/* ==========================================================================
   云开赛场 · 共享样式表 /assets/site.css
   侧边轨道 + 纸白正文 + 运动信息色谱
   ========================================================================== */

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

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

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

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

[hidden] { display: none !important; }

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

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

/* ---------- 变量 ---------- */
:root {
  --turf: #1E7A4C;
  --turf-deep: #0E3B29;
  --turf-ink: #125C39;
  --flood: #FF7A1A;
  --flood-soft: #FFC08A;
  --card-red: #D2321E;
  --card-amber: #E8B21C;
  --night: #0B1F3A;
  --paper: #F7F5F0;
  --tactic: #5B6A72;
  --glass: rgba(255, 255, 255, 0.14);
  --line: rgba(11, 31, 58, 0.14);
  --line-soft: rgba(11, 31, 58, 0.08);
  --on-deep: rgba(247, 245, 240, 0.78);

  --rail-w: 96px;
  --gutter: clamp(20px, 3.4vw, 56px);
  --gap: 24px;
  --radius: 2px;
  --ease: cubic-bezier(0.2, 0.7, 0.3, 1);
  --dur: 180ms;

  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, "Noto Sans Mono", monospace;
}

/* ---------- 中文排版 ---------- */
body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  color: var(--night);
  background: var(--paper);
  padding-left: var(--rail-w);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

@media (min-width: 1024px) {
  body { font-size: 17px; }
}

p, li { word-break: break-word; }

h1, h2, h3, h4 {
  font-weight: 800;
  font-stretch: condensed;
  color: var(--night);
}

a { color: var(--turf); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--turf-ink); }

:focus-visible {
  outline: 2px solid var(--flood);
  outline-offset: 3px;
  border-radius: 1px;
}

.num, time, .stat__num, .rail__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

::selection { background: var(--flood-soft); color: var(--night); }

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  transform: translateY(-160%);
  padding: 10px 18px;
  background: var(--flood);
  color: var(--night);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  border-radius: var(--radius);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translateY(0); color: var(--night); }

/* ==========================================================================
   头部：左侧品牌轨道
   ========================================================================== */
.site-head { position: relative; z-index: 60; }

.rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  padding: 16px 0 14px;
  background: var(--turf-deep);
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--paper);
  overflow-y: auto;
  overscroll-behavior: contain;
  z-index: 60;
  scrollbar-width: none;
}
.rail::-webkit-scrollbar { width: 0; height: 0; }

.rail__progress {
  position: absolute;
  top: 0;
  right: 0;
  width: 2px;
  height: 100%;
  background: var(--flood);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 120ms linear;
}

/* 品牌 */
.rail__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 0 8px 14px;
}

.rail__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: var(--turf);
  color: var(--paper);
  font-size: 20px;
  font-weight: 800;
  text-decoration: none;
  border-radius: var(--radius);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.rail__mark:hover { background: var(--flood); color: var(--night); }

.rail__wordmark {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--flood-soft);
}

/* 主栏目 */
.rail__nav { padding: 8px 0 0; }

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

.rail__link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 4px;
  color: rgba(247, 245, 240, 0.7);
  text-decoration: none;
  font-size: 12px;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.rail__link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  background: var(--flood);
  transform: translateY(-50%);
  transition: height var(--dur) var(--ease);
}

.rail__num {
  font-size: 10px;
  letter-spacing: 0.06em;
  color: rgba(255, 192, 138, 0.62);
}

.rail__text {
  writing-mode: vertical-rl;
  text-orientation: upright;
  letter-spacing: 0.14em;
  line-height: 1.1;
}

.rail__link:hover {
  color: var(--paper);
  background: var(--glass);
}
.rail__link:hover::before { height: 58%; }

.rail__link[aria-current="page"] {
  color: var(--paper);
  background: linear-gradient(90deg, rgba(255, 122, 26, 0.2), rgba(255, 122, 26, 0));
}
.rail__link[aria-current="page"]::before { height: 100%; }
.rail__link[aria-current="page"] .rail__num { color: var(--flood); }

/* 快捷路径 */
.rail__quick {
  margin-top: 14px;
  padding: 12px 10px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.rail__quick-title {
  margin-bottom: 8px;
  text-align: center;
  font-size: 10px;
  letter-spacing: 0.24em;
  color: rgba(255, 192, 138, 0.72);
}

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

.quick-chip {
  display: block;
  padding: 7px 6px;
  font-size: 11px;
  line-height: 1.35;
  text-align: center;
  text-decoration: none;
  color: rgba(247, 245, 240, 0.82);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.quick-chip:hover {
  color: var(--paper);
  background: var(--glass);
  border-color: var(--flood);
}

