/* =========================================================
   完美平台主站 · 共享样式 /assets/site.css
   深夜看台 · 数据流 · 堆叠面板
   ========================================================= */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 104px;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--ink-900);
  background-image:
    linear-gradient(to right, rgba(31, 62, 52, .24) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31, 62, 52, .24) 1px, transparent 1px);
  background-size: 76px 76px;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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;
  padding: 0;
  cursor: pointer;
}

a {
  color: var(--mint);
  text-decoration: none;
}

ul, ol { margin: 0; padding: 0; list-style: none; }

h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd { margin: 0; }

hr { border: 0; }

:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 2px;
}

/* ---------- 2. 变量 ---------- */
:root {
  --ink-900: #06110D;
  --ink-800: #0B1F19;
  --ink-700: #123128;
  --rail: #1F3E34;
  --mint: #2BF0C4;
  --mint-soft: #A8FFE6;
  --amber: #FFB03A;
  --amber-deep: #C97A16;
  --paper: #E8F3EE;
  --muted: #8FA9A0;
  --alert: #FF7A5C;

  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-display: "Source Han Sans SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --r-lg: 28px;
  --r-md: 20px;
  --r-sm: 12px;
  --r-pill: 999px;

  --shell: 1400px;
  --gutter: clamp(18px, 4.2vw, 56px);
  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------- 3. 排版 ---------- */
.display {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 7vw, 5.375rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--paper);
}

.display--mint { color: var(--mint); }

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.6vw, 2.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -.015em;
  color: var(--paper);
}

.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mint);
}

.numeric {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -.02em;
}

.annotation {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--muted);
  text-transform: uppercase;
}

.annotation--vertical {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: .22em;
}

.prose {
  max-width: 38em;
  font-size: 17px;
  line-height: 1.75;
  color: #C7D9D2;
}

.prose > * + * { margin-top: 1.1em; }

.prose h2 {
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--paper);
}

.prose h3 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
}

.prose strong { color: var(--paper); }

.prose a {
  color: var(--mint);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.prose ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.prose li {
  position: relative;
  padding-left: 20px;
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mint);
}

.prose code {
  font-family: var(--font-mono);
  font-size: .9em;
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--ink-700);
  color: var(--mint-soft);
}

/* ---------- 4. 布局辅助 ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.shell--narrow { max-width: 880px; }

.stack { display: flex; flex-direction: column; }
.stack--sm { gap: 10px; }
.stack--md { gap: 18px; }
.stack--lg { gap: clamp(24px, 3.6vw, 48px); }

.grid {
  display: grid;
  gap: clamp(16px, 2.2vw, 26px);
}

.grid--2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 230px), 1fr)); }
.grid--4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 180px), 1fr)); }

.rule {
  height: 1px;
  background: var(--rail);
}

.rule--mint {
  height: 2px;
  background: linear-gradient(90deg, var(--mint), rgba(43, 240, 196, 0));
}

/* ---------- 5. 面板 ---------- */
.panel {
  position: relative;
  background: var(--ink-800);
  border: 1px solid var(--rail);
  border-radius: var(--r-lg);
  padding: clamp(22px, 3.4vw, 40px);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), background-color 180ms var(--ease);
}

.panel--lift:hover {
  transform: translateY(-4px);
  border-color: rgba(43, 240, 196, .55);
  background-color: var(--ink-700);
}

.panel--flat { background: transparent; }

.panel--rail {
  border-left: 2px solid var(--mint);
  border-radius: 0 var(--r-lg) var(--r-lg) 0;
}

/* ---------- 6. 按钮与标签 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 24px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 180ms var(--ease), background-color 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease);
}

.btn--primary {
  background: var(--mint);
  color: var(--ink-900);
}

.btn--primary:hover { background: var(--mint-soft); transform: translateY(-2px); }

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

.btn--ghost:hover {
  border-color: var(--mint);
  color: var(--mint);
  transform: translateY(-2px);
}

