/* =====================================================================
   开元主页 · ky-origin.com.cn
   共享外壳样式 /assets/site.css
   气质：赛博黔地·数字山门 —— 铜金轨道 + 纸张主面 + 蓝图坐标 + 霓虹状态
   ===================================================================== */

/* ---------- 1. 变量 ---------- */
:root {
  --ky-copper-900: #2A1A0F;
  --ky-copper-600: #A9662B;
  --ky-copper-300: #E0AC63;
  --ky-karst-800: #26333A;
  --ky-karst-400: #78898F;
  --ky-karst-100: #E4E9E8;
  --ky-paper: #F6F1E7;
  --ky-ink: #14181A;
  --ky-neon-violet: #7A5CFF;
  --ky-neon-cyan: #1FB6C4;
  --ky-signal-ok: #3E9E68;
  --ky-signal-warn: #D9971F;
  --ky-signal-stop: #BE4433;

  --ky-rail-w: 240px;
  --ky-page-max: 1200px;
  --ky-pad: clamp(20px, 4vw, 56px);

  --ky-font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", serif;
  --ky-font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --ky-font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ky-ease: cubic-bezier(.2, .7, .2, 1);
  --ky-line: rgba(38, 51, 58, .16);
  --ky-line-strong: rgba(38, 51, 58, .36);
  --ky-grid-line: rgba(120, 137, 143, .22);
  --ky-paper-raised: #FBF7EE;
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  background: var(--ky-paper);
  color: var(--ky-ink);
  font-family: var(--ky-font-sans);
  font-size: clamp(16px, 1.05vw, 18px);
  font-weight: 400;
  line-height: 1.85;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

/* ---------- 3. 焦点与无障碍 ---------- */
:focus-visible {
  outline: 2px solid var(--ky-neon-cyan);
  outline-offset: 2px;
}

.ky-header :focus-visible,
.ky-footer :focus-visible {
  outline: 2px solid var(--ky-neon-cyan);
  outline-offset: 2px;
  box-shadow: 0 0 0 1px var(--ky-copper-900);
}

#main-content { scroll-margin-top: 84px; }

/* ---------- 4. 主结构与容器 ---------- */
.ky-main {
  display: block;
  padding-block: clamp(32px, 5vw, 72px) 0;
}

.ky-shell {
  width: 100%;
  max-width: var(--ky-page-max);
  margin-inline: auto;
  padding-inline: var(--ky-pad);
}

.ky-blueprint {
  position: relative;
  isolation: isolate;
}

.ky-blueprint::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: .5;
  background-image:
    linear-gradient(var(--ky-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--ky-grid-line) 1px, transparent 1px);
  background-size: clamp(48px, 6vw, 88px) clamp(48px, 6vw, 88px);
}

.ky-blueprint > * { position: relative; z-index: 1; }

/* ---------- 5. 跳过链接 ---------- */
.ky-skip {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--ky-copper-300);
  color: var(--ky-copper-900);
  font-family: var(--ky-font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-decoration: none;
  transform: translateY(-220%);
  transition: transform 180ms var(--ky-ease);
}

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

/* ---------- 6. 头部外壳（移动优先：粘性顶栏 + 抽屉） ---------- */
.ky-header {
  position: sticky;
  top: 0;
  z-index: 60;
  width: 100%;
  min-height: 64px;
  background: var(--ky-copper-900);
  color: var(--ky-karst-100);
  border-bottom: 1px solid rgba(224, 172, 99, .26);
}

.ky-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 10px 16px;
}

.ky-header__brand { min-width: 0; }

/* 品牌 */
.ky-brand {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  text-decoration: none;
}

.ky-brand__mark {
  position: relative;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border: 1px solid var(--ky-copper-300);
  background: radial-gradient(circle at 32% 30%, rgba(224, 172, 99, .55), transparent 66%);
}

.ky-brand__mark::before {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid rgba(224, 172, 99, .55);
}

.ky-brand__mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  margin: -2.5px 0 0 -2.5px;
  background: var(--ky-neon-cyan);
  box-shadow: 0 0 8px var(--ky-neon-cyan);
}

