/* ==========================================================================
   人生就是搏综合体育 · /assets/site.css
   共享外壳：reset / 设计变量 / 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%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--nx-midnight);
  color: var(--nx-white);
  font-family: var(--nx-body);
  font-size: 17px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, pre { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
table { width: 100%; border-collapse: collapse; }
main { display: block; }
[hidden] { display: none !important; }

/* ---------- 2. 设计变量 ---------- */
:root {
  /* 品牌色 */
  --nx-midnight: #0B1230;
  --nx-cabin: #141E48;
  --nx-cabin-2: #1B2757;
  --nx-ink: #211610;
  --nx-cream: #F3E9D6;
  --nx-cyan: #4CF0DA;
  --nx-orange: #FF6A2B;
  --nx-red: #D8452F;
  --nx-gold: #FFC24D;
  --nx-mist: #8FA3CC;
  --nx-white: #E9F0FF;
  --nx-brown: #2A1C14;

  /* 线条与叠层 */
  --nx-line: rgba(76, 240, 218, 0.16);
  --nx-line-soft: rgba(143, 163, 204, 0.24);
  --nx-glass: rgba(11, 18, 48, 0.9);

  /* 尺寸 */
  --nx-shell: 1240px;
  --nx-narrow: 860px;
  --nx-gutter: clamp(18px, 4vw, 44px);
  --nx-r-sm: 10px;
  --nx-r-md: 16px;
  --nx-r-lg: 24px;
  --nx-r-xl: 34px;
  --nx-r-pill: 999px;

  /* 字体族 */
  --nx-display: "Arial Narrow", "HelveticaNeue-CondensedBold", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --nx-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --nx-mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, "Courier New", monospace;

  /* 动效 */
  --nx-shadow: 0 18px 44px -26px rgba(3, 7, 22, 0.95);
  --nx-ease: cubic-bezier(0.22, 0.8, 0.3, 1);
  --nx-t: 220ms;
}

/* ---------- 3. 基础排版 ---------- */
h1, h2, h3, h4 {
  font-family: var(--nx-display);
  font-weight: 800;
  letter-spacing: -0.015em;
  line-height: 1.12;
}

h1 { font-size: clamp(34px, 5.2vw, 64px); }
h2 { font-size: clamp(26px, 3.4vw, 42px); }
h3 { font-size: clamp(20px, 2.2vw, 27px); }

p { text-wrap: pretty; }
strong, b { font-weight: 700; }

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

.nx-link {
  color: var(--nx-cyan);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.nx-link:hover { color: var(--nx-gold); }

/* 焦点可见 */
:focus-visible {
  outline: 2px solid var(--nx-cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

/* 跳转链接 */
.nx-skip {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 20px;
  background: var(--nx-cyan);
  color: var(--nx-midnight);
  font-weight: 700;
  border-radius: 0 0 16px 16px;
  transition: top 180ms var(--nx-ease);
}
.nx-skip:focus { top: 0; }

/* ---------- 4. 布局工具 ---------- */
.nx-shell {
  width: 100%;
  max-width: var(--nx-shell);
  margin-inline: auto;
  padding-inline: var(--nx-gutter);
}
.nx-shell--narrow { max-width: var(--nx-narrow); }

.nx-stack { display: grid; gap: clamp(14px, 2vw, 22px); }

.nx-grid {
  display: grid;
  gap: clamp(14px, 2vw, 24px);
  grid-template-columns: repeat(auto-fit, minmax(255px, 1fr));
}
.nx-grid--2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.nx-grid--3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.nx-grid--4 { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }

.nx-section { padding-block: clamp(48px, 7vw, 104px); }
.nx-section--cabin { background: var(--nx-cabin); }
.nx-section--cream { background: var(--nx-cream); color: var(--nx-brown); }

.nx-diagonal {
  height: 1px;
  border: 0;
  background: linear-gradient(90deg, transparent, rgba(76, 240, 218, 0.55), rgba(255, 106, 43, 0.55), transparent);
  transform: rotate(-1.1deg);
}

