/* ==========================================================================
   365棋牌局 · 共享样式表 (/assets/site.css)
   分区：1 重置 / 2 变量 / 3 排版 / 4 页头 / 5 页脚 / 6 通用组件 / 7 响应式
   ========================================================================== */

/* ---------- 1. 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; }
img, svg, video { max-width: 100%; display: block; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, p, figure, blockquote { margin: 0; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 色板 */
  --felt: #0E241E;
  --table: #14332A;
  --table-deep: #102B23;
  --moss: #1F4A3C;
  --copper: #C89B4A;
  --gold: #E6C078;
  --cinnabar: #B8452F;
  --paper: #F2EDE3;
  --sand: #E7DFCE;
  --stone: #8A8C86;
  --copper-deep: #6E5324;
  --ink: #0B1D18;

  /* 字体 */
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Noto Sans Mono CJK SC", monospace;

  /* 尺度 */
  --shell: 1280px;
  --gutter: clamp(16px, 4vw, 40px);
  --header-h: 72px;
  --r-sm: 10px;
  --r-md: 18px;
  --r-lg: 30px;
  --r-pill: 999px;
  --dur: 180ms;
  --ease: cubic-bezier(.22, .61, .36, 1);
  --z-header: 60;
}

/* ---------- 3. 排版与底色 ---------- */
body {
  background-color: var(--felt);
  background-image:
    radial-gradient(1100px 520px at 88% -8%, rgba(200, 155, 74, .14), transparent 62%),
    radial-gradient(760px 460px at -10% 24%, rgba(31, 74, 60, .55), transparent 70%),
    repeating-linear-gradient(0deg, rgba(31, 74, 60, .22) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(90deg, rgba(31, 74, 60, .14) 0 1px, transparent 1px 48px);
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 400;
  letter-spacing: 0;
  min-height: 100vh;
}

h1, h2, h3, h4 { font-weight: 900; line-height: 1.15; letter-spacing: -0.02em; color: var(--paper); }
h1 { font-size: clamp(44px, 7vw, 88px); line-height: 1.04; }
h2 { font-size: clamp(26px, 3.4vw, 38px); }
h3 { font-size: clamp(19px, 2vw, 23px); }
h4 { font-size: 17px; }
::selection { background: var(--copper); color: var(--ink); }

.shell {
  width: min(var(--shell), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}
#main-content { scroll-margin-top: calc(var(--header-h) + 16px); }
.page-main { display: block; padding-block: clamp(28px, 5vw, 64px); }

.lead { font-size: clamp(17px, 1.4vw, 19px); line-height: 1.8; color: var(--sand); max-width: 62ch; }
.mono { font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .08em; color: var(--stone); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.divider { height: 1px; border: 0; background: var(--moss); margin-block: clamp(24px, 4vw, 44px); }

.prose { max-width: 74ch; }
.prose p { margin-bottom: 1.05em; color: var(--sand); }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--gold); font-weight: 700; }
.prose ul { margin-bottom: 1.05em; }
.prose ul li { position: relative; padding-left: 20px; margin-bottom: .5em; color: var(--sand); }
.prose ul li::before {
  content: ""; position: absolute; left: 2px; top: .72em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--copper-deep);
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .18em;
  color: var(--copper); margin-bottom: 12px;
}
.eyebrow::before { content: ""; width: 22px; height: 1px; background: var(--copper); }

.section { padding-block: clamp(30px, 5vw, 64px); }
.section-head {
  display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between;
  gap: 16px; padding-bottom: 16px; margin-bottom: clamp(20px, 3vw, 32px);
  border-bottom: 1px solid var(--moss);
}

.crumbs {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em;
  color: var(--stone); margin-bottom: 20px;
}
.crumbs li { display: inline-flex; align-items: center; }
.crumbs li::after { content: "/"; margin-left: 8px; color: var(--copper-deep); }
.crumbs li:last-child::after { content: ""; margin: 0; }
.crumbs a { color: var(--sand); }
.crumbs a:hover { color: var(--gold); }
.crumbs [aria-current="page"] { color: var(--copper); }

/* ---------- 4. 页头 ---------- */
.skip-link {
  position: absolute; top: -100px; left: var(--gutter); z-index: 120;
  padding: 10px 18px; border-radius: 0 0 var(--r-sm) var(--r-sm);
  background: var(--copper); color: var(--ink); font-size: 14px; font-weight: 700;
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 0; }

.site-header {
  position: sticky; top: 0; z-index: var(--z-header);
  background: var(--table-deep);
  background: rgba(16, 43, 35, .94);
  -webkit-backdrop-filter: blur(12px) saturate(120%);
  backdrop-filter: blur(12px) saturate(120%);
  border-bottom: 1px solid var(--moss);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: clamp(14px, 2vw, 30px);
  min-height: var(--header-h); padding-block: 10px;
}

