/* ==========================================================================
   K1体育中国官网 · /assets/site.css
   共享外壳样式：reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  color-scheme: dark;
}

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

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

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

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;
  border-spacing: 0;
}

[hidden] {
  display: none !important;
}

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #06120F;
  --navy: #0B1B33;
  --board: #102924;
  --grid: #26433C;
  --lime: #C9FF4D;
  --amber: #FFA62B;
  --teal: #48E3CB;
  --text: #EAF5EF;
  --muted: #93A9A2;

  --fs-1: 14px;
  --fs-2: 16px;
  --fs-3: 20px;
  --fs-4: 28px;
  --fs-5: 44px;
  --fs-6: 64px;

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

  --gap: 12px;
  --pad-x: clamp(16px, 4vw, 56px);
  --radius: 2px;
  --header-h: 132px;
  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------- 3. 基础与中文排版 ---------- */
body {
  min-height: 100vh;
  background:
    radial-gradient(1100px 560px at 10% -12%, rgba(72, 227, 203, .10), transparent 62%),
    radial-gradient(880px 480px at 102% 2%, rgba(201, 255, 77, .07), transparent 58%),
    var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-2);
  font-weight: 400;
  line-height: 1.75;
  letter-spacing: 0;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(38, 67, 60, .30) 0,
    rgba(38, 67, 60, .30) 1px,
    transparent 1px,
    transparent 96px
  );
  opacity: .55;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--text);
}

p {
  line-height: 1.75;
}

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

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

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

/* ---------- 4. 工具类与容器 ---------- */
.container {
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

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

.stack > * + * {
  margin-top: 16px;
}

.section {
  position: relative;
  z-index: 1;
  padding-block: clamp(32px, 5vw, 64px);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  letter-spacing: -.01em;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--teal);
}

.lead {
  max-width: 70ch;
  font-size: var(--fs-2);
  color: var(--muted);
}

.coord-label {
  writing-mode: vertical-rl;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--muted);
}

.slant-divider {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, var(--grid) 18%, var(--grid) 82%, transparent);
}

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

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--text);
  background: rgba(16, 41, 36, .72);
  border: 1px solid var(--grid);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
  transition: background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease), transform .22s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
  border-color: var(--lime);
}

.btn--primary {
  background: var(--lime);
  border-color: var(--lime);
  color: var(--ink);
}

.btn--primary:hover {
  background: #DCFF7A;
}

.btn--accent {
  background: rgba(255, 166, 43, .14);
  border-color: rgba(255, 166, 43, .60);
  color: var(--amber);
}

.btn--ghost {
  background: transparent;
  color: var(--muted);
}

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

/* ---------- 6. 通用组件 ---------- */
.panel {
  position: relative;
  padding: clamp(18px, 2.4vw, 28px);
  background: linear-gradient(160deg, rgba(16, 41, 36, .95), rgba(11, 27, 51, .88));
  border: 1px solid var(--grid);
  clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
  transition: transform .24s var(--ease), border-color .24s var(--ease), box-shadow .24s var(--ease);
}

.panel:hover {
  transform: translateY(-2px);
  border-color: var(--lime);
  box-shadow: 0 14px 30px rgba(0, 0, 0, .38);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .10em;
  color: var(--teal);
  background: rgba(72, 227, 203, .12);
  border: 1px solid rgba(72, 227, 203, .28);
  border-radius: var(--radius);
}

.tag--lime {
  color: var(--lime);
  background: rgba(201, 255, 77, .12);
  border-color: rgba(201, 255, 77, .34);
}

.tag--amber {
  color: var(--amber);
  background: rgba(255, 166, 43, .12);
  border-color: rgba(255, 166, 43, .34);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--lime);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--grid);
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--grid);
  background: rgba(11, 27, 51, .42);
}

.data-table {
  width: 100%;
  font-size: 15px;
}

.data-table th,
.data-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid rgba(38, 67, 60, .75);
  white-space: nowrap;
}

.data-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--teal);
  background: rgba(16, 41, 36, .78);
}