/* ---------- 5. 按钮 / 胶囊 / 状态 ---------- */
.nx-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: var(--nx-r-pill);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition: transform var(--nx-t) var(--nx-ease), background-color var(--nx-t) linear,
              color var(--nx-t) linear, border-color var(--nx-t) linear;
}
.nx-btn:hover { transform: translateY(-1px); }
.nx-btn--hot {
  background: var(--nx-orange);
  color: var(--nx-ink);
  box-shadow: 0 12px 26px -16px rgba(255, 106, 43, 0.95);
}
.nx-btn--hot:hover { background: #FF824F; }
.nx-btn--ghost {
  background: rgba(76, 240, 218, 0.1);
  color: var(--nx-cyan);
  border-color: rgba(76, 240, 218, 0.42);
}
.nx-btn--ghost:hover { background: rgba(76, 240, 218, 0.2); color: #D8FFF8; }
.nx-btn--line {
  background: transparent;
  color: var(--nx-white);
  border-color: var(--nx-line-soft);
}
.nx-btn--line:hover { border-color: var(--nx-cyan); color: var(--nx-cyan); }
.nx-btn--block { width: 100%; }

.nx-quiet {
  font-size: 13px;
  color: var(--nx-mist);
  padding-bottom: 2px;
  border-bottom: 1px dashed rgba(143, 163, 204, 0.5);
  transition: color var(--nx-t) linear, border-color var(--nx-t) linear;
}
.nx-quiet:hover { color: var(--nx-gold); border-color: var(--nx-gold); }

.nx-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: 1px solid var(--nx-line-soft);
  border-radius: var(--nx-r-pill);
  color: var(--nx-mist);
  font-family: var(--nx-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  line-height: 1.6;
}
.nx-pill--cyan { color: var(--nx-cyan); border-color: rgba(76, 240, 218, 0.45); background: rgba(76, 240, 218, 0.08); }
.nx-pill--hot { color: var(--nx-orange); border-color: rgba(255, 106, 43, 0.45); background: rgba(255, 106, 43, 0.1); }
.nx-pill--gold { color: var(--nx-gold); border-color: rgba(255, 194, 77, 0.45); background: rgba(255, 194, 77, 0.1); }

.nx-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--nx-r-sm);
  background: var(--nx-red);
  color: var(--nx-cream);
  font-family: var(--nx-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
}

.nx-dot {
  display: inline-block;
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--nx-orange);
  animation: nx-pulse-hot 2.4s ease-out infinite;
}
.nx-dot--cyan { background: var(--nx-cyan); animation-name: nx-pulse-cyan; }

@keyframes nx-pulse-hot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(255, 106, 43, 0.5); }
  60% { box-shadow: 0 0 0 7px rgba(255, 106, 43, 0); }
}
@keyframes nx-pulse-cyan {
  0%, 100% { box-shadow: 0 0 0 0 rgba(76, 240, 218, 0.5); }
  60% { box-shadow: 0 0 0 7px rgba(76, 240, 218, 0); }
}

/* ---------- 6. 章节头 / 目录型索引 ---------- */
.nx-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 32px);
  align-items: start;
  margin-bottom: clamp(24px, 3.2vw, 44px);
}
.nx-head__no {
  font-family: var(--nx-mono);
  font-size: clamp(38px, 6vw, 76px);
  line-height: 0.9;
  letter-spacing: -0.05em;
  color: var(--nx-cyan);
}
.nx-head__title { margin: 0; }
.nx-head__desc {
  margin-top: 10px;
  max-width: 64ch;
  color: var(--nx-mist);
  font-size: 16px;
}
.nx-section--cream .nx-head__no { color: var(--nx-red); }
.nx-section--cream .nx-head__desc { color: #5C4A3D; }

