/* ============================================================
   博鱼品牌站 · 共享站点样式 /assets/site.css
   水下桌面档案：侧边轨道 + 暖沙阅读区 + 蓝图刻度
   ============================================================ */

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  background: #041019;
}

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

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

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

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

a { color: inherit; }

main { display: block; }

#main-content { display: block; }

/* ---------- tokens ---------- */
:root {
  --abyss-950: #041019;
  --abyss-800: #0A2239;
  --sand-100: #F3EBDD;
  --fog-200: #DCE7E8;
  --coral-500: #FF6A45;
  --cyan-400: #2ED9CE;
  --tide-600: #176B87;
  --ink-950: #101417;
  --white-050: #FCFCF8;

  --rail-w: 236px;
  --rail-pad: 24px;
  --mast-h: 62px;
  --maxw: 1180px;
  --gutter: clamp(18px, 4vw, 56px);
  --gap: clamp(16px, 2.2vw, 28px);

  --hair: rgba(220, 231, 232, 0.18);
  --hair-soft: rgba(220, 231, 232, 0.09);
  --hair-dark: rgba(16, 20, 23, 0.14);

  --font-display: "Archivo", "Barlow Condensed", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", "Noto Sans Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --shadow-brut: 6px 6px 0 0 var(--ink-950);
  --shadow-brut-cyan: 6px 6px 0 0 var(--cyan-400);
  --ease: cubic-bezier(0.32, 0.86, 0.36, 1);
}

/* ---------- base / 中文排版 ---------- */
body {
  min-height: 100vh;
  padding-left: var(--rail-w);
  background: var(--sand-100);
  color: var(--ink-950);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.85;
  letter-spacing: 0.012em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 200;
  line-height: 1.06;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1 { font-size: clamp(40px, 7.4vw, 120px); }
h2 { font-size: clamp(28px, 4.4vw, 62px); }
h3 { font-size: clamp(20px, 2.2vw, 30px); font-weight: 800; letter-spacing: -0.01em; }
h4 { font-size: clamp(17px, 1.6vw, 21px); font-weight: 700; letter-spacing: 0; }

p { max-width: 68ch; text-wrap: pretty; }

strong, b { font-weight: 700; }

::selection {
  background: var(--coral-500);
  color: var(--abyss-950);
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 3px solid var(--cyan-400);
  outline-offset: 3px;
  border-radius: 1px;
}

/* ---------- 布局容器 ---------- */
.shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}

/* ---------- 索引与装饰 ---------- */
.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--tide-600);
}

.section-no {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 60px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--coral-500);
}

.rule {
  height: 2px;
  border: 0;
  background: var(--ink-950);
}

.lamp {
  display: inline-block;
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--cyan-400);
  box-shadow: 0 0 0 3px rgba(46, 217, 206, 0.18);
}

@media (prefers-reduced-motion: no-preference) {
  .lamp { animation: lampPulse 3.4s var(--ease) infinite; }
}

@keyframes lampPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.42; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 22px;
  border: 2px solid var(--ink-950);
  background: var(--white-050);
  color: var(--ink-950);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 4px 4px 0 0 var(--ink-950);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), background 0.18s var(--ease);
}

.btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 0 var(--ink-950);
}

.btn:active {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 0 var(--ink-950);
}

.btn--coral {
  background: var(--coral-500);
  color: var(--abyss-950);
  border-color: var(--abyss-950);
  box-shadow: 4px 4px 0 0 rgba(46, 217, 206, 0.9);
}

.btn--coral:hover { box-shadow: 6px 6px 0 0 var(--cyan-400); }

.btn--ghost {
  background: transparent;
  color: var(--ink-950);
}

.btn--rail {
  width: 100%;
  padding: 10px 14px;
  font-size: 13.5px;
  letter-spacing: 0.08em;
  background: var(--coral-500);
  color: var(--abyss-950);
  border: 2px solid var(--abyss-950);
  box-shadow: 4px 4px 0 0 var(--cyan-400);
}

.btn--rail:hover { box-shadow: 5px 5px 0 0 var(--cyan-400); }

/* ---------- 面板 / 标签 ---------- */
.panel {
  position: relative;
  background: var(--white-050);
  border: 2px solid var(--ink-950);
  box-shadow: var(--shadow-brut);
  padding: clamp(18px, 2.6vw, 32px);
}

.panel--dark {
  background: var(--abyss-800);
  color: var(--sand-100);
  border-color: var(--abyss-950);
  box-shadow: 6px 6px 0 0 rgba(4, 16, 25, 0.55);
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid var(--ink-950);
  background: var(--fog-200);
  color: var(--ink-950);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  line-height: 1.5;
}

