/* ============================================================
   奇异果赛场 · flash-qiyiguo.com.cn
   /assets/site.css — 共享外壳：reset / 变量 / 中文排版 / 页头 / 页脚 / 通用组件
   ============================================================ */

/* ---------- 1. reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, p, ul, ol, li, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
table { border-collapse: collapse; }
:focus-visible { outline: 2px solid #29E0C0; outline-offset: 3px; border-radius: 3px; }

/* ---------- 2. 设计变量 ---------- */
:root {
  --paper:      #F4EFE4;
  --paper-2:    #FFFDF7;
  --ink:        #131619;
  --ink-2:      #1E2429;
  --kiwi:       #8FC13B;
  --brown:      #6E4A2E;
  --cobalt:     #1B4F8F;
  --fog:        #C9CDC7;
  --cyan:       #29E0C0;
  --cyan-ink:   #0F6F61;
  --flag-y:     #E3A62B;
  --flag-r:     #C24A32;

  --rail-w:     96px;
  --rail-open:  248px;
  --bar-h:      0px;

  --gutter:     clamp(20px, 5vw, 64px);
  --page-max:   1180px;

  --r-s: 10px;
  --r-m: 18px;
  --r-organic: 34px 34px 34px 8px;
  --r-pill: 999px;

  --ease: cubic-bezier(.2, .7, .25, 1);
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

@media (max-width: 1023px) {
  :root { --rail-w: 0px; --bar-h: 58px; }
}

/* ---------- 3. 基础与中文排版 ---------- */
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  padding-left: var(--rail-w);
  padding-top: var(--bar-h);
  min-height: 100vh;
  overflow-x: hidden;
}
@media (min-width: 1024px) { body { font-size: 17px; } }

h1, .h1 { font-size: clamp(34px, 6.2vw, 64px); font-weight: 900; line-height: 1.06; letter-spacing: -.02em; }
h2, .h2 { font-size: clamp(26px, 4vw, 40px); font-weight: 900; line-height: 1.16; letter-spacing: -.015em; }
h3, .h3 { font-size: clamp(19px, 2.4vw, 24px); font-weight: 700; line-height: 1.38; }
.lede { font-size: clamp(17px, 2vw, 20px); line-height: 1.8; font-weight: 400; }
.prose { max-width: min(37em, 100%); line-height: 1.85; }
.prose p + p { margin-top: 1.1em; }
.muted { color: rgba(19, 22, 25, .62); }
.mono { font-family: var(--font-mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase; }
.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; letter-spacing: -.01em; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .22em;
  text-transform: uppercase; color: var(--brown);
}
.eyebrow::before { content: ""; width: 26px; height: 3px; background: var(--kiwi); }

/* ---------- 4. 无障碍辅助 ---------- */
.skip-link {
  position: fixed; left: 50%; top: 8px; z-index: 200;
  transform: translate(-50%, -180%);
  background: var(--ink); color: var(--paper);
  padding: 10px 20px; border-radius: var(--r-pill);
  font-size: 14px; font-weight: 700;
  transition: transform .2s var(--ease);
}
.skip-link:focus { transform: translate(-50%, 0); }
html.is-locked, html.is-locked body { overflow: hidden; }

/* ---------- 5. 布局骨架 ---------- */
.wrap {
  width: 100%; max-width: var(--page-max);
  margin-inline: auto; padding-inline: var(--gutter);
}
.wrap--narrow { max-width: 820px; }
.section { padding-block: clamp(52px, 8vw, 116px); }
.section--tight { padding-block: clamp(28px, 4vw, 56px); }
.section--ink { background: var(--ink-2); color: var(--paper); }
.section--ink .eyebrow { color: var(--cyan); }
.section--ink .muted { color: rgba(244, 239, 228, .66); }
.section--kiwi { background: var(--kiwi); color: var(--ink); }

.grid { display: grid; gap: clamp(18px, 3vw, 32px); grid-template-columns: 1fr; }
@media (min-width: 700px) {
  .grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid--offset > *:nth-child(even) { margin-top: 46px; }
}

.rule { height: 1px; border: 0; background: rgba(19, 22, 25, .16); margin-block: clamp(28px, 4vw, 48px); }
.rule--diag { height: 3px; background: var(--kiwi); transform: skewY(-1.2deg); }
.section--ink .rule { background: rgba(244, 239, 228, .2); }

