/* ===========================================================
   搏鱼体育赛事 · 共享样式表 /assets/site.css
   深海竞技场 × 数据驾驶舱
   =========================================================== */

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

html, body, div, span, h1, h2, h3, h4, h5, h6, p, ul, ol, li,
figure, figcaption, blockquote, dl, dt, dd, table, thead, tbody,
tr, th, td, button, input, textarea, select {
  margin: 0;
  padding: 0;
}

ul, ol { list-style: none; }
table { border-collapse: collapse; border-spacing: 0; }
img, svg, video { max-width: 100%; display: block; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }

/* ---------- 2. 设计变量 ---------- */
:root {
  --abyss: #071A2B;
  --deep: #0E2A45;
  --flow: #183F63;
  --surge: #2E6493;
  --silver: #A9B7C4;
  --mist: #EDF3F8;
  --orange: #FF6A2B;
  --cyan: #2FD4C8;
  --ink: #03111C;
  --amber: #E3A63C;

  --font-sans: "Source Han Sans SC", "Noto Sans SC", "OPPO Sans", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular,
    Menlo, Consolas, "Courier New", monospace;

  --shell: 1480px;
  --gutter: 24px;
  --header-h: 66px;
  --bevel: 26px;
  --ease: cubic-bezier(.22, .68, .32, 1);
  --shadow-panel: 0 34px 62px -48px #000, 0 1px 0 rgba(237, 243, 248, .05) inset;
  --shadow-panel-light: 0 30px 54px -42px rgba(3, 17, 28, .7);
}

@media (max-width: 640px) {
  :root { --gutter: 16px; --header-h: 60px; --bevel: 18px; }
}

/* ---------- 3. 基础层 ---------- */
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100%;
  background:
    radial-gradient(1200px 620px at 84% -10%, rgba(46, 100, 147, .28), transparent 62%),
    radial-gradient(900px 520px at -12% 16%, rgba(47, 212, 200, .08), transparent 58%),
    var(--abyss);
  background-attachment: fixed;
  color: var(--silver);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

::selection { background: var(--orange); color: #08131f; }

.skip-link {
  position: absolute;
  left: 14px;
  top: -70px;
  z-index: 200;
  display: inline-block;
  padding: 11px 20px;
  background: var(--orange);
  color: #08131f;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  transition: top .2s var(--ease);
}

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

/* ---------- 4. 排版与工具类 ---------- */
.shell {
  width: min(var(--shell), 100% - var(--gutter) * 2);
  margin-inline: auto;
}

.index-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--silver);
}

.rule {
  width: 100%;
  height: 1px;
  border: 0;
  background: var(--flow);
}

.bevel {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--bevel)), calc(100% - var(--bevel)) 100%, 0 100%);
}

.prose {
  max-width: 74ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--silver);
}

.prose > * + * { margin-top: 1.05em; }

.prose h2 {
  font-size: clamp(22px, 2.2vw, 32px);
  font-weight: 900;
  letter-spacing: -.01em;
  line-height: 1.2;
  color: var(--mist);
  margin-top: 1.9em;
}

.prose h3 {
  font-size: clamp(18px, 1.5vw, 22px);
  font-weight: 800;
  letter-spacing: -.005em;
  color: var(--mist);
  margin-top: 1.6em;
}

.prose strong { color: var(--mist); font-weight: 700; }

.prose a {
  color: var(--mist);
  border-bottom: 1px solid var(--surge);
}

.prose a:hover { color: var(--cyan); border-color: var(--cyan); }

.prose blockquote {
  border-left: 2px solid var(--orange);
  padding: 2px 0 2px 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.prose ul { display: grid; gap: 8px; }

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

.prose ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 9px;
  height: 1px;
  background: var(--orange);
}

.prose code {
  font-family: var(--font-mono);
  font-size: .88em;
  padding: 2px 6px;
  background: rgba(46, 100, 147, .22);
  color: var(--cyan);
}

/* ---------- 5. 共享头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 26, 43, .94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--flow);
  color: var(--mist);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    180deg,
    rgba(169, 183, 196, .05) 0 1px,
    transparent 1px 4px
  );
  opacity: .55;
}

.header-grid {
  position: relative;
  width: min(var(--shell), 100% - var(--gutter) * 2);
  margin-inline: auto;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.8vw, 30px);
}

/* 品牌 */
.brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  padding: 8px 0;
}

.brand-glyph {
  width: 26px;
  height: 26px;
  background: linear-gradient(152deg, var(--orange) 0 46%, var(--cyan) 46% 54%, var(--flow) 54% 100%);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 68% 100%, 0 100%);
  box-shadow: 0 0 0 1px rgba(169, 183, 196, .16);
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.08;
}