.nx-index { display: grid; }
.nx-index__row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: clamp(12px, 2vw, 22px);
  align-items: center;
  padding: 15px 6px;
  border-bottom: 1px solid var(--nx-line);
  transition: background-color var(--nx-t) linear, padding var(--nx-t) var(--nx-ease);
}
a.nx-index__row:hover { background: rgba(76, 240, 218, 0.07); padding-left: 12px; }
.nx-index__no { font-family: var(--nx-mono); font-size: 13px; color: var(--nx-cyan); }
.nx-index__title { font-family: var(--nx-display); font-weight: 800; font-size: clamp(17px, 2vw, 21px); }
.nx-index__meta { font-family: var(--nx-mono); font-size: 12px; color: var(--nx-mist); }
.nx-section--cream .nx-index__row { border-color: rgba(42, 28, 20, 0.18); }
.nx-section--cream .nx-index__no { color: var(--nx-red); }
.nx-section--cream .nx-index__meta { color: #6A5647; }

.nx-toc { display: grid; gap: 4px; }
.nx-toc__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--nx-r-md);
  color: var(--nx-mist);
  font-size: 14px;
  transition: background-color var(--nx-t) linear, color var(--nx-t) linear;
}
.nx-toc__link:hover { color: var(--nx-white); background: rgba(143, 163, 204, 0.12); }
.nx-toc__link[data-active="true"] {
  color: var(--nx-cyan);
  background: rgba(76, 240, 218, 0.12);
  box-shadow: inset 0 0 0 1px rgba(76, 240, 218, 0.35);
}

/* ---------- 7. 面板 / 卡片 / 数据 ---------- */
.nx-panel {
  background: var(--nx-cabin);
  border: 1px solid var(--nx-line);
  border-radius: var(--nx-r-lg);
  padding: clamp(18px, 2.4vw, 30px);
  box-shadow: var(--nx-shadow);
}
.nx-panel--soft { background: rgba(20, 30, 72, 0.62); }

.nx-card {
  background: var(--nx-cabin);
  border: 1px solid var(--nx-line);
  border-radius: var(--nx-r-lg);
  padding: clamp(18px, 2.2vw, 26px);
  transition: transform var(--nx-t) var(--nx-ease), border-color var(--nx-t) linear, background-color var(--nx-t) linear;
}
.nx-card:hover {
  transform: translateY(-3px);
  border-color: rgba(76, 240, 218, 0.42);
  background: var(--nx-cabin-2);
}

.nx-stat { display: grid; gap: 4px; }
.nx-stat__num {
  font-family: var(--nx-mono);
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1;
  color: var(--nx-cyan);
}
.nx-stat__label { font-size: 13px; color: var(--nx-mist); }

.nx-note {
  padding: 12px 16px 12px 18px;
  border-left: 3px solid var(--nx-gold);
  border-radius: 0 var(--nx-r-md) var(--nx-r-md) 0;
  background: rgba(255, 194, 77, 0.09);
  color: var(--nx-white);
  font-size: 14.5px;
}

/* ---------- 8. 奶油纸阅读区 ---------- */
.nx-cream {
  background: var(--nx-cream);
  color: var(--nx-brown);
  border-radius: var(--nx-r-lg);
  padding: clamp(22px, 3.2vw, 46px);
}
.nx-prose {
  max-width: 72ch;
  font-size: 17px;
  line-height: 1.9;
}
.nx-prose > * + * { margin-top: 1.05em; }
.nx-prose h2,
.nx-prose h3 { color: var(--nx-brown); margin-top: 1.6em; }
.nx-prose ul { list-style: disc; padding-left: 1.25em; }
.nx-prose ol { list-style: decimal; padding-left: 1.4em; }
.nx-prose li + li { margin-top: 0.4em; }
.nx-prose a { color: var(--nx-red); text-decoration: underline; text-underline-offset: 3px; }
.nx-prose blockquote {
  border-left: 3px solid var(--nx-orange);
  padding: 0.2em 0 0.2em 1em;
  color: #5C4A3D;
}

