/* ===========================================================
   OB体育主站 · 共享样式表 /assets/site.css
   夜场记分牌：深墨绿结构 + 暖纸阅读区 + 亮橙行动色 + 电光蓝数据点
   =========================================================== */

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

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

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

ul, ol { list-style: none; }
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; width: 100%; }
[hidden] { display: none !important; }

/* ---------- 2. 变量 ---------- */
:root {
  /* 色板 */
  --ink: #0B241C;
  --ink-2: #12352A;
  --ink-3: #0E2C22;
  --paper: #F4EFE3;
  --paper-2: #FBF8F0;
  --orange: #FF6B2C;
  --orange-soft: #FFB07A;
  --blue: #2DD4FF;
  --slate: #1B2A33;
  --black: #07100D;
  --green: #4ADE80;
  --link: #0F5C74;

  /* 线条 */
  --line-light: rgba(27, 42, 51, 0.16);
  --line-light-2: rgba(27, 42, 51, 0.08);
  --line-dark: rgba(251, 248, 240, 0.16);

  /* 尺寸 */
  --rail-w: 272px;
  --topbar-h: 60px;
  --r-sm: 4px;
  --r-md: 10px;
  --r-lg: 18px;

  /* 阴影：极细边界 + 微阴影 */
  --shadow-1: 0 1px 0 rgba(7, 16, 13, 0.06), 0 14px 30px -24px rgba(7, 16, 13, 0.5);
  --shadow-2: 0 30px 70px -38px rgba(7, 16, 13, 0.65);

  /* 字体 */
  --f-sans: "HarmonyOS Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --f-mono: "JetBrains Mono", "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ease: cubic-bezier(0.22, 0.75, 0.25, 1);
}

/* ---------- 3. 中文排版基底 ---------- */
body {
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: var(--slate);
  background-color: var(--paper);
  background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0) 320px);
  min-height: 100vh;
  padding-top: var(--topbar-h);
  overflow-x: hidden;
}

@media (min-width: 1024px) {
  body {
    padding-top: 0;
    padding-left: var(--rail-w);
  }
}

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.h-display {
  font-size: clamp(2.5rem, 7vw, 5.5rem);
  line-height: 1.02;
  letter-spacing: -0.035em;
}
.h1 { font-size: clamp(2rem, 4.2vw, 2.75rem); }
.h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); }
.h3 { font-size: 1.25rem; letter-spacing: -0.01em; }

.lede {
  font-size: 1.0625rem;
  line-height: 1.78;
  color: rgba(27, 42, 51, 0.78);
  max-width: 60ch;
}

.mono {
  font-family: var(--f-mono);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
}

.prose {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: rgba(27, 42, 51, 0.86);
  max-width: 68ch;
}
.prose p + p { margin-top: 1em; }
.prose h2, .prose h3 { margin-top: 1.6em; margin-bottom: 0.5em; }
.prose a {
  color: var(--link);
  border-bottom: 1px solid rgba(45, 212, 255, 0.7);
}
.prose a:hover { color: var(--orange); border-bottom-color: var(--orange); }
.prose ul, .prose ol { margin: 1em 0 1em 1.1em; }
.prose ul li { list-style: none; position: relative; padding-left: 1.1em; }
.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 10px;
  height: 3px;
  background: var(--orange);
  transform: skewX(-30deg);
}
.prose ol { list-style: decimal; }

::selection { background: var(--orange); color: #1B0D05; }

/* ---------- 4. 焦点与可达性 ---------- */
:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
  border-radius: 3px;
}
.site-header :focus-visible,
.site-footer :focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 16px;
  font-weight: 700;
  font-size: 14px;
  color: #1B0D05;
  background: var(--orange);
  border-radius: var(--r-sm);
  transform: translateY(-200%);
  transition: transform 0.2s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- 5. 页头 / 侧边轨道 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  color: var(--paper);
  background-color: var(--ink);
  background-image:
    linear-gradient(180deg, rgba(45, 212, 255, 0.09), rgba(45, 212, 255, 0) 190px),
    linear-gradient(115deg, rgba(255, 107, 44, 0.12) 0 10%, rgba(255, 107, 44, 0) 10% 100%);
  border-bottom: 1px solid var(--line-dark);
}

.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: var(--topbar-h);
  padding: 0 16px;
}

