/* ============================================================
   宝威体育中心 · 共享样式表 /assets/site.css
   设计语言：夜场墨绿底 × 暖纸说明牌 × 荧光青柠数据高亮
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 130px;
}

body,
h1, h2, h3, h4, h5, h6,
p, ul, ol, li, figure, figcaption,
blockquote, dl, dd, details, summary { margin: 0; padding: 0; }

ul, ol { list-style: none; }

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

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

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

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

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 色板 */
  --ink: #0B1B17;
  --ink-2: #101314;
  --ink-3: #16302A;
  --paper: #F3EBDC;
  --paper-2: #E4DAC6;
  --lime: #C8FF4D;
  --gold: #E4B45B;
  --red: #9B2230;
  --text: #C9D3CE;
  --muted: #8A9A93;
  --rule: #1E3A31;
  --rule-soft: rgba(30, 58, 49, 0.55);

  /* 排版 */
  --font-display: "Archivo Narrow", "Arial Narrow", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-sans: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  /* 布局 */
  --maxw: 1200px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 14px;
  --radius-sm: 8px;

  /* 节奏 */
  --section-y: clamp(48px, 7vw, 96px);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 3. 基础排版 ---------- */
body {
  background-color: var(--ink);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  min-height: 100vh;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  color: var(--paper);
  line-height: 1.12;
  letter-spacing: -0.02em;
}

strong { color: var(--paper); font-weight: 700; }
small { font-size: 12px; color: var(--muted); }
hr { border: 0; border-top: 1px solid var(--rule); margin: 24px 0; }

::selection { background: var(--lime); color: var(--ink); }

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

#main-content { display: block; }
#main-content:focus { outline: none; }

.bw-sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 4. 跳转链接 ---------- */
.bw-skip {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 300;
  padding: 10px 18px;
  background: var(--lime);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  border-radius: var(--radius-sm);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.45);
  transition: top 0.2s var(--ease);
}
.bw-skip:focus { top: 12px; }

/* ---------- 5. 刊头 ---------- */
.bw-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(11, 27, 23, 0.98), rgba(11, 27, 23, 0.93));
  border-bottom: 1px solid var(--rule);
  color: var(--text);
}

.bw-progress {
  position: absolute;
  left: 0; right: 0; top: 0;
  height: 3px;
  background: var(--rule);
  overflow: hidden;
}
.bw-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--lime), var(--gold));
  transform: scaleX(0);
  transform-origin: 0 50%;
}

.bw-header__inner {
  width: min(var(--maxw), 100%);
  margin-inline: auto;
  padding: 0 var(--gutter);
}

.bw-toolbar {
  display: flex;
  align-items: center;
  gap: 10px 14px;
  flex-wrap: wrap;
  padding: 14px 0 10px;
  border-bottom: 1px dashed var(--rule-soft);
  font-size: 13px;
}

.bw-utility {
  display: flex;
  align-items: center;
  gap: 6px 14px;
  flex-wrap: wrap;
}

.bw-utility__link {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
  padding: 4px 2px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.bw-utility__link:hover { color: var(--lime); border-bottom-color: var(--lime); }

.bw-toolbar__cta { margin-left: auto; }

/* 品牌组合 */
.bw-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--paper);
}
.bw-brand__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(200, 255, 77, 0.14);
  animation: bw-pulse 2.4s var(--ease) infinite;
}
.bw-brand__mark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--lime);
  border: 2px solid var(--lime);
  padding: 4px 8px;
  border-radius: 4px;
}
.bw-brand__mark--sm {
  font-size: 13px;
  border-width: 1px;
  padding: 3px 6px;
}
.bw-brand__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 44px);
  letter-spacing: -0.03em;
  color: var(--paper);
}
.bw-brand__name--sm { font-size: 16px; letter-spacing: 0; }
.bw-brand__name--footer { font-size: clamp(20px, 2.4vw, 26px); letter-spacing: -0.02em; }

.bw-brand--masthead { gap: 14px; }
.bw-brand--compact { display: none; gap: 9px; }
.bw-brand--footer { gap: 10px; }

