/* ==========================================================================
   乐鱼体育 · 共享样式表 /assets/site.css
   深海观测船：深海墨蓝底 · 品牌橙行动 · 荧光青绿信号 · 展签式注释
   ========================================================================== */

/* ---------- 1. Tokens ---------- */
:root{
  --deep:#071A2B;
  --teal:#0E3B43;
  --indigo:#25265A;
  --wine:#5A1F2E;
  --orange:#FF6A2A;
  --mint:#4DF0C1;
  --mist:#F2F7F6;
  --sand:#D9C9A3;
  --slate:#8FA6B2;
  --alert:#FF4D5E;

  --ink:var(--mist);
  --ink-soft:rgba(242,247,246,.78);
  --ink-mute:rgba(143,166,178,.95);

  --line:rgba(77,240,193,.18);
  --line-soft:rgba(242,247,246,.13);

  --font-display:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:var(--font-display);
  --font-mono:"IBM Plex Mono","JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --r-xl:36px;
  --r-lg:28px;
  --r-md:22px;
  --r-sm:14px;

  --shell:1240px;
  --header-h:74px;

  --shadow-deep:0 26px 64px rgba(2,10,18,.58);
  --shadow-soft:0 12px 30px rgba(2,10,18,.34);
}

/* ---------- 2. Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100%;
  font-family:var(--font-body);
  font-size:1rem;
  line-height:1.75;
  color:var(--ink);
  background-color:var(--deep);
  background-image:
    radial-gradient(120% 62% at 84% -8%, rgba(77,240,193,.10), transparent 62%),
    radial-gradient(96% 58% at 4% 2%, rgba(37,38,90,.55), transparent 60%),
    radial-gradient(90% 56% at 50% 106%, rgba(14,59,67,.72), transparent 68%);
  background-repeat:no-repeat;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit}
h1,h2,h3,h4,h5,h6{margin:0;line-height:1.16;font-weight:800;letter-spacing:-.015em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
dl,dd,dt{margin:0}
figure{margin:0}
a{color:inherit}
table{border-collapse:collapse;width:100%}
hr{border:0;border-top:1px solid var(--line-soft);margin:0}

:focus-visible{outline:2px solid var(--mint);outline-offset:3px;border-radius:8px}
:focus:not(:focus-visible){outline:none}

::selection{background:rgba(255,106,42,.35);color:var(--mist)}

#main-content{display:block}
#main-content,[data-section]{scroll-margin-top:calc(var(--header-h) + 32px)}

/* ---------- 3. 通用排版与容器 ---------- */
.shell{
  width:100%;
  max-width:var(--shell);
  margin-inline:auto;
  padding-inline:clamp(18px,4vw,40px);
}

.section{padding-block:clamp(52px,7vw,110px)}
.section--tight{padding-block:clamp(28px,4vw,56px)}

.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.3em;
  text-transform:uppercase;
  color:var(--mint);
  margin:0 0 18px;
}
.eyebrow::before{
  content:"";
  width:26px;
  height:1px;
  background:linear-gradient(90deg,var(--orange),rgba(255,106,42,0));
}

.display-title{
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(2.5rem,6.2vw,4.75rem);
  line-height:.98;
  letter-spacing:-.035em;
  margin:0;
  color:var(--mist);
  text-wrap:balance;
}

.annotation{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.26em;
  color:var(--sand);
  writing-mode:vertical-rl;
  text-orientation:mixed;
  border-left:1px solid rgba(217,201,163,.36);
  padding-left:12px;
  margin:0;
  user-select:none;
}

.prose{
  max-width:68ch;
  font-size:clamp(1rem,1.5vw,1.0625rem);
  line-height:1.8;
  color:var(--ink-soft);
}
.prose > * + *{margin-top:1.15em}
.prose h2{
  font-size:clamp(1.4rem,2.4vw,1.9rem);
  font-weight:900;
  letter-spacing:-.02em;
  color:var(--mist);
  margin-top:2em;
}
.prose h3{
  font-size:clamp(1.1rem,1.8vw,1.3rem);
  font-weight:800;
  color:var(--mist);
  margin-top:1.7em;
}
.prose ul,.prose ol{padding-left:1.25em;list-style:disc}
.prose ol{list-style:decimal}
.prose li + li{margin-top:.4em}
.prose a{color:var(--mint);text-decoration:underline;text-underline-offset:3px}
.prose strong{color:var(--mist);font-weight:800}
.prose code{
  font-family:var(--font-mono);
  font-size:.9em;
  padding:.15em .45em;
  border-radius:6px;
  background:rgba(77,240,193,.1);
  color:var(--mint);
}