.scroll-meter {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 120;
  background: rgba(244, 239, 227, 0.1);
  pointer-events: none;
}
.scroll-meter__fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--orange), var(--blue));
  transition: width 0.12s linear;
}

/* 品牌 */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.brand__mark {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  font-family: var(--f-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #1B0D05;
  background: linear-gradient(135deg, var(--orange), var(--orange-soft));
  clip-path: polygon(0 0, 100% 0, 100% 72%, 80% 100%, 0 100%);
  box-shadow: 0 10px 20px -14px rgba(255, 107, 44, 0.95);
}
.brand__text {
  display: flex;
  flex-direction: column;
  min-width: 0;
  line-height: 1.15;
}
.brand__name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--paper-2);
  white-space: nowrap;
}
.brand__sub {
  font-family: var(--f-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--orange-soft);
}

/* 当季状态点 */
.header-meta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 3px 9px;
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--blue);
  border: 1px solid rgba(45, 212, 255, 0.34);
  border-radius: 999px;
  white-space: nowrap;
}
.pulse {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.6);
  animation: pulse 2.4s var(--ease) infinite;
}
.pulse--blue { background: var(--blue); box-shadow: 0 0 0 0 rgba(45, 212, 255, 0.6); }
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.5); }
  70% { box-shadow: 0 0 0 9px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

/* 移动导航按钮 */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--paper);
  border: 1px solid rgba(244, 239, 227, 0.26);
  border-radius: var(--r-sm);
  transition: border-color 0.18s, color 0.18s, background 0.18s;
}
.nav-toggle:hover { border-color: var(--orange-soft); color: var(--orange-soft); }
.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 18px;
}
.nav-toggle__bars i {
  display: block;
  height: 2px;
  background: currentColor;
  transform: skewX(-24deg);
  transition: transform 0.24s var(--ease), opacity 0.2s;
}
.site-header[data-open] .nav-toggle__bars i:nth-child(1) { transform: translateY(6px) rotate(28deg); }
.site-header[data-open] .nav-toggle__bars i:nth-child(2) { opacity: 0; }
.site-header[data-open] .nav-toggle__bars i:nth-child(3) { transform: translateY(-6px) rotate(-28deg); }

/* 导航：移动抽屉 */
.site-nav {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  right: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-height: calc(100vh - var(--topbar-h));
  overflow: auto;
  padding: 20px 16px 24px;
  background: var(--ink-2);
  border-bottom: 1px solid var(--line-dark);
  box-shadow: var(--shadow-2);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-14px);
  transition: transform 0.32s var(--ease), opacity 0.24s var(--ease), visibility 0.32s;
}
.site-nav::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--orange) 0 30%, var(--blue) 30% 42%, rgba(244, 239, 227, 0.18) 42% 100%);
}
.site-header[data-open] .site-nav {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}
.site-header[data-open]::after {
  content: "";
  position: fixed;
  top: var(--topbar-h);
  right: 0;
  bottom: 0;
  left: 0;
  z-index: -1;
  background: rgba(7, 16, 13, 0.55);
  pointer-events: none;
}

.site-nav__label {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(244, 239, 227, 0.45);
}
.site-nav__list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.site-nav__link {
  display: grid;
  grid-template-columns: 26px 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 10px 10px 10px 8px;
  font-size: 15px;
  font-weight: 600;
  color: rgba(244, 239, 227, 0.74);
  border-left: 2px solid transparent;
  border-radius: var(--r-sm);
  transition: color 0.18s, background 0.18s, border-color 0.18s, transform 0.18s var(--ease);
}
.site-nav__link:hover {
  color: var(--paper-2);
  background: rgba(255, 255, 255, 0.06);
  border-left-color: var(--orange-soft);
  transform: translateX(2px);
}
.site-nav__index {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(45, 212, 255, 0.75);
}
.site-nav__mark {
  width: 16px;
  height: 2px;
  background: currentColor;
  transform: skewX(-30deg);
  opacity: 0.25;
  transition: opacity 0.18s, width 0.18s var(--ease);
}
.site-nav__link[aria-current="page"] {
  color: #1B0D05;
  background: linear-gradient(100deg, var(--orange) 0%, #FF8A4C 58%, var(--orange-soft) 100%);
  border-left-color: var(--paper-2);
  box-shadow: 0 12px 26px -18px rgba(255, 107, 44, 1);
}
.site-nav__link[aria-current="page"] .site-nav__index { color: rgba(27, 13, 5, 0.62); }
.site-nav__link[aria-current="page"] .site-nav__mark { opacity: 0.9; width: 24px; }

