/* ==========================================================================
   云开体育 · 共享站点样式 /assets/site.css
   北疆夜赛数据现场：深蓝底、信号橙焦点、薄荷绿数据、金属银正文
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scrollbar-color: #17284A #070E1F;
}

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

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

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

button, input, select, textarea { font: inherit; color: inherit; background: none; }

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

table { border-collapse: collapse; }

/* ---------- 2. 变量 ---------- */
:root {
  --void: #070E1F;
  --deep: #0E1A33;
  --glass: #17284A;
  --glass-bg: rgba(23, 40, 74, 0.62);
  --signal: #FF6B2C;
  --signal-soft: #FFB27A;
  --mint: #4FE0B5;
  --mint-deep: #1B9E7C;
  --silver: #C9D2E0;
  --silver-dim: #8A94A6;
  --white: #F4F7FB;
  --ink: #08101F;
  --line: rgba(201, 210, 224, 0.14);
  --line-strong: rgba(201, 210, 224, 0.30);
  --radius: 4px;
  --shell: 1240px;
  --gutter: clamp(20px, 5vw, 56px);

  --font-display: "Archivo Narrow", "Oswald", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --font-body: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background: var(--void);
  color: var(--silver);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.8;
  letter-spacing: 0.01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 42% at 80% 6%, rgba(255, 107, 44, 0.10), transparent 70%),
    radial-gradient(52% 46% at 10% 90%, rgba(79, 224, 181, 0.08), transparent 72%);
}

body.nav-open { overflow: hidden; }

main { position: relative; z-index: 1; }

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.24;
  color: var(--white);
}

p { max-width: 68ch; }

strong { color: var(--white); font-weight: 700; }

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

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

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -120px;
  z-index: 80;
  padding: 10px 16px;
  border-radius: 3px;
  background: var(--signal);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  transition: top 0.2s ease;
}

.skip-link:focus { top: 10px; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---------- 4. 版式工具 ---------- */
.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.t-display {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 8vw, 128px);
  line-height: 0.94;
  letter-spacing: -0.02em;
  color: var(--white);
}

.t-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 48px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--white);
}

.t-sub {
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.75;
  color: var(--silver);
}

.t-index {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--silver-dim);
}

.num-xl {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(52px, 11vw, 168px);
  line-height: 0.82;
  letter-spacing: -0.03em;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.is-signal { color: var(--signal); }
.is-mint { color: var(--mint); }
.is-dim { color: var(--silver-dim); }

/* ---------- 5. 布局容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(48px, 8vw, 110px); }

.section__head { margin-bottom: clamp(24px, 4vw, 48px); }

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2.4vw, 28px);
}

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

.slant-block {
  position: relative;
  padding: clamp(28px, 5vw, 64px);
  background: var(--glass-bg);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 5%, 100% 100%, 0 95%);
}

.breadcrumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--silver-dim);
  margin-top: clamp(20px, 3vw, 32px);
}

.breadcrumbs__list { display: flex; flex-wrap: wrap; align-items: center; }

.breadcrumbs__item:not(:last-child)::after {
  content: "/";
  margin-inline: 8px;
  color: rgba(138, 148, 166, 0.6);
}

.breadcrumbs__link { color: var(--silver-dim); transition: color 0.2s ease; }
.breadcrumbs__link:hover { color: var(--signal); }

/* ---------- 6. 按钮与标签 ---------- */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--white);
  --btn-bd: var(--line-strong);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  border: 1px solid var(--btn-bd);
  border-radius: 3px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: transform 0.18s ease, background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.btn:hover { transform: translateY(-2px); }
.btn:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; }

.btn--signal {
  --btn-bg: var(--signal);
  --btn-fg: var(--ink);
  --btn-bd: var(--signal);
  font-weight: 700;
}

.btn--signal:hover {
  --btn-bg: var(--signal-soft);
  --btn-bd: var(--signal-soft);
}