/* 赛季切换器 */
.bw-season { position: relative; }
.bw-season__summary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 4px 12px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  cursor: pointer;
  list-style: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.bw-season__summary::-webkit-details-marker { display: none; }
.bw-season__summary:hover { color: var(--paper); border-color: var(--muted); }
.bw-season[open] .bw-season__summary { color: var(--lime); border-color: var(--lime); }
.bw-season__label { letter-spacing: 0.16em; }
.bw-season__value { color: var(--lime); font-weight: 700; }
.bw-season__panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  z-index: 80;
  display: grid;
  grid-template-columns: repeat(3, minmax(54px, 1fr));
  gap: 4px;
  min-width: 216px;
  padding: 10px;
  background: var(--ink-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  box-shadow: 0 20px 45px rgba(0, 0, 0, 0.55);
}
.bw-season__item {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 7px 6px;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--text);
  transition: background-color 0.18s var(--ease), color 0.18s var(--ease);
}
.bw-season__item:hover { background: var(--ink-3); color: var(--paper); }
.bw-season__item[aria-pressed="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
  font-weight: 700;
}

/* 刊头主区 */
.bw-masthead {
  padding: 20px 0 16px;
  text-align: center;
  border-bottom: 1px solid var(--rule);
}
.bw-masthead__tag {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--muted);
}
.bw-masthead__issue {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rule);
  color: #4C6A5F;
}

/* 栏目导航 */
.bw-nav { border-top: 1px solid var(--rule-soft); }
.bw-nav__list {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0 clamp(6px, 2vw, 26px);
}
.bw-nav__item { display: block; }
.bw-nav__link {
  position: relative;
  display: block;
  padding: 14px 4px 16px;
  font-size: 14px;
  letter-spacing: 0.09em;
  color: var(--text);
  transition: color 0.2s var(--ease);
}
.bw-nav__link::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 9px;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.24s var(--ease);
}
.bw-nav__link:hover { color: var(--paper); }
.bw-nav__link:hover::after { transform: scaleX(1); }
.bw-nav__link[aria-current="page"] { color: var(--lime); }
.bw-nav__link[aria-current="page"]::after { transform: scaleX(1); }

/* 移动菜单按钮 */
.bw-nav-toggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 8px 13px;
  border: 1px solid var(--rule);
  border-radius: var(--radius-sm);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: 0.08em;
}
.bw-nav-toggle__bars {
  position: relative;
  display: block;
  width: 16px;
  height: 10px;
}
.bw-nav-toggle__bars::before,
.bw-nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: var(--lime);
  transition: transform 0.22s var(--ease), top 0.22s var(--ease), bottom 0.22s var(--ease);
}
.bw-nav-toggle__bars::before { top: 0; }
.bw-nav-toggle__bars::after { bottom: 0; }
.bw-nav-toggle[aria-expanded="true"] .bw-nav-toggle__bars::before { top: 4px; transform: rotate(45deg); }
.bw-nav-toggle[aria-expanded="true"] .bw-nav-toggle__bars::after { bottom: 4px; transform: rotate(-45deg); }

/* 收拢态 */
.bw-header[data-stuck] .bw-masthead { display: none; }
.bw-header[data-stuck] .bw-toolbar { padding: 8px 0; border-bottom: 0; }
.bw-header[data-stuck] .bw-brand--compact { display: inline-flex; }
.bw-header[data-stuck] .bw-nav__link { padding: 11px 4px 13px; }

@keyframes bw-pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(200, 255, 77, 0.14); }
  50% { box-shadow: 0 0 0 8px rgba(200, 255, 77, 0.03); }
}

/* ---------- 6. 页脚 ---------- */
.bw-footer {
  margin-top: var(--section-y);
  background: var(--ink-2);
  border-top: 1px solid var(--rule);
  color: var(--text);
}
.bw-footer__inner {
  width: min(var(--maxw), 100%);
  margin-inline: auto;
  padding: clamp(32px, 5vw, 64px) var(--gutter);
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(24px, 4vw, 56px);
}
.bw-footer__pitch {
  margin-top: 14px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.bw-footer__contact {
  margin-top: 18px;
  font-size: 13px;
  line-height: 2;
  color: var(--muted);
  word-break: break-word;
}
.bw-footer__contact-key {
  display: inline-block;
  min-width: 5em;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime);
}
.bw-footer__nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(16px, 3vw, 32px);
}
.bw-footer__col-title {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--paper);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--rule);
}
.bw-footer__links { display: flex; flex-direction: column; }
.bw-footer__link {
  display: block;
  padding: 7px 0;
  font-size: 14px;
  color: var(--text);
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}
.bw-footer__link:hover { color: var(--lime); padding-left: 5px; }

