/* ============================================================
   千亿球友会 · 共享样式 /assets/site.css
   山地数据夜航：深靛底 / 雾岭青面板 / 柠黄节点 / 陶土橙状态
   ============================================================ */

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

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

body { margin: 0; }

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

img { height: auto; }

button, input, select, textarea { font: inherit; color: inherit; }

button { background: none; border: 0; cursor: pointer; }

a { color: inherit; }

table { border-collapse: collapse; width: 100%; }

/* ---------- 2. Tokens ---------- */
:root {
  /* 色彩 */
  --ink-950: #0E1A30;
  --ink-900: #0A1425;
  --indigo: #1B2A4A;
  --teal: #3E7C7B;
  --lime: #D9F25C;
  --clay: #E07A4F;
  --paper: #F4F1E8;
  --mist: #9FB0C8;
  --rock: #5C6B82;
  --pale: #D7E4E1;
  --white: #FFFFFF;

  /* 结构与节奏 */
  --rail-w: 72px;
  --maxw: 1440px;
  --pad-x: clamp(20px, 4vw, 64px);
  --gutter: 24px;

  /* 线条与层次 */
  --line: rgba(159, 176, 200, 0.22);
  --line-strong: rgba(159, 176, 200, 0.42);
  --line-lime: rgba(217, 242, 92, 0.55);

  /* 动效 */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 220ms;

  /* 字体 */
  --font-head: 'Source Han Sans SC VF', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Source Han Sans SC', 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Mono', 'Roboto Mono', 'SFMono-Regular', monospace;
}

/* ---------- 3. 基础排版 ---------- */
body {
  background: var(--ink-950);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-kerning: normal;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 200;
  line-height: 1.08;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

h1 { font-size: clamp(3.4rem, 8vw, 7.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.6rem); }
h3 { font-size: clamp(1.35rem, 2.2vw, 2rem); font-weight: 400; line-height: 1.25; }
h4 { font-size: clamp(1.05rem, 1.5vw, 1.25rem); font-weight: 600; line-height: 1.4; }

p { text-wrap: pretty; }

strong, b { font-weight: 800; }

.u-heavy { font-weight: 800; letter-spacing: -0.02em; }

.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.prose { max-width: 68ch; color: var(--pale); }

.prose p { margin-bottom: 1.15em; }

.prose p:last-child { margin-bottom: 0; }

.prose a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid var(--line-lime);
}

.prose a:hover { border-bottom-color: var(--lime); }

.lede {
  max-width: 54ch;
  font-size: clamp(17px, 1.55vw, 20px);
  line-height: 1.72;
  color: var(--mist);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--lime);
  flex: none;
}

/* ---------- 4. 容器与网格 ---------- */
.shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

.shell--narrow { max-width: 980px; }

.section { padding-block: clamp(48px, 7vw, 120px); }
.section--tight { padding-block: clamp(32px, 4vw, 64px); }

.layout-7-5,
.layout-8-4 {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 48px);
  align-items: start;
}

@media (min-width: 901px) {
  .layout-7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
  .layout-8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
}

/* ---------- 5. 焦点与无障碍 ---------- */
:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 3px;
  box-shadow: 0 0 0 1px var(--ink-950);
  border-radius: 2px;
}

.skip-link {
  position: fixed;
  top: -80px;
  left: 12px;
  z-index: 320;
  padding: 12px 20px;
  background: var(--lime);
  color: var(--ink-950);
  font-weight: 800;
  font-size: 14px;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-radius: 4px;
  transition: top var(--dur) var(--ease);
}

.skip-link:focus {
  top: 12px;
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              color var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.btn:hover { transform: translateY(-2px); }

.btn--primary {
  background: var(--lime);
  color: var(--ink-950);
}

.btn--primary:hover { background: #E7FA82; }

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

.btn--ghost:hover {
  border-color: var(--lime);
  color: var(--lime);
  background: rgba(217, 242, 92, 0.07);
}

/* ---------- 7. 面包屑 ---------- */
.crumbs {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rock);
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.crumbs li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.crumbs li + li::before {
  content: "/";
  color: var(--rock);
  opacity: 0.7;
}

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

.crumbs a:hover { color: var(--lime); }

.crumbs [aria-current="page"] { color: var(--pale); }

/* ---------- 8. 卡片与标签 ---------- */
.card {
  position: relative;
  background: rgba(27, 42, 74, 0.55);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: clamp(18px, 2.4vw, 30px);
  transition: transform var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}