.visually-hidden{
  position:absolute!important;
  width:1px;height:1px;
  padding:0;margin:-1px;
  overflow:hidden;
  clip:rect(0 0 0 0);
  clip-path:inset(50%);
  white-space:nowrap;
  border:0;
}

/* ---------- 4. Skip link ---------- */
.skip-link{
  position:fixed;
  left:16px;
  top:-140px;
  z-index:400;
  display:inline-flex;
  align-items:center;
  padding:12px 22px;
  border-radius:0 0 18px 18px;
  background:var(--orange);
  color:#1B0A02;
  font-weight:800;
  font-size:.95rem;
  text-decoration:none;
  box-shadow:0 14px 30px rgba(255,106,42,.35);
  transition:top .22s ease;
}
.skip-link:focus{top:0}

/* ---------- 5. 页头 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:linear-gradient(180deg, rgba(7,26,43,.96) 0%, rgba(7,26,43,.9) 100%);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}

.header-upper{
  overflow:hidden;
  max-height:110px;
  opacity:1;
  border-bottom:1px dashed rgba(77,240,193,.2);
  transition:max-height .42s cubic-bezier(.2,.7,.3,1), opacity .3s ease;
  background:linear-gradient(90deg, rgba(37,38,90,.5), rgba(14,59,67,.42) 55%, rgba(7,26,43,.2));
}
[data-header][data-scrolled] .header-upper{max-height:0;opacity:0}

.header-upper__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px 28px;
  padding-block:11px;
  flex-wrap:wrap;
}
.header-brandline{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.24em;
  color:var(--sand);
  margin:0;
}
.header-status{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  color:rgba(242,247,246,.72);
  margin:0;
}
.status-dot{
  flex:0 0 8px;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 10px rgba(77,240,193,.9);
  animation:tide-pulse 2.8s ease-out infinite;
}
@keyframes tide-pulse{
  0%{box-shadow:0 0 0 0 rgba(77,240,193,.55),0 0 10px rgba(77,240,193,.9)}
  70%{box-shadow:0 0 0 11px rgba(77,240,193,0),0 0 10px rgba(77,240,193,.9)}
  100%{box-shadow:0 0 0 0 rgba(77,240,193,0),0 0 10px rgba(77,240,193,.9)}
}

.header-lower__inner{
  display:flex;
  align-items:center;
  gap:14px;
  min-height:var(--header-h);
  padding-block:10px;
}

/* 品牌标记 */
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  flex:0 0 auto;
}
.brand__mark{
  position:relative;
  flex:0 0 40px;
  width:40px;
  height:40px;
  border-radius:50%;
  background:
    radial-gradient(circle at 34% 28%, rgba(77,240,193,.95), rgba(77,240,193,0) 58%),
    conic-gradient(from 205deg, var(--orange) 0 28%, var(--teal) 28% 64%, var(--indigo) 64% 100%);
  box-shadow:0 0 0 1px rgba(77,240,193,.32), 0 8px 20px rgba(0,0,0,.42);
  transition:transform .35s cubic-bezier(.2,.7,.3,1);
}
.brand__mark::after{
  content:"";
  position:absolute;
  inset:9px;
  border-radius:50%;
  background:var(--deep);
  box-shadow:inset 0 0 0 1px rgba(77,240,193,.45);
}
.brand__mark::before{
  content:"";
  position:absolute;
  left:50%;top:50%;
  width:7px;height:7px;
  margin:-3.5px 0 0 -3.5px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 10px var(--orange);
  z-index:1;
}
.brand:hover .brand__mark{transform:rotate(-14deg) scale(1.04)}

