/* ==========================================================================
   竞技联盟德州 — 共享站点样式 /assets/site.css
   基调：绒墨深绿牌桌 + 暗金蓝图刻度 + 少量行动橙红
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  --kj-felt-900: #0B211B;
  --kj-felt-800: #14382C;
  --kj-moss: #2F6B52;
  --kj-stone: #3C423F;
  --kj-gold: #C7A22C;
  --kj-gold-light: #E9CE72;
  --kj-clay: #B2663C;
  --kj-action: #FF5A2B;
  --kj-cream: #F3EEE4;
  --kj-ink: #101614;

  --kj-text: #E4EDE7;
  --kj-text-2: #A6BBB0;
  --kj-text-3: #7C9088;

  --kj-line: rgba(199, 162, 44, .18);
  --kj-line-strong: rgba(199, 162, 44, .45);
  --kj-hair: rgba(243, 238, 228, .08);
  --kj-grid: rgba(243, 238, 228, .045);

  --kj-glass: rgba(16, 42, 34, .86);
  --kj-glass-soft: rgba(243, 238, 228, .04);

  --kj-font-sans: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --kj-font-display: "Songti SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  --kj-font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;

  --kj-ease: cubic-bezier(.22, .61, .36, 1);
  --kj-radius: 26px;
  --kj-radius-lg: 34px;
  --kj-radius-pill: 999px;
  --kj-gutter: clamp(16px, 4vw, 40px);
  --kj-shadow: 0 30px 60px -40px rgba(0, 0, 0, .95);
}

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

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

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

ul, ol { list-style: none; }

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

input, textarea, select { font: inherit; }

h1, h2, h3, h4 { font-weight: 800; line-height: 1.16; }

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

/* ---------- 3. 页面基座 ---------- */
body {
  min-height: 100vh;
  background-color: var(--kj-felt-900);
  background-image:
    radial-gradient(1100px 620px at 78% -10%, rgba(47, 107, 82, .30), transparent 62%),
    radial-gradient(760px 520px at 2% 6%, rgba(178, 102, 60, .12), transparent 68%),
    linear-gradient(var(--kj-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--kj-grid) 1px, transparent 1px);
  background-size: auto, auto, 72px 72px, 72px 72px;
  background-attachment: fixed, fixed, fixed, fixed;
  color: var(--kj-text);
  font-family: var(--kj-font-sans);
  font-size: 17px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

#main-content { display: block; }

[id] { scroll-margin-top: 120px; }

:focus-visible {
  outline: 2px solid var(--kj-gold-light);
  outline-offset: 3px;
  border-radius: 8px;
}

/* ---------- 4. 通用工具 ---------- */
.kj-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.kj-mono {
  font-family: var(--kj-font-mono);
  letter-spacing: .08em;
}

.kj-skip {
  position: fixed;
  top: -72px;
  left: 16px;
  z-index: 200;
  padding: 11px 20px;
  border-radius: 0 0 16px 16px;
  background: var(--kj-gold-light);
  color: var(--kj-ink);
  font-weight: 700;
  font-size: 15px;
  transition: top .18s var(--kj-ease);
}

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

.kj-rule {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, var(--kj-line-strong), rgba(199, 162, 44, 0));
}

/* ---------- 5. 头部：三枚浮岛 ---------- */
.kj-header {
  position: sticky;
  top: 0;
  z-index: 80;
  padding: clamp(10px, 1.4vw, 18px) var(--kj-gutter);
}

.kj-header::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -40px;
  bottom: -26px;
  pointer-events: none;
  z-index: 0;
  background: linear-gradient(180deg,
      rgba(11, 33, 27, .98) 0%,
      rgba(11, 33, 27, .92) 58%,
      rgba(11, 33, 27, .48) 82%,
      rgba(11, 33, 27, 0) 100%);
}

.kj-header__inner {
  position: relative;
  z-index: 1;
  width: min(1280px, 100%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: clamp(10px, 1.6vw, 22px);
}

.kj-brand,
.kj-nav,
.kj-header__actions {
  background: var(--kj-glass);
  border: 1px solid var(--kj-line);
  border-radius: var(--kj-radius-pill);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color .24s var(--kj-ease),
              background-color .24s var(--kj-ease),
              padding .24s var(--kj-ease);
}

/* 品牌徽记 */
.kj-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 7px 20px 7px 8px;
  flex: 0 0 auto;
}