.brand-rail { display: flex; align-items: center; gap: clamp(12px, 1.8vw, 22px); min-width: 0; }
.brand {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 4px 6px 4px 4px; border-radius: var(--r-pill);
  transition: background var(--dur) var(--ease);
}
.brand:hover { background: rgba(200, 155, 74, .08); }
.brand-mark {
  flex: 0 0 36px; width: 36px; height: 36px; border-radius: 50%;
  display: grid; place-items: center;
  border: 1px solid var(--copper-deep);
  color: var(--copper);
  background: radial-gradient(circle at 30% 26%, rgba(230, 192, 120, .3), rgba(14, 36, 30, .92) 72%);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.brand:hover .brand-mark { border-color: var(--copper); color: var(--gold); }
.brand-mark svg { width: 18px; height: 18px; }
.brand-text { display: block; min-width: 0; }
.brand-name { display: block; font-size: 17px; font-weight: 900; letter-spacing: -0.02em; line-height: 1.25; color: var(--paper); }
.brand-sub { display: block; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .16em; color: var(--stone); line-height: 1.4; }
.brand--footer .brand-name { font-size: 20px; }

.rail-status {
  display: flex; align-items: center; gap: 8px;
  padding-left: clamp(12px, 1.6vw, 20px);
  border-left: 1px solid var(--moss);
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .1em;
  color: var(--stone); white-space: nowrap;
}
.status-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--cinnabar);
  box-shadow: 0 0 0 3px rgba(184, 69, 47, .2);
}
.rail-status-value { color: var(--copper); }

.nav-toggle {
  display: none; align-items: center; gap: 10px;
  padding: 9px 15px; border: 1px solid var(--moss); border-radius: var(--r-pill);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .12em; color: var(--sand);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--copper); color: var(--gold); background: rgba(200, 155, 74, .08); }
.nav-toggle-bars { position: relative; width: 16px; height: 2px; background: currentColor; border-radius: 2px; transition: background var(--dur) var(--ease); }
.nav-toggle-bars::before, .nav-toggle-bars::after {
  content: ""; position: absolute; left: 0; width: 16px; height: 2px;
  background: currentColor; border-radius: 2px;
  transition: transform var(--dur) var(--ease);
}
.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-5px) rotate(-45deg); }

.site-nav { display: flex; align-items: center; gap: clamp(12px, 1.8vw, 26px); }
.nav-list { display: flex; align-items: center; gap: clamp(6px, 1.1vw, 18px); }
.nav-link {
  position: relative; display: inline-flex; align-items: baseline; gap: 7px;
  padding: 8px 4px 8px 13px;
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .06em;
  color: var(--sand); white-space: nowrap;
  transition: color var(--dur) var(--ease);
}
.nav-index { font-size: 10px; letter-spacing: .1em; color: var(--copper-deep); transition: color var(--dur) var(--ease); }
.nav-label { display: inline-block; }
.nav-link::before {
  content: ""; position: absolute; left: 0; top: 50%; width: 5px; height: 5px;
  margin-top: -2.5px; border-radius: 50%; background: var(--cinnabar);
  opacity: 0; transform: scale(.5);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.nav-link::after {
  content: ""; position: absolute; left: 13px; right: 4px; bottom: 2px; height: 2px;
  background: var(--copper); border-radius: 2px;
  transform: scaleX(0); transform-origin: 0 50%;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-link:hover { color: var(--gold); }
.nav-link:hover .nav-index { color: var(--copper); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--gold); }
.nav-link[aria-current="page"] .nav-index { color: var(--copper); }
.nav-link[aria-current="page"]::before { opacity: 1; transform: scale(1); }
.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.nav-actions {
  display: flex; align-items: center; gap: 10px;
  padding-left: clamp(10px, 1.6vw, 22px);
  border-left: 1px solid var(--moss);
}

.scroll-progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; display: block; overflow: hidden; }
.scroll-progress-bar {
  display: block; width: 100%; height: 100%;
  transform: scaleX(0); transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--copper-deep), var(--copper) 42%, var(--gold));
  transition: transform 120ms linear;
}

/* ---------- 5. 页脚 ---------- */
.site-footer {
  margin-top: clamp(40px, 7vw, 96px);
  background: var(--table);
  border-top: 1px solid var(--moss);
}
.footer-grid {
  display: grid; gap: clamp(26px, 4vw, 52px);
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.5fr) minmax(0, 1fr);
  padding-block: clamp(34px, 5vw, 64px);
}
.footer-brand { padding-left: 18px; border-left: 2px solid var(--copper-deep); }
.footer-tagline { margin-top: 16px; font-size: 14.5px; line-height: 1.8; color: var(--sand); max-width: 34ch; }
.footer-note { margin-top: 10px; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .1em; color: var(--stone); }

