/* =========================================================
   乐鱼主站 · 共享样式 /assets/site.css
   深海墨蓝基底 + 荧光青锚点 + 珊瑚橙热度标记
   ========================================================= */

/* ---------- 1. 设计变量 ---------- */
:root {
  --ink: #071A2B;
  --water: #0C2A44;
  --water-mid: #123C5C;
  --foam: #E8F4F8;
  --mist: #8FB3C6;
  --cyan: #2FE3D0;
  --coral: #FF7A59;
  --electric: #7BD1FF;
  --amber: #F2C14E;
  --graphite: #1B1F24;

  --line: rgba(47, 227, 208, 0.16);
  --line-soft: rgba(143, 179, 198, 0.14);

  --font-head: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "JetBrains Mono", "Cascadia Mono", Consolas, "Liberation Mono", monospace;

  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-pill: 999px;

  --wrap-max: 1240px;
  --wrap-gutter: 24px;

  --header-h: 74px;
  --dock-h: 56px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-fast: 160ms;
  --dur: 240ms;
  --dur-slow: 420ms;
}

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

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

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

ul, ol { list-style: none; }

img, svg, video, canvas, picture { display: block; max-width: 100%; }

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

a { color: inherit; text-decoration: none; }

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

hr { border: 0; }

/* ---------- 3. 基础排版 ---------- */
body {
  min-height: 100vh;
  background-color: var(--ink);
  background-image:
    radial-gradient(120% 68% at 100% -8%, rgba(47, 227, 208, 0.075), transparent 62%),
    radial-gradient(96% 60% at -12% 108%, rgba(123, 209, 255, 0.06), transparent 64%),
    linear-gradient(180deg, #071A2B 0%, #061624 58%, #05121D 100%);
  background-attachment: fixed;
  color: var(--foam);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.012em;
  color: var(--foam);
}

h1 { font-size: clamp(38px, 6.2vw, 64px); font-weight: 900; }
h2 { font-size: clamp(28px, 4.2vw, 44px); }
h3 { font-size: clamp(22px, 2.6vw, 32px); }
h4 { font-size: 24px; font-weight: 700; }
h5 { font-size: 18px; font-weight: 700; }

p { line-height: 1.85; }

strong { font-weight: 700; color: var(--foam); }

::selection { background-color: rgba(47, 227, 208, 0.28); color: var(--foam); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

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

.content-wrap--narrow { max-width: 880px; }

.grid {
  display: grid;
  gap: var(--wrap-gutter);
}

.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.stack > * + * { margin-top: 18px; }

/* ---------- 5. 跳转链接 ---------- */
.skip-link {
  position: absolute;
  left: 16px;
  top: 16px;
  z-index: 300;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  background-color: var(--cyan);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  transform: translateY(-220%);
  transition: transform var(--dur) var(--ease);
}

.skip-link:focus-visible {
  transform: translateY(0);
  outline: 2px solid var(--foam);
  outline-offset: 3px;
}

/* ---------- 6. 页头 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background-color: rgba(7, 26, 43, 0.93);
  border-bottom: 1px solid rgba(47, 227, 208, 0.14);
  transform: translateY(-110%);
  opacity: 0;
  pointer-events: none;
  transition:
    transform var(--dur-slow) var(--ease),
    opacity var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.site-header[data-visible] {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
  box-shadow: 0 18px 40px -28px rgba(0, 0, 0, 0.9);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 22px;
  min-height: var(--header-h);
  padding-block: 12px;
  transition: min-height var(--dur) var(--ease), padding var(--dur) var(--ease);
}

.site-header[data-visible] .header-inner {
  min-height: 66px;
  padding-block: 8px;
}

.header-progress {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  background-image: linear-gradient(90deg, var(--cyan), var(--electric) 70%, var(--coral));
  will-change: transform;
}

/* 品牌块 */
.brand-block {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex: 0 0 auto;
  transition: opacity var(--dur) var(--ease);
}

.brand-block:hover { opacity: 0.92; }

.brand-mark {
  position: relative;
  display: inline-block;
  padding-left: 15px;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.03em;
  color: var(--foam);
  white-space: nowrap;
}

.brand-mark::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 22px;
  border-radius: var(--radius-pill);
  background-image: linear-gradient(180deg, var(--cyan), var(--electric));
  transform: translateY(-50%) skewY(-12deg);
}