.brand-name {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: .07em;
  color: var(--mist);
}

.brand-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .16em;
  color: var(--silver);
}

/* 命令栏 */
.cmdbar {
  flex: 1 1 auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(8px, 1.3vw, 20px);
}

.cmdbar-list {
  display: flex;
  align-items: stretch;
  gap: 2px;
}

.cmd-link {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--silver);
  white-space: nowrap;
  transition: color .2s var(--ease), background-color .2s var(--ease);
}

.cmd-idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--surge);
  opacity: .45;
  transform: translateX(-3px);
  transition: opacity .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}

.cmd-label { display: inline-block; }

.cmd-link:hover {
  color: var(--mist);
  background: rgba(46, 100, 147, .2);
}

.cmd-link:hover .cmd-idx {
  opacity: 1;
  color: var(--cyan);
  transform: none;
}

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

.cmd-link[aria-current="page"] .cmd-idx {
  opacity: 1;
  color: var(--cyan);
  transform: none;
}

.cmd-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 9px;
  right: 9px;
  bottom: 0;
  height: 2px;
  background: var(--cyan);
}

/* 合并入口 */
.cmdbar-pinned {
  display: flex;
  align-items: center;
  padding-left: clamp(8px, 1.1vw, 18px);
  border-left: 1px solid var(--flow);
}

.cmd-pin {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--mist);
  background: linear-gradient(135deg, rgba(255, 106, 43, .16), rgba(47, 212, 200, .1));
  border: 1px solid var(--flow);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: border-color .2s var(--ease), color .2s var(--ease), background-color .2s var(--ease);
}

.cmd-pin:hover {
  border-color: var(--orange);
  color: #fff;
  background: linear-gradient(135deg, rgba(255, 106, 43, .3), rgba(47, 212, 200, .14));
}

.cmd-pin-star { font-size: 11px; color: var(--orange); }

.cmd-pin-text { white-space: nowrap; }

/* 工具链接 */
.cmdbar-utility {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-left: clamp(8px, 1.1vw, 18px);
  border-left: 1px solid var(--flow);
}

.util-link {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--silver);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.util-link:hover { color: var(--cyan); border-color: var(--cyan); }

/* 折叠按钮 */
.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 13px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
  background: rgba(14, 42, 69, .75);
  border: 1px solid var(--flow);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%);
}

.nav-toggle-box {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 18px;
}

.nav-toggle-box span {
  display: block;
  height: 2px;
  background: var(--cyan);
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(2) { opacity: 0; }

.nav-toggle[aria-expanded="true"] .nav-toggle-box span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* 滚动进度轨 */
.scroll-rail {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: rgba(24, 63, 99, .6);
  overflow: hidden;
}

.scroll-rail-fill {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background: linear-gradient(90deg, var(--orange), var(--cyan));
  transition: transform .12s linear;
}

/* ---------- 6. 共享页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: clamp(72px, 9vw, 140px);
  background: linear-gradient(180deg, var(--deep), var(--abyss) 78%);
  border-top: 1px solid var(--flow);
  color: var(--silver);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--orange) 0 88px, var(--cyan) 88px 132px, var(--flow) 132px 100%);
}

.footer-stack {
  width: min(var(--shell), 100% - var(--gutter) * 2);
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(280px, 1.15fr) repeat(4, minmax(120px, .7fr));
  gap: clamp(24px, 3vw, 48px);
  padding: clamp(48px, 6vw, 84px) 0 clamp(32px, 4vw, 56px);
}

.footer-brand {
  position: relative;
  padding: 22px 22px 26px;
  background: linear-gradient(160deg, rgba(24, 63, 99, .55), rgba(7, 26, 43, .92));
  border: 1px solid var(--flow);
  box-shadow: var(--shadow-panel);
}

.footer-brand::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    180deg,
    rgba(169, 183, 196, .05) 0 1px,
    transparent 1px 5px
  );
}

.footer-brand::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: var(--bevel);
  height: var(--bevel);
  pointer-events: none;
  border-right: 1px solid var(--flow);
  border-bottom: 1px solid var(--flow);
  background: linear-gradient(
    135deg,
    transparent 0 48%,
    var(--flow) 48% 51%,
    var(--abyss) 51% 100%
  );
}

.footer-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  color: var(--surge);
  margin-bottom: 12px;
}

.footer-brand-name {
  font-size: clamp(19px, 1.6vw, 24px);
  font-weight: 900;
  letter-spacing: .04em;
  color: var(--mist);
  line-height: 1.2;
}