/* 搜索入口 */
.rail__foot {
  margin-top: auto;
  padding: 16px 10px 0;
}

.rail__finder-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  width: 100%;
  padding: 10px 4px;
  background: transparent;
  border: 1px solid rgba(255, 122, 26, 0.5);
  border-radius: var(--radius);
  color: var(--flood-soft);
  font-size: 11px;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.rail__finder-btn:hover,
.rail__finder-btn[aria-expanded="true"] {
  background: var(--flood);
  border-color: var(--flood);
  color: var(--night);
}
.rail__finder-icon { font-size: 15px; line-height: 1; }

/* 搜索面板 */
.rail-finder {
  position: absolute;
  left: calc(100% + 10px);
  bottom: 16px;
  width: 300px;
  padding: 16px;
  background: #ffffff;
  color: var(--night);
  border: 1px solid var(--line);
  border-left: 3px solid var(--flood);
  border-radius: var(--radius);
  box-shadow: 0 18px 40px rgba(11, 31, 58, 0.22);
  z-index: 65;
}

.rail-finder__hint {
  font-size: 12px;
  color: var(--tactic);
  letter-spacing: 0.02em;
}

.rail-finder__input {
  width: 100%;
  margin-top: 10px;
  padding: 9px 12px;
  font-size: 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.rail-finder__input:focus-visible { outline: 2px solid var(--flood); outline-offset: 1px; }

.rail-finder__status {
  margin-top: 8px;
  font-size: 12px;
  color: var(--turf);
  font-family: var(--font-mono);
}

.rail-finder__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 6px;
  max-height: 240px;
  overflow-y: auto;
}

.rail-finder__item {
  display: block;
  padding: 8px 10px;
  font-size: 14px;
  text-decoration: none;
  color: var(--night);
  border-left: 2px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.rail-finder__item:hover {
  background: rgba(30, 122, 76, 0.08);
  border-left-color: var(--turf);
  color: var(--turf-ink);
}

/* 移动端按钮与遮罩 */
.nav-toggle {
  display: none;
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 80;
  align-items: center;
  gap: 9px;
  padding: 9px 14px 9px 12px;
  background: var(--turf-deep);
  color: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  font-size: 13px;
  letter-spacing: 0.12em;
  cursor: pointer;
}

.nav-toggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
}
.nav-toggle__bars i {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--flood);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }

.rail-scrim {
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(11, 31, 58, 0.6);
  opacity: 0;
  visibility: hidden;
  transition: opacity 200ms var(--ease), visibility 200ms var(--ease);
}
.rail-scrim.is-on { opacity: 1; visibility: visible; }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-foot {
  position: relative;
  background: var(--turf-deep);
  color: var(--on-deep);
}

.site-foot__rule {
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--turf) 0%,
    var(--turf) 44%,
    var(--flood) 44%,
    var(--flood) 60%,
    var(--night) 60%,
    var(--night) 100%
  );
}

.site-foot__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1.7fr) minmax(0, 1.05fr);
  gap: clamp(28px, 4vw, 60px);
  padding-block: clamp(40px, 6vw, 76px) clamp(32px, 4vw, 56px);
}

.site-foot__logo {
  display: inline-block;
  font-size: clamp(24px, 2.4vw, 30px);
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--paper);
  text-decoration: none;
}
.site-foot__logo:hover { color: var(--flood-soft); }

.site-foot__summary {
  margin-top: 14px;
  max-width: 30em;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 245, 240, 0.72);
}

.site-foot__meta {
  margin-top: 12px;
  font-size: 13px;
  color: var(--flood-soft);
}

.site-foot__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.site-foot__col-title {
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.24em;
  color: var(--flood-soft);
}

.site-foot__links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.site-foot__links a {
  display: inline-block;
  font-size: 14px;
  color: rgba(247, 245, 240, 0.78);
  text-decoration: none;
  transition: color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.site-foot__links a:hover {
  color: var(--paper);
  transform: translateX(3px);
}

.site-foot__contact-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.site-foot__label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: rgba(247, 245, 240, 0.5);
  margin-bottom: 3px;
}

.site-foot__value {
  display: block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-all;
}

.site-foot__contact-list li .copy-btn { margin-top: 7px; }

.copy-btn {
  padding: 5px 12px;
  font-size: 12px;
  letter-spacing: 0.06em;
  background: transparent;
  color: var(--flood-soft);
  border: 1px solid rgba(255, 192, 138, 0.42);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.copy-btn:hover {
  background: var(--glass);
  border-color: var(--flood);
  color: var(--paper);
}
.copy-btn.is-done {
  background: var(--flood);
  border-color: var(--flood);
  color: var(--night);
}