.kj-brand:hover { border-color: rgba(233, 206, 114, .55); }

.kj-brand__mark {
  position: relative;
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%,
      #0B211B 0 30%,
      #C7A22C 30% 35%,
      #14382C 35% 52%,
      rgba(199, 162, 44, .85) 52% 56%,
      #14382C 56% 74%,
      rgba(199, 162, 44, .5) 74% 77%,
      #0B211B 77% 100%);
  box-shadow: 0 0 0 1px rgba(233, 206, 114, .35), 0 6px 18px -8px rgba(0, 0, 0, .9);
  transition: width .24s var(--kj-ease), height .24s var(--kj-ease);
}

.kj-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.kj-brand__name {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: .04em;
  color: var(--kj-cream);
}

.kj-brand__sub {
  font-family: var(--kj-font-mono);
  font-size: 10px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--kj-gold);
}

/* 栏目胶囊 */
.kj-nav {
  margin-inline: auto;
  padding: 5px;
}

.kj-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.kj-nav__item { display: flex; }

.kj-nav__link {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  border-radius: var(--kj-radius-pill);
  font-size: 14px;
  color: var(--kj-text-2);
  white-space: nowrap;
  transition: color .2s var(--kj-ease), background-color .2s var(--kj-ease);
}

.kj-nav__link:hover {
  color: var(--kj-gold-light);
  background: rgba(199, 162, 44, .1);
}

.kj-nav__link[aria-current="page"] {
  color: var(--kj-ink);
  font-weight: 700;
  background: linear-gradient(180deg, var(--kj-gold-light), var(--kj-gold));
}

/* 行动胶囊 */
.kj-header__actions {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px;
  flex: 0 0 auto;
}

.kj-header__cta { padding: 10px 20px; font-size: 14px; }

.kj-navtoggle {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 10px 16px;
  border-radius: var(--kj-radius-pill);
  border: 1px solid rgba(199, 162, 44, .3);
  color: var(--kj-gold-light);
}

.kj-navtoggle:hover { border-color: var(--kj-gold-light); background: rgba(199, 162, 44, .1); }

.kj-navtoggle__bars {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  width: 16px;
}

.kj-navtoggle__bars i {
  display: block;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .2s var(--kj-ease), opacity .2s var(--kj-ease);
}

.kj-navtoggle__label {
  font-family: var(--kj-font-mono);
  font-size: 12px;
  letter-spacing: .14em;
}

.kj-header[data-open] .kj-navtoggle__bars i:nth-child(1) { transform: translateY(4.5px) rotate(45deg); }
.kj-header[data-open] .kj-navtoggle__bars i:nth-child(2) { opacity: 0; }
.kj-header[data-open] .kj-navtoggle__bars i:nth-child(3) { transform: translateY(-4.5px) rotate(-45deg); }

/* 滚动刻度 */
.kj-header__progress {
  position: absolute;
  left: 20px;
  right: 20px;
  bottom: -1px;
  height: 2px;
  border-radius: 2px;
  background: rgba(199, 162, 44, .14);
  overflow: hidden;
  pointer-events: none;
}

.kj-header__progress span {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--kj-gold), var(--kj-action));
}

/* 滚动收缩态 */
.kj-header[data-scrolled] .kj-brand { padding: 5px 16px 5px 6px; }
.kj-header[data-scrolled] .kj-brand__mark { width: 30px; height: 30px; }
.kj-header[data-scrolled] .kj-nav__link { padding: 7px 12px; font-size: 13.5px; }
.kj-header[data-scrolled] .kj-header__cta { padding: 8px 16px; font-size: 13px; }

/* ---------- 6. 页脚 ---------- */
.kj-footer {
  position: relative;
  padding: clamp(52px, 7vw, 92px) var(--kj-gutter) 26px;
  border-top: 1px solid var(--kj-line);
  background:
    linear-gradient(180deg, rgba(8, 25, 20, 0) 0%, rgba(8, 25, 20, .92) 20%, #081914 62%);
  color: var(--kj-text-2);
}

.kj-footer__grid {
  width: min(1280px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr .9fr .9fr 1.35fr;
  gap: clamp(28px, 4vw, 56px);
}

.kj-footer__col {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.kj-footer__col--brand { gap: 16px; }

.kj-footer .kj-brand {
  background: none;
  border-color: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  padding: 0;
  border-radius: 0;
}

.kj-footer .kj-brand:hover { border-color: transparent; }

.kj-footer__tagline {
  font-size: 17px;
  font-weight: 700;
  color: var(--kj-cream);
  line-height: 1.6;
}

.kj-footer__note {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--kj-text-3);
  max-width: 34ch;
}

.kj-footer__title {
  font-family: var(--kj-font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--kj-gold);
}

.kj-footer__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.kj-footer__list--plain { gap: 12px; }

.kj-footer__list--plain li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
}

.kj-footer__link {
  font-size: 14.5px;
  color: var(--kj-text-2);
  transition: color .2s var(--kj-ease);
}

