/* =====================================================
   博鱼赛场 · 共享站点样式 /assets/site.css
   ===================================================== */

/* ---------- 1. 设计变量 ---------- */
:root{
  --deep-sea:#062A33;
  --ink:#04181F;
  --cyan:#2FF3D0;
  --coral:#FF6B4A;
  --sand:#D9B36C;
  --aqua:#5BC8FF;
  --mist:#EAF6F5;
  --slate:#6E8A8D;
  --wine:#7A1F3D;
  --indigo:#3B2A6B;

  --mist-06:rgba(234,246,245,.06);
  --mist-10:rgba(234,246,245,.10);
  --mist-16:rgba(234,246,245,.16);
  --mist-64:rgba(234,246,245,.64);
  --mist-86:rgba(234,246,245,.86);
  --cyan-16:rgba(47,243,208,.16);
  --cyan-30:rgba(47,243,208,.30);
  --sand-40:rgba(217,179,108,.40);

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

  --radius-lg:32px;
  --radius-md:24px;
  --radius-sm:14px;
  --radius-pill:999px;

  --maxw:1280px;
  --pad-x:clamp(1.15rem,4vw,4.5rem);
  --gap:clamp(1rem,2.4vw,2rem);
  --section-y:clamp(3.5rem,8vw,7rem);

  --ease:cubic-bezier(.22,.86,.28,1);
  --shadow-lift:0 18px 44px -22px rgba(0,0,0,.78);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{
  -webkit-text-size-adjust:100%;
  scroll-behavior:smooth;
  scroll-padding-top:96px;
}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:clamp(.95rem,.25vw + .88rem,1.06rem);
  line-height:1.7;
  color:var(--mist);
  background-color:var(--deep-sea);
  background-image:
    radial-gradient(1100px 620px at 6% -10%,rgba(47,243,208,.10),transparent 62%),
    radial-gradient(900px 520px at 98% 2%,rgba(91,200,255,.09),transparent 60%),
    radial-gradient(900px 760px at 56% 112%,rgba(59,42,107,.16),transparent 66%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:900;
  line-height:1.06;
  letter-spacing:-.02em;
  margin:0;
  text-wrap:balance;
}
p{margin:0}
a{color:inherit;text-decoration:none}
img,picture,video,svg{display:block;max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
ul,ol{margin:0;padding:0}
ul[class],ol[class]{list-style:none}
::selection{background:var(--cyan);color:var(--ink)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

/* ---------- 3. 布局容器 ---------- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad-x)}
.container--narrow{max-width:860px}
.container--wide{max-width:1480px}

#main-content{display:block;position:relative;z-index:1}
#main-content:focus{outline:none}

.section{position:relative;padding-block:var(--section-y)}
.section--tight{padding-block:clamp(2rem,4vw,3rem)}
.section--ink{background:var(--ink);border-block:1px solid var(--mist-10)}
.section--wine{
  background:linear-gradient(180deg,rgba(122,31,61,.22),rgba(122,31,61,.05));
  border-block:1px solid var(--sand-40);
}
.section--indigo{
  background:linear-gradient(180deg,rgba(59,42,107,.30),rgba(59,42,107,.07));
  border-block:1px solid rgba(91,200,255,.16);
}

/* ---------- 4. 排版组件 ---------- */
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:.6rem;
  margin:0 0 1rem;
  font-family:var(--font-mono);
  font-size:.7rem;
  font-weight:500;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--cyan);
}
.eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  background:linear-gradient(90deg,var(--cyan),rgba(47,243,208,0));
}
.section-title{font-size:clamp(1.75rem,4.2vw,3.1rem);margin:0 0 .8rem}
.section-title--xl{font-size:clamp(2.4rem,7vw,5.4rem);line-height:.94}
.title-accent{color:var(--cyan)}
.lede{
  font-size:clamp(1rem,.45vw + .92rem,1.18rem);
  line-height:1.8;
  color:var(--mist-64);
  max-width:58ch;
}
.prose{max-width:68ch;line-height:1.8;color:var(--mist-86)}
.prose > * + *{margin-top:1.05em}
.prose h2{font-size:clamp(1.35rem,2.4vw,1.85rem);margin-top:1.8em;color:var(--mist)}
.prose h3{font-size:clamp(1.1rem,1.8vw,1.32rem);margin-top:1.5em;color:var(--cyan);font-weight:700}
.prose strong{color:var(--mist);font-weight:700}
.prose a{color:var(--aqua);text-decoration:underline;text-underline-offset:3px}
.prose ul,.prose ol{padding-left:1.3em;list-style:disc}
.prose li + li{margin-top:.45em}
.vertical-note{
  writing-mode:vertical-rl;
  margin:0;
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.42em;
  text-transform:uppercase;
  color:var(--slate);
}
.data-line{
  height:1px;
  width:100%;
  margin:0;
  background:linear-gradient(90deg,var(--cyan-30),rgba(91,200,255,.16) 45%,transparent);
}
.data-line--full{
  background:linear-gradient(90deg,var(--cyan),var(--aqua) 40%,var(--sand) 72%,transparent);
}