.ky-brand__text { display: block; min-width: 0; }

.ky-brand__line {
  display: block;
  font-family: var(--ky-font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ky-copper-300);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ky-brand__tag {
  display: none;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.6;
  color: rgba(228, 233, 232, .66);
}

/* 抽屉按钮 */
.ky-nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid rgba(224, 172, 99, .45);
  background: rgba(224, 172, 99, .06);
  color: var(--ky-copper-300);
  transition: background-color 180ms var(--ky-ease), color 180ms var(--ky-ease);
}

.ky-nav-toggle:hover {
  background: var(--ky-copper-300);
  color: var(--ky-copper-900);
}

.ky-nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ky-nav-toggle__bars i {
  display: block;
  width: 18px;
  height: 1px;
  background: currentColor;
  transition: transform 200ms var(--ky-ease), opacity 200ms var(--ky-ease);
}

.ky-nav-toggle__label {
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .16em;
}

.ky-header[data-open="true"] .ky-nav-toggle__bars i:nth-child(1) { transform: translateY(5px) rotate(45deg); }
.ky-header[data-open="true"] .ky-nav-toggle__bars i:nth-child(2) { opacity: 0; }
.ky-header[data-open="true"] .ky-nav-toggle__bars i:nth-child(3) { transform: translateY(-5px) rotate(-45deg); }

/* ---------- 7. 导航（移动端抽屉） ---------- */
.ky-nav {
  position: fixed;
  top: 64px;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 70;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 22px 18px 40px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: linear-gradient(180deg, #1F1209, var(--ky-copper-900) 42%);
  border-top: 1px solid rgba(224, 172, 99, .26);
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 200ms var(--ky-ease), transform 200ms var(--ky-ease), visibility 0s linear 200ms;
}

.ky-header[data-open="true"] .ky-nav {
  transform: none;
  opacity: 1;
  visibility: visible;
  transition-delay: 0s;
}

.ky-nav__eyebrow {
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ky-karst-400);
}

.ky-nav__list {
  display: flex;
  flex-direction: column;
}

.ky-nav__item + .ky-nav__item { border-top: 1px solid rgba(228, 233, 232, .10); }

.ky-nav__link {
  display: grid;
  grid-template-columns: 30px 1fr 12px;
  align-items: center;
  gap: 10px;
  padding: 13px 8px 13px 4px;
  border-left: 2px solid transparent;
  text-decoration: none;
  color: rgba(228, 233, 232, .84);
  transition: color 180ms var(--ky-ease), background-color 180ms var(--ky-ease), border-color 180ms var(--ky-ease), transform 180ms var(--ky-ease);
}

.ky-nav__index {
  font-family: var(--ky-font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ky-karst-400);
  transition: color 180ms var(--ky-ease);
}

.ky-nav__label {
  font-size: 14px;
  letter-spacing: .06em;
}

.ky-nav__tick {
  justify-self: end;
  width: 9px;
  height: 9px;
  border: 1px solid var(--ky-karst-400);
  border-radius: 50%;
  transition: border-color 180ms var(--ky-ease), background-color 180ms var(--ky-ease), box-shadow 180ms var(--ky-ease);
}

.ky-nav__link:hover {
  color: #FFFFFF;
  background: rgba(224, 172, 99, .10);
  border-left-color: var(--ky-copper-300);
  transform: translateX(2px);
}

.ky-nav__link:hover .ky-nav__index { color: var(--ky-copper-300); }

.ky-nav__link:hover .ky-nav__tick {
  border-color: var(--ky-copper-300);
  background: var(--ky-copper-300);
}

.ky-nav__link[aria-current="page"] {
  color: var(--ky-copper-300);
  border-left-color: var(--ky-neon-cyan);
  background: linear-gradient(90deg, rgba(31, 182, 196, .16), transparent 72%);
}

.ky-nav__link[aria-current="page"] .ky-nav__index { color: var(--ky-neon-cyan); }

.ky-nav__link[aria-current="page"] .ky-nav__tick {
  border-color: var(--ky-neon-cyan);
  background: var(--ky-neon-cyan);
  box-shadow: 0 0 8px rgba(31, 182, 196, .6);
}