.btn--amber {
  background: var(--amber);
  color: #1A0F02;
}

.btn--amber:hover { background: #FFC566; transform: translateY(-2px); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 13px;
  border-radius: var(--r-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mint-soft);
  background: rgba(43, 240, 196, .09);
  border: 1px solid rgba(43, 240, 196, .22);
}

.tag--amber {
  color: #FFD79A;
  background: rgba(255, 176, 58, .1);
  border-color: rgba(255, 176, 58, .3);
}

.tag--muted {
  color: var(--muted);
  background: transparent;
  border-color: var(--rail);
}

/* ---------- 7. 面包屑 ---------- */
.breadcrumb {
  margin-bottom: 18px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

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

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

.breadcrumb li + li::before {
  content: "/";
  color: var(--rail);
}

.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--mint); }
.breadcrumb [aria-current="page"] { color: var(--mint); }

/* ---------- 8. 图片容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: var(--r-lg);
  border: 1px solid var(--rail);
  background: var(--ink-800);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(31, 62, 52, .55) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31, 62, 52, .55) 1px, transparent 1px);
  background-size: 34px 34px;
}

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

.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 4 / 5; }

/* ---------- 9. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--ink-900);
  border-bottom: 1px solid var(--rail);
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -90px;
  z-index: 200;
  padding: 12px 22px;
  border-radius: var(--r-pill);
  background: var(--mint);
  color: var(--ink-900);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  transition: top 180ms var(--ease);
}

.skip-link:focus { top: 14px; }

.header-shell {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: var(--shell);
  height: 76px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.brand-rail {
  display: flex;
  align-items: center;
  gap: 18px;
  min-width: 0;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--paper);
}

.brand-pulse {
  position: relative;
  flex: none;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 5px rgba(43, 240, 196, .13);
}

.brand-pulse::after {
  content: "";
  position: absolute;
  inset: -7px;
  border-radius: 50%;
  border: 1px solid rgba(43, 240, 196, .38);
  animation: brandRing 2.8s var(--ease) infinite;
}

@keyframes brandRing {
  0% { transform: scale(.72); opacity: .9; }
  70% { transform: scale(1.28); opacity: 0; }
  100% { transform: scale(1.28); opacity: 0; }
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .01em;
}

.brand-domain {
  margin-top: 5px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  text-transform: lowercase;
  color: var(--muted);
}

.brand-season {
  display: flex;
  align-items: center;
  gap: 9px;
  padding-left: 18px;
  border-left: 1px solid var(--rail);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
  white-space: nowrap;
}

.brand-season-key {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .18em;
  color: var(--mint);
}

/* 导航 */
.primary-nav { display: flex; align-items: center; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-item {
  position: relative;
  display: flex;
}

.nav-link {
  display: block;
  padding: 9px 15px;
  border-radius: var(--r-pill);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--muted);
  transition: color 180ms var(--ease), background-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.nav-link:hover {
  color: var(--mint-soft);
  background: var(--ink-800);
}

.nav-link[aria-current="page"] {
  color: var(--mint);
  background: rgba(43, 240, 196, .1);
  box-shadow: inset 0 0 0 1px rgba(43, 240, 196, .45);
}

.nav-link[aria-current="page"]:hover {
  color: var(--mint-soft);
}

.nav-tags {
  position: absolute;
  top: 100%;
  left: 50%;
  z-index: 5;
  display: flex;
  gap: 6px;
  margin-top: 8px;
  padding: 7px 10px;
  border-radius: var(--r-pill);
  background: var(--ink-800);
  border: 1px solid var(--rail);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, -6px);
  transition: opacity 180ms var(--ease), transform 180ms var(--ease), visibility 180ms linear;
}

.nav-tags::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -8px;
  height: 8px;
}

.nav-item:hover .nav-tags,
.nav-item:focus-within .nav-tags {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.nav-item:last-child .nav-tags {
  left: auto;
  right: 0;
  transform: translateY(-6px);
}

.nav-item:last-child:hover .nav-tags,
.nav-item:last-child:focus-within .nav-tags {
  transform: translateY(0);
}