.site-nav__foot {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 4px;
  padding-top: 16px;
  border-top: 1px dashed rgba(244, 239, 227, 0.2);
}
.site-nav__note {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(244, 239, 227, 0.42);
}
.site-nav__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.site-nav__cta .btn { flex: 1 1 auto; }

@media (max-width: 419px) {
  .header-meta { display: none; }
}

@media (min-width: 1024px) {
  .site-header {
    right: auto;
    bottom: 0;
    width: var(--rail-w);
    border-bottom: 0;
    border-right: 1px solid var(--line-dark);
  }
  .site-header__bar {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 16px;
    height: auto;
    padding: 24px 20px 0;
  }
  .nav-toggle { display: none; }
  .site-header[data-open]::after { content: none; }
  .site-nav {
    position: static;
    flex: 1 1 auto;
    gap: 14px;
    max-height: none;
    overflow: auto;
    padding: 20px 20px 26px;
    background: transparent;
    border-bottom: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
    transition: none;
  }
  .site-nav::before { content: none; }
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: transform 0.16s var(--ease), background 0.18s, color 0.18s, border-color 0.18s, box-shadow 0.18s;
}
.btn--accent {
  color: #1B0D05;
  background: linear-gradient(100deg, var(--orange), #FF8A4C);
  box-shadow: 0 14px 26px -20px rgba(255, 107, 44, 1);
}
.btn--accent:hover { transform: translateY(-2px); box-shadow: 0 20px 32px -20px rgba(255, 107, 44, 1); }
.btn--ghost {
  color: var(--paper);
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(244, 239, 227, 0.28);
}
.btn--ghost:hover {
  color: var(--blue);
  border-color: var(--blue);
  background: rgba(45, 212, 255, 0.09);
}
.btn--light {
  color: var(--slate);
  background: var(--paper-2);
  border-color: var(--line-light);
}
.btn--light:hover { border-color: var(--orange); color: var(--orange); }
.btn--blue {
  color: #053A4A;
  background: rgba(45, 212, 255, 0.16);
  border-color: rgba(45, 212, 255, 0.55);
}
.btn--blue:hover { background: var(--blue); color: #053A4A; }
.btn--sm { padding: 10px 14px; font-size: 13px; }

/* ---------- 7. 布局容器与网格 ---------- */
.container {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 18px;
}
.container--narrow { max-width: 860px; }

@media (min-width: 720px) {
  .container { padding: 0 32px; }
}
@media (min-width: 1024px) {
  .container { max-width: 1240px; padding: 0 44px; }
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}
@media (min-width: 720px) {
  .grid-12 { grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 24px; }
}
@media (min-width: 1024px) {
  .grid-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 28px; }
}

.span-3, .span-4, .span-5, .span-6, .span-8, .span-12 { grid-column: 1 / -1; }
@media (min-width: 720px) {
  .span-3, .span-4, .span-5 { grid-column: span 4; }
  .span-6, .span-8 { grid-column: span 8; }
}
@media (min-width: 1024px) {
  .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-8 { grid-column: span 8; }
  .span-12 { grid-column: span 12; }
}

/* ---------- 8. 章节与斜切 ---------- */
.section { padding: 52px 0; }
.section--tight { padding: 32px 0; }
.section--paper { background: var(--paper); }
.section--paper-2 { background: var(--paper-2); }
.section--ink {
  background-color: var(--ink);
  background-image: linear-gradient(160deg, rgba(45, 212, 255, 0.08), rgba(45, 212, 255, 0) 55%);
  color: rgba(244, 239, 227, 0.82);
}
.section--ink h1,
.section--ink h2,
.section--ink h3 { color: var(--paper-2); }
.section--ink .lede,
.section--ink .prose { color: rgba(244, 239, 227, 0.78); }

@media (min-width: 720px) {
  .section { padding: 72px 0; }
  .section--tight { padding: 44px 0; }
}
@media (min-width: 1024px) {
  .section { padding: 90px 0; }
}