/* ---------- 9. 图片容器（页面阶段填入 img / picture） ---------- */
.nx-figure { margin: 0; display: grid; gap: 10px; }

.nx-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--nx-line);
  border-radius: var(--nx-r-lg);
  background:
    radial-gradient(120% 90% at 82% 8%, rgba(76, 240, 218, 0.22), transparent 58%),
    linear-gradient(135deg, #1B2757, #0B1230 58%, #141E48);
}
.nx-frame--wide { aspect-ratio: 21 / 9; }
.nx-frame--tall { aspect-ratio: 4 / 5; }
.nx-frame--square { aspect-ratio: 1 / 1; }
.nx-frame > img,
.nx-frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.nx-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(110% 80% at 85% 0%, rgba(76, 240, 218, 0.16), transparent 62%),
    linear-gradient(180deg, transparent 46%, rgba(11, 18, 48, 0.78));
  mix-blend-mode: screen;
}
.nx-figure__cap {
  font-family: var(--nx-mono);
  font-size: 12.5px;
  color: var(--nx-mist);
}
.nx-section--cream .nx-figure__cap { color: #6A5647; }

/* ---------- 10. 面包屑 ---------- */
.nx-crumbs { padding-block: 14px; }
.nx-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--nx-mono);
  font-size: 12px;
  color: var(--nx-mist);
}
.nx-crumbs__list a { color: var(--nx-mist); }
.nx-crumbs__list a:hover { color: var(--nx-cyan); }
.nx-crumbs__sep { color: rgba(143, 163, 204, 0.5); }
.nx-crumbs__list [aria-current="page"] { color: var(--nx-cyan); }

/* ---------- 11. 头部：紧凑命令栏 ---------- */
.nx-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: linear-gradient(180deg, rgba(11, 18, 48, 0.97), rgba(11, 18, 48, 0.88));
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--nx-line);
}

.nx-rail {
  background: rgba(33, 22, 16, 0.72);
  border-bottom: 1px solid rgba(143, 163, 204, 0.16);
  color: var(--nx-mist);
  font-size: 12.5px;
}
.nx-rail__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 18px;
  min-height: 34px;
  padding-block: 5px;
}
.nx-rail__status {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--nx-mono);
  letter-spacing: 0.01em;
}
.nx-rail__clock {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
}
.nx-rail__clocklabel { color: var(--nx-mist); }
.nx-countdown {
  color: var(--nx-orange);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.nx-bar__inner {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2vw, 26px);
  min-height: 64px;
  padding-block: 10px;
}

.nx-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: var(--nx-white);
}
.nx-brand--stack { align-items: flex-start; }
.nx-brand__mark {
  position: relative;
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--nx-cyan) 0%, #1B2757 56%, var(--nx-orange) 100%);
  box-shadow: inset 0 0 0 1px rgba(233, 240, 255, 0.28);
}
.nx-brand__mark::after {
  content: "";
  position: absolute;
  right: 6px;
  bottom: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--nx-midnight);
}
.nx-brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.nx-brand__name {
  font-family: var(--nx-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.03em;
}
.nx-brand__tag {
  font-style: normal;
  font-family: var(--nx-mono);
  font-size: 11px;
  color: var(--nx-mist);
}

.nx-nav { margin-left: auto; }
.nx-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nx-nav__item { display: block; }
.nx-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 13px;
  border-radius: var(--nx-r-pill);
  color: var(--nx-mist);
  font-size: 14.5px;
  line-height: 1.2;
  transition: color var(--nx-t) linear, background-color var(--nx-t) linear, box-shadow var(--nx-t) linear;
}
.nx-nav__link:hover { color: var(--nx-white); background: rgba(76, 240, 218, 0.1); }
.nx-nav__link[aria-current="page"] {
  background: var(--nx-cyan);
  color: var(--nx-midnight);
  font-weight: 700;
  box-shadow: 0 10px 22px -14px rgba(76, 240, 218, 0.9);
}
.nx-nav__no {
  font-family: var(--nx-mono);
  font-size: 11px;
  color: var(--nx-cyan);
}
.nx-nav__link[aria-current="page"] .nx-nav__no { color: rgba(11, 18, 48, 0.62); }
.nx-nav__txt { display: inline-block; }
.nx-nav__quick { display: none; }