.kj-footer__link:hover { color: var(--kj-gold-light); }

.kj-footer__label {
  font-family: var(--kj-font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--kj-text-3);
  flex: 0 0 66px;
}

.kj-footer__value {
  font-size: 14.5px;
  color: var(--kj-text-2);
  word-break: break-word;
}

.kj-copybtn {
  align-self: flex-start;
  padding: 9px 18px;
  border-radius: var(--kj-radius-pill);
  border: 1px dashed rgba(199, 162, 44, .42);
  color: var(--kj-gold-light);
  font-family: var(--kj-font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  transition: background-color .22s var(--kj-ease), border-color .22s var(--kj-ease);
}

.kj-copybtn:hover {
  background: rgba(199, 162, 44, .12);
  border-color: var(--kj-gold-light);
}

/* 铜鼓同心纹收边 */
.kj-footer__drum {
  width: min(1280px, 100%);
  height: 24px;
  margin: clamp(36px, 5vw, 58px) auto 0;
  background-image: radial-gradient(circle at 50% 50%,
      transparent 0 4px,
      rgba(178, 102, 60, .7) 4px 5px,
      transparent 5px 10px,
      rgba(199, 162, 44, .38) 10px 11px,
      transparent 11px);
  background-size: 26px 24px;
  background-repeat: repeat-x;
  background-position: center;
  opacity: .85;
}

.kj-footer__base {
  width: min(1280px, 100%);
  margin: 0 auto;
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px 24px;
  border-top: 1px solid var(--kj-hair);
}

.kj-footer__copy {
  font-family: var(--kj-font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--kj-text-3);
}

.kj-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 7. 按钮体系 ---------- */
.kj-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--kj-radius-pill);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--kj-text);
  transition: background-color .22s var(--kj-ease),
              color .22s var(--kj-ease),
              border-color .22s var(--kj-ease),
              transform .22s var(--kj-ease);
}

.kj-btn--action {
  background: var(--kj-action);
  color: #fff;
  box-shadow: 0 14px 30px -18px rgba(255, 90, 43, .95);
}

.kj-btn--action:hover {
  background: #ff7448;
  transform: translateY(-1px);
}

.kj-btn--gold {
  background: linear-gradient(180deg, var(--kj-gold-light), var(--kj-gold));
  color: var(--kj-ink);
}

.kj-btn--gold:hover { background: var(--kj-gold-light); }

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

.kj-btn--ghost:hover {
  border-color: var(--kj-gold-light);
  color: var(--kj-gold-light);
}

.kj-btn--quiet {
  background: var(--kj-glass-soft);
  border-color: var(--kj-hair);
  color: var(--kj-text-2);
}

.kj-btn--quiet:hover {
  color: var(--kj-cream);
  border-color: var(--kj-line);
}

/* ---------- 8. 胶囊标签与指标 ---------- */
.kj-chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 16px;
  border-radius: var(--kj-radius-pill);
  border: 1px solid rgba(199, 162, 44, .24);
  background: var(--kj-glass-soft);
  color: var(--kj-text-2);
  font-size: 13px;
  transition: color .22s var(--kj-ease),
              border-color .22s var(--kj-ease),
              background-color .22s var(--kj-ease);
}

.kj-chip:hover {
  color: var(--kj-gold-light);
  border-color: rgba(233, 206, 114, .6);
  background: rgba(199, 162, 44, .1);
}

.kj-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--kj-radius-pill);
  border: 1px solid rgba(199, 162, 44, .32);
  background: rgba(199, 162, 44, .08);
  color: var(--kj-gold-light);
  font-family: var(--kj-font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

.kj-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.kj-stat__value {
  font-family: var(--kj-font-mono);
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--kj-gold-light);
}

.kj-stat__label {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--kj-text-3);
}

/* ---------- 9. 内容容器与蓝图网格 ---------- */
.kj-container {
  width: min(1280px, 100%);
  margin-inline: auto;
  padding-inline: var(--kj-gutter);
}

.kj-section { padding-block: clamp(52px, 8vw, 108px); }

.kj-section__head {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: clamp(28px, 4vw, 48px);
  max-width: 76ch;
}

.kj-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 2vw, 28px);
}

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

/* ---------- 10. 文案层级 ---------- */
.kj-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--kj-font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--kj-gold);
}

.kj-eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--kj-gold));
}

.kj-title {
  font-family: var(--kj-font-sans);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -.015em;
  color: var(--kj-cream);
}

.kj-title em {
  font-family: var(--kj-font-display);
  font-style: normal;
  font-weight: 700;
  color: var(--kj-gold-light);
}