.chip--live {
  background: var(--cyan-400);
  border-color: var(--abyss-950);
  color: var(--abyss-950);
}

.chip--hot {
  background: var(--coral-500);
  border-color: var(--abyss-950);
  color: var(--abyss-950);
}

/* ---------- 面包屑 ---------- */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--tide-600);
}

.crumbs a {
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.crumbs a:hover {
  color: var(--coral-500);
  border-bottom-color: var(--coral-500);
}

.crumbs__sep { opacity: 0.45; }

.crumbs [aria-current="page"] { color: var(--ink-950); }

/* ---------- 图片容器基础规则（页面阶段放图） ---------- */
.media-frame {
  position: relative;
  display: block;
  width: 100%;
  overflow: hidden;
  isolation: isolate;
  aspect-ratio: 16 / 10;
  background:
    radial-gradient(120% 90% at 74% 16%, rgba(46, 217, 206, 0.22), transparent 58%),
    linear-gradient(150deg, var(--abyss-800), var(--abyss-950));
  border: 2px solid var(--ink-950);
  box-shadow: var(--shadow-brut);
}

.media-frame--square { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-frame--wide { aspect-ratio: 21 / 9; }

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

.media-frame__veil {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 72% 22%, rgba(46, 217, 206, 0.2), transparent 56%),
    linear-gradient(165deg, rgba(10, 34, 57, 0.52), rgba(4, 16, 25, 0.04) 62%);
}

.media-frame__tag {
  position: absolute;
  left: 10px;
  bottom: 10px;
  padding: 3px 8px;
  background: rgba(4, 16, 25, 0.74);
  border: 1px solid rgba(220, 231, 232, 0.26);
  color: var(--sand-100);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  line-height: 1.5;
}

/* ---------- 显现协议 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 0.55s var(--ease) var(--reveal-delay, 0ms),
    transform 0.55s var(--ease) var(--reveal-delay, 0ms);
}

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

/* ============================================================
   头部 · 侧边轨道
   ============================================================ */
.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 400;
  padding: 10px 18px;
  background: var(--coral-500);
  color: var(--abyss-950);
  border: 2px solid var(--abyss-950);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 0.22s var(--ease);
}

.skip-link:focus,
.skip-link:focus-visible { transform: none; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 120;
  width: var(--rail-w);
  background: var(--abyss-950);
  color: var(--sand-100);
  border-right: 1px solid var(--hair);
  box-shadow: 1px 0 0 0 rgba(46, 217, 206, 0.14);
}

.rail {
  display: flex;
  flex-direction: column;
  gap: 24px;
  height: 100%;
  padding: 26px var(--rail-pad) 22px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(220, 231, 232, 0.28) transparent;
}

.rail::-webkit-scrollbar { width: 4px; }
.rail::-webkit-scrollbar-thumb { background: rgba(220, 231, 232, 0.26); }

.rail__cap {
  display: grid;
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--hair-soft);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand__mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: none;
  border: 2px solid var(--sand-100);
  box-shadow: 3px 3px 0 0 var(--coral-500);
  transition: box-shadow 0.2s var(--ease), transform 0.2s var(--ease);
}

.brand:hover .brand__mark {
  transform: translate(-1px, -1px);
  box-shadow: 5px 5px 0 0 var(--cyan-400);
}

.brand__dot {
  display: block;
  width: 10px;
  height: 10px;
  background: var(--cyan-400);
  box-shadow: 0 0 0 3px rgba(46, 217, 206, 0.22);
}

.brand__name {
  display: block;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.1;
  color: var(--white-050);
}

.brand__sub {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  line-height: 1.4;
  color: rgba(220, 231, 232, 0.6);
}

.rail__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  line-height: 1.5;
  color: rgba(220, 231, 232, 0.42);
}

.rail__nav { padding-block: 2px; }

.navlist {
  display: grid;
  gap: 2px;
}

.navlist__item { display: block; }

.navlink {
  position: relative;
  display: grid;
  grid-template-columns: 32px 1fr;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0 9px 14px;
  color: rgba(243, 235, 221, 0.72);
  text-decoration: none;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.navlink::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  background: transparent;
  transition: background 0.2s var(--ease);
}

.navlink__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--tide-600);
  transition: color 0.2s var(--ease);
}

.navlink__txt {
  font-size: 15px;
  letter-spacing: 0.03em;
  line-height: 1.5;
}

.navlink:hover {
  color: var(--white-050);
  background: rgba(46, 217, 206, 0.07);
}

.navlink:hover .navlink__idx { color: var(--cyan-400); }

.navlink:hover::before { background: rgba(46, 217, 206, 0.5); }

.navlink[aria-current="page"] {
  color: var(--white-050);
  background: rgba(255, 106, 69, 0.1);
}

