/* ==========================================================================
   博业体育数据 /assets/site.css
   共享外壳：重置、变量、中文排版、头部、页脚、通用组件
   ========================================================================== */

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

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--paper);
  background-color: var(--ink);
  background-image:
    radial-gradient(1100px 520px at 84% -10%, rgba(46, 242, 208, 0.10), transparent 62%),
    radial-gradient(900px 460px at 4% 6%, rgba(255, 122, 47, 0.07), transparent 60%),
    radial-gradient(700px 380px at 50% 108%, rgba(197, 58, 74, 0.10), transparent 70%);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}
table { border-collapse: collapse; }

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

/* ---------- 2. 设计变量 ---------- */
:root {
  --ink: #071426;
  --ink-deep: #0B1220;
  --ink-soft: #0F1D33;
  --paper: #F2E9DA;
  --paper-ink: #17202A;
  --cyan: #2EF2D0;
  --orange: #FF7A2F;
  --saffron: #C53A4A;
  --gold: #E7B75A;
  --mist: #7F9BB8;
  --green: #8DF2A3;

  --line: rgba(127, 155, 184, 0.24);
  --line-soft: rgba(127, 155, 184, 0.14);
  --line-cyan: rgba(46, 242, 208, 0.34);

  --font-display: "Barlow Condensed", "Oswald", "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;

  --radius: 10px;
  --radius-sm: 6px;
  --shell: 1280px;
  --gutter: clamp(1.1rem, 4vw, 3.5rem);
  --ease: cubic-bezier(0.22, 0.7, 0.28, 1);
  --shadow-panel: 0 20px 52px -30px rgba(0, 0, 0, 0.9);
}

/* ---------- 3. 基础布局 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-main {
  display: block;
  padding-bottom: clamp(2rem, 5vw, 4rem);
}

.section { padding-block: clamp(2.4rem, 5vw, 4.4rem); }

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 1.6rem;
  margin-bottom: clamp(1.2rem, 2.5vw, 2rem);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: currentColor;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 600;
  line-height: 1.14;
  letter-spacing: 0.01em;
}

.lede {
  max-width: 68ch;
  font-size: clamp(1rem, 1.3vw, 1.1rem);
  line-height: 1.78;
  color: rgba(242, 233, 218, 0.78);
}

.note {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  line-height: 1.7;
  color: var(--mist);
}

.divider {
  height: 1px;
  border: 0;
  margin: 0;
  background: var(--line-soft);
}

/* 长文正文 */
.prose {
  max-width: 74ch;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(242, 233, 218, 0.86);
}
.prose > * + * { margin-top: 1.05em; }
.prose h2 {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.2vw, 1.7rem);
  line-height: 1.25;
  color: var(--paper);
  margin-top: 1.8em;
}
.prose h3 {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--paper);
  margin-top: 1.5em;
}
.prose ul { display: grid; gap: 0.45em; }
.prose li { position: relative; padding-left: 1.15rem; }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  transform: rotate(45deg);
}
.prose a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.prose strong { color: var(--paper); }

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.72rem 1.25rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  line-height: 1.2;
  white-space: nowrap;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease),
    color 0.2s var(--ease), transform 0.2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--cyan); color: #04211C; }
.btn--primary:hover { background: #6ff8e1; }
.btn--accent { background: var(--orange); color: #2A0F02; }
.btn--accent:hover { background: #ff9a5e; }
.btn--ghost { border-color: var(--line); color: var(--paper); }
.btn--ghost:hover { border-color: var(--line-cyan); color: var(--cyan); }
.btn--small { padding: 0.5rem 0.9rem; font-size: 0.72rem; }

/* ---------- 5. 网格 ---------- */
.grid { display: grid; gap: clamp(1rem, 2vw, 1.6rem); }
.grid--12 { 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-full { grid-column: 1 / -1; }

/* ---------- 6. 头部 ---------- */
.skip-link {
  position: fixed;
  top: 0.6rem;
  left: 0.6rem;
  z-index: 200;
  padding: 0.62rem 1rem;
  border-radius: var(--radius-sm);
  background: var(--cyan);
  color: #04211C;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  transform: translateY(-180%);
  transition: transform 0.22s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--ink-deep);
  border-bottom: 1px solid var(--line-soft);
  box-shadow: 0 16px 40px -32px rgba(0, 0, 0, 0.95);
}