.brand__text{display:flex;flex-direction:column;line-height:1.1}
.brand__name{
  font-size:1.32rem;
  font-weight:900;
  letter-spacing:.05em;
  color:var(--mist);
}
.brand__sub{
  font-family:var(--font-mono);
  font-size:.6rem;
  letter-spacing:.3em;
  color:var(--slate);
  margin-top:4px;
}

/* 导航 */
.site-nav{margin-left:auto}
.site-nav__list{
  display:flex;
  align-items:center;
  gap:4px;
}
.site-nav__link{
  position:relative;
  display:inline-flex;
  align-items:center;
  padding:9px 16px;
  border-radius:999px;
  border:1px solid transparent;
  font-size:.95rem;
  font-weight:600;
  color:rgba(242,247,246,.76);
  text-decoration:none;
  white-space:nowrap;
  transition:color .2s ease, background .2s ease, border-color .2s ease;
}
.site-nav__link:hover{
  color:var(--mist);
  background:rgba(77,240,193,.09);
  border-color:rgba(77,240,193,.26);
}
.site-nav__link[aria-current="page"]{
  color:var(--mist);
  background:rgba(77,240,193,.14);
  border-color:rgba(77,240,193,.5);
  box-shadow:0 0 0 1px rgba(77,240,193,.1) inset;
}
.site-nav__link[aria-current="page"]::after{
  content:"";
  position:absolute;
  left:50%;
  bottom:-6px;
  width:6px;height:6px;
  margin-left:-3px;
  border-radius:50%;
  background:var(--orange);
  box-shadow:0 0 8px var(--orange);
}

/* 移动端切换按钮 */
.nav-toggle{
  display:none;
  align-items:center;
  gap:9px;
  padding:10px 16px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(14,59,67,.55);
  color:var(--mist);
  font-size:.9rem;
  font-weight:600;
  cursor:pointer;
  order:2;
}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:18px}
.nav-toggle__bar{display:block;height:2px;border-radius:2px;background:var(--mint);transition:transform .25s ease, opacity .2s ease}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
.nav-toggle__label{letter-spacing:.08em}

.header-cta{margin-left:6px;order:3}

/* ---------- 6. 按钮与标签 ---------- */
.btn{
  --btn-bg:transparent;
  --btn-fg:var(--mist);
  --btn-line:rgba(242,247,246,.28);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:13px 26px;
  border-radius:999px;
  border:1px solid var(--btn-line);
  background:var(--btn-bg);
  color:var(--btn-fg);
  font-size:.95rem;
  font-weight:700;
  line-height:1;
  letter-spacing:.02em;
  text-decoration:none;
  cursor:pointer;
  transition:transform .22s ease, box-shadow .22s ease, background .22s ease, color .22s ease, border-color .22s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}

.btn--primary{
  --btn-bg:var(--orange);
  --btn-fg:#1B0A02;
  --btn-line:rgba(255,106,42,0);
  box-shadow:0 12px 28px rgba(255,106,42,.28);
}
.btn--primary:hover{box-shadow:0 16px 36px rgba(255,106,42,.44)}

.btn--ghost{
  --btn-bg:rgba(77,240,193,.06);
  --btn-line:rgba(77,240,193,.34);
  --btn-fg:var(--mist);
}
.btn--ghost:hover{--btn-bg:rgba(77,240,193,.14);--btn-line:rgba(77,240,193,.6)}

.pill{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:30px;
  padding:0 14px;
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.12em;
  white-space:nowrap;
  border:1px solid rgba(77,240,193,.34);
  background:rgba(77,240,193,.09);
  color:var(--mint);
}
.pill--orange{
  border-color:rgba(255,106,42,.42);
  background:rgba(255,106,42,.13);
  color:#FFC2A4;
}
.pill--alert{
  border-color:rgba(255,77,94,.5);
  background:rgba(255,77,94,.13);
  color:#FFB3BA;
}
.pill--sand{
  border-color:rgba(217,201,163,.42);
  background:rgba(217,201,163,.1);
  color:var(--sand);
}
.pill::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:currentColor;
  flex:0 0 6px;
}