/* ---------- 6. 横向主题带 ---------- */
.band {
  background: var(--ink-2); color: var(--paper);
  padding-block: clamp(22px, 3.5vw, 42px);
  overflow: hidden;
}
.band--kiwi { background: var(--kiwi); color: var(--ink); }
.band__track {
  display: flex; gap: clamp(14px, 2vw, 24px);
  overflow-x: auto; scroll-snap-type: x proximity;
  padding-inline: var(--gutter); scrollbar-width: none;
}
.band__track::-webkit-scrollbar { display: none; }
.band__item { flex: 0 0 min(78vw, 320px); scroll-snap-align: start; }

/* ---------- 7. 卡片 / 徽标 / 数据 ---------- */
.card {
  background: var(--paper-2);
  border: 1px solid rgba(19, 22, 25, .14);
  border-radius: var(--r-m);
  padding: clamp(20px, 3vw, 28px);
}
.card--ink { background: var(--ink-2); color: var(--paper); border-color: transparent; }
.card--kiwi { background: var(--kiwi); color: var(--ink); border-color: transparent; }
.card--edge { border-radius: var(--r-organic); }
.card__kicker {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--cobalt);
}
.card--ink .card__kicker { color: var(--cyan); }
.card__title { margin-top: 10px; font-size: 20px; font-weight: 900; line-height: 1.32; }
.card__text { margin-top: 10px; font-size: 15px; line-height: 1.8; color: rgba(19, 22, 25, .72); }
.card--ink .card__text { color: rgba(244, 239, 228, .76); }
.card__meta { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: var(--r-pill);
  border: 1px solid rgba(19, 22, 25, .2);
  font-size: 12px; letter-spacing: .08em;
}
.chip--cyan { border-color: rgba(41, 224, 192, .55); background: rgba(41, 224, 192, .14); color: var(--cyan-ink); }
.chip--kiwi { background: var(--kiwi); border-color: transparent; color: var(--ink); font-weight: 700; }
.chip--flag { background: var(--flag-y); border-color: transparent; color: var(--ink); font-weight: 700; }

.stat { display: flex; flex-direction: column; gap: 4px; }
.stat__num {
  font-family: var(--font-mono); font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 5vw, 52px); font-weight: 700; line-height: 1; letter-spacing: -.02em;
}
.stat__unit { font-family: var(--font-mono); font-size: 12px; letter-spacing: .12em; color: var(--cobalt); }
.stat__label { font-size: 12.5px; letter-spacing: .08em; color: rgba(19, 22, 25, .6); }
.section--ink .stat__unit { color: var(--cyan); }
.section--ink .stat__label { color: rgba(244, 239, 228, .64); }

.ledger { border-top: 1px solid rgba(19, 22, 25, .18); }
.ledger__row {
  display: grid; grid-template-columns: 1fr; gap: 4px 18px;
  padding: 16px 0; border-bottom: 1px solid rgba(19, 22, 25, .1);
}
@media (min-width: 700px) {
  .ledger__row { grid-template-columns: 118px minmax(0, 1fr) auto; align-items: baseline; }
}
.ledger__key {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--brown);
}
.ledger__val { font-size: 15.5px; }
.ledger__note { font-family: var(--font-mono); font-size: 12px; color: var(--cobalt); font-variant-numeric: tabular-nums; }

/* ---------- 8. 可展开内容组 ---------- */
.fold { border-top: 1px solid rgba(19, 22, 25, .18); }
.fold__sum {
  display: flex; align-items: center; gap: 14px;
  list-style: none; cursor: pointer;
  padding: 18px 0; font-size: 17px; font-weight: 700; line-height: 1.5;
}
.fold__sum::-webkit-details-marker { display: none; }
.fold__sum::after {
  content: "+"; margin-left: auto;
  font-family: var(--font-mono); font-size: 20px; color: var(--kiwi);
  transition: transform .25s var(--ease);
}
.fold[open] .fold__sum::after { transform: rotate(45deg); }
.fold__body { padding: 0 0 22px; line-height: 1.85; color: rgba(19, 22, 25, .78); }

/* ---------- 9. 按钮 / 面包屑 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 24px; border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: 15px; font-weight: 700; letter-spacing: .04em;
  transition: transform .18s var(--ease), background-color .2s, color .2s, border-color .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn--kiwi { background: var(--kiwi); color: var(--ink); }
.btn--ink { background: var(--ink); color: var(--paper); }
.btn--cyan { background: var(--cyan); color: #062F28; }
.btn--ghost { border-color: rgba(19, 22, 25, .3); color: var(--ink); }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