.nav-tag {
  padding: 3px 9px;
  border-radius: var(--r-pill);
  background: rgba(43, 240, 196, .1);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--mint-soft);
}

/* 移动导航按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--rail);
  background: var(--ink-800);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: .12em;
  transition: border-color 180ms var(--ease), color 180ms var(--ease);
}

.nav-toggle:hover {
  border-color: var(--mint);
  color: var(--mint-soft);
}

.nav-toggle-bars {
  position: relative;
  flex: none;
  width: 16px;
  height: 10px;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 1.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 200ms var(--ease), top 200ms var(--ease);
}

.nav-toggle-bars::before { top: 0; }
.nav-toggle-bars::after { top: 8px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before {
  top: 4px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after {
  top: 4px;
  transform: rotate(-45deg);
}

.nav-toggle-text { line-height: 1; }

/* 移动端底部胶囊 */
.mobile-dock { display: none; }

/* ---------- 10. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(64px, 10vw, 140px);
  background: linear-gradient(180deg, var(--ink-900) 0%, #040C09 72%);
  border-top: 1px solid var(--rail);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(43, 240, 196, 0), rgba(43, 240, 196, .7), rgba(43, 240, 196, 0));
}

.footer-shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 72px) var(--gutter) 28px;
}

.footer-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--rail);
}

.footer-brand {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 14px;
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--paper);
}

.footer-brand-note {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}

.footer-stamp {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--muted);
}

.footer-stamp-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 4px rgba(43, 240, 196, .14);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-bottom: 1px solid var(--rail);
}

.footer-col {
  padding: 28px 26px 34px;
  border-right: 1px solid var(--rail);
}

.footer-col:first-child { padding-left: 0; }

.footer-col:last-child {
  border-right: 0;
  padding-right: 0;
}

.footer-col-head {
  margin-bottom: 16px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--mint);
}

.footer-col-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  color: inherit;
  text-align: left;
  cursor: default;
}

.footer-col-label { line-height: 1.5; }

.footer-col-glyph {
  position: relative;
  display: none;
  flex: none;
  width: 12px;
  height: 12px;
}

.footer-col-glyph::before,
.footer-col-glyph::after {
  content: "";
  position: absolute;
  background: var(--mint);
  border-radius: 2px;
  transition: transform 200ms var(--ease);
}

.footer-col-glyph::before {
  left: 0;
  right: 0;
  top: 5.25px;
  height: 1.5px;
}

.footer-col-glyph::after {
  top: 0;
  bottom: 0;
  left: 5.25px;
  width: 1.5px;
}

.footer-col-toggle[aria-expanded="true"] .footer-col-glyph::after {
  transform: scaleY(0);
}

.footer-col-body[hidden] { display: none; }

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  color: var(--muted);
  transition: color 180ms var(--ease), transform 180ms var(--ease);
}

.footer-link::before {
  content: "";
  flex: none;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--rail);
  transition: background-color 180ms var(--ease);
}

.footer-link:hover {
  color: var(--mint-soft);
  transform: translateX(3px);
}

.footer-link:hover::before { background: var(--mint); }

.footer-link--legacy {
  padding: 8px 14px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(255, 176, 58, .45);
  background: rgba(255, 176, 58, .07);
  color: var(--amber);
}

.footer-link--legacy::before { background: var(--amber); }

.footer-link--legacy:hover {
  color: #FFD79A;
  border-color: var(--amber);
  transform: translateX(3px);
}

.footer-contact { gap: 12px; }

.footer-contact-line {
  position: relative;
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-contact-label {
  flex: none;
  padding-top: 2px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--muted);
}

.footer-contact-text {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-all;
}

.copy-btn {
  padding: 3px 10px;
  border-radius: var(--r-pill);
  border: 1px solid var(--rail);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.copy-btn:hover {
  color: var(--mint);
  border-color: var(--mint);
}