/* ---------- 7. 面包屑 ---------- */
.breadcrumb{padding-top:clamp(18px,3vw,28px)}
.breadcrumb__list{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  color:var(--ink-mute);
}
.breadcrumb__item + .breadcrumb__item::before{
  content:"/";
  margin-right:10px;
  color:rgba(143,166,178,.5);
}
.breadcrumb__link{
  color:rgba(242,247,246,.68);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .18s ease, border-color .18s ease;
}
.breadcrumb__link:hover{color:var(--mint);border-bottom-color:rgba(77,240,193,.6)}
.breadcrumb__current{color:var(--sand)}

/* ---------- 8. 网格与卡片 ---------- */
.grid{
  display:grid;
  gap:clamp(16px,2.4vw,28px);
  grid-template-columns:repeat(12,minmax(0,1fr));
}

.card{
  position:relative;
  border-radius:var(--r-lg);
  padding:clamp(20px,3vw,34px);
  background:linear-gradient(158deg, rgba(14,59,67,.92), rgba(11,36,52,.96));
  border:1px solid rgba(77,240,193,.14);
  box-shadow:var(--shadow-soft);
  overflow:hidden;
}
.card::before{
  content:"";
  position:absolute;
  inset:0 auto 0 0;
  width:3px;
  background:linear-gradient(180deg,var(--mint),rgba(77,240,193,0));
  opacity:.7;
}
.card__title{
  font-size:clamp(1.1rem,1.9vw,1.35rem);
  font-weight:800;
  color:var(--mist);
  margin:0 0 10px;
}
.card__meta{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  color:var(--ink-mute);
}

/* ---------- 9. 图片容器基础规则 ---------- */
.media{
  position:relative;
  isolation:isolate;
  overflow:hidden;
  border-radius:var(--r-lg);
  background:
    repeating-linear-gradient(118deg, rgba(77,240,193,.06) 0 2px, transparent 2px 22px),
    linear-gradient(152deg, #0E3B43 0%, #25265A 62%, #071A2B 100%);
  border:1px solid rgba(77,240,193,.16);
}
.media::after{
  content:"";
  position:absolute;
  inset:0;
  background:radial-gradient(120% 80% at 78% 0%, rgba(77,240,193,.16), transparent 62%);
  pointer-events:none;
  mix-blend-mode:screen;
}
.media > img,
.media > video{
  width:100%;
  height:100%;
  object-fit:cover;
  position:relative;
  z-index:1;
}
.media--16x9{aspect-ratio:16/9}
.media--4x3{aspect-ratio:4/3}
.media--1x1{aspect-ratio:1/1}
.media--tall{aspect-ratio:3/4}
.media--bleed{border-radius:0}
.media__caption{
  position:relative;
  z-index:2;
  margin:0;
  padding:14px 18px;
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.12em;
  color:var(--sand);
  border-top:1px solid rgba(217,201,163,.22);
  background:rgba(7,26,43,.6);
}

/* ---------- 10. 章节目录（长内容页可选） ---------- */
.toc{
  border-radius:var(--r-md);
  padding:20px 22px;
  background:rgba(14,59,67,.5);
  border:1px solid rgba(77,240,193,.16);
}
.toc__list{display:flex;flex-direction:column;gap:2px}
.toc__link{
  display:block;
  padding:8px 12px;
  border-radius:10px;
  font-size:.9rem;
  color:rgba(242,247,246,.7);
  text-decoration:none;
  border-left:2px solid transparent;
  transition:color .2s ease, background .2s ease, border-color .2s ease;
}
.toc__link:hover{color:var(--mist);background:rgba(77,240,193,.09)}
.toc__link[aria-current]{
  color:var(--mint);
  border-left-color:var(--orange);
  background:rgba(77,240,193,.12);
}

/* ---------- 11. 阅读进度与返回顶部 ---------- */
.scroll-progress{
  position:fixed;
  left:0;right:0;top:0;
  height:3px;
  z-index:300;
  pointer-events:none;
  background:transparent;
}
.scroll-progress > span{
  display:block;
  height:100%;
  width:0;
  background:linear-gradient(90deg,var(--mint),var(--orange));
  box-shadow:0 0 14px rgba(77,240,193,.7);
  transition:width .08s linear;
}