/* 状态面板 */
.ky-nav__status {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px;
  border: 1px solid rgba(228, 233, 232, .16);
  background: rgba(20, 24, 26, .38);
}

.ky-nav__status-title {
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--ky-copper-300);
}

.ky-nav__status-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.ky-status {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 12px;
}

.ky-status__name { color: rgba(228, 233, 232, .78); }

.ky-status__value {
  margin-left: auto;
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ky-copper-300);
}

/* 状态灯：形状 + 颜色双通道 */
.ky-lamp {
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  border: 1px solid currentColor;
  border-radius: 50%;
  color: var(--ky-karst-400);
}

.ky-lamp--ok {
  color: var(--ky-signal-ok);
  border-color: var(--ky-signal-ok);
  background: var(--ky-signal-ok);
  box-shadow: 0 0 8px rgba(62, 158, 104, .55);
}

.ky-lamp--warn {
  color: var(--ky-signal-warn);
  border: 2px solid var(--ky-signal-warn);
  border-right-color: transparent;
  background: transparent;
}

.ky-lamp--stop {
  color: var(--ky-signal-stop);
  border-color: var(--ky-signal-stop);
  background: repeating-linear-gradient(90deg, var(--ky-signal-stop) 0 2px, transparent 2px 4px);
}

/* 轨道底部 */
.ky-nav__foot {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
}

.ky-copy {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid rgba(224, 172, 99, .5);
  background: rgba(224, 172, 99, .06);
  color: var(--ky-copper-300);
  font-size: 12px;
  letter-spacing: .12em;
  transition: background-color 180ms var(--ky-ease), color 180ms var(--ky-ease), border-color 180ms var(--ky-ease);
}

.ky-copy:hover {
  background: var(--ky-copper-300);
  color: var(--ky-copper-900);
}

.ky-copy[data-copied="true"] {
  border-color: var(--ky-signal-ok);
  color: var(--ky-signal-ok);
}

.ky-copy__hint {
  font-family: var(--ky-font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--ky-karst-400);
}

.ky-copy:hover .ky-copy__hint { color: rgba(42, 26, 15, .72); }

.ky-nav__meta {
  font-family: var(--ky-font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--ky-karst-400);
}

/* ---------- 8. 页脚 ---------- */
.ky-footer {
  position: relative;
  margin-top: clamp(64px, 9vw, 140px);
  background: var(--ky-copper-900);
  color: var(--ky-karst-100);
}

.ky-footer__ridge {
  height: clamp(48px, 7vw, 84px);
  background-color: var(--ky-copper-900);
  background-image: repeating-linear-gradient(115deg, rgba(224, 172, 99, .14) 0 2px, transparent 2px 16px);
  clip-path: polygon(0 100%, 0 62%, 8% 38%, 14% 56%, 22% 22%, 31% 58%, 38% 44%, 47% 12%, 56% 52%, 65% 30%, 73% 60%, 81% 40%, 89% 64%, 95% 46%, 100% 68%, 100% 100%);
}

.ky-footer__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 64px);
  max-width: var(--ky-page-max);
  margin-inline: auto;
  padding: clamp(28px, 4vw, 56px) var(--ky-pad) clamp(24px, 3vw, 40px);
}

.ky-footer__wordmark {
  font-family: var(--ky-font-display);
  font-weight: 300;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.1;
  letter-spacing: .02em;
  color: var(--ky-copper-300);
}

.ky-footer__domain {
  margin-top: 8px;
  font-family: var(--ky-font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ky-karst-400);
}

.ky-footer__note {
  margin-top: 14px;
  max-width: 34ch;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(228, 233, 232, .62);
}

.ky-footer__cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 32px);
}

.ky-footer__col-title {
  margin-bottom: 14px;
  font-family: var(--ky-font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .18em;
  color: var(--ky-copper-300);
}

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

.ky-footer__link {
  display: inline-block;
  font-size: 14px;
  text-decoration: none;
  color: rgba(228, 233, 232, .78);
  border-bottom: 1px solid transparent;
  transition: color 180ms var(--ky-ease), border-color 180ms var(--ky-ease);
}