.header-ribbon {
  background: var(--ink-deep);
  border-bottom: 1px solid var(--line-soft);
}

.ribbon-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 48px;
  padding-block: 0.42rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.68rem;
  color: var(--paper);
}

.brand-mark {
  position: relative;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(46, 242, 208, 0.55);
  border-radius: 4px;
  background:
    radial-gradient(circle at 28% 22%, rgba(46, 242, 208, 0.28), transparent 68%),
    linear-gradient(150deg, rgba(255, 122, 47, 0.16), transparent 60%);
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.brand-mark::before {
  content: "";
  position: absolute;
  inset: 8px;
  border-left: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
}
.brand-mark::after {
  content: "";
  position: absolute;
  top: 7px;
  right: 7px;
  width: 7px;
  height: 7px;
  background: var(--orange);
  transform: rotate(45deg);
}
.brand:hover .brand-mark,
.brand:focus-visible .brand-mark {
  border-color: var(--cyan);
  transform: rotate(6deg);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.14;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.ribbon-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--mist);
  white-space: nowrap;
}
.status-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(46, 242, 208, 0.18);
  animation: status-pulse 2.4s ease-in-out infinite;
}
@keyframes status-pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(46, 242, 208, 0.20); }
  50% { box-shadow: 0 0 0 7px rgba(46, 242, 208, 0.04); }
}
.status-label { color: var(--mist); }
.status-value { color: var(--cyan); }

.header-nav-bar {
  position: relative;
  background: linear-gradient(180deg, rgba(7, 20, 38, 0.97), rgba(7, 20, 38, 0.88));
  border-bottom: 1px solid var(--line-cyan);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  min-height: 56px;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.68rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--paper);
}
.nav-toggle:hover { border-color: var(--line-cyan); }

.nav-toggle-bars {
  display: grid;
  gap: 3px;
  width: 16px;
}
.nav-toggle-bar {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.24s var(--ease), opacity 0.18s var(--ease);
}
.site-header[data-open] .nav-toggle-bar:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.site-header[data-open] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle-bar:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }
.nav-toggle-text { text-transform: uppercase; }

.nav-panel {
  display: flex;
  align-items: center;
  flex: 1 1 auto;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 0.15rem;
  margin-right: auto;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 0.92rem 0.72rem;
  font-family: var(--font-display);
  font-size: 0.98rem;
  letter-spacing: 0.06em;
  color: rgba(242, 233, 218, 0.76);
  transition: color 0.2s var(--ease);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0.72rem;
  right: 0.72rem;
  bottom: 0.48rem;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.24s var(--ease);
}
.nav-link:hover { color: var(--paper); }
.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }
.nav-link[aria-current="page"] { color: var(--cyan); }
.nav-link[aria-current="page"]::after { transform: scaleX(1); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-left: auto;
  padding: 0.5rem 0.95rem;
  border: 1px solid rgba(255, 122, 47, 0.5);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  color: var(--orange);
  white-space: nowrap;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.nav-cta::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 122, 47, 0.16);
}
.nav-cta:hover,
.nav-cta:focus-visible {
  background: rgba(255, 122, 47, 0.14);
  border-color: var(--orange);
  color: #FFD3B3;
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(2rem, 5vw, 4rem);
  background: var(--ink-deep);
  border-top: 1px solid var(--line-soft);
  color: var(--paper);
}

.footer-rule {
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--cyan) 0 22%,
    var(--orange) 22% 38%,
    var(--saffron) 38% 48%,
    var(--gold) 48% 56%,
    rgba(127, 155, 184, 0.16) 56% 100%
  );
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.25fr 0.95fr;
  gap: clamp(1.4rem, 3vw, 3rem);
  padding-block: clamp(2.2rem, 4vw, 3.4rem);
}

.footer-title {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
  margin-bottom: 0.9rem;
}

.footer-list {
  display: grid;
  gap: 0.5rem;
}

.footer-link {
  font-size: 0.88rem;
  color: rgba(242, 233, 218, 0.8);
  transition: color 0.2s var(--ease);
}
.footer-link:hover,
.footer-link:focus-visible { color: var(--cyan); }

.footer-line {
  display: grid;
  gap: 0.12rem;
}
.footer-key {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}
.footer-val {
  font-size: 0.85rem;
  line-height: 1.6;
  color: rgba(242, 233, 218, 0.88);
  word-break: break-word;
}