/* ---------- 5. 按钮与胶囊 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:.55rem;
  padding:.85rem 1.6rem;
  border:1px solid transparent;
  border-radius:var(--radius-pill);
  font-family:var(--font-display);
  font-weight:700;
  font-size:.95rem;
  letter-spacing:.02em;
  white-space:nowrap;
  cursor:pointer;
  transition:transform .25s var(--ease),background-color .25s var(--ease),
             color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--primary{background:var(--coral);color:var(--ink);box-shadow:0 10px 26px -14px rgba(255,107,74,.9)}
.btn--primary:hover{background:#ff8266}
.btn--cyan{background:var(--cyan);color:var(--ink)}
.btn--cyan:hover{background:#63f7dd}
.btn--sand{background:transparent;color:var(--sand);border-color:var(--sand-40)}
.btn--sand:hover{background:rgba(217,179,108,.14);color:#f0d29a}
.btn--ghost{background:transparent;color:var(--mist);border-color:var(--mist-16)}
.btn--ghost:hover{border-color:var(--cyan-30);color:var(--cyan)}
.btn--sm{padding:.55rem 1.05rem;font-size:.82rem}

.pill{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  padding:.32rem .8rem;
  border:1px solid var(--mist-16);
  border-radius:var(--radius-pill);
  background:var(--mist-06);
  color:var(--mist-64);
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.08em;
  white-space:nowrap;
}
.pill--cyan{color:var(--cyan);border-color:var(--cyan-30);background:rgba(47,243,208,.09)}
.pill--coral{color:var(--coral);border-color:rgba(255,107,74,.40);background:rgba(255,107,74,.10)}
.pill--sand{color:var(--sand);border-color:var(--sand-40);background:rgba(217,179,108,.09)}
.pill__dot{width:6px;height:6px;border-radius:50%;background:currentColor;box-shadow:0 0 8px currentColor}

/* ---------- 6. 卡片 / 网格 / 数据 ---------- */
.grid{display:grid;gap:var(--gap)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid--aside{grid-template-columns:minmax(0,7fr) minmax(0,5fr);align-items:start}

.card{
  position:relative;
  padding:clamp(1.2rem,2.2vw,1.9rem);
  border:1px solid var(--mist-10);
  border-radius:var(--radius-md);
  background:linear-gradient(160deg,rgba(234,246,245,.055),rgba(234,246,245,.02));
  transition:transform .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.card::after{
  content:"";
  position:absolute;
  left:clamp(1.2rem,2.2vw,1.9rem);
  right:clamp(1.2rem,2.2vw,1.9rem);
  bottom:0;
  height:1px;
  background:linear-gradient(90deg,var(--cyan),transparent);
  opacity:0;
  transition:opacity .3s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--cyan-30);box-shadow:var(--shadow-lift)}
.card:hover::after{opacity:1}
.card__title{font-size:clamp(1.05rem,1.6vw,1.25rem);margin:0 0 .5rem}
.card__text{margin:0;font-size:.94rem;line-height:1.75;color:var(--mist-64)}

.stat{display:flex;flex-direction:column;gap:.25rem}
.stat__value{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:clamp(1.6rem,3.4vw,2.6rem);
  line-height:1;
  letter-spacing:-.02em;
  color:var(--cyan);
}
.stat__label{
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--slate);
}