.brand-tagline {
  font-size: 12px;
  line-height: 1;
  letter-spacing: 0.14em;
  color: var(--mist);
  white-space: nowrap;
}

/* 主导航 */
.nav-primary { margin-left: auto; }

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

.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 13px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--mist);
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--foam);
  background-color: rgba(18, 60, 92, 0.45);
}

.nav-link:hover::after,
.nav-link:focus-visible::after { transform: scaleX(1); }

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

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
  box-shadow: 0 0 12px rgba(47, 227, 208, 0.55);
}

/* 页头双入口 */
.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.pill-cta {
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding-inline: 18px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.pill-cta--cyan {
  background-color: var(--cyan);
  color: var(--ink);
}

.pill-cta--cyan:hover,
.pill-cta--cyan:focus-visible {
  background-color: var(--electric);
  box-shadow: 0 0 0 5px rgba(47, 227, 208, 0.16);
}

.pill-cta--coral {
  background-color: transparent;
  color: var(--coral);
  box-shadow: inset 0 0 0 1px rgba(255, 122, 89, 0.55);
}

.pill-cta--coral:hover,
.pill-cta--coral:focus-visible {
  background-color: rgba(255, 122, 89, 0.14);
  box-shadow: inset 0 0 0 1px var(--coral), 0 0 0 5px rgba(255, 122, 89, 0.1);
}

/* 页头汉堡 */
.nav-toggle {
  display: none;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background-color: rgba(18, 60, 92, 0.6);
  transition: background-color var(--dur) var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible { background-color: rgba(18, 60, 92, 0.95); }

.nav-toggle__bars {
  position: relative;
  display: block;
  width: 18px;
  height: 14px;
}

.nav-toggle__bars i {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 2px;
  background-color: var(--foam);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.nav-toggle__bars i:nth-child(1) { top: 0; }
.nav-toggle__bars i:nth-child(2) { top: 6px; }
.nav-toggle__bars i:nth-child(3) { top: 12px; }

.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars i:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- 7. 移动端底部悬浮胶囊 ---------- */
.mobile-dock {
  position: fixed;
  left: 50%;
  bottom: max(14px, env(safe-area-inset-bottom));
  z-index: 88;
  display: none;
  align-items: center;
  gap: 6px;
  height: var(--dock-h);
  padding: 6px;
  border-radius: var(--radius-pill);
  background-color: rgba(9, 32, 52, 0.94);
  border: 1px solid rgba(47, 227, 208, 0.2);
  box-shadow: 0 20px 46px -22px rgba(0, 0, 0, 0.9);
  transform: translateX(-50%);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.mobile-dock[data-hidden] {
  transform: translateX(-50%) translateY(calc(100% + 32px));
  opacity: 0;
  pointer-events: none;
}

.mobile-dock__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  padding-inline: 14px;
  border-radius: var(--radius-pill);
  background-color: rgba(18, 60, 92, 0.75);
  color: var(--foam);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  transition: background-color var(--dur) var(--ease);
}

.mobile-dock__btn:hover,
.mobile-dock__btn:focus-visible { background-color: rgba(18, 60, 92, 1); }

.mobile-dock__icon {
  position: relative;
  display: block;
  width: 16px;
  height: 12px;
  flex: 0 0 auto;
}

.mobile-dock__icon i {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 2px;
  background-color: var(--cyan);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.mobile-dock__icon i:nth-child(1) { top: 0; }
.mobile-dock__icon i:nth-child(2) { top: 5px; }
.mobile-dock__icon i:nth-child(3) { top: 10px; }

.mobile-dock__btn[aria-expanded="true"] .mobile-dock__icon i:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}
.mobile-dock__btn[aria-expanded="true"] .mobile-dock__icon i:nth-child(2) {
  opacity: 0;
}
.mobile-dock__btn[aria-expanded="true"] .mobile-dock__icon i:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.mobile-dock__link {
  display: inline-flex;
  align-items: center;
  height: 44px;
  padding-inline: 15px;
  border-radius: var(--radius-pill);
  background-color: var(--cyan);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: background-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.mobile-dock__link:hover,
.mobile-dock__link:focus-visible {
  background-color: var(--electric);
}

.mobile-dock__link--warm {
  background-color: transparent;
  color: var(--coral);
  box-shadow: inset 0 0 0 1px rgba(255, 122, 89, 0.6);
}