.footer-nav { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2vw, 28px); }
.footer-col-title {
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .16em;
  color: var(--copper); margin-bottom: 14px;
}
.footer-links li { margin-bottom: 9px; }
.footer-links a {
  font-size: 14px; color: var(--sand);
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.footer-links a:hover { color: var(--gold); border-bottom-color: var(--copper); }

.contact-list li {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  margin-bottom: 12px; font-size: 13.5px;
}
.contact-key { font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; color: var(--stone); min-width: 34px; }
.contact-value { font-family: var(--font-mono); font-size: 12.5px; color: var(--paper); word-break: break-all; }
.copy-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border: 1px solid var(--moss); border-radius: var(--r-pill);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--stone);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.copy-btn:hover { border-color: var(--copper); color: var(--gold); background: rgba(200, 155, 74, .08); }
.copy-btn.is-done { border-color: var(--copper); color: var(--gold); }
.footer-hours { margin-top: 14px; font-size: 12.5px; line-height: 1.7; color: var(--stone); }

.footer-base { background: var(--table-deep); border-top: 1px solid var(--moss); }
.footer-base-inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 10px 26px; padding-block: 18px;
  font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .08em; color: var(--stone);
}
.legal { margin: 0; }
.legal-links { display: flex; flex-wrap: wrap; gap: 16px; }
.legal-links a { color: var(--stone); transition: color var(--dur) var(--ease); }
.legal-links a:hover { color: var(--gold); }

/* ---------- 6. 通用组件 ---------- */
.pill {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 9px 16px; border-radius: var(--r-pill);
  border: 1px solid var(--moss); background: transparent; color: var(--sand);
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .08em;
  cursor: pointer; white-space: nowrap;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.pill:hover { border-color: var(--copper); color: var(--gold); background: rgba(200, 155, 74, .1); transform: translateY(-1px); }
.pill:active { transform: translateY(1px); }
.pill-gold { background: var(--copper); border-color: var(--copper); color: var(--ink); font-weight: 700; }
.pill-gold:hover { background: var(--gold); border-color: var(--gold); color: var(--ink); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 12px 22px; border-radius: var(--r-pill);
  border: 1px solid var(--copper); background: var(--copper); color: var(--ink);
  font-size: 15px; font-weight: 700; letter-spacing: .02em; cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn:hover { background: var(--gold); border-color: var(--gold); transform: translateY(-1px); }
.btn:active { transform: translateY(1px); }
.btn-ghost { background: transparent; border-color: var(--moss); color: var(--paper); }
.btn-ghost:hover { background: rgba(200, 155, 74, .1); border-color: var(--copper); color: var(--gold); }
.btn-sm { padding: 9px 16px; font-size: 13.5px; }

.grid { display: grid; gap: clamp(16px, 2vw, 24px); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  background: var(--table); border: 1px solid var(--moss); border-radius: var(--r-md);
  padding: clamp(18px, 2.4vw, 26px);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.card--link { display: block; }
.card--link:hover { border-color: var(--copper-deep); background: #16382E; transform: translateY(-2px); }

.panel {
  background: var(--table); border: 1px solid var(--moss);
  border-radius: var(--r-lg) var(--r-sm) var(--r-lg) var(--r-sm);
  padding: clamp(22px, 3vw, 38px);
}

.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 13px; border-radius: var(--r-pill);
  border: 1px solid var(--moss); background: rgba(31, 74, 60, .35); color: var(--sand);
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .05em;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.tag:hover { border-color: var(--copper); color: var(--gold); background: rgba(200, 155, 74, .1); }
.tag:active { transform: translateY(2px); }
.tag-count { font-size: 11px; color: var(--copper-deep); }
.tag[aria-pressed="true"] { background: var(--copper); border-color: var(--copper); color: var(--ink); font-weight: 700; }
.tag[aria-pressed="true"] .tag-count { color: rgba(11, 29, 24, .72); }

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 9px; border-radius: 6px;
  border: 1px solid var(--copper-deep); background: rgba(110, 83, 36, .22); color: var(--gold);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em;
}
.badge-new { border-color: var(--cinnabar); background: rgba(184, 69, 47, .18); color: #EBA795; }

.stats { display: flex; flex-wrap: wrap; gap: clamp(18px, 3vw, 44px); }
.stat-num {
  display: block; line-height: 1.1;
  font-family: var(--font-mono); font-size: clamp(24px, 3vw, 34px);
  font-weight: 600; letter-spacing: -0.01em; color: var(--gold);
}
.stat-label { display: block; margin-top: 6px; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .12em; color: var(--stone); }

