/* ============================================================
   B体育主站 · 共享样式  /assets/site.css
   简体版 v3.2 · 归档墨绿 + 信号荧光橙 + 数据网格蓝
   ============================================================ */

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

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

body, h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }

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

a { color: inherit; text-decoration: none; }
table { border-collapse: collapse; width: 100%; }
[hidden] { display: none !important; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #0B1F1A;
  --ink-deep: #081713;
  --panel: #12312A;
  --panel-soft: #173F36;
  --grid: #2E4A5C;
  --grid-soft: #7E97A6;
  --signal: #FF6A13;
  --signal-soft: #FFA45C;
  --paper: #F2EFE7;
  --dust: #B9C3BD;
  --done: #3FD08A;
  --amber: #F2C14E;

  --hairline: rgba(46, 74, 92, 0.45);
  --hairline-strong: rgba(46, 74, 92, 0.85);
  --wash: rgba(18, 49, 42, 0.72);

  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-head: "PingFang SC", "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;

  --radius-sm: 10px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-lift: 0 20px 44px -26px rgba(0, 0, 0, 0.9);

  --shell: 1440px;
  --gutter: clamp(20px, 5vw, 72px);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --rail-w: 3fr;
}

/* ---------- 3. 基础排版 ---------- */
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--paper);
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(46, 74, 92, 0.22) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 74, 92, 0.22) 1px, transparent 1px);
  background-size: 24px 24px, 24px 24px;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(120% 80% at 8% -12%, rgba(255, 106, 19, 0.10), transparent 62%),
    radial-gradient(90% 60% at 100% 0%, rgba(46, 74, 92, 0.30), transparent 58%);
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.16;
}

h1 { font-size: clamp(34px, 5.4vw, 64px); }
h2 { font-size: clamp(26px, 3.6vw, 44px); }
h3 { font-size: clamp(20px, 2.4vw, 28px); }
h4 { font-size: 20px; }

p { max-width: 68ch; }
strong { font-weight: 700; }
.mono { font-family: var(--font-mono); }
.text-signal { color: var(--signal); }
.text-dust { color: var(--dust); }
.text-paper { color: var(--paper); }

/* ---------- 4. 焦点与跳转 ---------- */
:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -72px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  background: var(--signal);
  color: #0B1F1A;
  font-weight: 700;
  font-size: 14px;
  transition: top 0.18s ease-out;
}

.skip-link:focus { top: 0; }

/* ---------- 5. 头部命令栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(11, 31, 26, 0.97), rgba(11, 31, 26, 0.88));
  border-bottom: 1px solid var(--hairline-strong);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-shell {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.6vw, 28px);
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 14px var(--gutter);
  transition: padding 0.18s ease-out;
}

.site-header[data-condensed="true"] .header-shell { padding-top: 7px; padding-bottom: 7px; }
.site-header[data-condensed="true"] .brand-tagline { opacity: 0; max-height: 0; }
.site-header[data-condensed="true"] .brand-mark { width: 30px; height: 30px; font-size: 16px; }

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: linear-gradient(140deg, var(--signal), var(--signal-soft));
  color: #0B1F1A;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: width 0.18s ease-out, height 0.18s ease-out, font-size 0.18s ease-out;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }

.brand-line {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 17px;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand-tagline {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--grid-soft);
  white-space: nowrap;
  max-height: 20px;
  overflow: hidden;
  transition: opacity 0.18s ease-out, max-height 0.18s ease-out;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}

.nav-list::-webkit-scrollbar { display: none; }

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 8px 11px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.01em;
  color: var(--dust);
  white-space: nowrap;
  transition: color 0.18s ease-out, background-color 0.18s ease-out;
}

.nav-link:hover,
.nav-link:focus-visible { color: var(--paper); background: var(--panel); }

.nav-link::after {
  content: "";
  position: absolute;
  left: 11px;
  bottom: 3px;
  width: 0;
  height: 2px;
  background: var(--signal);
  transition: width 0.18s ease-out;
}

.nav-link:hover::after,
.nav-link:focus-visible::after { width: calc(100% - 22px); }

.nav-link[aria-current="page"] {
  color: var(--paper);
  background: var(--panel);
}