/* ---------- 7. 面包屑 ---------- */
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.45rem;
  margin:0;
  padding:0;
  list-style:none;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
  color:var(--slate);
}
.breadcrumb li{display:flex;align-items:center;gap:.45rem}
.breadcrumb li + li::before{content:"/";color:rgba(110,138,141,.55)}
.breadcrumb a{color:var(--mist-64);transition:color .2s ease}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb [aria-current="page"]{color:var(--sand)}

/* ---------- 8. 图片容器基础 ---------- */
.media{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  aspect-ratio:16/10;
  border:1px solid var(--mist-10);
  border-radius:var(--radius-lg);
  background:
    linear-gradient(135deg,rgba(47,243,208,.12),rgba(91,200,255,.06) 45%,rgba(59,42,107,.20)),
    var(--ink);
}
.media > img,
.media > picture,
.media > picture > img,
.media > video{width:100%;height:100%;object-fit:cover}
.media::before{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  pointer-events:none;
  opacity:.5;
  mix-blend-mode:screen;
  background:
    repeating-linear-gradient(90deg,rgba(47,243,208,.10) 0 1px,transparent 1px 64px),
    repeating-linear-gradient(0deg,rgba(47,243,208,.07) 0 1px,transparent 1px 64px);
}
.media::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:46%;
  z-index:1;
  pointer-events:none;
  background:linear-gradient(180deg,transparent,rgba(4,24,31,.72));
}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:3/4}
.media--square{aspect-ratio:1/1}
.media--free{aspect-ratio:auto;min-height:220px}
.media > .media__caption{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  z-index:2;
  margin:0;
  padding:1rem 1.3rem;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
  color:var(--mist-86);
  background:linear-gradient(180deg,transparent,rgba(4,24,31,.82));
}

/* ---------- 9. 显现动效 ---------- */
.reveal{
  opacity:0;
  transform:translateY(18px);
  transition:opacity .7s var(--ease),transform .7s var(--ease);
}
.reveal.is-visible{opacity:1;transform:none}

/* ---------- 10. 跳转链接 ---------- */
.skip-link{
  position:fixed;
  top:.5rem;
  left:.5rem;
  z-index:200;
  padding:.7rem 1.15rem;
  border-radius:var(--radius-pill);
  background:var(--cyan);
  color:var(--ink);
  font-weight:700;
  font-size:.9rem;
  transform:translateY(-180%);
  transition:transform .25s var(--ease);
}
.skip-link:focus{transform:translateY(0)}

/* ---------- 11. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:90;
  background:linear-gradient(180deg,rgba(4,24,31,.97) 0%,rgba(6,42,51,.88) 100%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--cyan-16);
}
.header-inner{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  min-height:66px;
  padding:.7rem var(--pad-x);
  display:flex;
  align-items:center;
  gap:clamp(.75rem,2vw,2rem);
}
.brand{
  display:flex;
  align-items:center;
  gap:.7rem;
  flex:0 0 auto;
  padding-block:.35rem;
  border-radius:var(--radius-sm);
  transition:opacity .2s ease;
}
.brand:hover{opacity:.85}
.brand-text{display:flex;flex-direction:column;gap:.2rem;line-height:1}
.brand-mark{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.1rem,1.5vw,1.32rem);
  letter-spacing:.01em;
  color:var(--mist);
}
.brand-sub{
  font-family:var(--font-mono);
  font-size:.58rem;
  letter-spacing:.3em;
  text-transform:uppercase;
  color:var(--slate);
}
.brand-wave{
  position:relative;
  display:block;
  width:clamp(46px,10vw,120px);
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,rgba(47,243,208,.95),rgba(91,200,255,.5) 60%,rgba(47,243,208,0));
}
.brand-wave::after{
  content:"";
  position:absolute;
  right:0;
  top:-3px;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 10px var(--cyan);
  animation:pulse-dot 2.8s var(--ease) infinite;
}
@keyframes pulse-dot{
  0%,100%{opacity:1;transform:scale(1)}
  50%{opacity:.45;transform:scale(.72)}
}