.bw-footer__legal {
  background: var(--paper);
  color: #171B1A;
  border-top: 1px solid var(--paper-2);
}
.bw-footer__legal-inner {
  width: min(var(--maxw), 100%);
  margin-inline: auto;
  padding: 16px var(--gutter);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  font-size: 12px;
  letter-spacing: 0.06em;
}
.bw-footer__icp {
  font-family: var(--font-mono);
  font-weight: 700;
  color: #171B1A;
}
.bw-footer__copy { color: #4A524E; }

/* ---------- 7. 布局容器 ---------- */
.bw-container {
  width: min(var(--maxw), 100%);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.bw-section { padding-block: var(--section-y); }
.bw-section--tight { padding-block: clamp(28px, 4vw, 56px); }
.bw-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px 24px;
  padding-bottom: 18px;
  margin-bottom: clamp(18px, 3vw, 34px);
  border-bottom: 1px solid var(--rule);
}
.bw-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}
.bw-eyebrow--lime { color: var(--lime); }
.bw-eyebrow--gold { color: var(--gold); }

/* 刻度边带与斜切 */
.bw-rail { position: relative; padding-inline: clamp(12px, 3vw, 34px); }
.bw-rail::before,
.bw-rail::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  width: 10px;
  background-image: repeating-linear-gradient(to bottom, var(--rule) 0 1px, transparent 1px 28px);
  opacity: 0.9;
  pointer-events: none;
}
.bw-rail::before { left: 0; }
.bw-rail::after { right: 0; }

.bw-slant { clip-path: polygon(0 0, 100% 2.6%, 100% 100%, 0 97.4%); }
.bw-slant--rev { clip-path: polygon(0 2.6%, 100% 0, 100% 97.4%, 0 100%); }

/* ---------- 8. 标题与正文 ---------- */
.bw-display--xl {
  font-size: clamp(44px, 9vw, 96px);
  line-height: 0.96;
  letter-spacing: -0.045em;
}
.bw-display--lg { font-size: clamp(34px, 5.4vw, 64px); letter-spacing: -0.035em; }
.bw-display--md { font-size: clamp(26px, 3.6vw, 44px); letter-spacing: -0.028em; }
.bw-display--sm { font-size: clamp(20px, 2.4vw, 30px); letter-spacing: -0.02em; }

.bw-prose {
  max-width: 42em;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
}
.bw-prose p + p { margin-top: 1.05em; }
.bw-prose h2 { margin: 1.8em 0 0.6em; font-size: clamp(22px, 2.4vw, 30px); }
.bw-prose h3 { margin: 1.5em 0 0.5em; font-size: clamp(18px, 1.9vw, 22px); color: var(--gold); }
.bw-prose ul, .bw-prose ol { margin: 1em 0 1em 1.2em; }
.bw-prose ul { list-style: square; }
.bw-prose ol { list-style: decimal; }
.bw-prose li { margin: 0.4em 0; }
.bw-prose a { color: var(--lime); border-bottom: 1px solid rgba(200, 255, 77, 0.4); }

/* ---------- 9. 网格 ---------- */
.bw-grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
}
.bw-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.bw-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.bw-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.bw-grid--7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.bw-grid--8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
.bw-grid--5-7 { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }

/* ---------- 10. 面板与标签 ---------- */
.bw-panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--ink-2);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}
.bw-panel--ink { background: var(--ink-3); }
.bw-panel--paper {
  background: var(--paper);
  border-color: var(--paper-2);
  color: #232B28;
}
.bw-panel--paper h2,
.bw-panel--paper h3,
.bw-panel--paper h4,
.bw-panel--paper strong { color: #131917; }
.bw-panel--paper .bw-stat__label,
.bw-panel--paper .bw-figure__caption { color: #5A625D; }
.bw-panel--grid::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background-image:
    linear-gradient(var(--rule) 1px, transparent 1px),
    linear-gradient(90deg, var(--rule) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: 0.55;
  transition: transform 0.45s var(--ease);
}
.bw-panel--grid:hover::before { transform: translate(5px, 5px); }
.bw-panel--grid > * { position: relative; }

.bw-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 3px;
  background: var(--paper);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  line-height: 1.6;
}
.bw-tag--lime { background: var(--lime); color: var(--ink); }
.bw-tag--gold { background: var(--gold); color: var(--ink); }
.bw-tag--red { background: var(--red); color: var(--paper); }
.bw-tag--outline {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--rule);
}

/* ---------- 11. 数据指标 ---------- */
.bw-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.bw-stat__label {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}
.bw-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}
.bw-num--gold { color: var(--gold); }
.bw-num--paper { color: var(--paper); }