.nav-link[aria-current="page"]::after { width: calc(100% - 22px); }

.nav-link[aria-current="page"] .nav-index { color: var(--signal); }

.nav-index {
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--grid-soft);
  transition: color 0.18s ease-out;
}

.nav-foot { display: none; }

/* 工具位与按钮 */
.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  margin-left: auto;
}

.tool-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 11px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--grid-soft);
  transition: color 0.18s ease-out, border-color 0.18s ease-out, background-color 0.18s ease-out;
}

.tool-link:hover,
.tool-link:focus-visible {
  color: var(--paper);
  border-color: var(--signal);
  background: rgba(255, 106, 19, 0.08);
}

.tool-glyph { color: var(--signal); font-size: 13px; line-height: 1; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform 0.18s ease-out, background-color 0.18s ease-out, color 0.18s ease-out, border-color 0.18s ease-out;
}

.btn-primary { background: var(--signal); color: #0B1F1A; font-weight: 700; }
.btn-primary:hover,
.btn-primary:focus-visible { background: var(--signal-soft); transform: translateY(-1px); }

.btn-ghost { border-color: var(--hairline-strong); color: var(--paper); background: transparent; }
.btn-ghost:hover,
.btn-ghost:focus-visible { border-color: var(--signal); color: var(--signal-soft); }

.btn-quiet { color: var(--dust); }
.btn-quiet:hover { color: var(--paper); background: var(--panel); }

/* 移动菜单按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--dust);
  transition: color 0.18s ease-out, border-color 0.18s ease-out;
}

.nav-toggle:hover,
.nav-toggle:focus-visible { color: var(--paper); border-color: var(--signal); }

.nav-toggle-bars { position: relative; display: block; width: 16px; height: 10px; }

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--signal);
  transition: transform 0.18s ease-out;
}

.nav-toggle-bars::before { top: 0; }
.nav-toggle-bars::after { bottom: 0; }

.site-header[data-open="true"] .nav-toggle-bars::before { transform: translateY(4px) rotate(45deg); }
.site-header[data-open="true"] .nav-toggle-bars::after { transform: translateY(-4px) rotate(-45deg); }
.nav-toggle-text { letter-spacing: 0.06em; }

/* ---------- 6. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(56px, 8vw, 120px);
  background: var(--ink-deep);
  border-top: 1px solid var(--hairline-strong);
}

.footer-shell {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  grid-template-columns: 1fr;
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 72px) var(--gutter) 28px;
}

.footer-mark {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  margin-bottom: 12px;
  border-radius: var(--radius-sm);
  background: linear-gradient(140deg, var(--signal), var(--signal-soft));
  color: #0B1F1A;
  font-family: var(--font-mono);
  font-weight: 700;
}

.footer-brand-line {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.footer-tagline {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--grid-soft);
}

.footer-blurb {
  margin-top: 14px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--dust);
  max-width: 34ch;
}

.footer-columns {
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grid-soft);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hairline);
}

.footer-list { margin-top: 14px; display: flex; flex-direction: column; gap: 9px; }

.footer-list a {
  font-size: 14.5px;
  color: var(--dust);
  transition: color 0.18s ease-out;
}

.footer-list a:hover,
.footer-list a:focus-visible { color: var(--signal-soft); }

.footer-contact-list { margin-top: 14px; display: flex; flex-direction: column; gap: 12px; }

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

.contact-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--grid-soft);
}

.contact-value { font-size: 14px; line-height: 1.6; color: var(--paper); }

.contact-note {
  margin-top: 14px;
  padding-left: 12px;
  border-left: 2px solid var(--signal);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--dust);
  max-width: 40ch;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 20px var(--gutter) 40px;
  border-top: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--grid-soft);
}

.legal-icp { color: var(--dust); }
.legal-disclaimer { max-width: 46ch; }
.legal-links { display: flex; flex-wrap: wrap; gap: 18px; margin-left: auto; }
.legal-links a { transition: color 0.18s ease-out; }
.legal-links a:hover,
.legal-links a:focus-visible { color: var(--signal-soft); }

/* ---------- 7. 通用布局 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(44px, 6vw, 88px); }

.section--panel {
  background: var(--panel);
  border-radius: var(--radius-lg);
  padding-inline: clamp(20px, 3vw, 40px);
}

.grid-12 {
  display: grid;
  gap: clamp(20px, 2.4vw, 32px);
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