.slice {
  display: block;
  height: 64px;
  background: var(--ink);
  clip-path: polygon(0 0, 100% 62%, 100% 100%, 0 100%);
}
.slice--paper { background: var(--paper); }
.slice--up { clip-path: polygon(0 38%, 100% 0, 100% 100%, 0 100%); }

/* ---------- 9. 排版零件 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--orange);
}
.eyebrow::before {
  content: "";
  width: 26px;
  height: 3px;
  background: currentColor;
  transform: skewX(-30deg);
}
.section--ink .eyebrow { color: var(--orange-soft); }

.slash {
  display: block;
  width: 56px;
  height: 4px;
  background: var(--orange);
  transform: skewX(-30deg);
}
.rule {
  height: 1px;
  border: 0;
  background: var(--line-light);
}
.section--ink .rule { background: rgba(244, 239, 227, 0.18); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate);
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid var(--line-light);
  border-radius: 999px;
}
.tag--orange { color: #9C3410; background: rgba(255, 107, 44, 0.12); border-color: rgba(255, 107, 44, 0.5); }
.tag--blue { color: #075A72; background: rgba(45, 212, 255, 0.14); border-color: rgba(45, 212, 255, 0.5); }
.tag--green { color: #166534; background: rgba(74, 222, 128, 0.16); border-color: rgba(74, 222, 128, 0.5); }
.section--ink .tag,
.card--ink .tag {
  color: var(--paper);
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(244, 239, 227, 0.24);
}

.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__value {
  font-family: var(--f-mono);
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.stat__label {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(27, 42, 51, 0.55);
}
.section--ink .stat__value,
.card--ink .stat__value { color: var(--paper-2); }
.section--ink .stat__label,
.card--ink .stat__label { color: rgba(244, 239, 227, 0.55); }

/* 面包屑 */
.breadcrumbs {
  font-family: var(--f-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: rgba(27, 42, 51, 0.62);
}
.breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}
.breadcrumbs li { display: inline-flex; align-items: center; }
.breadcrumbs li + li::before {
  content: "/";
  display: inline-block;
  margin-right: 8px;
  color: var(--orange);
  transform: skewX(-12deg);
}
.breadcrumbs a:hover { color: var(--orange); }
.section--ink .breadcrumbs { color: rgba(244, 239, 227, 0.6); }

/* ---------- 10. 卡片 ---------- */
.card {
  position: relative;
  padding: 20px;
  background: var(--paper-2);
  border: 1px solid var(--line-light);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-1);
}
.card--ink {
  background: var(--ink-2);
  border-color: rgba(244, 239, 227, 0.14);
  color: rgba(244, 239, 227, 0.84);
}
.card--ink h3 { color: var(--paper-2); }
.card--accent { border-top: 3px solid var(--orange); }
@media (min-width: 720px) {
  .card { padding: 24px; }
}

/* ---------- 11. 图片容器（供页面阶段放图） ---------- */
.media {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--ink-2);
  border: 1px solid rgba(7, 16, 13, 0.14);
  border-radius: var(--r-md);
}
.media > img,
.media > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media__ph {
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(135deg, rgba(45, 212, 255, 0.12) 0 2px, rgba(45, 212, 255, 0) 2px 13px),
    radial-gradient(120% 90% at 18% 12%, rgba(255, 107, 44, 0.28), rgba(255, 107, 44, 0) 58%),
    radial-gradient(120% 90% at 82% 88%, rgba(45, 212, 255, 0.22), rgba(45, 212, 255, 0) 60%),
    linear-gradient(160deg, var(--ink-2), var(--ink) 70%, var(--black));
}
.media__label {
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  padding: 5px 9px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--paper-2);
  background: rgba(7, 16, 13, 0.62);
  border: 1px solid rgba(244, 239, 227, 0.2);
  border-radius: 3px;
}
.media--wide { aspect-ratio: 16 / 9; }
.media--pano { aspect-ratio: 21 / 9; }
.media--tall { aspect-ratio: 3 / 4; }
.media--square { aspect-ratio: 1 / 1; }
.media--cut { clip-path: polygon(0 0, 100% 0, 100% 88%, 95% 100%, 0 100%); }