.crumbs {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em;
  color: rgba(19, 22, 25, .6);
}
.crumbs li { display: flex; align-items: center; gap: 8px; }
.crumbs li + li::before { content: "/"; color: var(--brown); }
.crumbs a:hover { color: var(--cobalt); }

/* ---------- 10. 图片容器基础（供页面阶段放入图片） ---------- */
.media {
  position: relative; overflow: hidden;
  border-radius: var(--r-m);
  border: 1px solid rgba(19, 22, 25, .12);
  background:
    repeating-linear-gradient(-14deg, rgba(110, 74, 46, .13) 0 2px, rgba(110, 74, 46, 0) 2px 15px),
    var(--fog);
}
.media__img { width: 100%; height: 100%; object-fit: cover; }
.media--wide { aspect-ratio: 16 / 9; }
.media--tall { aspect-ratio: 4 / 5; }
.media--square { aspect-ratio: 1 / 1; }
.media--band { aspect-ratio: 21 / 9; }
.media--cut { clip-path: polygon(0 0, 100% 0, 100% 82%, 82% 100%, 0 100%); border-radius: 0; }
.media__tag {
  position: absolute; left: 12px; bottom: 12px;
  padding: 6px 10px; border-radius: var(--r-pill);
  background: rgba(19, 22, 25, .84); color: var(--cyan);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .16em;
}
.media__cap { margin-top: 10px; font-size: 12.5px; line-height: 1.6; color: rgba(19, 22, 25, .62); }

/* ---------- 11. 页头 ---------- */
.site-head { position: relative; z-index: 90; }

/* 顶部滚动进度 */
.progress {
  position: fixed; top: var(--bar-h); left: var(--rail-w); right: 0;
  height: 3px; z-index: 99; pointer-events: none;
  background: rgba(19, 22, 25, .1);
}
.progress__bar {
  display: block; width: 100%; height: 100%;
  transform: scaleX(0); transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--kiwi), var(--cyan));
}

/* 移动端细条 */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 96;
  height: 58px; padding-inline: 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: var(--paper);
  border-bottom: 1px solid rgba(19, 22, 25, .16);
}
@media (min-width: 1024px) { .topbar { display: none; } }

/* 品牌标记 */
.brand { display: flex; align-items: center; gap: 12px; }
.brand__mark {
  position: relative; flex: 0 0 auto;
  width: 30px; height: 30px; border-radius: 50%;
  background: conic-gradient(from 20deg, var(--kiwi), #B6DD62, var(--kiwi) 70%);
  box-shadow: inset 0 0 0 1px rgba(19, 22, 25, .28);
}
.brand__seed {
  position: absolute; width: 3px; height: 3px; border-radius: 50%;
  background: var(--ink);
}
.brand__seed:nth-child(1) { top: 8px; left: 13px; }
.brand__seed:nth-child(2) { top: 14px; left: 9px; }
.brand__seed:nth-child(3) { top: 17px; left: 16px; }
.brand__name { font-size: 17px; font-weight: 900; letter-spacing: -.01em; }
.brand--bar .brand__name { font-size: 16px; }

/* 汉堡按钮 */
.nav-toggle {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 8px 14px; border-radius: var(--r-pill);
  background: var(--ink); color: var(--paper);
  font-size: 12px; font-weight: 700; letter-spacing: .16em;
}
.nav-toggle__bars { display: grid; gap: 4px; width: 18px; }
.nav-toggle__bars span {
  display: block; height: 2px; border-radius: 2px; background: var(--cyan);
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
@media (min-width: 1024px) { .nav-toggle { display: none; } }

/* 遮罩 */
.scrim {
  position: fixed; inset: 0; z-index: 94;
  background: rgba(19, 22, 25, .58);
  opacity: 0; pointer-events: none;
  transition: opacity .3s var(--ease);
}
.scrim.is-on { opacity: 1; pointer-events: auto; }
@media (min-width: 1024px) { .scrim { display: none; } }

/* 侧边轨道导航 */
.rail {
  position: fixed; top: 0; left: 0; bottom: 0; z-index: 95;
  width: var(--rail-w);
  display: flex; flex-direction: column; align-items: center; gap: 18px;
  padding: 18px 10px 22px;
  background: var(--ink); color: var(--paper);
  overflow-y: auto; overflow-x: hidden;
  scrollbar-width: none;
  transition: width .32s var(--ease), transform .32s var(--ease);
}
.rail::-webkit-scrollbar { display: none; }
@media (min-width: 1024px) {
  .rail:hover, .rail:focus-within { width: var(--rail-open); }
}