.stack { display: flex; flex-direction: column; gap: clamp(18px, 2.4vw, 32px); }
.stack-sm { display: flex; flex-direction: column; gap: 12px; }

/* ---------- 8. 区块标题与索引 ---------- */
.section-head { display: flex; flex-direction: column; gap: 10px; max-width: 68ch; }

.index-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--signal);
}

.section-title { font-size: clamp(26px, 3.4vw, 44px); }

.section-lede { font-size: 15px; line-height: 1.8; color: var(--dust); max-width: 46ch; }

.signal-underline { position: relative; display: inline-block; }

.signal-underline::after {
  content: "";
  display: block;
  width: 0;
  height: 3px;
  margin-top: 10px;
  background: var(--signal);
  transition: width 0.32s var(--ease);
}

.signal-underline.is-drawn::after { width: min(140px, 46%); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--grid-soft);
  padding-bottom: 2px;
  border-bottom: 1px solid var(--hairline-strong);
}

/* ---------- 9. 卡片与数据模块 ---------- */
.card {
  background: var(--panel);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: clamp(18px, 2.2vw, 26px);
}

.card--interactive { transition: transform 0.18s ease-out, border-color 0.18s ease-out, background-color 0.18s ease-out; }

.card--interactive:hover,
.card--interactive:focus-within {
  transform: translateY(-3px);
  border-color: var(--signal);
  background: var(--panel-soft);
}

.card-title { font-size: 18px; font-weight: 900; letter-spacing: -0.01em; }
.card-meta { font-family: var(--font-mono); font-size: 12px; color: var(--grid-soft); }

.stat { display: flex; flex-direction: column; gap: 4px; }

.stat-value {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 44px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--paper);
  line-height: 1.1;
}

.stat-value--signal { color: var(--signal); }

.stat-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--grid-soft);
}

.data-table { font-size: 14px; }

.data-table th,
.data-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--hairline);
  vertical-align: top;
}

.data-table th {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--grid-soft);
  font-weight: 700;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--dust);
}

.status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--grid-soft);
}

.status--done::before { background: var(--done); }
.status--warn::before { background: var(--amber); }

/* ---------- 10. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--grid-soft);
  padding-block: 16px;
}

.breadcrumb li { display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li + li::before { content: "/"; color: var(--grid); }
.breadcrumb a:hover,
.breadcrumb a:focus-visible { color: var(--signal-soft); }

/* ---------- 11. 芯片 / 标签云 ---------- */
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 13px;
  border: 1px solid transparent;
  border-radius: 999px;
  background: rgba(46, 74, 92, 0.35);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--dust);
  transition: color 0.18s ease-out, background-color 0.18s ease-out, border-color 0.18s ease-out;
}

.chip:hover { color: var(--paper); border-color: var(--hairline-strong); }

.chip[aria-pressed="true"],
.chip.is-active {
  background: var(--signal);
  color: #0B1F1A;
  font-weight: 700;
}

/* ---------- 12. 分段切换器 ---------- */
.tablist {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--panel);
  border-radius: 999px;
  overflow-x: auto;
  scrollbar-width: none;
}

.tablist::-webkit-scrollbar { display: none; }

.tab {
  padding: 8px 16px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--dust);
  white-space: nowrap;
  transition: color 0.18s ease-out, background-color 0.18s ease-out;
}

.tab:hover { color: var(--paper); }

.tab[aria-selected="true"] {
  background: var(--signal);
  color: #0B1F1A;
  font-weight: 700;
}

.tabpanel { padding-top: clamp(18px, 2.4vw, 28px); }

/* ---------- 13. 时间轴 ---------- */
.rail { position: relative; padding-left: 26px; }

.rail::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: var(--hairline-strong);
}

.rail-item { position: relative; padding-block: 10px; }

.rail-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 18px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px rgba(255, 106, 19, 0.16);
}

.rail-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--signal);
}

/* ---------- 14. 翻转档案抽屉 ---------- */
.drawer-card { position: relative; perspective: 1200px; }

.drawer-inner {
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.42s var(--ease);
}

.drawer-card[data-flip="true"] .drawer-inner { transform: rotateY(180deg); }

.drawer-face,
.drawer-front,
.drawer-back {
  background: var(--panel);
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  padding: clamp(18px, 2.2vw, 24px);
  backface-visibility: hidden;
}