.site-foot__note {
  margin-top: 16px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(247, 245, 240, 0.5);
}

.site-foot__base {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.site-foot__base-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  padding-block: 18px;
  font-size: 13px;
  color: rgba(247, 245, 240, 0.58);
}
.site-foot__icp { font-family: var(--font-mono); letter-spacing: 0.01em; }

/* 回到顶部 */
.to-top {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 70;
  padding: 11px 16px;
  font-size: 12px;
  letter-spacing: 0.12em;
  background: var(--night);
  color: var(--paper);
  border: 1px solid rgba(255, 122, 26, 0.6);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.to-top:hover { background: var(--flood); color: var(--night); border-color: var(--flood); }

/* ==========================================================================
   通用组件
   ========================================================================== */
.wrap {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(30px, 4vw, 56px); }
.section--paper { background: var(--paper); }
.section--night { background: var(--night); color: var(--paper); }
.section--night h1, .section--night h2, .section--night h3, .section--night h4 { color: var(--paper); }
.section--deep { background: var(--turf-deep); color: var(--paper); }
.section--deep h1, .section--deep h2, .section--deep h3, .section--deep h4 { color: var(--paper); }

.display-1 {
  font-size: clamp(40px, 6.4vw, 72px);
  line-height: 0.98;
  letter-spacing: -0.03em;
  font-weight: 800;
}
.display-2 {
  font-size: clamp(32px, 4.6vw, 56px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  font-weight: 800;
}
.display-3 {
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  font-weight: 700;
}
.display-4 {
  font-size: clamp(20px, 2vw, 30px);
  line-height: 1.2;
  font-weight: 700;
}

.lede {
  margin-top: 18px;
  max-width: 40em;
  font-size: 18px;
  line-height: 1.78;
  color: var(--tactic);
}
.section--night .lede, .section--deep .lede { color: rgba(247, 245, 240, 0.76); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--turf);
  font-family: var(--font-mono);
}
.section--night .eyebrow, .section--deep .eyebrow { color: var(--flood-soft); }

.rule {
  height: 1px;
  border: 0;
  background: var(--turf);
  opacity: 0.5;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn--primary { background: var(--turf); color: var(--paper); }
.btn--primary:hover { background: var(--turf-ink); color: var(--paper); }
.btn--accent { background: var(--flood); color: var(--night); }
.btn--accent:hover { background: var(--flood-soft); color: var(--night); }
.btn--ghost { background: transparent; border-color: currentColor; color: var(--turf); }
.btn--ghost:hover { background: rgba(30, 122, 76, 0.08); color: var(--turf-ink); }

/* 标签 */
.chip, .tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
  font-family: var(--font-mono);
}
.chip { background: rgba(30, 122, 76, 0.1); color: var(--turf-ink); }
.tag--turf { background: rgba(30, 122, 76, 0.14); color: var(--turf-ink); }
.tag--amber { background: rgba(232, 178, 28, 0.2); color: #7A5A00; }
.tag--red { background: rgba(210, 50, 30, 0.14); color: var(--card-red); }

/* 面包屑 */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--tactic);
}
.crumbs a { color: var(--tactic); text-decoration: none; }
.crumbs a:hover { color: var(--turf); }
.crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(91, 106, 114, 0.5);
}
.crumbs li { display: inline-flex; align-items: center; }

/* 栅格 */
.grid { display: grid; gap: var(--gap); }
.grid--8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
.grid--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* 卡片与旁注 */
.card {
  padding: clamp(18px, 2vw, 26px);
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.card:hover { border-color: rgba(30, 122, 76, 0.45); }

.card--glass {
  background: var(--glass);
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: var(--paper);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.card--glass:hover { background: rgba(255, 255, 255, 0.2); border-color: rgba(255, 122, 26, 0.55); }

.card--dark {
  background: var(--night);
  border-color: transparent;
  color: var(--paper);
}

.panel {
  padding-left: 18px;
  border-left: 2px solid var(--turf);
  font-size: 14px;
  line-height: 1.8;
  color: var(--tactic);
}
.section--night .panel, .section--deep .panel { color: rgba(247, 245, 240, 0.72); }

