/* ==========================================================================
   FB体育看台 · /assets/site.css
   共享外壳：变量 / 排版 / 头部 / 页脚 / 基础组件
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  --navy: #0A1E3C;
  --abyss: #050F20;
  --stand: #12325C;
  --line: #24406B;
  --paper: #F2F6FC;
  --mist: #93A4C0;
  --orange: #FF6B1A;
  --green: #00E676;
  --cyan: #22D3EE;
  --amber: #FFC24B;
  --soft: #C9D6EA;

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

  --shell: 1400px;
  --gutter: clamp(1rem, 3.5vw, 3rem);
  --gap: clamp(0.75rem, 1.4vw, 1.25rem);
  --radius: 4px;
  --pad-card: clamp(1rem, 1.8vw, 1.6rem);

  --header-h: 88px;
  --header-h-condensed: 56px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dur: 200ms;
}

/* ---------- 2. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  background-color: var(--abyss);
}

body {
  margin: 0;
  min-height: 100%;
  background-color: var(--navy);
  background-image:
    linear-gradient(to right, rgba(36, 64, 107, 0.22) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 64, 107, 0.22) 1px, transparent 1px);
  background-size: 72px 72px;
  background-attachment: fixed;
  color: var(--paper);
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: 0; }
a { color: inherit; }

/* ---------- 3. 基础排版 ---------- */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.display {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 0.98;
  letter-spacing: -0.02em;
}

.section-title {
  font-size: clamp(1.5rem, 2.6vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
}

.label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.lead {
  font-size: clamp(1.0625rem, 1.5vw, 1.25rem);
  line-height: 1.7;
  color: var(--soft);
  max-width: 30em;
}

.prose { max-width: 34em; }
.prose p { margin-bottom: 1em; }
.prose p:last-child { margin-bottom: 0; }
.prose h2,
.prose h3 { margin: 1.6em 0 0.6em; }
.prose ul,
.prose ol { margin: 0 0 1em; padding-left: 1.2em; list-style: disc; }
.prose a { color: var(--cyan); }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.01em;
}

.divider {
  height: 1px;
  border: 0;
  background: var(--line);
  margin: clamp(2rem, 5vw, 3.5rem) 0;
}

/* ---------- 4. 容器与网格 ---------- */
.shell {
  width: min(var(--shell), calc(100% - var(--gutter) * 2));
  margin-inline: auto;
}

.bento {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

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

@media (max-width: 1024px) {
  .b-3, .b-4, .b-5 { grid-column: span 6; }
  .b-7, .b-8, .b-9 { grid-column: span 12; }
}

@media (max-width: 700px) {
  .bento > * { grid-column: span 12; }
}

/* ---------- 5. 卡片组件 ---------- */
.card {
  position: relative;
  min-width: 0;
  padding: var(--pad-card);
  background: var(--stand);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 5px 5px 0 0 rgba(5, 15, 32, 0.75);
}

.card--focus { border-color: rgba(255, 107, 26, 0.55); }

.card--flat {
  background: transparent;
  box-shadow: none;
}

/* ---------- 6. 标签与徽章 ---------- */
.tag,
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1;
  border-radius: 2px;
  white-space: nowrap;
}

.tag {
  padding: 0.34rem 0.55rem;
  color: var(--mist);
  border: 1px solid var(--line);
  background: rgba(5, 15, 32, 0.5);
}

.tag--accent { color: var(--orange); border-color: rgba(255, 107, 26, 0.45); }
.tag--live { color: var(--green); border-color: rgba(0, 230, 118, 0.45); }
.tag--beta { color: var(--amber); border-color: rgba(255, 194, 75, 0.45); }

.badge {
  padding: 0.28rem 0.48rem;
  color: var(--mist);
  border: 1px solid var(--line);
}

.badge--version {
  color: var(--green);
  border-color: rgba(0, 230, 118, 0.5);
  background: rgba(0, 230, 118, 0.08);
}

.badge--beta {
  color: var(--amber);
  border-color: rgba(255, 194, 75, 0.5);
  background: rgba(255, 194, 75, 0.08);
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.62rem 1.05rem;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.02em;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              color var(--dur) var(--ease);
}

.btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #08152B;
}

.btn--primary:hover { background: #FF8140; border-color: #FF8140; }

.btn--ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--paper);
}

.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }

.btn--link {
  padding: 0.4rem 0.15rem;
  background: none;
  color: var(--mist);
}

.btn--link:hover { color: var(--cyan); }

/* ---------- 8. 跳转链接与焦点 ---------- */
.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -120px;
  z-index: 120;
  padding: 0.6rem 1rem;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: #08152B;
  background: var(--orange);
  border-radius: 0 0 var(--radius) var(--radius);
  transition: top var(--dur) var(--ease);
}