.ky-footer__link:hover {
  color: var(--ky-neon-cyan);
  border-bottom-color: var(--ky-neon-cyan);
}

.ky-footer__contact,
.ky-footer__legal {
  max-width: var(--ky-page-max);
  margin-inline: auto;
  padding-inline: var(--ky-pad);
}

.ky-footer__contact {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  padding-bottom: clamp(16px, 2vw, 24px);
  font-size: 13px;
  color: rgba(228, 233, 232, .72);
}

.ky-footer__contact::before {
  content: "";
  position: absolute;
  top: 0;
  right: var(--ky-pad);
  left: var(--ky-pad);
  height: 1px;
  background: rgba(228, 233, 232, .12);
}

.ky-footer__contact-line { letter-spacing: .02em; }

.ky-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  padding-top: 14px;
  padding-bottom: clamp(22px, 3vw, 36px);
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ky-karst-400);
}

/* ---------- 9. 阅读进度条（脚本注入） ---------- */
.ky-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 80;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--ky-neon-cyan), var(--ky-neon-violet));
  pointer-events: none;
}

/* ---------- 10. 通用内容组件 ---------- */
.ky-section { padding-block: clamp(36px, 5.5vw, 84px); }

.ky-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 18px;
  padding-bottom: 14px;
  margin-bottom: clamp(22px, 3vw, 40px);
  border-bottom: 1px solid var(--ky-line);
}

.ky-index {
  font-family: var(--ky-font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ky-copper-600);
}

.ky-eyebrow {
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ky-karst-400);
}

.ky-title {
  font-family: var(--ky-font-display);
  font-weight: 300;
  font-size: clamp(32px, 4.6vw, 60px);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--ky-karst-800);
}

.ky-title--hero {
  font-size: clamp(44px, 7vw, 96px);
  line-height: 1.04;
}

.ky-lede {
  max-width: 58ch;
  font-size: clamp(15px, 1.1vw, 18px);
  color: var(--ky-karst-800);
}

.ky-text {
  max-width: 66ch;
  color: var(--ky-ink);
}

.ky-grid {
  display: grid;
  gap: clamp(16px, 2vw, 28px);
}

.ky-grid--2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.ky-grid--3 { grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); }
.ky-grid--4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }

/* 纸张叠层卡片 */
.ky-card {
  position: relative;
  padding: clamp(18px, 2vw, 28px);
  background: var(--ky-paper-raised);
  border: 1px solid var(--ky-line);
  transition: transform 200ms var(--ky-ease), border-color 200ms var(--ky-ease), box-shadow 200ms var(--ky-ease);
}

.ky-card::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: 10px;
  height: 10px;
  border-top: 1px solid var(--ky-copper-600);
  border-right: 1px solid var(--ky-copper-600);
}

.ky-card:hover,
.ky-card:focus-within {
  border-color: var(--ky-copper-600);
  box-shadow: 6px 6px 0 rgba(169, 102, 43, .10);
  transform: translateY(-2px);
}

.ky-card__label {
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ky-copper-600);
}

.ky-card__title {
  margin-top: 10px;
  font-size: clamp(18px, 1.6vw, 22px);
  font-weight: 500;
  line-height: 1.45;
  color: var(--ky-karst-800);
}

.ky-card__text {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ky-karst-800);
}

/* 按钮 */
.ky-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid var(--ky-copper-600);
  background: var(--ky-copper-600);
  color: #FFF6E8;
  font-size: 14px;
  letter-spacing: .08em;
  text-decoration: none;
  transition: background-color 180ms var(--ky-ease), border-color 180ms var(--ky-ease), color 180ms var(--ky-ease);
}

.ky-btn:hover {
  background: var(--ky-copper-900);
  border-color: var(--ky-copper-900);
}

.ky-btn--ghost {
  background: transparent;
  border-color: var(--ky-line-strong);
  color: var(--ky-karst-800);
}

.ky-btn--ghost:hover {
  background: var(--ky-karst-800);
  border-color: var(--ky-karst-800);
  color: var(--ky-paper);
}

.ky-btn--cool {
  background: transparent;
  border-color: var(--ky-neon-violet);
  color: var(--ky-neon-violet);
}