.data-list { border-top: 1px solid var(--moss); }
.data-row {
  display: grid; grid-template-columns: minmax(120px, 1fr) 2fr; gap: 16px;
  align-items: baseline; padding: 14px 2px;
  border-bottom: 1px solid rgba(31, 74, 60, .7);
}
.data-key { font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em; color: var(--stone); }
.data-val { color: var(--paper); }

.timeline { position: relative; padding-left: 26px; border-left: 1px solid var(--moss); }
.timeline-item { position: relative; padding-bottom: 28px; }
.timeline-item::before {
  content: ""; position: absolute; left: -33px; top: 8px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--felt); border: 2px solid var(--copper-deep);
}
.timeline-item.is-current::before { background: var(--copper); border-color: var(--gold); }
.timeline-date { font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em; color: var(--copper); }

.layout-rail { display: grid; gap: clamp(20px, 3vw, 40px); }
.rail { align-self: start; }
.rail-title { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: .16em; color: var(--copper); margin-bottom: 12px; }
.rail-list a {
  display: block; padding: 8px 0 8px 14px;
  border-left: 2px solid transparent;
  font-family: var(--font-mono); font-size: 12.5px; letter-spacing: .06em; color: var(--sand);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.rail-list a:hover { color: var(--gold); border-left-color: var(--copper-deep); }
.rail-list a[aria-current="true"] { color: var(--gold); border-left-color: var(--copper); }

.media {
  position: relative; overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--moss); border-radius: var(--r-md);
  background-color: var(--table);
  background-image:
    linear-gradient(135deg, rgba(31, 74, 60, .9), rgba(16, 43, 35, .96) 62%),
    repeating-linear-gradient(45deg, rgba(200, 155, 74, .07) 0 2px, transparent 2px 12px);
}
.media > img, .media > svg, .media > video { width: 100%; height: 100%; object-fit: cover; }
.media::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, transparent 56%, rgba(11, 29, 24, .5));
}
.media--wide { aspect-ratio: 16 / 9; }
.media--square { aspect-ratio: 1 / 1; }
.media--tall { aspect-ratio: 3 / 4; }
.media--slant { border-radius: var(--r-lg) var(--r-sm) var(--r-lg) var(--r-sm); transform: rotate(-1.2deg); }
.media-caption { margin-top: 10px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .05em; color: var(--stone); }

/* 焦点环 */
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 6px; }

/* 显现（仅在有 JS 时启用初始隐藏） */
.js-ready [data-reveal] {
  opacity: 0; transform: translateY(16px);
  transition: opacity 420ms var(--ease), transform 420ms var(--ease);
}
.js-ready [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 7. 响应式 ---------- */
@media (max-width: 1120px) {
  .rail-status { display: none; }
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: fixed; left: 0; right: 0; top: var(--header-h);
    flex-direction: column; align-items: stretch; gap: 0;
    max-height: calc(100vh - var(--header-h)); overflow-y: auto;
    padding: 14px var(--gutter) 28px;
    background: var(--table); border-bottom: 1px solid var(--moss);
    box-shadow: 0 30px 50px -30px rgba(0, 0, 0, .8);
    opacity: 0; visibility: hidden; pointer-events: none; transform: translateY(-10px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur) var(--ease);
  }
  .site-nav[data-open] { opacity: 1; visibility: visible; pointer-events: auto; transform: none; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; width: 100%; }
  .nav-list li { border-bottom: 1px solid rgba(31, 74, 60, .7); }
  .nav-link { width: 100%; padding: 15px 4px 15px 16px; font-size: 15px; letter-spacing: .08em; }
  .nav-link::after { left: 16px; right: auto; width: 46px; }
  .nav-actions { flex-wrap: wrap; padding: 18px 0 0; border-left: 0; border-top: 0; }
}

@media (max-width: 1023px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
  .footer-contact { grid-column: 1 / -1; }
}

@media (min-width: 1024px) {
  .layout-rail { grid-template-columns: minmax(200px, 250px) minmax(0, 1fr); }
  .rail { position: sticky; top: calc(var(--header-h) + 28px); }
}

@media (max-width: 720px) {
  body { font-size: 16px; }
  .header-inner { min-height: 64px; }
  :root { --header-h: 64px; }
  .brand-sub { font-size: 10px; letter-spacing: .12em; }
  .brand-mark { flex-basis: 32px; width: 32px; height: 32px; }
  .brand-mark svg { width: 16px; height: 16px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-nav { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .data-row { grid-template-columns: 1fr; gap: 4px; }
  .footer-base-inner { justify-content: flex-start; }
}

@media (max-width: 400px) {
  .nav-toggle-text { display: none; }
  .nav-toggle { padding: 10px 13px; }
  .footer-nav { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js-ready [data-reveal] { opacity: 1 !important; transform: none !important; }
  .media--slant { transform: none; }
  .scroll-progress-bar { transition: none; }
}