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

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

/* ---------- 9. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  isolation: isolate;
  background: var(--abyss);
  border-bottom: 1px solid var(--line);
  color: var(--paper);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(36, 64, 107, 0.55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 64, 107, 0.55) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.4;
  -webkit-mask-image: linear-gradient(90deg, #000 0%, transparent 62%);
  mask-image: linear-gradient(90deg, #000 0%, transparent 62%);
}

.site-header__progress {
  position: absolute;
  left: 0;
  bottom: -1px;
  z-index: 2;
  width: 0;
  height: 2px;
  background: var(--orange);
  box-shadow: 0 0 12px rgba(255, 107, 26, 0.7);
  transition: width 120ms linear;
}

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.4vw, 2.75rem);
  min-height: var(--header-h);
  padding-block: 0.85rem;
  transition: min-height var(--dur) var(--ease), padding-block var(--dur) var(--ease);
}

/* 品牌 */
.brand {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
}

.brand__line {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.brand__mark {
  display: inline-flex;
  align-items: center;
  font-size: clamp(1.05rem, 1.7vw, 1.3rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--paper);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), font-size var(--dur) var(--ease);
}

.brand__mark::before {
  content: "";
  display: inline-block;
  width: 0.48em;
  height: 0.48em;
  margin-right: 0.45em;
  background: var(--orange);
  transform: translateY(-0.06em);
}

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

.brand__tag {
  overflow: hidden;
  max-height: 24px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  white-space: nowrap;
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

/* 导航 */
.site-nav { margin-left: auto; }

.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(0.6rem, 1.6vw, 1.6rem);
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.55rem 0.1rem;
  font-size: 15px;
  font-weight: 600;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), padding-block var(--dur) var(--ease), font-size var(--dur) var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0.08rem;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

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

.site-nav__link[aria-current="page"] { color: var(--paper); }
.site-nav__link[aria-current="page"]::after { transform: scaleX(1); background: var(--orange); }

.site-nav__foot { display: none; }

/* 头部动作区 */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

/* 移动目录按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.55rem;
  margin-left: auto;
  padding: 0.6rem 0.75rem;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--paper);
  background: rgba(18, 50, 92, 0.6);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.nav-toggle__grid {
  display: grid;
  grid-template-columns: repeat(2, 6px);
  gap: 3px;
}

.nav-toggle__grid i {
  display: block;
  width: 6px;
  height: 6px;
  background: var(--orange);
  border-radius: 1px;
  transition: background-color var(--dur) var(--ease);
}

.nav-toggle:hover { border-color: var(--cyan); }

.site-header[data-open] .nav-toggle {
  color: var(--green);
  border-color: rgba(0, 230, 118, 0.55);
}

.site-header[data-open] .nav-toggle__grid i { background: var(--green); }

/* 收拢状态 */
.site-header.is-condensed .site-header__inner {
  min-height: var(--header-h-condensed);
  padding-block: 0.25rem;
}

.site-header.is-condensed .brand__mark { font-size: 1rem; }

.site-header.is-condensed .brand__tag {
  max-height: 0;
  opacity: 0;
}

.site-header.is-condensed .site-nav__link {
  padding-block: 0.3rem;
  font-size: 14px;
}

.site-header.is-condensed .btn { padding-block: 0.45rem; }

@media (max-width: 1180px) {
  .brand__tag { display: none; }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .site-header__actions { display: none; }

  .site-nav {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 70;
    margin: 0;
    padding: calc(var(--header-h-condensed) + 2.25rem) var(--gutter) 3rem;
    background: var(--navy);
    background-image:
      linear-gradient(to right, rgba(36, 64, 107, 0.28) 1px, transparent 1px),
      linear-gradient(to bottom, rgba(36, 64, 107, 0.28) 1px, transparent 1px);
    background-size: 56px 56px;
    overflow-y: auto;
  }

  .site-header[data-open] .site-nav { display: block; }

  .site-nav__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.65rem;
    counter-reset: navitem;
  }

  .site-nav__link {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: flex-start;
    min-height: 82px;
    padding: 1rem;
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--paper);
    background: var(--stand);
    border: 1px solid var(--line);
    border-radius: var(--radius);
  }

  .site-nav__link::before {
    counter-increment: navitem;
    content: counter(navitem, decimal-leading-zero);
    margin-bottom: 0.4rem;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--orange);
  }

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

  .site-nav__link[aria-current="page"] {
    border-color: var(--orange);
    box-shadow: 0 0 0 1px rgba(255, 107, 26, 0.35) inset;
  }

