyan);
  background: rgba(0, 229, 255, 0.12);
}

.nav-toggle-bars {
  position: relative;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: background-color 180ms var(--ease);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform 200ms var(--ease);
}

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

.site-rail[data-open="true"] .nav-toggle-bars { background: transparent; }
.site-rail[data-open="true"] .nav-toggle-bars::before { transform: translateY(5px) rotate(45deg); }
.site-rail[data-open="true"] .nav-toggle-bars::after { transform: translateY(-5px) rotate(-45deg); }

/* 导航 */
.rail-nav {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

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

.nav-link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 9px 4px 11px;
  border-radius: 8px;
  color: var(--dust);
  transition: color 180ms var(--ease), background-color 180ms var(--ease);
}

.nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 2px;
  height: 0;
  border-radius: 2px;
  background: var(--cyan);
  transform: translateY(-50%);
  transition: height 200ms var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--moon);
  background: rgba(31, 58, 110, 0.55);
}

.nav-link:hover::before,
.nav-link:focus-visible::before { height: 58%; }

.nav-link[aria-current="page"] {
  color: var(--moon);
  background: rgba(0, 229, 255, 0.09);
}

.nav-link[aria-current="page"]::before {
  height: 74%;
  background: var(--cyan);
}

.nav-idx {
  font-family: var(--font-num);
  font-size: 9px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.14em;
  color: var(--nebula);
  transition: color 180ms var(--ease);
}

.nav-link:hover .nav-idx,
.nav-link:focus-visible .nav-idx,
.nav-link[aria-current="page"] .nav-idx { color: var(--cyan); }

.nav-label {
  font-size: 12px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.12em;
  writing-mode: vertical-rl;
  text-orientation: upright;
}

/* 星标快捷入口 */
.rail-quick {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 12px;
  border-top: var(--line);
}

.rail-quick-title {
  font-family: var(--font-num);
  font-size: 9px;
  letter-spacing: 0.16em;
  text-align: center;
  color: var(--nebula);
}

.quick-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.quick-link {
  display: block;
  padding: 6px 2px;
  border: var(--line);
  border-radius: 6px;
  text-align: center;
  font-size: 11px;
  font-weight: 500;
  color: var(--dust);
  transition: color 180ms var(--ease), background-color 180ms var(--ease), border-color 180ms var(--ease);
}

.quick-link:hover,
.quick-link:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-0);
  font-weight: 700;
}

/* 侧栏尾部 */
.rail-foot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 9px;
  padding-top: 4px;
}

.rail-coord {
  font-family: var(--font-num);
  font-size: 9px;
  letter-spacing: 0.06em;
  color: #5A6E93;
}

.rail-cta {
  display: block;
  width: 100%;
  padding: 9px 4px;
  border-radius: 8px;
  background: var(--orange);
  color: var(--ink-0);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-align: center;
  transition: filter 180ms var(--ease), transform 180ms var(--ease);
}

.rail-cta:hover,
.rail-cta:focus-visible {
  filter: brightness(1.08);
  transform: translateY(-2px);
}

/* 桌面悬停/聚焦展开 */
@media (min-width: 1024px) {
  .site-rail:hover,
  .site-rail:focus-within {
    width: var(--rail-w-open);
    box-shadow: 28px 0 56px -30px rgba(0, 0, 0, 0.9);
  }

  .site-rail:hover .nav-label,
  .site-rail:focus-within .nav-label {
    writing-mode: horizontal-tb;
    letter-spacing: 0.06em;
    font-size: 14px;
  }

  .site-rail:hover .nav-link,
  .site-rail:focus-within .nav-link {
    flex-direction: row;
    justify-content: flex-start;
    gap: 14px;
    padding: 11px 12px 11px 16px;
  }

  .site-rail:hover .nav-idx,
  .site-rail:focus-within .nav-idx { font-size: 11px; }
}