.navlink[aria-current="page"]::before { background: var(--coral-500); }

.navlink[aria-current="page"] .navlink__idx { color: var(--coral-500); }

/* 收藏抽屉 */
.rail__drawer {
  border-top: 1px solid var(--hair-soft);
  border-bottom: 1px solid var(--hair-soft);
}

.drawer__handle {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 12px 0;
  background: none;
  border: 0;
  color: var(--sand-100);
  text-align: left;
  cursor: pointer;
  transition: color 0.2s var(--ease);
}

.drawer__handle:hover { color: var(--cyan-400); }

.drawer__idx {
  font-size: 12px;
  line-height: 1;
  color: var(--coral-500);
}

.drawer__label {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.drawer__hint {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: rgba(220, 231, 232, 0.4);
}

.rail__drawer[data-open] .drawer__hint { color: var(--cyan-400); }

.drawer__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.34s var(--ease);
}

.rail__drawer[data-open] .drawer__panel,
.rail__drawer:focus-within .drawer__panel { max-height: 280px; }

@media (hover: hover) and (pointer: fine) {
  .rail__drawer:hover .drawer__panel { max-height: 280px; }
}

.drawer__note {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: rgba(220, 231, 232, 0.4);
  padding: 2px 0 8px;
}

.drawer__list {
  display: grid;
  gap: 2px;
  padding-bottom: 14px;
}

.drawer__list a {
  display: block;
  padding: 6px 0 6px 14px;
  border-left: 2px solid rgba(46, 217, 206, 0.28);
  font-size: 13.5px;
  letter-spacing: 0.03em;
  color: rgba(243, 235, 221, 0.78);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.drawer__list a:hover {
  color: var(--white-050);
  border-left-color: var(--coral-500);
  padding-left: 18px;
}

.rail__foot {
  margin-top: auto;
  display: grid;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--hair-soft);
}

.rail__status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  line-height: 1.5;
  color: rgba(220, 231, 232, 0.55);
}

/* 滚动进度 */
.rail__progress {
  position: absolute;
  top: 0;
  right: 0;
  width: 3px;
  height: 100%;
  pointer-events: none;
  background: rgba(220, 231, 232, 0.08);
}

.rail__progress > span {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleY(var(--p, 0));
  transform-origin: top center;
  background: linear-gradient(180deg, var(--cyan-400), var(--coral-500));
  transition: transform 0.1s linear;
}

/* 移动端顶部条 */
.masthead { display: none; }

.brand--compact { display: none; }

.navtoggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: transparent;
  border: 2px solid rgba(243, 235, 221, 0.28);
  color: var(--sand-100);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.navtoggle:hover {
  border-color: var(--cyan-400);
  color: var(--cyan-400);
}

.navtoggle__bars { display: block; width: 20px; }

.navtoggle__bars i {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: transform 0.24s var(--ease), opacity 0.2s var(--ease);
}

.navtoggle__bars i + i { margin-top: 5px; }

.site-header[data-open] .navtoggle__bars i:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.site-header[data-open] .navtoggle__bars i:nth-child(2) { opacity: 0; }
.site-header[data-open] .navtoggle__bars i:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   页脚
   ============================================================ */
.site-footer {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-top: 3px solid var(--coral-500);
  color: var(--sand-100);
  background:
    radial-gradient(900px 360px at 86% -30%, rgba(46, 217, 206, 0.18), transparent 70%),
    radial-gradient(760px 380px at 4% 130%, rgba(255, 106, 69, 0.14), transparent 70%),
    linear-gradient(180deg, var(--abyss-950) 0%, var(--abyss-800) 100%);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(220, 231, 232, 0.06) 0 1px, transparent 1px 120px),
    repeating-linear-gradient(0deg, rgba(220, 231, 232, 0.05) 0 1px, transparent 1px 120px);
}

.foot__grid {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 76px) var(--gutter) clamp(28px, 4vw, 44px);
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.8fr) minmax(0, 1.15fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: start;
}

.foot__brand { display: grid; gap: 16px; }

.foot__mark {
  justify-self: start;
  padding-bottom: 8px;
  border-bottom: 3px solid var(--coral-500);
  font-family: var(--font-display);
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 800;
  letter-spacing: 0.05em;
  line-height: 1;
  color: var(--white-050);
}

.foot__sig {
  max-width: 32ch;
  font-size: 14px;
  line-height: 1.8;
  letter-spacing: 0.02em;
  color: rgba(243, 235, 221, 0.68);
}

.foot__ver {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: rgba(46, 217, 206, 0.82);
}