  .site-nav__foot {
    display: grid;
    gap: 0.65rem;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 560px) {
  .site-nav__list { grid-template-columns: 1fr; }
  .site-nav__link { min-height: 64px; }
}

/* ---------- 10. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(2rem, 6vw, 5rem);
  background: var(--abyss);
  border-top: 1px solid var(--line);
  color: var(--paper);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(36, 64, 107, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 64, 107, 0.5) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.3;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 62%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 62%);
}

.site-footer > .shell {
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.85fr 1fr 1.15fr;
  gap: clamp(1.5rem, 3vw, 3rem);
  padding-block: clamp(2.25rem, 5vw, 3.5rem) clamp(1.5rem, 3vw, 2.5rem);
}

.footer-col { min-width: 0; }
.footer-col--brand { max-width: 26em; }

.footer-wordmark {
  margin-bottom: 0.55rem;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  font-weight: 900;
  letter-spacing: -0.01em;
}

.footer-lede {
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.footer-title {
  margin-bottom: 0.9rem;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--mist);
}

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

.footer-list a {
  font-size: 14px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.footer-list a:hover {
  color: var(--cyan);
  border-bottom-color: rgba(34, 211, 238, 0.5);
}

.footer-contact {
  display: grid;
  gap: 0.6rem;
  justify-items: start;
}

.footer-meta {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.copyable {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.36rem 0.6rem;
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  color: var(--paper);
  background: rgba(18, 50, 92, 0.5);
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.copyable:hover {
  color: var(--cyan);
  border-color: rgba(34, 211, 238, 0.6);
}

.copyable[data-copied] { border-style: solid; border-color: rgba(0, 230, 118, 0.6); }

.copyable[data-copied]::after {
  content: "已复制";
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--green);
}

.footer-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.75rem;
  padding-block: 1rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.footer-stats b {
  font-weight: 600;
  color: var(--paper);
}

.footer-base {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-block: 1.25rem 2rem;
  font-size: 13px;
  color: var(--mist);
}

.footer-copy { font-size: 13px; }

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.footer-legal a {
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.footer-legal a:hover { color: var(--cyan); }

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- 11. 数据与索引组件 ---------- */
.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18, 50, 92, 0.35);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.data-table th {
  padding: 0.75rem 0.85rem;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-align: left;
  white-space: nowrap;
  color: var(--mist);
  border-bottom: 1px solid var(--line);
}

.data-table td {
  padding: 0.75rem 0.85rem;
  color: var(--paper);
  border-bottom: 1px solid rgba(36, 64, 107, 0.6);
}

.data-table tbody tr:nth-child(even) { background: rgba(18, 50, 92, 0.45); }
.data-table tbody tr:last-child td { border-bottom: 0; }
.data-table .num { text-align: right; font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.stat {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.stat__value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.stat__label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.index-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding: 0.6rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.index-bar__link {
  padding: 0.35rem 0.75rem;
  font-size: 13px;
  font-weight: 600;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.index-bar__link:hover {
  color: var(--paper);
  border-color: var(--line);
}

.index-bar__link.is-active {
  color: var(--orange);
  border-color: rgba(255, 107, 26, 0.5);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.6rem;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb__sep { color: var(--line); }

/* ---------- 12. 图片容器 ---------- */
.figure {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(155deg, var(--stand), var(--abyss));
}

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

.figure--16x9 { aspect-ratio: 16 / 9; }
.figure--4x3 { aspect-ratio: 4 / 3; }
.figure--1x1 { aspect-ratio: 1 / 1; }
.figure--tall { aspect-ratio: 3 / 4; }

.figure--diag::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(115deg, rgba(34, 211, 238, 0.16) 0 1px, transparent 1px 26px);
}

.figure--ph {
  display: grid;
  place-items: center;
  color: var(--line);
}

.figure--ph::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(36, 64, 107, 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 64, 107, 0.6) 1px, transparent 1px);
  background-size: 32px 32px;
}

.figure__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0.7rem 0.9rem;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--paper);
  background: linear-gradient(180deg, rgba(5, 15, 32, 0), rgba(5, 15, 32, 0.88));
}

/* ---------- 13. 底纹工具 ---------- */
.texture-grid { position: relative; }

.texture-grid::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(36, 64, 107, 0.5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(36, 64, 107, 0.5) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.28;
}

.texture-grid > * {
  position: relative;
  z-index: 1;
}

/* ---------- 14. 动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 240ms var(--ease), transform 240ms var(--ease), border-color 240ms var(--ease);
}

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

/* ---------- 15. 响应式与无障碍收尾 ---------- */
@media (max-width: 700px) {
  body { background-attachment: scroll; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

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

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

  .site-header__progress { transition: none; }
}