.header-end{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:clamp(.6rem,1.5vw,1.25rem);
  min-width:0;
}
.site-nav{
  display:flex;
  align-items:center;
  gap:clamp(.5rem,1.4vw,1.15rem);
  min-width:0;
}
.nav-list{display:flex;align-items:center;gap:.15rem;margin:0;padding:0;list-style:none}
.nav-link{
  position:relative;
  display:inline-block;
  padding:.55rem .8rem;
  border-radius:var(--radius-pill);
  font-size:.9rem;
  font-weight:500;
  color:rgba(234,246,245,.74);
  white-space:nowrap;
  transition:color .22s var(--ease),background-color .22s var(--ease);
}
.nav-link::after{
  content:"";
  position:absolute;
  left:.8rem;
  right:.8rem;
  bottom:.26rem;
  height:2px;
  border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--aqua));
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .3s var(--ease);
}
.nav-link:hover{color:var(--mist);background:rgba(47,243,208,.08)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link[aria-current="page"]{
  color:var(--ink);
  background:var(--cyan);
  font-weight:700;
}
.nav-link[aria-current="page"]::after{transform:scaleX(0)}

.nav-tools{
  display:flex;
  align-items:center;
  gap:.5rem;
  padding-left:clamp(.4rem,1.2vw,1rem);
  border-left:1px solid var(--mist-10);
}
.nav-tool{
  padding:.4rem .3rem;
  border-radius:6px;
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.1em;
  color:var(--mist-64);
  transition:color .2s ease;
}
.nav-tool:hover{color:var(--aqua)}

.version-badge{
  display:inline-flex;
  align-items:center;
  gap:.45rem;
  padding:.4rem .8rem;
  border:1px solid var(--sand-40);
  border-radius:var(--radius-pill);
  background:rgba(217,179,108,.08);
  color:var(--sand);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
  white-space:nowrap;
}
.version-badge__dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--cyan);
  box-shadow:0 0 8px var(--cyan);
  animation:pulse-dot 2.6s var(--ease) infinite;
}

.nav-toggle{
  position:relative;
  z-index:100;
  display:none;
  align-items:center;
  gap:.5rem;
  flex:0 0 auto;
  padding:.5rem .85rem;
  border:1px solid var(--cyan-30);
  border-radius:var(--radius-pill);
  color:var(--mist);
  transition:background-color .2s ease,border-color .2s ease;
}
.nav-toggle:hover{background:rgba(47,243,208,.10);border-color:var(--cyan)}
.nav-toggle-text{
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.18em;
  text-transform:uppercase;
}
.nav-toggle-bars{display:flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle-bars span{
  display:block;
  height:2px;
  border-radius:2px;
  background:var(--cyan);
  transition:transform .3s var(--ease),opacity .2s ease;
}
.site-header[data-open] .nav-toggle-bars span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bars span:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle-bars span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.scroll-progress{
  position:relative;
  height:2px;
  overflow:hidden;
  background:rgba(47,243,208,.10);
}
.scroll-progress__bar{
  display:block;
  width:0;
  height:100%;
  background:linear-gradient(90deg,var(--cyan),var(--aqua) 55%,var(--coral));
  box-shadow:0 0 10px rgba(47,243,208,.7);
}