.footer-note {
  max-width: 34ch;
  margin-top: 0.9rem;
  font-size: 0.82rem;
  line-height: 1.72;
  color: rgba(242, 233, 218, 0.62);
}

.footer-icp {
  margin-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1.4rem;
  padding-block: 1.05rem 1.4rem;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--mist);
}
.footer-copy { color: rgba(242, 233, 218, 0.7); }
.footer-sign { color: var(--mist); }

/* ---------- 8. 通用组件 ---------- */
.panel {
  padding: clamp(1.1rem, 2.4vw, 1.9rem);
  background: rgba(15, 29, 51, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
}

.panel--paper {
  background: var(--paper);
  color: var(--paper-ink);
  border-color: rgba(23, 32, 42, 0.14);
  box-shadow: 0 24px 60px -34px rgba(0, 0, 0, 0.95);
}
.panel--paper .section-title,
.panel--paper h2,
.panel--paper h3,
.panel--paper .lede,
.panel--paper .note { color: var(--paper-ink); }
.panel--paper .note { color: rgba(23, 32, 42, 0.62); }
.panel--paper .divider { background: rgba(23, 32, 42, 0.16); }

.glass-panel {
  padding: clamp(1rem, 2vw, 1.6rem);
  background: rgba(46, 242, 208, 0.06);
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-panel);
}

.data-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.05rem 1.1rem 1.15rem;
  background: rgba(15, 29, 51, 0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}
.data-card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(46, 242, 208, 0) 72%);
}
.data-card:hover {
  border-color: var(--line-cyan);
  transform: translateY(-2px);
}

.data-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.data-card-value {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.data-card-label {
  font-size: 0.82rem;
  line-height: 1.55;
  color: rgba(242, 233, 218, 0.7);
}

.data-card-foot {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.round-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-width: 3.4rem;
  padding: 0.26rem 0.5rem;
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-sm);
  background: rgba(46, 242, 208, 0.12);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.6rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}
.status-pill::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.status-pill[data-state="live"] { color: var(--cyan); }
.status-pill[data-state="done"] { color: var(--green); }
.status-pill[data-state="warn"] { color: var(--orange); }
.status-pill[data-state="key"] { color: var(--saffron); }
.status-pill[data-state="gold"] { color: var(--gold); }

.tag {
  display: inline-block;
  padding: 0.16rem 0.5rem;
  border-radius: 3px;
  background: rgba(231, 183, 90, 0.14);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
}

/* 图像占位容器 */
.media {
  position: relative;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 78% 12%, rgba(46, 242, 208, 0.16), transparent 58%),
    linear-gradient(150deg, rgba(15, 29, 51, 0.95), rgba(11, 18, 32, 0.98) 62%, rgba(255, 122, 47, 0.12));
}
.media > img,
.media > picture > img {
  display: block;
  width: 100%;
  height: auto;
}

.media-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 78% 12%, rgba(46, 242, 208, 0.16), transparent 58%),
    linear-gradient(150deg, rgba(15, 29, 51, 0.95), rgba(11, 18, 32, 0.98) 62%, rgba(255, 122, 47, 0.12));
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame > img,
.media-frame > picture,
.media-frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-caption {
  margin-top: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--mist);
}

/* 横向赛程带 */
.schedule-strip {
  display: flex;
  gap: 0.75rem;
  overflow-x: auto;
  padding-bottom: 0.7rem;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}
.schedule-strip > * {
  flex: 0 0 auto;
  min-width: 14.5rem;
  scroll-snap-align: start;
}
.schedule-strip::-webkit-scrollbar { height: 6px; }
.schedule-strip::-webkit-scrollbar-track { background: rgba(127, 155, 184, 0.1); border-radius: 3px; }
.schedule-strip::-webkit-scrollbar-thumb { background: rgba(46, 242, 208, 0.35); border-radius: 3px; }

/* 筛选条 */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.filter-chip {
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--mist);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.filter-chip:hover {
  color: var(--paper);
  border-color: var(--line-cyan);
}
.filter-chip[aria-pressed="true"] {
  background: rgba(46, 242, 208, 0.14);
  border-color: var(--cyan);
  color: var(--cyan);
}