/* ============================================================
   页脚
   ============================================================ */
.site-foot {
  position: relative;
  padding: 56px 28px 30px;
  border-top: var(--line);
  background-color: var(--ink-1);
  background-image:
    radial-gradient(ellipse 55% 100% at 92% 0%, rgba(108, 74, 182, 0.28), transparent 70%),
    radial-gradient(ellipse 45% 90% at 0% 100%, rgba(0, 229, 255, 0.08), transparent 70%);
}

.site-foot::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--nebula) 48%, var(--orange));
  opacity: 0.8;
}

.foot-grid {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(220px, 1.5fr) repeat(2, minmax(130px, 0.7fr)) minmax(250px, 1.3fr);
  gap: 40px 32px;
}

.foot-mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: 0.06em;
  color: var(--moon);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--cyan);
  display: inline-block;
}

.foot-line {
  margin-top: 14px;
  max-width: 280px;
  font-size: 13px;
  line-height: 1.75;
  color: #C7D3EA;
}

.foot-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--dust);
}

.foot-title::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.foot-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.foot-list a {
  font-size: 14px;
  color: #C7D3EA;
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.foot-list a:hover,
.foot-list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.foot-meta {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 10px;
  font-size: 13px;
  line-height: 1.65;
  color: #C7D3EA;
  word-break: break-word;
}

.foot-meta + .foot-meta { margin-top: 9px; }

.foot-key {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--dust);
  padding-top: 2px;
}

.foot-note {
  margin-top: 14px;
  padding-left: 12px;
  border-left: 2px solid var(--nebula);
  font-size: 12px;
  line-height: 1.75;
  color: var(--dust);
}

.foot-brand .foot-note { border-left-color: var(--ink-2); }

.foot-bar {
  max-width: 1320px;
  margin: 44px auto 0;
  padding-top: 20px;
  border-top: 1px solid rgba(31, 58, 110, 0.9);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 26px;
  font-size: 12px;
  color: var(--dust);
}

.foot-copy { letter-spacing: 0.04em; }

.foot-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.foot-legal a {
  color: var(--dust);
  transition: color 180ms var(--ease);
}

.foot-legal a:hover,
.foot-legal a:focus-visible { color: var(--cyan); }

.foot-icp {
  font-family: var(--font-num);
  letter-spacing: 0.08em;
  color: #5A6E93;
}

/* ============================================================
   通用页面件
   ============================================================ */
#main-content {
  display: block;
  min-height: 60vh;
  scroll-margin-top: 80px;
}

.page-wrap {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding: 30px 28px 88px;
}

/* 面包屑 */
.crumbs { font-size: 12px; color: var(--dust); }

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.crumbs li { display: inline-flex; align-items: center; }

.crumbs li:not(:first-child)::before {
  content: "/";
  margin: 0 8px;
  color: #41567F;
}

.crumbs a {
  color: var(--dust);
  transition: color 180ms var(--ease);
}

.crumbs a:hover,
.crumbs a:focus-visible { color: var(--cyan); }

.crumbs [aria-current="page"] { color: var(--moon); font-weight: 500; }

/* Bento 网格 */
.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 16px;
}

.span-1 { grid-column: span 1; }
.span-2 { grid-column: span 2; }
.span-3 { grid-column: span 3; }
.span-4 { grid-column: span 4; }
.span-5 { grid-column: span 5; }
.span-6 { grid-column: span 6; }
.span-7 { grid-column: span 7; }
.span-8 { grid-column: span 8; }
.span-9 { grid-column: span 9; }
.span-10 { grid-column: span 10; }
.span-11 { grid-column: span 11; }
.span-12 { grid-column: span 12; }

/* 卡片 */
.card {
  position: relative;
  padding: 20px;
  border: 1px solid var(--ink-2);
  border-radius: 10px;
  background: var(--ink-1);
  transition:
    transform 200ms var(--ease),
    border-color 200ms var(--ease),
    box-shadow 200ms var(--ease),
    background-color 200ms var(--ease);
}

.card:hover,
.card:focus-within {
  transform: translateY(-3px);
  border-color: var(--cyan);
  box-shadow: 0 18px 38px -24px rgba(0, 229, 255, 0.65);
}