.foot__hd {
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.18em;
  line-height: 1.5;
  text-transform: uppercase;
  color: var(--coral-500);
}

.foot__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 20px;
}

.foot__list a {
  position: relative;
  display: inline-block;
  padding: 5px 0;
  font-size: 14.5px;
  letter-spacing: 0.03em;
  color: rgba(243, 235, 221, 0.78);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.foot__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 0;
  height: 2px;
  background: var(--cyan-400);
  transition: width 0.24s var(--ease);
}

.foot__list a:hover { color: var(--white-050); }
.foot__list a:hover::after { width: 100%; }

.foot__contact { position: relative; }

@media (min-width: 961px) {
  .foot__contact {
    padding-left: clamp(0px, 2vw, 28px);
    border-left: 1px solid var(--hair);
  }
}

.foot__lead {
  max-width: 34ch;
  margin-bottom: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(243, 235, 221, 0.7);
}

.channels { display: grid; gap: 10px; }

.channels__item {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--hair-soft);
}

.channels__key {
  min-width: 36px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: rgba(220, 231, 232, 0.48);
}

.channels__val {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  line-height: 1.6;
  color: var(--white-050);
  overflow-wrap: anywhere;
}

.copybtn {
  margin-left: auto;
  flex: none;
  padding: 3px 8px;
  background: transparent;
  border: 1px solid rgba(46, 217, 206, 0.45);
  color: var(--cyan-400);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.copybtn:hover {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--abyss-950);
}

.copybtn.is-copied {
  background: var(--coral-500);
  border-color: var(--coral-500);
  color: var(--abyss-950);
}

.foot__contact .btn { margin-top: 20px; }

.foot__base {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: 18px var(--gutter) 26px;
  border-top: 1px solid var(--hair);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
}

.foot__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}

.foot__legal a {
  font-size: 13px;
  letter-spacing: 0.03em;
  color: rgba(243, 235, 221, 0.7);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.foot__legal a:hover {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.foot__copy {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: rgba(220, 231, 232, 0.45);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1180px) and (min-width: 961px) {
  :root { --rail-w: 208px; --rail-pad: 18px; }
  .navlink { grid-template-columns: 28px 1fr; gap: 8px; padding-left: 12px; }
  .navlink__txt { font-size: 14px; }
}

@media (max-width: 960px) {
  body {
    padding-left: 0;
    padding-top: var(--mast-h);
  }

  .site-header {
    top: 0;
    right: 0;
    bottom: auto;
    left: 0;
    width: auto;
    height: var(--mast-h);
    border-right: 0;
    border-bottom: 1px solid var(--hair);
    box-shadow: 0 1px 0 0 rgba(46, 217, 206, 0.12);
  }

  .masthead {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    height: 100%;
    padding: 0 16px;
  }

  .brand--compact { display: flex; }
  .brand--compact .brand__mark { width: 28px; height: 28px; box-shadow: 2px 2px 0 0 var(--coral-500); }
  .brand--compact .brand__name { font-size: 16px; }
  .brand--compact .brand__sub { font-size: 9px; margin-top: 2px; }

  .rail {
    position: fixed;
    top: var(--mast-h);
    left: 0;
    bottom: 0;
    width: min(88vw, 340px);
    height: auto;
    padding: 22px 20px 26px;
    background: var(--abyss-950);
    border-right: 1px solid var(--hair);
    box-shadow: 14px 0 0 0 rgba(4, 16, 25, 0.24);
    transform: translateX(-104%);
    transition: transform 0.34s var(--ease);
    z-index: 118;
  }

  .site-header[data-open] .rail { transform: none; }

  .rail__cap .brand { display: none; }

  .rail__progress {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    width: auto;
    height: 2px;
  }

  .rail__progress > span {
    transform: scaleX(var(--p, 0));
    transform-origin: left center;
    background: linear-gradient(90deg, var(--cyan-400), var(--coral-500));
  }

  .foot__grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

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

@media (max-width: 640px) {
  body { font-size: 16px; line-height: 1.8; }

  .masthead { padding: 0 12px; }

  .rail { width: min(92vw, 340px); }

  .rail__status { font-size: 10px; }

  .navlink { padding-block: 11px; }

  .drawer__panel { max-height: 0; }

  .rail__drawer[data-open] .drawer__panel { max-height: 320px; }

  .foot__list { grid-template-columns: 1fr; }

  .channels__item { gap: 6px 10px; }

  .channels__val { flex: 1 1 60%; }

  .copybtn { margin-left: 0; }

  .foot__contact .btn { width: 100%; }

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

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::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;
  }

  .lamp { animation: none !important; opacity: 1 !important; }
}