/* ---------- 12. 可展开组 ---------- */
.expand {
  background: var(--paper-2);
  border: 1px solid var(--line-light);
  border-radius: var(--r-md);
  overflow: hidden;
}
.expand + .expand { margin-top: 10px; }
.expand__btn {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  text-align: left;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  transition: background 0.18s;
}
.expand__btn:hover { background: rgba(255, 107, 44, 0.07); }
.expand__icon {
  position: relative;
  flex: 0 0 auto;
  width: 20px;
  height: 20px;
}
.expand__icon::before,
.expand__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--orange);
  transform: translate(-50%, -50%);
}
.expand__icon::before { width: 14px; height: 2px; }
.expand__icon::after {
  width: 2px;
  height: 14px;
  transition: transform 0.24s var(--ease), opacity 0.2s;
}
.expand[data-open] .expand__icon::after { transform: translate(-50%, -50%) scaleY(0); opacity: 0; }
.expand__panel { display: none; padding: 0 18px 18px; }
.expand[data-open] .expand__panel { display: block; }

/* ---------- 13. 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  color: rgba(244, 239, 227, 0.78);
  background-color: var(--ink);
  border-top: 1px solid rgba(244, 239, 227, 0.14);
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--orange) 0 18%, var(--blue) 18% 27%, rgba(244, 239, 227, 0.18) 27% 100%);
}
.site-footer::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(115deg, rgba(255, 107, 44, 0.06) 0 1px, rgba(255, 107, 44, 0) 1px 92px);
}

.site-footer__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px 28px;
  max-width: 1240px;
  margin: 0 auto;
  padding: 54px 18px 32px;
}
@media (min-width: 720px) {
  .site-footer__grid { grid-template-columns: 1.5fr 1fr 1fr; padding: 64px 32px 34px; }
}
@media (min-width: 1024px) {
  .site-footer__grid { grid-template-columns: 1.6fr 1fr 1fr 1.15fr; gap: 40px; padding: 72px 44px 38px; }
}

.brand--footer { margin-bottom: 14px; }
.site-footer__desc {
  max-width: 34ch;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(244, 239, 227, 0.66);
}
.site-footer__status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding: 4px 10px;
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--blue);
  border: 1px solid rgba(45, 212, 255, 0.32);
  border-radius: 999px;
}

.site-footer__title {
  margin-bottom: 14px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--orange-soft);
}

.footer-list { display: flex; flex-direction: column; gap: 9px; }
.footer-list a {
  display: inline-block;
  font-size: 0.9375rem;
  color: rgba(244, 239, 227, 0.74);
  transition: color 0.16s, transform 0.16s var(--ease);
}
.footer-list a:hover { color: var(--paper-2); transform: translateX(3px); }

.contact-list { display: flex; flex-direction: column; gap: 12px; }
.contact-list li { display: flex; flex-direction: column; gap: 2px; }
.contact-list__key {
  font-family: var(--f-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(244, 239, 227, 0.45);
}
.contact-list__val {
  font-family: var(--f-mono);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--paper-2);
  word-break: break-word;
}
.contact-list__note {
  margin-top: 14px;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: rgba(244, 239, 227, 0.5);
}

.site-footer__base {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 20px;
  max-width: 1240px;
  margin: 0 auto;
  padding: 18px 18px 30px;
  border-top: 1px dashed rgba(244, 239, 227, 0.2);
}
@media (min-width: 720px) {
  .site-footer__base { padding: 20px 32px 34px; }
}
@media (min-width: 1024px) {
  .site-footer__base { padding: 22px 44px 40px; }
}
.site-footer__legal {
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: rgba(244, 239, 227, 0.56);
}
.site-footer__legal .mono { color: rgba(244, 239, 227, 0.72); }
.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}
.site-footer__links a {
  font-size: 0.8125rem;
  color: rgba(244, 239, 227, 0.68);
  border-bottom: 1px solid transparent;
  transition: color 0.16s, border-color 0.16s;
}
.site-footer__links a:hover { color: var(--blue); border-bottom-color: var(--blue); }

/* ---------- 14. 显现动效 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
}
[data-reveal] {
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 15. 减少动态偏好 ---------- */
@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;
  }
  .pulse { animation: none; }
  .js [data-reveal],
  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .nav-toggle:hover,
  .footer-list a:hover,
  .site-nav__link:hover { transform: none; }
}