.card--link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.card--link:hover {
  transform: translateY(-2px);
  border-color: var(--line-lime);
  background: rgba(62, 124, 123, 0.22);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
  white-space: nowrap;
}

.tag--live {
  border-color: var(--line-lime);
  color: var(--lime);
}

.tag--save {
  border-color: rgba(224, 122, 79, 0.55);
  color: var(--clay);
}

/* ---------- 9. 图片容器基础 ---------- */
.figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(148deg, var(--indigo) 0%, var(--ink-900) 62%, rgba(62, 124, 123, 0.35) 100%);
}

.figure__media {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 400ms var(--ease);
}

.figure--wide .figure__media { aspect-ratio: 21 / 9; }
.figure--portrait .figure__media { aspect-ratio: 4 / 5; }
.figure--square .figure__media { aspect-ratio: 1 / 1; }

.figure--link:hover .figure__media { transform: scale(1.03); }

.figure__cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--rock);
}

/* ---------- 10. 背景图形工具 ---------- */
.contour {
  background-image:
    repeating-radial-gradient(ellipse 62% 84% at 14% 8%,
      transparent 0 42px, rgba(159, 176, 200, 0.13) 42px 43px),
    repeating-radial-gradient(ellipse 74% 96% at 86% 84%,
      transparent 0 58px, rgba(62, 124, 123, 0.18) 58px 59px);
}

.slant-top {
  position: relative;
}

.slant-top::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: clamp(28px, 5vw, 72px);
  background: var(--ink-950);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 38%);
  pointer-events: none;
}

/* ---------- 11. 渐显（JS 注入 .is-reveal） ---------- */
.is-reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms var(--ease), transform 520ms var(--ease);
}

.is-reveal.is-in {
  opacity: 1;
  transform: none;
}

/* ============================================================
   12. 头部：信号轨 / 状态胶囊 / 移动栏 / 抽屉
   ============================================================ */
.site-header {
  position: relative;
  z-index: 100;
}

/* --- 滚动进度 --- */
.qy-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 220;
  background: rgba(159, 176, 200, 0.14);
  pointer-events: none;
}

.qy-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: var(--lime);
  transition: width 90ms linear;
}

/* --- 信号轨（桌面：左侧竖条） --- */
.qy-rail {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--rail-w);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 18px 0 14px;
  background: rgba(10, 20, 37, 0.58);
  border-right: 1px solid var(--line);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: none;
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease);
}

.qy-rail::-webkit-scrollbar { display: none; }

.site-header.is-read .qy-rail {
  background: var(--indigo);
  border-right-color: var(--line-strong);
}

/* 品牌 */
.qy-brand {
  flex: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding-bottom: 12px;
  text-decoration: none;
  color: var(--paper);
}

.qy-brand__sigil {
  position: relative;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  flex: none;
}

.qy-brand__ring {
  position: absolute;
  inset: 0;
  border: 1px solid var(--line-lime);
  border-radius: 50%;
  transition: border-color var(--dur) var(--ease);
}

.qy-brand__ring::after {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
}

.qy-brand__node {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(217, 242, 92, 0.16);
}

.qy-brand:hover .qy-brand__ring { border-color: var(--lime); }

.qy-brand__name {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 12px;
  letter-spacing: 0.3em;
  line-height: 1;
  color: var(--paper);
}

/* 导航 */
.qy-nav {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 0;
}

.qy-nav__list {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  gap: 0;
}

.qy-nav__item { width: 100%; }

.qy-nav__link {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 7px;
  width: 100%;
  padding: 11px 0;
  text-decoration: none;
  color: var(--mist);
  transition: color 180ms var(--ease), background-color 180ms var(--ease);
}

.qy-nav__link:hover,
.qy-nav__link:focus-visible {
  color: var(--lime);
  background: rgba(62, 124, 123, 0.24);
}

.qy-nav__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--rock);
  flex: none;
  transition: background-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.qy-nav__label {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.2em;
  line-height: 1;
}

.qy-nav__num {
  font-size: 9px;
  letter-spacing: 0.06em;
  color: var(--rock);
  transition: color 180ms var(--ease);
}