.footer-brand-tag {
  margin-top: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--silver);
}

.footer-contact {
  display: grid;
  gap: 9px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--flow);
}

.mail-copy {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 3px 0;
  text-align: left;
  color: var(--mist);
  border-bottom: 1px dashed rgba(24, 63, 99, .95);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.mail-copy:hover,
.mail-copy[data-copied] { color: var(--cyan); border-color: var(--cyan); }

.mail-copy-key {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--surge);
}

.mail-copy-value {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .01em;
  word-break: break-all;
}

.copy-hint {
  flex: 0 0 auto;
  margin-left: auto;
  padding: 0 5px;
  font-family: var(--font-sans);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--orange);
  border: 1px solid rgba(255, 106, 43, .55);
  opacity: 0;
  transition: opacity .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.mail-copy:hover .copy-hint,
.mail-copy:focus-visible .copy-hint,
.mail-copy[data-copied] .copy-hint { opacity: 1; }

.mail-copy[data-copied] .copy-hint { color: var(--cyan); border-color: rgba(47, 212, 200, .6); }

.contact-line {
  display: flex;
  gap: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--silver);
}

.contact-key {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--surge);
  padding-top: 3px;
}

.footer-cta { margin-top: 22px; }

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col-title {
  padding-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--orange);
  border-bottom: 1px solid var(--flow);
}

.footer-col-list { display: grid; gap: 9px; }

.footer-link {
  display: inline-flex;
  align-items: baseline;
  gap: 9px;
  font-size: 14px;
  color: var(--silver);
  transition: color .18s var(--ease), transform .18s var(--ease);
}

.footer-link-idx {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .12em;
  color: var(--surge);
}

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

.footer-link:hover .footer-link-idx { color: var(--cyan); }

.footer-base {
  width: min(var(--shell), 100% - var(--gutter) * 2);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 26px;
  padding: 20px 0 28px;
  border-top: 1px solid var(--flow);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--silver);
}

.footer-legal { color: var(--mist); }

.footer-copyright { margin-left: auto; color: var(--surge); }

.to-top {
  position: fixed;
  right: clamp(14px, 2vw, 34px);
  bottom: clamp(14px, 2vw, 34px);
  z-index: 90;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 15px;
  background: var(--orange);
  color: #08131f;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 9px), calc(100% - 9px) 100%, 0 100%);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
}

.to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top-mark { font-family: var(--font-mono); font-size: 14px; line-height: 1; }

.to-top-label { white-space: nowrap; }

/* ---------- 7. 通用组件 ---------- */
/* 堆叠画板 */
.panel {
  position: relative;
  padding: clamp(20px, 2.4vw, 38px);
  background: var(--deep);
  border: 1px solid var(--flow);
  box-shadow: var(--shadow-panel);
}

.panel::after {
  content: "";
  position: absolute;
  right: -1px;
  bottom: -1px;
  width: var(--bevel);
  height: var(--bevel);
  pointer-events: none;
  border-right: 1px solid var(--flow);
  border-bottom: 1px solid var(--flow);
  background: linear-gradient(
    135deg,
    transparent 0 48%,
    var(--flow) 48% 51%,
    var(--abyss) 51% 100%
  );
}

.panel--mist {
  background: var(--mist);
  border-color: rgba(7, 26, 43, .16);
  color: var(--deep);
  box-shadow: var(--shadow-panel-light);
}

.panel--slim { padding: clamp(15px, 1.6vw, 24px); }

.panel--offset { margin-left: clamp(0px, 3vw, 56px); }

.panel__index {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--surge);
}

.panel__title {
  font-size: clamp(20px, 2vw, 30px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--mist);
}

.panel--mist .panel__title { color: var(--abyss); }

.panel__note {
  margin-top: 12px;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--silver);
}

.panel--mist .panel__note { color: var(--deep); }

/* 展览标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--silver);
  background: rgba(46, 100, 147, .14);
  border: 1px solid var(--flow);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
}

.tag--orange {
  color: var(--orange);
  background: rgba(255, 106, 43, .1);
  border-color: rgba(255, 106, 43, .55);
}

.tag--cyan {
  color: var(--cyan);
  background: rgba(47, 212, 200, .08);
  border-color: rgba(47, 212, 200, .5);
}

/* 数据带 */
.datastrip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 22px;
  padding: 11px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--silver);
  background: linear-gradient(90deg, rgba(24, 63, 99, .42), transparent 78%);
  border-top: 1px solid var(--flow);
  border-bottom: 1px solid var(--flow);
}