/* ---------- 12. 按钮 ---------- */
.bw-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
              border-color 0.2s var(--ease), transform 0.16s var(--ease);
}
.bw-btn--primary { background: var(--lime); color: var(--ink); }
.bw-btn--primary:hover { background: #D8FF7B; transform: translateY(-1px); }
.bw-btn--gold {
  background: transparent;
  color: var(--gold);
  border-color: var(--gold);
}
.bw-btn--gold:hover { background: rgba(228, 180, 91, 0.12); }
.bw-btn--ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--rule);
}
.bw-btn--ghost:hover { color: var(--lime); border-color: var(--lime); }
.bw-btn--sm { padding: 9px 16px; font-size: 12px; letter-spacing: 0.08em; }

/* ---------- 13. 面包屑与章节导航 ---------- */
.bw-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 16px 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.bw-breadcrumb a { transition: color 0.2s var(--ease); }
.bw-breadcrumb a:hover { color: var(--lime); }
.bw-breadcrumb__sep { color: var(--rule); }
.bw-breadcrumb [aria-current="page"] { color: var(--paper); }

.bw-chapter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.bw-chapter__link {
  padding: 8px 15px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease),
              background-color 0.2s var(--ease);
}
.bw-chapter__link:hover { color: var(--paper); border-color: var(--muted); }
.bw-chapter__link[aria-current="true"] {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 14. 图片容器 ---------- */
.bw-figure {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.bw-figure__media {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--ink-3);
}
.bw-figure__media.is-loading {
  background-image: repeating-linear-gradient(
    115deg,
    var(--ink-3) 0 14px,
    var(--ink-2) 14px 28px
  );
}
.bw-figure__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.55s var(--ease);
}
.bw-figure__img.is-loaded { opacity: 1; }
.bw-figure__caption {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.7;
  color: var(--muted);
}
.bw-figure--wide .bw-figure__media { aspect-ratio: 21 / 9; }
.bw-figure--tall .bw-figure__media { aspect-ratio: 4 / 5; }
.bw-figure--square .bw-figure__media { aspect-ratio: 1 / 1; }

/* ---------- 15. 进入视口 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1024px) {
  .bw-footer__inner { grid-template-columns: minmax(0, 1fr); }
  .bw-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  html { scroll-padding-top: 96px; }

  .bw-header__inner { padding-inline: var(--gutter); }
  .bw-masthead { padding: 16px 0 14px; }
  .bw-masthead__issue { display: none; }

  .bw-footer__nav { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }

  .bw-grid--2,
  .bw-grid--3,
  .bw-grid--4,
  .bw-grid--7-5,
  .bw-grid--8-4,
  .bw-grid--5-7 { grid-template-columns: minmax(0, 1fr); }

  .bw-rail { padding-inline: 12px; }
  .bw-rail::before,
  .bw-rail::after { width: 6px; }

  /* 折叠导航：仅在脚本可用时启用 */
  .bw-header[data-nav-ready] .bw-nav-toggle { display: inline-flex; }
  .bw-header[data-nav-ready] .bw-nav { display: none; }
  .bw-header[data-nav-ready] .bw-nav[data-open] {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 70;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    padding: 6px var(--gutter) 20px;
    background: var(--ink-2);
    border-top: 1px solid var(--rule);
    border-bottom: 2px solid var(--lime);
    box-shadow: 0 24px 50px rgba(0, 0, 0, 0.55);
  }
  .bw-header[data-nav-ready] .bw-nav__list {
    flex-direction: column;
    gap: 0;
  }
  .bw-header[data-nav-ready] .bw-nav__item { width: 100%; }
  .bw-header[data-nav-ready] .bw-nav__link {
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--rule);
  }
  .bw-header[data-nav-ready] .bw-nav__link::after { display: none; }
  .bw-header[data-nav-ready] .bw-nav__link[aria-current="page"] {
    padding-left: 14px;
    border-left: 3px solid var(--lime);
  }
}

@media (max-width: 640px) {
  .bw-toolbar { gap: 8px 10px; }
  .bw-utility__link { display: none; }
  .bw-toolbar__cta { margin-left: auto; }
  .bw-footer__nav { grid-template-columns: minmax(0, 1fr); }
  .bw-footer__legal-inner { flex-direction: column; align-items: flex-start; }
  .bw-panel { padding: 18px; }
}

/* ---------- 17. 动效降级 ---------- */
@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;
  }
  [data-reveal] { opacity: 1; transform: none; }
  .bw-panel--grid:hover::before { transform: none; }
}