.qy-nav__link[aria-current="page"] { color: var(--lime); }

.qy-nav__link[aria-current="page"] .qy-nav__dot {
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(217, 242, 92, 0.22);
}

.qy-nav__link[aria-current="page"] .qy-nav__num { color: var(--lime); }

.qy-nav__link[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  bottom: 9px;
  width: 2px;
  background: var(--lime);
}

/* 轨底 */
.qy-rail__foot {
  flex: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  width: calc(100% - 18px);
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.qy-rail__pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
  animation: qyPulse 2.8s ease-out infinite;
}

@keyframes qyPulse {
  0%   { box-shadow: 0 0 0 0 rgba(217, 242, 92, 0.45); }
  70%  { box-shadow: 0 0 0 9px rgba(217, 242, 92, 0); }
  100% { box-shadow: 0 0 0 0 rgba(217, 242, 92, 0); }
}

.qy-rail__save {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--clay);
  line-height: 1.4;
}

.qy-rail__save-k { color: var(--mist); }

/* --- 状态胶囊 --- */
.qy-status {
  position: fixed;
  top: 18px;
  right: 22px;
  z-index: 190;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(14, 26, 48, 0.66);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist);
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease);
}

.site-header.is-read .qy-status {
  background: rgba(27, 42, 74, 0.94);
  border-color: var(--line-strong);
}

.qy-status__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px rgba(217, 242, 92, 0.16);
}

.qy-status__stamp { color: var(--clay); }

/* --- 遮罩 --- */
.qy-scrim { display: none; }

/* --- 移动栏 --- */
.qy-bar { display: none; }

/* ============================================================
   13. 页脚
   ============================================================ */
.qy-footer {
  position: relative;
  background: var(--ink-950);
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: 14px;
}

.qy-footer__ridge {
  height: 48px;
  border-bottom: 1px solid rgba(159, 176, 200, 0.14);
  background-image:
    repeating-radial-gradient(ellipse 230px 36px at 20% 100%,
      transparent 0 18px, rgba(62, 124, 123, 0.34) 18px 19px),
    repeating-radial-gradient(ellipse 330px 48px at 74% 100%,
      transparent 0 26px, rgba(159, 176, 200, 0.22) 26px 27px);
}

.qy-footer__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(36px, 5vw, 64px) var(--pad-x) clamp(28px, 4vw, 44px);
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.3fr;
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
}

.qy-footer__brand { display: flex; flex-direction: column; gap: 12px; }

.qy-footer__logo {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-head);
  font-weight: 200;
  font-size: clamp(26px, 2.6vw, 36px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--paper);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.qy-footer__logo:hover { color: var(--lime); }

.qy-footer__logo-en {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--lime);
}

.qy-footer__tag {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.qy-footer__icp {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--rock);
}

.qy-footer__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--lime);
  margin-bottom: 16px;
  line-height: 1.4;
}

.qy-footer__list {
  display: flex;
  flex-direction: column;
  gap: 9px;
  line-height: 1.6;
}

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

.qy-footer__list a:hover { color: var(--lime); }

.qy-footer__state {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.qy-footer__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
  flex: none;
  box-shadow: 0 0 0 3px rgba(217, 242, 92, 0.14);
}

.qy-footer__k {
  display: inline-block;
  min-width: 52px;
  margin-right: 8px;
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--rock);
}

.qy-footer__contact .qy-footer__list { gap: 12px; }

.qy-footer__note {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed rgba(159, 176, 200, 0.2);
  font-size: 12px;
  line-height: 1.65;
  color: var(--rock);
}

.qy-footer__base {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 18px var(--pad-x) clamp(22px, 3vw, 30px);
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 26px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--rock);
}

.qy-footer__copy { font-family: var(--font-mono); }

.qy-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

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

.qy-footer__legal a:hover { color: var(--lime); }

/* ============================================================
   14. 响应式
   ============================================================ */

/* 平板：页脚两列 */
@media (max-width: 1080px) and (min-width: 901px) {
  .qy-footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: 34px 40px;
  }
}

@media (min-width: 901px) {
  body { padding-left: var(--rail-w); }
}

/* ---- 移动 / 小屏平板 ---- */
@media (max-width: 900px) {
  body { padding-top: 58px; }

  .qy-progress { top: 58px; }

  .qy-status { display: none; }

  /* 移动栏 */
  .qy-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 205;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 16px;
    background: rgba(10, 20, 37, 0.94);
    border-bottom: 1px solid var(--line);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    transition: background-color 200ms var(--ease);
  }