.data-table td {
  font-family: var(--font-mono);
  color: var(--text);
}

.data-table tbody tr:hover {
  background: rgba(16, 41, 36, .55);
}

.index-rail {
  position: sticky;
  top: calc(var(--header-h) + 12px);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.index-link {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  color: var(--muted);
  border-left: 2px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.index-link:hover {
  color: var(--text);
  background: rgba(16, 41, 36, .55);
}

.index-link[data-active] {
  color: var(--lime);
  border-left-color: var(--lime);
  background: rgba(201, 255, 77, .07);
}

/* 图片容器基础规则（页面阶段填 img） */
.media-frame {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--navy), var(--ink));
  border: 1px solid var(--grid);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

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

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

.media-frame__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(72, 227, 203, .14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(72, 227, 203, .14) 1px, transparent 1px);
  background-size: 36px 36px;
}

.media-frame__caption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--lime);
  background: rgba(6, 18, 15, .80);
}

/* ---------- 7. Header ---------- */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 200;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  background: var(--lime);
  border-radius: var(--radius);
  transform: translateY(-180%);
  transition: transform .20s var(--ease);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: linear-gradient(180deg, rgba(6, 18, 15, .98), rgba(11, 27, 51, .94));
  border-bottom: 1px solid var(--grid);
  backdrop-filter: blur(8px);
  transition: box-shadow .24s var(--ease);
}

.site-header[data-compact] {
  box-shadow: 0 14px 34px rgba(0, 0, 0, .48);
}

.header-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .7;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(38, 67, 60, .35) 0,
    rgba(38, 67, 60, .35) 1px,
    transparent 1px,
    transparent 72px
  );
}

.header-shell {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.brand-layer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto auto;
  align-items: center;
  gap: clamp(12px, 2vw, 32px);
  padding-block: 14px;
  border-bottom: 1px solid rgba(38, 67, 60, .70);
  transition: padding .24s var(--ease);
}

.site-header[data-compact] .brand-layer {
  padding-block: 8px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  flex: none;
  width: 44px;
  height: 44px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--ink);
  background: var(--lime);
  clip-path: polygon(0 0, 100% 0, 100% 72%, 72% 100%, 0 100%);
  transition: width .24s var(--ease), height .24s var(--ease), font-size .24s var(--ease);
}

.site-header[data-compact] .brand-mark {
  width: 36px;
  height: 36px;
  font-size: 17px;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -.01em;
  color: var(--text);
  white-space: nowrap;
}

.brand-note {
  font-size: 12px;
  line-height: 1.4;
  letter-spacing: .18em;
  color: var(--muted);
  white-space: nowrap;
}

.header-pulse {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
  white-space: nowrap;
  background: rgba(16, 41, 36, .62);
  border: 1px solid var(--grid);
  border-radius: var(--radius);
}

.pulse-dot {
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--amber);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  animation: k1-pulse 2.4s ease-in-out infinite;
}

@keyframes k1-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .32; }
}

.header-quick {
  display: flex;
  align-items: center;
  gap: 8px;
}

.quick-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--text);
  background: rgba(11, 27, 51, .58);
  border: 1px solid var(--grid);
  white-space: nowrap;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.quick-link:hover,
.quick-link:focus-visible {
  color: var(--text);
  border-color: var(--teal);
  background: rgba(72, 227, 203, .12);
}

.quick-link--accent {
  color: var(--lime);
  border-color: rgba(201, 255, 77, .55);
  background: rgba(201, 255, 77, .08);
}

.quick-link--accent:hover,
.quick-link--accent:focus-visible {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--text);
  background: rgba(16, 41, 36, .72);
  border: 1px solid var(--grid);
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 18px;
  height: 2px;
  background: var(--lime);
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--lime);
  transition: transform .2s var(--ease);
}

.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after  { top: 6px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-layer {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  gap: 16px;
}