.rail__top {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  text-align: center; padding-block: 2px;
}
.rail .brand { flex-direction: column; gap: 10px; }
.rail .brand__name {
  writing-mode: vertical-rl;
  font-size: 13px; font-weight: 900; letter-spacing: .2em;
}
.rail__domain {
  display: none;
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .1em;
  color: rgba(244, 239, 228, .5); text-align: center; word-break: break-all;
}
@media (min-width: 1024px) {
  .rail:hover .rail__domain, .rail:focus-within .rail__domain { display: block; }
}

.rail__nav { display: flex; flex-direction: column; gap: 2px; width: 100%; }
.rail__link {
  position: relative;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 10px 4px; border-radius: var(--r-s);
  color: rgba(244, 239, 228, .8);
  transition: background-color .2s var(--ease), color .2s var(--ease);
}
.rail__link:hover { background: rgba(143, 193, 59, .16); color: var(--paper); }
.rail__link[aria-current="page"] { background: var(--kiwi); color: var(--ink); }
.rail__idx {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: .12em;
  color: rgba(244, 239, 228, .48);
}
.rail__link[aria-current="page"] .rail__idx { color: rgba(19, 22, 25, .62); }
.rail__label {
  writing-mode: vertical-rl;
  font-size: 13px; font-weight: 700; letter-spacing: .16em; line-height: 1;
}

.rail__foot { display: flex; flex-direction: column; gap: 8px; width: 100%; margin-top: auto; }
.rail__tagline {
  display: none;
  font-size: 10.5px; line-height: 1.7; letter-spacing: .1em;
  color: rgba(244, 239, 228, .48); text-align: center; margin-bottom: 4px;
}
.rail__cta {
  display: block; width: 100%; text-align: center;
  padding: 11px 10px; border-radius: var(--r-pill);
  background: var(--kiwi); color: var(--ink);
  font-size: 13.5px; font-weight: 700; letter-spacing: .04em;
  transition: background-color .2s var(--ease), transform .18s var(--ease), color .2s, border-color .2s;
}
.rail__cta:hover { transform: translateY(-2px); }
.rail__cta--ghost { background: transparent; color: var(--paper); border: 1px solid rgba(244, 239, 228, .34); }
.rail__cta--ghost:hover { border-color: var(--cyan); color: var(--cyan); }
.rail__close {
  display: flex; align-items: center; justify-content: center;
  width: 100%; padding: 13px; border-radius: var(--r-pill);
  border: 1px dashed rgba(244, 239, 228, .38);
  color: rgba(244, 239, 228, .82);
  font-size: 13px; letter-spacing: .1em;
  transition: border-color .2s, color .2s;
}
.rail__close:hover { border-color: var(--cyan); color: var(--cyan); }
@media (min-width: 1024px) { .rail__close { display: none; } }

/* 桌面端收起状态：隐藏次级信息 */
@media (min-width: 1024px) {
  .rail__cta { display: none; }
  .rail:hover .rail__cta, .rail:focus-within .rail__cta { display: block; }
  .rail__tagline { display: none; }
  .rail:hover .rail__tagline, .rail:focus-within .rail__tagline { display: block; }
}

/* 移动端：轨道变抽屉 */
@media (max-width: 1023px) {
  .rail {
    width: min(84vw, 340px);
    padding: 22px 18px 26px;
    align-items: stretch;
    transform: translateX(-102%);
    box-shadow: 26px 0 52px rgba(19, 22, 25, .3);
  }
  .rail[data-open="true"] { transform: translateX(0); }
  .rail__top { flex-direction: row; align-items: center; justify-content: flex-start; gap: 12px; text-align: left; }
  .rail .brand { flex-direction: row; gap: 10px; }
  .rail .brand__name { writing-mode: horizontal-tb; font-size: 16px; letter-spacing: 0; }
  .rail__domain { display: block; font-size: 10.5px; text-align: left; }
  .rail__nav { margin-top: 6px; gap: 4px; }
  .rail__link {
    flex-direction: row; align-items: center; justify-content: flex-start;
    gap: 16px; padding: 14px 12px;
  }
  .rail__label { writing-mode: horizontal-tb; font-size: 17px; letter-spacing: .06em; }
  .rail__idx { font-size: 12px; }
  .rail__foot { margin-top: 18px; }
  .rail__tagline { display: block; text-align: left; }
}