.btn--ghost:hover {
  --btn-bd: var(--signal);
  --btn-fg: var(--signal);
}

.btn--sm { padding: 8px 14px; font-size: 11.5px; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--silver-dim);
}

.tag--signal { border-color: rgba(255, 107, 44, 0.5); color: var(--signal); }
.tag--mint { border-color: rgba(79, 224, 181, 0.45); color: var(--mint); }

/* ---------- 7. 面板与卡片 ---------- */
.panel {
  background: var(--deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 32px);
}

.panel--glass {
  background: var(--glass-bg);
  border-color: var(--line-strong);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.card {
  background: var(--deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(18px, 2.4vw, 26px);
  transition: border-color 0.2s ease, transform 0.2s ease, background-color 0.2s ease;
}

.card:hover {
  border-color: var(--signal);
  transform: translateY(-4px);
  background: #101D38;
}

.card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.card__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.02em;
}

.card__body { color: var(--silver); font-size: 15px; }

.card__meta {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--silver-dim);
}

/* ---------- 8. 数字与图表 ---------- */
.stat { display: flex; flex-direction: column; gap: 6px; }

.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.6vw, 46px);
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.stat__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--silver-dim);
}

.bar-chart { display: grid; gap: 10px; }

.bar-chart__row {
  display: grid;
  grid-template-columns: minmax(72px, 124px) 1fr auto;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--silver);
}

.bar-chart__label { color: var(--silver-dim); }

.bar-chart__track {
  height: 8px;
  background: rgba(201, 210, 224, 0.10);
  border-radius: 999px;
  overflow: hidden;
}

.bar-chart__fill {
  height: 100%;
  width: var(--value, 50%);
  border-radius: 999px;
  background: linear-gradient(90deg, var(--mint-deep), var(--mint));
  transition: width 0.4s ease;
}

.bar-chart__row--signal .bar-chart__fill {
  background: linear-gradient(90deg, #A8380F, var(--signal));
}

/* ---------- 9. 表格 ---------- */
.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(14, 26, 51, 0.6);
}

.data-table {
  width: 100%;
  min-width: 520px;
  font-variant-numeric: tabular-nums;
}

.data-table th {
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--silver-dim);
  border-bottom: 1px solid var(--line-strong);
  white-space: nowrap;
}

.data-table td {
  padding: 13px 14px;
  font-size: 14.5px;
  color: var(--silver);
  border-bottom: 1px solid var(--line);
}

.data-table tbody tr { transition: background-color 0.18s ease; }
.data-table tbody tr:hover { background: var(--glass-bg); }
.data-table td.is-signal { color: var(--signal); }
.data-table td.is-mint { color: var(--mint); }
.data-table td[data-delta="up"] { color: var(--mint); }
.data-table td[data-delta="down"] { color: var(--signal); }

/* ---------- 10. 章节编号 ---------- */
.chapter {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 24px);
}

.chapter__index {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 64px);
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: var(--silver-dim);
  opacity: 0.45;
  transition: color 0.3s ease, opacity 0.3s ease;
}

.chapter__index.is-active {
  color: var(--signal);
  opacity: 1;
}

.chapter__title {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

/* ---------- 11. 图片容器基础规则 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(70% 60% at 30% 20%, rgba(23, 40, 74, 0.9), rgba(7, 14, 31, 1));
}

.media-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(7, 14, 31, 0) 42%, rgba(7, 14, 31, 0.78) 100%);
}

.media-frame__img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.media-frame--wide .media-frame__img { aspect-ratio: 16 / 9; }
.media-frame--tall .media-frame__img { aspect-ratio: 3 / 4; }
.media-frame--pano .media-frame__img { aspect-ratio: 21 / 9; }

.media-frame--heat::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  mix-blend-mode: screen;
  background:
    radial-gradient(38% 52% at 28% 62%, rgba(255, 107, 44, 0.42), transparent 70%),
    radial-gradient(30% 44% at 64% 34%, rgba(79, 224, 181, 0.34), transparent 72%),
    repeating-linear-gradient(90deg, rgba(201, 210, 224, 0.10) 0 1px, transparent 1px 44px),
    repeating-linear-gradient(0deg, rgba(201, 210, 224, 0.10) 0 1px, transparent 1px 44px);
}