.ky-btn--cool:hover {
  background: var(--ky-neon-violet);
  border-color: var(--ky-neon-violet);
  color: #FFFFFF;
}

/* 标签 */
.ky-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--ky-line-strong);
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ky-karst-800);
}

.ky-tag--warm { border-color: var(--ky-copper-600); color: var(--ky-copper-600); }
.ky-tag--cool { border-color: var(--ky-neon-violet); color: var(--ky-neon-violet); }

/* 面包屑 */
.ky-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ky-karst-400);
}

.ky-breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.ky-breadcrumb__item + .ky-breadcrumb__item::before {
  content: "/";
  color: var(--ky-line-strong);
}

.ky-breadcrumb a {
  text-decoration: none;
  color: inherit;
}

.ky-breadcrumb a:hover { color: var(--ky-copper-600); }

.ky-breadcrumb [aria-current="page"] { color: var(--ky-karst-800); }

/* 图片容器 */
.ky-figure {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ky-figure__media {
  position: relative;
  width: 100%;
  aspect-ratio: var(--ky-figure-ratio, 16 / 9);
  overflow: hidden;
  border: 1px solid var(--ky-line);
  background: linear-gradient(150deg, var(--ky-karst-100), #D7DEDD 58%, #C9D3D2);
}

.ky-figure__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--ky-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--ky-grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
}

.ky-figure__media img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ky-figure__caption {
  font-family: var(--ky-font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--ky-karst-400);
}

/* 分隔线 */
.ky-rule {
  height: 1px;
  margin-block: clamp(26px, 4vw, 56px);
  border: 0;
  background: var(--ky-line);
}

.ky-ridge {
  height: clamp(28px, 4vw, 48px);
  background-color: var(--ky-copper-600);
  background-image: repeating-linear-gradient(115deg, rgba(42, 26, 15, .34) 0 2px, transparent 2px 14px);
  clip-path: polygon(0 100%, 0 70%, 7% 42%, 13% 62%, 21% 24%, 30% 58%, 38% 44%, 47% 12%, 56% 52%, 65% 30%, 73% 60%, 81% 40%, 89% 64%, 95% 46%, 100% 68%, 100% 100%);
}

/* ---------- 11. 平板与桌面 ---------- */
@media (min-width: 640px) {
  .ky-footer__cols { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  body { padding-left: var(--ky-rail-w); }

  .ky-main { padding-block: clamp(40px, 4vw, 80px) 0; }

  .ky-header {
    position: fixed;
    top: 0;
    right: auto;
    bottom: 0;
    left: 0;
    width: var(--ky-rail-w);
    min-height: 0;
    border-bottom: 0;
    border-right: 1px solid rgba(224, 172, 99, .26);
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .ky-header__inner {
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: clamp(18px, 3vh, 32px);
    min-height: 100%;
    padding: clamp(24px, 3.4vh, 40px) 20px 26px;
  }

  .ky-brand__text { padding-top: 2px; }
  .ky-brand__tag { display: block; }
  .ky-nav-toggle { display: none; }

  .ky-nav {
    position: static;
    inset: auto;
    z-index: auto;
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: 18px;
    padding: 0;
    overflow: visible;
    background: none;
    border-top: 0;
    transform: none;
    opacity: 1;
    visibility: visible;
    transition: none;
  }

  .ky-progress {
    top: 0;
    right: auto;
    left: var(--ky-rail-w);
    width: 2px;
    height: 0;
    background: linear-gradient(180deg, var(--ky-neon-cyan), var(--ky-neon-violet));
  }

  .ky-footer__inner { grid-template-columns: minmax(220px, 1fr) 2.6fr; }
}

/* 移动端抽屉内部顺序：状态概览在前 */
@media (max-width: 1023px) {
  .ky-nav__eyebrow { order: 1; }
  .ky-nav__status { order: 2; }
  .ky-nav__list { order: 3; }
  .ky-nav__foot { order: 4; }
}

/* ---------- 12. 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }

  .ky-card:hover,
  .ky-card:focus-within,
  .ky-nav__link:hover { transform: none; }

  .ky-skip { transition: none; }
}