/* 目录索引型章节 */
.index-list { border-top: 1px solid var(--line); }
.index-list__item { border-bottom: 1px solid var(--line); }
.index-list__link {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 18px 4px;
  text-decoration: none;
  color: inherit;
  transition: background var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}
.index-list__link:hover {
  background: rgba(30, 122, 76, 0.06);
  padding-left: 14px;
}
.index-list__num {
  flex: none;
  font-size: 12px;
  color: var(--flood);
  font-family: var(--font-mono);
}
.index-list__body { min-width: 0; }
.index-list__title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.01em;
}
.index-list__desc {
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--tactic);
}
.section--night .index-list, .section--deep .index-list { border-top-color: rgba(255, 255, 255, 0.18); }
.section--night .index-list__item, .section--deep .index-list__item { border-bottom-color: rgba(255, 255, 255, 0.18); }
.section--night .index-list__desc, .section--deep .index-list__desc { color: rgba(247, 245, 240, 0.66); }

/* 数据块 */
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__num {
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1;
  font-weight: 700;
  color: var(--turf);
}
.section--night .stat__num, .section--deep .stat__num { color: var(--flood); }
.stat__label {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--tactic);
}
.section--night .stat__label, .section--deep .stat__label { color: rgba(247, 245, 240, 0.6); }

/* 横向主题带 */
.band {
  display: flex;
  gap: var(--gap);
  overflow-x: auto;
  padding-bottom: 14px;
  scroll-snap-type: x proximity;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
}
.band > * { flex: 0 0 auto; scroll-snap-align: start; }
.band::-webkit-scrollbar { height: 4px; }
.band::-webkit-scrollbar-thumb { background: rgba(30, 122, 76, 0.4); }

/* 图片容器 */
.media {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--turf-deep), var(--night));
}
.media > img,
.media > picture,
.media > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--turf);
}
.media--16x9 { aspect-ratio: 16 / 9; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media--3x4 { aspect-ratio: 3 / 4; }

/* 滚动显现 */
html[data-js] [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 220ms var(--ease), transform 220ms var(--ease);
}
html[data-js] [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1100px) {
  .site-foot__inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
  .site-foot__contact { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .grid--8-4, .grid--7-5, .grid--3 { grid-template-columns: minmax(0, 1fr); }
  .grid--2 { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 1023px) {
  :root { --rail-w: 0px; }

  .nav-toggle { display: inline-flex; }
  html.nav-open { overflow: hidden; }

  .rail {
    width: min(86vw, 340px);
    transform: translateX(-104%);
    transition: transform 220ms var(--ease);
    padding: 20px 0 18px;
    border-right: 1px solid rgba(255, 255, 255, 0.12);
  }
  .rail[data-open="true"] { transform: translateX(0); }

  .rail__progress { display: none; }

  .rail__brand {
    flex-direction: row;
    align-items: center;
    gap: 12px;
    padding: 0 20px 16px;
  }
  .rail__mark { width: 40px; height: 40px; font-size: 18px; }
  .rail__wordmark {
    writing-mode: horizontal-tb;
    text-orientation: mixed;
    font-size: 13px;
    letter-spacing: 0.24em;
  }

  .rail__nav { padding-top: 4px; }
  .rail__list { gap: 0; }
  .rail__link {
    flex-direction: row;
    justify-content: flex-start;
    gap: 14px;
    padding: 0 20px;
    min-height: 52px;
    font-size: 15px;
  }
  .rail__link::before {
    top: 0;
    transform: none;
  }
  .rail__link:hover::before,
  .rail__link[aria-current="page"]::before { height: 100%; }
  .rail__text {
    writing-mode: horizontal-tb;
    text-orientation: mixed;
    letter-spacing: 0.08em;
  }

  .rail__quick {
    padding: 16px 20px 0;
  }
  .rail__quick-title { text-align: left; }
  .rail__quick-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }
  .quick-chip { text-align: left; padding: 10px 12px; font-size: 12px; }

  .rail__foot { padding: 16px 20px 0; }
  .rail__finder-btn {
    flex-direction: row;
    justify-content: center;
    gap: 8px;
    height: 44px;
    font-size: 13px;
  }

  .rail-finder {
    position: static;
    width: auto;
    margin: 14px 20px 0;
    border-left: 1px solid var(--line);
    border-top: 3px solid var(--flood);
    box-shadow: none;
  }

  .site-foot__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .site-foot__inner { grid-template-columns: minmax(0, 1fr); }
  .site-foot__nav { grid-template-columns: minmax(0, 1fr); }
  .to-top { right: 14px; bottom: 16px; }
  .crumbs { font-size: 12px; }
}

@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;
  }
  html[data-js] [data-reveal] {
    opacity: 1;
    transform: none;
  }
}