.media-frame__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 4;
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--silver);
}

/* ---------- 12. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(7, 14, 31, 0.86);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.site-header[data-scrolled] {
  background: rgba(7, 14, 31, 0.97);
  border-bottom-color: var(--line-strong);
}

.scroll-meter {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  overflow: hidden;
  pointer-events: none;
}

.scroll-meter__fill {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--mint), var(--signal));
  transition: transform 0.12s linear;
}

.header-rail {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(10px, 1.6vw, 16px) var(--gutter);
  display: flex;
  align-items: center;
  gap: clamp(14px, 2.4vw, 32px);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-right: auto;
  min-width: 0;
}

.brand__mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.2vw, 26px);
  line-height: 1.1;
  letter-spacing: 0.16em;
  color: var(--white);
  transition: color 0.2s ease;
}

.brand__mark:hover { color: var(--signal-soft); }

.brand__glyph {
  flex: none;
  width: 10px;
  height: 10px;
  background: var(--signal);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.brand__season {
  display: flex;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--silver-dim);
}

.brand__season b { font-weight: 500; color: var(--mint); }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.8vw, 24px);
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding-block: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--silver);
  transition: color 0.2s ease;
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.28s ease;
}

.site-nav__link:hover { color: var(--white); }
.site-nav__link:hover::after { transform: scaleX(1); }

.site-nav__index {
  font-size: 10px;
  color: var(--silver-dim);
  transition: color 0.2s ease;
}

.site-nav__link[aria-current="page"] { color: var(--white); }
.site-nav__link[aria-current="page"] .site-nav__index { color: var(--signal); }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); }

.header-cta {
  flex: none;
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  border: 1px solid var(--signal);
  border-radius: 3px;
  background: var(--signal);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  white-space: nowrap;
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.header-cta:hover {
  background: var(--signal-soft);
  border-color: var(--signal-soft);
  transform: translateY(-2px);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  color: var(--silver);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.nav-toggle:hover { border-color: var(--signal); 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: 1.5px;
  background: currentColor;
  transition: transform 0.25s ease, top 0.25s ease, bottom 0.25s ease;
}

.nav-toggle__bars::before { top: 1px; }
.nav-toggle__bars::after { bottom: 1px; }

.site-header[data-open] .nav-toggle { border-color: var(--signal); color: var(--signal); }
.site-header[data-open] .nav-toggle__bars::before { top: 4px; transform: rotate(45deg); }
.site-header[data-open] .nav-toggle__bars::after { bottom: 4.5px; transform: rotate(-45deg); }

.season-rail {
  max-width: var(--shell);
  margin-inline: auto;
  padding: 0 var(--gutter) clamp(8px, 1.2vw, 12px);
  display: flex;
  align-items: center;
  gap: 12px;
}

.season-rail__label {
  flex: none;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--silver-dim);
}

.season-rail__track {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 3px;
  scrollbar-width: thin;
}

.season-rail__track::-webkit-scrollbar { height: 3px; }
.season-rail__track::-webkit-scrollbar-track { background: transparent; }
.season-rail__track::-webkit-scrollbar-thumb { background: var(--glass); }

.season-chip {
  flex: none;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: transparent;
  color: var(--silver-dim);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.season-chip:hover { color: var(--white); border-color: var(--line-strong); }

.season-chip[aria-pressed="true"] {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 13. 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(64px, 10vw, 140px);
  background: var(--deep);
  border-top: 1px solid var(--signal);
}

.footer-inner {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) var(--gutter) clamp(28px, 4vw, 44px);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: clamp(24px, 4vw, 40px);
  border-bottom: 1px solid var(--line);
}

.footer-brand__mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 42px);
  letter-spacing: 0.14em;
  line-height: 1.1;
  color: var(--white);
  transition: color 0.2s ease;
}