.nx-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
}

.nx-burger {
  display: none;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border: 1px solid var(--nx-line-soft);
  border-radius: var(--nx-r-pill);
  background: rgba(20, 30, 72, 0.9);
  color: var(--nx-white);
  font-family: var(--nx-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  cursor: pointer;
}
.nx-burger__bars { display: grid; gap: 4px; width: 16px; }
.nx-burger__bars i {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--nx-cyan);
  transition: transform var(--nx-t) var(--nx-ease), opacity var(--nx-t) linear;
}
.nx-burger[aria-expanded="true"] .nx-burger__bars i:first-child { transform: translateY(3px) rotate(45deg); }
.nx-burger[aria-expanded="true"] .nx-burger__bars i:last-child { transform: translateY(-3px) rotate(-45deg); }
.nx-burger__label { line-height: 1; }

.nx-progress {
  position: relative;
  height: 2px;
  background: rgba(143, 163, 204, 0.16);
}
.nx-progress__bar {
  display: block;
  height: 100%;
  width: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--nx-cyan), var(--nx-gold) 55%, var(--nx-orange));
}

/* ---------- 12. 页脚 ---------- */
.nx-footer {
  position: relative;
  overflow: hidden;
  background: var(--nx-ink);
  color: var(--nx-white);
  border-top: 1px solid rgba(255, 106, 43, 0.4);
  padding-top: clamp(40px, 6vw, 76px);
}
.nx-footer__beam {
  position: absolute;
  left: -10%;
  right: -10%;
  top: -50px;
  height: 170px;
  transform: rotate(-3.2deg);
  background: linear-gradient(90deg, transparent, rgba(255, 106, 43, 0.28), rgba(76, 240, 218, 0.2), transparent);
  filter: blur(3px);
  pointer-events: none;
}
.nx-footer__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(240px, 1.1fr) minmax(0, 2fr) minmax(250px, 1.05fr);
  gap: clamp(26px, 4vw, 52px);
}
.nx-footer__brand { display: grid; align-content: start; gap: 14px; }
.nx-footer__slogan {
  font-family: var(--nx-display);
  font-weight: 800;
  font-size: clamp(19px, 2.2vw, 25px);
  line-height: 1.42;
  color: var(--nx-cream);
  letter-spacing: 0.01em;
}
.nx-footer__state {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--nx-mono);
  font-size: 12.5px;
  color: var(--nx-mist);
}

.nx-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(18px, 3vw, 30px);
}
.nx-footer__col { min-width: 0; }
.nx-footer__title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-family: var(--nx-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.03em;
  color: var(--nx-white);
}
.nx-footer__title .nx-mono { color: var(--nx-orange); font-size: 12px; }

.nx-footer__list { display: grid; gap: 9px; }
.nx-footer__list a {
  color: var(--nx-mist);
  font-size: 14.5px;
  transition: color var(--nx-t) linear, padding-left var(--nx-t) var(--nx-ease);
}
.nx-footer__list a:hover { color: var(--nx-cyan); padding-left: 4px; }

.nx-footer__list--meta li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  color: var(--nx-mist);
  font-size: 14px;
  line-height: 1.62;
}
.nx-footer__list--meta .nx-mono {
  color: var(--nx-gold);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.nx-footer__contact { min-width: 0; }