.site-nav {
  flex: 1 1 auto;
  min-width: 0;
}

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

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

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 13px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
  white-space: nowrap;
  transition: color .2s var(--ease), background .2s var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 0;
  height: 2px;
  background: var(--lime);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .20s var(--ease);
}

.nav-link:hover {
  color: var(--text);
  background: rgba(16, 41, 36, .62);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--lime);
  font-weight: 700;
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-tail {
  display: flex;
  flex: none;
  align-items: center;
  gap: 10px;
  padding-left: 14px;
  border-left: 1px dashed var(--grid);
}

.section-indicator {
  max-width: 18ch;
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .10em;
  color: var(--teal);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--muted);
  border: 1px solid var(--grid);
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.back-to-top:hover,
.back-to-top:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
  background: rgba(201, 255, 77, .08);
}

.scroll-track {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  z-index: 3;
  height: 2px;
  background: rgba(38, 67, 60, .55);
}

.scroll-bar {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--lime));
  transition: width .12s linear;
}

/* ---------- 8. Footer ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: clamp(48px, 8vw, 96px);
  background: linear-gradient(180deg, var(--navy) 0%, var(--ink) 78%);
  border-top: 1px solid var(--grid);
}

.footer-shell {
  width: 100%;
  max-width: 1440px;
  margin-inline: auto;
  padding: clamp(36px, 5vw, 64px) var(--pad-x) 28px;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: clamp(28px, 4vw, 64px);
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(38, 67, 60, .80);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

.brand--footer .brand-mark {
  width: 40px;
  height: 40px;
  font-size: 18px;
}

.footer-summary {
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.meta-chip {
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--teal);
  background: rgba(72, 227, 203, .07);
  border: 1px solid rgba(72, 227, 203, .30);
  border-radius: var(--radius);
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: clamp(20px, 3vw, 40px);
}

.footer-heading {
  margin-bottom: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--lime);
}

.footer-column ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-column a {
  display: inline-block;
  font-size: 14px;
  color: var(--muted);
  transition: color .2s var(--ease), transform .2s var(--ease);
}

.footer-column a:hover,
.footer-column a:focus-visible {
  color: var(--text);
  transform: translateX(3px);
}

.footer-contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 16px;
  padding: 28px 0;
  border-bottom: 1px solid rgba(38, 67, 60, .80);
}

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}

.contact-value {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  overflow-wrap: anywhere;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 24px;
  padding-top: 22px;
  font-size: 13px;
  color: var(--muted);
}

.footer-legal-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

.footer-legal-links a {
  color: var(--muted);
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.footer-legal-links a:hover,
.footer-legal-links a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

.footer-icp {
  font-family: var(--font-mono);
  letter-spacing: .06em;
}

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1080px) {
  .brand-layer {
    grid-template-columns: minmax(0, 1fr) auto auto;
  }

  .header-pulse {
    display: none;
  }
}

@media (max-width: 980px) {
  :root {
    --header-h: 76px;
  }

  .brand-layer {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
  }

  .header-quick {
    display: none;
  }

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

  .nav-layer {
    border-top: 0;
  }

  .site-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    z-index: 5;
    padding: 12px var(--pad-x) 20px;
    max-height: calc(100vh - 96px);
    overflow-y: auto;
    background: linear-gradient(180deg, rgba(11, 27, 51, .99), rgba(6, 18, 15, .99));
    border-top: 1px solid var(--grid);
    border-bottom: 1px solid var(--grid);
  }

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

  .nav-list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .nav-link {
    width: 100%;
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid rgba(38, 67, 60, .60);
  }

  .nav-link::after {
    left: 4px;
    right: auto;
    width: 36px;
  }

  .nav-tail {
    display: none;
  }

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

@media (max-width: 900px) {
  .grid-12 {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .grid-12 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .brand-name {
    font-size: 17px;
  }

  .brand-note {
    font-size: 11px;
    letter-spacing: .12em;
  }

  .nav-toggle-label {
    display: none;
  }

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

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

/* ---------- 10. 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }

  .panel:hover,
  .btn:hover {
    transform: none;
  }
}