.copy-toast {
  position: absolute;
  right: 0;
  top: 100%;
  margin-top: 7px;
  padding: 4px 11px;
  border-radius: var(--r-pill);
  background: var(--mint);
  color: var(--ink-900);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 160ms var(--ease), transform 160ms var(--ease), visibility 160ms linear;
}

.copy-toast[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.footer-list--meta { gap: 9px; }

.footer-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.footer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  padding-top: 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--muted);
}

.footer-copy { color: var(--muted); }
.footer-node { color: #6E8A80; }

/* ---------- 11. JS 注入与显现 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 90;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--mint), var(--amber));
  pointer-events: none;
}

.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 420ms var(--ease), transform 420ms var(--ease);
}

.js-ready [data-reveal-visible] {
  opacity: 1;
  transform: none;
}

/* ---------- 12. 响应式 ---------- */
@media (max-width: 1280px) {
  .brand-season { display: none; }
}

@media (max-width: 1080px) {
  .nav-link { padding: 9px 12px; font-size: 13px; }
}

@media (max-width: 980px) {
  .header-shell { height: 68px; }

  .nav-toggle { display: inline-flex; }

  .primary-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    max-height: calc(100vh - 68px);
    overflow-y: auto;
    padding: 14px var(--gutter) 22px;
    background: var(--ink-800);
    border-top: 1px solid var(--rail);
    border-bottom: 1px solid var(--rail);
  }

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

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 3px;
  }

  .nav-item { display: block; }

  .nav-link {
    padding: 15px 18px;
    border-radius: var(--r-md);
    font-size: 16px;
    letter-spacing: .05em;
  }

  .nav-tags { display: none; }
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr;
    border-bottom: 1px solid var(--rail);
  }

  .footer-col {
    padding: 0;
    border-right: 0;
    border-bottom: 1px solid var(--rail);
  }

  .footer-col:last-child { border-bottom: 0; }

  .footer-col-head { margin-bottom: 0; }

  .footer-col-toggle {
    padding: 18px 0;
    cursor: pointer;
  }

  .footer-col-glyph { display: block; }

  .footer-col-body { padding-bottom: 20px; }

  .footer-head { align-items: flex-start; }
}

@media (max-width: 720px) {
  body {
    font-size: 16px;
    background-size: 48px 48px;
    padding-bottom: 84px;
  }

  .brand-name { font-size: 18px; }
  .brand-domain { font-size: 9px; letter-spacing: .12em; }
  .brand-pulse { width: 11px; height: 11px; }

  .display { font-size: clamp(2.1rem, 10vw, 3.4rem); }

  .panel { border-radius: var(--r-md); }

  .mobile-dock {
    display: flex;
    position: fixed;
    left: 12px;
    right: 12px;
    bottom: 12px;
    z-index: 70;
    align-items: center;
    justify-content: space-between;
    gap: 2px;
    padding: 7px;
    border-radius: var(--r-pill);
    background: var(--ink-800);
    border: 1px solid var(--rail);
    box-shadow: 0 14px 34px rgba(0, 0, 0, .55);
  }

  .mobile-dock a {
    flex: 1 1 0;
    padding: 10px 4px;
    border-radius: var(--r-pill);
    text-align: center;
    font-size: 12px;
    letter-spacing: .04em;
    color: var(--muted);
    transition: color 180ms var(--ease), background-color 180ms var(--ease);
  }

  .mobile-dock a[aria-current="page"] {
    color: var(--ink-900);
    background: var(--mint);
    font-weight: 700;
  }

  .footer-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- 13. 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .brand-pulse::after {
    animation: none;
    opacity: 0;
  }

  .nav-item:hover .nav-tags,
  .nav-item:focus-within .nav-tags { transform: translate(-50%, 0); }

  .nav-item:last-child:hover .nav-tags,
  .nav-item:last-child:focus-within .nav-tags { transform: translateY(0); }

  .panel--lift:hover,
  .btn:hover,
  .footer-link:hover { transform: none; }

  .js-ready [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .scroll-progress { transition: none; }
}