.back-to-top{
  position:fixed;
  right:clamp(14px,3vw,28px);
  bottom:clamp(18px,3vw,30px);
  z-index:200;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:12px 18px;
  border-radius:999px;
  border:1px solid rgba(77,240,193,.38);
  background:rgba(14,59,67,.9);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  color:var(--mist);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.14em;
  cursor:pointer;
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .28s ease, transform .28s ease, visibility .28s;
}
.back-to-top[data-visible]{opacity:1;visibility:visible;transform:none}
.back-to-top:hover{border-color:var(--orange);color:#FFD9C6}
.back-to-top::before{
  content:"↑";
  font-family:var(--font-body);
  font-size:.95rem;
  line-height:1;
  color:var(--mint);
}

/* ---------- 12. 滚动渐显 ---------- */
[data-reveal]{
  opacity:0;
  transform:translateY(20px);
  transition:opacity .7s cubic-bezier(.2,.7,.3,1), transform .7s cubic-bezier(.2,.7,.3,1);
  will-change:opacity, transform;
}
[data-reveal].is-visible{opacity:1;transform:none;will-change:auto}

/* ---------- 13. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(64px,9vw,140px);
  padding-top:clamp(48px,6vw,86px);
  color:var(--ink-soft);
  background:
    radial-gradient(120% 82% at 12% 0%, rgba(37,38,90,.88), transparent 62%),
    radial-gradient(92% 70% at 92% 6%, rgba(90,31,46,.55), transparent 58%),
    linear-gradient(180deg,#061624 0%,#04101B 100%);
  border-top:1px solid rgba(77,240,193,.18);
}
.site-footer::before{
  content:"";
  position:absolute;
  top:-1px;left:0;
  width:min(620px,72%);
  height:2px;
  background:linear-gradient(90deg,var(--orange),var(--mint) 55%,rgba(77,240,193,0));
}
.footer-tide{
  position:absolute;
  inset:0 0 auto 0;
  height:84px;
  pointer-events:none;
  background-image:repeating-linear-gradient(90deg, rgba(77,240,193,.3) 0 1px, transparent 1px 46px);
  -webkit-mask-image:linear-gradient(180deg,#000 0%, transparent 100%);
  mask-image:linear-gradient(180deg,#000 0%, transparent 100%);
  opacity:.55;
}

.footer-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr);
  gap:clamp(30px,4vw,52px);
  padding-bottom:clamp(30px,4vw,52px);
}

.footer-brand .brand{margin-bottom:20px}
.brand--footer .brand__name{font-size:1.4rem}
.footer-summary{
  max-width:34ch;
  font-size:.98rem;
  line-height:1.78;
  color:rgba(242,247,246,.76);
  margin:0 0 14px;
}
.footer-note{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.06em;
  line-height:1.7;
  color:var(--ink-mute);
  margin:0;
  padding-left:14px;
  border-left:2px solid rgba(217,201,163,.4);
}

.footer-nav{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:clamp(20px,3vw,36px);
}
.footer-heading{
  font-family:var(--font-mono);
  font-size:.72rem;
  font-weight:600;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--mint);
  margin:0 0 16px;
  padding-bottom:10px;
  border-bottom:1px solid rgba(77,240,193,.16);
}
.footer-list{display:flex;flex-direction:column;gap:2px}
.footer-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 0;
  font-size:.95rem;
  color:rgba(242,247,246,.7);
  text-decoration:none;
  transition:color .2s ease, transform .2s ease;
}
.footer-link::before{
  content:"";
  width:5px;height:5px;
  border-radius:50%;
  background:rgba(77,240,193,.4);
  transition:background .2s ease, box-shadow .2s ease;
  flex:0 0 5px;
}
.footer-link:hover{color:var(--mist);transform:translateX(3px)}
.footer-link:hover::before{background:var(--orange);box-shadow:0 0 8px var(--orange)}