.drawer-back {
  position: absolute;
  inset: 0;
  transform: rotateY(180deg);
  background: var(--panel-soft);
  border-color: var(--hairline-strong);
}

/* ---------- 15. 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(46, 74, 92, 0.42), rgba(18, 49, 42, 0.92));
}

.media-frame > img { width: 100%; height: 100%; object-fit: cover; }

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(46, 74, 92, 0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 74, 92, 0.35) 1px, transparent 1px);
  background-size: 48px 48px;
  mix-blend-mode: screen;
  opacity: 0.55;
}

.media-16x9 { aspect-ratio: 16 / 9; }
.media-4x3 { aspect-ratio: 4 / 3; }
.media-1x1 { aspect-ratio: 1 / 1; }
.media-3x4 { aspect-ratio: 3 / 4; }
.media-wide { aspect-ratio: 21 / 9; }

.media-caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--grid-soft);
}

/* ---------- 16. 装饰层 ---------- */
.grid-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(46, 74, 92, 0.28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 74, 92, 0.28) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.7;
}

.ridge-layer {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: clamp(120px, 22vw, 280px);
  pointer-events: none;
  opacity: 0.1;
  background: linear-gradient(180deg, transparent, var(--signal));
  clip-path: polygon(0% 82%, 9% 66%, 18% 74%, 28% 52%, 37% 63%, 46% 40%, 56% 58%, 66% 34%, 76% 55%, 86% 44%, 94% 62%, 100% 50%, 100% 100%, 0% 100%);
}

/* ---------- 17. 交互辅助 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 120;
  pointer-events: none;
  background: rgba(46, 74, 92, 0.35);
}

.scroll-progress-bar {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--signal), var(--signal-soft));
  transition: width 0.12s linear;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.32s ease-out, transform 0.32s var(--ease);
}

[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1120px) {
  .nav-toggle { display: inline-flex; }

  .command-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 70;
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 16px var(--gutter) 22px;
    background: var(--panel);
    border-bottom: 1px solid var(--hairline-strong);
    box-shadow: var(--shadow-lift);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    max-height: calc(100vh - 60px);
    overflow-y: auto;
    transition: opacity 0.18s ease-out, transform 0.18s ease-out, visibility 0.18s;
  }

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

  .nav-list { flex-direction: column; align-items: stretch; gap: 2px; overflow: visible; }

  .nav-link { justify-content: flex-start; font-size: 15px; padding: 12px; }

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

  .nav-foot {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--hairline);
  }

  .header-cta,
  .header-cta-ghost { display: none; }
}

@media (max-width: 1024px) {
  .grid-12 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-8, .col-9 { grid-column: span 6; }
  .col-7 { grid-column: span 6; }
  .col-5 { grid-column: span 4; }
  .col-4 { grid-column: span 3; }
  .col-3 { grid-column: span 3; }
}

@media (max-width: 768px) {
  .grid-12 { grid-template-columns: minmax(0, 1fr); }
  .grid-12 > [class*="col-"] { grid-column: auto; }
  .tool-text { display: none; }
  .brand-tagline { font-size: 10px; letter-spacing: 0.04em; }
  .footer-shell { gap: 32px; }
  .footer-blurb { max-width: none; }
  .footer-legal { padding-bottom: 32px; }
  .legal-links { margin-left: 0; }
  .data-table { display: block; overflow-x: auto; white-space: nowrap; }
}

@media (max-width: 480px) {
  body { font-size: 15.5px; }
  .header-shell { gap: 8px; }
  .brand-line { font-size: 15.5px; }
  .tool-link { padding: 8px 9px; }
}

/* ---------- 19. 减少动态效果 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.12s !important;
  }

  [data-reveal] { opacity: 1; transform: none; }
  .signal-underline::after { width: min(140px, 46%); }
  .scroll-progress-bar { transition: none; }

  .drawer-card[data-flip="true"] .drawer-inner { transform: none; }

  .drawer-back { display: none; }

  .drawer-card[data-flip="true"] .drawer-back {
    display: block;
    position: absolute;
    inset: 0;
    transform: none;
  }

  .drawer-card[data-flip="true"] .drawer-front { visibility: hidden; }
}