.nx-footer__legal {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  margin-top: clamp(30px, 4vw, 54px);
  padding-block: 18px 22px;
  border-top: 1px solid rgba(143, 163, 204, 0.18);
  font-family: var(--nx-mono);
  font-size: 12.5px;
  color: #A18F80;
}
.nx-footer__icp { margin: 0; }
.nx-footer__copy { margin: 0; }

/* ---------- 13. 回到顶部 ---------- */
.nx-top {
  position: fixed;
  right: clamp(14px, 3vw, 28px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 70;
  padding: 10px 16px;
  border: 1px solid rgba(76, 240, 218, 0.42);
  border-radius: var(--nx-r-pill);
  background: rgba(20, 30, 72, 0.95);
  color: var(--nx-cyan);
  font-family: var(--nx-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--nx-t) linear, transform var(--nx-t) var(--nx-ease), visibility var(--nx-t) linear;
}
.nx-top[data-visible="true"] { opacity: 1; visibility: visible; transform: none; }

/* ---------- 14. 滚动显现 ---------- */
html.nx-js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 480ms var(--nx-ease), transform 480ms var(--nx-ease);
}
html.nx-js [data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1180px) {
  .nx-quiet { display: none; }
  .nx-nav__link { padding: 8px 10px; font-size: 14px; }
}

@media (max-width: 1080px) {
  .nx-footer__inner { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .nx-footer__contact { grid-column: 1 / -1; }
}

@media (max-width: 980px) {
  .nx-burger { display: inline-flex; }

  .nx-actions .nx-btn--ghost { display: none; }

  .nx-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    margin: 0;
    display: block;
    background: var(--nx-cabin);
    border-top: 1px solid var(--nx-line);
    box-shadow: 0 34px 60px -32px rgba(0, 0, 0, 0.95);
    max-height: 0;
    overflow: hidden;
    visibility: hidden;
    opacity: 0;
    transition: max-height 300ms var(--nx-ease), opacity 200ms linear, visibility 200ms linear;
  }
  .nx-nav[data-open] {
    max-height: min(76vh, 640px);
    overflow-y: auto;
    visibility: visible;
    opacity: 1;
  }
  .nx-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 14px var(--nx-gutter) 6px;
  }
  .nx-nav__link {
    display: flex;
    justify-content: flex-start;
    gap: 10px;
    padding: 13px 14px;
    border-radius: 14px;
    font-size: 16px;
  }
  .nx-nav__link[aria-current="page"] {
    background: rgba(76, 240, 218, 0.12);
    color: var(--nx-cyan);
    box-shadow: inset 0 0 0 1px rgba(76, 240, 218, 0.45);
  }
  .nx-nav__link[aria-current="page"] .nx-nav__no { color: var(--nx-cyan); }
  .nx-nav__quick {
    display: grid;
    gap: 8px;
    padding: 8px var(--nx-gutter) 22px;
  }
  .nx-nav__quick-title {
    margin-bottom: 2px;
    font-family: var(--nx-mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--nx-mist);
  }
}

@media (max-width: 860px) {
  body { font-size: 16.5px; }
  .nx-footer__inner { grid-template-columns: minmax(0, 1fr); }
  .nx-footer__cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nx-footer__contact { grid-column: auto; }
}

@media (max-width: 640px) {
  .nx-actions { display: none; }
  .nx-rail__clocklabel { display: none; }
  .nx-rail__status { font-size: 11.5px; }
  .nx-bar__inner { min-height: 58px; gap: 10px; }
  .nx-brand__tag { display: none; }
  .nx-brand__name { font-size: 18px; }
}

@media (max-width: 520px) {
  .nx-footer__cols { grid-template-columns: minmax(0, 1fr); }
  .nx-head { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .nx-index__row { grid-template-columns: auto minmax(0, 1fr); }
  .nx-index__meta { grid-column: 2; }
}

/* ---------- 16. 无障碍：减少动态 ---------- */
@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;
  }
  html.nx-js [data-reveal] { opacity: 1; transform: none; }
  .nx-dot { animation: none; }
}