.footer-brand__mark:hover { color: var(--signal-soft); }

.footer-brand__line {
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--silver);
}

.footer-brand__meta {
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--silver-dim);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 40px);
  padding-top: clamp(28px, 4vw, 44px);
}

.footer-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--white);
}

.footer-col__list { display: grid; gap: 9px; }

.footer-col__link {
  position: relative;
  display: inline-block;
  font-size: 14px;
  color: var(--silver-dim);
  transition: color 0.2s ease;
}

.footer-col__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: var(--signal);
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.26s ease;
}

.footer-col__link:hover { color: var(--white); }
.footer-col__link:hover::after { transform: scaleX(1); }

.footer-contact { display: grid; gap: 12px; }
.footer-contact__item { display: grid; gap: 3px; }

.footer-contact__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--silver-dim);
}

.footer-contact__value {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--silver);
  word-break: break-word;
}

.footer-contact__note {
  max-width: 30ch;
  font-size: 12px;
  line-height: 1.7;
  color: var(--silver-dim);
}

.footer-legal {
  max-width: var(--shell);
  margin-inline: auto;
  padding: clamp(16px, 2.4vw, 24px) var(--gutter) clamp(24px, 4vw, 40px);
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--silver-dim);
}

.footer-legal__copy { margin-right: auto; }
.footer-legal__links { display: flex; flex-wrap: wrap; gap: 18px; }

.footer-legal__link { color: var(--silver-dim); transition: color 0.2s ease; }
.footer-legal__link:hover { color: var(--signal); }

.footer-legal__icp { color: var(--silver-dim); }

/* ---------- 14. 平板 ---------- */
@media (max-width: 1080px) {
  .grid-12 { gap: 18px; }
  .span-5, .span-7 { grid-column: span 6; }
}

/* ---------- 15. 移动端导航 ---------- */
@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    z-index: 4;
    width: min(86vw, 340px);
    padding: 96px 26px 40px;
    overflow-y: auto;
    background: var(--deep);
    border-left: 1px solid var(--line-strong);
    transform: translateX(102%);
    transition: transform 0.34s cubic-bezier(0.22, 0.7, 0.24, 1);
  }

  .site-nav[data-open] { transform: translateX(0); }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__link {
    width: 100%;
    padding: 14px 4px;
    font-size: 14px;
    border-bottom: 1px solid var(--line);
  }

  .site-nav__link::after { display: none; }

  .site-nav__link[aria-current="page"] { padding-left: 12px; }

  .site-nav__link[aria-current="page"]::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 3px;
    height: 18px;
    transform: translateY(-50%);
    background: var(--signal);
  }

  .site-header[data-open]::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 1;
    background: rgba(4, 8, 18, 0.72);
  }

  .header-rail { position: relative; z-index: 3; }
  .nav-toggle { position: relative; z-index: 5; }

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

  .span-3, .span-4, .span-5, .span-6, .span-7, .span-8, .span-12 {
    grid-column: 1 / -1;
  }
}

/* ---------- 16. 手机 ---------- */
@media (max-width: 640px) {
  body { font-size: 15.5px; line-height: 1.78; }

  .header-cta {
    padding: 8px 10px;
    font-size: 10.5px;
    letter-spacing: 0.06em;
  }

  .nav-toggle { padding: 8px 10px; }
  .brand__season { font-size: 10px; letter-spacing: 0.1em; }

  .season-rail { gap: 8px; }
  .season-chip { padding: 5px 10px; font-size: 11px; }

  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .footer-legal { flex-direction: column; align-items: flex-start; gap: 8px; }
  .footer-legal__copy { margin-right: 0; }

  .bar-chart__row { grid-template-columns: minmax(62px, 96px) 1fr auto; font-size: 11.5px; }
}

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

/* ---------- 17. 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }

  .card:hover,
  .btn:hover,
  .header-cta:hover,
  .footer-brand__mark:hover { transform: none; }
}