/* 表格 */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  -webkit-overflow-scrolling: touch;
}
.data-table {
  width: 100%;
  min-width: 34rem;
  font-size: 0.88rem;
}
.data-table th,
.data-table td {
  padding: 0.7rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--line-soft);
}
.data-table th {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
  background: rgba(11, 18, 32, 0.62);
  white-space: nowrap;
}
.data-table td {
  color: rgba(242, 233, 218, 0.84);
  font-variant-numeric: tabular-nums;
}
.data-table tbody tr:hover { background: rgba(46, 242, 208, 0.05); }
.data-table tbody tr:last-child td { border-bottom: 0; }

/* 面包屑 */
.breadcrumb {
  padding-block: 0.85rem;
  border-bottom: 1px solid var(--line-soft);
}
.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--mist);
}
.breadcrumb-list a { transition: color 0.2s var(--ease); }
.breadcrumb-list a:hover { color: var(--cyan); }
.breadcrumb-sep { color: rgba(127, 155, 184, 0.5); }
.breadcrumb-list [aria-current="page"] { color: var(--paper); }

/* 章节目录跟随 */
.section-nav {
  position: sticky;
  top: 7.5rem;
  align-self: start;
}
.section-nav-title {
  margin-bottom: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}
.section-nav-list {
  display: grid;
  gap: 0.1rem;
  border-left: 1px solid var(--line);
}
.section-nav-link {
  display: block;
  margin-left: -1px;
  padding: 0.42rem 0.8rem;
  border-left: 2px solid transparent;
  font-size: 0.85rem;
  line-height: 1.5;
  color: rgba(242, 233, 218, 0.62);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.section-nav-link:hover { color: var(--paper); }
.section-nav-link[aria-current="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

/* 阅读进度线 */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  height: 2px;
  pointer-events: none;
}
.scroll-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--cyan), var(--orange) 62%, var(--gold));
}

/* 返回顶部 */
.to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 110;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.58rem 0.9rem;
  border: 1px solid var(--line-cyan);
  border-radius: 999px;
  background: rgba(11, 18, 32, 0.94);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.24s var(--ease), transform 0.24s var(--ease), visibility 0.24s linear;
}
.to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1100px) {
  .footer-grid { grid-template-columns: 1.4fr 1fr 1.2fr; }
  .footer-legal { grid-column: 1 / -1; }
}

@media (max-width: 1000px) {
  .col-3,
  .col-4,
  .col-5 { grid-column: span 6; }
  .col-6 { grid-column: span 6; }
  .col-7,
  .col-8,
  .col-9 { grid-column: 1 / -1; }
  .section-nav { position: static; top: auto; }
}

@media (max-width: 900px) {
  .brand-tag { display: none; }
  .ribbon-status { font-size: 0.66rem; }

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

  .nav-inner { min-height: 54px; }

  .nav-panel {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    padding: 0.7rem var(--gutter) 1rem;
    background: var(--ink-deep);
    border-top: 1px solid var(--line-soft);
    border-bottom: 1px solid var(--line-cyan);
    box-shadow: 0 28px 44px -32px rgba(0, 0, 0, 0.95);
  }
  .site-header[data-open] .nav-panel { display: block; }

  .nav-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.1rem 0.9rem;
    margin-right: 0;
  }
  .nav-link {
    display: block;
    padding: 0.68rem 0.45rem;
    border-bottom: 1px solid var(--line-soft);
    font-size: 1rem;
  }
  .nav-link::after { display: none; }
  .nav-link[aria-current="page"] {
    border-left: 2px solid var(--cyan);
    padding-left: 0.6rem;
  }

  .nav-cta { margin-left: auto; padding: 0.46rem 0.75rem; font-size: 0.7rem; }
}

@media (max-width: 640px) {
  .grid--12 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .col-3,
  .col-4,
  .col-5,
  .col-6,
  .col-7,
  .col-8,
  .col-9 { grid-column: 1 / -1; }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.6rem;
  }
  .footer-legal { grid-column: auto; }
  .footer-note { max-width: none; }
  .footer-base { flex-direction: column; align-items: flex-start; }

  .nav-list { grid-template-columns: 1fr; }
  .ribbon-status .status-label { display: none; }
  .brand-name { font-size: 0.96rem; letter-spacing: 0.12em; }
  .data-card-value { font-size: 1.9rem; }
}

@media (max-width: 420px) {
  .nav-cta { display: none; }
}

/* ---------- 10. 减少动效 ---------- */
@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;
    scroll-behavior: auto !important;
  }
  .btn:hover,
  .data-card:hover,
  .brand:hover .brand-mark { transform: none; }
}