.mobile-dock__link--warm:hover,
.mobile-dock__link--warm:focus-visible {
  background-color: rgba(255, 122, 89, 0.16);
}

/* ---------- 8. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: 96px;
  padding-block: 68px 34px;
  background-color: var(--water);
  background-image: linear-gradient(180deg, #0C2A44 0%, #081F33 100%);
  border-top: 1px solid var(--line);
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background-image: linear-gradient(90deg, transparent, var(--cyan) 42%, var(--electric) 68%, transparent);
  opacity: 0.55;
}

.site-footer::after {
  content: "";
  position: absolute;
  left: -14%;
  bottom: -68%;
  width: 62%;
  height: 120%;
  border-radius: 50%;
  background-image: radial-gradient(circle, rgba(47, 227, 208, 0.13), transparent 66%);
  pointer-events: none;
}

.footer-inner { position: relative; z-index: 1; }

.footer-top {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(0, 2.1fr);
  gap: 52px;
}

.footer-brand__mark {
  display: block;
  font-family: var(--font-head);
  font-size: 26px;
  font-weight: 900;
  letter-spacing: 0.03em;
  color: var(--foam);
}

.footer-brand__line {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--foam);
  opacity: 0.86;
}

.footer-brand__meta {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  letter-spacing: 0.03em;
  color: var(--mist);
  max-width: 30ch;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
}

.footer-col__title {
  margin-bottom: 16px;
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.footer-list li + li { margin-top: 11px; }

.footer-list a {
  font-size: 14px;
  color: var(--mist);
  transition: color var(--dur) var(--ease);
}

.footer-list a:hover,
.footer-list a:focus-visible { color: var(--foam); }

.footer-list--contact li {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.footer-label {
  flex: 0 0 auto;
  padding: 1px 8px;
  border-radius: var(--radius-pill);
  background-color: rgba(47, 227, 208, 0.1);
  color: var(--cyan);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.7;
}

.footer-value {
  flex: 1 1 12ch;
  min-width: 0;
  word-break: break-word;
}

.footer-num {
  flex: 1 1 auto;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--amber);
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 52px;
  padding-top: 24px;
  border-top: 1px solid var(--line-soft);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}

.footer-legal a {
  font-size: 13px;
  color: var(--mist);
  transition: color var(--dur) var(--ease);
}

.footer-legal a:hover,
.footer-legal a:focus-visible { color: var(--cyan); }

.footer-stamp {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.footer-stamp__icp { font-family: var(--font-mono); }
.footer-stamp__copy { white-space: nowrap; }

/* ---------- 9. 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding-inline: 28px;
  border-radius: var(--radius-pill);
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

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

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--electric);
  box-shadow: 0 0 0 6px rgba(47, 227, 208, 0.16);
}

.btn--ghost {
  background-color: transparent;
  color: var(--foam);
  box-shadow: inset 0 0 0 1.5px rgba(143, 179, 198, 0.42);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  color: var(--cyan);
  box-shadow: inset 0 0 0 1.5px var(--cyan), 0 0 0 6px rgba(47, 227, 208, 0.1);
}

.btn--warm {
  background-color: var(--coral);
  color: var(--ink);
}

.btn--warm:hover,
.btn--warm:focus-visible {
  box-shadow: 0 0 0 6px rgba(255, 122, 89, 0.18);
}

/* ---------- 10. 索引与叙事构件 ---------- */
.link-underline {
  position: relative;
  display: inline-block;
}

.link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 1px;
  background-color: currentColor;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease);
}

.link-underline:hover::after,
.link-underline:focus-visible::after { transform: scaleX(1); }

.section-band {
  height: 3px;
  border-radius: var(--radius-pill);
  background-image: linear-gradient(90deg, var(--cyan), rgba(47, 227, 208, 0) 72%);
  opacity: 0.42;
}

.section-band--warm {
  background-image: linear-gradient(90deg, var(--coral), rgba(255, 122, 89, 0) 72%);
}

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.num--amber { color: var(--amber); }
.num--cyan { color: var(--cyan); }
.num--warm { color: var(--coral); }

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 26px;
  padding-inline: 12px;
  border-radius: var(--radius-pill);
  background-color: rgba(18, 60, 92, 0.82);
  color: var(--mist);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.chip--cyan {
  background-color: rgba(47, 227, 208, 0.16);
  color: var(--cyan);
}