  .site-header.is-read .qy-bar { background: var(--indigo); }

  .qy-bar__brand {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    font-family: var(--font-head);
    font-weight: 800;
    font-size: 15px;
    letter-spacing: 0.14em;
    color: var(--paper);
    text-decoration: none;
  }

  .qy-bar__brand-en {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--lime);
  }

  .qy-bar__toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 15px;
    border: 1px solid var(--line-strong);
    border-radius: 999px;
    color: var(--paper);
    font-size: 12px;
    letter-spacing: 0.14em;
    transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
  }

  .qy-bar__toggle:hover { border-color: var(--lime); color: var(--lime); }

  .qy-bar__toggle[aria-expanded="true"] {
    border-color: var(--lime);
    color: var(--lime);
  }

  .qy-bar__toggle-lines {
    position: relative;
    display: block;
    width: 14px;
    height: 10px;
    flex: none;
  }

  .qy-bar__toggle-lines::before,
  .qy-bar__toggle-lines::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    height: 1.5px;
    background: currentColor;
    transition: transform 200ms var(--ease);
  }

  .qy-bar__toggle-lines::before { top: 1px; }
  .qy-bar__toggle-lines::after { bottom: 1px; }

  .qy-bar__toggle[aria-expanded="true"] .qy-bar__toggle-lines::before {
    transform: translateY(3.5px) rotate(45deg);
  }

  .qy-bar__toggle[aria-expanded="true"] .qy-bar__toggle-lines::after {
    transform: translateY(-3.5px) rotate(-45deg);
  }

  /* 信号轨变底部抽屉 */
  .qy-rail {
    inset: auto 0 0 0;
    width: 100%;
    max-height: 84vh;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 16px 18px 24px;
    border-right: 0;
    border-top: 1px solid var(--line-strong);
    border-radius: 16px 16px 0 0;
    background: var(--indigo);
    transform: translateY(102%);
    transition: transform 260ms var(--ease);
    z-index: 215;
    overflow-y: auto;
  }

  .qy-rail[data-open] { transform: translateY(0); }

  .qy-brand {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    padding-bottom: 14px;
    margin-bottom: 6px;
    border-bottom: 1px solid var(--line);
  }

  .qy-brand__sigil { width: 30px; height: 30px; }

  .qy-brand__name {
    writing-mode: horizontal-tb;
    font-size: 14px;
    letter-spacing: 0.24em;
  }

  .qy-nav {
    flex: none;
    width: 100%;
    display: block;
    padding: 0;
  }

  .qy-nav__list { align-items: stretch; }

  .qy-nav__link {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    padding: 14px 8px;
    border-bottom: 1px solid rgba(159, 176, 200, 0.14);
  }

  .qy-nav__label {
    writing-mode: horizontal-tb;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.1em;
  }

  .qy-nav__num { margin-left: auto; font-size: 11px; }

  .qy-nav__link[aria-current="page"]::before { display: none; }

  .qy-rail__foot {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-top: 14px;
    padding-top: 14px;
  }

  .qy-rail__save {
    flex-direction: row;
    align-items: baseline;
    gap: 6px;
    font-size: 12px;
  }

  /* 遮罩 */
  .qy-scrim {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 210;
    background: rgba(6, 12, 24, 0.62);
    opacity: 0;
    pointer-events: none;
    transition: opacity 200ms var(--ease);
  }

  .qy-scrim[data-open] {
    opacity: 1;
    pointer-events: auto;
  }

  html.is-nav-open { overflow: hidden; }

  /* 页脚改为单列流 */
  .qy-footer { margin-top: 0; }

  .qy-footer__inner {
    grid-template-columns: 1fr;
    gap: 30px;
    padding-top: 34px;
  }

  .qy-footer__base {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}

@media (max-width: 560px) {
  body { font-size: 16px; }

  .qy-footer__ridge { height: 36px; }

  .qy-footer__legal { gap: 8px 16px; }

  .qy-nav__link { padding: 13px 6px; }
}

/* ---------- 15. 减少动效 ---------- */
@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;
    scroll-behavior: auto !important;
  }

  .is-reveal { opacity: 1; transform: none; }

  .qy-rail__pulse { animation: none; }
}