body.nav-open{overflow:hidden}

/* ---------- 12. 页脚 ---------- */
.site-footer{
  position:relative;
  overflow:hidden;
  margin-top:clamp(3.5rem,8vw,7rem);
  background:var(--ink);
  color:var(--mist);
  border-top:1px solid rgba(47,243,208,.20);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:2px;
  background:linear-gradient(90deg,var(--cyan),var(--aqua) 38%,var(--sand) 70%,var(--coral));
  opacity:.85;
}
.site-footer::after{
  content:"BOYU ARENA";
  position:absolute;
  right:-1rem;
  bottom:-1.6rem;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(3.6rem,13vw,10rem);
  line-height:.8;
  letter-spacing:-.04em;
  color:rgba(47,243,208,.05);
  pointer-events:none;
  user-select:none;
}
.footer-main{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:clamp(2.6rem,5vw,4rem) var(--pad-x) clamp(2rem,3.5vw,3rem);
  display:grid;
  grid-template-columns:minmax(200px,1.5fr) minmax(120px,.85fr) minmax(120px,.7fr) minmax(200px,1.35fr);
  gap:clamp(1.6rem,3vw,3rem);
  align-items:start;
}
.footer-brand{min-width:0}
.footer-wordmark{
  margin:0 0 .6rem;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(1.35rem,2.2vw,1.7rem);
  letter-spacing:.01em;
  color:var(--mist);
}
.footer-line{
  margin:0 0 1rem;
  max-width:30ch;
  font-size:.95rem;
  line-height:1.75;
  color:var(--mist-64);
}
.footer-version{
  display:inline-flex;
  align-items:center;
  gap:.4rem;
  margin:0;
  padding:.32rem .75rem;
  border:1px solid var(--sand-40);
  border-radius:var(--radius-pill);
  background:rgba(217,179,108,.08);
  color:var(--sand);
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.08em;
}
.footer-col{min-width:0}
.footer-col__title{
  margin:0 0 1rem;
  font-family:var(--font-mono);
  font-weight:500;
  font-size:.68rem;
  letter-spacing:.26em;
  text-transform:uppercase;
  color:var(--slate);
}
.footer-list{display:flex;flex-direction:column;gap:.55rem;margin:0;padding:0;list-style:none}
.footer-link{
  display:inline-block;
  border-radius:4px;
  font-size:.92rem;
  color:rgba(234,246,245,.78);
  transition:color .2s ease,transform .2s ease;
}
.footer-link:hover{color:var(--cyan);transform:translateX(3px)}
.footer-contact{min-width:0}
.footer-list--contact{gap:.9rem}
.footer-contact__label{
  display:block;
  font-family:var(--font-mono);
  font-size:.64rem;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--slate);
}
.footer-contact__value{
  display:block;
  font-family:var(--font-mono);
  font-size:.84rem;
  line-height:1.6;
  color:var(--mist-86);
  word-break:break-word;
}
.footer-base{
  position:relative;
  z-index:1;
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding:1.2rem var(--pad-x) 2rem;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:.6rem 1.6rem;
  border-top:1px solid var(--mist-10);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.05em;
  color:var(--slate);
}
.footer-copy,.footer-icp,.footer-note{margin:0}
.footer-icp{color:rgba(217,179,108,.82)}
.footer-note{flex:1 1 320px;text-align:right}

/* ---------- 13. 响应式 ---------- */
@media (max-width:1080px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:fixed;
    top:0;
    right:0;
    bottom:0;
    z-index:95;
    width:min(86vw,360px);
    display:flex;
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    gap:1.4rem;
    padding:5.5rem 1.6rem 2rem;
    overflow-y:auto;
    overscroll-behavior:contain;
    background:linear-gradient(180deg,var(--ink) 0%,var(--deep-sea) 100%);
    border-left:1px solid var(--cyan-30);
    box-shadow:-28px 0 60px -30px rgba(0,0,0,.9);
    transform:translateX(102%);
    transition:transform .42s var(--ease);
  }
  .site-header[data-open] .site-nav{transform:translateX(0)}
  .nav-list{flex-direction:column;align-items:stretch;gap:.25rem}
  .nav-link{display:block;padding:.78rem .9rem;font-size:1rem;border-radius:var(--radius-sm)}
  .nav-link::after{left:.9rem;right:auto;width:22px;bottom:.5rem}
  .nav-link[aria-current="page"]{background:rgba(47,243,208,.14);color:var(--cyan)}
  .nav-link[aria-current="page"]::after{transform:scaleX(1);background:var(--cyan)}
  .nav-tools{
    flex-direction:column;
    align-items:stretch;
    gap:.7rem;
    padding:1.2rem 0 0;
    border-left:0;
    border-top:1px solid var(--mist-10);
  }
  .nav-tool{padding:.5rem .9rem}
  .nav-tools .btn{width:100%}
}
@media (max-width:900px){
  .grid--3,.grid--4,.grid--aside{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1024px){
  .footer-main{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:720px){
  .vertical-note{writing-mode:horizontal-tb;letter-spacing:.28em}
  .footer-note{flex-basis:100%;text-align:left}
}
@media (max-width:600px){
  .grid--2,.grid--3,.grid--4,.grid--aside{grid-template-columns:minmax(0,1fr)}
  .version-badge{display:none}
  .brand-wave{width:44px}
  .header-inner{min-height:60px}
}
@media (max-width:560px){
  .footer-main{grid-template-columns:minmax(0,1fr)}
}

/* ---------- 14. 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none}
  .btn:hover,.card:hover,.footer-link:hover{transform:none}
}