.kj-title--display { font-size: clamp(46px, 7.4vw, 96px); }
.kj-title--1 { font-size: clamp(30px, 4vw, 44px); }
.kj-title--2 {
  font-size: clamp(21px, 2.3vw, 27px);
  font-weight: 700;
  line-height: 1.3;
}

.kj-lede {
  font-size: clamp(16px, 1.25vw, 18px);
  line-height: 1.9;
  color: var(--kj-text-2);
  max-width: 64ch;
}

/* ---------- 11. 卡片与面板 ---------- */
.kj-card,
.kj-panel {
  background: linear-gradient(165deg, rgba(20, 56, 44, .86), rgba(11, 33, 27, .92));
  border: 1px solid rgba(199, 162, 44, .16);
  border-radius: var(--kj-radius);
  padding: clamp(20px, 2.5vw, 32px);
  min-width: 0;
}

.kj-card {
  transition: border-color .26s var(--kj-ease),
              transform .26s var(--kj-ease),
              box-shadow .26s var(--kj-ease);
}

.kj-card:hover {
  border-color: rgba(199, 162, 44, .5);
  transform: translateY(-3px);
  box-shadow: var(--kj-shadow);
}

/* ---------- 12. 图片容器（供页面阶段放图） ---------- */
.kj-media {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--kj-radius);
  border: 1px solid rgba(199, 162, 44, .2);
  background:
    radial-gradient(120% 90% at 72% 12%, rgba(47, 107, 82, .45), transparent 62%),
    linear-gradient(155deg, #14382C, #0B211B 62%, #08170F);
  aspect-ratio: 16 / 10;
}

.kj-media > img,
.kj-media > picture,
.kj-media > svg,
.kj-media > video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.kj-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(243, 238, 228, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(243, 238, 228, .055) 1px, transparent 1px);
  background-size: 34px 34px;
}

.kj-media--plain::after { display: none; }
.kj-media--wide { aspect-ratio: 21 / 9; }
.kj-media--tall { aspect-ratio: 3 / 4; }
.kj-media--square { aspect-ratio: 1 / 1; }

/* ---------- 13. 面包屑 ---------- */
.kj-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--kj-font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--kj-text-3);
}

.kj-crumb a { color: var(--kj-text-2); transition: color .2s var(--kj-ease); }
.kj-crumb a:hover { color: var(--kj-gold-light); }
.kj-crumb__sep { color: var(--kj-stone); }
.kj-crumb [aria-current="page"] { color: var(--kj-gold-light); }

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1180px) {
  .kj-brand__sub { display: none; }
}

@media (max-width: 1040px) {
  .kj-nav__link { padding: 7px 10px; font-size: 13px; }
  .kj-header__cta { padding: 9px 14px; font-size: 13px; }
}

@media (max-width: 960px) {
  .kj-nav {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    margin: 0;
    padding: 10px;
    border-radius: var(--kj-radius-lg);
    background: rgba(11, 33, 27, .98);
    border-color: var(--kj-line);
    box-shadow: var(--kj-shadow);
    max-height: min(72vh, 520px);
    overflow-y: auto;
    z-index: 5;
  }

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

  .kj-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .kj-nav__link {
    width: 100%;
    justify-content: flex-start;
    padding: 13px 18px;
    border-radius: 18px;
    font-size: 15px;
  }

  .kj-nav__link[aria-current="page"] { border-radius: 18px; }

  .kj-navtoggle { display: inline-flex; }

  .kj-header__inner { gap: 10px; }
  .kj-header__actions { padding: 4px; }
}

@media (max-width: 900px) {
  .kj-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .kj-span-3,
  .kj-span-4 { grid-column: span 3; }
  .kj-span-5,
  .kj-span-6,
  .kj-span-7,
  .kj-span-8,
  .kj-span-12 { grid-column: span 6; }

  .kj-footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  body { font-size: 16px; }
  .kj-footer__grid { gap: 30px 24px; }
}

@media (max-width: 600px) {
  .kj-grid { grid-template-columns: 1fr; }
  .kj-span-3,
  .kj-span-4,
  .kj-span-5,
  .kj-span-6,
  .kj-span-7,
  .kj-span-8,
  .kj-span-12 { grid-column: 1 / -1; }

  .kj-footer__grid { grid-template-columns: 1fr; }
  .kj-footer__base { justify-content: flex-start; }
}

@media (max-width: 560px) {
  .kj-header__cta { display: none; }
  .kj-navtoggle__label { display: none; }
  .kj-navtoggle { padding: 10px 14px; }
  .kj-footer__label { flex: 0 0 100%; }
}

@media (max-width: 700px) {
  body { background-attachment: scroll; }
}

/* ---------- 15. 无障碍与动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}