.card--flat:hover,
.card--flat:focus-within {
  transform: none;
  border-color: var(--ink-2);
  box-shadow: none;
}

.card--paper {
  background: var(--moon);
  border-color: #D5DEF0;
  color: var(--ink-0);
}

.card--paper:hover,
.card--paper:focus-within {
  border-color: var(--nebula);
  box-shadow: 0 18px 38px -26px rgba(11, 27, 58, 0.7);
}

.card--paper .muted { color: #5B6B8C; }

.card-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

.card-body {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--dust);
}

.card--paper .card-body { color: #46567A; }

/* 栏目标签与区块标题 */
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.kicker::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 18px;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: var(--line);
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 700;
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border: 1px solid rgba(108, 74, 182, 0.65);
  border-radius: 4px;
  background: rgba(108, 74, 182, 0.26);
  color: #D9CCF7;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.6;
}

.tag--cyan {
  background: rgba(0, 229, 255, 0.12);
  border-color: rgba(0, 229, 255, 0.45);
  color: var(--cyan);
}

.tag--orange {
  background: rgba(255, 138, 61, 0.14);
  border-color: rgba(255, 138, 61, 0.5);
  color: #FFB583;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  transition:
    transform 180ms var(--ease),
    background-color 180ms var(--ease),
    color 180ms var(--ease),
    border-color 180ms var(--ease);
}

.btn--primary {
  background: var(--orange);
  color: var(--ink-0);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: #FFA05E;
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: var(--ink-2);
  background: rgba(0, 229, 255, 0.06);
  color: var(--cyan);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--cyan);
  background: rgba(0, 229, 255, 0.15);
  transform: translateY(-2px);
}

/* 图例 */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
  padding: 14px 16px;
  border: 1px dashed var(--ink-2);
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--dust);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.legend-swatch {
  width: 16px;
  height: 3px;
  border-radius: 2px;
  background: var(--cyan);
}

.legend-swatch--purple { background: var(--nebula); }
.legend-swatch--orange { background: var(--orange); }
.legend-swatch--green { background: var(--green); }

/* 正文 */
.prose {
  max-width: 72ch;
  font-size: 16px;
  line-height: 1.85;
  color: #D6DEEC;
}

.prose p + p { margin-top: 1em; }
.prose h2 { margin: 1.6em 0 0.6em; }
.prose h3 { margin: 1.4em 0 0.5em; }
.prose a { color: var(--cyan); border-bottom: 1px solid rgba(0, 229, 255, 0.4); }
.prose a:hover { border-bottom-color: var(--cyan); }
.prose ul, .prose ol { margin: 1em 0; padding-left: 1.2em; list-style: disc; }
.prose ol { list-style: decimal; }
.prose li + li { margin-top: 0.4em; }

/* 表格 */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.45;
  font-variant-numeric: tabular-nums;
}

.data-table caption {
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-align: left;
  color: var(--dust);
}

.data-table th,
.data-table td {
  padding: 10px 12px;
  text-align: left;
  border-bottom: 1px solid var(--ink-2);
}

.data-table th {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--dust);
}

.data-table tbody tr:hover { background: rgba(31, 58, 110, 0.45); }

.card--paper .data-table th,
.card--paper .data-table td { border-bottom-color: #DCE3F1; }
.card--paper .data-table th { color: #5B6B8C; }
.card--paper .data-table tbody tr:hover { background: #E9EEF9; }

/* 强调色带 */
.band {
  padding: 18px 22px;
  border-left: 3px solid var(--nebula);
  border-radius: 0 10px 10px 0;
  background: linear-gradient(120deg, rgba(108, 74, 182, 0.34), rgba(11, 27, 58, 0) 62%);
}

/* 图片容器 */
.media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--ink-2);
  border-radius: 10px;
  background-color: var(--ink-1);
  background-image:
    radial-gradient(ellipse 65% 70% at 78% 18%, rgba(0, 229, 255, 0.22), transparent 62%),
    radial-gradient(ellipse 70% 80% at 12% 96%, rgba(108, 74, 182, 0.45), transparent 68%),
    linear-gradient(158deg, #142A55 0%, #0B1B3A 100%);
}