.footer-contact{
  border-radius:var(--r-lg);
  padding:clamp(20px,3vw,28px);
  background:linear-gradient(160deg, rgba(14,59,67,.85), rgba(11,36,52,.92));
  border:1px solid rgba(77,240,193,.16);
}
.footer-contact__list{display:flex;flex-direction:column;gap:14px}
.footer-contact__row{
  display:grid;
  grid-template-columns:56px minmax(0,1fr);
  gap:12px;
  align-items:baseline;
}
.footer-contact__label{
  font-family:var(--font-mono);
  font-size:.7rem;
  letter-spacing:.16em;
  color:var(--ink-mute);
}
.footer-contact__value{
  font-size:.92rem;
  line-height:1.65;
  color:var(--mist);
  word-break:break-word;
}
.footer-contact__row:nth-child(2) .footer-contact__value,
.footer-contact__row:nth-child(1) .footer-contact__value{
  font-family:var(--font-mono);
  letter-spacing:.02em;
}
.footer-contact__note{
  margin:18px 0 0;
  padding-top:14px;
  border-top:1px dashed rgba(77,240,193,.22);
  font-size:.82rem;
  line-height:1.7;
  color:rgba(242,247,246,.66);
}

.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:14px 28px;
  padding-block:22px 28px;
  border-top:1px dashed rgba(77,240,193,.22);
}
.footer-copy{
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.12em;
  color:var(--ink-mute);
  margin:0;
}
.footer-legal{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:6px 20px;
  margin-inline:auto;
}
.footer-legal__link{
  font-size:.82rem;
  color:rgba(242,247,246,.66);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:color .2s ease, border-color .2s ease;
}
.footer-legal__link:hover{color:var(--mint);border-bottom-color:rgba(77,240,193,.6)}
.footer-icp{
  font-family:var(--font-mono);
  font-size:.74rem;
  letter-spacing:.1em;
  color:var(--ink-mute);
  margin:0;
}

/* ---------- 14. 平板 ---------- */
@media (min-width:720px){
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .footer-contact{grid-column:1 / -1}
}

/* ---------- 15. 移动导航（≤960px） ---------- */
@media (max-width:960px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    z-index:90;
    padding:16px clamp(18px,4vw,40px) 24px;
    background:linear-gradient(180deg, #0B2434 0%, #071A2B 100%);
    border-top:1px solid rgba(77,240,193,.2);
    border-bottom:1px solid rgba(77,240,193,.2);
    box-shadow:var(--shadow-deep);
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    pointer-events:none;
    transition:opacity .24s ease, transform .24s ease, visibility .24s;
  }
  .site-nav[data-open]{
    opacity:1;
    visibility:visible;
    transform:none;
    pointer-events:auto;
  }
  .site-nav__list{flex-direction:column;align-items:stretch;gap:8px}
  .site-nav__link{
    justify-content:flex-start;
    padding:14px 18px;
    border-radius:16px;
    font-size:1rem;
    background:rgba(14,59,67,.5);
    border-color:rgba(77,240,193,.12);
  }
  .site-nav__link[aria-current="page"]::after{
    left:auto;
    right:18px;
    bottom:50%;
    margin:0 0 -3px;
  }
  .header-cta{margin-left:auto;order:1;padding:11px 20px;font-size:.88rem}
  .nav-toggle{order:2;margin-left:0}
  .header-upper__inner{justify-content:flex-start;padding-block:9px}
  .header-brandline,.header-status{font-size:.68rem;letter-spacing:.16em}
}

@media (max-width:520px){
  :root{--header-h:66px}
  .brand__mark{flex-basis:34px;width:34px;height:34px}
  .brand__name{font-size:1.14rem}
  .brand__sub{display:none}
  .header-cta{padding:10px 15px;font-size:.82rem}
  .nav-toggle__label{display:none}
  .header-status{font-size:.64rem;letter-spacing:.1em}
  .footer-legal{margin-inline:0;width:100%}
}

/* ---------- 16. 桌面 ---------- */
@media (min-width:1024px){
  .footer-grid{
    grid-template-columns:minmax(0,1.25fr) minmax(0,1fr) minmax(0,1.05fr);
    align-items:start;
  }
  .footer-contact{grid-column:auto}
}

/* ---------- 17. 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;
  }
  [data-reveal]{opacity:1;transform:none}
  .scroll-progress > span{transition:none}
}