/* 统计块 */
.stat {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 15px 16px;
  background: linear-gradient(160deg, rgba(24, 63, 99, .38), rgba(7, 26, 43, .62));
  border: 1px solid var(--flow);
}

.stat__value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 38px);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--mist);
}

.stat__value--accent { color: var(--orange); }

.stat__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--silver);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--mist);
  background: rgba(24, 63, 99, .45);
  border: 1px solid var(--flow);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: transform .2s var(--ease), background-color .2s var(--ease),
    color .2s var(--ease), border-color .2s var(--ease);
}

.btn:hover {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
  background: rgba(47, 212, 200, .12);
}

.btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #08131f;
}

.btn--primary:hover {
  background: #ff7d45;
  border-color: #ff7d45;
  color: #08131f;
}

.btn--ghost { background: transparent; }

/* 面包屑 */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 14px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--silver);
}

.crumbs li { display: inline-flex; align-items: center; }

.crumbs li::after {
  content: "/";
  margin-left: 8px;
  color: var(--surge);
}

.crumbs li:last-child::after { content: ""; margin: 0; }

.crumbs a:hover { color: var(--cyan); }

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

/* 十二列栅格 */
.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: clamp(16px, 1.8vw, 28px);
}

.g-3 { grid-column: span 3; }
.g-4 { grid-column: span 4; }
.g-5 { grid-column: span 5; }
.g-6 { grid-column: span 6; }
.g-7 { grid-column: span 7; }
.g-8 { grid-column: span 8; }
.g-9 { grid-column: span 9; }

/* 图片容器 */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: linear-gradient(150deg, var(--deep), var(--abyss) 72%);
  border: 1px solid var(--flow);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--bevel)), calc(100% - var(--bevel)) 100%, 0 100%);
}

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

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .5;
  background-image: repeating-linear-gradient(
    180deg,
    rgba(3, 17, 28, .3) 0 1px,
    transparent 1px 4px
  );
}

.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--3x4 { aspect-ratio: 3 / 4; }

.media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  z-index: 1;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: var(--mist);
  background: rgba(3, 17, 28, .8);
  border-top: 1px solid var(--flow);
}

/* ---------- 8. 动效与降级 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}

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

/* ---------- 9. 响应式 ---------- */
@media (max-width: 1280px) {
  .cmd-link { padding: 9px 8px; font-size: 12.5px; }
  .cmdbar-utility { gap: 11px; }
}

@media (max-width: 1180px) {
  .brand-tag { display: none; }
  .cmdbar-utility { display: none; }
}

@media (max-width: 1079px) {
  .header-grid { justify-content: space-between; }
  .nav-toggle { display: inline-flex; }

  .cmdbar {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 6px 0 16px;
    background: var(--deep);
    border-top: 1px solid var(--flow);
    border-bottom: 1px solid var(--flow);
    box-shadow: 0 34px 48px -30px #000;
    max-height: calc(100vh - var(--header-h) - 12px);
    overflow-y: auto;
  }

  .cmdbar[data-open] { display: flex; }

  .cmdbar-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .cmd-link {
    padding: 14px 22px;
    font-size: 15px;
    border-bottom: 1px solid rgba(24, 63, 99, .65);
  }

  .cmd-idx { font-size: 11px; opacity: .6; transform: none; }

  .cmd-link[aria-current="page"] {
    background: rgba(47, 212, 200, .08);
    box-shadow: inset 3px 0 0 var(--cyan);
  }

  .cmd-link[aria-current="page"]::after { display: none; }

  .cmdbar-pinned,
  .cmdbar-utility {
    border-left: 0;
    border-top: 1px solid var(--flow);
    padding: 14px 22px 0;
    margin-top: 12px;
  }

  .cmdbar-utility { display: flex; flex-wrap: wrap; gap: 16px; }

  .cmd-pin { width: 100%; justify-content: center; padding: 11px 14px; }

  .footer-stack { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .g-3, .g-4, .g-6 { grid-column: span 6; }
  .g-5, .g-7, .g-8, .g-9 { grid-column: span 12; }
}

@media (max-width: 640px) {
  .site-footer { margin-top: 64px; }

  .footer-stack {
    grid-template-columns: minmax(0, 1fr);
    gap: 34px;
    padding: 44px 0 30px;
  }

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

  .footer-copyright { margin-left: 0; }

  .grid { grid-template-columns: minmax(0, 1fr); }
  .g-3, .g-4, .g-5, .g-6, .g-7, .g-8, .g-9 { grid-column: span 1; }

  .to-top { padding: 10px 12px; }
  .to-top-label { display: none; }
}

/* ---------- 10. 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }

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

  .scroll-rail-fill { transition: none; }
}