.media::before {
  content: "";
  position: absolute;
  inset: -20% -10%;
  background: linear-gradient(112deg, transparent 38%, rgba(0, 229, 255, 0.16) 47%, transparent 56%);
  pointer-events: none;
}

.media > img,
.media > picture,
.media > video,
.media > svg {
  position: relative;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--wide { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }

/* 分隔线 */
.divider {
  height: 1px;
  margin: 28px 0;
  border: 0;
  background: linear-gradient(90deg, var(--ink-2), transparent 82%);
}

/* 显现 */
body[data-reveal-ready] [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 420ms var(--ease) var(--reveal-delay, 0ms),
    transform 420ms var(--ease) var(--reveal-delay, 0ms);
}

body[data-reveal-ready] [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1023px) {
  :root { --rail-w: 0px; }

  body {
    padding-left: 0;
    background-attachment: scroll;
  }

  .site-rail {
    position: sticky;
    inset: 0 0 auto 0;
    width: 100%;
    height: 64px;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 0 16px;
    overflow: visible;
    border-right: 0;
    border-bottom: var(--line);
    background-image: linear-gradient(180deg, #0B1B3A, #091530);
  }

  .rail-progress { display: none; }

  .rail-head {
    flex-direction: row;
    align-items: center;
    gap: 10px;
  }

  .brand {
    flex-direction: row;
    align-items: center;
    gap: 0;
  }

  .brand-mark {
    font-size: 16px;
    padding-bottom: 4px;
    border-bottom-width: 2px;
  }

  .brand-tag { display: none; }

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

  .rail-nav {
    position: fixed;
    inset: 64px 0 0 0;
    display: block;
    padding: 18px 20px 48px;
    overflow-y: auto;
    background: var(--ink-0);
    background-image: radial-gradient(ellipse 80% 50% at 90% 0%, rgba(108, 74, 182, 0.28), transparent 70%);
    border-top: var(--line);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition:
      opacity 200ms var(--ease),
      transform 200ms var(--ease),
      visibility 200ms linear;
  }

  .site-rail[data-open="true"] .rail-nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav-list { gap: 2px; }

  .nav-link {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 16px;
    padding: 15px 12px;
    border-radius: 0;
    border-bottom: 1px solid rgba(31, 58, 110, 0.7);
  }

  .nav-link::before { left: -4px; }
  .nav-link:hover::before,
  .nav-link:focus-visible::before { height: 46%; }
  .nav-link[aria-current="page"]::before { height: 56%; }

  .nav-idx { font-size: 11px; }

  .nav-label {
    writing-mode: horizontal-tb;
    font-size: 15px;
    letter-spacing: 0.06em;
  }

  .rail-quick,
  .rail-foot { display: none; }

  .page-wrap { padding: 22px 18px 64px; }

  .bento {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 12px;
  }

  .span-1, .span-2, .span-3 { grid-column: span 3; }
  .span-4, .span-5, .span-6,
  .span-7, .span-8, .span-9,
  .span-10, .span-11, .span-12 { grid-column: span 6; }

  .foot-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px 24px;
  }

  .foot-brand { grid-column: 1 / -1; }
  .foot-contact { grid-column: 1 / -1; }

  .site-foot { padding: 44px 20px 26px; }

  .foot-bar { margin-top: 32px; }
}

@media (max-width: 640px) {
  .bento { grid-template-columns: 1fr; }
  .bento > * { grid-column: auto; }

  .card { padding: 16px; }

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

  .foot-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .foot-mark { font-size: 20px; }

  .section-head { flex-direction: column; align-items: flex-start; }
}

/* ============================================================
   动效降级
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .site-rail { transition: none; }
  .rail-progress::after { transition: none; }

  .card:hover,
  .card:focus-within,
  .btn:hover,
  .btn:focus-visible,
  .rail-cta:hover,
  .rail-cta:focus-visible { transform: none; }

  body[data-reveal-ready] [data-reveal],
  body[data-reveal-ready] [data-reveal].is-revealed {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}