/* ---------- 12. 页脚 ---------- */
.site-foot {
  position: relative; overflow: hidden;
  margin-top: clamp(56px, 9vw, 120px);
  padding: clamp(48px, 7vw, 88px) 0 26px;
  background: var(--ink); color: var(--paper);
}
.site-foot::after {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 5px;
  background: linear-gradient(90deg,
    var(--kiwi) 0 34%, var(--cyan) 34% 52%, var(--flag-y) 52% 74%, var(--flag-r) 74% 100%);
}
.site-foot::before {
  content: ""; position: absolute; top: -48px; right: -90px;
  width: min(52vw, 560px); height: 230px;
  background: repeating-linear-gradient(104deg,
    rgba(143, 193, 59, .2) 0 5px, rgba(143, 193, 59, 0) 5px 22px);
  transform: rotate(-6deg);
  pointer-events: none;
}
.foot-inner {
  position: relative; z-index: 1;
  width: 100%; max-width: var(--page-max);
  margin-inline: auto; padding-inline: var(--gutter);
}

.foot-lead { display: flex; flex-direction: column; gap: 14px; }
.foot-word {
  font-size: clamp(42px, 9vw, 96px);
  font-weight: 900; line-height: .94; letter-spacing: -.03em;
  color: var(--paper);
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .foot-word {
    background: linear-gradient(100deg, var(--paper) 0 56%, var(--kiwi) 56% 100%);
    -webkit-background-clip: text; background-clip: text; color: transparent;
  }
}
.foot-meta { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.foot-meta__item {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .16em;
  text-transform: uppercase; color: rgba(244, 239, 228, .58);
}

.foot-main {
  display: grid; gap: clamp(28px, 4vw, 56px);
  grid-template-columns: 1fr;
  margin-top: clamp(30px, 4.5vw, 52px);
}
@media (min-width: 760px) { .foot-main { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1024px) { .foot-main { grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.5fr); } }

.foot-col__title {
  margin-bottom: 14px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 700;
  letter-spacing: .22em; text-transform: uppercase;
  color: rgba(244, 239, 228, .52);
}
.foot-contact__row { display: flex; flex-wrap: wrap; gap: 4px 14px; padding-block: 5px; }
.foot-contact__key {
  min-width: 72px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em;
  color: var(--kiwi); line-height: 1.9;
}
.foot-contact__val { font-size: 15px; color: rgba(244, 239, 228, .9); font-variant-numeric: tabular-nums; }
.foot-note {
  margin-top: 12px; max-width: 34em;
  font-size: 12.5px; line-height: 1.8; color: rgba(244, 239, 228, .56);
}

.foot-cols { display: grid; gap: clamp(20px, 3vw, 34px); grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (min-width: 1024px) { .foot-cols { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.foot-links li + li { margin-top: 10px; }
.foot-links a {
  position: relative; display: inline-block;
  font-size: 15px; color: rgba(244, 239, 228, .86);
  transition: color .2s var(--ease), transform .2s var(--ease);
}
.foot-links a::before {
  content: ""; position: absolute; left: -14px; top: .82em;
  width: 8px; height: 2px; background: var(--kiwi);
  opacity: 0; transition: opacity .2s var(--ease);
}
.foot-links a:hover { color: var(--cyan); transform: translateX(3px); }
.foot-links a:hover::before { opacity: 1; }

.foot-base {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 14px 24px;
  margin-top: clamp(30px, 4.5vw, 54px);
  padding-top: 20px;
  border-top: 1px solid rgba(244, 239, 228, .16);
}
.foot-base__legal {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em;
  color: rgba(244, 239, 228, .6); line-height: 1.8;
}
.to-top {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 18px; border-radius: var(--r-pill);
  border: 1px solid rgba(143, 193, 59, .5);
  color: var(--paper); font-size: 12px; letter-spacing: .14em;
  transition: background-color .2s var(--ease), color .2s var(--ease), transform .18s var(--ease);
}
.to-top:hover { background: var(--kiwi); color: var(--ink); transform: translateY(-2px); }

/* ---------- 13. 显现动效 ---------- */
html.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
html.js-reveal [data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- 14. 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;
  }
  html.js-reveal [data-reveal] { opacity: 1; transform: none; }
  .btn:hover, .rail__cta:hover, .to-top:hover, .foot-links a:hover { transform: none; }
}