.chip--coral {
  background-color: rgba(255, 122, 89, 0.18);
  color: var(--coral);
}

.prose {
  max-width: 34em;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(232, 244, 248, 0.86);
}

.prose p + p { margin-top: 1.15em; }

.prose a {
  color: var(--electric);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.prose a:hover,
.prose a:focus-visible { color: var(--cyan); }

/* ---------- 11. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.breadcrumb li + li::before {
  content: "/";
  color: rgba(143, 179, 198, 0.45);
}

.breadcrumb a { color: var(--mist); transition: color var(--dur) var(--ease); }
.breadcrumb a:hover,
.breadcrumb a:focus-visible { color: var(--cyan); }

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

/* ---------- 12. 图片容器基础 ---------- */
.figure-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  border-radius: var(--radius-xl);
  background-color: var(--water);
  background-image: linear-gradient(135deg, #123C5C 0%, #071A2B 100%);
  border: 1px solid var(--line-soft);
  aspect-ratio: 16 / 9;
}

.figure-frame > img,
.figure-frame > video,
.figure-frame > picture > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.figure-frame--scrim::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(180deg, rgba(7, 26, 43, 0) 46%, rgba(7, 26, 43, 0.78) 100%);
  pointer-events: none;
}

/* ---------- 13. 显现动效基础 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 520ms var(--ease), transform 520ms var(--ease);
}

[data-reveal][data-revealed] {
  opacity: 1;
  transform: none;
}

/* ---------- 14. 响应式 ---------- */
@media (max-width: 1100px) {
  .brand-tagline { display: none; }
  .footer-top { grid-template-columns: minmax(0, 1fr); gap: 44px; }
}

@media (max-width: 900px) {
  :root {
    --wrap-gutter: 20px;
    --header-h: 66px;
  }

  /* 移动端页头常驻，首屏半透明，滚动后变实底 */
  .site-header {
    transform: none;
    opacity: 1;
    pointer-events: auto;
    background-color: rgba(7, 26, 43, 0.72);
    border-bottom-color: transparent;
    box-shadow: none;
  }

  .site-header[data-visible] {
    background-color: rgba(7, 26, 43, 0.97);
    border-bottom-color: var(--line);
  }

  .header-actions { display: none; }
  .nav-toggle { display: inline-flex; }

  .header-inner { gap: 12px; }

  /* 全屏层叠导航 */
  .nav-primary {
    position: fixed;
    inset: 0;
    margin-left: 0;
    z-index: 150;
    background-color: rgba(7, 26, 43, 0.98);
    background-image: radial-gradient(80% 60% at 100% 0%, rgba(47, 227, 208, 0.09), transparent 62%);
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition:
      opacity var(--dur) var(--ease),
      transform var(--dur) var(--ease),
      visibility 0s linear var(--dur);
  }

  .nav-primary[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition-delay: 0s;
  }

  .nav-list {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    width: min(340px, 86vw);
    margin: 0 auto;
    padding: 104px 0 72px;
  }

  .nav-link {
    display: block;
    padding: 14px 20px;
    border: 1px solid var(--line-soft);
    border-radius: var(--radius-md);
    font-size: 22px;
    font-weight: 700;
    text-align: left;
  }

  .nav-link::after { display: none; }

  .nav-link[aria-current="page"] {
    border-color: var(--cyan);
    background-color: rgba(47, 227, 208, 0.12);
    color: var(--cyan);
  }

  .mobile-dock { display: flex; }

  .grid--2,
  .grid--3 { grid-template-columns: minmax(0, 1fr); }

  .site-footer { margin-top: 72px; padding-block: 56px 110px; }

  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }

  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 14px; }
}

@media (max-width: 560px) {
  :root { --wrap-gutter: 16px; }

  .brand-mark { font-size: 20px; padding-left: 13px; }
  .brand-mark::before { height: 20px; width: 5px; }

  .mobile-dock__link,
  .mobile-dock__btn { padding-inline: 12px; font-size: 13px; }

  .footer-grid { grid-template-columns: minmax(0, 1fr); }

  .footer-stamp { flex-direction: column; align-items: flex-start; gap: 6px; }

  .prose { font-size: 16px; }
}

/* ---------- 15. 减弱动效 ---------- */
@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;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .site-header {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }
}